/* category.css - 栏目分类页完整样式（独立完整，不依赖任何外部文件） */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-50: #f0f5ff;
    --secondary: #3b82f6;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --white: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --border: #e2e8f0;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.7; }
a { text-decoration: none; color: inherit; transition: all 0.2s ease; }

/* 顶部栏 */
.top-bar { background: var(--primary-light); padding: 6px 12px; font-size: 12px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--border); }
.top-bar a { margin: 0 6px; color: var(--text-light); }
.top-bar a:hover { color: var(--primary); }

/* 头部 */
.header-main { background: var(--white); padding: 10px 12px; border-bottom: 2px solid var(--primary); }
.logo-area { display: flex; align-items: center; gap: 8px; }
.logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; }
.logo-text h1 { font-size: 18px; font-weight: 700; color: var(--primary); }
.logo-text p { font-size: 10px; color: var(--text-lighter); }

/* 搜索框 */
.search-box { background: var(--white); border-radius: 30px; margin: 10px 12px; display: flex; align-items: center; padding: 5px 12px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.search-box i { color: var(--text-lighter); margin-right: 6px; font-size: 14px; }
.search-box input { flex: 1; border: none; background: transparent; font-size: 14px; outline: none; }
.search-box button { background: var(--primary); color: #fff; border: none; padding: 6px 16px; border-radius: 25px; font-size: 13px; cursor: pointer; transition: background 0.2s; }
.search-box button:hover { background: var(--primary-dark); }

/* 导航菜单 */
.main-nav { background: var(--white); overflow-x: auto; white-space: nowrap; padding: 6px 12px; border-bottom: 1px solid var(--border); }
.main-nav::-webkit-scrollbar { display: none; }
.main-nav a { color: var(--text); padding: 6px 14px; font-size: 14px; display: inline-block; border-radius: 20px; margin: 0 2px; }
.main-nav a i { margin-right: 5px; font-size: 13px; }
.main-nav a:hover { background: var(--primary-light); color: var(--primary); }
.main-nav a.active { background: var(--primary); color: #fff; }

/* 面包屑 */
.breadcrumb { background: var(--white); padding: 8px 12px; margin: 10px 12px; border-radius: var(--radius); font-size: 13px; box-shadow: var(--shadow); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .separator { margin: 0 5px; color: var(--border); }

/* 栏目头部 */
.category-header { background: var(--white); margin: 0 12px 16px; padding: 16px; border-radius: var(--radius); border-left: 4px solid var(--primary); box-shadow: var(--shadow); }
.category-header h1 { font-size: 18px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.category-header p { font-size: 13px; color: var(--text-light); margin-bottom: 12px; }
.sub-cat-section { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-top: 10px; border-top: 1px dashed var(--border); }
.sub-cat-label { font-size: 12px; color: var(--text-light); }
.sub-cat-link { padding: 4px 12px; background: var(--primary-light); border-radius: 20px; font-size: 12px; color: var(--primary); }
.sub-cat-link:hover { background: var(--primary); color: #fff; }

/* 文章列表 */
.article-list { background: var(--white); margin: 0 12px 16px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.article-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.article-item:hover { background: var(--primary-50); }
.article-index { width: 26px; height: 26px; border-radius: 4px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: #fff; background: var(--text-lighter); flex-shrink: 0; }
.article-index.top1 { background: var(--accent); color: #fff; }
.article-index.top2 { background: #94a3b8; color: #fff; }
.article-index.top3 { background: #b45309; }
.article-info { flex: 1; min-width: 0; }
.article-title { font-size: 14px; font-weight: 500; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-title:hover { color: var(--primary); }
.article-meta { font-size: 12px; color: var(--text-lighter); margin-top: 4px; display: flex; gap: 12px; }

/* 加载更多 */
.load-more-wrapper { text-align: center; padding: 12px; margin: 0 12px 16px; }
.load-more-btn { background: var(--primary); color: #fff; border: none; padding: 10px 16px; border-radius: 30px; font-size: 14px; cursor: pointer; width: 100%; box-shadow: var(--shadow); transition: all 0.2s; }
.load-more-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.load-more-btn.loading { opacity: 0.7; cursor: not-allowed; }

