/* roulang page: index */
:root {
            --bg: #0B1322;
            --bg-deep: #070D17;
            --surface: rgba(255, 255, 255, 0.06);
            --surface-hover: rgba(255, 255, 255, 0.14);
            --border: rgba(255, 255, 255, 0.12);
            --primary: #2DF5C0;
            --primary-bright: #52F0A6;
            --heading: #E6EDF6;
            --body-text: #D3DEE9;
            --secondary-text: #A0AFC3;
            --weak-text: #6B7C93;
            --radius-card: 18px;
            --radius-element: 10px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--bg);
            color: var(--body-text);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        img {
            display: block;
            max-width: 100%;
            height: auto;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin-inline: auto;
            padding-inline: 24px;
        }

        .section {
            padding-block: 96px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            letter-spacing: 0.1em;
            color: var(--primary);
            font-weight: 600;
        }

        .eyebrow-line {
            width: 30px;
            height: 2px;
            background: var(--primary);
            display: inline-block;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 52px;
        }

        .section-title {
            font-size: 34px;
            line-height: 1.25;
            font-weight: 700;
            color: var(--heading);
            margin-top: 12px;
            letter-spacing: -0.01em;
        }

        .section-lead {
            margin-top: 12px;
            color: var(--secondary-text);
            font-size: 16px;
        }

        @media (max-width: 768px) {
            .section {
                padding-block: 64px;
            }
            .section-title {
                font-size: 28px;
            }
            .container {
                padding-inline: 20px;
            }
            .section-head {
                margin-bottom: 36px;
            }
        }

        @media (min-width: 1280px) {
            .hero-inner,
            .section-head {
                padding-left: 0;
                padding-right: 0;
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #062A23;
            box-shadow: 0 0 18px rgba(45, 245, 192, 0.35);
            border: 1px solid rgba(45, 245, 192, 0.6);
        }

        .btn-primary:hover {
            background: #3BFDCC;
            box-shadow: 0 0 30px rgba(45, 245, 192, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 14px rgba(45, 245, 192, 0.3);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(10px);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(45, 245, 192, 0.08);
        }

        .btn-lg {
            height: 52px;
            padding: 0 32px;
            font-size: 17px;
            border-radius: 12px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(11, 19, 34, 0.84);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 20px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            position: relative;
            flex-shrink: 0;
        }

        .logo-mark::after {
            content: "";
            position: absolute;
            inset: 5px;
            border-radius: 50%;
            border-left: 2px solid transparent;
            border-top: 2px solid var(--primary);
            border-right: 2px solid var(--primary);
            transform: rotate(30deg);
        }

        .logo-mark::before {
            content: "";
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--primary);
            position: absolute;
            right: -2px;
            top: 4px;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: #C7D2DE;
            padding: 8px 2px;
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 1px;
            left: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: width 0.25s ease;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::before {
            content: "";
            display: none;
        }

        .header-cta {
            margin-left: 4px;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            font-size: 18px;
            color: #FFFFFF;
            position: relative;
            z-index: 90;
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .drawer-mask {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(4px);
            z-index: 65;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.25s ease, visibility 0.25s ease;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: 0;
            width: min(86vw, 360px);
            height: 100dvh;
            background: #08101E;
            border-left: 1px solid rgba(255, 255, 255, 0.1);
            padding: 104px 28px 40px;
            transform: translateX(100%);
            transition: transform 0.3s cubic-bezier(0.77, 0, 0.18, 1);
            z-index: 70;
            display: flex;
            flex-direction: column;
        }

        body.nav-open .mobile-drawer {
            transform: translateX(0);
        }

        body.nav-open .drawer-mask {
            opacity: 1;
            visibility: visible;
        }

        .mobile-nav {
            display: flex;
            flex-direction: column;
        }

        .mobile-nav a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 2px;
            font-size: 17px;
            font-weight: 500;
            color: #E6EDF6;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: color 0.2s ease;
        }

        .mobile-nav a:hover {
            color: var(--primary);
        }

        .mobile-nav a i {
            font-size: 13px;
            color: var(--weak-text);
        }

        .mobile-drawer .drawer-cta {
            margin-top: 28px;
        }

        @media (max-width: 1023px) {
            .desktop-nav,
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .container {
                padding-inline: 20px;
            }
        }

        @media (min-width: 1024px) {
            .nav-toggle,
            .mobile-drawer,
            .drawer-mask {
                display: none !important;
            }
        }

        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background-color: #0B1322;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(11, 19, 34, 0.97) 0%, rgba(11, 19, 34, 0.86) 45%, rgba(11, 19, 34, 0.55) 100%);
        }

        .hero-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 64px;
            align-items: center;
            padding-block: 80px 112px;
        }

        .hero-copy {
            max-width: 640px;
        }

        .hero-copy .eyebrow {
            margin-bottom: 20px;
        }

        .hero-copy h1 {
            font-size: 52px;
            line-height: 1.22;
            font-weight: 800;
            color: #F2F6FC;
            letter-spacing: -0.02em;
        }

        .hero-sub {
            margin-top: 24px;
            font-size: 18px;
            line-height: 1.9;
            color: #A0AFC3;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 36px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .hero-stats .stat-item {
            display: flex;
            flex-direction: column;
        }

        .hero-stats .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .hero-stats .stat-num i {
            font-style: normal;
            color: var(--primary);
            font-size: 20px;
            margin-left: 2px;
        }

        .hero-stats .stat-label {
            font-size: 13px;
            color: var(--weak-text);
            margin-top: 2px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual-img {
            border-radius: 24px;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }

        .hero-visual::before {
            content: "";
            position: absolute;
            inset: -18px -18px auto auto;
            width: 70%;
            height: 70%;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(45, 245, 192, 0.12), transparent 65%);
            z-index: 0;
            pointer-events: none;
        }

        .hero-visual-card {
            position: absolute;
            bottom: -22px;
            left: -22px;
            background: rgba(11, 19, 34, 0.75);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            color: #FFFFFF;
            max-width: 260px;
        }

        .hero-visual-card .icon-wrap {
            width: 40px;
            height: 40px;
            background: rgba(45, 245, 192, 0.15);
            border-radius: 10px;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
        }

        .hero-visual-card strong {
            font-size: 15px;
            display: block;
        }

        .hero-visual-card span {
            display: block;
            font-size: 12px;
            color: var(--secondary-text);
        }

        @media (max-width: 1023px) {
            .hero {
                min-height: auto;
                padding-top: 32px;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 48px;
                padding-block: 40px 72px;
            }

            .hero-copy h1 {
                font-size: 38px;
            }

            .hero-sub {
                font-size: 16px;
            }

            .hero-visual-card {
                bottom: -14px;
                left: 10px;
            }

            .hero-stats {
                gap: 22px;
            }
        }

        @media (max-width: 520px) {
            .hero-copy h1 {
                font-size: 32px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-visual-card {
                position: static;
                margin-top: 14px;
            }
            .hero-inner {
                padding-bottom: 48px;
            }
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            grid-auto-flow: dense;
            gap: 24px;
        }

        .service-card {
            position: relative;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 18px;
            display: flex;
            flex-direction: column;
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .service-card:hover {
            transform: translateY(-4px);
            border-color: rgba(45, 245, 192, 0.5);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(45, 245, 192, 0.1);
        }

        .service-card-lg {
            grid-column: span 2;
            grid-row: span 2;
        }

        .service-card:nth-child(3) {
            grid-column: span 1;
        }

        .service-card .card-media {
            background-color: #0D1829;
            position: relative;
            overflow: hidden;
        }

        .service-card .card-media img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .service-card:hover .card-media img {
            transform: scale(1.04);
        }

        .service-card .media-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 19, 34, 0.05) 0%, rgba(11, 19, 34, 0.75) 100%);
        }

        .service-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 14px;
            position: relative;
            z-index: 1;
        }

        .card-pill {
            display: inline-block;
            background: rgba(45, 245, 192, 0.15);
            color: var(--primary);
            border: 1px solid rgba(45, 245, 192, 0.28);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.04em;
        }

        .service-card h3 {
            font-size: 21px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--heading);
        }

        .service-card p {
            font-size: 14px;
            color: var(--secondary-text);
            line-height: 1.8;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 6px;
            transition: gap 0.2s ease;
        }

        .card-link i {
            transition: transform 0.2s ease;
            font-size: 13px;
        }

        .service-card:hover .card-link i {
            transform: translateX(4px);
        }

        .service-card-lg .card-media img {
            aspect-ratio: 16/9;
        }

        .service-card-lg .service-card-body h3 {
            font-size: 28px;
        }

        .service-banner-card {
            grid-column: span 4;
            position: relative;
            border-radius: 18px;
            overflow: hidden;
            min-height: 160px;
            display: flex;
            align-items: center;
            padding: 32px 36px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background-size: cover;
            background-position: center;
        }

        .service-banner-card .banner-content {
            position: relative;
            z-index: 1;
            max-width: 640px;
        }

        .service-banner-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
        }

        .service-banner-card p {
            color: rgba(230, 237, 246, 0.85);
            margin-top: 8px;
            font-size: 15px;
        }

        .service-banner-card .btn {
            margin-top: 18px;
        }

        @media (max-width: 1023px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .service-card-lg {
                grid-column: span 2;
                grid-row: span 1;
            }
            .service-banner-card {
                grid-column: span 2;
            }
        }

        @media (max-width: 600px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
            .service-card-lg,
            .service-banner-card {
                grid-column: span 1;
            }
            .service-card-lg .service-card-body h3 {
                font-size: 22px;
            }
            .service-banner-card {
                padding: 28px 24px;
            }
        }

        .testi-section {
            position: relative;
            background: rgba(8, 13, 25, 0.8);
            overflow: hidden;
        }

        .testi-section::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(45, 245, 192, 0.07), transparent 62%);
        }

        .testi-carousel {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .testi-item {
            margin: 0;
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            padding: 28px;
            transition: background 0.25s ease, border-color 0.25s ease;
            height: 100%;
        }

        .testi-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(45, 245, 192, 0.3);
        }

        .stars {
            color: #F5B84C;
            display: flex;
            gap: 4px;
            font-size: 14px;
            margin-bottom: 14px;
        }

        .testi-quote {
            font-size: 15px;
            color: #CBD5E0;
            flex: 1;
            line-height: 1.85;
        }

        .testi-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 22px;
        }

        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #1A2839;
            border: 1px solid rgba(45, 245, 192, 0.5);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 700;
        }

        .testi-user strong {
            display: block;
            font-size: 15px;
            color: #E6EDF6;
            line-height: 1.3;
        }

        .testi-user span {
            display: block;
            font-size: 12px;
            color: var(--weak-text);
        }

        .testi-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 18px;
            margin-top: 34px;
        }

        .carousel-arrow {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #FFFFFF;
            border-radius: 50%;
            transition: 0.2s;
        }

        .carousel-arrow:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .testi-dots {
            display: flex;
            gap: 6px;
        }

