/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            /* 主色系 - 深色背景 */
            --color-bg-deep: #060b14;
            --color-bg-primary: #0a0f1c;
            --color-bg-secondary: #0f1525;
            --color-bg-card: #141b2d;
            --color-bg-card-hover: #1a2238;
            --color-bg-elevated: #1b2340;

            /* 霓虹强调色 - 金色 */
            --color-neon: #f0a828;
            --color-neon-bright: #ffba3d;
            --color-neon-glow: rgba(240, 168, 40, 0.55);
            --color-neon-soft: rgba(240, 168, 40, 0.18);

            /* 辅色 */
            --color-accent-green: #00c896;
            --color-accent-green-glow: rgba(0, 200, 150, 0.45);
            --color-accent-blue: #4da8da;
            --color-accent-blue-glow: rgba(77, 168, 218, 0.4);

            /* 文字 */
            --color-text-primary: #eef1f7;
            --color-text-secondary: #b8c1d4;
            --color-text-muted: #6e7a95;
            --color-text-inverse: #0a0f1c;

            /* 边框与分割 */
            --color-border: #1e2840;
            --color-border-light: #283350;
            --color-border-neon: rgba(240, 168, 40, 0.35);

            /* 圆角 */
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 50%;

            /* 阴影 */
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.3);
            --shadow-sm: 0 3px 10px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
            --shadow-neon: 0 0 22px var(--color-neon-glow), 0 0 50px rgba(240, 168, 40, 0.2);
            --shadow-neon-sm: 0 0 10px var(--color-neon-glow);
            --shadow-card-hover: 0 12px 36px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--color-border-neon);

            /* 间距 */
            --space-xs: 6px;
            --space-sm: 12px;
            --space-md: 20px;
            --space-lg: 32px;
            --space-xl: 48px;
            --space-2xl: 64px;
            --space-3xl: 90px;
            --space-section: 100px;

            /* 字体 */
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;

            /* 字号 */
            --text-xs: 0.75rem;
            --text-sm: 0.875rem;
            --text-base: 1rem;
            --text-md: 1.125rem;
            --text-lg: 1.25rem;
            --text-xl: 1.5rem;
            --text-2xl: 1.875rem;
            --text-3xl: 2.25rem;
            --text-4xl: 3rem;
            --text-5xl: 3.75rem;
            --text-hero: 4.2rem;

            /* 过渡 */
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;

            /* 容器 */
            --container-max: 1240px;
            --container-narrow: 900px;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            font-size: var(--text-base);
            line-height: 1.65;
            color: var(--color-text-primary);
            background-color: var(--color-bg-deep);
            background-image:
                radial-gradient(ellipse at 30% 10%, rgba(240, 168, 40, 0.03) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(0, 200, 150, 0.03) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 85%, rgba(77, 168, 218, 0.03) 0%, transparent 50%);
            background-attachment: fixed;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text-primary);
        }

        /* ============ 容器 ============ */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }

        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ============ 导航 Header / Nav ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 15, 28, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 12, 22, 0.95);
            border-bottom-color: var(--color-border-neon);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5), 0 0 40px rgba(240, 168, 40, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: var(--text-xl);
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--color-text-primary);
            white-space: nowrap;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
            position: relative;
        }

        .site-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-neon), #d4891a);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #0a0f1c;
            box-shadow: var(--shadow-neon-sm);
            flex-shrink: 0;
        }

        .site-logo:hover {
            color: var(--color-neon-bright);
            text-shadow: 0 0 18px var(--color-neon-glow);
        }

        .site-logo:hover .logo-icon {
            box-shadow: 0 0 28px var(--color-neon-glow), 0 0 60px rgba(240, 168, 40, 0.3);
        }

        /* 主导航 */
        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
        }

