@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ===== 基础变量 ===== */
:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-bg: #26171f;
  --c-bg-2: #1a0f16;
  --c-bg-3: #2e1a26;
  --c-surface: #321827;
  --c-surface-2: #3d1f2f;
  --c-text: #f0e0eb;
  --c-text-2: #c8a8bc;
  --c-text-3: #9a7090;
  --c-border: rgba(255,0,128,0.2);
  --c-border-2: rgba(255,0,255,0.15);
  --c-glow: rgba(255,0,128,0.4);
  --c-glow-2: rgba(255,0,255,0.3);

  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --nav-w: 240px;
  --radius-card: 18px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 24px rgba(255,0,128,0.12), 0 1px 4px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 32px rgba(255,0,128,0.2);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== Aurora 背景 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(255,0,128,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 80%, rgba(255,0,255,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 100% 50% at 50% 50%, rgba(38,23,31,0.8) 0%, var(--c-bg) 70%);
  animation: aurora-shift 18s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes aurora-shift {
  0%   { opacity: 1; filter: hue-rotate(0deg); }
  50%  { opacity: 0.85; filter: hue-rotate(15deg); }
  100% { opacity: 1; filter: hue-rotate(-10deg); }
}

/* ===== 链接 ===== */
a { color: var(--c-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-secondary); }
a:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 3px; border-radius: 3px; }

/* ===== 图片 ===== */
img { max-width: 100%; height: auto; display: block; }

/* ===== 布局 ===== */
.page-main {
  margin-left: var(--nav-w);
  min-height: 100vh;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 导航 Header ===== */
.site-header {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--nav-w);
  height: 100vh;
  background: linear-gradient(180deg, var(--c-bg-2) 0%, rgba(38,23,31,0.97) 100%);
  border-right: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  box-shadow: 0 0 20px var(--c-glow);
}

.header-brand {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--c-border);
  width: 100%;
}

.brand-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: 0.05em;
  line-height: 1.3;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sub {
  display: block;
  font-size: 0.72rem;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.main-nav {
  width: 100%;
  flex: 1;
}

.main-nav p {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.main-nav p a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--c-text-2);
  letter-spacing: 0.03em;
  transition: all var(--transition);
  border: 1px solid transparent;
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.3;
}

.main-nav p a:hover,
.main-nav p a.active {
  color: var(--c-primary);
  background: rgba(255,0,128,0.08);
  border-color: var(--c-border);
  box-shadow: inset 0 0 12px rgba(255,0,128,0.05);
}

.main-nav p a.active {
  font-weight: 600;
}

.header-contact {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  width: 100%;
  text-align: center;
}

.contact-hint {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--c-text-3);
  letter-spacing: 0.06em;
}

.contact-hint::before {
  content: '● ';
  color: var(--c-primary);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== 页脚 ===== */
.site-footer {
  margin-left: var(--nav-w);
  padding: 40px 32px;
  border-top: 1px solid var(--c-border);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  line-height: 1.2;
}

.site-footer small {
  display: block;
  font-size: 0.78rem;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.site-footer small a {
  color: var(--c-text-3);
}

.site-footer small a:hover {
  color: var(--c-primary);
}

/* ===== 通用容器 & 侧边栏 ===== */
.recent-layout,
.tag-articles-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.article-section,
.about-section,
.privacy-section {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
  padding: 40px 0;
}

/* ===== 侧边栏 ===== */
.sidebar {
  position: sticky;
  top: 32px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.sidebar h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}

.sidebar-nav a {
  display: block;
  padding: 9px 12px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--c-text-2);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.3;
}

.sidebar-nav a:hover {
  color: var(--c-primary);
  background: rgba(255,0,128,0.07);
  border-color: var(--c-border);
}

.sidebar-tip {
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}

.sidebar-tip p {
  font-size: 0.82rem;
  color: var(--c-text-3);
  line-height: 1.6;
  margin-bottom: 10px;
}

.sidebar-tip a {
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

/* ===== 首页 Hero ===== */
.hero-section {
  padding: 60px 0 40px;
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-text h1 {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-text);
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 60%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1rem;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 460px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  transition: all var(--transition);
  min-height: 44px;
  box-shadow: 0 4px 20px var(--c-glow);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--c-glow);
  filter: brightness(1.1);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  background: transparent;
  color: var(--c-primary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-primary);
  letter-spacing: 0.05em;
  transition: all var(--transition);
  min-height: 44px;
}

.btn-secondary:hover {
  background: rgba(255,0,128,0.1);
  color: var(--c-secondary);
  border-color: var(--c-secondary);
}

.hero-deco {
  position: relative;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.deco-bg-text {
  font-family: var(--font-mono);
  font-size: 7rem;
  font-weight: 700;
  color: rgba(255,0,128,0.06);
  letter-spacing: 0.2em;
  user-select: none;
  position: absolute;
  white-space: nowrap;
}

.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.45;
  animation: blob-float 8s ease-in-out infinite alternate;
}

.blob-1 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--c-primary), transparent);
  top: 20%; left: 20%;
  animation-delay: 0s;
}

