:root {
            --primary-color: #0056b3;
            --secondary-color: #17a2b8;
            --dark-color: #343a40;
            --light-color: #f8f9fa;
            --success-color: #28a745;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand i {
            color: var(--secondary-color);
            margin-right: 8px;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(0, 86, 179, 0.9) 0%, rgba(23, 162, 184, 0.85) 100%), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 150px 0 100px;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 25px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 120px 0 80px;
            }
        }
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .icon-box {
            width: 80px;
            height: 80px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            transition: var(--transition);
        }
        .card-hover:hover .icon-box {
            background: var(--secondary-color);
            transform: rotateY(180deg);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #004494;
            border-color: #004494;
            transform: translateY(-2px);
        }
        .btn-outline-primary {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .feature-list li {
            margin-bottom: 10px;
            padding-left: 25px;
            position: relative;
        }
        .feature-list li:before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--success-color);
            position: absolute;
            left: 0;
        }
        .progress {
            height: 10px;
            margin-bottom: 20px;
        }
        .progress-bar {
            background-color: var(--primary-color);
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-member img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            border: 5px solid #eee;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .team-member:hover img {
            border-color: var(--primary-color);
        }
        .social-icons a {
            display: inline-block;
            width: 36px;
            height: 36px;
            background: #eee;
            color: #555;
            border-radius: 50%;
            text-align: center;
            line-height: 36px;
            margin: 0 5px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--dark-color);
            color: #bbb;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 1px solid #555;
        }
        .copyright {
            border-top: 1px solid #555;
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.9rem;
        }
        .friendlink {
            background-color: #f9f9f9;
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background: white;
            border: 1px solid #ddd;
            border-radius: 4px;
            color: #555;
            text-decoration: none;
            transition: var(--transition);
            font-weight: 500;
        }
        .flink:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
        }
        .contact-info i {
            width: 30px;
            color: var(--primary-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(0, 86, 179, 0.25);
        }
        .nav-link {
            font-weight: 500;
            transition: var(--transition);
            margin: 0 5px;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-5px);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -33px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: white;
            border: 3px solid var(--primary-color);
        }