/* ═══════════════════════════════════════════
   林间的自留地 — Morandi Watercolor Redesign
   Design Philosophy: Approachable Luxury
   Palette: Warm Taupe × Muted Sage × Aged Gold
   ═══════════════════════════════════════════ */

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

/* ── Watercolor Background Wash ──────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -2;
  background: #F5F0EB;
}
body::after {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  opacity: 0.25;
  background:
    radial-gradient(ellipse 80% 60% at 20% 15%, rgba(196,168,130,0.3) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 80%, rgba(163,181,166,0.25) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(184,169,154,0.15) 0%, transparent 50%),
    radial-gradient(ellipse 40% 35% at 10% 90%, rgba(196,168,130,0.2) 0%, transparent 50%);
  pointer-events: none;
}

/* Dark watercolor wash */
[data-theme="dark"] body::before {
  background: #1a1713;
}
[data-theme="dark"] body::after {
  opacity: 0.22;
  background:
    radial-gradient(ellipse 80% 60% at 15% 20%, rgba(212,184,150,0.18) 0%, transparent 55%),
    radial-gradient(ellipse 60% 55% at 85% 75%, rgba(163,181,166,0.12) 0%, transparent 55%),
    radial-gradient(ellipse 50% 45% at 50% 40%, rgba(180,160,140,0.10) 0%, transparent 50%),
    radial-gradient(ellipse 40% 35% at 10% 85%, rgba(212,184,150,0.15) 0%, transparent 50%);
}

/* ── Theme Variables ─────────────────────── */
:root {
  /* Morandi Monochromatic Palette */
  --bg: #F5F0EB;
  --bg-card: rgba(255,252,248,0.78);
  --bg-card-hover: rgba(255,252,248,0.92);
  --bg-sidebar: rgba(245,240,235,0.65);
  --bg-glass: rgba(255,252,248,0.55);
  --text: #3D3226;
  --text-secondary: #8B7D6B;
  --text-tertiary: #B8A99A;
  --border: rgba(184,169,154,0.35);
  --border-strong: rgba(184,169,154,0.55);
  --accent: #C4A882;
  --accent-hover: #B8936A;
  --accent-light: rgba(196,168,130,0.14);
  --accent-2: #A3B5A6;
  --accent-2-light: rgba(163,181,166,0.14);
  --gradient-hero: linear-gradient(160deg, #C4A882 0%, #B8A99A 40%, #A3B5A6 100%);
  --shadow-sm: 0 1px 3px rgba(61,50,38,0.05);
  --shadow-md: 0 4px 20px rgba(61,50,38,0.07);
  --shadow-lg: 0 12px 40px rgba(61,50,38,0.1);
  --shadow-card: 0 2px 12px rgba(61,50,38,0.04), 0 8px 32px rgba(61,50,38,0.05);
  --glass-blur: blur(18px);
  --glass-border: 1px solid rgba(255,252,248,0.5);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --sidebar-width: 280px;
  --content-width: 1100px;
  --toc-width: 200px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-serif: 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --transition: 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ── Subtle Dark Mode (warm night) ───────── */
[data-theme="dark"] {
  --bg: #1a1713;
  --bg-card: rgba(30,26,22,0.88);
  --bg-card-hover: rgba(38,33,28,0.94);
  --bg-sidebar: rgba(22,19,16,0.75);
  --bg-glass: rgba(35,30,26,0.6);
  --text: #e6ddd0;
  --text-secondary: #b5a590;
  --text-tertiary: #807360;
  --border: rgba(130,115,95,0.22);
  --border-strong: rgba(130,115,95,0.40);
  --accent: #d4b896;
  --accent-hover: #e2ccaf;
  --accent-light: rgba(212,184,150,0.10);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
  --shadow-card: 0 2px 16px rgba(0,0,0,0.25), 0 0 1px rgba(212,184,150,0.08);
  --glass-border: 1px solid rgba(130,115,95,0.15);
}

/* ── Base ──────────────────────────────── */
html { scroll-behavior: smooth; }
body {
  overflow-x: hidden;
  font-family: var(--font-sans);
  color: var(--text);
  line-height: 1.8;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  position: relative;
}
a { color: var(--accent); text-decoration: none; transition: all var(--transition); }
a:hover { color: var(--accent-hover); }

