/* ============================================================
   数字商品百科 - 主样式表（结构+组件）
   颜色变量由 themes/{name}/theme.css 提供
   ============================================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-h); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ---------- 容器 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg, rgba(247,247,245,.92));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 60px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-icon { font-size: 1.4rem; }
.logo-img { height: 28px; width: auto; display: block; }
.logo-text { color: var(--text); }
.logo:hover { color: var(--accent); }
.logo:hover .logo-img { opacity: 0.85; }

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  justify-content: flex-end;
}
.main-nav::-webkit-scrollbar { display: none; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: .82rem;
  color: var(--text-2);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.nav-item:hover { background: var(--bg-muted); color: var(--text); }
.nav-item.active { background: var(--accent-lt); color: var(--accent); font-weight: 600; }
.nav-icon { font-size: 1rem; }

/* 搜索 */
.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; margin-left: auto; }
.search-form { display: flex; align-items: center; background: var(--bg-muted); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; transition: border-color var(--transition); }
.search-form:focus-within { border-color: var(--accent); }
.search-input { border: none; background: transparent; padding: 6px 14px; font-size: .85rem; width: 200px; outline: none; color: var(--text); }
.search-input::placeholder { color: var(--text-3); }
.search-btn { background: none; border: none; cursor: pointer; padding: 6px 12px; font-size: 1rem; }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; font-size: 1.3rem; padding: 6px; }

/* 移动端导航 */
.mobile-nav { display: none; position: fixed; top: 60px; left: 0; right: 0; background: var(--bg-card); border-bottom: 1px solid var(--border); z-index: 99; padding: 12px; }
.mobile-nav.open { display: block; }
.mobile-nav-inner { display: flex; flex-wrap: wrap; gap: 8px; }
.mobile-nav-item { padding: 8px 14px; background: var(--bg-muted); border-radius: var(--radius-sm); font-size: .85rem; color: var(--text-2); }
.mobile-nav-item:hover { background: var(--accent-lt); color: var(--accent); }
.mobile-nav-search { padding: 12px; background: var(--bg-card); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: linear-gradient(135deg, var(--hero-from, #1e1b4b) 0%, var(--hero-to, #4338ca) 100%);
  padding: 72px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 1; }
.hero-title { font-size: 2.6rem; font-weight: 800; color: #fff; margin-bottom: 16px; line-height: 1.2; }
.hero-emoji { margin-right: 12px; }
.hero-logo-img { height: 42px; width: auto; margin-right: 12px; vertical-align: middle; filter: brightness(0) invert(1); }
.hero-desc { font-size: 1.1rem; color: rgba(255,255,255,.75); margin-bottom: 32px; }

.hero-search { display: flex; max-width: 560px; margin: 0 auto 24px; background: #fff; border-radius: 50px; padding: 6px 6px 6px 20px; box-shadow: 0 8px 32px rgba(0,0,0,.25); }
.hero-search-input { flex: 1; border: none; background: transparent; font-size: 1rem; outline: none; color: var(--text); }
.hero-search-input::placeholder { color: var(--text-3); }
.hero-search-btn { background: var(--accent); color: #fff; border: none; border-radius: 40px; padding: 10px 28px; font-size: .95rem; font-weight: 600; cursor: pointer; transition: background var(--transition); white-space: nowrap; }
.hero-search-btn:hover { background: var(--accent-h); }

.hero-quick-tags { display: flex; align-items: center; flex-wrap: wrap; justify-content: center; gap: 8px; }
.hero-tag-label { color: rgba(255,255,255,.6); font-size: .85rem; }
.hero-tag { background: rgba(255,255,255,.15); color: rgba(255,255,255,.9); border: 1px solid rgba(255,255,255,.2); padding: 4px 12px; border-radius: 20px; font-size: .82rem; transition: background var(--transition); }
.hero-tag:hover { background: rgba(255,255,255,.25); color: #fff; }

