/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.navbar {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 70px;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo h1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-logo h1::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 8px;
    z-index: -1;
    opacity: 0.1;
    filter: blur(8px);
}

.nav-logo h1::after {
    content: '✨';
    position: absolute;
    top: -5px;
    right: -15px;
    font-size: 0.8rem;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.7; }
    50% { transform: scale(1.2) rotate(180deg); opacity: 1; }
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.cart-btn {
    position: relative;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid transparent;
    background-clip: padding-box;
    font-size: 1.5rem;
    color: #666;
    cursor: pointer;
    padding: 12px;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.cart-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* 主要内容区域 */
.main-content {
    margin-top: 70px;
}

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    color: white;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 25px;
    font-weight: 800;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

.hero-content p {
    font-size: 1.3rem;
    opacity: 0.95;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease-out 0.2s both;
    line-height: 1.6;
}

/* 商品展示区域 */
.products-section {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 60px;
    color: #333;
    font-weight: 700;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: pointer;
    position: relative;
    border: 1px solid rgba(255,255,255,0.8);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.product-image {
    width: 100%;
    height: 240px;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: 25px;
    position: relative;
    z-index: 2;
}

.product-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #333;
    line-height: 1.4;
}

.product-description {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 18px;
    line-height: 1.6;
}

.product-price {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.add-to-cart-btn {
    width: 100%;
    background: linear-gradient(135deg, #10ac84 0%, #06a085 100%);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(16, 172, 132, 0.3);
    position: relative;
    overflow: hidden;
}

.add-to-cart-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.add-to-cart-btn:hover::before {
    left: 100%;
}

.add-to-cart-btn:hover {
    background: linear-gradient(135deg, #0e9f6e 0%, #059669 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 172, 132, 0.4);
}

/* 购物车侧边栏 */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    box-shadow: -10px 0 30px rgba(0,0,0,0.15);
    z-index: 1001;
    transition: right 0.4s ease;
    display: flex;
    flex-direction: column;
    border-left: 1px solid rgba(102, 126, 234, 0.1);
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    padding: 25px;
    border-bottom: 2px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.cart-header h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: white;
}

.close-cart {
    background: rgba(255,255,255,0.2);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-cart:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.1);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 25px;
}

.cart-item {
    display: flex;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
    transition: all 0.3s ease;
}

.cart-item:hover {
    background: rgba(102, 126, 234, 0.05);
    border-radius: 10px;
    margin: 0 -10px;
    padding: 20px 10px;
}

.cart-item-image {
    width: 70px;
    height: 70px;
    background: #f8f9fa;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.cart-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cart-item-info {
    flex: 1;
}

.cart-item-title {
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: #333;
}

.cart-item-price {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.1rem;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
}

.quantity-btn {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid #dee2e6;
    width: 35px;
    height: 35px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    transition: all 0.3s ease;
}

.quantity-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    transform: scale(1.1);
}

.cart-footer {
    padding: 25px;
    border-top: 2px solid #f0f0f0;
    background: white;
}

.cart-total {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 25px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.checkout-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 18px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: 700;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.checkout-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.checkout-btn:hover::before {
    left: 100%;
}

.checkout-btn:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1002;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    animation: modalSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 20px 20px 0 20px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
    z-index: 10;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    position: absolute;
    left: 20px;
    color: #333;
    font-weight: 700;
}

.close-modal {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid #dee2e6;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.close-modal:hover {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: white;
    border-color: transparent;
    transform: scale(1.1);
    box-shadow: 0 6px 18px rgba(220, 53, 69, 0.3);
}

/* 商品详情模态框 */
.product-detail {
    max-width: 700px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.product-detail-content {
    padding: 0;
    overflow-y: auto;
    flex: 1;
}

.product-detail-image {
    width: 100%;
    height: 350px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    margin-bottom: 0;
}

.product-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-detail-image:hover img {
    transform: scale(1.05);
}

.product-detail-info {
    padding: 30px;
}

.product-detail h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #333;
    font-weight: 700;
    line-height: 1.3;
}

.product-detail-price {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: block;
}

.product-detail-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 30px;
    font-size: 1rem;
    text-align: justify;
}

.product-detail-actions {
    display: flex;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.detail-add-to-cart-btn {
    flex: 1;
    background: linear-gradient(135deg, #10ac84 0%, #06a085 100%);
    color: white;
    border: none;
    padding: 18px 30px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 6px 20px rgba(16, 172, 132, 0.3);
    position: relative;
    overflow: hidden;
}

.detail-add-to-cart-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.detail-add-to-cart-btn:hover::before {
    left: 100%;
}

.detail-add-to-cart-btn:hover {
    background: linear-gradient(135deg, #0e9f6e 0%, #059669 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 172, 132, 0.4);
}

/* 登录表单 */
.login-form-content {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}

.verification-input {
    display: flex;
    gap: 10px;
}

.verification-input input {
    flex: 1;
}

.send-code-btn {
    background: #6c757d;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.send-code-btn:hover {
    background: #545b62;
}

.send-code-btn:disabled {
    background: #adb5bd;
    cursor: not-allowed;
}

.login-submit-btn {
    width: 100%;
    background: #007bff;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.login-submit-btn:hover {
    background: #0056b3;
}

/* 支付模态框 */
.payment-modal {
    max-width: 400px;
    text-align: center;
}

.payment-content {
    padding: 40px;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.payment-content h3 {
    color: #333;
    margin-bottom: 10px;
}

.payment-content p {
    color: #666;
}

/* 遮罩层 */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    display: none;
    z-index: 999;
}

.overlay.show {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-logo h1 {
        font-size: 1.5rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .cart-sidebar {
        width: 100%;
        right: -100%;
    }
    
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .verification-input {
        flex-direction: column;
    }
    
    .send-code-btn {
        width: 100%;
    }
    
    .product-detail-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .products-section {
        padding: 60px 0;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
}

/* 滚动条样式 */
.cart-items::-webkit-scrollbar {
    width: 6px;
}

.cart-items::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.cart-items::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.cart-items::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 底部导航栏样式 */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 50%, #2c3e50 100%);
    color: white;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="footergrid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23footergrid)"/></svg>');
    opacity: 0.3;
}

.footer-content {
    position: relative;
    z-index: 2;
    padding: 60px 0 20px;
}

.footer-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-section h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.footer-description {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.footer-links li:hover {
    transform: translateX(5px);
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding-left: 15px;
}

.footer-links a::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #667eea;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
    padding-left: 20px;
}

.footer-links a:hover::before {
    color: #764ba2;
    transform: translateX(3px);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #bdc3c7;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.contact-item:hover {
    color: #667eea;
    transform: translateX(5px);
}

.contact-item i {
    color: #667eea;
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 30px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    gap: 40px;
}

.footer-bottom h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #ecf0f1;
    font-weight: 600;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
    text-decoration: none;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.social-icon:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.payment-icons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.payment-icon {
    font-size: 1.8rem;
    filter: grayscale(50%);
    transition: all 0.3s ease;
}

.payment-icon:hover {
    filter: grayscale(0%);
    transform: scale(1.2);
}

.payment-text {
    color: #bdc3c7;
    font-size: 0.9rem;
    margin-left: 10px;
}

.footer-copyright {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 0;
    margin-top: 20px;
    gap: 20px;
}

.copyright-text {
    color: #bdc3c7;
    font-size: 0.9rem;
    line-height: 1.5;
}

.copyright-text p:first-child {
    margin-bottom: 5px;
    font-weight: 600;
}

.copyright-text a {
    color: #bdc3c7;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0 5px;
}

.copyright-text a:hover {
    color: #667eea;
}

.certifications {
    display: flex;
    gap: 15px;
}

.cert-badge {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border: 1px solid rgba(102, 126, 234, 0.3);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #667eea;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cert-badge:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

/* 响应式设计 - Footer */
@media (max-width: 768px) {
    .footer-sections {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 25px;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .payment-icons {
        justify-content: center;
    }
    
    .footer-copyright {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .certifications {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .footer-content {
        padding: 40px 0 20px;
    }
    
    .footer {
        margin-top: 60px;
    }
}

@media (max-width: 480px) {
    .footer-sections {
        gap: 25px;
    }
    
    .footer-section h3 {
        font-size: 1.2rem;
    }
    
    .social-icons {
        gap: 10px;
    }
    
    .social-icon {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .certifications {
        gap: 8px;
    }
    
    .cert-badge {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
}

/* 响应式设计 - 商品详情 */
@media (max-width: 768px) {
    .product-detail {
        max-width: 95%;
        margin: 10px;
    }
    
    .product-detail-image {
        height: 250px;
    }
    
    .product-detail-info {
        padding: 20px;
    }
    
    .product-detail h3 {
        font-size: 1.5rem;
    }
    
    .product-detail-price {
        font-size: 1.8rem;
    }
    
    .product-detail-description {
        font-size: 0.95rem;
    }
    
    .product-detail-actions {
        flex-direction: column;
    }
    
    .detail-add-to-cart-btn {
        padding: 15px;
        font-size: 1rem;
    }
    
    .modal-header {
        padding: 15px 15px 0 15px;
    }
    
    .modal-header h3 {
        left: 15px;
        font-size: 1.3rem;
    }
    
    .close-modal {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .product-detail-image {
        height: 200px;
    }
    
    .product-detail-info {
        padding: 15px;
    }
    
    .product-detail h3 {
        font-size: 1.3rem;
        margin-bottom: 12px;
    }
    
    .product-detail-price {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .product-detail-description {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }
    
    .product-detail-actions {
        padding-top: 15px;
    }
}