/* ── Reading Progress Bar ───────────────── */
#reading-progress {
  position: fixed; top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ── Layout ────────────────────────────── */
.layout {
  display: flex;
  max-width: calc(var(--sidebar-width) + var(--content-width) + var(--toc-width) + 120px);
  margin: 0 auto;
  min-height: 100vh;
}

/* ── Sidebar — Frosted Glass Panel ─────── */
.sidebar {
  width: var(--sidebar-width); flex-shrink: 0;
  padding: 40px 28px;
  background: var(--bg-sidebar);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: var(--glass-border);
  position: sticky; top: 0;
  height: 100vh; overflow-y: auto;
  display: flex; flex-direction: column;
  transition: background var(--transition), border-color var(--transition);
}

.sidebar-brand {
  font-family: var(--font-serif);
  font-size: 26px; font-weight: 700; color: var(--text);
  letter-spacing: 1px; margin-bottom: 2px;
  position: relative;
}
.sidebar-brand::after {
  content: '';
  display: block; width: 32px; height: 2px;
  background: var(--accent); margin-top: 8px;
  border-radius: 1px;
}
.sidebar-brand:hover { color: var(--accent); }

.sidebar-tagline {
  font-size: 12px; color: var(--text-tertiary);
  font-weight: 400; letter-spacing: 0.8px;
  margin-bottom: 28px; margin-top: 6px;
  font-style: italic;
}

/* Sidebar search */
.sidebar-search {
  margin-bottom: 20px;
}
.sidebar-search input {
  width: 100%; padding: 10px 14px;
  border: var(--glass-border); border-radius: var(--radius-xs);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  color: var(--text);
  font-size: 13px; font-family: inherit;
  transition: all var(--transition);
}
.sidebar-search input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
  background: var(--bg-card);
}
#search-results {
  margin-top: 8px; display: none;
}
#search-results a {
  display: block; padding: 6px 0;
  font-size: 13px; color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
#search-results a:hover { color: var(--accent); }

/* Sidebar nav */
.sidebar-nav {
  display: flex; flex-direction: column; gap: 2px;
  margin-bottom: 24px;
}
.sidebar-nav a {
  font-size: 14px; color: var(--text-secondary);
  padding: 10px 14px; border-radius: var(--radius-xs);
  font-weight: 500; transition: all var(--transition);
  position: relative;
}
.sidebar-nav a.active {
  background: var(--accent-light); color: var(--accent);
  font-weight: 600;
}
.sidebar-nav a:hover { background: var(--accent-light); color: var(--accent); }

/* Sidebar Widgets */
.sidebar-widget {
  margin-bottom: 24px; padding-top: 16px;
  border-top: 1px solid var(--border);
}
.sidebar-widget-title {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 2px; color: var(--text-tertiary);
  margin-bottom: 12px;
}

/* Popular posts */
.popular-post {
  display: block; padding: 8px 0;
  font-size: 13px; color: var(--text-secondary);
  line-height: 1.5; transition: all var(--transition);
}
.popular-post:hover { color: var(--accent); padding-left: 6px; }
.popular-post .popular-date {
  font-size: 11px; color: var(--text-tertiary);
  display: block;
}

/* Social links */
.social-links {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.social-link {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 8px 14px; border-radius: 100px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: var(--glass-border);
  font-size: 12px; color: var(--text-secondary);
  transition: all var(--transition);
}
.social-link:hover {
  border-color: var(--accent); color: var(--accent);
  background: var(--accent-light);
}

/* Theme toggle */
.theme-toggle {
  margin-top: auto; padding-top: 16px;
  border-top: 1px solid var(--border);
}
.theme-btn {
  width: 100%; padding: 10px;
  border: var(--glass-border); border-radius: var(--radius-xs);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  color: var(--text);
  font-size: 13px; font-family: inherit; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: all var(--transition);
}
.theme-btn:hover { border-color: var(--accent); background: var(--accent-light); }

/* ── Main Content Area ─────────────────── */
.main {
  flex: 1; padding: 60px 32px;
  max-width: var(--content-width);
}