/* ============================================================
   SECTION
   ============================================================ */
.section { padding: 60px 0; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
.section-title { font-size: 1.4rem; font-weight: 700; color: var(--text); }
.section-subtitle { font-size: .9rem; color: var(--text-3); margin-top: 4px; }
.section-more { font-size: .85rem; color: var(--accent); font-weight: 500; }
.section-more:hover { text-decoration: underline; }

/* ============================================================
   分类卡片
   ============================================================ */
.categories-section { background: var(--bg); padding-bottom: 48px; }
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.cat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  color: var(--text);
}
.cat-card:hover { box-shadow: var(--shadow); border-color: var(--accent); transform: translateY(-2px); }
.cat-icon { font-size: 2.2rem; flex-shrink: 0; width: 52px; height: 52px; background: var(--bg-muted); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; }
.cat-info { flex: 1; min-width: 0; }
.cat-name { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.cat-desc { font-size: .8rem; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat-count { font-size: .8rem; color: var(--text-3); white-space: nowrap; }

/* ============================================================
   精选文章
   ============================================================ */
.featured-section { background: var(--bg-muted); }
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 12px;
}

/* 大卡片：横向布局，左图右文 */
.featured-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  color: var(--text);
}
.featured-card:hover { box-shadow: var(--shadow); border-color: var(--border-h); transform: translateY(-2px); }

/* 占2列大卡：改为左图右文横向排列 */
.featured-large {
  grid-column: span 2;
  grid-row: span 2;
  flex-direction: row;
  align-items: stretch;
}
.featured-large .featured-img {
  width: 44%;
  height: auto;
  min-height: 160px;
  flex-shrink: 0;
}
.featured-large .featured-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}
.featured-large .featured-title { font-size: 1.05rem; }
.featured-large .featured-excerpt { -webkit-line-clamp: 4; }

/* 普通图片区域：缩小高度 */
.featured-img {
  width: 100%;
  height: 120px;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}
.featured-img-placeholder {
  background: linear-gradient(135deg, var(--accent-lt), var(--bg-muted));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.featured-body { padding: 12px; flex: 1; }
.featured-meta { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.tag-badge { background: var(--accent-lt); color: var(--accent); padding: 2px 7px; border-radius: 4px; font-size: .72rem; font-weight: 500; }
.view-count { font-size: .72rem; color: var(--text-3); margin-left: auto; }
.featured-title { font-size: .92rem; font-weight: 600; margin-bottom: 4px; line-height: 1.45; }
.featured-excerpt {
  font-size: .8rem;
  color: var(--text-2);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

/* ============================================================
   瀑布流 (Masonry)
   ============================================================ */
.articles-section { background: var(--bg); }
.filter-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-tab { background: var(--bg-muted); border: 1px solid var(--border); color: var(--text-2); padding: 5px 14px; border-radius: 20px; font-size: .8rem; cursor: pointer; transition: all var(--transition); }
.filter-tab:hover, .filter-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.masonry-grid {
  columns: 4;
  column-gap: 16px;
}
.article-card {
  break-inside: avoid;
  page-break-inside: avoid;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.article-card:hover { box-shadow: var(--shadow); border-color: var(--border-h); transform: translateY(-2px); }

.card-img-link { display: block; overflow: hidden; }
.card-img { width: 100%; height: 160px; object-fit: cover; transition: transform .3s ease; }
.card-img-link:hover .card-img { transform: scale(1.04); }

.card-body { padding: 16px; }
.card-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.card-cat { font-size: .75rem; color: var(--accent); font-weight: 500; background: var(--accent-lt); padding: 2px 8px; border-radius: 4px; }
.card-time { font-size: .75rem; color: var(--text-3); margin-left: auto; }
.card-title { font-size: .95rem; font-weight: 600; line-height: 1.45; margin-bottom: 8px; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--accent); }
.card-excerpt { font-size: .82rem; color: var(--text-2); line-height: 1.6; margin-bottom: 10px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 10px; }
.card-tag { font-size: .72rem; color: var(--text-3); background: var(--bg-muted); padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border); transition: all var(--transition); }
.card-tag:hover { background: var(--accent-lt); color: var(--accent); border-color: var(--accent); }
.card-tag-active { background: var(--accent-lt); color: var(--accent); border-color: var(--accent); }
.card-footer { display: flex; flex-wrap: wrap; gap: 8px; font-size: .75rem; color: var(--text-3); padding-top: 8px; border-top: 1px solid var(--border); margin: 0 16px 12px; }

