/* roulang page: index */
:root {
            --bg-primary: #0A0B0D;
            --bg-secondary: #121418;
            --bg-card: #171A1F;
            --bg-hover: #1C2026;
            --brand-primary: #00E6C3;
            --brand-dark: #00c4a8;
            --brand-light: #4de0d0;
            --gold: #D9A850;
            --text-primary: #F2F5F7;
            --text-secondary: #9BA3AE;
            --text-muted: #5D6570;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --radius-card: 16px;
            --radius-small: 8px;
            --transition-base: all 0.3s ease;
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', 'Helvetica Neue', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--brand-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--brand-light);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input, select, textarea {
            font-family: inherit;
            font-size: 15px;
            outline: none;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding-left: 28px;
                padding-right: 28px;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* Navbar */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background-color: rgba(10, 11, 13, 0.85);
            border-bottom: 1px solid var(--border-default);
            transition: backdrop-filter 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
        }

        .navbar.scrolled {
            background-color: rgba(10, 11, 13, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-group {
            display: flex;
            align-items: center;
            gap: 6px;
            width: 30%;
        }

        .nav-group-left {
            justify-content: flex-start;
        }

        .nav-group-right {
            justify-content: flex-end;
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 14px;
            padding: 8px 14px;
            border-radius: 6px;
            transition: all 0.2s ease;
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: #ffffff;
            background-color: rgba(255, 255, 255, 0.04);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 2px;
            width: 0;
            height: 3px;
            background-color: var(--brand-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 20px;
        }

        .nav-link.active {
            color: #ffffff;
        }

        .logo-center {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .logo-mark {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo-mark svg {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: #ffffff;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--brand-primary);
        }

        .nav-cta {
            background-color: var(--brand-primary);
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 6px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background-color: var(--brand-light);
            color: var(--bg-primary);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            color: #ffffff;
            z-index: 101;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-default);
            padding: 16px 24px 24px;
            z-index: 99;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .nav-link-mobile {
            display: block;
            color: var(--text-secondary);
            font-size: 15px;
            padding: 12px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .mobile-menu .nav-link-mobile:hover,
        .mobile-menu .nav-link-mobile.active {
            color: var(--brand-primary);
            padding-left: 12px;
        }

        .mobile-menu .nav-cta-mobile {
            display: block;
            background-color: var(--brand-primary);
            color: var(--bg-primary);
            font-weight: 600;
            padding: 12px;
            border-radius: 8px;
            margin-top: 16px;
            text-align: center;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 680px;
            display: flex;
            align-items: center;
            padding-top: 120px;
            padding-bottom: 80px;
            background-color: var(--bg-primary);
            background-image: linear-gradient(rgba(10, 11, 13, 0.82), rgba(10, 11, 13, 0.92)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 230, 195, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 100px;
            background: linear-gradient(to top, var(--bg-primary) 0%, transparent 100%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            align-items: center;
            gap: 50px;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(0, 230, 195, 0.1);
            border: 1px solid rgba(0, 230, 195, 0.2);
            color: var(--brand-primary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 100px;
            margin-bottom: 20px;
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background-color: var(--brand-primary);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
            100% { opacity: 1; transform: scale(1); }
        }

        .hero-title {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--brand-primary);
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.6;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--brand-primary);
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 600;
            border: none;
            padding: 12px 32px;
            border-radius: 8px;
            transition: all 0.2s ease;
            min-width: 160px;
            height: 48px;
        }

        .btn-primary:hover {
            background-color: var(--brand-light);
            color: var(--bg-primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 20px rgba(0, 230, 195, 0.3);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: #ffffff;
            font-size: 15px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 12px 32px;
            border-radius: 8px;
            transition: all 0.2s ease;
            min-width: 170px;
            height: 48px;
        }

        .btn-outline:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background-color: rgba(0, 230, 195, 0.08);
            transform: translateY(-2px);
        }

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

        .hero-trust {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .trust-item svg {
            width: 16px;
            height: 16px;
            color: var(--brand-primary);
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            border: 1px solid var(--border-default);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            display: block;
        }

        .hero-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 11, 13, 0.4) 0%, transparent 40%);
        }

        /* Section common */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .section-title .highlight {
            color: var(--brand-primary);
        }

        /* Tier cards */
        .tier-section {
            background-color: var(--bg-primary);
            position: relative;
        }

        .tier-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.15fr 0.9fr;
            gap: 24px;
            align-items: flex-start;
        }

        .tier-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            transition: all 0.3s ease;
            position: relative;
        }

        .tier-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }

        .tier-card.middle {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 1px var(--brand-primary), 0 12px 40px rgba(0, 0, 0, 0.3);
            border-top: 4px solid var(--brand-primary);
            padding-top: 36px;
        }

        .tier-card.middle:hover {
            transform: translateY(-6px);
            box-shadow: 0 0 0 1px var(--brand-primary), 0 16px 48px rgba(0, 0, 0, 0.4);
        }

        .tier-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background-color: var(--gold);
            color: var(--bg-primary);
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 100px;
            letter-spacing: 0.3px;
        }

        .tier-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 22px;
        }

        .tier-icon.one {
            background-color: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
        }

        .tier-icon.two {
            background-color: rgba(0, 230, 195, 0.12);
            color: var(--brand-primary);
        }

        .tier-icon.three {
            background-color: rgba(217, 168, 80, 0.12);
            color: var(--gold);
        }

        .tier-name {
            font-size: 20px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 4px;
        }

        .tier-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .tier-divider {
            height: 1px;
            background-color: var(--border-default);
            margin-bottom: 20px;
        }

        .tier-list {
            list-style: none;
            margin-bottom: 24px;
        }

        .tier-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 10px;
            padding-left: 0;
        }

        .tier-list li::before {
            content: '';
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--brand-primary);
            flex-shrink: 0;
            margin-top: 5px;
            opacity: 0.8;
        }

        .tier-list li.muted::before {
            background-color: var(--text-muted);
            opacity: 0.4;
        }

        .tier-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-primary);
            font-size: 14px;
            font-weight: 500;
            transition: gap 0.2s ease;
        }

        .tier-link:hover {
            gap: 10px;
            color: var(--brand-light);
        }

        .tier-link svg {
            width: 14px;
            height: 14px;
        }

        /* Comparison */
        .compare-section {
            background-color: var(--bg-secondary);
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }

        .compare-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 36px;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .compare-card.highlight {
            background-color: rgba(0, 230, 195, 0.06);
            border-color: rgba(0, 230, 195, 0.25);
        }

        .compare-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background-color: var(--gold);
            color: var(--bg-primary);
            font-size: 11px;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 100px;
        }

        .compare-name {
            font-size: 20px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 6px;
        }

        .compare-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .compare-list {
            list-style: none;
            margin-bottom: 28px;
            flex: 1;
        }

        .compare-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
            font-size: 14px;
            color: var(--text-secondary);
        }

        .compare-list li:last-child {
            border-bottom: none;
        }

        .compare-list .label {
            color: var(--text-secondary);
        }

        .compare-list .value {
            color: #ffffff;
            font-weight: 500;
        }

        .compare-list .value.brand {
            color: var(--brand-primary);
        }

        .compare-list .value.gold {
            color: var(--gold);
        }

        .compare-btn {
            margin-top: auto;
            width: 100%;
        }

        /* Countdown */
        .countdown-section {
            background-image: linear-gradient(rgba(10, 11, 13, 0.9), rgba(10, 11, 13, 0.95)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 60px 0;
            position: relative;
        }

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

        .countdown-info {
            flex: 1;
            min-width: 280px;
        }

        .countdown-title {
            font-size: 24px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
        }

        .countdown-desc {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .countdown-timer {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-top: 20px;
        }

        .timer-item {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .timer-number {
            font-size: 40px;
            font-weight: 700;
            color: var(--brand-primary);
            line-height: 1;
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
            min-width: 72px;
            text-align: center;
            background-color: rgba(0, 0, 0, 0.3);
            border: 1px solid var(--border-default);
            border-radius: 10px;
            padding: 12px 8px;
        }

        .timer-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 6px;
            text-align: center;
        }

        .timer-sep {
            font-size: 32px;
            color: var(--brand-primary);
            font-weight: 300;
            margin-top: 14px;
            opacity: 0.6;
        }

        .countdown-progress-wrap {
            flex: 0.8;
            min-width: 260px;
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .progress-label .percent {
            color: var(--brand-primary);
            font-weight: 600;
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        .progress-bar {
            height: 6px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 100px;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .progress-fill {
            height: 100%;
            background-color: var(--brand-primary);
            border-radius: 100px;
            width: 76%;
        }

        .countdown-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-primary);
            font-size: 14px;
            font-weight: 500;
        }

        .countdown-link:hover {
            gap: 10px;
        }

        /* News */
        .news-section {
            background-color: var(--bg-primary);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
        }

        .news-intro {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .news-intro .section-title {
            text-align: left;
        }

        .news-intro .section-subtitle {
            text-align: left;
            margin-bottom: 24px;
        }

        .news-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-primary);
        }

        .news-more-link:hover {
            gap: 10px;
        }

        .news-list {
            list-style: none;
        }

        .news-card {
            display: flex;
            gap: 16px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 16px;
            transition: all 0.3s ease;
            margin-bottom: 16px;
        }

        .news-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .news-card-cover {
            width: 120px;
            height: 90px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background-color: var(--bg-secondary);
        }

        .news-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .news-card:hover .news-card-cover img {
            transform: scale(1.03);
        }

        .news-card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 4px;
        }

        .news-tag {
            background-color: rgba(0, 230, 195, 0.1);
            color: var(--brand-primary);
            font-size: 11px;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .news-time {
            font-size: 12px;
            color: var(--text-muted);
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        .news-card-title {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-bottom {
            display: flex;
            justify-content: flex-end;
            margin-top: 4px;
        }

        .news-read-more {
            font-size: 13px;
            color: var(--brand-primary);
            display: inline-flex;
            align-items: center;
            gap: 2px;
            transition: gap 0.2s ease;
        }

        .news-read-more:hover {
            gap: 6px;
        }

        .news-empty {
            background-color: var(--bg-card);
            border: 1px dashed var(--border-default);
            border-radius: var(--radius-card);
            padding: 60px 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 14px;
            min-height: 220px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 8px;
        }

        .news-empty svg {
            width: 36px;
            height: 36px;
            opacity: 0.4;
            margin-bottom: 8px;
        }

        /* Contact form */
        .contact-section {
            background-image: linear-gradient(rgba(10, 11, 13, 0.92), rgba(10, 11, 13, 0.96)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
        }

        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .contact-info .section-title {
            text-align: left;
        }

        .contact-info-desc {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .contact-methods {
            list-style: none;
        }

        .contact-methods li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 16px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .contact-methods svg {
            width: 18px;
            height: 18px;
            color: var(--brand-primary);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .contact-methods .label {
            color: var(--text-primary);
            font-weight: 500;
        }

        .contact-form-wrap {
            background-color: var(--bg-card);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 36px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            height: 46px;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-small);
            padding: 0 14px;
            color: var(--text-primary);
            transition: all 0.2s ease;
        }

        .form-control:focus {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 3px rgba(0, 230, 195, 0.15);
            outline: none;
        }

        .form-control::placeholder {
            color: var(--text-muted);
        }

        select.form-control {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%239BA3AE' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            cursor: pointer;
        }

        select.form-control option {
            background-color: var(--bg-card);
            color: var(--text-primary);
        }

        .btn-submit {
            width: 100%;
            height: 48px;
            background-color: var(--brand-primary);
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-small);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-submit:hover {
            background-color: var(--brand-light);
            box-shadow: 0 4px 24px rgba(0, 230, 195, 0.4);
        }

        .btn-submit::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        .btn-submit:hover::after {
            left: 100%;
        }

        .form-safe-tip {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
            text-align: center;
        }

        /* FAQ */
        .faq-section {
            background-color: var(--bg-secondary);
        }

        .faq-container {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-default);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border-default);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 8px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 500;
            color: #ffffff;
            transition: color 0.2s ease;
        }

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

        .faq-icon {
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-primary);
            font-size: 18px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 8px;
        }

        .faq-answer-inner {
            padding-bottom: 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

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

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-item.active .faq-question {
            color: var(--brand-primary);
        }

        /* CTA banner */
        .cta-banner {
            padding: 60px 0;
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(0, 230, 195, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: 28px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .cta-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Footer */
        .footer {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .logo-text {
            font-size: 18px;
            margin-bottom: 12px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: var(--brand-primary);
        }

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

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

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .footer-links a:hover {
            color: var(--brand-primary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-group {
                width: auto;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 13px;
            }
            .hero-title {
                font-size: 38px;
            }
            .tier-grid {
                grid-template-columns: 1fr 1fr;
            }
            .tier-card.middle {
                order: -1;
                grid-column: 1 / -1;
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .contact-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .navbar-inner {
                height: 64px;
            }
            .hero-section {
                min-height: auto;
                padding-top: 100px;
                padding-bottom: 60px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-trust {
                justify-content: center;
            }
            .hero-image-wrap img {
                height: 260px;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .tier-card.middle {
                order: 0;
                grid-column: auto;
            }
            .countdown-inner {
                flex-direction: column;
                text-align: center;
                align-items: flex-start;
            }
            .countdown-timer {
                justify-content: center;
                width: 100%;
            }
            .countdown-progress-wrap {
                width: 100%;
            }
            .news-card {
                flex-direction: row;
            }
            .news-card-cover {
                width: 90px;
                height: 70px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary, .btn-outline {
                width: 100%;
            }
            .timer-number {
                font-size: 28px;
                min-width: 56px;
                padding: 8px 4px;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card-cover {
                width: 100%;
                height: 120px;
            }
            .contact-form-wrap {
                padding: 24px;
            }
            .compare-card {
                padding: 24px;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 4px;
            height: 4px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--brand-primary);
            border-radius: 100px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--brand-light);
        }

        ::selection {
            background-color: rgba(0, 230, 195, 0.3);
            color: #ffffff;
        }