/* ═══════════════════════════════════════════
   HERO — Home Page Centerpiece
   ═══════════════════════════════════════════ */
.hero {
  overflow: hidden;
  padding: 48px 0 56px; margin-bottom: 40px;
  position: relative;
  text-align: center;
}
.hero::after {
  content: '';
  display: block; margin: 40px auto 0;
  width: 48px; height: 1.5px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.hero-avatar {
  font-size: 56px; margin-bottom: 20px; display: block;
  filter: drop-shadow(0 4px 12px rgba(61,50,38,0.08));
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 44px; font-weight: 700; letter-spacing: 1px;
  line-height: 1.2; margin-bottom: 16px;
  color: var(--text);
}
.hero h1 .accent {
  color: var(--accent);
  background: linear-gradient(160deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-bio {
  font-size: 16px; color: var(--text-secondary);
  max-width: 460px; margin: 0 auto 24px; line-height: 1.8;
  font-style: italic;
}
.hero-stats {
  display: flex; gap: 40px; justify-content: center;
}
.hero-stat {
  text-align: center;
  padding: 16px 28px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.hero-stat:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.hero-stat-num {
  font-size: 30px; font-weight: 700; color: var(--accent);
  font-family: var(--font-serif);
}
.hero-stat-label {
  font-size: 11px; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 1.5px;
  margin-top: 4px;
}

/* ── Section Title ──────────────────────── */
.section-title {
  font-family: var(--font-serif);
  font-size: 14px; font-weight: 600;
  letter-spacing: 2px; color: var(--text-tertiary);
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px;
}
.section-title::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

/* ═══════════════════════════════════════════
   POST CARDS — Glassmorphism Layered Cards
   ═══════════════════════════════════════════ */
.post-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 20px;
  transition: all var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
}
.post-card::before {
  content: ''; position: absolute; inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(196,168,130,0.04) 0%, transparent 50%);
  pointer-events: none;
}
.post-card::after {
  content: ''; position: absolute; left: -1px; top: 16px;
  width: 3px; height: calc(100% - 32px);
  background: var(--accent);
  border-radius: 0 3px 3px 0;
  transform: scaleY(0); transition: transform var(--transition);
  opacity: 0.6;
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(196,168,130,0.3);
  background: var(--bg-card-hover);
}
.post-card:hover::after { transform: scaleY(1); }

/* Featured variant */
.post-featured {
  border-color: rgba(163,181,166,0.3);
  background: linear-gradient(135deg, rgba(163,181,166,0.06), var(--bg-card));
}
.post-featured::after { background: var(--accent-2); }

.post-card-title {
  font-family: var(--font-serif);
  font-size: 22px; font-weight: 600; color: var(--text);
  letter-spacing: 0.5px; line-height: 1.4;
  display: block; margin-bottom: 10px;
  transition: color var(--transition);
}
.post-card-title:hover { color: var(--accent); }

.post-card-meta {
  font-size: 12px; color: var(--text-tertiary);
  margin-bottom: 10px; display: flex; gap: 18px; align-items: center;
  letter-spacing: 0.5px;
}
.post-card-excerpt {
  font-size: 14px; color: var(--text-secondary);
  line-height: 1.75;
}
.post-card-tags {
  display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap;
}
.tag {
  font-size: 11px; font-weight: 500; padding: 4px 12px;
  background: var(--accent-light); color: var(--accent);
  border-radius: 100px; letter-spacing: 0.5px;
  border: 1px solid rgba(196,168,130,0.2);
  transition: all var(--transition);
}
.tag:hover { background: var(--accent); color: #fff; }

/* ── Tag Cloud ──────────────────────────── */
.tag-cloud {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-bottom: 40px;
}
.tag-cloud a {
  padding: 8px 18px; border-radius: 100px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: var(--glass-border);
  color: var(--text-secondary);
  font-size: 13px; font-weight: 500;
  transition: all var(--transition);
}
.tag-cloud a:hover {
  background: var(--accent);
  color: #fff; border-color: var(--accent);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════
   ARTICLE PAGE — Scholarly Reading Mode
   ═══════════════════════════════════════════ */
.article-layout {
  display: flex; gap: 40px;
  position: relative;
}
.article-body { flex: 1; min-width: 0; }

.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-tertiary);
  margin-bottom: 24px; transition: all var(--transition);
  letter-spacing: 0.5px;
}
.back-link:hover { color: var(--accent); transform: translateX(-3px); }

.article-header { margin-bottom: 44px; }
.article-header h1 {
  font-family: var(--font-serif);
  font-size: 38px; font-weight: 700; letter-spacing: 0.5px;
  line-height: 1.3; margin-bottom: 18px;
  color: var(--text);
}
.article-meta {
  display: flex; gap: 24px; font-size: 14px; color: var(--text-tertiary);
}

/* TOC */
.toc {
  width: var(--toc-width); flex-shrink: 0;
  position: sticky; top: 40px;
  align-self: flex-start; max-height: calc(100vh - 80px);
  overflow-y: auto; padding-left: 20px;
  border-left: 1.5px solid var(--border);
  font-size: 13px; display: none;
}
@media (min-width: 1200px) { .toc { display: block; } }
.toc-title {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 2px; color: var(--text-tertiary);
  margin-bottom: 14px;
}
.toc a {
  display: block; padding: 5px 0; color: var(--text-secondary);
  line-height: 1.5; transition: all var(--transition);
}
.toc a:hover, .toc a.active { color: var(--accent); padding-left: 4px; }
.toc .toc-h3 { padding-left: 14px; font-size: 12px; }

/* Article Content */
.article-content {
  overflow-x: auto;
  font-size: 17px; line-height: 2;
  color: var(--text);
  font-family: var(--font-sans);
}
.article-content p { margin-bottom: 26px; }
.article-content h2 {
  font-family: var(--font-serif);
  font-size: 26px; font-weight: 700; margin: 56px 0 22px;
  letter-spacing: 0.5px; color: var(--text);
  padding-top: 24px;
  position: relative;
}
.article-content h2::before {
  content: '§'; position: absolute; left: -28px; top: 24px;
  color: var(--accent); font-size: 18px; opacity: 0.4;
}
.article-content h3 {
  font-family: var(--font-serif);
  font-size: 20px; font-weight: 600; margin: 40px 0 16px;
  color: var(--text-secondary);
}
.article-content ul, .article-content ol {
  margin-bottom: 26px; padding-left: 26px;
}
.article-content li { margin-bottom: 10px; }
.article-content strong { font-weight: 700; color: var(--accent); }
.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-light);
  padding: 20px 24px; margin: 32px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic; color: var(--text-secondary);
  font-family: var(--font-serif);
  backdrop-filter: blur(8px);
}
.article-content blockquote p { margin-bottom: 0; }
.article-content code {
  background: var(--accent-light); padding: 3px 8px;
  border-radius: 4px; font-size: 0.88em; font-family: var(--font-mono);
  color: var(--accent);
}
.article-content pre {
  background: rgba(30,27,24,0.92); color: #E8E0D5;
  padding: 22px 28px; border-radius: var(--radius);
  overflow-x: auto; margin-bottom: 28px;
  font-size: 13px; line-height: 1.7;
  border: var(--glass-border);
  backdrop-filter: blur(12px);
}
.article-content pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.article-content table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 15px; display: block; overflow-x: auto; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; white-space: nowrap; }
.article-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0;
  box-shadow: var(--shadow-md); }

/* Article Footer */
.article-footer {
  margin-top: 64px; padding-top: 28px;
  border-top: 1px solid var(--border);
}
.article-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.article-share {
  display: flex; gap: 10px; font-size: 13px; color: var(--text-secondary);
  align-items: center; flex-wrap: wrap;
}
.article-share span { font-size: 13px; color: var(--text-tertiary); }

/* Divider */
.article-divider {
  border: none; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 52px 0 44px;
}

