:root {
            --primary-color: #1a5f7a;
            --secondary-color: #2a9d8f;
            --accent-color: #e76f51;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 95, 122, 0.85), rgba(42, 157, 143, 0.8)), url('https://images.unsplash.com/photo-1607082348824-0a96f2a4b9da?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            color: var(--primary-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: all 0.3s ease;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .product-card {
            overflow: hidden;
            border-radius: 12px;
        }
        .product-card img {
            transition: transform 0.5s ease;
            height: 220px;
            object-fit: cover;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f8f9fa;
            border-radius: 30px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        .contact-info {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.5rem;
        }
        footer {
            background: var(--dark-color);
            color: #adb5bd;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            color: white;
            text-decoration: none;
            transition: background 0.3s;
        }
        .social-icon:hover {
            background: var(--primary-color);
            color: white;
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        .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;
            text-decoration: none;
            opacity: 0;
            transition: opacity 0.3s;
            z-index: 1000;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .stats-counter {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .contact-info {
                padding: 20px;
            }
        }