/* ========================================
   卡片主题 CSS 变量与全局样式
   ======================================== */

:root {
  --bg-body: #f5f5f7;
  --bg-card: rgba(255, 255, 255, 0.90);
  --bg-nav: rgba(255, 255, 255, 0.80);
  --bg-code: #f6f8fa;

  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;

  --accent: #5e5ce6;
  --accent-hover: #4b49c9;
  --accent-light: #eeedff;

  --border: #e5e5ea;
  --border-light: #f0f0f2;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;

  --nav-height: 56px;
  --content-max-width: 960px;
  --wide-max-width: 1200px;
}

html.dark {
  --bg-body: #111113;
  --bg-card: rgba(28, 28, 30, 0.88);
  --bg-nav: rgba(28,28,30,0.80);
  --bg-code: #2c2c2e;

  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #636366;

  --accent: #8b8cf7;
  --accent-hover: #a5a6f9;
  --accent-light: #2c2c3e;

  --border: #38383a;
  --border-light: #2c2c2e;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
}

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

html { scroll-behavior: smooth; }

html, body {
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ===== 阅读进度条 ===== */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6, #ec4899);
  width: 0%;
  z-index: 9999;
  transition: width 100ms ease-out;
  pointer-events: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.4;
}

h2 { font-size: 1.5rem; margin: 1.5em 0 0.6em; }
h3 { font-size: 1.25rem; margin: 1.2em 0 0.5em; }

/* ===== 固定导航栏 ===== */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-inner {
  max-width: var(--wide-max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  gap: var(--space-sm);
}

.nav-logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.3px;
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2px;
  margin-left: auto;
}

.nav-links li a {
  display: block;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-links li a:hover {
  color: var(--text-primary);
  background: var(--accent-light);
}

.nav-links li a.active {
  color: var(--accent);
  background: var(--accent-light);
}

/* RSS icon in nav */
.nav-links li a[href="/feed.xml"] {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.nav-links li a[href="/feed.xml"]::before {
  content: '';
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M6.18 15.64a2.18 2.18 0 0 1 2.18 2.18C8.36 19 7.38 20 6.18 20 5 20 4 19 4 17.82a2.18 2.18 0 0 1 2.18-2.18M4 4.44A15.56 15.56 0 0 1 19.56 20h-2.83A12.73 12.73 0 0 0 4 7.27V4.44m0 5.66a9.9 9.9 0 0 1 9.9 9.9h-2.83A7.07 7.07 0 0 0 4 12.93V10.1Z'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M6.18 15.64a2.18 2.18 0 0 1 2.18 2.18C8.36 19 7.38 20 6.18 20 5 20 4 19 4 17.82a2.18 2.18 0 0 1 2.18-2.18M4 4.44A15.56 15.56 0 0 1 19.56 20h-2.83A12.73 12.73 0 0 0 4 7.27V4.44m0 5.66a9.9 9.9 0 0 1 9.9 9.9h-2.83A7.07 7.07 0 0 0 4 12.93V10.1Z'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask-size: contain;
  mask-size: contain;
}

/* Same for mobile overlay */
.nav-overlay-links li a[href="/feed.xml"] {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-overlay-links li a[href="/feed.xml"]::before {
  content: '';
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M6.18 15.64a2.18 2.18 0 0 1 2.18 2.18C8.36 19 7.38 20 6.18 20 5 20 4 19 4 17.82a2.18 2.18 0 0 1 2.18-2.18M4 4.44A15.56 15.56 0 0 1 19.56 20h-2.83A12.73 12.73 0 0 0 4 7.27V4.44m0 5.66a9.9 9.9 0 0 1 9.9 9.9h-2.83A7.07 7.07 0 0 0 4 12.93V10.1Z'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M6.18 15.64a2.18 2.18 0 0 1 2.18 2.18C8.36 19 7.38 20 6.18 20 5 20 4 19 4 17.82a2.18 2.18 0 0 1 2.18-2.18M4 4.44A15.56 15.56 0 0 1 19.56 20h-2.83A12.73 12.73 0 0 0 4 7.27V4.44m0 5.66a9.9 9.9 0 0 1 9.9 9.9h-2.83A7.07 7.07 0 0 0 4 12.93V10.1Z'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask-size: contain;
  mask-size: contain;
}

.theme-toggle-nav {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
  color: var(--text-secondary);
}
.theme-toggle-nav:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Hamburger to X animation */
.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-overlay {
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0; bottom: 0;
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.nav-overlay.active { opacity: 1; visibility: visible; }

.nav-overlay-links {
  list-style: none;
  padding: var(--space-xl);
}
.nav-overlay-links li a {
  display: block;
  padding: 14px 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

/* ===== 导航下拉菜单 ===== */

.nav-dropdown { position: relative; }

.nav-dropdown-trigger {
  display: block;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: default;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.nav-dropdown-trigger::after {
  content: " ▾";
  font-size: 0.7em;
  opacity: 0.6;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  list-style: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xs) 0;
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 200;
}
.nav-dropdown-menu li a {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease;
}
.nav-dropdown-menu li a:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ===== 移动端覆盖层子菜单 ===== */

.nav-overlay-links .overlay-section {
  padding: 10px 0 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: none;
}
.nav-overlay-links .overlay-sub a {
  padding-left: var(--space-lg);
  font-size: 16px;
  color: var(--text-secondary);
}
.nav-overlay-links .overlay-sub a:hover {
  color: var(--accent);
}

/* ===== 主内容区域 ===== */

.page-content {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-3xl);
  min-height: 100vh;
  position: relative;
  z-index: 1;
  animation: page-enter 0.5s ease-out;
}

@keyframes page-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.wrapper {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===== 首页英雄区域 ===== */

.hero {
  text-align: center;
  padding: var(--space-2xl) 0 var(--space-xl);
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, #5e5ce6, #8b5cf6, #ec4899, #5e5ce6);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 10s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== 首页文章列表 ===== */

.home-section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.home-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.home-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.home-list li:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.home-post-inner {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.home-thumb-link {
  flex-shrink: 0;
  width: 140px;
  height: 94px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-code);
}

.home-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}

/* ===== Placeholder thumbnails ===== */

.home-thumb-placeholder {
  position: relative;
  display: block;
  text-decoration: none;
  overflow: hidden;
  background-size: 120% 120%;
  animation: bg-drift 15s ease infinite;
}

@keyframes bg-drift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.home-thumb-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 14px 14px;
  pointer-events: none;
  z-index: 1;
}

/* Animated glow orb */
.home-thumb-placeholder::after {
  content: '';
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
  top: -30px;
  right: -30px;
  pointer-events: none;
  z-index: 1;
  animation: orb-drift 8s ease-in-out infinite;
}

@keyframes orb-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-15px, 15px) scale(1.15); }
  66% { transform: translate(-5px, 5px) scale(0.95); }
}

/* Per-category gradients (more refined palette) */
.home-thumb-placeholder[data-category="技术"] {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

.home-thumb-placeholder[data-category="生活"] {
  background: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
}

.home-thumb-placeholder[data-category="杂记"] {
  background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
}

.home-thumb-placeholder[data-category="影评"] {
  background: linear-gradient(135deg, #e11d48 0%, #f59e0b 100%);
}

.home-thumb-placeholder[data-category="其他"] {
  background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

/* Default fallback (no category) */
.home-thumb-placeholder:not([data-category]) {
  background: linear-gradient(135deg, var(--accent-light), var(--bg-code));
}

.home-post-body { flex: 1; min-width: 0; }

.home-list li a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  display: block;
  margin-bottom: var(--space-xs);
}
.home-list li a:hover { color: var(--accent); }

.home-post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.home-date {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.home-reading-time {
  color: var(--text-tertiary);
  font-size: 0.75rem;
}

.home-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: var(--space-xs);
}

.post-tag {
  display: inline-block;
  padding: 1px 7px;
  background: var(--bg-code);
  color: var(--text-tertiary);
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.post-tag:hover {
  color: var(--accent);
  background: var(--accent-light);
}

