:root {
            --primary-color: #d63384;
            --secondary-color: #6f42c1;
            --accent-color: #20c997;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 600;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-brand i {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(214, 51, 132, 0.9) 0%, rgba(111, 66, 193, 0.85) 100%), url('https://images.unsplash.com/photo-1596462502278-27bfdc403348?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            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);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .btn-gradient {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-gradient:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(214, 51, 132, 0.3);
            color: white;
        }
        .product-img {
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .testimonial-card {
            border-left: 5px solid var(--primary-color);
            background-color: #f8f9fa;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 0 10px 10px 0;
        }
        .footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding-top: 3rem;
        }
        .footer a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink {
            background-color: #34495e;
            padding: 1.5rem 0;
            border-top: 1px solid #4a6278;
        }
        .flink {
            display: inline-block;
            margin: 0 10px;
            color: #95a5a6;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }
        .flink:hover {
            color: white;
            background-color: rgba(255,255,255,0.1);
            text-decoration: none;
        }
        .copyright {
            background-color: #1a252f;
            padding: 1.5rem 0;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .navbar {
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            transition: var(--transition);
            padding-top: 1rem;
            padding-bottom: 1rem;
        }
        .navbar.scrolled {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
            background-color: rgba(255,255,255,0.98);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s ease;
        }
        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(214, 51, 132, 0.25);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(214, 51, 132, 0.1);
            color: var(--primary-color);
        }
        .accordion-button:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(214, 51, 132, 0.25);
        }