/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2d47;
            --primary-lighter: #243b5a;
            --accent: #c8943e;
            --accent-light: #d4aa55;
            --accent-dark: #a87a2e;
            --accent-glow: #e8c876;
            --bg: #f3f4f6;
            --bg-alt: #eef0f3;
            --surface: #ffffff;
            --text: #1a1a2e;
            --text-secondary: #4a4a5e;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f0f0f2;
            --danger: #e74c3c;
            --success: #27ae60;
            --info: #3b82f6;
            --radius-xs: 6px;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 6px rgba(0,0,0,0.06);
            --shadow: 0 2px 14px rgba(0,0,0,0.07);
            --shadow-md: 0 6px 22px rgba(0,0,0,0.09);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.11);
            --shadow-xl: 0 20px 50px rgba(0,0,0,0.13);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-stack: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --container-narrow: 960px;
            --section-pad-desktop: 90px;
            --section-pad-tablet: 60px;
            --section-pad-mobile: 40px;
        }

        /* ========== 基础 Reset 与全局样式 ========== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            overflow-x: hidden;
            min-height: 100vh;
            position: relative;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

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

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

        button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-xs);
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); }
        h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
        h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

        /* ========== 容器 ========== */
        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-container--narrow {
            max-width: var(--container-narrow);
        }
        @media (max-width: 640px) {
            .site-container {
                padding: 0 16px;
            }
        }

        /* ========== 板块通用间距 ========== */
        .section {
            padding: var(--section-pad-desktop) 0;
        }
        .section--alt {
            background-color: var(--bg-alt);
        }
        .section--dark {
            background-color: var(--primary);
            color: #e0e0e8;
        }
        .section--dark h2,
        .section--dark h3 {
            color: #ffffff;
        }
        .section--dark .section__subtitle {
            color: #b0b8c4;
        }
        .section__header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section__label {
            display: inline-block;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 10px;
            background: rgba(200,148,62,0.1);
            padding: 5px 14px;
            border-radius: 20px;
        }
        .section__title {
            margin-bottom: 12px;
        }
        .section__subtitle {
            font-size: 1.08rem;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-pad-tablet) 0;
            }
            .section__header {
                margin-bottom: 36px;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: var(--section-pad-mobile) 0;
            }
            .section__header {
                margin-bottom: 28px;
            }
        }

        /* ========== 导航 Header / Top Bar ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15,27,45,0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-lg);
        }
        .site-header .top-bar {
            background: transparent;
            padding: 0;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .site-header .top-bar,
        .site-header .top-bar ul {
            background: transparent;
        }
        .site-header .top-bar-left {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 14px 0;
        }
        .site-header .top-bar-right {
            display: flex;
            align-items: center;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: opacity var(--transition);
        }
        .nav-logo:hover {
            color: #ffffff;
            opacity: 0.88;
        }
        .nav-logo__icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
            margin: 0;
            align-items: center;
        }
        .nav-links a {
            display: inline-block;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: #c8cdd6;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.07);
        }
        .nav-links a.active {
            color: var(--accent-glow);
            background: rgba(200,148,62,0.12);
            font-weight: 600;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.93rem;
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 2px 10px rgba(200,148,62,0.3);
        }
        .nav-cta-btn:hover {
            color: #fff;
            background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
            box-shadow: 0 4px 18px rgba(200,148,62,0.4);
            transform: translateY(-1px);
        }
        /* Foundation top-bar responsive覆盖 */
        .site-header .top-bar .menu {
            background: transparent;
        }
        .site-header .top-bar .menu li {
            background: transparent;
        }
        .site-header .top-bar .menu a {
            color: #c8cdd6;
        }
        .site-header .title-bar {
            background: transparent;
            padding: 10px 0;
        }
        .site-header .menu-icon {
            cursor: pointer;
        }
        .site-header .menu-icon::after {
            background: #ffffff;
            box-shadow: 0 7px 0 #ffffff, 0 14px 0 #ffffff;
        }
        .site-header .menu-icon:hover::after {
            background: var(--accent-glow);
            box-shadow: 0 7px 0 var(--accent-glow), 0 14px 0 var(--accent-glow);
        }
        @media (max-width: 768px) {
            .nav-links {
                flex-direction: column;
                gap: 2px;
                padding: 8px 0;
            }
            .nav-links a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-cta-btn {
                margin-top: 6px;
                justify-content: center;
                width: 100%;
            }
            .site-header .top-bar-right {
                width: 100%;
            }
            .site-header .top-bar-right .menu {
                width: 100%;
            }
        }

