:root {
            --primary-color: #2c3e50;
            --secondary-color: #c19a6b;
            --accent-color: #7b8a8b;
            --light-color: #f8f9fa;
            --dark-color: #1a252f;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.7;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: all 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .navbar-toggler {
            border-color: var(--secondary-color);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28193, 154, 107, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .hero-section {
            background: linear-gradient(rgba(44, 62, 80, 0.85), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1513475382585-d06e58bcb0e0?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            max-width: 800px;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 12px 32px;
            font-weight: 600;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: #a87c4a;
            border-color: #a87c4a;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .section-title {
            position: relative;
            margin-bottom: 60px;
            text-align: center;
            color: var(--primary-color);
        }
        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            display: inline-block;
            position: relative;
            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%);
        }
        .section-title p {
            color: var(--accent-color);
            max-width: 700px;
            margin: 20px auto 0;
        }
        .card-hover {
            transition: all 0.3s ease;
            border: none;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-hover:hover .card-img-top {
            transform: scale(1.05);
        }
        .product-item {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .product-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(44, 62, 80, 0.85);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: all 0.3s ease;
        }
        .product-item:hover .product-overlay {
            opacity: 1;
        }
        .icon-box {
            background: var(--light-color);
            padding: 30px;
            text-align: center;
            border-radius: 8px;
            transition: all 0.3s ease;
            height: 100%;
        }
        .icon-box:hover {
            background: white;
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .icon-box i {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .partner-logo {
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 15px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .partner-logo:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .partner-logo img {
            max-width: 100%;
            max-height: 50px;
            filter: grayscale(100%);
            transition: filter 0.3s ease;
        }
        .partner-logo:hover img {
            filter: grayscale(0);
        }
        .friendlink {
            background: var(--light-color);
            padding: 80px 0;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px 10px;
            background: white;
            border-radius: 4px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #eaeaea;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .footer {
            background: var(--dark-color);
            color: #aaa;
            padding-top: 80px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            font-weight: 600;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background: var(--secondary-color);
            bottom: 0;
            left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .footer-contact li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        .footer-contact i {
            color: var(--secondary-color);
            margin-right: 12px;
            margin-top: 5px;
        }
        .copyright {
            background: rgba(0,0,0,0.2);
            padding: 20px 0;
            margin-top: 50px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.3rem;
            }
            .section-title h2 {
                font-size: 2rem;
            }
            .hero-section {
                padding: 150px 0 100px;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }