/* ============================================================
   Dan Koe 知识库 — 中文版样式
   ============================================================ */

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --bg-section: #0d0d14;
  --border: #1e1e2e;
  --border-light: #2a2a3e;
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --text-dim: #555570;
  --accent: #7c6af7;
  --accent-glow: rgba(124, 106, 247, 0.15);
  --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Inter', -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.6);
  --transition: 0.2s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   导航栏
   ============================================================ */

.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 0 32px;
  height: 60px;
}

.nav-logo {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  letter-spacing: 0;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 24px;
  flex: 1;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-search {
  position: relative;
  width: 240px;
}

.nav-search input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 13px;
  color: var(--text);
  outline: none;
  font-family: var(--font-sans);
  transition: border-color var(--transition);
}

.nav-search input:focus { border-color: var(--accent); }
.nav-search input::placeholder { color: var(--text-dim); }

.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  max-height: 400px;
  overflow-y: auto;
  display: none;
  z-index: 200;
}

.search-dropdown.active { display: block; }

.search-result-item {
  display: block;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-card-hover); }
.search-result-item .sr-cat { font-size: 11px; color: var(--text-muted); margin-bottom: 3px; }
.search-result-item .sr-title { font-size: 13px; font-weight: 500; color: var(--text); }

/* ============================================================
   Hero 首屏
   ============================================================ */

.hero {
  padding: 100px 32px 80px;
  text-align: center;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,106,247,0.08) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
}

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(124,106,247,0.3);
  border-radius: 100px;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: clamp(44px, 8vw, 76px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-sub { color: var(--accent); }

.hero-desc {
  max-width: 560px;
  margin: 0 auto 40px;
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
}

.hero-stats .stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.hero-stats .stat strong {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

.hero-stats .stat span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================================
   通用 Section
   ============================================================ */

.section { padding: 80px 0; }

.section-dark {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-sub {
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 15px;
}

.section-cta { text-align: center; margin-top: 40px; }

.btn-outline {
  display: inline-block;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 10px 24px;
  font-size: 14px;
  color: var(--text-muted);
  transition: all var(--transition);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================================
   分类导航
   ============================================================ */

.categories-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}

.cat-nav-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  text-align: center;
}

.cat-nav-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.cat-icon { font-size: 24px; }
.cat-name { font-size: 13px; font-weight: 500; color: var(--text); }
.cat-count { font-size: 12px; color: var(--text-muted); }

/* ============================================================
   概念卡片
   ============================================================ */

.concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
  display: block;
}

.concept-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.concept-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.concept-en-small {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 10px;
  font-style: italic;
}

.concept-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.concept-count {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 2px 10px;
}

/* ============================================================
   精选文章卡片
   ============================================================ */

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition);
}

.featured-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.featured-card .card-cat {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.featured-card h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.card-en {
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.4;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}

.card-concepts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.mini-tag {
  font-size: 11px;
  font-weight: 500;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  padding: 2px 7px;
}

.card-words {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ============================================================
   文章网格（概念/分类页）
   ============================================================ */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all var(--transition);
}

.article-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.article-card .card-cat { font-size: 12px; color: var(--text-muted); }

.article-card h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.card-excerpt {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.article-card .card-words { font-size: 12px; color: var(--text-dim); }

/* ============================================================
   全部文章列表页
   ============================================================ */

.cat-section { margin-bottom: 48px; }

.cat-section-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.cat-count-badge {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 2px 10px;
}

.list-group {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  gap: 16px;
}

.list-item:last-child { border-bottom: none; }
.list-item:hover { background: var(--bg-card); }

.list-item-main { flex: 1; min-width: 0; }

.list-item-main h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
}

.list-en {
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-concepts {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.list-item-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  white-space: nowrap;
}

.list-item-meta span { font-size: 12px; color: var(--text-dim); }

/* ============================================================
   文章详情页
   ============================================================ */

.article-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  min-height: calc(100vh - 60px);
}

.article-sidebar {
  border-right: 1px solid var(--border);
  padding: 40px 28px;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
}

.sidebar-section { margin-bottom: 32px; }

.sidebar-section h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.cat-badge:hover { border-color: var(--border-light); }

.concept-tags {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.concept-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid;
  transition: opacity var(--transition);
}

.concept-tag:hover { opacity: 0.8; }

.key-quote {
  font-size: 13px;
  color: var(--text);
  background: rgba(124,106,247,0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 10px 14px;
  margin-bottom: 12px;
  line-height: 1.7;
  font-style: normal;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.stat-item:last-child { border-bottom: none; }
.stat-item span { color: var(--text-muted); }
.stat-item strong { color: var(--text); }

.article-main {
  padding: 52px 72px;
  max-width: 860px;
}

.article-header { margin-bottom: 40px; }

.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  display: inline-block;
  margin-bottom: 16px;
}

.article-header h1 {
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 8px;
}

.title-en {
  font-size: 14px;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.4;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.source-link { color: var(--accent); font-size: 13px; }
.source-link:hover { text-decoration: underline; }

/* ============================================================
   中英文切换 Tab
   ============================================================ */

.lang-tabs {
  display: flex;
  gap: 4px;
  margin-top: 20px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}

.lang-tab {
  position: relative;
  bottom: -2px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  letter-spacing: 0.02em;
}

.lang-tab:hover {
  color: var(--text);
}

.lang-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel {
  margin-top: 32px;
}

/* 文章正文排版（中文/英文通用基础） */
.article-content,
.content-zh,
.en-original-body {
  font-size: 17px;
  line-height: 2.0;
  color: #d4d4e8;
}

/* 中文正文字体稍大，行距更宽 */
.content-zh {
  font-size: 17px;
  line-height: 2.05;
  color: #dcdcf0;
}

.article-content h1, .article-content h2,
.content-zh h1, .content-zh h2 {
  font-size: 21px;
  font-weight: 700;
  margin: 52px 0 18px;
  color: var(--text);
  letter-spacing: -0.3px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.article-content h3, .content-zh h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 40px 0 14px;
  color: var(--text);
}

.article-content h4, .content-zh h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 28px 0 10px;
  color: #b0b0cc;
}

.article-content p, .content-zh p { margin-bottom: 22px; }

.article-content ul, .content-zh ul {
  margin: 16px 0 24px 8px;
  padding-left: 20px;
}

.article-content li, .content-zh li {
  margin-bottom: 12px;
  padding-left: 4px;
}

.article-content strong, .content-zh strong {
  color: var(--text);
  font-weight: 600;
}

.article-content em, .content-zh em { color: var(--text-muted); }

/* 正文内引用块 */
.article-content blockquote, .content-zh blockquote {
  background: rgba(124,106,247,0.07);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 28px 0;
  color: #c0c0dc;
  font-size: 16px;
  line-height: 1.85;
  font-style: italic;
}

/* ============================================================
   相关文章
   ============================================================ */

.related-section {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  padding: 60px 0;
}

.related-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  transition: all var(--transition);
}

.related-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.related-cat { font-size: 11px; color: var(--text-muted); }

.related-card h4 {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text);
}

.related-en {
  font-size: 11px;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.3;
}

.related-words { font-size: 11px; color: var(--text-dim); }

/* ============================================================
   概念详情页
   ============================================================ */

.concept-hero {
  padding: 60px 0 48px;
  border-bottom: 1px solid var(--border);
}

.concept-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.concept-hero h1 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 6px;
}

.concept-en {
  font-size: 16px;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 16px;
}

.concept-desc {
  max-width: 620px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.concept-stats span {
  font-size: 14px;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 14px;
}

.concept-keywords { margin: 32px 0; }

.concept-keywords h3 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.keyword {
  font-size: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  color: var(--text-muted);
}

/* ============================================================
   概念总览页
   ============================================================ */

.concepts-full-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.concept-full-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: block;
  transition: all var(--transition);
}

.concept-full-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
}

.concept-full-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.concept-full-header h2 {
  font-size: 20px;
  font-weight: 700;
}

.concept-en-badge {
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 2px 10px;
}

.concept-full-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 700px;
}

/* ============================================================
   分类详情页
   ============================================================ */

.category-hero {
  padding: 60px 0 48px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.cat-icon-large { font-size: 48px; margin-bottom: 16px; }

.category-hero h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.cat-en {
  font-size: 14px;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 8px;
}

.cat-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 16px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.article-count {
  font-size: 14px;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 14px;
}

/* ============================================================
   通用页头
   ============================================================ */

.page-header {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.page-header p { color: var(--text-muted); font-size: 15px; }

/* ============================================================
   页脚
   ============================================================ */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 80px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.site-footer p { font-size: 13px; color: var(--text-muted); }
.site-footer a { color: var(--accent); }

.footer-links { display: flex; gap: 20px; }

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--text); }

/* ============================================================
   中文导读区块
   ============================================================ */

.article-summary {
  background: linear-gradient(135deg, rgba(124,106,247,0.10) 0%, rgba(124,106,247,0.04) 100%);
  border: 1px solid rgba(124,106,247,0.30);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin: 0 0 40px 0;
}

.summary-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.summary-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.article-summary p {
  color: #d8d8f0;
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
}

/* ============================================================
   内容区块（中文正文 / 英文原文）
   ============================================================ */

.content-section {
  margin-bottom: 48px;
}

.content-section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  width: 100%;
}

.content-zh .content-section-label {
  color: #34d399;
  border-bottom-color: rgba(52,211,153,0.3);
}

.content-zh .content-section-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #34d399;
  border-radius: 50%;
}

/* ============================================================
   折叠英文原文
   ============================================================ */

.en-original {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.en-original-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  list-style: none;
  user-select: none;
  transition: background var(--transition), color var(--transition);
}

.en-original-toggle::-webkit-details-marker { display: none; }

.en-original-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text);
}

.en-original[open] .en-original-toggle {
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.toggle-hint {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
}

.en-original-body {
  padding: 32px 40px;
  background: rgba(0,0,0,0.2);
}

.en-original-body p,
.en-original-body li {
  color: #7878a0;
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.en-original-body h1,
.en-original-body h2 {
  color: #9090b8;
  font-size: 17px;
  font-weight: 600;
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.en-original-body h3 {
  color: #8888b0;
  font-size: 15px;
  font-weight: 600;
  margin: 24px 0 10px;
}

.en-original-body ul {
  margin: 12px 0 20px 8px;
  padding-left: 18px;
}

.en-original-body li { margin-bottom: 10px; }

.en-original-body blockquote {
  border-left: 2px solid var(--border-light);
  padding: 10px 16px;
  color: #6868a0;
  font-style: italic;
  margin: 16px 0;
  background: rgba(255,255,255,0.02);
  border-radius: 0 4px 4px 0;
}

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

@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }

  .article-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .article-main { padding: 32px 24px; }
  .hero-stats { gap: 24px; }
  .featured-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .top-nav { padding: 0 16px; gap: 16px; }
  .nav-search { display: none; }
  .hero { padding: 60px 16px 48px; }
  .hero-stats { gap: 16px; flex-wrap: wrap; }
  .article-sidebar { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}