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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    background-color: #f5f5f5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 基础布局 */
.sticky-header {
    position: sticky;
    top: 0;
    background-color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 0 15px;
}

/* 顶部导航 */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.nav-tabs {
    display: flex;
    gap: 15px;
}

.nav-tab {
    text-decoration: none;
    color: #666;
    font-size: 14px;
    padding: 5px 0;
    position: relative;
    transition: color 0.3s;
}

.nav-tab:hover {
    color: #ff6b6b;
}

.nav-tab.active {
    color: #ff6b6b;
    font-weight: 600;
}

.nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #ff6b6b;
}

.share-btn-container {
    display: flex;
    align-items: center;
}

.divider-vertical {
    width: 1px;
    height: 20px;
    background-color: #eee;
    margin: 0 10px;
}

.share-btn {
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s;
}

.share-btn:hover {
    background-color: #f0f0f0;
    color: #ff6b6b;
}

/* 搜索框 */
.search-container {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.search-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 12px;
    color: #999;
    font-size: 16px;
}

.search-input {
    width: 100%;
    padding: 10px 40px 10px 35px;
    border: 1px solid #eee;
    border-radius: 20px;
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
}

.search-input:focus {
    border-color: #ff6b6b;
    box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.1);
}

.clear-icon {
    position: absolute;
    right: 12px;
    color: #999;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.3s;
}

.clear-icon:hover {
    color: #666;
}

.search-button {
    padding: 0 20px;
    background-color: #ff6b6b;
    color: white;
    border: none;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.search-button:hover {
    background-color: #ff5252;
    transform: translateY(-1px);
}

/* 排序标签 */
.tags-container {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.left-tags {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
    scrollbar-width: thin;
}

.left-tags::-webkit-scrollbar {
    height: 4px;
}

.left-tags::-webkit-scrollbar-thumb {
    background-color: #ddd;
    border-radius: 2px;
}

.tag {
    text-decoration: none;
    color: #666;
    font-size: 13px;
    padding: 6px 12px;
    background-color: #f5f5f5;
    border-radius: 15px;
    white-space: nowrap;
    transition: all 0.3s;
    position: relative;
    display: flex;
    align-items: center;
    gap: 5px;
}

.tag:hover {
    background-color: #e8e8e8;
}

.tag.active {
    background-color: #ff6b6b;
    color: white;
}

.hot-badge-inline {
    font-size: 10px;
    background-color: rgba(255, 255, 255, 0.3);
    padding: 2px 4px;
    border-radius: 8px;
}

/* 分类标签 */
.column-tags-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.left-column-tags {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
    scrollbar-width: thin;
}

.left-column-tags::-webkit-scrollbar {
    height: 4px;
}

.left-column-tags::-webkit-scrollbar-thumb {
    background-color: #ddd;
    border-radius: 2px;
}

.category-tag {
    text-decoration: none;
    color: #666;
    font-size: 13px;
    padding: 6px 12px;
    background-color: white;
    border: 1px solid #eee;
    border-radius: 15px;
    white-space: nowrap;
    transition: all 0.3s;
}

.category-tag:hover {
    border-color: #ff6b6b;
    color: #ff6b6b;
}

.category-tag.active {
    background-color: #ff6b6b;
    color: white;
    border-color: #ff6b6b;
}

.right-filter {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    color: #666;
    font-size: 14px;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s;
}

.right-filter:hover {
    background-color: #f0f0f0;
    color: #ff6b6b;
}

/* 专栏网格 */
.grid-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* 专栏卡片 */
.column-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.column-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.column-cover-container {
    position: relative;
    width: 100%;
    padding-top: 60%; /* 16:9 宽高比 */
    overflow: hidden;
}

.column-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.column-card:hover .column-cover {
    transform: scale(1.05);
}

.coupon-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: #ff6b6b;
    color: white;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

.free-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: #4ecdc4;
    color: white;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

.column-info {
    padding: 15px;
}

.column-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.column-description {
    font-size: 13px;
    color: #666;
    margin-bottom: 12px;
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.column-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.column-tag {
    font-size: 11px;
    color: #666;
    background-color: #f5f5f5;
    padding: 2px 8px;
    border-radius: 10px;
}

.column-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.column-creator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.creator-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.creator-name {
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

.column-stats {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: #999;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 3px;
}

.stat-item i {
    font-size: 11px;
}

.column-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.column-price {
    display: flex;
    align-items: baseline;
    gap: 5px;
}

.price-value {
    font-size: 18px;
    font-weight: 600;
    color: #ff6b6b;
}

.price-type {
    font-size: 12px;
    color: #999;
}

.subscribe-btn {
    background-color: #ff6b6b;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 6px 12px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s;
}

.subscribe-btn:hover {
    background-color: #ff5252;
    transform: translateY(-1px);
}

/* 分页控件 */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background-color: white;
    margin-top: 20px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

.pagination-btn {
    background-color: white;
    border: 1px solid #eee;
    color: #666;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s;
}

.pagination-btn:hover:not(:disabled) {
    border-color: #ff6b6b;
    color: #ff6b6b;
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    display: flex;
    gap: 15px;
    font-size: 14px;
    color: #666;
}

/* 加载指示器 */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    gap: 10px;
    color: #666;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f0f0f0;
    border-top: 4px solid #ff6b6b;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-tabs {
        gap: 10px;
    }
    
    .nav-tab {
        font-size: 13px;
    }
    
    .search-container {
        flex-direction: column;
        gap: 8px;
    }
    
    .search-button {
        width: 100%;
    }
    
    .grid-container {
        grid-template-columns: 1fr;
        padding: 15px;
        gap: 15px;
    }
    
    .column-cover-container {
        padding-top: 56.25%; /* 16:9 宽高比 */
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}