        .nav-list li {
            position: relative;
        }

        .nav-link {
            display: block;
            padding: var(--space-xs) var(--space-md);
            font-size: var(--text-sm);
            font-weight: 600;
            letter-spacing: 0.03em;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast), text-shadow var(--transition-fast);
            position: relative;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--color-neon);
            border-radius: 1px;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            box-shadow: 0 0 8px var(--color-neon-glow);
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.03);
        }

        .nav-link:hover::after {
            transform: translateX(-50%) scaleX(0.7);
        }

        .nav-link.active {
            color: var(--color-neon-bright);
            text-shadow: 0 0 14px var(--color-neon-glow);
        }

        .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
            box-shadow: 0 0 14px var(--color-neon-glow), 0 0 28px rgba(240, 168, 40, 0.35);
        }

        /* 导航CTA按钮 */
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 9px 20px;
            font-size: var(--text-sm);
            font-weight: 700;
            letter-spacing: 0.03em;
            color: #0a0f1c;
            background: var(--color-neon);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            box-shadow: 0 0 14px var(--color-neon-glow);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--color-neon-bright);
            box-shadow: 0 0 24px var(--color-neon-glow), 0 0 50px rgba(240, 168, 40, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        /* 移动端菜单按钮 */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: var(--space-sm);
            z-index: 1001;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
            background: var(--color-neon);
            box-shadow: 0 0 8px var(--color-neon-glow);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
            background: var(--color-neon);
            box-shadow: 0 0 8px var(--color-neon-glow);
        }

        /* ============ Hero 首屏 ============ */
        .hero {
            position: relative;
            padding-top: calc(var(--nav-height) + var(--space-3xl));
            padding-bottom: var(--space-3xl);
            min-height: 85vh;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 700px;
            height: 700px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 168, 40, 0.07) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 200, 150, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-3xl);
            align-items: center;
        }

        .hero-content {
            max-width: 600px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 6px 14px;
            font-size: var(--text-xs);
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-neon-bright);
            background: var(--color-neon-soft);
            border: 1px solid var(--color-border-neon);
            border-radius: var(--radius-xl);
            margin-bottom: var(--space-lg);
            animation: pulse-badge 2.8s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(240, 168, 40, 0.25);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(240, 168, 40, 0);
            }
        }

        .hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-neon-bright);
            box-shadow: 0 0 8px var(--color-neon-glow);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 6px var(--color-neon-glow);
            }
            50% {
                box-shadow: 0 0 16px var(--color-neon-glow), 0 0 30px rgba(240, 168, 40, 0.5);
            }
        }

        .hero-title {
            font-size: var(--text-hero);
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.08;
            margin-bottom: var(--space-md);
            color: #fff;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-neon-bright), #e8991a);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }

        .hero-subtitle {
            font-size: var(--text-lg);
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: var(--space-xl);
            max-width: 500px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 14px 28px;
            font-size: var(--text-base);
            font-weight: 700;
            letter-spacing: 0.03em;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }

        .btn--primary {
            background: linear-gradient(135deg, var(--color-neon), #d4891a);
            color: #0a0f1c;
            box-shadow: 0 0 20px var(--color-neon-glow), 0 4px 16px rgba(0, 0, 0, 0.3);
        }

        .btn--primary:hover {
            box-shadow: 0 0 32px var(--color-neon-glow), 0 0 60px rgba(240, 168, 40, 0.4), 0 8px 24px rgba(0, 0, 0, 0.4);
            transform: translateY(-2px);
        }

        .btn--primary:active {
            transform: scale(0.96);
        }

        .btn--outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid var(--color-border-light);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .btn--outline:hover {
            border-color: var(--color-neon);
            color: var(--color-neon-bright);
            box-shadow: 0 0 18px var(--color-neon-glow), 0 4px 16px rgba(0, 0, 0, 0.3);
            transform: translateY(-2px);
        }

        .btn--outline:active {
            transform: scale(0.96);
        }

        .btn--sm {
            padding: 9px 18px;
            font-size: var(--text-sm);
            border-radius: var(--radius-sm);
        }

        .btn--lg {
            padding: 17px 34px;
            font-size: var(--text-md);
            border-radius: var(--radius-lg);
        }

