/* roulang page: index */
:root {
            --primary: #00E5A0;
            --primary-glow: rgba(0, 229, 160, 0.4);
            --primary-soft: rgba(0, 229, 160, 0.1);
            --bg-dark: #0A0E17;
            --bg-card-dark: #1A1F2E;
            --bg-light: #F4F6FA;
            --text-light: #F4F6FA;
            --text-dark: #1E2330;
            --text-muted: #7E8493;
            --danger: #FF4757;
            --border-light: #E0E4EC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
            --shadow-glow: 0 0 18px rgba(0,229,160,0.5);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Menlo', 'Consolas', 'Courier New', monospace;
            --nav-height: 72px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            line-height: 1.6;
            color: var(--text-dark);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button, input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        /* 导航 */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(10, 14, 23, 0.75);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            z-index: 1000;
            display: flex;
            align-items: center;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        #nav.scrolled {
            background: rgba(10, 14, 23, 0.95);
            box-shadow: 0 4px 20px rgba(0,0,0,0.4);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.8rem;
            background: linear-gradient(135deg, #00E5A0 0%, #0ABF7A 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255,255,255,0.85);
            transition: color 0.2s;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
        }
        .btn-nav {
            background: var(--primary);
            color: #0A0E17 !important;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.25s ease;
            box-shadow: 0 0 8px rgba(0,229,160,0.2);
        }
        .btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
            background: #0FF5B2;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: white;
            background: transparent;
            cursor: pointer;
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            height: 100vh;
            background: var(--bg-dark);
            z-index: 1100;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 36px;
            transform: translateX(100%);
            transition: transform 0.35s ease;
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .mobile-menu a {
            font-size: 1.4rem;
            font-weight: 600;
            color: white;
        }
        .mobile-menu .close-btn {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 2rem;
            color: white;
            background: none;
        }
        /* Hero */
        #hero {
            background: linear-gradient(135deg, #0A0E17 0%, #141B2B 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            position: relative;
            overflow: hidden;
        }
        .hero-particle {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }
        .hero-text {
            flex: 1;
        }
        .hero-text h1 {
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.25;
            color: white;
            margin-bottom: 16px;
        }
        .hero-text .highlight {
            color: var(--primary);
        }
        .hero-text p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 32px;
            max-width: 500px;
        }
        .live-score-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0,229,160,0.1);
            border: 1px solid rgba(0,229,160,0.3);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-family: var(--font-mono);
            font-size: 1.1rem;
            margin-bottom: 20px;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0,229,160,0.3); }
            70% { box-shadow: 0 0 0 10px rgba(0,229,160,0); }
            100% { box-shadow: 0 0 0 0 rgba(0,229,160,0); }
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #0A0E17;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            transition: all 0.25s ease;
            box-shadow: 0 0 10px rgba(0,229,160,0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            background: var(--primary-soft);
        }
        .hero-mockup {
            flex: 0 0 320px;
            filter: drop-shadow(0 20px 40px rgba(0,229,160,0.25));
        }
        /* 指标看板 */
        #metrics {
            padding: 100px 0;
            background: white;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 48px;
            color: var(--text-dark);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--bg-card-dark);
            color: white;
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .metric-number {
            font-family: var(--font-mono);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .metric-label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            margin-top: 6px;
        }
        .trend-up {
            color: var(--primary);
        }
        .trend-down {
            color: var(--danger);
        }
        /* 服务矩阵 */
        #services {
            padding: 100px 0;
            background: var(--bg-light);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: start;
        }
        .service-card {
            background: white;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: all 0.3s ease;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .service-card.tall {
            margin-top: -12px;
            margin-bottom: -12px;
            padding: 40px 24px;
        }
        .service-icon {
            font-size: 2.4rem;
            background: linear-gradient(135deg, #00E5A0, #0ABF7A);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 16px;
        }
        .service-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .service-desc {
            color: #5A6070;
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .badge {
            display: inline-block;
            background: var(--primary-soft);
            color: #0A7A5A;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
        }
        /* 对比 */
        #compare {
            padding: 100px 0;
            background: white;
        }
        .compare-wrapper {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .compare-col {
            flex: 1;
            background: #F9FAFB;
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .compare-col.winner {
            background: linear-gradient(135deg, #F0FFF8 0%, #E0FFF0 100%);
            border: 1px solid var(--primary);
        }
        .compare-col h3 {
            margin-bottom: 20px;
        }
        .compare-list {
            list-style: none;
        }
        .compare-list li {
            padding: 10px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid #eee;
        }
        .compare-list i.fa-times {
            color: var(--danger);
        }
        .compare-list i.fa-check {
            color: var(--primary);
        }
        .vs-badge {
            background: var(--primary);
            color: #0A0E17;
            font-weight: 800;
            border-radius: 50%;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        /* FAQ */
        #faq {
            padding: 100px 0;
            background: var(--bg-light);
        }
        .faq-item {
            background: white;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            cursor: pointer;
            border-left: 3px solid transparent;
            transition: 0.2s;
        }
        .faq-item.active .faq-question {
            border-left-color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
            color: #555;
        }
        .faq-item.active .faq-answer {
            max-height: 160px;
            padding-bottom: 18px;
        }
        /* CTA */
        #cta {
            padding: 100px 0;
            background: linear-gradient(135deg, #0A0E17, #141B2B);
            text-align: center;
            color: white;
        }
        .cta-form {
            display: flex;
            max-width: 500px;
            margin: 28px auto 0;
            gap: 12px;
        }
        .cta-form input {
            flex: 1;
            height: 48px;
            border-radius: var(--radius-sm);
            padding: 0 16px;
            background: #F0F2F5;
            border: 1px solid #D0D5DD;
        }
        .cta-form button {
            height: 48px;
            padding: 0 28px;
            background: var(--primary);
            color: #0A0E17;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }
        .trust-text {
            margin-top: 14px;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.6);
        }
        /* Footer */
        #footer {
            background: #0F1219;
            color: rgba(255,255,255,0.65);
            padding: 48px 0;
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        @media (max-width: 1024px) {
            .nav-links { display: none; }
            .hamburger { display: block; }
            .hero-content { flex-direction: column; text-align: center; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: 1fr 1fr; }
            .compare-wrapper { flex-direction: column; }
        }
        @media (max-width: 768px) {
            .metrics-grid { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .hero-text h1 { font-size: 2.2rem; }
            .cta-form { flex-direction: column; }
        }