/* 全局样式 */
:root {
    --primary-color: #4a6572;
    --primary-light: #e0e7ea;
    --primary-dark: #3a4f5a;
    --secondary-color: #f8f9fa;
    --text-color: #212529;
    --text-secondary: #6c757d;
    --border-color: #e9ecef;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --transition: all 0.2s ease;
    --border-radius: 6px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 5px;
    --spacing-lg: 24px;
    --spacing-ss: 16px;
    --spacing-xl: 8px;
    --spacing-x2: 40px;
    --spacing-xxl: 48px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 顶部导航栏 */
.header {
    background-color: #fff;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: auto;
    min-height: 64px;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.logo-icon {
    margin-right: var(--spacing-sm);
    font-size: 1.5rem;
}

.logo-link {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.logo-link:hover {
    color: var(--primary-dark);
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: flex-end;
    align-items: center;
    max-width: calc(100% - 200px); /* 给logo预留空间 */
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
    white-space: nowrap;
    min-width: fit-content;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

/* 主要内容区 */
.main {
    min-height: calc(100vh - 64px - 80px); /* 减去头部和底部高度 */
}

/* 搜索区域 */
.search-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-xxl) 0;
}

.search-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-x2);
    color: var(--primary-color);
    letter-spacing: 1px;
}

.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-form {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #fff;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.search-input {
    flex: 1;
    border: none;
    padding: var(--spacing-ss) var(--spacing-lg);
    font-size: 1rem;
    outline: none;
}

.search-btn {
    background-color: var(--primary-color);
    border: none;
    padding: var(--spacing-md);
    cursor: pointer;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-btn:hover {
    background-color: var(--primary-dark);
}

.search-btn .icon {
    width: 20px;
    height: 20px;
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: white;
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-md);
    z-index: 10;
    max-height: 200px;
    overflow-y: auto;
}

.search-suggestion {
    padding: var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
}

.search-suggestion:last-child {
    border-bottom: none;
}

.search-suggestion:hover {
    background-color: var(--secondary-color);
}

.search-history {
    margin-top: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
}

.history-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.clear-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
}

.clear-btn:hover {
    color: var(--text-color);
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.history-item {
    background-color: var(--secondary-color);
    border-radius: 16px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.history-item:hover {
    background-color: var(--primary-light);
}

/* 分类区域 */
.categories-section {
    padding: var(--spacing-xl) 0;
}

.categories-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.subcategories-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* 确保分类名称标题与下方内容之间的间距与首页一致 */
.subcategories-container .home-sites-title {
    margin-bottom: var(--spacing-lg);
}

.category {
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

.category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.category-content {
    padding: var(--spacing-md);
}

.subcategory-module {
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    margin-bottom: var(--spacing-xl);
}

.subcategory-module:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.subcategory-module:last-child {
    margin-bottom: 0;
}

.subcategory-title {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

.site-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    text-align: center;
}

.site-card:hover {
    background-color: var(--secondary-color);
    border-color: var(--primary-color);
}

.site-icon {
    width: 32px;
    height: 32px;
    margin-bottom: var(--spacing-xs);
    border-radius: 50%;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.site-name {
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.site-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    box-orient: vertical;
    overflow: hidden;
}

/* 页脚 */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 200;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.close-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    color: var(--text-secondary);
}

.close-btn:hover {
    color: var(--text-color);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.modal-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.visit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.visit-btn:hover {
    background-color: var(--primary-dark);
}

.copy-btn {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.copy-btn:hover {
    background-color: var(--primary-light);
}

.modal-url {
    font-family: monospace;
    background-color: var(--secondary-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    word-break: break-all;
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: var(--primary-dark);
    color: white;
    text-align: center;
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.2s;
    font-size: 0.8rem;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* 通用类 */
.hidden {
    display: none;
}

.text-center {
    text-align: center;
}

/* 首页推荐网站标题样式 */
.home-sites-title {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header .container {
        flex-direction: column;
        height: auto;
        padding: var(--spacing-md) 0;
        gap: var(--spacing-md);
    }
    
    .nav {
        width: 100%;
        justify-content: center;
        margin: 0;
        max-width: 100%;
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.9rem;
    }
    
    .main {
        min-height: calc(100vh - auto - 80px);
    }
    
    .search-title {
        font-size: 1.8rem;
        font-weight: 750;
    }
    
    .categories-container {
        gap: var(--spacing-lg);
    }
    
    .subcategory-module {
        margin-bottom: var(--spacing-lg);
    }
    
    .sites-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .subcategory-module {
        margin-bottom: var(--spacing-md);
    }
    
    .subcategory-title {
        font-size: 1.1rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .sites-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-btn {
        border-top: 1px solid var(--border-color);
    }
}

/* 重定向页面样式 */
.redirect-message {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    padding: var(--spacing-lg);
}

.redirect-message h1 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.redirect-message p {
    margin-bottom: var(--spacing-md);
}

.redirect-message a {
    color: var(--primary-color);
    text-decoration: underline;
}