/* ── Share Buttons ──────────────────────── */
.share-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 7px 16px; border-radius: 100px;
  font-size: 13px; font-weight: 500; text-decoration: none;
  transition: all var(--transition);
  border: var(--glass-border);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
}
.share-btn.wechat:hover { background: #ecfdf5; color: #059669; border-color: #059669; }
.share-btn.weibo:hover { background: #fef2f2; color: #dc2626; border-color: #dc2626; }
.share-btn.copy:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }
.share-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ── Related Posts ──────────────────────── */
.related-posts { margin: 36px 0; }
.related-posts h2 {
  font-family: var(--font-serif);
  font-size: 18px; font-weight: 600; margin-bottom: 18px;
}
.related-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; border-bottom: 1px solid var(--border);
  text-decoration: none; transition: all var(--transition);
}
.related-item:last-child { border-bottom: none; }
.related-item:hover { padding-left: 10px; }
.related-title { font-size: 15px; font-weight: 500; color: var(--text); }
.related-item:hover .related-title { color: var(--accent); }
.related-date { font-size: 12px; color: var(--text-tertiary); flex-shrink: 0; margin-left: 20px; }

/* ── Comments ───────────────────────────── */
.comments-section h2 {
  font-family: var(--font-serif);
  font-size: 20px; font-weight: 600; margin-bottom: 28px;
}
.comment-item {
  display: flex; gap: 14px; margin-bottom: 24px;
  padding-bottom: 20px; border-bottom: 1px solid var(--border);
}
.comment-avatar { border-radius: 50%; flex-shrink: 0;
  box-shadow: var(--shadow-sm); }
.comment-body strong { font-size: 14px; }
.comment-body p { margin-top: 8px; font-size: 15px; color: var(--text-secondary); line-height: 1.75; }
.comment-body p img { max-width: 100%; border-radius: var(--radius-xs); margin-top: 10px; }
.comment-form input, .comment-form textarea {
  display: block; width: 100%; padding: 13px 18px;
  margin-bottom: 12px; border: var(--glass-border);
  border-radius: var(--radius-sm); font-size: 15px;
  font-family: inherit; background: var(--bg-glass);
  backdrop-filter: blur(8px);
  color: var(--text);
  transition: all var(--transition);
}
.comment-form input:focus, .comment-form textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
  background: var(--bg-card);
}
.comment-form textarea { resize: vertical; }
.comment-actions { display: flex; gap: 10px; align-items: center; }
.comment-form button {
  background: var(--accent); color: #fff; border: none;
  padding: 12px 28px; border-radius: 100px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
}
.comment-form button:hover {
  opacity: 0.9; transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(196,168,130,0.3);
}
.upload-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border: var(--glass-border);
  border-radius: 100px; font-size: 13px;
  color: var(--text-secondary); cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-glass);
}
.upload-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── Review Page ────────────────────────── */
.review-list { list-style: none; }
.review-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 0; border-bottom: 1px solid var(--border);
}
.review-item a {
  font-family: var(--font-serif);
  font-size: 16px; font-weight: 600; color: var(--text);
}
.review-item a:hover { color: var(--accent); }
.review-item span { font-size: 13px; color: var(--text-tertiary); flex-shrink: 0; }

/* ── 404 / Empty State ──────────────────── */
.empty-state {
  text-align: center; padding: 100px 0; color: var(--text-tertiary);
}
.empty-state .emoji { font-size: 48px; display: block; margin-bottom: 16px; }
.empty-state p { font-style: italic; }

/* ── Mobile Bar ─────────────────────────── */
.mobile-bar {
  display: none;
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  padding: 12px 20px;
  align-items: center; justify-content: space-between;
}
.hamburger {
  background: none; border: none; font-size: 22px;
  cursor: pointer; color: var(--text); padding: 4px;
}
.mobile-brand {
  font-family: var(--font-serif);
  font-size: 18px; font-weight: 700; color: var(--text);
  letter-spacing: 0.5px; text-decoration: none;
}
.theme-btn-mobile {
  background: none; border: none; font-size: 20px;
  cursor: pointer; padding: 4px;
}

/* Sidebar overlay */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(61,50,38,0.2);
  backdrop-filter: blur(4px);
  z-index: 99;
}
.sidebar-overlay.active { display: block; }
.sidebar-close { display: none; }

/* ── Mobile Responsive ──────────────────── */
@media (max-width: 900px) {
  .layout { display: block; }
  .mobile-bar { display: flex; }
  .sidebar {
    position: fixed; top: 0; left: -100%;
    z-index: 100; width: 280px; height: 100vh;
    transition: left var(--transition);
    border-right: var(--glass-border);
  }
  .sidebar.active { left: 0; }
  .sidebar-close {
    display: block; position: absolute;
    top: 16px; right: 16px;
    font-size: 22px; cursor: pointer;
    color: var(--text-tertiary);
  }
  .main { padding: 30px 20px; max-width: 100%; }
  .hero h1 { font-size: 32px; }
  .article-header h1 { font-size: 28px; }
  .article-layout { display: block; }
  .toc { display: none !important; }
  .hero-stats { gap: 20px; }
  .hero-stat { padding: 12px 18px; }
  .hero-stat-num { font-size: 24px; }
}

/* ═══════════════════════════════════════════
   DARK MODE — Component Refinements
   ═══════════════════════════════════════════ */
[data-theme="dark"] .hero-orb--tl { background: radial-gradient(circle, rgba(212,184,150,0.22) 0%, transparent 70%); }
[data-theme="dark"] .hero-orb--br { background: radial-gradient(circle, rgba(163,181,166,0.18) 0%, transparent 70%); }
[data-theme="dark"] .hero-orb--ct { background: radial-gradient(ellipse, rgba(212,184,150,0.10) 0%, transparent 70%); }
[data-theme="dark"] .hero-badge { background: rgba(212,184,150,0.08); border-color: rgba(212,184,150,0.2); }
[data-theme="dark"] .hero-divider__dot { opacity: 0.5; }
[data-theme="dark"] .hero-motto::before,
[data-theme="dark"] .hero-motto::after { color: rgba(212,184,150,0.2); }
[data-theme="dark"] .post-card { border-color: rgba(130,115,95,0.15); }
[data-theme="dark"] .post-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.35), 0 0 0 1px rgba(212,184,150,0.1); border-color: rgba(212,184,150,0.2); }
[data-theme="dark"] .post-card__accent { opacity: 0.25; }
[data-theme="dark"] .post-card:hover .post-card__accent { opacity: 0.8; }
[data-theme="dark"] .post-card--featured { border-color: rgba(163,181,166,0.15); }
[data-theme="dark"] .post-card--featured:hover { border-color: rgba(163,181,166,0.25); }
[data-theme="dark"] .sidebar { border-right-color: rgba(130,115,95,0.12); }
[data-theme="dark"] .sidebar-nav a.active { background: rgba(212,184,150,0.1); }
[data-theme="dark"] .sidebar-nav a:hover { background: rgba(212,184,150,0.06); }
[data-theme="dark"] .sidebar-search input { background: rgba(35,30,26,0.5); border-color: rgba(130,115,95,0.2); }
[data-theme="dark"] .sidebar-search input:focus { border-color: var(--accent); background: rgba(40,34,28,0.7); }
[data-theme="dark"] .theme-btn { border-color: rgba(130,115,95,0.2); background: rgba(35,30,26,0.4); }
[data-theme="dark"] .theme-btn:hover { border-color: rgba(212,184,150,0.3); background: rgba(212,184,150,0.08); }
[data-theme="dark"] .mobile-bar { border-bottom-color: rgba(130,115,95,0.12); }
[data-theme="dark"] .sidebar-overlay.active { background: rgba(0,0,0,0.3); }
[data-theme="dark"] .article-content blockquote { background: rgba(212,184,150,0.05); border-left-color: rgba(212,184,150,0.5); }
[data-theme="dark"] .article-content code { background: rgba(212,184,150,0.1); }
[data-theme="dark"] .article-content pre { background: rgba(20,18,15,0.95); border-color: rgba(130,115,95,0.2); }
[data-theme="dark"] .tag { background: rgba(212,184,150,0.08); border-color: rgba(212,184,150,0.15); }
[data-theme="dark"] .tag:hover { background: var(--accent); color: #1a1713; }
[data-theme="dark"] .section-title__ornament { opacity: 0.6; }
[data-theme="dark"] .social-link { background: rgba(35,30,26,0.5); border-color: rgba(130,115,95,0.15); }
[data-theme="dark"] .social-link:hover { border-color: var(--accent); background: rgba(212,184,150,0.08); }
[data-theme="dark"] .share-btn { background: rgba(35,30,26,0.5); border-color: rgba(130,115,95,0.15); }
[data-theme="dark"] .home-footer__text { color: var(--text-tertiary); }