        /* Accessibility */
        a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
            outline: 2px solid var(--brand-primary);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --bg-dark: #0A0B0D;
            --bg-secondary: #121418;
            --bg-surface: #171A1F;
            --bg-hover: #1C2026;
            --primary: #00E6C3;
            --primary-light: #2BFFE0;
            --gold: #D9A850;
            --text-main: #F2F5F7;
            --text-secondary: #9BA3AE;
            --text-muted: #5D6570;
            --border-default: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --success: #16C79A;
            --error: #E5484D;
            --warning: #F0A63C;
            --radius-lg: 16px;
            --radius-md: 8px;
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1280px;
            --space-lg: 96px;
            --space-md: 80px;
            --space-sm: 24px;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        ul,
        ol {
            list-style-position: inside;
        }

        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 4px;
            height: 4px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-secondary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }

        /* ========== 通用容器 ========== */
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== 导航栏 ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 11, 13, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-default);
            transition: background 0.3s ease, border-color 0.3s ease;
        }

        .navbar.scrolled {
            background: rgba(10, 11, 13, 0.96);
            border-color: var(--border-hover);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }

        .nav-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }

        .nav-group-left {
            justify-content: flex-start;
        }

        .nav-group-right {
            justify-content: flex-end;
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.04);
        }

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

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

        .logo-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-mark {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            transition: opacity 0.2s ease;
        }

        .logo-mark:hover {
            opacity: 0.9;
        }

        .logo-mark svg {
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--text-main);
            line-height: 1;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--primary);
            font-weight: 700;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: var(--bg-dark);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 6px;
            margin-left: 12px;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--primary-light);
            color: var(--bg-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(0, 230, 195, 0.25);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 8px;
            color: var(--text-main);
            cursor: pointer;
            transition: border-color 0.2s ease, background 0.2s ease;
            margin-left: auto;
        }

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

        /* 移动端导航抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--bg-dark);
            border-bottom: 1px solid var(--border-default);
            padding: 16px 20px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 4px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .mobile-drawer.open {
            display: flex;
        }

        .mobile-drawer a {
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 15px;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
        }

        .mobile-drawer a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
        }

        .mobile-drawer a.active {
            background: rgba(0, 230, 195, 0.08);
            color: var(--primary);
        }

        /* ========== 响应式导航 ========== */
        @media (max-width: 1024px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .navbar-inner {
                height: 64px;
            }
            .mobile-drawer {
                top: 64px;
            }
        }

        /* ========== 文章页主体 ========== */
        .article-page {
            padding-top: 120px;
            padding-bottom: 80px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }

        .article-page::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(0, 230, 195, 0.06) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .article-page .container-custom {
            position: relative;
            z-index: 1;
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

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

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

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

        .breadcrumb .current {
            color: var(--text-secondary);
            max-width: 300px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* 文章头部 */
        .article-header {
            max-width: 860px;
            margin: 0 auto 32px;
            text-align: left;
        }

        .article-header h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-default);
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }

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

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 230, 195, 0.1);
            border: 1px solid rgba(0, 230, 195, 0.2);
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
        }

        /* 正文区域 */
        .article-content-wrap {
            max-width: 860px;
            margin: 0 auto;
            position: relative;
        }

        .article-content {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            margin-bottom: 40px;
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--text-main);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 1.8em 0 0.6em;
            color: var(--text-main);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5em;
            padding-left: 1.5em;
        }

        .article-content li {
            margin-bottom: 0.5em;
        }

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

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(0, 230, 195, 0.05);
            padding: 16px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.5em 0;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-content img {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            margin: 24px 0;
            width: 100%;
            height: auto;
        }

        .article-content figure {
            margin: 24px 0;
        }

        .article-content figcaption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }

        .article-content code {
            background: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: 4px;
            padding: 2px 8px;
            font-size: 14px;
            color: var(--primary);
        }

        .article-content pre {
            background: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 20px;
            overflow-x: auto;
            margin: 1.5em 0;
        }

        .article-content pre code {
            background: transparent;
            border: none;
            padding: 0;
            color: var(--text-main);
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border-default);
            margin: 2.5em 0;
        }

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        /* 上一篇 / 下一篇 */
        .article-pagination {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            max-width: 860px;
            margin: 0 auto 48px;
            padding: 24px 0;
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
        }

        .article-pagination a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.2s ease, transform 0.2s ease;
            padding: 8px 0;
        }

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

        .article-pagination .prev-link:hover {
            transform: translateX(-4px);
        }

        .article-pagination .next-link:hover {
            transform: translateX(4px);
        }

        /* 相关推荐 */
        .related-section {
            max-width: 1280px;
            margin: 0 auto;
            padding-top: 48px;
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .related-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            position: relative;
            padding-left: 18px;
        }

        .related-header h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .related-card-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }

        .related-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-card-cover img {
            transform: scale(1.03);
        }

        .related-card-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 11, 13, 0.4) 0%, transparent 60%);
            pointer-events: none;
        }

        .related-card-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card-body h3 a {
            color: inherit;
            transition: color 0.2s ease;
        }

        .related-card-body h3 a:hover {
            color: var(--primary);
        }

        .related-card-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-default);
        }

        .related-card-tag {
            font-size: 12px;
            color: var(--primary);
            background: rgba(0, 230, 195, 0.08);
            border-radius: 4px;
            padding: 2px 10px;
        }

        .related-card-date {
            font-size: 13px;
            color: var(--text-muted);
            font-feature-settings: "tnum";
        }

        /* 内容未找到 */
        .article-not-found {
            max-width: 720px;
            margin: 0 auto;
            padding: 80px 40px;
            text-align: center;
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
        }

        .article-not-found i {
            font-size: 48px;
            color: var(--primary);
            margin-bottom: 24px;
            display: block;
        }

        .article-not-found h2 {
            font-size: 28px;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        .back-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--bg-dark);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .back-home-btn:hover {
            background: var(--primary-light);
            color: var(--bg-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 230, 195, 0.25);
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-default);
            padding-top: 64px;
            padding-bottom: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .logo-text {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

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

        .footer-col li a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-default);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

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

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 13px;
            transition: color 0.2s ease;
        }

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

        /* ========== 响应式：文章页 ========== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-page {
                padding-top: 100px;
            }
        }

        @media (max-width: 768px) {
            .article-page {
                padding-top: 90px;
                padding-bottom: 56px;
            }
            .article-header h1 {
                font-size: 32px;
            }
            .article-content {
                padding: 32px 24px;
                font-size: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-meta {
                gap: 16px;
            }
            .breadcrumb .current {
                max-width: 180px;
            }
        }

        @media (max-width: 640px) {
            .article-header h1 {
                font-size: 28px;
            }
            .article-content-wrap {
                width: 100%;
            }
            .article-content {
                padding: 24px 16px;
                border-radius: 12px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-pagination {
                flex-direction: column;
                gap: 12px;
            }
            .article-pagination .next-link {
                justify-content: flex-end;
            }
            .breadcrumb .current {
                max-width: 140px;
            }
        }

        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 24px;
                line-height: 1.4;
            }
            .article-meta-item {
                font-size: 13px;
            }
            .related-header h2 {
                font-size: 22px;
            }
        }

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

/* roulang page: category1 */
:root {
    --bg-dark: #0A0B0D;
    --bg-surface: #121418;
    --bg-card: #171A1F;
    --bg-card-hover: #1C2026;
    --primary: #00E6C3;
    --primary-hover: #33ECD0;
    --accent: #D9A850;
    --text-main: #F2F5F7;
    --text-sub: #9BA3AE;
    --text-muted: #5D6570;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);
    --radius-card: 16px;
    --radius-sm: 8px;
    --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.35);
    --container: 1280px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", sans-serif;
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  ::selection {
    background: rgba(0, 230, 195, 0.25);
    color: #fff;
  }

  ::-webkit-scrollbar {
    width: 4px;
  }
  ::-webkit-scrollbar-track {
    background: #0A0B0D;
  }
  ::-webkit-scrollbar-thumb {
    background: #00E6C3;
    border-radius: 4px;
  }

  a {
    color: var(--primary);
    text-decoration: none;
    transition: color .25s ease;
  }
  a:hover {
    color: var(--primary-hover);
  }

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

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

  .container-custom {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
  }

  @media (max-width: 768px) {
    .container-custom {
      padding-left: 16px;
      padding-right: 16px;
    }
  }

  .section-pad {
    padding: 96px 0;
  }

  @media (max-width: 768px) {
    .section-pad {
      padding: 64px 0;
    }
  }

  .section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
  }

  .section-header .section-tag {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    background: rgba(0, 230, 195, 0.08);
    border: 1px solid rgba(0, 230, 195, 0.2);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
  }

  .section-header h2 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-main);
    margin-bottom: 12px;
  }

  .section-header p {
    font-size: 16px;
    color: var(--text-sub);
  }

  @media (max-width: 768px) {
    .section-header h2 {
      font-size: 24px;
    }
    .section-header p {
      font-size: 15px;
    }
  }

  /* ===== Navbar ===== */
  .navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 11, 13, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background .3s ease, box-shadow .3s ease;
  }

  .navbar.scrolled {
    background: rgba(10, 11, 13, 0.95);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
  }

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

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

  .desktop-nav {
    display: flex;
  }

  .nav-link {
    font-size: 14px;
    font-weight: 400;
    color: #9BA3AE;
    padding: 8px 12px;
    border-radius: 6px;
    position: relative;
    transition: color .25s ease, background .25s ease;
    white-space: nowrap;
  }

  .nav-link:hover {
    color: #F2F5F7;
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 2px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
  }

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

  .logo-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
  }

  .logo-mark {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .logo-text {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: #F2F5F7;
    line-height: 1.2;
  }

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

  .nav-cta {
    background: var(--primary);
    color: #0A0B0D;
    font-size: 14px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 6px;
    transition: background .25s ease, transform .25s ease, box-shadow .25s ease;
    white-space: nowrap;
  }

  .nav-cta:hover {
    background: var(--primary-hover);
    color: #0A0B0D;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 230, 195, 0.2);
  }

  .nav-cta:active {
    transform: translateY(0);
  }

  .mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: #F2F5F7;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
  }

  .mobile-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
  }

  .mobile-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #0A0B0D;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px 16px 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }

  .mobile-menu.open {
    display: block;
  }

  .mobile-menu .nav-link {
    display: block;
    padding: 12px 14px;
    border-radius: 8px;
    color: #9BA3AE;
    font-size: 15px;
  }

  .mobile-menu .nav-link:hover,
  .mobile-menu .nav-link.active {
    color: var(--primary);
    background: rgba(0, 230, 195, 0.06);
  }

  .mobile-menu .nav-cta {
    display: inline-block;
    margin-top: 10px;
    margin-left: 6px;
  }

  @media (max-width: 1023px) {
    .desktop-nav {
      display: none;
    }
    .mobile-toggle {
      display: block;
    }
    .logo-center {
      position: static;
      transform: none;
    }
    .navbar-inner {
      justify-content: space-between;
    }
  }

  /* ===== Buttons ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #0A0B0D;
    font-size: 15px;
    font-weight: 600;
    padding: 13px 30px;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background .25s ease, transform .25s ease, box-shadow .25s ease;
    position: relative;
    overflow: hidden;
    min-width: 160px;
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -80%;
    width: 50%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    transition: left .5s ease;
  }

  .btn-primary:hover {
    background: var(--primary-hover);
    color: #0A0B0D;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 230, 195, 0.25);
  }

  .btn-primary:hover::after {
    left: 120%;
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
  }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: #F2F5F7;
    font-size: 15px;
    font-weight: 500;
    padding: 13px 30px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    cursor: pointer;
    transition: border-color .25s ease, background .25s ease, transform .25s ease;
    min-width: 170px;
  }

  .btn-outline:hover {
    border-color: var(--primary);
    background: rgba(0, 230, 195, 0.08);
    color: var(--primary);
    transform: translateY(-2px);
  }

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

  @media (max-width: 640px) {
    .btn-primary,
    .btn-outline {
      width: 100%;
    }
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 11, 13, 0.94) 0%, rgba(10, 11, 13, 0.75) 60%, rgba(10, 11, 13, 0.45) 100%);
  }

  .hero::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle at 70% 30%, rgba(0, 230, 195, 0.15), transparent 60%);
    pointer-events: none;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
    padding: 80px 0;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--primary);
    background: rgba(0, 230, 195, 0.1);
    border: 1px solid rgba(0, 230, 195, 0.25);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
    letter-spacing: 0.3px;
  }

  .hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    display: inline-block;
  }

  .hero-title {
    font-size: 46px;
    font-weight: 700;
    line-height: 1.25;
    color: #F2F5F7;
    margin-bottom: 16px;
  }

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

  .hero-subtitle {
    font-size: 18px;
    color: var(--text-sub);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 560px;
  }

  .hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
  }

  .hero-trust {
    display: flex;
    gap: 24px;
    margin-top: 40px;
    flex-wrap: wrap;
  }

  .hero-trust span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #9BA3AE;
  }

  .hero-trust span::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    display: inline-block;
  }

  @media (max-width: 768px) {
    .hero {
      min-height: auto;
      background-position: 70% center;
    }
    .hero-content {
      padding: 60px 0;
      max-width: 100%;
    }
    .hero-title {
      font-size: 30px;
    }
    .hero-subtitle {
      font-size: 16px;
    }
    .hero-trust {
      gap: 12px 20px;
    }
    .hero::before {
      background: linear-gradient(180deg, rgba(10, 11, 13, 0.88) 0%, rgba(10, 11, 13, 0.92) 100%);
    }
  }

  /* ===== Metrics ===== */
  .metrics-section {
    padding: 72px 0;
    background: var(--bg-dark);
  }

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

  .metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 28px 24px;
    text-align: center;
    transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
  }

  .metric-card:hover {
    border-color: rgba(0, 230, 195, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .metric-value {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
    font-feature-settings: "tnum";
    margin-bottom: 6px;
  }