/* 加载更多 */
.load-more-wrap { text-align: center; padding: 32px 0; }
.load-more-btn { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-2); padding: 12px 36px; border-radius: var(--radius); font-size: .9rem; cursor: pointer; transition: all var(--transition); }
.load-more-btn:hover { border-color: var(--accent); color: var(--accent); }
.load-more-btn:disabled { opacity: .5; cursor: not-allowed; }

/* 空状态 */
.empty-state { text-align: center; padding: 80px 24px; }
.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state h3 { font-size: 1.2rem; color: var(--text-2); margin-bottom: 8px; }
.empty-state p { color: var(--text-3); }

/* ============================================================
   标签云
   ============================================================ */
.tags-section { background: var(--bg-muted); margin-bottom: -1px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud-item { color: var(--text-2); background: var(--bg-card); border: 1px solid var(--border); padding: 5px 14px; border-radius: 20px; transition: all var(--transition); }
.tag-cloud-item:hover { background: var(--accent-lt); color: var(--accent); border-color: var(--accent); }
.tag-cloud-item sup { font-size: .65rem; color: var(--text-3); margin-left: 3px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--footer-bg, #1a1a2e); color: var(--footer-text, rgba(255,255,255,.7)); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-logo-img { height: 24px; width: auto; filter: brightness(0) invert(1); }
.footer-desc { font-size: .85rem; line-height: 1.7; margin-bottom: 16px; }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-tag { background: rgba(255,255,255,.08); padding: 4px 12px; border-radius: 20px; font-size: .78rem; border: 1px solid rgba(255,255,255,.12); }
.footer-col h4 { color: #fff; font-size: .9rem; margin-bottom: 14px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: .85rem; color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 20px; text-align: center; font-size: .8rem; }
.footer-bottom a { color: rgba(255,255,255,.5); }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb-wrap { background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 12px 0; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; font-size: .83rem; color: var(--text-3); }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--accent); }
.bc-sep { margin: 0 4px; }
.bc-current { color: var(--text); font-weight: 500; }

/* ============================================================
   文章详情
   ============================================================ */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 60px;
  align-items: start;
}
.article-main { min-width: 0; }

.article-header { margin-bottom: 32px; }
.article-cats { margin-bottom: 12px; }
.article-cat-badge { background: var(--accent-lt); color: var(--accent); padding: 4px 14px; border-radius: 20px; font-size: .82rem; font-weight: 600; }
.article-title { font-size: 2rem; font-weight: 800; line-height: 1.3; margin-bottom: 16px; color: var(--text); }
.article-meta-bar { display: flex; flex-wrap: wrap; gap: 16px; font-size: .83rem; color: var(--text-3); margin-bottom: 14px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.article-tag { background: var(--bg-muted); color: var(--text-2); border: 1px solid var(--border); padding: 3px 10px; border-radius: 4px; font-size: .78rem; }
.article-tag:hover { background: var(--accent-lt); color: var(--accent); border-color: var(--accent); }

/* 目录 */
.toc-box { background: var(--bg-muted); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 32px; }
.toc-title { font-weight: 700; margin-bottom: 12px; font-size: .95rem; }
.toc-list { padding-left: 20px; display: flex; flex-direction: column; gap: 6px; list-style: decimal; }
.toc-list a { font-size: .85rem; color: var(--text-2); }
.toc-list a:hover { color: var(--accent); }

/* 文章章节 */
.article-section { margin-bottom: 48px; }
.section-heading { font-size: 1.3rem; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 12px; padding-bottom: 12px; border-bottom: 2px solid var(--border); }
.section-num { background: var(--accent); color: #fff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: .85rem; font-weight: 700; flex-shrink: 0; }
.section-badge { font-size: .72rem; font-weight: 500; padding: 3px 10px; border-radius: 20px; margin-left: 4px; }
.badge-green { background: var(--green-lt); color: var(--green); }
.badge-blue { background: var(--blue-lt); color: var(--blue); }

/* 简介卡片 */
.intro-card { background: var(--bg-muted); border-left: 4px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 20px 24px; font-size: .95rem; line-height: 1.8; color: var(--text-2); }

/* 渠道卡片 */
.channel-list { display: flex; flex-direction: column; gap: 12px; }
.channel-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; display: flex; align-items: center; gap: 16px; position: relative; transition: box-shadow var(--transition); }
.channel-card:hover { box-shadow: var(--shadow); }
.channel-recommended { border-color: var(--green); background: linear-gradient(135deg, #fff 0%, var(--green-lt) 100%); }
.channel-rec-badge { position: absolute; top: -10px; right: 16px; background: var(--green); color: #fff; font-size: .72rem; padding: 2px 10px; border-radius: 10px; font-weight: 600; }
.channel-icon { font-size: 1.8rem; flex-shrink: 0; }
.channel-info { flex: 1; }
.channel-info h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.channel-info p { font-size: .82rem; color: var(--text-2); }
.channel-link { background: var(--accent); color: #fff; padding: 8px 18px; border-radius: var(--radius-sm); font-size: .82rem; font-weight: 600; white-space: nowrap; transition: background var(--transition); }
.channel-link:hover { background: var(--accent-h); color: #fff; }

/* 第三方平台 */
.platform-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.platform-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; transition: box-shadow var(--transition), transform var(--transition); }
.platform-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.platform-icon { font-size: 2rem; margin-bottom: 10px; }
.platform-card h4 { font-size: .9rem; font-weight: 600; margin-bottom: 6px; }
.platform-card p { font-size: .78rem; color: var(--text-3); margin-bottom: 12px; }
.platform-link { background: var(--blue-lt); color: var(--blue); padding: 6px 16px; border-radius: var(--radius-sm); font-size: .8rem; font-weight: 600; display: inline-block; }
.platform-link:hover { background: var(--blue); color: #fff; }

/* 步骤列表 */
.steps-list { display: flex; flex-direction: column; gap: 12px; }
.step-item { display: flex; align-items: flex-start; gap: 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; }
.step-num { background: var(--accent); color: #fff; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .85rem; flex-shrink: 0; }
.step-text { font-size: .93rem; padding-top: 4px; color: var(--text-2); }

/* 避坑指南 */
.tips-box { background: #FFF7ED; border: 1px solid #FED7AA; border-radius: var(--radius); padding: 20px 24px; display: flex; flex-direction: column; gap: 10px; }
.tip-item { font-size: .9rem; color: #92400E; line-height: 1.6; }

/* 推荐排序 */
.ranking-list { display: flex; flex-direction: column; gap: 12px; }
.ranking-item { display: flex; align-items: center; gap: 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; position: relative; }
.rank-1 { border-color: #F59E0B; background: linear-gradient(135deg, #fff 0%, #FFFBEB 100%); }
.rank-2 { border-color: #9CA3AF; }
.rank-3 { border-color: #D97706; }
.rank-badge { width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: .9rem; flex-shrink: 0; }
.rank-1 .rank-badge { background: #F59E0B; color: #fff; }
.rank-2 .rank-badge { background: #9CA3AF; color: #fff; }
.rank-3 .rank-badge { background: #D97706; color: #fff; }
.ranking-item .rank-badge { background: var(--bg-muted); color: var(--text-3); }
.rank-info { flex: 1; }
.rank-info h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.rank-info p { font-size: .82rem; color: var(--text-2); }
.rank-crown { font-size: 1.5rem; }

/* 文章底部栏 */
.article-footer-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding: 20px; background: var(--bg-muted); border-radius: var(--radius); margin-top: 32px; }
.like-btn { display: flex; align-items: center; gap: 8px; background: var(--bg-card); border: 1px solid var(--border); padding: 10px 20px; border-radius: var(--radius-sm); font-size: .9rem; cursor: pointer; transition: all var(--transition); }
.like-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.like-btn.liked { background: var(--accent-lt); border-color: var(--accent); color: var(--accent); }
.like-icon { font-size: 1.1rem; }
.share-section { display: flex; align-items: center; gap: 8px; }
.share-btn { background: var(--bg-card); border: 1px solid var(--border); padding: 8px 16px; border-radius: var(--radius-sm); font-size: .83rem; cursor: pointer; color: var(--text-2); transition: all var(--transition); }
.share-btn:hover { border-color: var(--accent); color: var(--accent); }
.source-notice { margin-top: 16px; padding: 12px 16px; background: var(--bg-muted); border-radius: var(--radius-sm); font-size: .82rem; color: var(--text-3); }

/* 纯文本内容 */
.prose { font-size: .95rem; line-height: 1.8; color: var(--text-2); }

/* ============================================================
   侧边栏
   ============================================================ */
.article-sidebar { position: sticky; top: 80px; display: flex; flex-direction: column; gap: 16px; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.sidebar-title { font-size: .9rem; font-weight: 700; margin-bottom: 14px; color: var(--text); }
.toc-nav { display: flex; flex-direction: column; gap: 6px; padding-left: 16px; list-style: decimal; }
.toc-link { font-size: .82rem; color: var(--text-2); transition: color var(--transition); }
.toc-link:hover, .toc-link.active { color: var(--accent); }
.related-list { display: flex; flex-direction: column; gap: 10px; }
.related-list li { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.related-list a { font-size: .83rem; color: var(--text-2); line-height: 1.4; }
.related-list a:hover { color: var(--accent); }
.related-views { font-size: .72rem; color: var(--text-3); white-space: nowrap; }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.sidebar-tag { background: var(--bg-muted); border: 1px solid var(--border); color: var(--text-2); padding: 3px 10px; border-radius: 4px; font-size: .78rem; }
.sidebar-tag:hover { background: var(--accent-lt); color: var(--accent); border-color: var(--accent); }

/* ============================================================
   分类 Hero / 标签 Hero
   ============================================================ */
.category-hero, .tag-hero {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 40px 0 24px;
}
.cat-hero-icon { font-size: 3.5rem; flex-shrink: 0; }
.cat-hero-info h1 { font-size: 1.8rem; font-weight: 800; margin-bottom: 8px; }
.cat-hero-info p { color: var(--text-2); margin-bottom: 10px; }
.cat-hero-stats { font-size: .85rem; color: var(--text-3); }
.tag-hero-icon { width: 64px; height: 64px; background: var(--accent-lt); color: var(--accent); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: 800; flex-shrink: 0; }
.tag-hero-info h1 { font-size: 1.8rem; font-weight: 800; margin-bottom: 6px; }
.tag-hero-info p { color: var(--text-3); }

/* ============================================================
   搜索页
   ============================================================ */
.search-hero { padding: 40px 0 24px; }
.search-hero h1 { font-size: 1.6rem; font-weight: 700; margin-bottom: 16px; }
.search-hero em { color: var(--accent); font-style: normal; }
.search-form-page { display: flex; gap: 10px; max-width: 560px; }
.search-input-page { flex: 1; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 16px; font-size: .95rem; outline: none; transition: border-color var(--transition); background: var(--bg-card); }
.search-input-page:focus { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: #fff; border: none; border-radius: var(--radius-sm); padding: 10px 24px; font-size: .9rem; font-weight: 600; cursor: pointer; transition: background var(--transition); white-space: nowrap; }
.btn-primary:hover { background: var(--accent-h); }
.search-count { font-size: .9rem; color: var(--text-3); margin-bottom: 20px; }
.search-count strong { color: var(--text); }

/* ============================================================
   分页
   ============================================================ */
.pagination { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; padding: 32px 0; }
.page-btn { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-2); padding: 8px 16px; border-radius: var(--radius-sm); font-size: .85rem; transition: all var(--transition); }
.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============================================================
   通用按钮
   ============================================================ */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: var(--radius-sm); font-size: .85rem; font-weight: 500; cursor: pointer; transition: all var(--transition); border: 1px solid transparent; }
.btn-sm { padding: 5px 12px; font-size: .78rem; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text-2); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: #FEF2F2; color: var(--red); border-color: #FCA5A5; }
.btn-danger:hover { background: var(--red); color: #fff; }