.post-category {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.home-excerpt {
  color: var(--text-tertiary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: var(--space-sm) 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.more-posts {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.more-posts:hover {
  background: var(--accent-light);
  gap: var(--space-sm);
}

/* ===== 文章卡片 ===== */

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
}

.post-header {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.post-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.post-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
}

.meta-separator { color: var(--text-tertiary); }
.post-categories { color: var(--accent); font-weight: 500; }

.copy-link-btn {
  display: inline;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.9rem;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color 0.2s ease;
}
.copy-link-btn:hover {
  color: var(--accent);
}
.copy-link-btn.copied {
  color: #34c759;
}

/* Post footer tags */
.post-footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

/* ===== 文章内容 ===== */

.post-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-primary);
}

/* ===== 文章目录（TOC） ===== */

.post-toc {
  background: var(--accent-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-xl);
  font-size: 0.9rem;
}

.toc-title {
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.toc-toggle {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: var(--space-sm) 0 0;
}
.toc-list li { margin: 0; }
.toc-list a {
  display: block;
  padding: 4px 0;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease;
}
.toc-list a:hover { color: var(--accent); }
.toc-list a.toc-active {
  color: var(--accent);
  font-weight: 600;
  border-bottom-color: var(--accent);
}
.toc-h3 a { padding-left: var(--space-lg); font-size: 0.85rem; }

.post-toc.toc-collapsed .toc-list { display: none; }

/* ===== 文章内容 ===== */

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 1.8em 0 0.6em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border-light);
}
.post-content h3 { font-size: 1.25rem; font-weight: 600; margin: 1.5em 0 0.5em; }
.post-content h4 { font-size: 1.1rem; font-weight: 600; margin: 1.2em 0 0.4em; }
.post-content p { margin: 1em 0; }

.post-content a {
  color: var(--accent);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 1px;
  padding-bottom: 2px;
  transition: color 0.25s ease, background-size 0.4s ease;
}
.post-content a:hover {
  color: var(--accent-hover);
  background-image: linear-gradient(var(--accent-hover), var(--accent-hover));
  background-size: 100% 1px;
}

/* External link indicator */
.post-content a[href^="http"]:not([href*="950922.xyz"]):not([href*="lccccc1024"])::after {
  content: ' ↗';
  font-size: 0.85em;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}
.post-content a[href^="http"]:not([href*="950922.xyz"]):not([href*="lccccc1024"]):hover::after {
  opacity: 1;
}

.post-content blockquote {
  margin: 1.5em 0;
  padding: var(--space-md) var(--space-lg);
  border-left: none;
  background: var(--accent-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  position: relative;
}
.post-content blockquote::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--accent), #8b5cf6);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.post-content blockquote p:first-child { margin-top: 0; }
.post-content blockquote p:last-child { margin-bottom: 0; }

.post-content ul, .post-content ol { margin: 1em 0; padding-left: 1.5em; }
.post-content li { margin: 0.4em 0; }

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 1.5em auto;
  display: block;
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.post-content img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.post-content hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2em 0;
}

/* ===== 代码块 ===== */

.post-content .highlight {
  position: relative;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  overflow: hidden;
}

.post-content .highlight pre {
  background: none;
  border: none;
  padding: var(--space-lg);
  padding-top: calc(var(--space-lg) + 14px);
  margin: 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Standalone pre (no .highlight wrapper) */
.post-content > pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: 1.5em 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* macOS-style top bar with traffic light dots */
.post-content .highlight::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 14px;
  width: 44px;
  height: 10px;
  background:
    radial-gradient(circle at 6px 5px, #ff5f57 10px, transparent 10px),
    radial-gradient(circle at 22px 5px, #ffbd2e 10px, transparent 10px),
    radial-gradient(circle at 38px 5px, #28c840 10px, transparent 10px);
  pointer-events: none;
  z-index: 2;
  opacity: 0.7;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}
.post-content pre code { background: none; padding: 0; color: var(--text-primary); }