/* ═══════════════════════════════════════════
   HERO — Orbs, Badge, Divider, Motto
   ═══════════════════════════════════════════ */
.hero-orb {
  position: absolute; border-radius: 50%;
  pointer-events: none; z-index: -1;
}
.hero-orb--tl {
  width: 320px; height: 320px; top: -80px; left: -60px;
  background: radial-gradient(circle, rgba(196,168,130,0.18) 0%, transparent 70%);
  animation: float-orb 8s ease-in-out infinite;
}
.hero-orb--br {
  width: 260px; height: 260px; bottom: -60px; right: -40px;
  background: radial-gradient(circle, rgba(163,181,166,0.15) 0%, transparent 70%);
  animation: float-orb 10s ease-in-out infinite reverse;
}
.hero-orb--ct {
  width: 200px; height: 200px; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(196,168,130,0.08) 0%, transparent 70%);
  animation: float-orb 12s ease-in-out infinite;
}
@keyframes float-orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(10px, -15px) scale(1.05); }
}
.hero-orb--ct { animation-name: float-orb-ct; }
@keyframes float-orb-ct {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -55%) scale(1.08); }
}

.hero-badge {
  display: inline-block;
  padding: 6px 18px; margin-bottom: 24px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid rgba(196,168,130,0.25);
  border-radius: 100px;
}

.hero-divider {
  display: flex; gap: 8px; justify-content: center;
  margin: 24px 0;
}
.hero-divider__dot {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent); opacity: 0.4;
}

.hero-motto {
  font-family: var(--font-serif);
  font-size: 15px; font-style: italic;
  color: var(--text-secondary);
  position: relative; display: inline-block;
  padding: 0 28px;
}
.hero-motto::before, .hero-motto::after {
  position: absolute; font-size: 24px;
  color: var(--accent); opacity: 0.3;
  font-family: var(--font-serif);
}
.hero-motto::before { content: '"'; left: 0; top: -4px; }
.hero-motto::after { content: '"'; right: 0; bottom: -4px; }

/* ── Posts Grid ─────────────────────────── */
.posts-grid {
  display: flex; flex-direction: column; gap: 20px;
}

/* ── Content Section ────────────────────── */
.content-section {
  margin-bottom: 48px;
}

/* ── Meta Dot ───────────────────────────── */
.meta-dot {
  color: var(--text-tertiary); font-size: 10px;
}

/* ── Home Footer ────────────────────────── */
.home-footer {
  padding: 48px 0 32px; text-align: center;
}
.home-footer__line {
  width: 60px; height: 1.5px; margin: 0 auto 20px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.home-footer__text {
  font-size: 13px; color: var(--text-tertiary);
  letter-spacing: 0.5px;
}

/* ── Post Card Accent Bar ───────────────── */
.post-card__accent {
  position: absolute; left: 0; top: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 3px 0 0 3px;
  opacity: 0; transition: opacity var(--transition);
}
.post-card:hover .post-card__accent { opacity: 1; }
.post-card--featured .post-card__accent { opacity: 0.4; }
.post-card--featured:hover .post-card__accent { opacity: 1; }
.post-card--featured {
  border-color: rgba(163,181,166,0.3);
  background: linear-gradient(135deg, rgba(163,181,166,0.06), var(--bg-card));
}

/* Mobile Navigation Bar */
.mobile-nav {
  display: flex;
  gap: 0;
  border-top: 1px solid rgba(196,168,130,0.15);
  margin-top: 8px;
  padding-top: 8px;
}
.mobile-nav a {
  flex: 1;
  text-align: center;
  padding: 6px 0;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: color var(--transition), background var(--transition);
}
.mobile-nav a:hover, .mobile-nav a:active {
  color: var(--accent);
  background: rgba(196,168,130,0.08);
}
.mobile-bar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* 整个卡片可点击 */
.post-card {
  position: relative;
  cursor: pointer;
}
.post-card-tags { position: relative; z-index: 2; }