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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: #fafbfe;
            color: #1a2c3e;
            line-height: 1.5;
        }

        :root {
            --primary-teal: #1a7f6b;
            --primary-teal-dark: #0e5e4e;
            --accent-blue: #2c7da0;
            --accent-amber: #e9b35f;
            --gray-bg: #f8f9fc;
            --card-white: #ffffff;
            --text-dark: #1e2f3e;
            --text-muted: #5a6e7c;
            --border-light: #e6edf2;
            --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.03), 0 2px 6px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 20px 30px -12px rgba(0, 0, 0, 0.08);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        .navbar {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 14px 0;
        }

        .nav-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .logo {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary-teal);
            text-decoration: none;
            letter-spacing: -0.3px;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            font-weight: 500;
        }

            .nav-links a {
                text-decoration: none;
                color: var(--text-dark);
                transition: color 0.2s;
            }

                .nav-links a:hover {
                    color: var(--primary-teal);
                }

        .btn-primary {
            background: var(--primary-teal);
            color: white;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.2s;
            border: none;
            cursor: pointer;
        }

            .btn-primary:hover {
                background: var(--primary-teal-dark);
                transform: translateY(-1px);
            }

        .btn-outline {
            border: 1.5px solid var(--primary-teal);
            background: transparent;
            color: var(--primary-teal);
            padding: 8px 24px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: 0.2s;
        }

            .btn-outline:hover {
                background: var(--primary-teal);
                color: white;
            }

        /* Hero */
        .hero {
            padding: 70px 0 50px;
            background: linear-gradient(145deg, #f0f6f4 0%, #ffffff 100%);
        }

        .hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
            justify-content: space-between;
        }

        .hero-content {
            flex: 1;
        }

        .hero-badge {
            background: #e0f0ec;
            color: var(--primary-teal);
            display: inline-block;
            border-radius: 100px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 540px;
            margin-bottom: 32px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 24px;
        }

        .stat-item h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-teal);
        }

        .hero-image {
            flex: 1;
            text-align: center;
        }

            .hero-image i {
                font-size: 8rem;
                color: var(--primary-teal);
                opacity: 0.7;
            }

        section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .section-sub {
            text-align: center;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 56px auto;
            font-size: 1.1rem;
        }

        /* 卡片 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .feature-card {
            background: var(--card-white);
            border-radius: 28px;
            padding: 32px 28px;
            transition: all 0.2s;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

            .feature-card:hover {
                transform: translateY(-4px);
                box-shadow: var(--shadow-md);
            }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-teal);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }

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

        /* 三步骤 */
        .steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin: 40px 0;
        }

        .step-card {
            background: white;
            border-radius: 32px;
            flex: 1;
            min-width: 240px;
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border-top: 4px solid var(--accent-amber);
        }

        .step-number {
            width: 52px;
            height: 52px;
            background: var(--primary-teal);
            color: white;
            font-weight: bold;
            font-size: 1.5rem;
            border-radius: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        /* 重复类型网格 */
        .dup-types {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-top: 32px;
        }

        .dup-item {
            background: var(--card-white);
            border-radius: 24px;
            padding: 24px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            border: 1px solid var(--border-light);
        }

        .dup-icon {
            font-size: 1.8rem;
            color: var(--accent-amber);
        }

        /* 优势特点 */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin-top: 20px;
        }

        .why-card {
            background: white;
            border-radius: 24px;
            padding: 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

            .why-card i {
                font-size: 2.2rem;
                color: var(--primary-teal);
                margin-bottom: 16px;
            }

        .footer {
            background: #0f2a2a;
            color: #b9cdcd;
            padding: 48px 0 24px;
            text-align: center;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .dup-item {
                flex-direction: column;
            }
        }