/* ===== 文章导航 ===== */

.post-nav {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}
.post-nav-prev { margin-right: auto; flex: 1; }
.post-nav-next { margin-left: auto; flex: 1; text-align: right; }
.post-nav-prev:empty, .post-nav-next:empty { display: none; }

.post-nav a {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.3s ease;
  height: 100%;
}
.post-nav a:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-title {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 相关文章 ===== */

.related-posts {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}
.related-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}
.related-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.related-list li {
  background: var(--accent-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}
.related-list li:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.related-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  gap: var(--space-md);
}
.related-post-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}
.related-post-date {
  color: var(--text-tertiary);
  font-size: 0.8rem;
  flex-shrink: 0;
}
.related-list li:hover .related-post-title { color: var(--accent); }

/* ===== 语义标签样式 ===== */

::selection {
  background: var(--accent);
  color: #ffffff;
}

.post-content mark {
  background: var(--accent-light);
  color: var(--accent);
  padding: 0 4px;
  border-radius: 3px;
}

.post-content kbd {
  display: inline-block;
  padding: 2px 7px;
  font-size: 0.8em;
  font-family: var(--font-mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--border);
  color: var(--text-primary);
}

.post-content abbr {
  cursor: help;
  text-decoration: underline dotted var(--text-tertiary);
  text-underline-offset: 2px;
}

.post-content ul li,
.post-content ol li {
  margin: 0.4em 0;
  line-height: 1.7;
}

.post-content li::marker {
  color: var(--accent);
}

/* ===== Giscus 评论 ===== */

.comments-section {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

/* ===== 搜索高亮 ===== */

.search-highlight {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
  padding: 0 2px;
  border-radius: 3px;
}

/* ===== 归档页 ===== */

.archive-year {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-2xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.archive-list { list-style: none; }

.archive-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-sm);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}
.archive-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.archive-date {
  color: var(--text-secondary);
  font-size: 0.85rem;
  flex-shrink: 0;
  min-width: 50px;
}

.archive-item a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  flex: 1;
}
.archive-item a:hover { color: var(--accent); }

.archive-category {
  color: var(--text-tertiary);
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* ===== 关于页 ===== */

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.about-card h2 { margin-top: 0; margin-bottom: var(--space-md); font-size: 1.2rem; color: var(--accent); }
.about-card ul { padding-left: 1.2em; }
.about-card li { margin: 0.4em 0; }

/* ===== 社交按钮 ===== */

.social-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.25s ease;
}

.social-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.social-btn--github:hover {
  color: #24292e;
  border-color: #24292e;
  background: rgba(36,41,46,0.08);
  transform: translateY(-2px);
}

.social-btn--blog:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
}

.social-btn--email:hover {
  color: #ea4335;
  border-color: #ea4335;
  background: rgba(234,67,53,0.08);
  transform: translateY(-2px);
}

.social-btn span {
  font-size: 0.85rem;
}

.about-links { list-style: none; }
.about-links li { padding: var(--space-sm) 0; border-bottom: 1px solid var(--border-light); }
.about-links li:last-child { border-bottom: none; }
.about-links a { color: var(--accent); text-decoration: none; font-weight: 500; }
.about-links a:hover { text-decoration: underline; }

/* ===== 标签云 ===== */

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}
.tag-cloud a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-xs) var(--space-md);
  background: var(--accent-light);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 20px;
  transition: all 0.2s ease;
}

.tag-count {
  font-size: 0.75rem;
  opacity: 0.6;
}
.tag-cloud a:hover {
  background: var(--accent);
  color: #ffffff;
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--shadow-md);
}

/* ===== 404 页面 ===== */

.error-404 {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  font-size: 5rem;
  font-weight: 800;
  line-height: 1;
  margin: var(--space-xl) 0 var(--space-md);
  user-select: none;
}

.error-404-num {
  color: var(--accent);
  animation: error-bounce 2s ease-in-out infinite;
}

.error-404-zero {
  color: var(--text-tertiary);
  animation: error-spin 3s ease-in-out infinite;
  display: inline-block;
}

@keyframes error-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes error-spin {
  0%, 100% { transform: rotate(0deg) scale(1); }
  25% { transform: rotate(-10deg) scale(1.1); }
  75% { transform: rotate(10deg) scale(1.1); }
}

/* ===== 搜索框 ===== */

.search-box {
  margin-top: var(--space-2xl);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease;
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.search-inner {
  display: flex;
  align-items: center;
  background: var(--bg-card);
}

.search-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-left: var(--space-lg);
  background: var(--text-tertiary);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask-size: contain;
  mask-size: contain;
  transition: background 0.2s ease;
}

.search-box:focus-within .search-icon {
  background: var(--accent);
}

#search-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  border: none;
  font-size: 1rem;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-sans);
}
#search-input:focus { outline: none; }
#search-input::placeholder { color: var(--text-tertiary); }

#search-results {
  list-style: none;
  border-top: 1px solid var(--border);
}
#search-results li {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.2s ease;
}
#search-results li:hover { background: var(--accent-light); }
#search-results li a { color: var(--text-primary); text-decoration: none; font-weight: 500; }
#search-results li a:hover { color: var(--accent); }

/* ===== 列表页通用组件 ===== */

.stats {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.stats strong { color: var(--accent); }

.list-page-header {
  text-align: center;
  padding: var(--space-xl) 0;
}
.list-page-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.list-page-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  font-style: italic;
}
.list-page-content {
  max-width: var(--wide-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===== 表格 ===== */

.table-container { overflow-x: auto; margin-bottom: var(--space-xl); }

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

thead th {
  background: var(--bg-code);
  color: var(--text-primary);
  font-weight: 600;
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  user-select: none;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s ease;
  white-space: nowrap;
}
thead th:hover { background: var(--accent-light); color: var(--accent); }
th.sorted-asc::after { content: " ▲"; font-size: 0.7em; }
th.sorted-desc::after { content: " ▼"; font-size: 0.7em; }

tbody tr { transition: background 0.15s ease; }
tbody tr:nth-child(even) { background: var(--bg-code); }
tbody tr:hover { background: var(--accent-light); }

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.95rem;
}
tbody tr:last-child td { border-bottom: none; }

td a { color: var(--accent); text-decoration: none; font-weight: 500; }
td a:hover { text-decoration: underline; }
th:first-child, td:first-child { text-align: center; width: 60px; }

/* Genre / type badge in tables */
td .genre-badge {
  display: inline-block;
  padding: 2px 10px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}

/* Table row entrance */
.table-container tbody tr.row-enter {
  opacity: 0;
  transform: translateX(-8px);
  animation: row-slide-in 0.35s ease-out forwards;
}

@keyframes row-slide-in {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

.totals {
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-xl);
  line-height: 2;
  font-size: 1rem;
}

.strike td, .strike td * {
  color: var(--text-tertiary);
  text-decoration: line-through;
  opacity: 0.6;
}

.status-abandoned { color: var(--text-secondary); font-style: italic; }

/* ===== 返回顶部 ===== */

.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover {
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.back-to-top-ring {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

.ring-fill {
  color: var(--accent);
  transition: stroke-dashoffset 0.1s ease;
}

.back-to-top-arrow {
  position: relative;
  z-index: 1;
}

/* ===== 代码复制按钮 ===== */

.code-copy-btn {
  position: absolute;
  top: 8px; right: 8px;
  padding: 4px 10px;
  font-size: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, all 0.2s ease;
  z-index: 10;
  font-family: var(--font-sans);
  color: var(--text-secondary);
}
pre:hover .code-copy-btn, .highlight:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }
.code-copy-btn.copied { background: #34c759; color: white; border-color: #34c759; }

/* ===== 页脚 ===== */

.site-footer {
  padding: var(--space-lg) 0 var(--space-2xl);
  text-align: center;
}

.footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer-sep {
  opacity: 0.4;
}

.footer-powered {
  opacity: 0.6;
}

/* ===== 灯箱 ===== */

.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 10000;
  justify-content: center;
  align-items: center;
  cursor: zoom-out;
}
.lightbox-overlay.active { display: flex; }
.lightbox-overlay img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ===== 无障碍 ===== */

.skip-link {
  position: absolute;
  top: -40px; left: 0;
  padding: 8px 16px;
  background: var(--accent);
  color: #ffffff;
  z-index: 10001;
  text-decoration: none;
  font-size: 14px;
  transition: top 0.1s ease;
}
.skip-link:focus { top: 0; }

a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
:focus:not(:focus-visible) { outline: none; }

/* ===== 响应式 ===== */

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero-title { font-size: 2rem; }
  .post-card { padding: var(--space-lg); border-radius: var(--radius-md); }
  .post-title { font-size: 1.5rem; }
  .post-nav { flex-direction: column; }
  .post-nav-next { text-align: left; margin-left: 0; }

  .archive-item { flex-wrap: wrap; gap: var(--space-sm); padding: var(--space-md); }
  .archive-date { min-width: auto; }

  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
  .wrapper { padding: 0 var(--space-md); }
  .home-post-inner { flex-direction: column; gap: var(--space-sm); }
  .home-thumb-link { width: 100%; height: 160px; }

  .site-footer { margin-top: var(--space-lg); }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.6rem; }
  .post-card { padding: var(--space-md); border-radius: var(--radius-sm); }
  .post-title { font-size: 1.3rem; }
  .list-page-title { font-size: 1.6rem; }
}

@media (max-width: 768px) {
  table, thead, tbody, th, td, tr { display: block; }
  thead tr { position: absolute; top: -9999px; left: -9999px; }
  tr {
    margin-bottom: var(--space-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
  }
  td {
    position: relative;
    padding: 12px 14px 12px 90px !important;
    min-height: 44px;
    border: none;
    border-bottom: 1px solid var(--border-light);
    width: 100% !important;
    text-align: left !important;
  }
  td:last-child { border-bottom: none; }
  td:first-child { text-align: left !important; width: auto !important; }
  td::before {
    content: attr(data-label);
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 70px;
    font-weight: 600;
    color: var(--accent);
    font-size: 0.8rem;
  }
}

/* ===== 代码块语言标签 ===== */

.code-lang-label {
  position: absolute;
  top: 9px;
  right: 56px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  pointer-events: none;
  z-index: 2;
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== 图片模糊占位 ===== */

.post-content img.img-loading {
  filter: blur(15px);
  opacity: 0.5;
  transform: scale(1.05);
  transition: filter 0.6s ease, opacity 0.6s ease, transform 0.6s ease;
}

.post-content img.img-loaded {
  filter: blur(0);
  opacity: 1;
  transform: scale(1);
}

/* ===== 减弱动效 ===== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ===== 首页卡片交错入场 ===== */

.home-list li.card-enter {
  opacity: 0;
  transform: translateY(16px);
  animation: card-enter 0.5s ease-out forwards;
}

@keyframes card-enter {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}


/* ===== 暗色模式图片自适应 ===== */

html.dark .post-content img {
  opacity: 0.85;
  filter: brightness(0.9);
  transition: opacity 0.3s ease, filter 0.3s ease;
}

html.dark .post-content img:hover {
  opacity: 1;
  filter: brightness(1);
}

/* ===== 数字跳动动画 ===== */

@keyframes count-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.stats strong {
  display: inline-block;
  animation: count-up 0.5s ease-out both;
}

.stats strong:nth-child(1) { animation-delay: 0.1s; }
.stats strong:nth-child(2) { animation-delay: 0.2s; }

/* ===== 阅读进度百分比 ===== */

.read-progress-text {
  position: fixed;
  bottom: 80px;
  right: 32px;
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-tertiary);
  pointer-events: none;
  z-index: 49;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.read-progress-text.visible {
  opacity: 1;
}


/* Theme toggle icon container */
.theme-icon-nav {
  display: flex;
  align-items: center;
  justify-content: center;
}


/* ===== 文章时效提示 ===== */
.post-age-notice {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-lg);
  background: rgba(255, 189, 46, 0.12);
  border: 1px solid rgba(255, 189, 46, 0.3);
  border-radius: var(--radius-md);
  color: #b8860b;
  font-size: 0.85rem;
  line-height: 1.4;
}

html.dark .post-age-notice {
  background: rgba(255, 189, 46, 0.08);
  border-color: rgba(255, 189, 46, 0.2);
  color: #d4a843;
}

/* ===== 暗色模式切换动画 ===== */
html.dark-mode-transitioning,
html.dark-mode-transitioning *,
html.dark-mode-transitioning *::before,
html.dark-mode-transitioning *::after {
  transition: background-color 0.35s ease,
              color 0.35s ease,
              border-color 0.35s ease,
              box-shadow 0.35s ease !important;
}


/* ===== Cmd+K 命令面板 ===== */
.cmdk-overlay {
  position: fixed; inset: 0; z-index: 99999;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 12vh;
  opacity: 0; visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.cmdk-overlay.active { opacity: 1; visibility: visible; }

.cmdk-modal {
  width: 100%; max-width: 600px;
  background: var(--bg-nav);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 70px rgba(0,0,0,0.2);
  overflow: hidden;
  transform: translateY(-10px) scale(0.98);
  transition: transform 0.2s ease;
}
.cmdk-overlay.active .cmdk-modal {
  transform: translateY(0) scale(1);
}

.cmdk-input-wrap {
  display: flex; align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  gap: var(--space-sm);
}
.cmdk-search-icon { flex-shrink: 0; color: var(--text-tertiary); }
.cmdk-input {
  flex: 1; border: none; background: none;
  font-size: 1.05rem; color: var(--text-primary);
  font-family: var(--font-sans); outline: none;
}
.cmdk-esc-hint {
  font-size: 0.7rem; padding: 2px 6px;
  background: var(--bg-code); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.cmdk-results { max-height: 50vh; overflow-y: auto; padding: var(--space-xs) 0; }
.cmdk-results:not(.has-results) { display: none; }

.cmdk-result-item {
  display: block; padding: var(--space-sm) var(--space-lg);
  text-decoration: none; transition: background 0.1s;
}
.cmdk-result-item:hover,
.cmdk-result-item.selected { background: var(--accent-light); }
.cmdk-result-title {
  display: block; color: var(--text-primary); font-weight: 500;
  font-size: 0.95rem;
}
.cmdk-result-excerpt {
  display: block; color: var(--text-tertiary);
  font-size: 0.8rem; margin-top: 2px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cmdk-empty { padding: var(--space-xl); text-align: center; color: var(--text-tertiary); font-size: 0.9rem; }

.cmdk-footer {
  display: flex; gap: var(--space-lg); padding: var(--space-sm) var(--space-lg);
  border-top: 1px solid var(--border); font-size: 0.75rem;
  color: var(--text-tertiary);
}
.cmdk-key {
  display: inline-block; padding: 1px 5px; margin: 0 2px;
  background: var(--bg-code); border: 1px solid var(--border);
  border-radius: 3px; font-family: var(--font-mono);
  font-size: 0.7rem; min-width: 18px; text-align: center;
}


/* ===== 签名档 ===== */
.post-signature {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  font-style: italic;
  line-height: 1.6;
}
.post-signature-author {
  display: block;
  margin-top: var(--space-xs);
  font-size: 0.8rem;
  font-style: normal;
  opacity: 0.6;
}

/* ===== 系列导航 ===== */
.post-series {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--accent-light);
  border-radius: var(--radius-md);
}
.post-series-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--accent);
}
.post-series-list {
  list-style: none;
  padding: 0;
}
.post-series-list li {
  padding: var(--space-xs) 0;
  font-size: 0.9rem;
}
.post-series-list li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.post-series-list li a:hover {
  color: var(--accent);
}
.post-series-list li.series-current a {
  color: var(--accent);
  font-weight: 600;
}
.post-series-list li.series-current::before {
  content: '→ ';
  color: var(--accent);
  font-weight: 600;
}