/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #ff6b6b;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #ff5252;
    transform: translateY(-2px);
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 28px;
    color: #333;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #ff6b6b;
}

/* 头部导航 */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    min-height: 60px;
}

.logo h1 {
    font-size: 18px;
    font-weight: bold;
    color: #ff6b6b;
    white-space: nowrap;
    margin-right: 20px;
    min-width: 180px;
}

nav {
    flex: 1;
    max-width: 900px;
}

nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 12px;
}

nav ul li a {
    font-size: 14px;
    font-weight: 500;
    padding: 8px;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

nav ul li a:hover,
nav ul li a.active {
    color: #ff6b6b;
    border-bottom: 2px solid #ff6b6b;
}

.user-actions {
    display: flex;
    align-items: center;
    white-space: nowrap;
    margin-left: 20px;
    min-width: 200px;
    justify-content: flex-end;
}

.user-actions a {
    margin-left: 15px;
    font-size: 14px;
}

.user-actions .user-menu {
    margin-left: 15px;
}

.user-actions a:hover {
    color: #ff6b6b;
}

.cart i, .login i {
    margin-right: 5px;
}

/* 轮播图 */
.banner {
    padding: 40px 0;
    background-color: #f1f2f6;
}

.slider {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    height: 400px;
}

.slide {
    display: none;
    position: relative;
}

.slide.active {
    display: block;
}

.slide img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 50px;
    transform: translateY(-50%);
    color: #fff;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    max-width: 500px;
}

.slide-content h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.slide-content p {
    font-size: 18px;
    margin-bottom: 20px;
}

.slider-dots {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    background-color: #ddd;
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background-color: #ff6b6b;
    transform: scale(1.2);
}

/* 分类模块 */
.categories {
    padding: 60px 0;
    background-color: #fff;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.category-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.category-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.category-card h3 {
    padding: 15px 0;
    font-size: 18px;
}

.category-card .btn {
    margin-bottom: 20px;
    padding: 8px 15px;
    font-size: 14px;
}

/* 商品模块 */
.featured-products {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    padding-bottom: 20px;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.product-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: #ff6b6b;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-card h3 {
    padding: 15px 15px 10px;
    font-size: 16px;
    height: 60px;
    overflow: hidden;
}

.product-price {
    padding: 0 15px 10px;
    display: flex;
    align-items: center;
}

.original-price {
    color: #999;
    text-decoration: line-through;
    font-size: 14px;
    margin-right: 10px;
}

.current-price {
    color: #ff6b6b;
    font-size: 18px;
    font-weight: bold;
}

.product-rating {
    padding: 0 15px 15px;
    color: #ffc107;
    font-size: 14px;
}

.product-rating span {
    color: #999;
    margin-left: 5px;
}

.add-to-cart {
    margin: 0 15px;
    width: calc(100% - 30px);
    padding: 10px;
    background-color: #ff6b6b;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.add-to-cart:hover {
    background-color: #ff5252;
}

.view-more {
    text-align: center;
    margin-top: 40px;
}

/* 特性模块 */
.features {
    padding: 60px 0;
    background-color: #fff;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    background-color: #f8f9fa;
}

.feature-card:hover {
    background-color: #ff6b6b;
    color: #fff;
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 36px;
    margin-bottom: 15px;
    color: #ff6b6b;
}

.feature-card:hover i {
    color: #fff;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

/* 底部导航 */
footer {
    background-color: #2d3436;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: #ff6b6b;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #ddd;
    transition: all 0.3s ease;
}

.footer-column ul li a:hover {
    color: #ff6b6b;
    padding-left: 5px;
}

.social-media {
    display: flex;
    margin-bottom: 20px;
}

.social-media a {
    width: 36px;
    height: 36px;
    background-color: #444;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 10px;
    transition: all 0.3s ease;
    color: #fff;
}

.social-media a:hover {
    background-color: #ff6b6b;
    transform: translateY(-3px);
}

.contact-info p {
    margin-bottom: 10px;
    color: #ddd;
    word-break: keep-all;
}

.contact-info i {
    margin-right: 10px;
    color: #ff6b6b;
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 14px;
}

.footer-bottom a {
    color: #aaa;
    /* text-decoration: underline; */
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #ff6b6b;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    nav ul li {
        margin: 0 8px;
    }
    
    .logo h1 {
        min-width: 160px;
    }
}

@media (max-width: 1024px) {
    .category-grid,
    .product-grid,
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    nav ul li {
        margin: 0 6px;
    }
    
    nav ul li a {
        font-size: 13px;
        padding: 6px 4px;
    }
    
    .logo h1 {
        min-width: 140px;
        font-size: 16px;
    }
    
    .user-actions {
        min-width: 180px;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        padding: 10px;
    }
    
    .logo h1 {
        margin-right: 0;
        margin-bottom: 10px;
        min-width: auto;
        text-align: center;
    }
    
    nav {
        width: 100%;
        order: 3;
        max-width: none;
    }
    
    nav ul {
        margin: 15px 0;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        padding: 0;
    }
    
    nav ul li {
        margin: 0;
    }
    
    .user-actions {
        width: 100%;
        margin-left: 0;
        justify-content: center;
        margin-top: 15px;
        min-width: auto;
        order: 2;
    }
    
    .category-grid,
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .slide-content {
        left: 30px;
    }
    
    .slide-content h2 {
        font-size: 28px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .contact-info p {
        white-space: normal;
        word-break: break-all;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        padding: 0;
        margin: 10px 0;
        gap: 8px;
    }
    
    nav ul li {
        margin: 0;
    }
    
    nav ul li a {
        font-size: 12px;
        padding: 5px;
    }
    
    .user-actions {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .user-actions a,
    .user-actions .user-menu {
        margin: 0 5px;
    }
    
    .logo h1 {
        font-size: 16px;
    }
    
    header .container {
        padding: 10px 5px;
    }
    
    .category-grid,
    .product-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .slider {
        height: 300px;
    }
    
    .slide img {
        height: 300px;
    }
    
    .slide-content {
        left: 20px;
        max-width: 300px;
    }
    
    .slide-content h2 {
        font-size: 24px;
    }
    
    .slide-content p {
        font-size: 16px;
    }
}