        .testi-dots span {
            width: 8px;
            height: 8px;
            border-radius: 99px;
            background: rgba(255, 255, 255, 0.25);
            display: block;
            transition: 0.2s;
        }

        .testi-dots span.active {
            background: var(--primary);
            width: 20px;
        }

        @media (max-width: 1023px) {
            .testi-carousel {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .testi-item {
                padding: 22px;
            }
        }

        .guarantee-strip {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            background: rgba(255, 255, 255, 0.02);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }

        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 28px 24px;
            border-left: 1px solid rgba(255, 255, 255, 0.08);
        }

        .guarantee-item:first-child {
            padding-left: 0;
            border-left: none;
        }

        .g-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            color: var(--primary);
            background: rgba(45, 245, 192, 0.1);
            border: 1px solid rgba(45, 245, 192, 0.2);
            font-size: 18px;
        }

        .g-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-top: 2px;
        }

        .g-desc {
            margin-top: 6px;
            font-size: 13px;
            color: var(--secondary-text);
            line-height: 1.7;
        }

        @media (max-width: 1023px) {
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-item:nth-child(2) {
                border-left: none;
            }
            .guarantee-item {
                padding: 22px 12px;
            }
        }

        @media (max-width: 640px) {
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-item {
                border-left: none;
                padding: 18px 4px;
            }
        }

        .news-section {
            background: linear-gradient(180deg, #0B1322 0%, rgba(8, 13, 25, 0.8) 100%);
        }

        .news-section .section-head-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 42px;
        }

        .section-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            padding: 10px 18px;
            border-radius: 999px;
            border: 1px solid rgba(45, 245, 192, 0.3);
            transition: 0.2s;
            white-space: nowrap;
        }

        .section-more:hover {
            background: rgba(45, 245, 192, 0.08);
        }

        .news-featured-card {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            background-size: cover;
            background-position: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.3);
        }

        .news-featured-card .featured-mask {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 19, 34, 0.1) 0%, rgba(11, 19, 34, 0.92) 100%);
        }

        .news-featured-content {
            padding: 26px;
            position: relative;
            z-index: 1;
            width: 100%;
        }

        .news-featured-content h3 {
            font-size: 25px;
            line-height: 1.4;
            font-weight: 700;
            color: #fff;
            margin-top: 12px;
        }

        .news-featured-content p {
            font-size: 14px;
            color: rgba(210, 227, 235, 0.9);
            margin-top: 8px;
            max-width: 420px;
        }

        .news-list-wrap {
            display: flex;
            flex-direction: column;
        }

        .news-list {
            display: flex;
            flex-direction: column;
        }

        .news-item {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 22px 6px 22px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: 0.2s;
        }

        .news-item:hover {
            padding-left: 8px;
        }

        .news-item-top {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
        }

        .news-top-cat {
            color: var(--primary);
            background: rgba(45, 245, 192, 0.08);
            padding: 3px 9px;
            border-radius: 999px;
            border: 1px solid rgba(45, 245, 192, 0.2);
        }

        .news-top-date {
            color: var(--weak-text);
        }

        .news-item h3 {
            font-size: 17px;
            color: #E6EDF6;
            font-weight: 600;
            line-height: 1.55;
            transition: color 0.2s;
        }

        .news-item:hover h3 {
            color: var(--primary);
        }

        .news-item p {
            font-size: 14px;
            color: var(--secondary-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .read-link {
            font-size: 13px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .news-empty {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            text-align: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px dashed rgba(255, 255, 255, 0.14);
            border-radius: 18px;
            padding: 52px 22px;
            flex-direction: column;
            color: var(--weak-text);
            font-size: 15px;
            min-height: 260px;
        }

        .news-empty i {
            font-size: 30px;
            color: rgba(255, 255, 255, 0.25);
        }

        @media (max-width: 1023px) {
            .news-section .section-head-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .news-featured-card {
                min-height: 280px;
            }
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            margin-bottom: 14px;
            transition: 0.2s;
        }

        .faq-item.open {
            border-color: rgba(45, 245, 192, 0.4);
            background: rgba(45, 245, 192, 0.04);
        }

        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 18px 22px;
            text-align: left;
            font-size: 17px;
            font-weight: 600;
            color: var(--heading);
            cursor: pointer;
        }

        .faq-q .faq-icon {
            display: flex;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.24);
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all 0.2s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            border-color: var(--primary);
            color: var(--primary);
        }

        .faq-a {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--secondary-text);
            font-size: 15px;
            line-height: 1.9;
        }

        .faq-item.open .faq-a {
            padding: 0 22px 20px;
            max-height: 400px;
        }

        @media (max-width: 640px) {
            .faq-q {
                font-size: 16px;
                padding: 16px;
            }
            .faq-a {
                font-size: 14px;
            }
        }

        .cta-strip {
            position: relative;
            background-size: cover;
            background-position: center;
            padding-block: 86px;
        }

        .cta-strip::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 13, 23, 0.96), rgba(11, 19, 34, 0.9));
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin-inline: auto;
        }

        .cta-inner h2 {
            font-size: 34px;
            color: #fff;
            font-weight: 800;
            line-height: 1.35;
        }

        .cta-inner p {
            margin-top: 16px;
            color: var(--secondary-text);
            font-size: 16px;
        }

        .cta-inner .btn {
            margin-top: 28px;
        }

        @media (max-width: 768px) {
            .cta-strip {
                padding-block: 64px;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
        }

        .site-footer::before {
            content: "";
            display: block;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 245, 192, 0.6), transparent);
            position: absolute;
            top: 0;
            left: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 50px;
            padding-block: 72px 48px;
        }

        .footer-brand {
            max-width: 340px;
        }

        .footer-brand p {
            margin-top: 18px;
            font-size: 14px;
            color: var(--secondary-text);
            line-height: 1.85;
        }

        .footer-title {
            font-size: 17px;
            color: #FFFFFF;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: var(--secondary-text);
            font-size: 14px;
            transition: 0.2s;
            width: fit-content;
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }

        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            color: var(--secondary-text);
            font-size: 14px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--primary);
            margin-top: 5px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-block: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            flex-wrap: wrap;
            color: var(--weak-text);
            font-size: 13px;
        }

        .back-top-button {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            color: #fff;
            transition: 0.2s;
            cursor: pointer;
        }

        .back-top-button:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
        }

        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }

        .badge-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }

        .badge-pill {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 13px;
            color: var(--secondary-text);
        }

        .badge-pill i {
            color: var(--primary);
            margin-right: 4px;
            font-size: 11px;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        ::selection {
            background: rgba(45, 245, 192, 0.2);
            color: #ffffff;
        }

/* roulang page: article */
:root {
            --primary: #2DF5C0;
            --primary-rgb: 45, 245, 192;
            --primary-dark: #18d9a2;
            --bg: #0B1322;
            --bg-deep: #070D17;
            --surface: rgba(255, 255, 255, 0.06);
            --surface-hover: rgba(255, 255, 255, 0.12);
            --border: rgba(255, 255, 255, 0.13);
            --border-light: rgba(255, 255, 255, 0.08);
            --heading: #E6EDF6;
            --body: #A0AFC3;
            --muted: #677f9a;
            --card-radius: 18px;
            --font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg);
            color: var(--body);
            font-family: var(--font);
            line-height: 1.75;
            overflow-x: hidden;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        img {
            max-width: 100%;
            display: block;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
            outline: none;
        }

        ::selection {
            background: rgba(var(--primary-rgb), .3);
            color: #fff;
        }

        /* container */
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 48px;
            padding-right: 48px;
        }

        @media (max-width: 1023px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        /* ---------- header / nav ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 19, 34, .82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 78px;
            gap: 20px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 14px;
            background: linear-gradient(145deg, rgba(45, 245, 192, .25), transparent 60%), rgba(255, 255, 255, .08);
            border: 1px solid rgba(45, 245, 192, .45);
            position: relative;
            display: inline-block;
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(var(--primary-rgb), .2);
        }

        .logo-mark::before {
            content: "";
            position: absolute;
            width: 18px;
            height: 10px;
            border: 2px solid var(--primary);
            border-left: none;
            border-right: none;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border-radius: 50%;
        }

        .logo-mark::after {
            content: "";
            position: absolute;
            width: 4px;
            height: 4px;
            background: var(--primary);
            border-radius: 50%;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .brand-name {
            font-size: 21px;
            font-weight: 800;
            letter-spacing: .02em;
            color: var(--heading);
            white-space: nowrap;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 9px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--body);
            border-radius: 10px;
            transition: color .2s, background .2s;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(var(--primary-rgb), .08);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 999px;
            box-shadow: 0 0 12px rgba(var(--primary-rgb), .8);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1;
            transition: all .25s ease;
        }

        .btn-primary {
            background: var(--primary);
            color: #081a1a;
            padding: 15px 24px;
            box-shadow: 0 0 18px rgba(var(--primary-rgb), .36);
            min-height: 46px;
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background: #5df8d1;
            box-shadow: 0 0 30px rgba(var(--primary-rgb), .55);
            transform: translateY(-1px);
            color: #041414;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 14px rgba(var(--primary-rgb), .28);
        }

        .btn-outline {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .32);
            color: #eef6ff;
            padding: 14px 22px;
            min-height: 44px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(var(--primary-rgb), .08);
        }

        .header-cta {
            padding: 0 24px;
            height: 42px;
            font-size: 14px;
            border-radius: 10px;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-light);
            color: var(--heading);
            font-size: 18px;
            background: rgba(255, 255, 255, .04);
            transition: all .2s;
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .nav-toggle:focus-visible,
        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        @media (max-width: 1023px) {
            .desktop-nav {
                position: fixed;
                top: 0;
                right: -320px;
                width: 300px;
                height: 100vh;
                background: rgba(9, 16, 29, .98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 30px 20px 30px;
                gap: 8px;
                border-left: 1px solid var(--border-light);
                z-index: 120;
                transition: right .35s cubic-bezier(.2, .8, .25, 1);
                box-shadow: -30px 0 60px rgba(0, 0, 0, .3);
            }

            .desktop-nav.menu-open {
                right: 0;
            }

            .desktop-nav .nav-link {
                display: block;
                padding: 14px 18px;
                font-size: 16px;
                border-radius: 12px;
            }

            .desktop-nav .nav-link.active::after {
                left: 18px;
                right: auto;
                width: 28px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .header-cta {
                display: none;
            }
        }

        .mobile-menu-cta {
            margin: 18px 0 8px;
            width: 100%;
            justify-content: center;
            padding: 0 20px;
            min-height: 46px;
        }

        /* ---------- article hero ---------- */
        .article-hero {
            position: relative;
            padding: 66px 0 44px;
            background:
                linear-gradient(135deg, rgba(11, 19, 34, .92) 0%, rgba(13, 25, 43, .84) 55%, rgba(15, 31, 47, .72) 100%),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border-light);
        }

        .article-hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), .3), transparent);
        }

        .article-wrap {
            max-width: 1000px;
            margin: 0 auto;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 26px;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .crumb-current {
            color: var(--heading);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 280px;
        }