        /* ========== Hero 首屏 ========== */
        .hero {
            position: relative;
            background: linear-gradient(160deg, #080f1a 0%, var(--primary) 35%, var(--primary-light) 70%, #0f1f35 100%);
            color: #ffffff;
            padding: 100px 0 110px;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }
        .hero__bg-pattern {
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.06;
            background-image: 
                radial-gradient(circle at 30% 20%, rgba(255,255,255,0.4) 0px, transparent 1px),
                radial-gradient(circle at 70% 50%, rgba(255,255,255,0.3) 0px, transparent 1px),
                radial-gradient(circle at 15% 70%, rgba(200,148,62,0.5) 0px, transparent 1px),
                radial-gradient(circle at 85% 30%, rgba(200,148,62,0.4) 0px, transparent 1px);
            background-size: 180px 180px, 220px 220px, 160px 160px, 200px 200px;
        }
        .hero__glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            filter: blur(160px);
            opacity: 0.18;
            pointer-events: none;
        }
        .hero__glow--left {
            top: -120px;
            left: -100px;
            background: var(--accent);
        }
        .hero__glow--right {
            bottom: -150px;
            right: -120px;
            background: #3b6fb6;
        }
        .hero .site-container {
            position: relative;
            z-index: 2;
        }
        .hero__inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero__content {
            max-width: 560px;
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(200,148,62,0.18);
            border: 1px solid rgba(200,148,62,0.3);
            padding: 7px 16px;
            border-radius: 24px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--accent-glow);
            margin-bottom: 20px;
            letter-spacing: 0.03em;
            animation: pulse-badge 2.5s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%, 100% { box-shadow: 0 0 0 0 rgba(200,148,62,0.3); }
            50% { box-shadow: 0 0 0 12px rgba(200,148,62,0); }
        }
        .hero__badge-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #4cff4c;
            animation: blink-dot 1.2s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        .hero__title {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            font-weight: 800;
            color: #ffffff;
            line-height: 1.15;
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }
        .hero__title .highlight {
            color: var(--accent-glow);
            position: relative;
        }
        .hero__desc {
            font-size: 1.12rem;
            color: #b8c0cc;
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 480px;
        }
        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 26px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            border: none;
            transition: all var(--transition);
            text-align: center;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn--primary {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(200,148,62,0.35);
        }
        .btn--primary:hover {
            background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
            box-shadow: 0 6px 24px rgba(200,148,62,0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(200,148,62,0.35);
        }
        .btn--outline {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.35);
            color: #ffffff;
        }
        .btn--outline:hover {
            border-color: #ffffff;
            background: rgba(255,255,255,0.06);
            color: #ffffff;
            transform: translateY(-2px);
        }
        .btn--lg {
            padding: 15px 34px;
            border-radius: 28px;
            font-size: 1.06rem;
        }
        .btn--sm {
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.88rem;
        }
        .hero__visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero__card-stack {
            position: relative;
            width: 100%;
            max-width: 440px;
        }
        .hero__card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            position: relative;
            z-index: 1;
        }
        .hero__card--offset {
            position: absolute;
            top: 30px;
            right: -20px;
            z-index: 0;
            opacity: 0.7;
            transform: scale(0.9);
        }
        .hero__live-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #e74c3c;
            color: #fff;
            padding: 5px 12px;
            border-radius: 16px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            animation: live-glow 1.8s ease-in-out infinite;
        }
        @keyframes live-glow {
            0%, 100% { box-shadow: 0 0 8px rgba(231,76,60,0.5); }
            50% { box-shadow: 0 0 22px rgba(231,76,60,0.8); }
        }
        .hero__match-teams {
            font-size: 1.5rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 6px;
        }
        .hero__match-info {
            font-size: 0.9rem;
            color: #b0b8c4;
        }
        @media (max-width: 900px) {
            .hero__inner {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero__content {
                max-width: 100%;
            }
            .hero__desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero__actions {
                justify-content: center;
            }
            .hero__visual {
                display: none;
            }
            .hero {
                padding: 70px 0 80px;
                min-height: auto;
            }
        }
        @media (max-width: 520px) {
            .hero {
                padding: 50px 0 60px;
            }
            .hero__actions {
                flex-direction: column;
                width: 100%;
            }
            .hero__actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== 板块：核心优势 ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 0 0 3px 3px;
            transition: width var(--transition-slow);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: #d8dae0;
        }
        .feature-card:hover::before {
            width: 70%;
        }
        .feature-card__icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, rgba(200,148,62,0.12) 0%, rgba(200,148,62,0.06) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-card__icon {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            transform: scale(1.08);
        }
        .feature-card__title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card__desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.55;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-card {
                padding: 24px 18px;
            }
        }

        /* ========== 板块：热门直播赛事 ========== */
        .matches-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .match-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .match-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #d4d6dc;
        }
        .match-card__status {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            padding: 4px 10px;
            border-radius: 14px;
            margin-bottom: 12px;
        }
        .match-card__status--live {
            background: #fde8e8;
            color: #c0392b;
        }
        .match-card__status--upcoming {
            background: #e8f4fd;
            color: #2471a3;
        }
        .match-card__status--finished {
            background: #eafaf1;
            color: #1e8449;
        }
        .match-card__teams {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
        .match-card__meta {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .match-card__meta i {
            font-size: 0.8rem;
        }
        .match-card__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 12px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .match-card__link:hover {
            color: var(--accent-dark);
            gap: 8px;
        }
        @media (max-width: 1024px) {
            .matches-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .matches-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ========== 板块：数据统计 ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .stat-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .stat-item__number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .stat-item__label {
            font-size: 0.93rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-item {
                padding: 22px 14px;
            }
            .stat-item__number {
                font-size: 2rem;
            }
        }

        /* ========== 板块：观看指南 / 流程 ========== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            list-style: none;
        }
        .step-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-item__num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-item__title {
            font-weight: 700;
            font-size: 1.06rem;
            margin-bottom: 8px;
        }
        .step-item__desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.55;
        }
        @media (max-width: 900px) {
            .steps-list {
                grid-template-columns: 1fr;
                gap: 16px;
                max-width: 500px;
                margin: 0 auto;
            }
        }

        /* ========== 板块：用户评价 ========== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .testimonial-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow);
            border-color: #d4d6dc;
        }
        .testimonial-card__stars {
            color: #f0b429;
            font-size: 0.95rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }
        .testimonial-card__text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
            font-style: italic;
        }
        .testimonial-card__author {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text);
        }
        .testimonial-card__author span {
            color: var(--text-muted);
            font-weight: 400;
            font-size: 0.82rem;
        }
        @media (max-width: 900px) {
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ========== 板块：FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            margin-bottom: 10px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: #d0d3d9;
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item[open] summary {
            background: #fafbfc;
        }
        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA 横幅 ========== */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #1a3050 100%);
            border-radius: var(--radius-2xl);
            padding: 50px 40px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(200,148,62,0.15) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-banner__title {
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner__subtitle {
            font-size: 1.04rem;
            color: #c0c8d4;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn {
            position: relative;
            z-index: 1;
        }
        @media (max-width: 640px) {
            .cta-banner {
                padding: 36px 22px;
                border-radius: var(--radius-xl);
            }
        }

        /* ========== Footer 页脚 ========== */
        .site-footer {
            background: var(--primary);
            color: #b0b8c4;
            padding: 50px 0 30px;
            font-size: 0.9rem;
        }
        .site-footer__inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .site-footer__brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .site-footer__brand-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-xs);
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #fff;
        }
        .site-footer__desc {
            color: #8892a0;
            line-height: 1.6;
            max-width: 360px;
        }
        .site-footer__col-title {
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
            font-size: 0.95rem;
        }
        .site-footer__links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer__links li {
            margin-bottom: 8px;
        }
        .site-footer__links a {
            color: #8892a0;
            transition: color var(--transition);
            font-size: 0.88rem;
        }
        .site-footer__links a:hover {
            color: var(--accent-glow);
        }
        .site-footer__bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 22px;
            text-align: center;
            color: #6b7280;
            font-size: 0.84rem;
        }
        @media (max-width: 768px) {
            .site-footer__inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer__desc {
                max-width: 100%;
            }
        }

        /* ========== 分隔线 ========== */
        .divider {
            width: 50px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 3px;
            margin: 0 auto 20px;
        }

        /* ========== 响应式通用辅助 ========== */
        .hide-mobile {
            display: block;
        }
        @media (max-width: 768px) {
            .hide-mobile {
                display: none;
            }
        }
        .text-center-mobile {
            text-align: left;
        }
        @media (max-width: 640px) {
            .text-center-mobile {
                text-align: center;
            }
        }

        /* ========== Foundation 覆盖微调 ========== */
        .top-bar, .top-bar ul, .top-bar li {
            background: transparent !important;
        }
        .top-bar .menu .active > a {
            background: transparent;
        }
        @media (max-width: 768px) {
            .top-bar .menu {
                background: rgba(15,27,45,0.98) !important;
                border-radius: var(--radius);
                margin-top: 4px;
            }
        }