:root {
            --primary-color: #1a365d;
            --secondary-color: #d4a017;
            --accent-color: #2d4a8c;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --success-color: #28a745;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--dark-color);
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            transition: var(--transition);
            border-radius: 4px;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
            background-color: rgba(212, 160, 23, 0.1);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1556761175-b413da4baf72?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1470&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 120px 0;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero-subtitle {
            font-size: 1.4rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: var(--primary-color);
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #c19115;
            border-color: #c19115;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .section-title {
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 1rem;
            position: relative;
            padding-bottom: 15px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .section-title.center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background-color: rgba(212, 160, 23, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--secondary-color);
            font-size: 1.8rem;
        }
        .project-card {
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .project-card img {
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .stats-section {
            background-color: var(--primary-color);
            color: white;
            padding: 80px 0;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--secondary-color);
            margin-bottom: 0.5rem;
        }
        .stat-text {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 1rem;
            border: 5px solid rgba(212, 160, 23, 0.2);
            transition: var(--transition);
        }
        .team-member:hover .team-img {
            border-color: var(--secondary-color);
        }
        .team-name {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.3rem;
        }
        .team-position {
            color: var(--accent-color);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1.5rem;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: rgba(212, 160, 23, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary-color);
            font-size: 1.3rem;
            margin-right: 1rem;
            flex-shrink: 0;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: white;
            border-radius: 30px;
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #e9ecef;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .footer {
            background-color: var(--primary-color);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-weight: 600;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--secondary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            background-color: white;
            border: 4px solid var(--secondary-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }
        .left {
            left: 0;
        }
        .right {
            left: 50%;
        }
        .left::after {
            right: -12px;
        }
        .right::after {
            left: -12px;
        }
        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item::after {
                left: 20px;
            }
            .right {
                left: 0;
            }
        }
        .news-card {
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border: 1px solid #e9ecef;
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .news-date {
            background-color: var(--secondary-color);
            color: var(--primary-color);
            padding: 8px 15px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 1rem;
        }
        .form-control-custom {
            border-radius: 5px;
            border: 1px solid #ced4da;
            padding: 12px 15px;
            transition: var(--transition);
        }
        .form-control-custom:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(212, 160, 23, 0.25);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #c19115;
            transform: translateY(-5px);
        }