/* 根变量 */
:root {
    --amazon-orange: #ff9900;
    --amazon-blue: #232f3e;
    --amazon-dark: #131921;
    --amazon-light: #f8f9fa;
    --amazon-gray: #6c757d;
    --amazon-success: #28a745;
    --amazon-danger: #dc3545;
    --amazon-warning: #ffc107;
    --amazon-info: #17a2b8;
    
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    
    --border-color: #ddd;
    --border-light: #eee;
    
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    
    --border-radius: 8px;
    --border-radius-sm: 4px;
    
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #fff;
}

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

/* Header */
header {
    background: var(--amazon-dark);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo i {
    color: var(--amazon-orange);
    font-size: 2rem;
}

.logo .click {
    color: var(--amazon-orange);
}

/* 导航 */
nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 0;
    position: relative;
}

nav a:hover,
nav a.active {
    color: var(--amazon-orange);
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--amazon-orange);
}

/* 搜索栏 */
.search-bar {
    display: flex;
    align-items: center;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.search-bar input {
    border: none;
    padding: 12px 15px;
    width: 300px;
    font-size: 0.95rem;
    outline: none;
}

.search-bar button {
    background: var(--amazon-orange);
    border: none;
    padding: 12px 15px;
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.search-bar button:hover {
    background: #e68900;
}

/* 移动菜单按钮 */
.mobile-menu-btn {
    display: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--amazon-blue) 0%, var(--amazon-dark) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--amazon-orange);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: #e68900;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    background: transparent;
    border: 2px solid white;
    color: white;
    margin-left: 15px;
}

.btn-outline:hover {
    background: white;
    color: var(--amazon-dark);
}

/* 主要内容 */
.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    padding: 40px 0;
}

/* 左侧内容 */
.content-left {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--amazon-blue);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--amazon-orange);
}

/* 博客网格 */
.blog-grid {
    display: grid;
    gap: 30px;
}

.blog-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.blog-img {
    height: 200px;
    overflow: hidden;
}

.blog-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card:hover .blog-img img {
    transform: scale(1.05);
}

.blog-content {
    padding: 25px;
}

.category-tag {
    display: inline-block;
    padding: 5px 12px;
    background: var(--amazon-orange);
    color: white;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.category-tag.electronics {
    background: #007bff;
}

.category-tag.home {
    background: var(--amazon-success);
}

.category-tag.health {
    background: var(--amazon-danger);
}

.category-tag.trending {
    background: var(--amazon-warning);
    color: var(--amazon-dark);
}

.blog-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--amazon-blue);
}

.blog-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.blog-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.blog-meta i {
    margin-right: 5px;
}

.amazon-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--amazon-orange);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.9rem;
}

.amazon-btn:hover {
    background: #e68900;
    transform: translateY(-1px);
}

/* 分类部分 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.category-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.category-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: white;
}

.category-icon.electronics {
    background: #007bff;
}

.category-icon.home {
    background: var(--amazon-success);
}

.category-icon.health {
    background: var(--amazon-danger);
}

.category-icon.trending {
    background: var(--amazon-warning);
    color: var(--amazon-dark);
}

.category-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--amazon-blue);
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.widget {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.widget-title {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--amazon-blue);
    border-bottom: 2px solid var(--amazon-orange);
    padding-bottom: 10px;
}

/* 热门产品 */
.popular-products {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.product {
    display: flex;
    gap: 15px;
    padding: 15px;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.product:hover {
    border-color: var(--amazon-orange);
    box-shadow: var(--shadow);
}

.product-img {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

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

.product-info {
    flex: 1;
}

.product-info h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--amazon-blue);
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 8px;
}

.product-rating i {
    color: var(--amazon-orange);
    font-size: 0.9rem;
}

.product-rating span {
    color: var(--text-light);
    font-size: 0.8rem;
}

.product-price {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--amazon-orange);
    margin-bottom: 10px;
}

/* Footer */
footer {
    background: var(--amazon-dark);
    color: white;
    padding: 50px 0 20px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--amazon-orange);
}

.footer-col p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--amazon-orange);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: #e68900;
    transform: translateY(-2px);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--amazon-orange);
}

.footer-links i {
    margin-right: 8px;
    color: var(--amazon-orange);
}

.copyright {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
}

.copyright p {
    color: #ccc;
    margin-bottom: 15px;
}

.affiliate-disclaimer {
    background: rgba(255,255,255,0.05);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-top: 20px;
}

.affiliate-disclaimer p {
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 10px;
}

.affiliate-disclaimer .amazon-logo {
    color: var(--amazon-orange);
    font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    nav {
        order: 3;
        width: 100%;
        display: none;
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-bar input {
        width: 200px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .btn-outline {
        margin-left: 0;
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .blog-content {
        padding: 20px;
    }
    
    .category-card {
        padding: 20px;
    }
    
    .widget {
        padding: 20px;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.blog-card,
.category-card,
.widget {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--amazon-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 通知样式 */
.alert {
    padding: 15px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    border-color: var(--amazon-success);
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    border-color: var(--amazon-danger);
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    border-color: var(--amazon-warning);
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    border-color: var(--amazon-info);
    color: #0c5460;
}