        .breadcrumb i {
            font-size: 11px;
            color: rgba(255, 255, 255, .25);
        }

        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 18px;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(var(--primary-rgb), .1);
            color: var(--primary);
            border: 1px solid rgba(var(--primary-rgb), .3);
        }

        .meta-time {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--body);
        }

        .meta-time i {
            color: var(--primary);
            font-size: 13px;
        }

        .article-hero h1 {
            font-size: clamp(30px, 4.2vw, 48px);
            line-height: 1.2;
            font-weight: 800;
            color: var(--heading);
            letter-spacing: -.01em;
            max-width: 900px;
            margin-bottom: 12px;
        }

        .article-lead {
            font-size: 16px;
            line-height: 1.8;
            color: var(--body);
            max-width: 840px;
            margin-top: 14px;
        }

        /* ---------- article main body ---------- */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
            position: relative;
            z-index: 2;
        }

        .article-reading {
            max-width: 980px;
            margin: 0 auto;
        }

        .article-cover-wrap {
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid var(--border);
            aspect-ratio: 16 / 9;
            background: #101b2c;
            margin-bottom: 52px;
            position: relative;
        }

        .article-cover-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-cover-fallback {
            background: linear-gradient(135deg, rgba(45, 245, 192, .1), rgba(255, 255, 255, .02)), url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
        }

        .article-content-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            max-width: 1080px;
            margin: 0 auto;
        }

        .article-body-col {
            max-width: 860px;
            width: 100%;
        }

        /* article prose */
        .article-prose {
            font-size: 17px;
            line-height: 1.9;
            color: #cbdcf0;
            word-break: break-word;
        }

        .article-prose p {
            margin-bottom: 1.9em;
        }

        .article-prose h2 {
            font-size: 26px;
            color: var(--heading);
            margin: 2.6em 0 1em;
            font-weight: 800;
            line-height: 1.4;
        }

        .article-prose h3 {
            font-size: 21px;
            color: var(--heading);
            margin: 2.2em 0 .9em;
            font-weight: 700;
            line-height: 1.5;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .article-prose h3::before {
            content: "";
            width: 10px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .article-prose h4 {
            font-size: 19px;
            color: var(--heading);
            margin: 1.8em 0 .7em;
            font-weight: 700;
        }

        .article-prose a {
            color: var(--primary);
            border-bottom: 1px solid rgba(var(--primary-rgb), .35);
        }

        .article-prose a:hover {
            border-bottom-color: var(--primary);
        }

        .article-prose ul,
        .article-prose ol {
            margin: 0 0 2em;
            padding-left: 1.6em;
        }

        .article-prose ul li,
        .article-prose ol li {
            margin-bottom: .5em;
        }

        .article-prose ul li::marker {
            color: var(--primary);
        }

        .article-prose ol li::marker {
            color: var(--primary);
            font-weight: 700;
        }

        .article-prose blockquote {
            margin: 2em 0;
            padding: 18px 24px 18px 28px;
            border-radius: 6px 18px 18px 6px;
            background: rgba(255, 255, 255, .05);
            border-left: 3px solid var(--primary);
            color: var(--heading);
            font-size: 16px;
        }

        .article-prose blockquote p {
            margin-bottom: 0;
        }

        .article-prose img {
            border-radius: 16px;
            margin: 2em auto;
            border: 1px solid var(--border-light);
        }

        .article-prose table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
            font-size: 15px;
            border-radius: 12px;
            overflow: hidden;
            background: rgba(255, 255, 255, .02);
            border: 1px solid var(--border-light);
        }

        .article-prose th {
            background: rgba(45, 245, 192, .12);
            color: var(--heading);
            padding: 12px 16px;
            text-align: left;
            font-weight: 700;
        }

        .article-prose td {
            padding: 12px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, .05);
        }

        .article-prose td:last-child,
        .article-prose th:last-child {
            border-right: none;
        }

        .article-prose figure {
            margin: 2em 0;
        }

        .article-prose figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--muted);
            margin-top: 12px;
        }

        .article-prose code {
            background: rgba(45, 245, 192, .1);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: 'SFMono-Regular', Consolas, monospace;
        }

        .article-prose strong {
            color: var(--heading);
            font-weight: 700;
        }

        .article-notfound {
            text-align: center;
            padding: 80px 20px;
            max-width: 860px;
            margin: 0 auto;
        }

        .notfound-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--primary);
            border: 1px solid rgba(var(--primary-rgb), .3);
            border-radius: 24px;
            background: rgba(var(--primary-rgb), .1);
        }

        .notfound-title {
            font-size: 28px;
            color: var(--heading);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .notfound-desc {
            max-width: 420px;
            margin: 0 auto 28px;
            color: var(--body);
            font-size: 15px;
        }

        /* article bottom extras */
        .article-footer-bar {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 13px;
            border-radius: 999px;
            font-size: 13px;
            background: rgba(255, 255, 255, .04);
            border: 1px solid var(--border-light);
            color: var(--body);
        }

        .article-tags .tag:hover {
            border-color: rgba(var(--primary-rgb), .3);
            color: var(--primary);
        }

        .meta-view {
            display: inline-flex;
            gap: 6px;
            color: var(--muted);
            font-size: 14px;
        }

        .back-home-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: var(--heading);
            font-size: 14px;
            font-weight: 600;
            background: rgba(255, 255, 255, .03);
        }

        .back-home-link:hover {
            color: var(--primary);
            border-color: rgba(var(--primary-rgb), .3);
            transform: translateX(-3px);
        }

        /* nav pager */
        .post-pager {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin-top: 40px;
        }

        .pager-item {
            padding: 22px;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            background: rgba(255, 255, 255, .03);
            transition: all .2s ease;
            display: block;
            min-height: 88px;
        }

        .pager-item:hover {
            border-color: rgba(var(--primary-rgb), .35);
            background: rgba(var(--primary-rgb), .06);
            transform: translateY(-2px);
        }

        .pager-label {
            font-size: 12px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 8px;
        }

        .pager-label i {
            color: var(--primary);
        }

        .pager-title {
            font-size: 15px;
            color: var(--heading);
            font-weight: 600;
            line-height: 1.5;
        }

        .pager-item.disabled {
            opacity: .5;
            pointer-events: none;
            filter: saturate(.5);
        }

        @media (max-width: 640px) {
            .post-pager {
                grid-template-columns: 1fr;
            }
        }

        /* related post */
        .related-section {
            margin-top: 48px;
        }

        .related-title {
            font-size: 22px;
            color: var(--heading);
            font-weight: 800;
            margin-bottom: 22px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-title::before {
            content: "";
            width: 6px;
            height: 20px;
            background: var(--primary);
            border-radius: 3px;
        }

        .related-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }

        .related-card {
            border: 1px solid var(--border-light);
            background: rgba(255, 255, 255, .03);
            border-radius: 16px;
            padding: 14px;
            display: flex;
            gap: 12px;
            align-items: center;
            transition: all .2s;
        }

        .related-card:hover {
            border-color: rgba(var(--primary-rgb), .3);
            background: rgba(255, 255, 255, .06);
        }

        .related-thumb {
            width: 64px;
            height: 64px;
            border-radius: 12px;
            flex-shrink: 0;
            background: linear-gradient(135deg, rgba(var(--primary-rgb), .15), transparent), url('/assets/images/coverpic/cover-4.webp') center/cover no-repeat;
        }

        .related-info h4 {
            font-size: 14px;
            color: var(--heading);
            line-height: 1.4;
            font-weight: 600;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-date {
            font-size: 12px;
            color: var(--muted);
            margin-top: 6px;
        }

        @media (max-width: 640px) {
            .related-cards {
                grid-template-columns: 1fr;
            }
        }

        /* CTA */
        .site-cta {
            background: var(--bg);
            padding: 0 0 60px;
        }

        .cta-box {
            position: relative;
            background:
                linear-gradient(135deg, rgba(11, 19, 34, .94), rgba(11, 19, 34, .78)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border: 1px solid var(--border-light);
            border-radius: 24px;
            padding: 56px 40px;
            overflow: hidden;
            text-align: center;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(var(--primary-rgb), .14), transparent 70%);
            top: -120px;
            right: -60px;
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(24px, 3vw, 34px);
            color: var(--heading);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--body);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 40px 20px;
            }
        }

        /* ---------- footer ---------- */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-light);
            padding-top: 60px;
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 320px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), .7), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 50px;
        }

        .site-footer .brand-logo {
            margin-bottom: 16px;
        }

        .site-footer .brand-name {
            font-size: 20px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--body);
            line-height: 1.9;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 18px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-light);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--body);
            padding: 5px 0;
            transition: all .2s;
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }

        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-contact li {
            font-size: 14px;
            color: var(--body);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact li i {
            color: var(--primary);
            width: 16px;
            text-align: center;
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding: 20px 0 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--muted);
        }

        .back-top-button {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: var(--body);
            font-size: 15px;
            transition: all .2s;
            background: rgba(255, 255, 255, .03);
        }

        .back-top-button:hover {
            color: #041414;
            background: var(--primary);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 30px;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer-bottom {
                flex-direction: column-reverse;
                justify-content: center;
                text-align: center;
            }
        }

        /* overlay for mobile menu */
        .menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .5);
            z-index: 110;
            opacity: 0;
            visibility: hidden;
            transition: all .3s;
            backdrop-filter: blur(3px);
        }

        .menu-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* reduce motion */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
        --bg: #0B1322;
        --bg-deep: #070D17;
        --surface: rgba(255, 255, 255, 0.06);
        --surface-hover: rgba(255, 255, 255, 0.14);
        --border: rgba(255, 255, 255, 0.12);
        --border-strong: rgba(255, 255, 255, 0.18);
        --primary: #2DF5C0;
        --primary-soft: rgba(45, 245, 192, 0.14);
        --text: #E6EDF6;
        --text-sub: #A0AFC3;
        --text-muted: #6B7C93;
        --star: #F6C05B;
        --radius: 18px;
        --radius-sm: 10px;
        --container: 1280px;
        --space-section: 112px;
        --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
        --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--bg);
        color: var(--text);
        font-family: var(--font);
        line-height: 1.8;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }

    body::before {
        content: "";
        position: fixed;
        inset: 0;
        z-index: -1;
        background-image:
            linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
        background-size: 40px 40px;
        pointer-events: none;
    }

    img {
        display: block;
        max-width: 100%;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    button,
    input,
    textarea {
        font-family: inherit;
    }

    .container {
        width: 100%;
        max-width: var(--container);
        margin-inline: auto;
        padding-inline: clamp(20px, 4vw, 64px);
    }

    .section {
        padding-block: var(--space-section);
    }

    .section-alt {
        background: rgba(255, 255, 255, 0.03);
        border-block: 1px solid rgba(255, 255, 255, 0.08);
    }

    .eyebrow {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--primary);
        letter-spacing: 0.08em;
        font-size: 13px;
        font-weight: 700;
        text-transform: uppercase;
        margin-bottom: 14px;
    }

    .eyebrow::after {
        content: "";
        width: 36px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
        box-shadow: 0 0 12px rgba(45, 245, 192, 0.6);
    }

    h1,
    h2,
    h3,
    h4 {
        line-height: 1.25;
        margin: 0;
        letter-spacing: 0.01em;
        color: #fff;
    }

    h2 {
        font-size: clamp(28px, 3.4vw, 42px);
        font-weight: 800;
        margin-bottom: 18px;
    }

    h3 {
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 8px;
    }

    p {
        margin: 0;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 0 22px;
        height: 46px;
        border-radius: 12px;
        font-size: 15px;
        font-weight: 700;
        letter-spacing: 0.02em;
        border: 1px solid transparent;
        transition: all 0.2s ease;
        cursor: pointer;
        line-height: 1;
        white-space: nowrap;
    }

    .btn-primary {
        background: var(--primary);
        color: #08121A;
        box-shadow: 0 0 18px rgba(45, 245, 192, 0.4);
    }

    .btn-primary:hover {
        background: #7DF8D6;
        box-shadow: 0 0 26px rgba(45, 245, 192, 0.55);
        transform: translateY(-2px);
    }

    .btn-primary:active {
        transform: translateY(1px);
        box-shadow: 0 0 14px rgba(45, 245, 192, 0.35);
    }

    .btn-outline {
        border-color: rgba(255, 255, 255, 0.3);
        color: #fff;
        background: rgba(255, 255, 255, 0.04);
    }

    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: rgba(45, 245, 192, 0.08);
        transform: translateY(-1px);
    }

    .btn-outline:active {
        transform: translateY(1px);
    }

    .btn:focus-visible,
    .nav-link:focus-visible,
    a:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 4px;
        border-radius: 6px;
    }

    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(11, 19, 34, 0.82);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .header-inner {
        display: flex;
        align-items: center;
        height: 78px;
        gap: 28px;
        justify-content: space-between;
    }

    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }

    .logo-mark {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        border: 2px solid var(--primary);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 17px;
        background: rgba(45, 245, 192, 0.08);
        box-shadow: 0 0 16px rgba(45, 245, 192, 0.25);
    }

    .brand-name {
        font-size: 21px;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0.02em;
        line-height: 1.2;
    }

    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 9px 15px;
        border-radius: 9px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-sub);
        transition: all 0.2s ease;
        position: relative;
    }

    .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.06);
    }

    .nav-link.active {
        color: var(--primary);
        background: rgba(45, 245, 192, 0.08);
    }

    .nav-link.active::after {
        content: "";
        position: absolute;
        left: 16px;
        right: 16px;
        bottom: 3px;
        height: 2px;
        background: var(--primary);
        border-radius: 99px;
        box-shadow: 0 0 8px var(--primary);
    }

    .header-cta {
        flex-shrink: 0;
    }

    .nav-toggle {
        display: none;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: 10px;
        color: #fff;
        font-size: 18px;
        cursor: pointer;
        flex-shrink: 0;
    }

    /* Hero */
    .category-hero {
        position: relative;
        overflow: hidden;
        padding: 96px 0 90px;
        background:
            radial-gradient(ellipse at 18% 30%, rgba(45, 245, 192, 0.14), transparent 34%),
            radial-gradient(ellipse at 88% 78%, rgba(191, 233, 255, 0.08), transparent 30%),
            rgba(11, 19, 34, 0.96);
    }

    .hero-wrap {
        display: grid;
        grid-template-columns: 1.05fr 0.95fr;
        gap: 64px;
        align-items: center;
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 18px;
    }

    .breadcrumb a {
        color: var(--text-sub);
        transition: color 0.2s ease;
    }

    .breadcrumb a:hover {
        color: var(--primary);
    }

    .breadcrumb i {
        font-size: 11px;
        color: var(--text-muted);
    }

    .category-hero h1 {
        font-size: clamp(48px, 7vw, 76px);
        font-weight: 850;
        line-height: 1;
        color: #fff;
        letter-spacing: -0.02em;
        margin-bottom: 20px;
    }

    .category-hero h1 span {
        color: var(--primary);
    }

    .hero-lead {
        color: var(--text-sub);
        font-size: clamp(16px, 1.5vw, 19px);
        max-width: 34em;
        line-height: 1.9;
        margin-bottom: 32px;
    }

    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        margin-bottom: 44px;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 26px;
        max-width: 620px;
    }

    .stat-box {
        padding-right: 16px;
    }

    .stat-box + .stat-box {
        border-left: 1px solid rgba(255, 255, 255, 0.1);
        padding-left: 20px;
    }

    .stat-box strong {
        display: block;
        color: #fff;
        font-size: clamp(20px, 2vw, 30px);
        font-weight: 800;
        line-height: 1.2;
    }

    .stat-box strong span {
        color: var(--primary);
    }

    .stat-box small {
        color: var(--text-muted);
        font-size: 13px;
        line-height: 1.4;
        margin-top: 6px;
        display: block;
    }

    .hero-media {
        position: relative;
        border-radius: 24px;
        padding: 12px;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.12);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
        box-shadow: var(--shadow);
    }

    .hero-media img {
        border-radius: 16px;
        width: 100%;
        height: 380px;
        object-fit: cover;
        background: #101B2A;
    }

    .hero-note {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 14px 4px 2px;
        color: var(--text-sub);
        font-size: 14px;
    }

    .hero-note .pulse-dot {
        width: 9px;
        height: 9px;
        background: var(--primary);
        border-radius: 50%;
        box-shadow: 0 0 10px var(--primary);
        flex-shrink: 0;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; transform: scale(1); }
        50% { opacity: 0.5; transform: scale(0.9); }
    }

    .pulse-dot {
        animation: pulse 1.8s ease-in-out infinite;
    }

    /* Split grid Section */
    .split-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 62px;
        align-items: center;
    }

    .media-col {
        position: relative;
    }

    .media-col img {
        width: 100%;
        border-radius: 20px;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        background: #101B2A;
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: var(--shadow);
    }

    .media-col::after {
        content: "";
        position: absolute;
        inset: -18px auto auto -18px;
        width: 54%;
        height: 54%;
        background: rgba(45, 245, 192, 0.1);
        border-radius: 24px;
        z-index: -1;
    }

    .media-caption {
        margin-top: 16px;
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-muted);
        font-size: 14px;
    }

    .media-caption::before {
        content: "";
        width: 24px;
        height: 2px;
        background: var(--primary);
        display: block;
        border-radius: 99px;
    }

    .content-col p,
    .faq-intro p,
    .section-heading p {
        color: var(--text-sub);
        font-size: 16px;
        line-height: 1.9;
    }

    .check-list {
        margin-top: 28px;
        display: grid;
        gap: 14px;
    }

    .check-list li {
        position: relative;
        padding-left: 34px;
        color: #C8D4E2;
        font-size: 15px;
    }

    .check-list li::before {
        content: "\f00c";
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        position: absolute;
        left: 0;
        top: 2px;
        width: 24px;
        height: 24px;
        color: var(--primary);
        background: rgba(45, 245, 192, 0.12);
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
    }

    /* Section heading */
    .section-heading {
        max-width: 760px;
        margin-bottom: 44px;
    }

    .section-heading p {
        margin-top: 6px;
    }

    /* Event type list */
    .type-list {
        border-top: 1px solid rgba(255, 255, 255, 0.12);
    }

    .type-row {
        display: grid;
        grid-template-columns: 88px 1.2fr 1.8fr auto;
        gap: 28px;
        align-items: center;
        padding: 28px 12px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        transition: background 0.2s ease, transform 0.2s ease;
        border-radius: 10px;
    }

    .type-row:hover {
        background: rgba(255, 255, 255, 0.04);
        transform: translateX(4px);
    }

    .type-sn {
        font-size: 24px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.02em;
        font-variant-numeric: tabular-nums;
    }

    .type-name strong {
        display: block;
        color: #fff;
        font-size: 19px;
        font-weight: 700;
    }

    .type-name span {
        color: var(--text-muted);
        font-size: 13px;
    }

    .type-info {
        color: var(--text-sub);
        font-size: 15px;
        line-height: 1.7;
    }

    .type-tag {
        justify-self: end;
        padding: 6px 12px;
        background: rgba(45, 245, 192, 0.1);
        border: 1px solid rgba(45, 245, 192, 0.3);
        color: var(--primary);
        border-radius: 99px;
        font-size: 13px;
        font-weight: 600;
        white-space: nowrap;
    }

    /* Flow */
    .flow-wrap {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 16px;
        counter-reset: flow;
    }

    .flow-step {
        padding: 20px 0;
        border-top: 2px solid rgba(255, 255, 255, 0.14);
        position: relative;
    }

    .flow-step::before {
        content: "";
        position: absolute;
        width: 10px;
        height: 10px;
        background: var(--primary);
        border-radius: 50%;
        box-shadow: 0 0 12px rgba(45, 245, 192, 0.8);
        top: -6px;
        left: 0;
    }

    .flow-num {
        display: block;
        font-size: 13px;
        letter-spacing: 0.06em;
        color: var(--primary);
        font-weight: 700;
        margin-bottom: 10px;
        font-variant-numeric: tabular-nums;
    }

    .flow-title {
        color: #fff;
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 6px;
    }

    .flow-text {
        color: var(--text-sub);
        font-size: 14px;
        line-height: 1.6;
    }

    /* Faq */
    .faq-layout {
        display: grid;
        grid-template-columns: 0.9fr 1.2fr;
        gap: 70px;
        align-items: start;
    }

    .faq-intro {
        position: sticky;
        top: 140px;
    }

    .faq-list {
        display: grid;
        gap: 14px;
    }

    .faq-item {
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.06);
        transition: border 0.2s ease, background 0.2s ease;
        overflow: hidden;
    }

    .faq-item[open] {
        border-color: rgba(45, 245, 192, 0.3);
        background: rgba(255, 255, 255, 0.08);
    }

    .faq-item summary {
        list-style: none;
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 18px 20px;
        color: #F3F7FB;
        font-weight: 600;
        font-size: 16px;
        cursor: pointer;
        user-select: none;
        line-height: 1.5;
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary::after {
        content: "\f067";
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        margin-left: auto;
        color: var(--text-sub);
        font-size: 14px;
        width: 28px;
        height: 28px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.06);
        flex-shrink: 0;
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .faq-item[open] summary::after {
        content: "\f068";
        color: var(--primary);
        transform: rotate(180deg);
    }

    .faq-item p {
        padding: 0 20px 20px;
        color: var(--text-sub);
        font-size: 15px;
        line-height: 1.8;
    }

    /* CTA */
    .cta-panel {
        position: relative;
        overflow: hidden;
        background:
            linear-gradient(rgba(11, 19, 34, 0.85), rgba(7, 13, 23, 0.92)),
            url("/assets/images/backpic/back-3.png") center/cover no-repeat;
        padding: 90px 0;
    }

    .cta-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }

    .cta-inner h2 {
        color: #fff;
        font-size: clamp(28px, 3.4vw, 42px);
        max-width: 620px;
        margin-bottom: 12px;
    }

