/* roulang page: index */
:root {
            --primary-deep-green: #0A3D2E;
            --primary-dark-green: #06251C;
            --accent-orange: #F25C2A;
            --accent-orange-hover: #D94A1E;
            --bg-warm-white: #F7F5F2;
            --card-white: #FFFFFF;
            --text-dark: #0A2A1F;
            --text-body: #3A3A3A;
            --text-muted: #6B6B6B;
            --text-on-dark: #F0EDE8;
            --border-light: rgba(10, 61, 46, 0.08);
            --shadow-card: 0 4px 16px rgba(10, 61, 46, 0.06);
            --shadow-hover: 0 12px 28px rgba(10, 61, 46, 0.12);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 40px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-warm-white);
            color: var(--text-body);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            padding-top: var(--nav-height);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
            background: transparent;
            font-weight: 600;
            transition: all 0.25s ease;
            border-radius: var(--radius-btn);
            white-space: nowrap;
        }

        h1, h2, h3 {
            color: var(--text-dark);
            font-weight: 700;
            letter-spacing: -0.3px;
        }

        h1 { font-size: 2.8rem; line-height: 1.2; }
        h2 { font-size: 2.2rem; line-height: 1.3; margin-bottom: 0.5rem; }
        h3 { font-size: 1.4rem; line-height: 1.4; }

        section {
            padding: 90px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-desc {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: var(--card-white);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            z-index: 1000;
            display: flex;
            align-items: center;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--primary-deep-green);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            font-size: 2rem;
            color: var(--accent-orange);
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
        }
        .nav-links a {
            color: var(--text-body);
            padding: 6px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover {
            color: var(--accent-orange);
            border-bottom-color: var(--accent-orange);
        }
        .nav-cta {
            background: var(--accent-orange);
            color: white !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-pill) !important;
            font-weight: 700;
            border: none !important;
        }
        .nav-cta:hover {
            background: var(--accent-orange-hover) !important;
            color: white !important;
            transform: scale(1.03);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--primary-deep-green);
            transition: 0.2s;
        }

        /* Hero */
        .hero {
            background: linear-gradient(180deg, var(--bg-warm-white) 60%, var(--primary-deep-green) 60%);
            padding: 60px 0 30px;
            color: var(--text-dark);
        }
        .hero-grid {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 40px;
        }
        .hero-text {
            text-align: center;
            max-width: 720px;
        }
        .hero-text h1 {
            margin-bottom: 20px;
        }
        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 28px;
        }
        .btn-primary {
            background: var(--accent-orange);
            color: white;
            padding: 16px 36px;
            font-size: 1.1rem;
            box-shadow: 0 6px 18px rgba(242,92,42,0.3);
        }
        .btn-primary:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(242,92,42,0.4);
        }
        .btn-outline {
            border: 2px solid var(--primary-deep-green);
            color: var(--primary-deep-green);
            padding: 16px 36px;
            font-size: 1.1rem;
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary-deep-green);
            color: white;
        }
        .live-score-card {
            background: rgba(6, 25, 28, 0.9);
            backdrop-filter: blur(12px);
            border-radius: 24px;
            padding: 28px 36px;
            color: white;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            width: 100%;
            max-width: 680px;
            box-shadow: 0 20px 35px rgba(0,0,0,0.5);
            margin-top: 20px;
        }
        .team {
            font-weight: 700;
            font-size: 1.5rem;
        }
        .score {
            font-family: var(--font-mono);
            font-size: 3.8rem;
            font-weight: 700;
            color: var(--accent-orange);
            letter-spacing: 2px;
        }
        .live-badge {
            background: var(--accent-orange);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 700;
            animation: pulse 1.6s infinite;
        }
        @keyframes pulse { 0%{opacity:1;} 50%{opacity:0.7;} 100%{opacity:1;} }

        /* 功能卡片 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--card-white);
            padding: 32px 24px;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            font-size: 2.6rem;
            color: var(--accent-orange);
            margin-bottom: 20px;
        }
        .feature-card h3 { margin-bottom: 10px; }
        .tag {
            display: inline-block;
            background: rgba(10,61,46,0.08);
            color: var(--primary-deep-green);
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 20px;
            margin-top: 14px;
        }

        /* 场景 */
        .scenarios-row {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .scenario-item {
            flex: 1 1 280px;
            background: var(--card-white);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .scenario-item img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scenario-text {
            padding: 24px;
        }

        /* 数据案例 */
        .stats-grid {
            display: flex;
            justify-content: center;
            gap: 60px;
            flex-wrap: wrap;
            margin: 40px 0;
        }
        .stat-number {
            font-family: var(--font-mono);
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--accent-orange);
        }
        .testimonial {
            background: var(--card-white);
            padding: 24px;
            border-radius: 16px;
            box-shadow: var(--shadow-card);
        }

        /* 价格 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .pricing-card {
            background: var(--card-white);
            padding: 36px 28px;
            border-radius: 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            border: 2px solid transparent;
            position: relative;
        }
        .pricing-card.recommended {
            border-color: var(--accent-orange);
            transform: scale(1.02);
        }
        .badge-popular {
            background: var(--accent-orange);
            color: white;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.8rem;
            position: absolute;
            top: -12px;
            right: 20px;
        }
        .price {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-deep-green);
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.15rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: var(--text-muted);
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            margin-top: 10px;
        }

        /* CTA */
        .cta-bottom {
            background: linear-gradient(135deg, #0A3D2E, #06251C);
            color: var(--text-on-dark);
            text-align: center;
            padding: 100px 0;
        }

        /* 页脚 */
        .footer {
            background: #06251C;
            color: #B0B8B5;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }

        @media (max-width: 1024px) {
            .features-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
            .nav-links { display: none; }
            .hamburger { display: flex; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            .features-grid, .pricing-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .live-score-card { flex-direction: column; gap: 15px; }
        }