  .metric-label {
    font-size: 14px;
    color: var(--text-sub);
  }

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

  @media (max-width: 520px) {
    .metrics-grid {
      grid-template-columns: 1fr;
    }
    .metric-value {
      font-size: 32px;
    }
  }

  /* ===== Feature Cards ===== */
  .features-section {
    padding: 96px 0;
    background: var(--bg-surface);
    position: relative;
    overflow: hidden;
  }

  .features-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 230, 195, 0.06), transparent 70%);
    pointer-events: none;
  }

  .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 28px;
    transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
    position: relative;
  }

  .feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(0, 230, 195, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
  }

  .feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 10px;
    line-height: 1.4;
  }

  .feature-card p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.7;
  }

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

  @media (max-width: 640px) {
    .features-grid {
      grid-template-columns: 1fr;
    }
    .features-section {
      padding: 64px 0;
    }
  }

  /* ===== Scenario ===== */
  .scenario-section {
    padding: 96px 0;
    background: var(--bg-dark);
  }

  .scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .scenario-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 28px;
    transition: border-color .3s ease, transform .3s ease;
  }

  .scenario-card:hover {
    border-color: rgba(0, 230, 195, 0.3);
    transform: translateY(-4px);
  }

  .scenario-card .scenario-index {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 1px;
    margin-bottom: 16px;
    font-feature-settings: "tnum";
  }

  .scenario-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 10px;
  }

  .scenario-card p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.75;
  }

  @media (max-width: 1023px) {
    .scenario-grid {
      grid-template-columns: 1fr;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }
  }

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

  /* ===== Showcase ===== */
  .showcase-section {
    padding: 96px 0;
    background: var(--bg-surface);
  }

  .showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .showcase-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
  }

  .showcase-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .showcase-img {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #121418;
  }

  .showcase-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
  }

  .showcase-card:hover .showcase-img img {
    transform: scale(1.03);
  }

  .showcase-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(10, 11, 13, 0.4));
    pointer-events: none;
  }

  .showcase-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    background: #0A0B0D;
    color: var(--primary);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 4px;
    border: 1px solid rgba(0, 230, 195, 0.3);
  }

  .showcase-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .showcase-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.4;
  }

  .showcase-body p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .showcase-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
  }

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

  .showcase-link .arrow {
    transition: transform .25s ease;
  }

  .showcase-link:hover .arrow {
    transform: translateX(4px);
  }

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

  @media (max-width: 640px) {
    .showcase-grid {
      grid-template-columns: 1fr;
    }
    .showcase-section {
      padding: 64px 0;
    }
  }

  /* ===== Process ===== */
  .process-section {
    padding: 96px 0;
    background: var(--bg-dark);
  }

  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
  }

  .process-item {
    position: relative;
    text-align: center;
    padding: 28px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    transition: border-color .3s ease, transform .3s ease;
  }

  .process-item:hover {
    border-color: rgba(0, 230, 195, 0.25);
    transform: translateY(-4px);
  }

  .process-number {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: rgba(0, 230, 195, 0.1);
    border: 1px solid rgba(0, 230, 195, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    font-feature-settings: "tnum";
  }

  .process-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
  }

  .process-item p {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.6;
  }

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

  @media (max-width: 520px) {
    .process-grid {
      grid-template-columns: 1fr;
    }
    .process-section {
      padding: 64px 0;
    }
  }

  /* ===== FAQ ===== */
  .faq-section {
    padding: 96px 0;
    background: var(--bg-surface);
  }

  .faq-container {
    max-width: 880px;
    margin: 0 auto;
  }

  .faq-item {
    border-bottom: 1px solid var(--border);
    transition: background .3s ease;
  }

  .faq-item:first-child {
    border-top: 1px solid var(--border);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-main);
    transition: color .25s ease;
    user-select: none;
  }

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

  .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(0, 230, 195, 0.1);
    border: 1px solid rgba(0, 230, 195, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 18px;
    transition: transform .3s ease, background .3s ease;
    position: relative;
  }

  .faq-icon::before {
    content: '+';
    line-height: 1;
  }

  .faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: rgba(0, 230, 195, 0.18);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease;
  }

  .faq-answer-inner {
    padding: 0 24px 24px;
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.75;
    background: transparent;
    transition: background .3s ease;
  }

  .faq-item.active .faq-answer-inner {
    background: var(--bg-card);
    padding: 20px 24px;
    border-radius: 8px;
    margin: 0 12px 16px;
  }

  .faq-item.active .faq-answer {
    max-height: 400px;
  }

  @media (max-width: 640px) {
    .faq-section {
      padding: 64px 0;
    }
    .faq-question {
      padding: 18px 16px;
      font-size: 15px;
    }
    .faq-answer-inner {
      font-size: 14px;
    }
    .faq-item.active .faq-answer-inner {
      padding: 16px;
      margin: 0 8px 12px;
    }
  }

  /* ===== CTA Band ===== */
  .cta-band {
    position: relative;
    padding: 80px 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
  }

  .cta-band::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 11, 13, 0.95), rgba(10, 11, 13, 0.8));
  }

  .cta-band::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(rgba(0, 230, 195, 0.12) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
    opacity: 0.4;
  }

  .cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
  }

  .cta-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: #F2F5F7;
    margin-bottom: 16px;
    line-height: 1.3;
  }

  .cta-content p {
    font-size: 16px;
    color: var(--text-sub);
    margin-bottom: 32px;
    line-height: 1.7;
  }

  .cta-content .btn-primary {
    min-width: 200px;
  }

  @media (max-width: 768px) {
    .cta-band {
      padding: 56px 0;
    }
    .cta-content h2 {
      font-size: 24px;
    }
    .cta-content p {
      font-size: 15px;
    }
  }

  /* ===== Footer ===== */
  .footer {
    background: #08090B;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 64px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
  }

  .footer-brand .logo-text {
    font-size: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.75;
    max-width: 320px;
  }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #F2F5F7;
    margin-bottom: 20px;
  }

  .footer-col ul {
    list-style: none;
  }

  .footer-col ul li {
    margin-bottom: 12px;
  }

  .footer-col ul li a {
    font-size: 14px;
    color: var(--text-sub);
    transition: color .25s ease;
  }

  .footer-col ul li a:hover {
    color: var(--primary);
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    flex-wrap: wrap;
    gap: 16px;
  }

  .footer-copyright {
    font-size: 14px;
    color: var(--text-muted);
  }

  .footer-links {
    display: flex;
    gap: 24px;
  }

  .footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color .25s ease;
  }

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

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }
  }

/* roulang page: category2 */
:root {
            --bg: #0A0B0D;
            --bg-secondary: #121418;
            --surface: #171A1F;
            --surface-hover: #1C2026;
            --primary: #00E6C3;
            --primary-bright: #34F2D2;
            --primary-dark: #00BFA3;
            --accent: #D9A850;
            --text: #F2F5F7;
            --text-secondary: #9BA3AE;
            --text-muted: #5D6570;
            --border: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --radius: 16px;
            --radius-sm: 8px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--bg);
            color: var(--text);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }
        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (max-width: 640px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navbar */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 11, 13, 0.72);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            transition: background .3s ease, border-color .3s ease;
        }
        .navbar.scrolled {
            background: rgba(10, 11, 13, 0.88);
            border-bottom-color: var(--border-hover);
        }
        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
            position: relative;
        }
        .nav-group {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-group-left {
            flex: 1;
            justify-content: flex-start;
        }
        .nav-group-right {
            flex: 1;
            justify-content: flex-end;
            gap: 20px;
        }
        .nav-link {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: .2px;
            position: relative;
            transition: color .25s;
            padding: 8px 2px;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width .3s;
            border-radius: 2px;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 24px;
        }
        .nav-link.active {
            color: #fff;
        }
        .logo-center {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .logo-mark {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 600;
            letter-spacing: .5px;
            color: var(--text);
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-cta {
            background: var(--primary);
            color: #0A0B0D !important;
            font-size: 14px;
            font-weight: 700;
            border-radius: 6px;
            padding: 8px 18px;
            transition: background .25s, transform .2s, box-shadow .25s;
            white-space: nowrap;
            display: inline-block;
        }
        .nav-cta:hover {
            background: var(--primary-bright);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 230, 195, 0.25);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 8px;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            cursor: pointer;
            transition: border-color .2s;
        }
        .mobile-toggle:hover {
            border-color: var(--primary);
        }
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #0C0E12;
                border-bottom: 1px solid var(--border);
                padding: 16px 24px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .desktop-nav.nav-open {
                display: flex;
            }
            .nav-group-left {
                z-index: 60;
            }
            .nav-group-right {
                z-index: 60;
            }
            .navbar.nav-open .desktop-nav {
                display: flex;
            }
            .navbar .desktop-nav {
                display: none;
            }
            .navbar.nav-open .desktop-nav {
                display: flex;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .nav-link,
            .nav-cta {
                width: 100%;
                padding: 10px 8px;
                border-radius: 6px;
            }
            .nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .nav-link.active::after {
                width: 0;
            }
        }
        @media (max-width: 560px) {
            .logo-text {
                font-size: 16px;
            }
            .nav-cta {
                display: none;
            }
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #0A0B0D;
            font-weight: 700;
            font-size: 15px;
            border: 1px solid transparent;
            border-radius: 8px;
            padding: 12px 28px;
            cursor: pointer;
            transition: background .3s, transform .2s, box-shadow .3s;
        }
        .btn-primary:hover {
            background: var(--primary-bright);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 230, 195, 0.2);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--border-hover);
            border-radius: 8px;
            padding: 12px 28px;
            cursor: pointer;
            transition: border-color .3s, background .3s, transform .2s;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(0, 230, 195, 0.08);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* Hero */
        .page-hero {
            position: relative;
            padding: 150px 0 80px;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 11, 13, 0.94) 0%, rgba(10, 11, 13, 0.8) 45%, rgba(10, 11, 13, 0.55) 100%);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(0, 230, 195, 0.12) 1px, transparent 1px);
            background-size: 28px 28px;
            opacity: .5;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 56px;
            align-items: center;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 14px;
            background: rgba(0, 230, 195, 0.08);
            border: 1px solid rgba(0, 230, 195, 0.18);
            border-radius: 999px;
            padding: 6px 18px;
        }
        .hero-title {
            font-size: 46px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: .5px;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 480px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .hero-trust {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .hero-trust i {
            color: var(--primary);
            font-size: 15px;
        }
        .status-card {
            background: rgba(23, 26, 31, 0.72);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            position: relative;
        }
        .status-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 28px;
            right: 28px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            border-radius: 2px;
        }
        .status-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 22px;
        }
        .status-header h3 {
            font-size: 18px;
            font-weight: 600;
        }
        .live-badge {
            background: rgba(0, 230, 195, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            border: 1px solid rgba(0, 230, 195, 0.2);
        }
        .status-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-bottom: 24px;
        }
        .status-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: border-color .2s, background .2s;
        }
        .status-item:hover {
            border-color: var(--border-hover);
            background: var(--surface);
        }
        .status-item .tag {
            background: rgba(0, 230, 195, 0.1);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 6px;
            padding: 2px 8px;
        }
        .status-item .tag.gold {
            background: rgba(217, 168, 80, 0.12);
            color: var(--accent);
        }
        .status-progress {
            background: var(--bg-secondary);
            border-radius: 10px;
            padding: 16px;
        }
        .status-progress .label-row {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }
        .progress-track {
            height: 6px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 999px;
            overflow: hidden;
        }
        .progress-track span {
            display: block;
            height: 100%;
            background: linear-gradient(90deg, var(--primary-dark), var(--primary));
            border-radius: 999px;
        }
        @media (max-width: 1023px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-title {
                font-size: 36px;
            }
        }
        @media (max-width: 640px) {
            .page-hero {
                padding: 110px 0 56px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-trust {
                gap: 14px;
            }
            .status-card {
                padding: 20px;
            }
        }

        /* Stats band */
        .stats-band {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 36px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 230, 195, 0.08);
            border: 1px solid rgba(0, 230, 195, 0.14);
            color: var(--primary);
            font-size: 20px;
            flex-shrink: 0;
        }
        .stat-num {
            font-size: 30px;
            font-weight: 700;
            color: var(--text);
            font-feature-settings: "tnum";
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 2px;
        }
        @media (max-width: 1023px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Platform section */
        .platform-section {
            padding: 96px 0;
            background: var(--bg);
        }
        .section-head {
            margin-bottom: 48px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
        }
        .section-head .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
        }
        .section-head .section-desc {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 420px;
            margin-top: 8px;
        }
        .section-head .section-more {
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: gap .3s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .section-head .section-more:hover {
            gap: 10px;
        }
        .match-types-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .match-type-card {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: transform .3s, border-color .3s, box-shadow .3s;
        }
        .match-type-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
        }
        .match-type-card.large {
            grid-column: span 2;
            grid-row: span 2;
        }
        .match-type-card .card-media {
            position: relative;
            overflow: hidden;
        }
        .match-type-card.large .card-media {
            height: 260px;
        }
        .match-type-card:not(.large) .card-media {
            height: 150px;
        }
        .match-type-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .match-type-card:hover .card-media img {
            transform: scale(1.04);
        }
        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(10, 11, 13, 0.85);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 6px;
            padding: 4px 10px;
            border: 1px solid rgba(0, 230, 195, 0.15);
            z-index: 2;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }
        .card-body .card-tags span {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 12px;
            border-radius: 999px;
            padding: 3px 12px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: gap .3s;
        }
        .card-link:hover {
            gap: 10px;
        }
        @media (max-width: 1023px) {
            .match-types-grid {
                grid-template-columns: 1fr;
            }
            .match-type-card.large {
                grid-column: span 1;
                grid-row: span 1;
            }
            .match-type-card.large .card-media {
                height: 190px;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 640px) {
            .platform-section {
                padding: 64px 0;
            }
            .section-head .section-title {
                font-size: 26px;
            }
        }

        /* Features */
        .feature-section {
            padding: 96px 0;
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }
        .feature-section::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 230, 195, 0.06), transparent 70%);
            pointer-events: none;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 36px 28px;
            transition: transform .3s, border-color .3s, box-shadow .3s;
            position: relative;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
        }
        .feature-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 2px;
            margin-bottom: 8px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 230, 195, 0.08);
            border: 1px solid rgba(0, 230, 195, 0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
        }
        @media (max-width: 1023px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-section {
                padding: 64px 0;
            }
        }

        /* Scenario */
        .scenario-section {
            padding: 96px 0;
            background: var(--bg);
        }
        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color .3s;
        }
        .scenario-row:hover {
            border-color: var(--border-hover);
        }
        .scenario-row.reverse .scenario-media {
            order: 2;
        }
        .scenario-media {
            overflow: hidden;
            height: 280px;
        }
        .scenario-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .scenario-row:hover .scenario-media img {
            transform: scale(1.03);
        }
        .scenario-content {
            padding: 32px;
        }
        .scenario-content .step-badge {
            display: inline-block;
            background: rgba(0, 230, 195, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 6px;
            padding: 4px 12px;
            margin-bottom: 16px;
        }
        .scenario-content h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .scenario-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        @media (max-width: 1023px) {
            .scenario-row,
            .scenario-row.reverse {
                grid-template-columns: 1fr;
            }
            .scenario-row.reverse .scenario-media {
                order: 0;
            }
            .scenario-media {
                height: 220px;
            }
            .scenario-section {
                padding: 64px 0;
            }
        }

        /* Steps */
        .steps-section {
            padding: 96px 0;
            background: var(--bg-secondary);
            position: relative;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 32px 24px;
            position: relative;
            transition: transform .3s, border-color .3s;
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
        }
        .step-num {
            font-size: 42px;
            font-weight: 700;
            color: rgba(0, 230, 195, 0.15);
            line-height: 1;
            margin-bottom: 18px;
            font-feature-settings: "tnum";
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 1023px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-section {
                padding: 64px 0;
            }
        }
        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-section {
            padding: 96px 0;
            background: var(--bg);
        }
        .faq-container {
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0 48px;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            position: relative;
        }
        .faq-item:nth-last-child(-n+2) {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 0;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: color .25s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--border-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform .3s, background .3s, border-color .3s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 230, 195, 0.1);
            border-color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 22px;
        }
        @media (max-width: 1023px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .faq-item:nth-last-child(n+2) {
                border-bottom: 1px solid var(--border);
            }
            .faq-item:last-child {
                border-bottom: none;
            }
            .faq-section {
                padding: 64px 0;
            }
        }

        /* CTA */
        .cta-section {
            position: relative;
            padding: 96px 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 11, 13, 0.96) 30%, rgba(10, 11, 13, 0.72) 100%);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .cta-info h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .cta-info h2 span {
            color: var(--primary);
        }
        .cta-info>p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 420px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .cta-contact-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .cta-contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 15px;
        }
        .cta-contact-item i {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(0, 230, 195, 0.08);
            border: 1px solid rgba(0, 230, 195, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
            font-size: 14px;
        }
        .cta-form-wrap {
            background: rgba(23, 26, 31, 0.9);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 32px;
            backdrop-filter: blur(8px);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            height: 46px;
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            color: var(--text);
            padding: 0 14px;
            outline: none;
            transition: border-color .25s, box-shadow .25s;
            appearance: none;
            -webkit-appearance: none;
        }
        .form-group input:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 230, 195, 0.15);
        }
        .form-group select {
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8" viewBox="0 0 12 8"><path d="M1 1l5 5 5-5" stroke="%23fff" stroke-width="1.5" fill="none" stroke-linecap="round"/></svg>');
            background-repeat: no-repeat;
            background-position: right 14px center;
        }
        .form-group select option {
            background: var(--surface);
            color: var(--text);
        }
        .form-submit {
            width: 100%;
            height: 48px;
            background: var(--primary);
            color: #0A0B0D;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: background .3s, transform .2s;
        }
        .form-submit:hover {
            background: var(--primary-bright);
            transform: translateY(-1px);
        }
        .form-submit::after {
            content: "";
            position: absolute;
            top: 0;
            left: -80%;
            width: 50%;
            height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
            transform: skewX(-20deg);
            transition: left .5s;
        }
        .form-submit:hover::after {
            left: 130%;
        }
        .form-tip {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: center;
        }
        .form-success {
            display: none;
            text-align: center;
            padding: 24px 0;
        }
        .form-success.show {
            display: block;
        }
        .form-success i {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .form-success p {
            color: var(--text-secondary);
            font-size: 15px;
        }
        @media (max-width: 1023px) {
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-info h2 {
                font-size: 28px;
            }
        }
        @media (max-width: 640px) {
            .cta-form-wrap {
                padding: 24px 20px;
            }
        }

        /* Footer */
        .footer {
            background: #0C0E12;
            border-top: 1px solid var(--border);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 360px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            color: var(--text);
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .25s, padding-left .25s;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-copyright {
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            gap: 24px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .25s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 4px;
            height: 4px;
        }
        ::-webkit-scrollbar-track {
            background: #0A0B0D;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-bright);
        }

        /* utility */
        .section-head-center {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head-center .section-title {
            font-size: 32px;
            font-weight: 700;
        }
        .section-head-center .section-desc {
            color: var(--text-secondary);
            font-size: 15px;
            margin-top: 10px;
        }
        .grid-pattern {
            background-image: radial-gradient(rgba(0, 230, 195, 0.1) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .text-primary {
            color: var(--primary) !important;
        }
        .text-secondary-custom {
            color: var(--text-secondary) !important;
        }

/* roulang page: category3 */
:root {
            --bg: #0A0B0D;
            --bg-secondary: #121418;
            --card-bg: #171A1F;
            --card-hover: #1C2026;
            --brand: #00E6C3;
            --brand-hover: #00B8A0;
            --gold: #D9A850;
            --text-main: #F2F5F7;
            --text-sub: #9BA3AE;
            --text-dim: #5D6570;
            --border: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --radius-lg: 16px;
            --radius-md: 8px;
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--brand-hover);
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* ===== 导航 ===== */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: color-mix(in srgb, #0A0B0D 82%, transparent);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-group {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-group-left {
            justify-content: flex-start;
        }

        .nav-group-right {
            justify-content: flex-end;
            gap: 8px;
        }

        .logo-center {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-mark {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-main);
            font-weight: 600;
            letter-spacing: 0.5px;
            font-size: 18px;
            white-space: nowrap;
        }

        .logo-mark .logo-text span {
            color: var(--brand);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--text-sub);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 6px;
            transition: all 0.2s ease;
            position: relative;
            text-decoration: none;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background: var(--brand);
            color: var(--bg);
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.2s ease;
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            background: var(--brand-hover);
            color: var(--bg);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu {
            display: none;
            border-top: 1px solid var(--border);
            background: var(--bg);
            padding: 12px 16px 20px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .nav-link,
        .mobile-menu .nav-cta {
            display: flex;
            width: 100%;
            padding: 12px 14px;
            font-size: 15px;
            border-radius: 8px;
            margin-bottom: 4px;
        }

        .mobile-menu .nav-cta {
            justify-content: center;
            margin-top: 8px;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--brand);
            color: var(--bg);
            font-size: 15px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: 8px;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover {
            background: var(--brand-hover);
            color: var(--bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 230, 195, 0.25);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
            padding: 14px 28px;
            border-radius: 8px;
            text-decoration: none;
            border: 1px solid var(--border-hover);
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(0, 230, 195, 0.08);
            transform: translateY(-2px);
        }

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

        /* ===== 区块 ===== */
        .section {
            padding: 96px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(0, 230, 195, 0.1);
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-sub);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-image: linear-gradient(90deg, rgba(10, 11, 13, 0.94) 0%, rgba(10, 11, 13, 0.85) 55%, rgba(10, 11, 13, 0.7) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 80px 0;
            border-bottom: 1px solid var(--border);
        }

        .hero-inner {
            width: 100%;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(0, 230, 195, 0.12);
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-content h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .hero-content h1 .highlight {
            color: var(--brand);
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-sub);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.7;
        }

        .hero-ctas {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .hero-metrics {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-sub);
        }

        .hero-metrics span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .hero-metrics .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            display: inline-block;
        }

        /* ===== 活动类型 ===== */
        .activities-section {
            background: var(--bg);
        }

        .tier-grid {
            display: grid;
            grid-template-columns: 1fr 1.15fr 1fr;
            gap: 24px;
            align-items: start;
        }

        .tier-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all 0.3s ease;
            position: relative;
        }

        .tier-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            background: var(--card-hover);
        }

        .tier-card.tier-left {
            margin-top: 24px;
        }

        .tier-card.tier-right {
            margin-top: 24px;
        }

        .tier-card.tier-center {
            background: var(--bg-secondary);
            border-color: rgba(0, 230, 195, 0.4);
            padding-top: 40px;
            padding-bottom: 40px;
            box-shadow: 0 4px 32px rgba(0, 230, 195, 0.08);
        }

        .tier-card.tier-center:hover {
            border-color: var(--brand);
            box-shadow: 0 12px 40px rgba(0, 230, 195, 0.12);
        }

        .tier-topbar {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--brand);
            border-radius: 16px 16px 0 0;
        }

        .tier-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .tier-divider {
            width: 40px;
            height: 1px;
            background: var(--border-hover);
            margin-bottom: 24px;
        }

        .tier-list {
            margin-bottom: 28px;
        }

        .tier-list li {
            position: relative;
            padding-left: 20px;
            color: var(--text-sub);
            font-size: 15px;
            margin-bottom: 10px;
        }

        .tier-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand);
            opacity: 0.7;
        }

        .tier-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .tier-link:hover {
            gap: 10px;
            color: var(--brand-hover);
        }

        .tier-link span {
            transition: transform 0.2s ease;
        }

        .tier-link:hover span {
            transform: translateX(3px);
        }

        /* ===== 热门活动 ===== */
        .hot-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .hot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .hot-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .hot-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .hot-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: #0d0f12;
        }

        .hot-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .hot-card:hover .hot-cover img {
            transform: scale(1.03);
        }

        .hot-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(0, 0, 0, 0.75);
            color: var(--brand);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 6px;
            letter-spacing: 0.5px;
        }

        .hot-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .hot-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .hot-body p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }

        .hot-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            font-size: 13px;
            color: var(--text-dim);
        }

        .hot-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--brand);
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .hot-link:hover {
            gap: 8px;
            color: var(--brand-hover);
        }

        /* ===== 流程 ===== */
        .process-section {
            background: var(--bg);
        }

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

        .process-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: left;
            transition: all 0.3s ease;
            position: relative;
        }

        .process-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .process-num {
            font-size: 40px;
            font-weight: 700;
            color: rgba(0, 230, 195, 0.2);
            line-height: 1;
            margin-bottom: 16px;
            font-feature-settings: "tnum";
        }

        .process-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
        }

        /* ===== 数据指标 ===== */
        .metrics-section {
            background: linear-gradient(135deg, rgba(0, 230, 195, 0.06), rgba(10, 11, 13, 0)),
                url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }

        .metric-item {
            padding: 20px 8px;
        }

        .metric-value {
            font-size: 44px;
            font-weight: 700;
            color: var(--brand);
            line-height: 1.2;
            margin-bottom: 8px;
            font-feature-settings: "tnum";
        }

        .metric-value span {
            font-size: 24px;
            font-weight: 600;
            margin-left: 2px;
            vertical-align: super;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-sub);
            letter-spacing: 1px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
            padding-bottom: 96px;
        }

        .faq-list {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            padding: 24px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            cursor: pointer;
            text-align: left;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-icon {
            font-size: 22px;
            color: var(--brand);
            font-weight: 400;
            transition: transform 0.3s ease;
            display: inline-block;
            flex-shrink: 0;
            margin-left: 16px;
            width: 24px;
            text-align: center;
            line-height: 1;
        }

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

        .faq-answer {
            display: none;
            padding: 0 24px 24px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
            background: var(--bg-secondary);
            border-radius: 8px;
            margin: 0 8px 16px;
        }

        .faq-answer.show {
            display: block;
            padding: 20px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 80px 0;
        }

        .cta-box {
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-box p {
            font-size: 17px;
            color: var(--text-sub);
            margin-bottom: 32px;
        }

        .cta-buttons {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #060708;
            border-top: 1px solid var(--border);
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .logo-text {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            text-decoration: none;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-sub);
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--brand);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copyright {
            font-size: 14px;
            color: var(--text-dim);
        }

        .footer-links {
            display: flex;
            gap: 24px;
        }

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

        .footer-links a:hover {
            color: var(--brand);
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: #0d0f12;
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(0, 230, 195, 0.4);
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 230, 195, 0.6);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .navbar-inner {
                height: 64px;
            }

            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }

            .hero-section {
                min-height: auto;
                padding: 60px 0;
                background-image: linear-gradient(180deg, rgba(10, 11, 13, 0.92), rgba(10, 11, 13, 0.85)), url('/assets/images/backpic/back-2.webp');
            }

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

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

            .tier-card.tier-left {
                margin-top: 0;
            }

            .tier-card.tier-right {
                margin-top: 0;
            }

            .tier-card.tier-center {
                grid-column: 1 / -1;
                margin-top: 0;
            }

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

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

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 64px 0;
            }

            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .hero-content h1 {
                font-size: 32px;
                line-height: 1.3;
            }

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

            .hero-ctas {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-ctas .btn-primary,
            .hero-ctas .btn-outline {
                justify-content: center;
                width: 100%;
            }

            .hero-metrics {
                gap: 16px;
                font-size: 13px;
            }

            .tier-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .tier-card.tier-center {
                grid-column: auto;
            }

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

            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .process-item {
                padding: 24px 20px;
            }

            .process-num {
                font-size: 32px;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .metric-value {
                font-size: 34px;
            }

            .metric-value span {
                font-size: 18px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .cta-box h2 {
                font-size: 26px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-buttons .btn-primary,
            .cta-buttons .btn-outline {
                justify-content: center;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: auto;
            }

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