/* ============================================================
   响应式
   ============================================================ */

/* ---------- 平板 (≤1024px) ---------- */
@media (max-width: 1024px) {
  .masonry-grid { columns: 3; }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .featured-large { grid-column: span 2; flex-direction: column; }
  .featured-large .featured-img { width: 100%; height: 140px; min-height: unset; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .toc-sticky { display: none; }
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .search-form { display: none; }
}

/* ---------- 大手机/横屏 (≤768px) ---------- */
@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .hero-title { font-size: 1.6rem; }
  .hero-desc { font-size: .95rem; }
  .masonry-grid { columns: 2; }
  .categories-grid { grid-template-columns: 1fr 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-large { grid-column: span 1; grid-row: span 1; flex-direction: column; }
  .featured-large .featured-img { width: 100%; height: 120px; min-height: unset; }
  .featured-large .featured-body { padding: 12px; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 36px 0; }
  .container { padding: 0 16px; }
  .article-title { font-size: 1.4rem; }
  .article-meta-bar { gap: 10px; }
  .cat-hero-icon { font-size: 2.5rem; }
  .cat-hero-info h1, .tag-hero-info h1 { font-size: 1.4rem; }
  .category-hero, .tag-hero { padding: 24px 0 16px; gap: 16px; }
  .search-hero h1 { font-size: 1.3rem; }
  .search-form-page { flex-direction: column; }
  .search-form-page .btn-primary { width: 100%; text-align: center; }
  .ranking-item { flex-wrap: wrap; }
  .rank-info { min-width: 0; }
}

/* ---------- 手机竖屏 (≤480px) ---------- */
@media (max-width: 480px) {
  .hero { padding: 36px 0 32px; }
  .hero-title { font-size: 1.35rem; }
  .hero-emoji { margin-right: 6px; }
  .hero-logo-img { height: 28px; margin-right: 6px; }
  .hero-desc { font-size: .85rem; margin-bottom: 20px; }
  .hero-search {
    flex-direction: row;
    gap: 8px;
    padding: 8px 8px 8px 16px;
    border-radius: var(--radius);
  }
  .hero-search-input { flex: 1; min-width: 0; font-size: .9rem; }
  .hero-search-btn { flex-shrink: 0; width: auto; padding: 10px 18px; }
  .hero-quick-tags { gap: 6px; }
  .hero-tag { padding: 3px 10px; font-size: .76rem; }

  .section { padding: 28px 0; }
  .section-header { margin-bottom: 20px; }
  .section-title { font-size: 1.15rem; }

  .masonry-grid { columns: 1; }
  .categories-grid { grid-template-columns: 1fr; }
  .cat-card { padding: 14px; gap: 12px; align-items: flex-start; }
  .cat-icon { width: 42px; height: 42px; font-size: 1.6rem; flex-shrink: 0; }
  .cat-info { min-width: 0; }
  .cat-name { font-size: .95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .cat-desc { font-size: .78rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; white-space: normal; }

  .filter-tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .filter-tab { flex-shrink: 0; padding: 5px 12px; font-size: .76rem; }

  .platform-grid { grid-template-columns: 1fr; }

  .container { padding: 0 12px; }
  .article-title { font-size: 1.25rem; }
  .article-meta-bar { font-size: .78rem; gap: 8px; }
  .article-tags { gap: 4px; }
  .article-tag { padding: 2px 8px; font-size: .72rem; }

  .section-heading { font-size: 1.1rem; gap: 10px; padding-bottom: 10px; margin-bottom: 16px; }
  .section-num { width: 24px; height: 24px; font-size: .78rem; }

  .channel-card { flex-direction: column; text-align: center; padding: 16px; gap: 12px; }
  .channel-link { width: 100%; text-align: center; }
  .channel-rec-badge { top: -8px; right: 10px; }

  .step-item { padding: 12px 14px; gap: 12px; }
  .step-num { width: 26px; height: 26px; font-size: .78rem; }

  .ranking-item { padding: 12px 14px; gap: 10px; }

  .tips-box { padding: 14px 16px; }
  .tip-item { font-size: .84rem; }

  .toc-box { padding: 14px 16px; }
  .toc-list { gap: 4px; }
  .toc-list a { font-size: .8rem; }

  .article-footer-bar { flex-direction: column; gap: 12px; padding: 14px; }
  .like-btn { width: 100%; justify-content: center; }
  .share-section { width: 100%; justify-content: center; }

  .card-body { padding: 12px; }
  .card-title { font-size: .88rem; }
  .card-excerpt { font-size: .78rem; }

  .footer-grid { grid-template-columns: 1fr; }
  .site-footer { padding: 36px 0 20px; }

  .pagination { gap: 4px; }
  .page-btn { padding: 6px 12px; font-size: .8rem; }

  .breadcrumb-wrap { padding: 8px 0; }
  .breadcrumb { font-size: .76rem; }

  .empty-state { padding: 48px 16px; }
  .empty-icon { font-size: 3rem; }
}

/* ---------- 超小屏 (≤360px) ---------- */
@media (max-width: 360px) {
  .hero-title { font-size: 1.15rem; }
  .header-inner { gap: 8px; }
  .logo-text { font-size: .9rem; }
  .logo-icon { font-size: 1.2rem; }
  .section-heading { font-size: 1rem; }
  .article-title { font-size: 1.1rem; }
}

/* ---------- 移动端导航覆盖层优化 ---------- */
@media (max-width: 1024px) {
  .mobile-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(0,0,0,.35);
    z-index: 99;
    overflow-y: auto;
    padding: 0;
  }
  .mobile-nav.open { display: flex; flex-direction: column; }
  .mobile-nav-inner {
    background: var(--bg-card);
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    max-width: 100%;
  }
  .mobile-nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    font-size: .85rem;
    border-radius: var(--radius-sm);
  }
  .mobile-nav-search {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 480px) {
  .mobile-nav-inner {
    grid-template-columns: 1fr 1fr;
    padding: 12px;
  }
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.article-card { animation: fadeInUp .3s ease both; }

/* 骨架屏 */
.skeleton { background: linear-gradient(90deg, var(--bg-muted) 25%, var(--border) 50%, var(--bg-muted) 75%); background-size: 200% 100%; animation: shimmer 1.4s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ============================================================
   配色切换器
   ============================================================ */
.palette-switcher {
  position: relative;
  flex-shrink: 0;
}

.palette-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  font-size: 1rem;
  line-height: 1;
}
.palette-toggle:hover { background: var(--accent-lt); border-color: var(--accent); }
.palette-toggle.open { background: var(--accent-lt); border-color: var(--accent); }

.palette-panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  min-width: 200px;
  z-index: 200;
  animation: fadeInUp .18s ease both;
}
.palette-panel.open { display: block; }

.palette-panel-title {
  font-size: .75rem;
  color: var(--text-3);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.palette-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.palette-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-2);
  font-size: .85rem;
  text-align: left;
  width: 100%;
}
.palette-item:hover { background: var(--bg-muted); border-color: var(--border); color: var(--text); }
.palette-item.active { background: var(--accent-lt); border-color: var(--accent); color: var(--accent); font-weight: 600; }
.palette-item-reset { margin-top: 4px; border-top: 1px dashed var(--border); border-radius: var(--radius-sm); }
.palette-item-reset .palette-swatch { background: conic-gradient(from 0deg, #6366F1, #7C3AED, #0284C7, #16A34A, #EA580C, #6366F1); }

.palette-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1.5px solid rgba(0,0,0,.08);
}

.palette-name { flex: 1; }

/* dark 模式下面板颜色自适应（已通过 CSS 变量实现，无需额外规则） */

/* 移动端：切换器收进菜单 */
@media (max-width: 768px) {
  .palette-panel {
    right: auto;
    left: 0;
    min-width: 180px;
  }
}