:root {
            --primary-color: #1a3a6c;
            --secondary-color: #d32f2f;
            --accent-color: #ffc107;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gradient-bg: linear-gradient(135deg, var(--primary-color) 0%, #2c5282 100%);
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .hero-section {
            background: var(--gradient-bg);
            color: white;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 20px;
            margin-bottom: 40px;
            font-weight: 700;
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .btn-custom {
            background: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
        }
        .btn-custom:hover {
            background: #b71c1c;
            color: white;
            transform: scale(1.05);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            color: var(--primary-color) !important;
            font-size: 1.8rem;
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            margin: 0 10px;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .stats-box {
            background: white;
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
            transition: all 0.3s ease;
        }
        .stats-box:hover {
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .stats-box i {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 15px;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 12px 25px;
            background: white;
            border-radius: 50px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-5px);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: rotate(15deg);
        }
        .methodology-step {
            border-left: 3px solid var(--accent-color);
            padding-left: 20px;
            margin-bottom: 30px;
        }
        .news-card img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 50px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .flink {
                display: block;
                margin: 10px auto;
                max-width: 250px;
            }
        }