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

        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 420px;
            aspect-ratio: 4/3;
        }

        .hero-card-1,
        .hero-card-2,
        .hero-card-3 {
            position: absolute;
            border-radius: var(--radius-lg);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
        }

        .hero-card-1 {
            top: 5%;
            left: 5%;
            width: 75%;
            height: 75%;
            z-index: 3;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border-neon);
            background: linear-gradient(160deg, var(--color-bg-card) 0%, var(--color-bg-elevated) 100%);
        }

        .hero-card-1 .card-inner-icon {
            font-size: 4rem;
            color: var(--color-neon);
            opacity: 0.9;
            filter: drop-shadow(0 0 20px var(--color-neon-glow));
        }

        .hero-card-2 {
            top: 18%;
            right: 2%;
            width: 55%;
            height: 55%;
            z-index: 2;
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent-green);
            opacity: 0.7;
            background: linear-gradient(160deg, var(--color-bg-card) 0%, #162035 100%);
            border: 1px solid rgba(0, 200, 150, 0.3);
        }

        .hero-card-3 {
            bottom: 2%;
            left: 20%;
            width: 50%;
            height: 50%;
            z-index: 1;
            box-shadow: var(--shadow-sm);
            opacity: 0.45;
            background: var(--color-bg-secondary);
            border: 1px solid var(--color-border-light);
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: var(--space-section) 0;
        }

        .section--alt {
            background: var(--color-bg-primary);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }

        .section-label {
            display: inline-block;
            font-size: var(--text-xs);
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-neon);
            margin-bottom: var(--space-sm);
        }

        .section-title {
            font-size: var(--text-3xl);
            font-weight: 800;
            letter-spacing: -0.01em;
            color: #fff;
            margin-bottom: var(--space-sm);
        }

        .section-desc {
            font-size: var(--text-md);
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ============ 直播覆盖板块 ============ */
        .coverage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-lg);
        }

        .coverage-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .coverage-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-neon), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

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

        .coverage-card:hover::before {
            opacity: 1;
        }

        .coverage-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-full);
            background: var(--color-neon-soft);
            color: var(--color-neon-bright);
            font-size: 1.5rem;
            margin-bottom: var(--space-md);
            transition: all var(--transition-base);
        }

        .coverage-card:hover .coverage-icon {
            box-shadow: 0 0 22px var(--color-neon-glow);
            background: rgba(240, 168, 40, 0.25);
        }

        .coverage-card h3 {
            font-size: var(--text-md);
            font-weight: 700;
            margin-bottom: var(--space-xs);
            color: #fff;
        }

        .coverage-card p {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ============ 特色优势板块 ============ */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-lg);
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }

        .feature-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            background: var(--color-bg-card-hover);
        }

        .feature-card .feat-icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: var(--space-sm);
        }

        .feat-icon-wrap.icon-gold {
            background: rgba(240, 168, 40, 0.15);
            color: var(--color-neon-bright);
        }

        .feat-icon-wrap.icon-green {
            background: rgba(0, 200, 150, 0.15);
            color: var(--color-accent-green);
        }

        .feat-icon-wrap.icon-blue {
            background: rgba(77, 168, 218, 0.15);
            color: var(--color-accent-blue);
        }

        .feature-card h3 {
            font-size: var(--text-lg);
            font-weight: 700;
            color: #fff;
        }

        .feature-card p {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            line-height: 1.7;
            flex-grow: 1;
        }

        .feature-card .feat-tag {
            display: inline-block;
            font-size: var(--text-xs);
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-xl);
            background: var(--color-neon-soft);
            color: var(--color-neon-bright);
            align-self: flex-start;
        }

        /* ============ 热门赛事板块 ============ */
        .matches-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-lg);
        }

        .match-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-lg);
            display: flex;
            align-items: center;
            gap: var(--space-lg);
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .match-card:hover {
            border-color: var(--color-border-neon);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            background: var(--color-bg-card-hover);
        }

