:root {
            --cs-primary: #0056a6;
            --cs-secondary: #e63946;
            --cs-accent: #2a9d8f;
            --cs-light: #f8f9fa;
            --cs-dark: #212529;
            --cs-gray: #6c757d;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--cs-primary) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--cs-secondary) !important;
        }
        .cs-hero {
            background: linear-gradient(rgba(0, 40, 85, 0.85), rgba(0, 40, 85, 0.9)), url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0 7rem;
        }
        .cs-hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
        }
        @media (max-width: 768px) {
            .cs-hero h1 { font-size: 2.5rem; }
            .cs-hero { padding: 8rem 0 5rem; }
        }
        .cs-section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            font-weight: 700;
            color: var(--cs-dark);
        }
        .cs-section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--cs-secondary);
        }
        .cs-section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .cs-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .cs-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .cs-card-img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cs-card:hover .cs-card-img {
            transform: scale(1.05);
        }
        .cs-icon-box {
            width: 70px;
            height: 70px;
            background: var(--cs-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
        }
        .cs-bg-light {
            background-color: #f8fcff;
        }
        .cs-btn-primary {
            background: var(--cs-primary);
            border-color: var(--cs-primary);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
        }
        .cs-btn-primary:hover {
            background: #004085;
            border-color: #004085;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,86,166,0.3);
        }
        .cs-btn-secondary {
            background: var(--cs-secondary);
            border-color: var(--cs-secondary);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
        }
        .cs-btn-secondary:hover {
            background: #c1121f;
            border-color: #c1121f;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(230,57,70,0.3);
        }
        .cs-contact-info li {
            margin-bottom: 1rem;
            display: flex;
            align-items: flex-start;
        }
        .cs-contact-info i {
            color: var(--cs-primary);
            margin-right: 1rem;
            margin-top: 0.3rem;
            flex-shrink: 0;
        }
        footer {
            background: var(--cs-dark);
            color: #ddd;
        }
        .friendlink {
            background: #2c3e50;
            padding: 2rem 0;
        }
        .flink {
            display: inline-block;
            margin: 0.5rem 1rem;
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 0.95rem;
        }
        .flink:hover {
            color: white;
            text-decoration: underline;
        }
        .cs-back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--cs-primary);
            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: all 0.4s ease;
            z-index: 1000;
        }
        .cs-back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .cs-back-to-top:hover {
            background: var(--cs-secondary);
            color: white;
        }