/* ==================== 导航组件 ==================== */
/* 第一层：顶部导航栏 */
.top-bar {
    background-color: #1a1a1a;
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.top-bar a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.top-bar a:hover {
    color: #ffffff;
}

.top-bar .divider {
    color: rgba(255, 255, 255, 0.3);
}

.top-bar-date {
    color: rgba(255, 255, 255, 0.7);
}

/* 第二层：Logo和搜索 */
.header-middle {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.header-middle-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-middle .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.header-middle .logo i {
    font-size: 40px;
}

.header-search .search-box {
    min-width: 320px;
}

/* 第三层：通栏主导航 */
.main-nav-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.3);
}

.main-nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-menu-main {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.nav-menu-main li {
    list-style: none;
    flex: 0 0 auto;
}

.nav-menu-main a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-lg);
    display: block;
    transition: all var(--transition-fast);
    position: relative;
    white-space: nowrap;
}

.nav-menu-main a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.15);
}

.nav-menu-main a.active {
    color: #ffffff;
    background-color: rgba(0, 0, 0, 0.2);
    font-weight: 600;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-full);
    padding: var(--spacing-xs) var(--spacing-sm);
    min-width: 200px;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    padding: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.search-box button {
    color: var(--primary-color);
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.search-box button:hover {
    color: var(--primary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb-separator {
    color: var(--text-tertiary);
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
}

/* ==================== 按钮组件 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.3);
}

.btn-primary {
    color: #ffffff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #ffffff;
}

.btn-outline-primary {
    color: var(--primary-color);
    background-color: transparent;
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    color: #ffffff;
    background-color: var(--primary-color);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ==================== 卡片组件 ==================== */
.card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    height: auto;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.card-category {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background-color: var(--primary-color);
    color: #ffffff;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-tight);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-title a {
    color: var(--text-primary);
}

.card-title a:hover {
    color: var(--primary-color);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 新闻列表项 */
.news-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.news-item:last-child {
    border-bottom: none;
}

.news-item-image {
    flex: 0 0 200px;
    height: 130px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.news-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.news-item:hover .news-item-image img {
    transform: scale(1.05);
}

.news-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.news-item-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-tight);
}

.news-item-title a {
    color: var(--text-primary);
}

.news-item-title a:hover {
    color: var(--primary-color);
}

.news-item-summary {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.news-item-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.news-item-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 纯文本新闻项 */
.news-item-text {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.news-item-text:last-child {
    border-bottom: none;
}

.news-item-text .news-item-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

/* ==================== 焦点图组件 ==================== */
.hero-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    align-items: stretch;
}

/* 左侧轮播区 */
.hero-carousel {
    position: relative;
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* 右侧快讯区 */
.hero-sidebar {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    height: 400px;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.carousel-slide.active {
    opacity: 1;
    visibility: visible;
}

.carousel-slide-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-slide-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-xl);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 50%, transparent 100%);
    color: #ffffff;
}

.carousel-category {
    display: inline-block;
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    color: #ffffff;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(8, 145, 178, 0.25);
}

.carousel-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-tight);
}

.carousel-title a {
    color: #ffffff;
}

.carousel-summary {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-relaxed);
}

.carousel-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.carousel-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 轮播控制 */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background-color: rgba(8, 145, 178, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.carousel-control:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-50%) scale(1.1);
}

.carousel-control.prev {
    left: var(--spacing-md);
}

.carousel-control.next {
    right: var(--spacing-md);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-xs);
}

.carousel-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-indicator.active {
    background-color: #ffffff;
    width: 24px;
    border-radius: 5px;
}



.hero-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid #0891b2;
}

.hero-sidebar-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.hero-sidebar-more {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.hero-sidebar-more:hover {
    color: var(--primary-color);
}

.flash-news-list {
    flex: 1;
    overflow-y: auto;
}

.flash-news-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.flash-news-item:last-child {
    border-bottom: none;
}

.flash-news-icon {
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.flash-news-content {
    flex: 1;
}

.flash-news-title {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-xs);
}

.flash-news-title a:hover {
    color: var(--primary-color);
}

.flash-news-time {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.hero-sidebar-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

/* ==================== 侧边栏组件 ==================== */
.sidebar-section {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    padding-left: var(--spacing-sm);
}

.sidebar-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    background: linear-gradient(180deg, #0891b2 0%, #06b6d4 100%);
    border-radius: 2px;
}

.sidebar-more {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.sidebar-more:hover {
    color: var(--primary-color);
}

.sidebar-body {
    padding: var(--spacing-md);
}

/* 热门排行 */
.hot-list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.hot-list-item:last-child {
    border-bottom: none;
}

.hot-rank {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.hot-rank.top {
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    color: #ffffff;
}

.hot-title {
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hot-title a:hover {
    color: var(--primary-color);
}

.hot-views {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    flex-shrink: 0;
}

/* 推荐文章 */
.recommend-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.recommend-item:last-child {
    border-bottom: none;
}

.recommend-thumb {
    flex: 0 0 80px;
    height: 60px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

.recommend-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.recommend-title {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.recommend-title a:hover {
    color: var(--primary-color);
}

.recommend-meta {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* ==================== 分页组件（纯CSS实现） ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-lg) 0;
    list-style: none;
}

.pagination li {
    display: inline-block;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.pagination a {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    text-decoration: none;
}

.pagination a:hover {
    background-color: var(--primary-color);
    color: #ffffff;
}

.pagination a:focus {
    outline: none;
}

.pagination a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.pagination a:active {
    background-color: var(--primary-dark);
}

.pagination span {
    color: #ffffff;
    background-color: var(--primary-color);
    font-weight: 500;
}

/* ==================== 分享组件 ==================== */
.share-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.share-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #ffffff;
    transition: transform var(--transition-fast);
}

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

.share-weixin { background-color: #07c160; }
.share-weibo { background-color: #e6162d; }
.share-qq { background-color: #12b7f5; }
.share-link { background-color: var(--text-tertiary); }

/* ==================== 评论区组件 ==================== */
.comment-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.comment-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

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

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-time {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.comment-text {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-sm);
}

.comment-actions {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.comment-actions button {
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.comment-actions button:hover {
    color: var(--primary-color);
}

/* ==================== 页脚组件 ==================== */
.footer {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: #ffffff;
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

.footer-friend-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-friend-links span {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

.footer-friend-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.footer-friend-links a:hover {
    color: #ffffff;
}

/* ==================== 区块标题组件 ==================== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-light);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    padding-left: var(--spacing-md);
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, #0891b2 0%, #06b6d4 100%);
    border-radius: 2px;
}

.section-more {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.section-more:hover {
    color: var(--primary-color);
}