        .match-card .match-status {
            flex-shrink: 0;
            text-align: center;
            min-width: 60px;
        }

        .match-status .status-dot {
            display: inline-block;
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--color-accent-green);
            box-shadow: 0 0 10px var(--color-accent-green-glow);
            margin-bottom: 4px;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        .match-status .status-text {
            font-size: var(--text-xs);
            font-weight: 700;
            color: var(--color-accent-green);
            letter-spacing: 0.04em;
        }

        .match-info {
            flex-grow: 1;
            min-width: 0;
        }

        .match-info h4 {
            font-size: var(--text-base);
            font-weight: 700;
            color: #fff;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .match-info .match-meta {
            font-size: var(--text-xs);
            color: var(--color-text-muted);
        }

        .match-card .match-arrow {
            flex-shrink: 0;
            color: var(--color-text-muted);
            font-size: var(--text-lg);
            transition: all var(--transition-fast);
        }

        .match-card:hover .match-arrow {
            color: var(--color-neon-bright);
            transform: translateX(4px);
        }

        /* ============ 数据统计板块 ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-lg);
        }

        .stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            transition: all var(--transition-base);
        }

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

        .stat-number {
            font-size: var(--text-4xl);
            font-weight: 900;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: var(--space-xs);
            font-variant-numeric: tabular-nums;
        }

        .stat-number .stat-plus {
            color: var(--color-neon-bright);
        }

        .stat-label {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ============ 观赛流程板块 ============ */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-lg);
            counter-reset: step;
        }

        .step-item {
            position: relative;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            transition: all var(--transition-base);
            counter-increment: step;
        }

        .step-item::before {
            content: counter(step);
            position: absolute;
            top: -16px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-neon), #c47e14);
            color: #0a0f1c;
            font-weight: 800;
            font-size: var(--text-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 14px var(--color-neon-glow);
            z-index: 2;
        }

        .step-item:hover {
            border-color: var(--color-border-neon);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .step-item h4 {
            font-size: var(--text-md);
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--space-xs);
            margin-top: var(--space-sm);
        }

        .step-item p {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ============ FAQ 板块 ============ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-border-light);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg);
            font-size: var(--text-base);
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: left;
            gap: var(--space-md);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-border);
            transition: all var(--transition-base);
            font-size: 0.7rem;
            color: var(--color-text-muted);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--color-neon-soft);
            color: var(--color-neon-bright);
            transform: rotate(45deg);
            box-shadow: 0 0 8px var(--color-neon-glow);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }

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

        .faq-answer-inner {
            padding: 0 var(--space-lg) var(--space-lg);
            font-size: var(--text-sm);
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        /* ============ CTA 行动号召板块 ============ */
        .cta-section {
            position: relative;
            background: var(--color-bg-primary);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--space-3xl) var(--space-2xl);
            text-align: center;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 168, 40, 0.06) 0%, transparent 65%);
            pointer-events: none;
        }

        .cta-section>* {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: var(--text-3xl);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--space-md);
        }

        .cta-section p {
            font-size: var(--text-md);
            color: var(--color-text-secondary);
            max-width: 550px;
            margin: 0 auto var(--space-xl);
            line-height: 1.7;
        }

        .cta-section .btn--primary {
            font-size: var(--text-md);
            padding: 16px 36px;
            border-radius: var(--radius-lg);
        }

        /* ============ 页脚 Footer ============ */
        .site-footer {
            background: var(--color-bg-deep);
            border-top: 1px solid var(--color-border);
            padding: var(--space-2xl) 0 var(--space-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--space-xl);
            padding-bottom: var(--space-xl);
            border-bottom: 1px solid var(--color-border);
            margin-bottom: var(--space-lg);
        }

        .footer-brand .footer-logo {
            font-size: var(--text-xl);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--space-sm);
            display: inline-block;
        }

        .footer-brand .footer-logo:hover {
            color: var(--color-neon-bright);
            text-shadow: 0 0 12px var(--color-neon-glow);
        }

