:root {
            --primary-color: #1a365d;
            --secondary-color: #2d3748;
            --accent-color: #c53030;
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        .text-primary { color: var(--primary-color) !important; }
        .bg-primary { background-color: var(--primary-color) !important; }
        .bg-secondary { background-color: var(--secondary-color) !important; }
        .text-accent { color: var(--accent-color) !important; }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
            padding: 0.8rem 0;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            color: var(--dark-color);
            font-weight: 500;
            padding: 0.5rem 1rem;
            margin: 0 0.2rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover {
            color: var(--accent-color);
            background-color: rgba(197, 48, 48, 0.05);
        }
        .navbar-nav .nav-link.active {
            color: var(--accent-color);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1441986300917-64674bd600d8?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        .card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background-color: rgba(197, 48, 48, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: var(--accent-color);
            font-size: 1.8rem;
            transition: var(--transition);
        }
        .feature-box:hover .icon-box {
            background-color: var(--accent-color);
            color: white;
            transform: rotateY(180deg);
        }
        footer {
            background-color: var(--secondary-color);
            color: #e2e8f0;
            padding-top: 3rem;
        }
        footer h5 {
            color: white;
            font-weight: 600;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        footer h5:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background-color: var(--accent-color);
        }
        footer a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-bottom {
            background-color: var(--primary-color);
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        friendlink {
            display: block;
            margin-top: 2rem;
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            color: #cbd5e0;
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .flink:hover {
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .navbar-nav .nav-link {
                padding: 0.5rem 0;
                margin: 0;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease forwards;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .product-item {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .product-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(26, 54, 93, 0.85);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: var(--transition);
            padding: 2rem;
            color: white;
        }
        .product-item:hover .product-overlay {
            opacity: 1;
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: var(--accent-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -2.35rem;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background-color: var(--accent-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--accent-color);
        }
        .form-control:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(197, 48, 48, 0.25);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        .btn-accent {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: white;
        }
        .btn-accent:hover {
            background-color: #9b2c2c;
            border-color: #9b2c2c;
            color: white;
        }
        .reveal {
            position: relative;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.8s ease;
        }
        .reveal.active {
            transform: translateY(0);
            opacity: 1;
        }
        .breadcrumb {
            background-color: rgba(247, 250, 252, 0.8);
            border-radius: 0;
            padding: 1rem 0;
            margin-bottom: 0;
        }
        .breadcrumb-item a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--accent-color);
        }