/* ============================================
   NewsCMS - 前台样式
   简洁大方 · 多端自适应
   ============================================ */

/* CSS变量 */
:root {
    --color-primary: #1a56fe;
    --color-primary-dark: #0d3fdd;
    --color-primary-light: #e8f0ff;
    --color-text: #1a1a2e;
    --color-text-secondary: #555;
    --color-text-muted: #999;
    --color-bg: #f5f7fa;
    --color-bg-card: #fff;
    --color-border: #e8e8e8;
    --color-red: #e74c3c;
    --color-green: #27ae60;
    --color-orange: #f39c12;
    --color-blue: #3498db;
    --header-height: 64px;
    --max-width: 1200px;
    --radius: 8px;
    --radius-sm: 4px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
    --transition: all 0.2s ease;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 14px;
}

a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* 头部 */
.site-header {
    background: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    height: var(--header-height);
    gap: 24px;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

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

.main-nav {
    display: flex;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
}

.nav-link {
    padding: 8px 16px;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    font-size: 15px;
}

.nav-link:hover { background: var(--color-primary-light); color: var(--color-primary); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.search-form {
    display: flex;
    align-items: center;
    background: var(--color-bg);
    border-radius: 24px;
    padding: 4px 4px 4px 16px;
    transition: var(--transition);
}

.search-form:focus-within {
    background: #fff;
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

.search-input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    width: 140px;
    color: var(--color-text);
}

.search-btn {
    border: none;
    background: var(--color-primary);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* 内容布局 */
.content-wrap {
    display: flex;
    gap: 24px;
    padding: 24px 0;
}

.main-content { flex: 1; min-width: 0; }
.sidebar { width: 300px; flex-shrink: 0; }

/* 面包屑导航 */
.breadcrumb {
    padding: 16px 0;
    font-size: 13px;
    color: var(--color-text-muted);
}

.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb .sep { margin: 0 8px; }
.breadcrumb .current { color: var(--color-text); }

/* 头条文章 */
.hero-article {
    margin-bottom: 24px;
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow);
    aspect-ratio: 16/7;
}

.hero-link { display: block; width: 100%; height: 100%; }

.hero-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s ease;
}

.hero-article:hover .hero-image { transform: scale(1.03); }

.hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px 24px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    color: #fff;
}

.hero-badge {
    display: inline-block;
    background: var(--color-red);
    color: #fff;
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.hero-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}

.hero-summary { font-size: 14px; opacity: 0.9; margin-bottom: 8px; }
.hero-meta { display: flex; gap: 16px; font-size: 13px; opacity: 0.8; }

/* 文章列表 */
.article-list { display: flex; flex-direction: column; gap: 16px; }

.article-card {
    display: flex;
    background: var(--color-bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.article-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

.card-image {
    width: 200px;
    flex-shrink: 0;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.card-body {
    flex: 1;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
}

.card-tag {
    display: inline-block;
    font-size: 12px;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
    width: fit-content;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 8px;
}

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

.card-summary {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--color-text-muted);
}

/* 文章详情 */
.article-detail {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

.article-title {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
    color: var(--color-text);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.meta-label { color: var(--color-text-muted); }

.meta-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.meta-badge.original {
    background: var(--color-orange);
    color: #fff;
}

.article-image {
    margin-bottom: 24px;
    border-radius: var(--radius);
    overflow: hidden;
}

.article-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
}

.article-body p { margin-bottom: 16px; }
.article-body img { border-radius: var(--radius-sm); margin: 16px 0; }
.article-body h2, .article-body h3 { margin: 24px 0 12px; }
.article-body a { color: var(--color-primary); text-decoration: underline; }

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    margin-top: 24px;
    border-top: 1px solid var(--color-border);
}

.article-tags { display: flex; gap: 8px; }
.article-tag {
    padding: 4px 12px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 16px;
    font-size: 13px;
}

.share-btn {
    border: 1px solid var(--color-border);
    background: #fff;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
}

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

/* 相关文章 */
.related-articles { margin-top: 24px; }
.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-left: 12px;
    border-left: 3px solid var(--color-primary);
}

.related-list { display: flex; flex-direction: column; gap: 12px; }

.related-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.related-item:hover { background: var(--color-primary-light); }
.related-title { flex: 1; color: var(--color-text); }
.related-title:hover { color: var(--color-primary); }
.related-time { font-size: 13px; color: var(--color-text-muted); margin-left: 16px; }

/* 侧边栏 */
.sidebar-block {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.sidebar-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.latest-list { list-style: none; }
.latest-list li {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}
.latest-list li:last-child { border-bottom: none; }
.latest-list a {
    display: block;
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 4px;
}
.latest-list a:hover { color: var(--color-primary); }
.latest-time { font-size: 12px; color: var(--color-text-muted); }

.hot-list { list-style: none; }
.hot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}
.hot-item:last-child { border-bottom: none; }

.hot-rank {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: #ccc;
    flex-shrink: 0;
}

.rank-1 { background: var(--color-red); }
.rank-2 { background: var(--color-orange); }
.rank-3 { background: var(--color-orange); }
.rank-normal { background: #bbb; }

.hot-item a {
    color: var(--color-text);
    font-size: 14px;
    flex: 1;
    line-height: 1.4;
}
.hot-item a:hover { color: var(--color-primary); }

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    padding: 24px 0;
}

.page-link {
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    background: #fff;
    font-size: 14px;
    transition: var(--transition);
}

.page-link:hover { border-color: var(--color-primary); color: var(--color-primary); }
.page-link.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-icon { font-size: 48px; margin-bottom: 16px; }
.empty-hint { font-size: 13px; margin-top: 8px; }

/* 页面标题 */
.page-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-desc { color: var(--color-text-muted); margin-bottom: 16px; }

.search-info { margin-bottom: 16px; color: var(--color-text-secondary); }

/* 页脚 */
.site-footer {
    background: #1a1a2e;
    color: rgba(255,255,255,0.7);
    padding: 32px 0;
    text-align: center;
    font-size: 13px;
    margin-top: 40px;
}

.site-footer a { color: rgba(255,255,255,0.7); }
.site-footer a:hover { color: #fff; }
.site-footer p { margin-bottom: 8px; }
.footer-powered { opacity: 0.5; font-size: 12px; }

/* 响应式 */
@media (max-width: 960px) {
    .sidebar { display: none; }
    .content-wrap { padding: 16px 0; }
}

@media (max-width: 768px) {
    .header-inner { gap: 12px; }
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 8px;
        box-shadow: var(--shadow-hover);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        z-index: 99;
    }
    .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-link { padding: 12px 16px; }
    
    .nav-toggle { display: flex; }
    
    .search-form { display: none; }
    .header-right .search-form { display: flex; width: auto; }
    .search-input { width: 100px; }
    
    .article-card { flex-direction: column; }
    .card-image { width: 100%; height: 180px; }
    .card-body { padding: 14px; }
    .card-title { font-size: 16px; }
    
    .article-detail { padding: 20px; }
    .article-title { font-size: 20px; }
    .article-body { font-size: 15px; }
    
    .hero-title { font-size: 18px; }
    .hero-article { aspect-ratio: 16/9; }
    
    .related-item { flex-direction: column; align-items: flex-start; }
    .related-time { margin-left: 0; margin-top: 4px; }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }
    .logo { font-size: 18px; }
    .pagination { flex-wrap: wrap; }
    .page-link { padding: 6px 10px; font-size: 13px; }
    .article-meta { gap: 12px; font-size: 13px; }
}