:root {
            --primary: #0a5cb8;
            --secondary: #00a8e8;
            --accent: #ffcc00;
            --dark: #1a2b4c;
            --light: #f8f9fa;
            --success: #28a745;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
        }
        .navbar-brand span {
            color: var(--primary);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 92, 184, 0.85), rgba(0, 168, 232, 0.8)), url('https://images.unsplash.com/photo-1621905252507-b35492cc74b4?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            color: var(--dark);
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary);
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: rgba(10, 92, 184, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary);
            font-size: 1.8rem;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--secondary);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary);
        }
        .stat-box {
            text-align: center;
            padding: 30px 15px;
            border-radius: 10px;
            background: var(--light);
            transition: all 0.3s;
        }
        .stat-box:hover {
            background: white;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
            line-height: 1;
        }
        .partner-logo {
            padding: 20px;
            background: white;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100px;
            border: 1px solid #eee;
            transition: all 0.3s;
        }
        .partner-logo:hover {
            border-color: var(--secondary);
            box-shadow: 0 5px 15px rgba(0, 168, 232, 0.1);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: var(--light);
            border-radius: 50px;
            text-decoration: none;
            color: var(--dark);
            transition: all 0.3s;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        .contact-info-box {
            padding: 25px;
            border-radius: 10px;
            background: white;
            border-left: 5px solid var(--primary);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--dark);
            border-color: var(--dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(10, 92, 184, 0.2);
        }
        footer {
            background: var(--dark);
            color: #bbb;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .display-4 {
                font-size: 2rem;
            }
            .stat-number {
                font-size: 2rem;
            }
        }