/* 底部推荐区域 */
.bottom-section { background: var(--white); margin: 0 12px 16px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.bottom-section-header { background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%); padding: 12px 16px; }
.bottom-section-header h3 { font-size: 16px; color: #fff; display: flex; align-items: center; gap: 6px; }
.bottom-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); }
.bottom-card { background: var(--white); padding: 16px; }
.bottom-card h4 { font-size: 14px; color: var(--primary); margin-bottom: 10px; padding-bottom: 5px; border-bottom: 1px solid var(--border); }
.bottom-links { display: flex; flex-direction: column; gap: 6px; }
.bottom-link-item { display: block; font-size: 13px; color: var(--text-light); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: all 0.2s; }
.bottom-link-item:hover { color: var(--primary); padding-left: 4px; }
.bottom-link-item i { width: 16px; color: var(--accent); margin-right: 6px; }
.bottom-tag { display: inline-block; padding: 4px 12px; background: var(--primary-light); border-radius: 20px; font-size: 12px; color: var(--primary); margin: 0 4px 8px 0; transition: all 0.2s; }
.bottom-tag:hover { background: var(--primary); color: #fff; }
.bottom-tag i { margin-right: 4px; font-size: 11px; }

/* 底部 */
.site-footer { background: #1a1a2e; color: #aaa; margin-top: 30px; padding: 25px 12px 15px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; justify-content: center; }
.footer-links a { font-size: 12px; color: #aaa; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { text-align: center; font-size: 11px; padding-top: 12px; border-top: 1px solid #333; }

/* 返回顶部按钮 */
.back-to-top { position: fixed; bottom: 20px; right: 20px; width: 40px; height: 40px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; cursor: pointer; opacity: 0; visibility: hidden; transition: all 0.3s; z-index: 999; box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* 移动端菜单 */
.mobile-sidebar { position: fixed; top: 0; left: -260px; width: 260px; height: 100%; background: var(--white); z-index: 1003; transition: left 0.3s ease; overflow-y: auto; box-shadow: 2px 0 10px rgba(0,0,0,0.1); }
.mobile-sidebar.open { left: 0; }
.mobile-sidebar-header { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: 20px 15px; color: #fff; position: relative; }
.mobile-menu-close { position: absolute; top: 15px; right: 15px; width: 28px; height: 28px; background: rgba(255,255,255,0.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.mobile-menu-close:hover { background: rgba(255,255,255,0.3); }
.mobile-menu-list { list-style: none; padding: 0; margin: 0; }
.mobile-menu-item { border-bottom: 1px solid var(--border); }
.mobile-menu-link { display: flex; align-items: center; gap: 10px; padding: 12px 15px; color: var(--text); font-size: 14px; }
.mobile-menu-link:hover { background: var(--primary-light); color: var(--primary); }
.mobile-menu-link i:first-child { width: 24px; color: var(--primary); font-size: 16px; }
.overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1002; opacity: 0; visibility: hidden; transition: all 0.3s; }
.overlay.active { opacity: 1; visibility: visible; }
.menu-toggle { width: 36px; height: 36px; background: var(--primary-light); border-radius: var(--radius); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; cursor: pointer; }
.menu-toggle span { width: 18px; height: 2px; background: var(--primary); border-radius: 2px; transition: all 0.3s; }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
.mobile-search-icon { width: 36px; height: 36px; background: var(--primary-light); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; cursor: pointer; margin-left: auto; margin-right: 8px; }
.mobile-search-icon i { color: var(--primary); font-size: 18px; }
.mobile-search-icon:hover { background: var(--primary); }
.mobile-search-icon:hover i { color: #fff; }
.mobile-search-box { position: fixed; top: 0; left: 0; right: 0; background: var(--white); z-index: 1004; padding: 12px 15px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); border-bottom: 2px solid var(--primary); animation: slideDown 0.3s ease; display: none; }
.mobile-search-form { display: flex; align-items: center; gap: 10px; background: var(--primary-light); border-radius: 30px; padding: 4px 15px; }
.mobile-search-form input { flex: 1; border: none; background: transparent; padding: 8px 0; font-size: 14px; outline: none; }
.mobile-search-form button { background: var(--primary); color: #fff; border: none; padding: 6px 16px; border-radius: 25px; cursor: pointer; font-size: 13px; }
.mobile-search-close { color: var(--text-lighter); font-size: 20px; cursor: pointer; padding: 5px; }
.mobile-header { display: none; background: var(--white); padding: 10px 12px; border-bottom: 1px solid var(--border); align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 1002; }
.mobile-logo { display: flex; align-items: center; gap: 8px; }
.mobile-logo-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; }
.mobile-logo-text h2 { font-size: 16px; font-weight: 700; color: var(--primary); }
.mobile-logo-text p { font-size: 10px; color: var(--text-lighter); }

/* 响应式 */
@media (max-width: 768px) {
    .top-bar, .header-main, .main-nav { display: none; }
    .mobile-header { display: flex; }
    .bottom-grid { grid-template-columns: 1fr; gap: 12px; }
    .bottom-card { padding: 12px; }
    .article-meta { display: none; }
}

@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}