        .footer-brand p {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: var(--text-sm);
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--space-md);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }

        .footer-col ul li a {
            font-size: var(--text-sm);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--space-md);
            font-size: var(--text-xs);
            color: var(--color-text-muted);
        }

        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--color-neon-bright);
        }

        /* ============ 辅助组件 ============ */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--color-border);
            margin: 0;
        }

        .divider--neon {
            background: linear-gradient(90deg, transparent, var(--color-border-neon), transparent);
            height: 1px;
        }

        .text-neon {
            color: var(--color-neon-bright);
        }

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

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* ============ 响应式设计 ============ */
        @media (max-width: 1024px) {
            :root {
                --text-hero: 3rem;
                --text-4xl: 2.4rem;
                --text-3xl: 1.9rem;
                --space-section: 70px;
                --space-3xl: 60px;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
                text-align: center;
            }

            .hero-content {
                max-width: 100%;
                order: 1;
            }

            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }

            .hero-actions {
                justify-content: center;
            }

            .hero-visual {
                order: 0;
                max-width: 350px;
                margin: 0 auto;
            }

            .hero-card-stack {
                max-width: 300px;
            }

            .coverage-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

        @media (max-width: 768px) {
            :root {
                --text-hero: 2.4rem;
                --text-4xl: 2rem;
                --text-3xl: 1.6rem;
                --text-2xl: 1.4rem;
                --space-section: 56px;
                --space-3xl: 44px;
                --space-2xl: 36px;
                --nav-height: 60px;
            }

            .container {
                padding: 0 var(--space-md);
            }

            .header-inner {
                padding: 0 var(--space-md);
            }

            /* 移动端导航 */
            .main-nav {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 15, 28, 0.97);
                backdrop-filter: blur(30px);
                -webkit-backdrop-filter: blur(30px);
                flex-direction: column;
                justify-content: flex-start;
                padding: calc(var(--nav-height) + var(--space-xl)) var(--space-lg) var(--space-lg);
                transition: right var(--transition-base);
                border-left: 1px solid var(--color-border);
                box-shadow: -4px 0 30px rgba(0, 0, 0, 0.6);
                z-index: 999;
                gap: var(--space-lg);
            }

            .main-nav.open {
                right: 0;
            }

            .nav-list {
                flex-direction: column;
                width: 100%;
                gap: var(--space-xs);
            }

            .nav-link {
                padding: var(--space-sm) var(--space-md);
                font-size: var(--text-md);
                width: 100%;
                border-radius: var(--radius-sm);
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                background: var(--color-neon-soft);
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                width: 100%;
                justify-content: center;
                margin-top: var(--space-md);
            }

            .mobile-toggle {
                display: flex;
            }

            .hero {
                min-height: 70vh;
                padding-top: calc(var(--nav-height) + var(--space-xl));
                padding-bottom: var(--space-xl);
            }

            .hero-visual {
                max-width: 240px;
            }

            .hero-card-stack {
                max-width: 220px;
            }

            .coverage-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-md);
            }

            .steps-list {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }

            .cta-section {
                padding: var(--space-xl) var(--space-lg);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }

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

            .section-header {
                margin-bottom: var(--space-xl);
            }

            .match-card {
                flex-direction: column;
                text-align: center;
                gap: var(--space-sm);
            }

            .match-info h4 {
                white-space: normal;
            }
        }

        @media (max-width: 520px) {
            :root {
                --text-hero: 2rem;
                --text-3xl: 1.4rem;
                --text-2xl: 1.25rem;
                --space-section: 44px;
                --space-3xl: 32px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

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

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

            .coverage-card,
            .feature-card,
            .stat-card,
            .step-item,
            .match-card {
                padding: var(--space-md);
            }

            .site-logo {
                font-size: var(--text-md);
                gap: 6px;
            }

            .site-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
        }

        /* 移动端遮罩 */
        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-base);
        }

        .nav-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }