/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --primary: #E53935;
            --primary-dark: #B71C1C;
            --primary-light: #FF5252;
            --accent-gold: #FFB300;
            --accent-gold-light: #FFD54F;
            --dark-bg: #0D1B2A;
            --dark-bg-light: #152233;
            --dark-bg-card: #1B2D42;
            --text-dark: #1A1A2E;
            --text-body: #2D3436;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --white: #FFFFFF;
            --bg-light: #F8F9FB;
            --bg-section: #F0F2F5;
            --border: #E5E7EB;
            --border-light: #F0F0F0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.16), 0 8px 20px rgba(0,0,0,0.08);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 68px;
        }

        /* ========== 基础 Reset 与全局 ========== */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--white);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover, a:focus {
            color: var(--primary);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: var(--font-body);
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            line-height: 1.3;
            margin-top: 0;
            color: var(--text-dark);
        }
        h1 { font-size: 2.75rem; font-weight: 800; letter-spacing: -0.02em; }
        h2 { font-size: 2.1rem; font-weight: 700; letter-spacing: -0.01em; }
        h3 { font-size: 1.45rem; font-weight: 600; }
        h4 { font-size: 1.2rem; font-weight: 600; }
        p { margin-top: 0; margin-bottom: 1rem; }
        ul, ol { padding-left: 1.2rem; margin-top: 0; }

        /* ========== 容器 ========== */
        .custom-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 640px) {
            .custom-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== 板块间距 ========== */
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 52px 0;
            }
        }
        @media (max-width: 520px) {
            .section-padding {
                padding: 40px 0;
            }
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(13, 27, 42, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(13, 27, 42, 0.98);
            box-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--white);
            white-space: nowrap;
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .nav-logo:hover, .nav-logo:focus {
            color: var(--accent-gold);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--white);
            flex-shrink: 0;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links-desktop li a {
            display: inline-block;
            padding: 8px 18px;
            color: rgba(255,255,255,0.82);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links-desktop li a:hover,
        .nav-links-desktop li a:focus {
            color: var(--white);
            background: rgba(255,255,255,0.1);
        }
        .nav-links-desktop li a.nav-active {
            color: var(--white);
            background: var(--primary);
            font-weight: 600;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 0.93rem;
            border-radius: var(--radius-full);
            border: none;
            transition: all var(--transition-smooth);
            text-decoration: none;
            white-space: nowrap;
            margin-left: 10px;
        }
        .nav-cta-btn:hover, .nav-cta-btn:focus {
            background: var(--primary-dark);
            color: var(--white);
            box-shadow: 0 4px 16px rgba(229,57,53,0.4);
            transform: translateY(-1px);
        }
        /* 移动端导航按钮 */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-nav-toggle:hover {
            background: rgba(255,255,255,0.1);
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13,27,42,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            padding: 24px 20px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            display: block;
            padding: 14px 20px;
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            font-weight: 500;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.nav-active {
            background: rgba(255,255,255,0.1);
            color: var(--white);
        }
        .mobile-nav-panel a.nav-active {
            background: var(--primary);
            font-weight: 600;
        }
        .mobile-nav-cta {
            margin-top: 16px;
            display: block;
            text-align: center;
            padding: 14px 24px;
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-full);
            text-decoration: none;
            transition: all var(--transition-smooth);
        }
        .mobile-nav-cta:hover {
            background: var(--primary-dark);
            color: var(--white);
        }
        @media (max-width: 768px) {
            .nav-links-desktop, .nav-cta-btn {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 1.05rem;
            }
            .nav-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .header-inner {
                padding: 0 14px;
            }
        }

        /* ========== Hero 首屏 ========== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--dark-bg);
            overflow: hidden;
            padding-top: var(--nav-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.45;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13,27,42,0.75) 0%, rgba(13,27,42,0.55) 40%, rgba(13,27,42,0.8) 100%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 780px;
            padding: 40px 20px;
        }
        .hero-status-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(16,185,129,0.18);
            border: 1px solid rgba(16,185,129,0.4);
            color: #10B981;
            font-size: 0.88rem;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            margin-bottom: 24px;
            animation: pulse-status 2s ease-in-out infinite;
        }
        .hero-status-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #10B981;
            box-shadow: 0 0 10px #10B981, 0 0 24px rgba(16,185,129,0.6);
        }
        @keyframes pulse-status {
            0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.35); }
            50% { box-shadow: 0 0 0 14px rgba(16,185,129,0); }
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--white);
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            line-height: 1.2;
            text-shadow: 0 4px 30px rgba(0,0,0,0.35);
        }
        .hero-title .highlight {
            color: var(--accent-gold);
            position: relative;
        }
        .hero-subtitle {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.78);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 580px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            background: var(--primary);
            color: var(--white);
            font-weight: 700;
            font-size: 1.08rem;
            border-radius: var(--radius-full);
            border: none;
            transition: all var(--transition-smooth);
            text-decoration: none;
            box-shadow: 0 6px 24px rgba(229,57,53,0.4);
        }
        .btn-primary-hero:hover, .btn-primary-hero:focus {
            background: #FF3D00;
            color: var(--white);
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(229,57,53,0.55);
        }
        .btn-outline-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 15px 34px;
            background: transparent;
            color: var(--white);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: var(--radius-full);
            border: 2px solid rgba(255,255,255,0.4);
            transition: all var(--transition-smooth);
            text-decoration: none;
        }
        .btn-outline-hero:hover, .btn-outline-hero:focus {
            border-color: var(--white);
            background: rgba(255,255,255,0.08);
            color: var(--white);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
            .btn-primary-hero, .btn-outline-hero {
                padding: 14px 28px;
                font-size: 0.98rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.85rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-status-badge {
                font-size: 0.8rem;
                padding: 6px 14px;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 12px;
            }
            .btn-primary-hero, .btn-outline-hero {
                width: 100%;
                justify-content: center;
                padding: 14px 20px;
                font-size: 0.95rem;
            }
        }

        /* ========== 板块标题 ========== */
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: rgba(229,57,53,0.08);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.65rem;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-desc {
                font-size: 0.93rem;
            }
        }

        /* ========== 核心优势板块 ========== */
        .advantages-section {
            background: var(--white);
        }
        .advantage-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            text-align: center;
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .advantage-icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .advantage-icon-wrap.icon-red {
            background: rgba(229,57,53,0.1);
            color: var(--primary);
        }
        .advantage-icon-wrap.icon-gold {
            background: rgba(255,179,0,0.12);
            color: #E6A800;
        }
        .advantage-icon-wrap.icon-blue {
            background: rgba(30,100,220,0.1);
            color: #1E64DC;
        }
        .advantage-icon-wrap.icon-green {
            background: rgba(16,185,129,0.1);
            color: #10B981;
        }
        .advantage-card h3 {
            font-size: 1.18rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .advantage-card p {
            font-size: 0.93rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .advantage-card {
                padding: 26px 20px;
            }
        }

        /* ========== 赛事预告板块 ========== */
        .schedule-section {
            background: var(--bg-light);
        }
        .match-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            border: 1px solid var(--border);
            transition: all var(--transition-smooth);
            height: 100%;
        }
        .match-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .match-time-block {
            flex-shrink: 0;
            text-align: center;
            min-width: 64px;
        }
        .match-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .match-time {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .match-info-block {
            flex: 1;
            min-width: 0;
        }
        .match-teams {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-dark);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .match-venue {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .match-status-tag {
            flex-shrink: 0;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 700;
            white-space: nowrap;
        }
        .tag-upcoming {
            background: #FFF3E0;
            color: #E65100;
        }
        .tag-live {
            background: #E8F5E9;
            color: #2E7D32;
            animation: pulse-tag 1.8s ease-in-out infinite;
        }
        @keyframes pulse-tag {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.65; }
        }
        @media (max-width: 640px) {
            .match-card {
                flex-wrap: wrap;
                gap: 10px;
                padding: 18px 16px;
            }
            .match-time {
                font-size: 1.25rem;
            }
            .match-teams {
                font-size: 0.95rem;
            }
        }

        /* ========== 数据统计板块 ========== */
        .stats-section {
            background: var(--dark-bg);
            color: var(--white);
        }
        .stats-section .section-title {
            color: var(--white);
        }
        .stats-section .section-desc {
            color: rgba(255,255,255,0.65);
        }
        .stats-section .section-label {
            background: rgba(255,255,255,0.1);
            color: var(--accent-gold);
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-gold);
            line-height: 1;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }
        .stat-suffix {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-gold);
        }
        .stat-label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stat-number {
                font-size: 2.2rem;
            }
            .stat-suffix {
                font-size: 1.2rem;
            }
        }
        @media (max-width: 520px) {
            .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ========== 直播特色板块 ========== */
        .features-section {
            background: var(--white);
        }
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .feature-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .feature-card-body {
            padding: 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.6;
        }
        .feature-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            transition: gap var(--transition-fast);
        }
        .feature-card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .feature-card-img {
                height: 170px;
            }
        }
        @media (max-width: 520px) {
            .feature-card-img {
                height: 180px;
            }
        }

        /* ========== 观看指南板块 ========== */
        .guide-section {
            background: var(--bg-light);
        }
        .guide-step {
            text-align: center;
            padding: 28px 20px;
            position: relative;
        }
        .guide-step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 18px;
            box-shadow: 0 6px 20px rgba(229,57,53,0.35);
        }
        .guide-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .guide-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .guide-connector {
            display: none;
            position: absolute;
            top: 56px;
            right: -30px;
            width: 60px;
            height: 2px;
            background: var(--border);
        }
        @media (min-width: 769px) {
            .guide-connector {
                display: block;
            }
            .guide-step:last-child .guide-connector {
                display: none;
            }
        }

        /* ========== 用户热议板块 ========== */
        .community-section {
            background: var(--white);
        }
        .review-card {
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition-smooth);
            height: 100%;
        }
        .review-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .review-stars {
            color: var(--accent-gold);
            font-size: 0.95rem;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 14px;
            font-style: italic;
        }
        .review-author {
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-dark);
        }
        .review-source {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ========== FAQ 板块 ========== */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-item {
            background: var(--white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-dark);
            background: none;
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: color var(--transition-fast);
            font-family: var(--font-body);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            font-size: 0.85rem;
            transition: transform var(--transition-smooth);
            color: var(--text-muted);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.93rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 520px) {
            .faq-question {
                font-size: 0.93rem;
                padding: 16px 18px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
            }
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            position: relative;
            background: var(--dark-bg);
            overflow: hidden;
            padding: 90px 0;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 1;
        }
        .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.9) 0%, rgba(13,27,42,0.7) 100%);
            z-index: 2;
        }
        .cta-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .cta-content h2 {
            color: var(--white);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255,255,255,0.72);
            font-size: 1.08rem;
            margin-bottom: 32px;
        }
        .cta-content .btn-primary-hero {
            font-size: 1.1rem;
            padding: 17px 40px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-content h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .cta-content h2 {
                font-size: 1.4rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
            .cta-content .btn-primary-hero {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0A1520;
            color: rgba(255,255,255,0.65);
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 10px;
            font-family: var(--font-heading);
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 22px;
            text-align: center;
            font-size: 0.84rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom span {
            display: block;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding: 36px 0 24px;
            }
        }

        /* ========== Foundation 覆盖 ========== */
        .grid-container {
            max-width: var(--max-width);
        }
        .button {
            border-radius: var(--radius-full);
            font-weight: 600;
            transition: all var(--transition-smooth);
        }
        .top-bar, .top-bar ul {
            background: transparent;
        }
        .menu > li > a {
            color: rgba(255,255,255,0.82);
        }
        .menu > li > a:hover {
            color: var(--white);
        }