/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
}

/* 标题样式 */
h1, h2, h3 {
    margin-bottom: 20px;
    font-weight: 700;
}

h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #2c3e50;
}

/* 导航栏样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #007bff;
}

.logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav ul {
    display: flex;
    list-style: none;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav ul li a:hover {
    color: #007bff;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #333;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 120px 0 80px;
    text-align: center;
    margin-top: 70px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* 关于我们样式 */
.about {
    padding: 80px 0;
    background-color: #fff;
}

.about-content {
    display: flex;
    gap: 40px;
    align-items: center;
}

.about-text {
    flex: 1;
    font-size: 18px;
    line-height: 1.8;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 商品分类样式 */
.products {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.product-item i {
    font-size: 48px;
    color: #007bff;
    margin-bottom: 20px;
}

.product-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

/* 支付方式样式 */
.payment {
    padding: 80px 0;
    background-color: #fff;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.payment-item {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.payment-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.payment-item i {
    font-size: 64px;
    margin-bottom: 20px;
}

.payment-item:nth-child(1) i {
    color: #f7931a;
}

.payment-item:nth-child(2) i {
    color: #07c160;
}

.payment-item:nth-child(3) i {
    color: #1677ff;
}

.payment-item h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

/* 优势特点样式 */
.features {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.feature-item i {
    font-size: 48px;
    color: #007bff;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

/* 联系我们样式 */
.contact {
    padding: 80px 0;
    background-color: #fff;
}

.contact-content {
    display: flex;
    gap: 40px;
}

.contact-info {
    flex: 1;
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 8px;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
}

.contact-info p {
    margin-bottom: 20px;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-form {
    flex: 2;
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    font-family: 'Noto Sans SC', sans-serif;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

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

/* 页脚样式 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
}

.footer-logo i {
    margin-right: 10px;
    font-size: 28px;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #007bff;
}

.footer-copyright {
    margin-top: 20px;
    opacity: 0.8;
    font-size: 14px;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    animation: slideIn 0.3s ease;
}

.modal-content i {
    font-size: 64px;
    color: #28a745;
    margin-bottom: 20px;
}

.modal-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #28a745;
}

.modal-content p {
    font-size: 16px;
    margin-bottom: 0;
}

.close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: #666;
    transition: color 0.3s ease;
}

.close:hover {
    color: #333;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content,
    .contact-content {
        flex-direction: column;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #fff;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        padding: 20px;
    }
    
    .nav.active {
        display: block;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav ul li {
        margin-left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    .about,
    .products,
    .payment,
    .features,
    .contact {
        padding: 60px 0;
    }
    
    .products-grid,
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .payment-methods {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 24px;
    }
    
    .hero p {
        font-size: 14px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .about-text,
    .contact-info p {
        font-size: 16px;
    }
    
    .product-item,
    .feature-item {
        padding: 20px;
    }
    
    .product-item i,
    .feature-item i {
        font-size: 36px;
    }
    
    .payment-item {
        padding: 30px;
    }
    
    .payment-item i {
        font-size: 48px;
    }
    
    .contact-info,
    .contact-form {
        padding: 20px;
    }
}