    .cta-inner p {
        color: var(--text-sub);
        max-width: 620px;
    }

    .cta-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }

    .cta-actions .btn-primary {
        color: #08121A;
        border: 1px solid rgba(45, 245, 192, 0.4);
    }

    /* Footer */
    .site-footer {
        background: var(--bg-deep);
        border-top: 1px solid rgba(45, 245, 192, 0.22);
        padding-top: 80px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
        gap: 40px;
        padding-bottom: 48px;
    }

    .footer-brand p {
        color: var(--text-muted);
        font-size: 14px;
        line-height: 1.9;
        max-width: 360px;
        margin-top: 16px;
    }

    .footer-title {
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 18px;
        padding-bottom: 10px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-links {
        display: grid;
        gap: 10px;
    }

    .footer-links a {
        color: var(--text-sub);
        font-size: 14px;
        transition: color 0.2s ease, transform 0.2s ease;
    }

    .footer-links a:hover {
        color: var(--primary);
        transform: translateX(3px);
    }

    .footer-contact {
        display: grid;
        gap: 12px;
        color: var(--text-sub);
        font-size: 14px;
    }

    .footer-contact li {
        display: flex;
        gap: 10px;
        align-items: flex-start;
        font-style: normal;
    }

    .footer-contact i {
        color: var(--primary);
        margin-top: 5px;
        width: 18px;
        text-align: center;
    }

    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-block: 20px;
        color: var(--text-muted);
        font-size: 13px;
    }

    .back-top-button {
        width: 36px;
        height: 36px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.14);
        color: var(--text-sub);
        font-size: 14px;
        transition: all 0.2s ease;
    }

    .back-top-button:hover {
        color: var(--primary);
        border-color: var(--primary);
        background: rgba(45, 245, 192, 0.1);
        transform: translateY(-2px);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .desktop-nav {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: min(320px, 84vw);
            flex-direction: column;
            align-items: flex-start;
            justify-content: flex-start;
            gap: 4px;
            background: rgba(7, 13, 23, 0.97);
            padding: 100px 28px 40px;
            border-left: 1px solid rgba(255, 255, 255, 0.1);
            transform: translateX(100%);
            transition: transform 0.28s ease, visibility 0.28s;
            visibility: hidden;
            box-shadow: -20px 0 50px rgba(0, 0, 0, 0.4);
        }

        .desktop-nav.open {
            transform: none;
            visibility: visible;
        }

        .desktop-nav .nav-link {
            width: 100%;
            font-size: 17px;
            padding: 13px 12px;
            border-radius: 10px;
        }

        .header-cta {
            display: inline-flex;
            margin-left: auto;
            height: 40px;
            padding-inline: 16px;
            font-size: 14px;
        }

        .nav-toggle {
            display: inline-flex;
        }

        .hero-wrap {
            grid-template-columns: 1fr;
            gap: 40px;
        }

        .hero-media img {
            height: 340px;
        }

        .split-grid {
            grid-template-columns: 1fr;
        }

        .media-col::after {
            inset: -12px auto auto -12px;
        }

        .flow-wrap {
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .faq-layout {
            grid-template-columns: 1fr;
            gap: 48px;
        }

        .faq-intro {
            position: static;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 768px) {
        :root {
            --space-section: 72px;
        }

        .category-hero {
            padding: 64px 0 58px;
        }

        .hero-stats {
            grid-template-columns: repeat(2, 1fr);
            gap: 0;
            row-gap: 20px;
        }

        .stat-box:nth-child(3) {
            border-left: none;
            padding-left: 0;
        }

        .type-row {
            grid-template-columns: 1fr;
            gap: 10px;
            padding: 22px 6px;
        }

        .type-tag {
            justify-self: start;
        }

        .flow-wrap {
            grid-template-columns: 1fr;
        }

        .cta-inner {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 640px) {
        .header-inner {
            height: 68px;
            gap: 14px;
        }

        .brand-name {
            font-size: 18px;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            font-size: 15px;
        }

        .header-cta {
            width: 38px;
            height: 38px;
            font-size: 0;
            border-radius: 10px;
            padding: 0;
            background: rgba(45, 245, 192, 0.16);
            border: 1px solid rgba(45, 245, 192, 0.3);
        }

        .header-cta::before {
            content: "\f217";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary);
            font-size: 15px;
            line-height: 1;
        }

        .category-hero h1 {
            font-size: 42px;
            line-height: 1.1;
        }

        .hero-media img {
            height: 260px;
        }

        .hero-actions .btn,
        .cta-actions .btn {
            width: 100%;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 34px;
        }

        .footer-bottom {
            flex-direction: column-reverse;
            align-items: flex-start;
        }

        .cta-panel {
            padding: 60px 0;
        }

        .section-heading p {
            font-size: 15px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            animation-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }
    }

/* roulang page: category2 */
:root {
            --bg: #0B1322;
            --bg-soft: #101B2D;
            --bg-deep: #070D17;
            --surface: rgba(255, 255, 255, 0.06);
            --surface-hover: rgba(255, 255, 255, 0.14);
            --border: rgba(255, 255, 255, 0.12);
            --border-strong: rgba(255, 255, 255, 0.18);
            --primary: #2DF5C0;
            --primary-bright: #6DFBD6;
            --primary-dark: #07121D;
            --text-high: #E6EDF6;
            --text-mid: #A0AFC3;
            --text-low: #6B7C93;
            --amber: #F5A623;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(45, 245, 192, 0.28);
            --shadow-glow-lg: 0 0 30px rgba(45, 245, 192, 0.42);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text-high);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            background-image: radial-gradient(1200px 500px at 90% -80px, rgba(45, 245, 192, 0.05), transparent 60%);
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 44px 44px;
            mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.65), transparent 78%);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 48px;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 32px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 20px;
            }
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 19, 34, 0.84);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 76px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            position: relative;
            background: rgba(45, 245, 192, 0.06);
        }

        .logo-mark::before {
            content: "";
            position: absolute;
            inset: 8px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.55);
            border-left-color: transparent;
            border-bottom-color: transparent;
            transform: rotate(35deg);
        }

        .logo-mark::after {
            content: "";
            position: absolute;
            inset: 14px;
            border-radius: 3px;
            background: var(--primary);
            transform: rotate(45deg);
            box-shadow: 0 0 12px rgba(45, 245, 192, 0.65);
        }

        .brand-name {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.2px;
            white-space: nowrap;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 34px;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-mid);
            padding: 8px 2px;
            transition: color 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.22s ease;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .header-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .nav-toggle:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        @media (max-width: 1024px) {
            .nav-toggle {
                display: inline-flex;
            }

            .desktop-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 10px 24px 22px;
                background: rgba(11, 19, 34, 0.98);
                backdrop-filter: blur(24px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 28px 40px rgba(0, 0, 0, 0.35);
            }

            .site-header.nav-open .desktop-nav {
                display: flex;
            }

            .desktop-nav .nav-link {
                display: block;
                padding: 14px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                font-size: 16px;
            }

            .desktop-nav .nav-link:last-child {
                border-bottom: none;
            }
        }

        @media (max-width: 640px) {
            .brand-name {
                font-size: 19px;
            }

            .logo-mark {
                width: 36px;
                height: 36px;
            }

            .header-cta {
                padding: 0 16px;
                height: 40px;
                font-size: 14px;
            }
        }

        /* ===== 按钮体系 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            height: 50px;
            padding: 0 26px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
            white-space: nowrap;
        }

        .btn i {
            font-size: 15px;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--primary-dark);
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            background: var(--primary-bright);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow-lg);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(45, 245, 192, 0.3);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text-high);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
        }

        /* ===== 分类页 Hero ===== */
        .category-hero {
            position: relative;
            isolation: isolate;
            padding: 84px 0 72px;
            background:
                radial-gradient(circle at 78% 20%, rgba(45, 245, 192, 0.14), transparent 400px),
                linear-gradient(115deg, rgba(11, 19, 34, 0.94) 25%, rgba(11, 19, 34, 0.58)),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            overflow: hidden;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            right: -120px;
            bottom: -220px;
            width: 440px;
            height: 440px;
            border-radius: 50%;
            border: 1px solid rgba(45, 245, 192, 0.22);
            box-shadow: 0 0 0 46px rgba(45, 245, 192, 0.03), 0 0 0 92px rgba(45, 245, 192, 0.02);
            pointer-events: none;
            z-index: -1;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: 1.08fr 0.92fr;
            gap: 64px;
            align-items: center;
        }

        .breadcrumb {
            display: inline-flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 14px;
            color: var(--text-low);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--text-mid);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .breadcrumb-sep {
            font-size: 12px;
            color: var(--text-low);
        }

        .breadcrumb span {
            color: var(--primary);
        }

        .category-hero h1 {
            font-size: clamp(38px, 5vw, 58px);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -1px;
            color: #fff;
            margin-bottom: 20px;
        }

        .category-hero h1 .hero-underline {
            display: inline-block;
            position: relative;
        }

        .category-hero h1 .hero-underline::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 6px;
            border-radius: 6px;
            background: linear-gradient(90deg, var(--primary), rgba(45, 245, 192, 0.04));
            opacity: 0.66;
        }

        .hero-lead {
            max-width: 600px;
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-mid);
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 38px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, minmax(110px, 1fr));
            gap: 14px 30px;
            max-width: 550px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
        }

        .hero-stats strong {
            display: block;
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .hero-stats span {
            font-size: 13px;
            color: var(--text-mid);
            display: block;
            margin-top: 5px;
        }

        .hero-visual {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.14);
            box-shadow: 0 28px 70px rgba(0, 0, 0, 0.4);
            transform: rotate(0.5deg);
        }

        .hero-visual::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(150deg, transparent 46%, rgba(11, 19, 34, 0.44) 100%);
            pointer-events: none;
        }

        .hero-visual img {
            width: 100%;
            height: 430px;
            object-fit: cover;
        }

        .hero-visual-corner {
            position: absolute;
            left: 20px;
            top: 20px;
            z-index: 2;
            border-radius: 999px;
            background: rgba(11, 19, 34, 0.68);
            border: 1px solid rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-high);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .hero-visual-corner i {
            color: var(--primary);
        }

        @media (max-width: 1024px) {
            .hero-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-visual img {
                height: 340px;
            }
        }

        @media (max-width: 640px) {
            .category-hero {
                padding: 54px 0 56px;
            }

            .category-hero h1 {
                font-size: 34px;
            }

            .hero-lead {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }

            .hero-stats strong {
                font-size: 23px;
            }

            .hero-visual img {
                height: 230px;
            }

            .hero-actions {
                flex-direction: column;
            }
        }

        /* ===== 通用章节 ===== */
        .section {
            padding: 96px 0;
        }

        .section-soft {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 52px;
        }

        .section-head-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.4px;
            color: var(--primary);
            margin-bottom: 13px;
        }

        .eyebrow::before {
            content: "";
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
            box-shadow: 0 0 10px rgba(45, 245, 192, 0.5);
        }

        .section-head-center .eyebrow {
            justify-content: center;
        }

        .section-title {
            font-size: clamp(26px, 3.4vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            letter-spacing: -0.4px;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-mid);
            margin-bottom: 0;
        }

        @media (max-width: 640px) {
            .section {
                padding: 62px 0;
            }

            .section-head {
                margin-bottom: 34px;
            }
        }

        /* ===== 时间轴 ===== */
        .timeline-wrap {
            position: relative;
            margin-top: 18px;
        }

        .timeline {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 20px;
            padding-left: 0;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 23px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, rgba(45, 245, 192, 0.55), rgba(45, 245, 192, 0.08));
            border-radius: 4px;
        }

        .timeline-item {
            position: relative;
            padding-left: 74px;
            padding-bottom: 6px;
        }

        .timeline-dot {
            position: absolute;
            left: 0;
            top: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(45, 245, 192, 0.08);
            border: 1px solid rgba(45, 245, 192, 0.6);
            font-size: 17px;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 0 0 4px rgba(45, 245, 192, 0.06), 0 0 18px rgba(45, 245, 192, 0.16);
            font-variant-numeric: tabular-nums;
        }

        .timeline-body {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 22px;
            transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
        }

        .timeline-item:hover .timeline-body {
            background: var(--surface-hover);
            border-color: rgba(45, 245, 192, 0.5);
            transform: translateX(4px);
        }

        .timeline-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .timeline-body h3 span {
            display: block;
            font-size: 13px;
            font-weight: 400;
            color: var(--text-low);
            margin-top: 4px;
        }

        .timeline-body p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
        }

        @media (max-width: 640px) {
            .timeline-item {
                padding-left: 0;
                padding-top: 62px;
            }

            .timeline::before {
                left: 23px;
                top: 0;
                bottom: 0;
            }

            .timeline-dot {
                left: 0;
                top: 0;
            }

            .timeline-body h3 {
                font-size: 16px;
            }
        }

        /* ===== 课程矩阵 ===== */
        .course-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            grid-template-areas:
                "feature feature b"
                "feature feature c"
                "d e f";
            gap: 18px;
            margin-top: 14px;
        }

        .course-card {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.055);
            display: flex;
            flex-direction: column;
            transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
            min-width: 0;
        }

        .course-card:hover {
            transform: translateY(-4px);
            border-color: rgba(45, 245, 192, 0.55);
            background: rgba(255, 255, 255, 0.1);
        }

        .course-card:nth-child(1) {
            grid-area: feature;
        }

        .course-card:nth-child(2) {
            grid-area: b;
        }

        .course-card:nth-child(3) {
            grid-area: c;
        }

        .course-card:nth-child(4) {
            grid-area: d;
        }

        .course-card:nth-child(5) {
            grid-area: e;
        }

        .course-card:nth-child(6) {
            grid-area: f;
        }

        .course-card-image {
            position: relative;
            height: 190px;
            overflow: hidden;
            background: #152238;
        }

        .course-card:nth-child(1) .course-card-image {
            height: 260px;
        }

        .course-card:nth-child(6) .course-card-image {
            height: 150px;
        }

        .course-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
            filter: saturate(0.92);
        }

        .course-card:hover .course-card-image img {
            transform: scale(1.04);
        }

        .course-card-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 19, 34, 0.12) 0%, rgba(11, 19, 34, 0.28) 100%);
        }

        .course-card-body {
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .course-card-tag {
            display: inline-flex;
            align-items: center;
            width: fit-content;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(45, 245, 192, 0.1);
            border: 1px solid rgba(45, 245, 192, 0.3);
            border-radius: 999px;
            padding: 4px 10px;
            margin-bottom: 13px;
        }

        .course-card-body h3 {
            font-size: 21px;
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 9px;
        }

        .course-card:nth-child(6) .course-card-body h3 {
            font-size: 19px;
        }

        .course-card-body p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-mid);
            margin-bottom: 16px;
            flex: 1;
        }

        .course-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-high);
            transition: color 0.2s ease, gap 0.2s ease;
        }

        .course-card-link i {
            font-size: 12px;
            transition: transform 0.2s ease;
        }

        .course-card:hover .course-card-link {
            color: var(--primary);
        }

        .course-card:hover .course-card-link i {
            transform: translateX(4px);
        }

        @media (max-width: 1024px) {
            .course-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-areas:
                    "feature feature"
                    "b c"
                    "d e"
                    "f f";
            }

            .course-card:nth-child(1) .course-card-image {
                height: 260px;
            }
        }

        @media (max-width: 640px) {
            .course-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "feature"
                    "b"
                    "c"
                    "d"
                    "e"
                    "f";
            }

            .course-card:nth-child(1) .course-card-image,
            .course-card:nth-child(6) .course-card-image {
                height: 190px;
            }
        }

        /* ===== 适合人群与训练保障 ===== */
        .split-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .split-media {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.12);
            box-shadow: var(--shadow-card);
        }

        .split-media img {
            width: 100%;
            height: 460px;
            object-fit: cover;
        }

        .split-media::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(150deg, transparent 48%, rgba(11, 19, 34, 0.55) 100%);
        }

        .trust-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
            margin-top: 26px;
        }

        .trust-item {
            display: flex;
            gap: 16px;
        }

        .trust-icon {
            width: 50px;
            height: 50px;
            flex-shrink: 0;
            border-radius: 13px;
            background: rgba(45, 245, 192, 0.09);
            border: 1px solid rgba(45, 245, 192, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 19px;
        }

        .trust-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .trust-item p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-mid);
        }

        @media (max-width: 900px) {
            .split-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .split-media img {
                height: 300px;
            }
        }

        /* ===== 保障条 ===== */
        .benefit-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .benefit-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 30px 26px;
            background: transparent;
            transition: background-color 0.2s ease;
            position: relative;
            min-height: 112px;
        }

        .benefit-item + .benefit-item {
            border-left: 1px solid var(--border);
        }

        .benefit-item:hover {
            background: rgba(255, 255, 255, 0.035);
        }

        .benefit-item i {
            font-size: 24px;
            color: var(--primary);
            width: 36px;
            flex-shrink: 0;
        }

        .benefit-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }

        .benefit-item p {
            font-size: 13px;
            line-height: 1.65;
            color: var(--text-mid);
        }

        @media (max-width: 1024px) {
            .benefit-strip {
                grid-template-columns: 1fr 1fr;
            }

            .benefit-item:nth-child(2) {
                border-left: none;
            }

            .benefit-item:nth-child(n + 3) {
                border-top: 1px solid var(--border);
            }
        }

        @media (max-width: 640px) {
            .benefit-strip {
                grid-template-columns: 1fr;
            }

            .benefit-item,
            .benefit-item + .benefit-item {
                border-left: none;
                border-top: 1px solid var(--border);
                padding: 22px 14px;
            }

            .benefit-item:first-child {
                border-top: none;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 920px;
            margin: 0 auto;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            overflow: hidden;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: border-color 0.2s ease, background-color 0.2s ease;
        }

        .faq-item.active {
            border-color: rgba(45, 245, 192, 0.45);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 16px;
            text-align: left;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-high);
            transition: color 0.2s ease;
            cursor: pointer;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-mid);
            font-size: 13px;
            transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--primary);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease, opacity 0.3s ease;
            opacity: 0;
            padding-left: 24px;
            padding-right: 40px;
        }

        .faq-item.active .faq-answer {
            max-height: 420px;
            opacity: 1;
            padding-bottom: 24px;
        }

        .faq-answer-inner {
            padding-top: 4px;
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-mid);
            border-left: 2px solid rgba(45, 245, 192, 0.5);
            padding-left: 16px;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 18px 16px;
                font-size: 15px;
                gap: 12px;
            }

            .faq-answer {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== CTA 横条 ===== */
        .cta-band {
            position: relative;
            isolation: isolate;
            background:
                linear-gradient(180deg, rgba(11, 19, 34, 0.85), rgba(7, 13, 23, 0.92)),
                url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding: 90px 0;
            text-align: center;
        }

        .cta-band::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -1;
            background: radial-gradient(560px 260px at 20% 20%, rgba(45, 245, 192, 0.14), transparent 70%);
        }

        .cta-band h2 {
            font-size: clamp(25px, 3.6vw, 38px);
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .cta-band p {
            font-size: 16px;
            color: var(--text-mid);
            max-width: 660px;
            margin: 0 auto 32px;
            line-height: 1.9;
        }

        .cta-band .cta-inner {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 640px) {
            .cta-band {
                padding: 64px 0;
            }

            .cta-band .btn {
                width: 100%;
            }
        }

        /* ===== 底部页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 245, 192, 0.6), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 48px;
            padding: 68px 0 42px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 18px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-mid);
            margin-bottom: 4px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.2px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 11px;
        }

        .footer-links a {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            color: var(--text-mid);
            transition: color 0.2s ease, transform 0.2s ease;
        }

        .footer-links a::before {
            content: "›";
            font-size: 14px;
            color: var(--primary);
            opacity: 0;
            transition: opacity 0.2s ease, transform 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(2px);
        }

        .footer-links a:hover::before {
            opacity: 1;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 13px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.6;
        }

        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 22px 0;
            font-size: 13px;
            color: var(--text-low);
        }

        .back-top-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 50%;
            color: var(--text-mid);
            transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }

        .back-top-button:hover {
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
                padding-top: 52px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-top: 42px;
                padding-bottom: 26px;
            }

            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
        }

        /* ===== focus 可见性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .nav-link:focus-visible {
            outline-offset: 8px;
        }

        /* ===== 动画降级 ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category3 */
:root {
            --bg: #0B1322;
            --bg-deep: #070D17;
            --panel: rgba(255, 255, 255, 0.055);
            --panel-hover: rgba(255, 255, 255, 0.095);
            --line: rgba(255, 255, 255, 0.14);
            --line-soft: rgba(255, 255, 255, 0.07);
            --primary: #2DF5C0;
            --primary-soft: #52F0A6;
            --ink: #E6F1FF;
            --text-body: #E6EDF6;
            --text-2: #A0AFC3;
            --text-3: #6B7C93;
            --radius-card: 20px;
            --radius-box: 14px;
            --shadow: 0 14px 40px rgba(0, 0, 0, 0.24);
            --glow: 0 0 18px rgba(45, 245, 192, 0.3);
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 92px;
        }
        body {
            margin: 0;
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 44px 44px;
        }
        h1,
        h2,
        h3,
        h4,
        p,
        ul {
            margin: 0;
            padding: 0;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button,
        input {
            font-family: inherit;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 6px;
        }
        ::selection {
            background: rgba(45, 245, 192, 0.22);
            color: #fff;
        }
        .container {
            max-width: 1280px;
            margin-inline: auto;
            padding-inline: 20px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 19, 34, 0.84);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
            gap: 26px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(45, 245, 192, 0.2), rgba(255, 255, 255, 0.05));
            border: 1px solid rgba(255, 255, 255, 0.18);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            font-weight: 800;
        }
        .brand-name {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: #fff;
            white-space: nowrap;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }
        .nav-link {
            color: var(--text-2);
            font-size: 15px;
            font-weight: 500;
            line-height: 1.4;
            padding: 6px 2px;
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 2px;
            border-radius: 999px;
            background: var(--primary);
            box-shadow: 0 0 8px rgba(45, 245, 192, 0.7);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 22px;
            border-radius: 12px;
            border: 1px solid transparent;
            font-weight: 700;
            font-size: 15px;
            line-height: 1.2;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .btn-primary {
            background: var(--primary);
            color: #051018;
            box-shadow: var(--glow);
        }
        .btn-primary:hover {
            background: #5cf7cb;
            box-shadow: 0 0 26px rgba(45, 245, 192, 0.48);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(45, 245, 192, 0.3);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.24);
            color: var(--ink);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(45, 245, 192, 0.06);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            color: #fff;
            font-size: 18px;
            cursor: pointer;
        }
        .page-hero {
            background:
                linear-gradient(115deg, rgba(11, 19, 34, 0.96) 15%, rgba(11, 19, 34, 0.78) 74%, rgba(45, 245, 192, 0.05) 100%),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 140px 0 110px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }
        .hero-copy {
            max-width: 860px;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            color: var(--text-2);
            font-size: 13px;
            margin-bottom: 26px;
        }
        .breadcrumb a {
            color: var(--text-2);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        .breadcrumb .current {
            color: #fff;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.2em;
            margin-bottom: 12px;
        }
        .hero-tag::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 99px;
        }
        .page-hero h1 {
            font-size: clamp(44px, 6vw, 72px);
            line-height: 1.02;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            margin: 14px 0 22px;
        }
        .hero-sub {
            color: #C3D1E4;
            font-size: 18px;
            line-height: 1.9;
            max-width: 720px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 34px;
        }
        .hero-metrics {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 16px;
            max-width: 720px;
            margin-top: 54px;
        }
        .hero-metric {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 18px;
            backdrop-filter: blur(10px);
        }
        .hero-metric i {
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 8px;
        }
        .hero-metric strong {
            display: block;
            color: #fff;
            font-size: 16px;
            margin-bottom: 4px;
        }
        .hero-metric span {
            font-size: 13px;
            color: var(--text-2);
        }
        .section {
            padding: 110px 0;
        }
        .section-head {
            max-width: 760px;
            margin-bottom: 54px;
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.12em;
        }
        .eyebrow::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--primary);
        }
        .section-head h2 {
            font-size: clamp(30px, 4vw, 42px);
            line-height: 1.2;
            color: #fff;
            font-weight: 800;
            margin: 16px 0 16px;
        }
        .section-head .lead {
            color: var(--text-2);
            font-size: 17px;
            line-height: 1.9;
        }
        .feature-list {
            display: grid;
            gap: 32px;
        }
        .feature-item {
            display: grid;
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
        }
        @media (min-width: 992px) {
            .feature-item {
                grid-template-columns: 1fr 1fr;
                align-items: center;
            }
            .feature-item--reverse .feature-media {
                order: 2;
            }
            .feature-item--reverse .feature-copy {
                order: 1;
            }
        }
        .feature-media {
            overflow: hidden;
            min-height: 240px;
        }
        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .feature-item:hover .feature-media img {
            transform: scale(1.025);
        }
        .feature-copy {
            padding: 34px 34px 38px;
        }
        .feature-index {
            font-family: "Arial Black", Arial, sans-serif;
            font-size: 60px;
            line-height: 1;
            font-weight: 900;
            color: transparent;
            -webkit-text-stroke: 2px rgba(45, 245, 192, 0.55);
            margin-bottom: 12px;
        }
        .feature-copy h3 {
            color: #fff;
            font-size: 24px;
            line-height: 1.35;
            margin: 8px 0 14px;
        }
        .feature-copy p {
            color: var(--text-2);
            font-size: 16px;
            line-height: 1.85;
        }
        .feature-copy ul {
            margin-top: 16px;
            display: grid;
            gap: 10px;
        }
        .feature-copy ul li {
            display: flex;
            align-items: flex-start;
            gap: 9px;
            color: #C6D2E1;
            font-size: 15px;
        }
        .feature-copy ul li i {
            color: var(--primary);
            margin-top: 5px;
            font-size: 13px;
        }
        .process-section {
            background: rgba(255, 255, 255, 0.02);
            border-block: 1px solid var(--line-soft);
        }
        .steps-list {
            position: relative;
            max-width: 940px;
            padding-left: 36px;
        }
        .steps-list::before {
            content: "";
            position: absolute;
            left: 7px;
            top: 12px;
            bottom: 12px;
            width: 2px;
            background: linear-gradient(180deg, rgba(45, 245, 192, 0.5), rgba(255, 255, 255, 0.1));
        }
        .step-item {
            position: relative;
            padding: 28px 0 30px;
        }
        .step-item::before {
            content: "";
            position: absolute;
            left: -33px;
            top: 34px;
            width: 11px;
            height: 11px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 5px rgba(45, 245, 192, 0.14), 0 0 14px rgba(45, 245, 192, 0.55);
        }
        .step-title {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .step-title em {
            font-style: normal;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
        }
        .step-item p {
            color: var(--text-2);
            font-size: 15px;
            max-width: 720px;
            margin-top: 8px;
        }
        .ven-section {
            padding: 110px 0 90px;
        }
        .venue-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 26px;
        }
        .venue-card {
            grid-column: span 12;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .venue-card:hover {
            transform: translateY(-4px);
            border-color: rgba(45, 245, 192, 0.45);
            box-shadow: 0 18px 46px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(45, 245, 192, 0.06);
        }
        @media (min-width: 768px) {
            .venue-card {
                grid-column: span 6;
            }
        }
        @media (min-width: 1024px) {
            .venue-card--wide {
                grid-column: span 7;
            }
            .venue-card--normal {
                grid-column: span 5;
            }
        }
        .venue-media {
            background: #0E1829;
            overflow: hidden;
        }
        .venue-media img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .venue-card--wide .venue-media img {
            height: 320px;
        }
        .venue-card:hover .venue-media img {
            transform: scale(1.03);
        }
        .venue-body {
            padding: 24px 24px 28px;
        }
        .venue-category {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            font-weight: 700;
            background: rgba(45, 245, 192, 0.12);
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }
        .venue-body h3 {
            color: #fff;
            font-size: 23px;
            margin: 12px 0 10px;
            letter-spacing: -0.2px;
        }
        .venue-body p {
            color: var(--text-2);
            font-size: 15px;
            line-height: 1.8;
        }
        .venue-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 16px;
        }
        .venue-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: #C3D1E4;
            font-size: 14px;
        }
        .venue-meta i {
            color: var(--primary);
            font-size: 13px;
        }
        .venue-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-2);
            margin-top: 18px;
            font-size: 14px;
            font-weight: 700;
            transition: color 0.2s ease, gap 0.2s ease;
        }
        .venue-link:hover {
            color: var(--primary);
            gap: 13px;
        }
        .faq-list {
            display: grid;
            gap: 16px;
            max-width: 920px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.11);
            border-radius: 18px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }
        .faq-item[open] {
            border-color: rgba(45, 245, 192, 0.5);
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 24px;
            cursor: pointer;
            font-size: 17px;
            color: #fff;
            font-weight: 700;
            transition: color 0.2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-toggle {
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: rgba(45, 245, 192, 0.12);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform 0.2s ease;
        }
        .faq-item[open] .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-body {
            padding: 0 26px 24px;
            color: var(--text-2);
            font-size: 15px;
            line-height: 1.9;
        }
        .cta-section {
            background:
                linear-gradient(100deg, rgba(7, 13, 23, 0.88), rgba(7, 13, 23, 0.72)),
                url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            padding: 110px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
        }
        .cta-box {
            max-width: 760px;
            margin-inline: auto;
            text-align: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 24px;
            padding: 56px 46px;
            backdrop-filter: blur(12px);
        }
        .cta-box h2 {
            color: #fff;
            font-size: clamp(30px, 4.5vw, 44px);
            line-height: 1.2;
            font-weight: 800;
        }
        .cta-box p {
            color: #A7B6CA;
            font-size: 16px;
            line-height: 1.9;
            margin: 18px auto 30px;
        }
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }
        .site-footer::before {
            content: "";
            display: block;
            height: 1px;
            width: 100%;
            background: linear-gradient(90deg, transparent, rgba(45, 245, 192, 0.35), transparent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding: 66px 0 46px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-3);
            font-size: 14px;
            line-height: 1.9;
            max-width: 300px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 22px;
        }
        .footer-links {
            display: grid;
            gap: 13px;
        }
        .footer-links a {
            color: var(--text-2);
            font-size: 14px;
            transition: color 0.2s ease, transform 0.2s ease;
            display: inline-block;
        }
        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }
        .footer-contact {
            display: grid;
            gap: 15px;
            color: var(--text-2);
            font-size: 14px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 18px;
            margin-right: 6px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 22px 0;
            color: var(--text-3);
            font-size: 13px;
        }
        .back-top-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-2);
            transition: all 0.2s ease;
        }
        .back-top-button:hover {
            color: var(--primary);
            border-color: rgba(45, 245, 192, 0.5);
            transform: translateY(-3px);
        }

        @media (max-width: 1023.98px) {
            .desktop-nav {
                position: fixed;
                inset: 76px 0 0 auto;
                width: min(84vw, 340px);
                background: rgba(7, 13, 23, 0.98);
                border-left: 1px solid rgba(255, 255, 255, 0.09);
                backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                padding: 28px 24px;
                transform: translateX(105%);
                transition: transform 0.28s ease;
                overflow-y: auto;
                box-shadow: -20px 0 46px rgba(0, 0, 0, 0.35);
            }
            .desktop-nav.is-open {
                transform: translateX(0);
            }
            .desktop-nav .nav-link {
                border-radius: 12px;
                padding: 14px 18px;
                font-size: 16px;
                color: #D3DEE9;
                border: 1px solid transparent;
            }
            .desktop-nav .nav-link:hover {
                background: rgba(255, 255, 255, 0.07);
                color: var(--primary);
            }
            .desktop-nav .nav-link.active {
                color: #fff;
                background: rgba(45, 245, 192, 0.12);
                border-color: rgba(45, 245, 192, 0.22);
            }
            .desktop-nav .nav-link.active::after {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
        }

        @media (max-width: 767.98px) {
            .header-cta {
                min-height: 40px;
                padding: 9px 15px;
                font-size: 14px;
            }
            .brand-name {
                font-size: 19px;
            }
            .brand-mark {
                width: 34px;
                height: 34px;
                font-size: 18px;
            }
            .header-inner {
                gap: 12px;
            }
            .desktop-nav {
                inset-top: 72px;
            }
            .page-hero {
                padding: 90px 0 70px;
            }
            .page-hero h1 {
                font-size: clamp(40px, 13vw, 54px);
            }
            .hero-sub {
                font-size: 16px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-metrics {
                grid-template-columns: 1fr 1fr;
            }
            .hero-metric:nth-child(3) {
                grid-column: 1 / -1;
            }
            .section {
                padding: 70px 0;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .section-head .lead {
                font-size: 15px;
            }
            .feature-copy {
                padding: 28px 22px 30px;
            }
            .feature-index {
                font-size: 46px;
            }
            .feature-media {
                min-height: 190px;
            }
            .venue-media img,
            .venue-card--wide .venue-media img {
                height: 200px;
            }
            .cta-section {
                padding: 70px 0;
            }
            .cta-box {
                padding: 38px 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                padding: 50px 0 36px;
            }
            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .step-item p,
            .venue-body p {
                font-size: 14px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2DF5C0;
            --primary-bright: #52F0A6;
            --bg: #0B1322;
            --surface: rgba(255, 255, 255, 0.06);
            --surface-hover: rgba(255, 255, 255, 0.12);
            --border: rgba(255, 255, 255, 0.14);
            --border-soft: rgba(255, 255, 255, 0.08);
            --text-main: #E6EDF6;
            --text-sub: #A0AFC3;
            --text-weak: #6B7C93;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
            --container: 1280px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
        }
        img,
        a,
        button,
        input {
            -webkit-tap-highlight-color: transparent;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 48px;
            padding-right: 48px;
        }
        .container-narrow {
            max-width: 980px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        main {
            position: relative;
            z-index: 1;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 19, 34, 0.86);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-soft);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 76px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(45, 245, 192, 0.18), rgba(45, 245, 192, 0.04));
            border: 1px solid rgba(45, 245, 192, 0.4);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            position: relative;
            flex-shrink: 0;
        }
        .logo-mark::before {
            content: "";
            width: 18px;
            height: 18px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            border-top-color: transparent;
            transform: rotate(40deg);
        }
        .logo-mark::after {
            content: "";
            position: absolute;
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 2px;
            bottom: 9px;
            right: 8px;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--text-main);
            white-space: nowrap;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }
        .nav-link {
            position: relative;
            padding: 10px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 8px;
            transition: color 0.2s ease, background-color 0.2s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(45, 245, 192, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            box-shadow: 0 0 8px rgba(45, 245, 192, 0.6);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 22px;
            border-radius: 10px;
            background: var(--primary);
            color: #071410;
            font-weight: 700;
            font-size: 15px;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(45, 245, 192, 0.4);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .header-cta:hover {
            background: var(--primary-bright);
            box-shadow: 0 0 28px rgba(45, 245, 192, 0.55);
            transform: translateY(-1px);
        }
        .header-cta:active {
            transform: translateY(1px) scale(0.99);
            box-shadow: 0 0 14px rgba(45, 245, 192, 0.3);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            flex-shrink: 0;
            transition: border-color 0.2s, background-color 0.2s;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            background: rgba(45, 245, 192, 0.1);
            color: var(--primary);
        }
        .mobile-drawer {
            display: none;
            background: rgba(10, 17, 30, 0.98);
            border-top: 1px solid var(--border-soft);
            padding: 16px 20px 24px;
            position: fixed;
            inset: 76px 0 0 0;
            z-index: 99;
            backdrop-filter: blur(24px);
        }
        .mobile-drawer.open {
            display: block;
        }
        .mobile-drawer .mobile-nav-link {
            display: block;
            padding: 15px 4px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: color 0.2s;
        }
        .mobile-drawer .mobile-nav-link:hover {
            color: var(--primary);
        }
        .mobile-drawer .mobile-nav-link.active-mobile {
            color: var(--primary);
        }
        .mobile-drawer .header-cta {
            width: 100%;
            margin-top: 20px;
            height: 48px;
        }
        .category-hero {
            padding: 90px 0 60px;
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(11, 19, 34, 0.96) 30%, rgba(11, 19, 34, 0.78) 70%, rgba(11, 19, 34, 0.6));
        }
        .category-hero::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(45, 245, 192, 0.15), transparent 70%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: var(--text-sub);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 11px;
            color: var(--text-weak);
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-main);
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }
        .category-hero .hero-text {
            font-size: 18px;
            color: var(--text-sub);
            max-width: 720px;
            line-height: 1.8;
        }
        .hero-stats-row {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero-stat {
            padding-right: 30px;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat:last-child {
            border-right: none;
            padding-right: 0;
        }
        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
        }
        .hero-stat .label {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 2px;
        }
        .section-block {
            padding: 90px 0;
        }
        .section-block.tone-deep {
            background: rgba(0, 0, 0, 0.15);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.08em;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .section-label::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 680px;
            line-height: 1.8;
        }
        .overview-grid {
            display: grid;
            grid-template-columns: 11fr 5fr;
            gap: 48px;
            align-items: center;
            margin-top: 48px;
        }
        .overview-content p {
            margin-bottom: 18px;
            color: var(--text-sub);
            line-height: 1.9;
        }
        .overview-content strong {
            color: var(--text-main);
        }
        .gear-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 22px;
        }
        .gear-list-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-sub);
        }
        .gear-list-item i {
            color: var(--primary);
            font-size: 14px;
            margin-top: 5px;
            width: 20px;
            text-align: center;
        }
        .gear-list-item strong {
            color: var(--text-main);
        }
        .overview-card {
            background: linear-gradient(150deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 28px;
            position: relative;
            overflow: hidden;
        }
        .overview-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }
        .overview-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .overview-card .stat-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .overview-card .stat-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .overview-card .stat-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .overview-card .stat-name {
            font-size: 14px;
            color: var(--text-sub);
        }
        .overview-card .stat-calue {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
        }
        .number-item-layout {
            margin-top: 56px;
        }
        .number-entry {
            display: grid;
            grid-template-columns: 90px 1fr;
            gap: 32px;
            padding: 44px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }
        .number-entry:first-child {
            padding-top: 0;
        }
        .number-entry:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .number-badge {
            font-size: 56px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 2px rgba(45, 245, 192, 0.5);
            line-height: 1;
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.03em;
        }
        .number-body h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .number-body p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.85;
            max-width: 820px;
        }
        .number-body .lead-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(45, 245, 192, 0.1);
            border: 1px solid rgba(45, 245, 192, 0.25);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .guide-comparison {
            margin-top: 40px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            padding: 30px 26px;
            transition: all 0.25s ease;
            position: relative;
        }
        .guide-card:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(45, 245, 192, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .guide-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(140deg, rgba(45, 245, 192, 0.2), rgba(45, 245, 192, 0.05));
            border: 1px solid rgba(45, 245, 192, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .guide-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .guide-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
        }
        .faq-section {
            padding: 90px 0;
        }
        .faq-wrap {
            max-width: 1000px;
            margin: 0 auto;
            margin-top: 44px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item.open {
            border-color: rgba(45, 245, 192, 0.35);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 22px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            font-family: inherit;
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--text-sub);
            transition: all 0.3s ease;
        }
        .faq-item.open .faq-icon {
            background: rgba(45, 245, 192, 0.15);
            border-color: var(--primary);
            color: var(--primary);
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.9;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .cta-strip {
            padding: 80px 0;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }
        .cta-strip::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 19, 34, 0.87);
        }
        .cta-strip .container {
            position: relative;
            z-index: 2;
        }
        .cta-strip h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-main);
            text-align: center;
            margin-bottom: 14px;
        }
        .cta-strip p {
            font-size: 16px;
            color: var(--text-sub);
            text-align: center;
            max-width: 540px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            height: 48px;
            padding: 0 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            border: none;
            transition: all 0.2s ease;
            font-family: inherit;
            text-decoration: none;
        }
        .btn-primary-solid {
            background: var(--primary);
            color: #071410;
            box-shadow: 0 0 18px rgba(45, 245, 192, 0.4);
        }
        .btn-primary-solid:hover {
            background: var(--primary-bright);
            box-shadow: 0 0 30px rgba(45, 245, 192, 0.55);
            transform: translateY(-2px);
        }
        .btn-primary-solid:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(45, 245, 192, 0.3);
        }
        .btn-ghost-light {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-main);
        }
        .btn-ghost-light:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(45, 245, 192, 0.08);
            transform: translateY(-1px);
        }
        .site-footer {
            background: #070D17;
            border-top: 1px solid rgba(45, 245, 192, 0.2);
            padding: 70px 0 0;
            position: relative;
            z-index: 2;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 50px;
            padding-bottom: 50px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.9;
            margin-top: 18px;
            max-width: 280px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-sub);
            transition: color 0.2s, transform 0.2s;
        }
        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact li {
            font-size: 14px;
            color: var(--text-sub);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.7;
        }
        .footer-contact i {
            color: var(--primary);
            min-width: 18px;
            margin-top: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--text-weak);
        }
        .back-top-button {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-size: 14px;
            background: rgba(255, 255, 255, 0.04);
            transition: all 0.2s ease;
        }
        .back-top-button:hover {
            background: rgba(45, 245, 192, 0.15);
            border-color: var(--primary);
            color: var(--primary);
        }
        @media (max-width: 1280px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        @media (max-width: 1024px) {
            .container {
                padding-left: 28px;
                padding-right: 28px;
            }
            .desktop-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
                margin-left: auto;
            }
            .header-cta {
                display: none;
            }
            .mobile-drawer .header-cta {
                display: inline-flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .category-hero h1 {
                font-size: 40px;
            }
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guide-comparison {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .container-narrow {
                padding-left: 20px;
                padding-right: 20px;
            }
            .header-inner {
                height: 68px;
            }
            .mobile-drawer {
                inset: 68px 0 0 0;
            }
            .brand-name {
                font-size: 18px;
            }
            .logo-mark {
                width: 36px;
                height: 36px;
            }
            .category-hero {
                padding: 56px 0 44px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .hero-text {
                font-size: 16px;
            }
            .hero-stats-row {
                gap: 18px;
                margin-top: 28px;
            }
            .hero-stat {
                padding-right: 16px;
            }
            .hero-stat .num {
                font-size: 22px;
            }
            .section-block {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .number-entry {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 32px 0;
            }
            .number-badge {
                font-size: 38px;
                -webkit-text-stroke: 1.5px rgba(45, 245, 192, 0.5);
            }
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                padding: 18px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 18px;
            }
            .cta-strip {
                padding: 60px 0;
            }
            .cta-strip h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 34px;
                padding-bottom: 40px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 20px 0;
            }
            .guide-comparison {
                gap: 14px;
            }
            .guide-card {
                padding: 24px 20px;
            }
        }
        @media (max-width: 520px) {
            .brand-name {
                font-size: 16px;
            }
            .logo-mark {
                width: 32px;
                height: 32px;
                border-radius: 10px;
            }
            .mobile-drawer {
                padding: 16px 16px 24px;
            }
            .category-hero .hero-text {
                font-size: 15px;
                line-height: 1.75;
            }
            .hero-stats-row {
                gap: 12px;
            }
            .btn {
                width: 100%;
            }
            .overview-card {
                padding: 24px 18px;
            }
        }