.blob-2 {
  width: 150px; height: 150px;
  background: radial-gradient(circle, var(--c-secondary), transparent);
  top: 50%; right: 20%;
  animation-delay: 2s;
}

.blob-3 {
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(255,80,200,0.8), transparent);
  bottom: 10%; left: 40%;
  animation-delay: 4s;
}

@keyframes blob-float {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(20px, -15px) scale(1.08); }
  66%  { transform: translate(-10px, 10px) scale(0.95); }
  100% { transform: translate(15px, -5px) scale(1.05); }
}

/* ===== 内容区公共 ===== */
.content-section,
.topic-content-section,
.tag-content-section {
  padding: 32px 0;
}

/* ===== 段落、标题、Prose ===== */
.prose {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-text);
  max-width: 780px;
}

.prose h2 {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--c-text);
  margin: 2em 0 0.75em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--c-border);
}

.prose h3 {
  font-family: var(--font-mono);
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--c-text);
  margin: 1.6em 0 0.6em;
}

.prose p { margin-bottom: 1.2em; }

.prose ul, .prose ol {
  padding-left: 1.4em;
  margin-bottom: 1.2em;
}

.prose li { margin-bottom: 0.4em; }

.prose strong { color: var(--c-primary); font-weight: 600; }

.prose a {
  color: var(--c-primary);
  border-bottom: 1px solid rgba(255,0,128,0.3);
}

.prose a:hover {
  color: var(--c-secondary);
  border-bottom-color: var(--c-secondary);
}

.prose blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(255,0,128,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--c-text-2);
}

/* ===== 章节标题 h2 通用 ===== */
h2 {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--c-text);
}

h2 span {
  display: inline-block;
  position: relative;
}

h2 span::after {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
  border-radius: 2px;
  margin-top: 6px;
  box-shadow: 0 0 10px var(--c-glow);
}

/* ===== 首页话题卡片 ===== */
.topics-section {
  padding: 48px 0;
  border-top: 1px solid var(--c-border);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.topic-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,0,128,0.04) 0%, rgba(255,0,255,0.02) 100%);
  pointer-events: none;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  border-color: rgba(255,0,128,0.4);
}

.card-accent {
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  box-shadow: 0 0 12px var(--c-glow);
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--c-text);
}

.card-body h3 span {
  display: inline;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--c-text-2);
  line-height: 1.6;
  margin-bottom: 14px;
}

.card-count {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-primary);
  background: rgba(255,0,128,0.1);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.card-link {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.05em;
}

.card-link:hover { color: var(--c-secondary); }

/* ===== 最新收录列表 ===== */
.recent-section {
  padding: 48px 0;
  border-top: 1px solid var(--c-border);
}

.list-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--c-border);
}

.list-item:last-child { border-bottom: none; }

.list-meta {
  margin-bottom: 6px;
}

.list-meta time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-text-3);
  letter-spacing: 0.06em;
}

.list-item h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.list-item h3 span { display: inline; }

.list-item h3 a {
  color: var(--c-text);
}

.list-item h3 a:hover { color: var(--c-primary); }

.list-item p {
  font-size: 0.85rem;
  color: var(--c-text-2);
  line-height: 1.6;
}

/* ===== 话题页 Hero ===== */
.topic-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}

.topic-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,0,128,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.topic-hero-inner {
  max-width: 760px;
}

.topic-eyebrow,
.tag-eyebrow,
.about-eyebrow,
.privacy-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.topic-hero h1,
.tag-hero-inner h1,
.about-header h1,
.privacy-header h1 {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-text);
  margin-bottom: 14px;
}

.topic-desc {
  font-size: 1rem;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 600px;
}

.topic-stats {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-text-3);
}

.topic-stats strong {
  color: var(--c-primary);
  font-size: 1.1em;
}

/* ===== 子页列表 ===== */
.children-section {
  padding: 40px 0;
}

.child-card {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 24px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.child-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}

.child-card:hover::after { transform: scaleX(1); }

.child-card:hover {
  border-color: rgba(255,0,128,0.35);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
}

.child-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: rgba(255,0,128,0.2);
  line-height: 1;
  padding-top: 4px;
  letter-spacing: -0.02em;
}

.child-body h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.child-body h3 span { display: inline; }

.child-body h3 a {
  color: var(--c-text);
}

.child-body h3 a:hover { color: var(--c-primary); }

.child-body p {
  font-size: 0.85rem;
  color: var(--c-text-2);
  line-height: 1.6;
  margin-bottom: 10px;
}

.child-footer {
  display: flex;
  align-items: center;
  gap: 16px;
}

.child-footer time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-text-3);
}

.read-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-primary);
}

.read-link:hover { color: var(--c-secondary); }

/* ===== 话题侧边栏 ===== */
.topic-sidebar {
  margin-top: 40px;
}

/* ===== 文章页 ===== */
.article-main {
  min-width: 0;
  padding: 40px 0;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-text-3);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.breadcrumb a { color: var(--c-text-3); }
.breadcrumb a:hover { color: var(--c-primary); }

.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--c-border);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.art-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-text-3);
  letter-spacing: 0.06em;
}

.art-updated {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-text-3);
}

.tag-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-primary);
  background: rgba(255,0,128,0.1);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(255,0,128,0.2);
}

.tag-link:hover { background: rgba(255,0,128,0.18); }

.article-header h1 {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-text);
  margin-bottom: 12px;
}

.article-lead {
  font-size: 1rem;
  color: var(--c-text-2);
  line-height: 1.7;
}

.article-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--c-border);
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-2);
}

.back-link:hover { color: var(--c-primary); }

.related-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.related-link {
  display: block;
  padding: 10px 14px;
  background: var(--c-bg-3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  min-height: 40px;
}

.related-link:hover {
  border-color: rgba(255,0,128,0.35);
  background: rgba(255,0,128,0.06);
}

.related-title {
  display: block;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--c-text-2);
  line-height: 1.4;
  margin-bottom: 3px;
}

.related-link time {
  font-size: 0.72rem;
  color: var(--c-text-3);
  font-family: var(--font-mono);
}

/* ===== 标签页 ===== */
.tag-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--c-border);
}

.tag-hero-inner {
  max-width: 720px;
}

.tag-hero-inner p {
  color: var(--c-text-2);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.tag-chips-small {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-text-2);
  transition: all var(--transition);
  min-height: 36px;
}

.tag-chip:hover,
.tag-chip-home:hover {
  background: rgba(255,0,128,0.1);
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.tag-articles-section {
  padding: 48px 0;
  border-top: 1px solid var(--c-border);
}

.tag-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-border);
  align-items: start;
}

.tag-item:last-child { border-bottom: none; }

.tag-item-num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: rgba(255,0,128,0.2);
  padding-top: 3px;
}

.tag-item-body h3 {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.tag-item-body h3 span { display: inline; }

.tag-item-body h3 a { color: var(--c-text); }
.tag-item-body h3 a:hover { color: var(--c-primary); }

.tag-item-body p {
  font-size: 0.84rem;
  color: var(--c-text-2);
  line-height: 1.6;
  margin-bottom: 6px;
}

.tag-item-body time {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--c-text-3);
}

/* ===== 关于、隐私页 ===== */
.about-header,
.privacy-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--c-border);
}

.about-lead,
.privacy-lead {
  font-size: 1rem;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-top: 12px;
}

.privacy-date {
  margin-top: 12px;
}

.privacy-date time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-text-3);
  letter-spacing: 0.06em;
}

/* ===== Scroll Reveal ===== */
.reveal,
.reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible,
.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-item:nth-child(2) { transition-delay: 0.08s; }
.reveal-item:nth-child(3) { transition-delay: 0.16s; }
.reveal-item:nth-child(4) { transition-delay: 0.24s; }
.reveal-item:nth-child(5) { transition-delay: 0.32s; }
.reveal-item:nth-child(6) { transition-delay: 0.40s; }

/* ===== iridescent prismatic card shimmer ===== */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.topic-card:hover .card-accent,
.child-card:hover::after {
  animation: shimmer 2s linear infinite;
  background-size: 200% auto;
  background-image: linear-gradient(90deg, var(--c-primary), var(--c-secondary), #ff80ff, var(--c-primary));
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root { --nav-w: 200px; }
  .wrap { padding: 0 24px; }
  .recent-layout,
  .tag-articles-layout {
    grid-template-columns: 1fr 260px;
  }
  .article-section,
  .about-section,
  .privacy-section {
    grid-template-columns: 1fr 240px;
  }
}

@media (max-width: 768px) {
  :root { --nav-w: 0px; }

  .site-header {
    position: static;
    width: 100%;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 16px 20px;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    gap: 12px;
  }

  .header-brand {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    text-align: left;
    flex: 1;
  }

  .brand-name { font-size: 0.92rem; }
  .brand-sub { display: none; }

  .main-nav {
    width: 100%;
    order: 3;
  }

  .main-nav p {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
  }

  .main-nav p a {
    font-size: 0.75rem;
    padding: 8px 10px;
    min-height: 40px;
  }

  .header-contact {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    order: 2;
  }

  .page-main {
    margin-left: 0;
  }

  .site-footer {
    margin-left: 0;
  }

  .wrap { padding: 0 16px; }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-deco { height: 200px; }
  .deco-bg-text { font-size: 4rem; }
  .hero-text h1 { font-size: 1.7rem; }

  .recent-layout,
  .tag-articles-layout,
  .article-section,
  .about-section,
  .privacy-section {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    margin-top: 32px;
  }

  .topic-hero h1,
  .tag-hero-inner h1,
  .about-header h1,
  .privacy-header h1,
  .article-header h1 {
    font-size: 1.5rem;
  }

  .footer-brand { font-size: 1.8rem; }

  .child-card { grid-template-columns: 36px 1fr; gap: 12px; }
  .child-num { font-size: 1.2rem; }

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

@media (max-width: 480px) {
  .hero-text h1 { font-size: 1.4rem; }
  .hero-cta { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .article-header h1 { font-size: 1.3rem; }
  .footer-brand { font-size: 1.4rem; letter-spacing: 0.05em; }
}

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-item {
    opacity: 1;
    transform: none;
  }
}