:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        .nav-bar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }
        .nav-bar.scrolled {
            padding: 8px 0;
            background-color: rgba(255, 255, 255, 0.98);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title h2 {
            font-weight: 700;
            color: var(--primary-color);
            display: inline-block;
            padding-bottom: 15px;
        }
        .section-title h2:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .feature-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            background: white;
        }
        .feature-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), #2d4a7c);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: -40px auto 20px;
            color: white;
            font-size: 2rem;
            box-shadow: 0 6px 15px rgba(26, 54, 93, 0.3);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: var(--gray-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .project-card {
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
            transition: all 0.4s ease;
            height: 100%;
        }
        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .project-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(26, 54, 93, 0.9), transparent);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 2rem;
            color: white;
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        .project-card:hover .project-overlay {
            opacity: 1;
        }
        .btn-primary-custom {
            background: linear-gradient(to right, var(--primary-color), #2d4a7c);
            border: none;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 600;
            letter-spacing: 1px;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(26, 54, 93, 0.3);
            background: linear-gradient(to right, #2d4a7c, var(--primary-color));
        }
        .contact-info-box {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: transform 0.3s ease;
        }
        .contact-info-box:hover {
            transform: translateY(-8px);
        }
        .flink {
            display: inline-block;
            padding: 10px 24px;
            margin: 8px;
            background: #f8f9fa;
            border-radius: 8px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(26, 54, 93, 0.2);
        }
        footer {
            background-color: var(--primary-color);
            color: rgba(255, 255, 255, 0.85);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-link:hover {
            color: white;
            text-decoration: underline;
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary-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:nth-child(odd) {
            left: 0;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            position: relative;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        }
        @media screen and (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .hero-section {
                padding: 140px 0 80px;
            }
        }
        .news-card {
            border-left: 4px solid var(--primary-color);
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-left-color: var(--secondary-color);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }