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

/* ===== 设计令牌 ===== */
:root {
  --clr-primary: #87ff71;
  --clr-secondary: #01cdfe;
  --clr-dark: #192617;
  --clr-bg: #0a100a;
  --clr-bg2: #101910;
  --clr-surface: #162314;
  --clr-surface2: #1e2e1a;
  --clr-border: rgba(135,255,113,0.18);
  --clr-text: #d4f5c8;
  --clr-text-dim: #7aaa6a;
  --clr-accent: #ff71ce;
  --clr-accent2: #b967ff;
  --font-code: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-body: 'Fira Sans', 'Fira Code', system-ui, sans-serif;
  --radius-card: 28px;
  --glow-green: 0 0 12px rgba(135,255,113,0.55), 0 0 32px rgba(135,255,113,0.22);
  --glow-cyan: 0 0 12px rgba(1,205,254,0.55), 0 0 32px rgba(1,205,254,0.22);
  --glow-pink: 0 0 12px rgba(255,113,206,0.55), 0 0 32px rgba(255,113,206,0.22);
  --transition-base: 0.25s ease;
  --max-prose: 72ch;
  --max-layout: 1200px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--clr-secondary); text-decoration: none; transition: color var(--transition-base), text-shadow var(--transition-base); }
a:hover { color: var(--clr-primary); text-shadow: var(--glow-green); }
ul, ol { list-style: none; }
h1,h2,h3,h4 { font-family: var(--font-code); line-height: 1.2; }

/* ===== 扫描线装饰 ===== */
.scanlines {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.07) 3px,
    rgba(0,0,0,0.07) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ===== 眉题标签 ===== */
.eyebrow-label {
  display: inline-block;
  font-family: var(--font-code);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 0.5rem;
  padding: 2px 10px;
  border: 1px solid var(--clr-accent);
  border-radius: 4px;
}
small.eyebrow-label + h2,
small.eyebrow-label + h3 { margin-top: 0.4rem; }

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(10,16,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 2rem;
  border-bottom: 1px solid rgba(135,255,113,0.08);
}
.brand-link { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand-text {
  font-family: var(--font-code);
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  letter-spacing: 0.04em;
}
.brand-logo { height: 36px; width: auto; }
.brand-tagline {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  flex: 1;
}
.header-contact {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--clr-secondary);
  border: 1px solid var(--clr-secondary);
  padding: 6px 14px;
  border-radius: 6px;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}
.header-contact:hover {
  background: rgba(1,205,254,0.12);
  box-shadow: var(--glow-cyan);
  color: var(--clr-secondary);
  text-shadow: none;
}

.main-nav { padding: 0 2rem; }
.nav-list {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}
.nav-item > a,
.nav-item > details > summary {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--clr-text);
  min-height: 44px;
  cursor: pointer;
  transition: color var(--transition-base), background var(--transition-base);
  list-style: none;
  border-bottom: 2px solid transparent;
}
.nav-item > a:hover,
.nav-item > details > summary:hover,
.nav-item > details[open] > summary {
  color: var(--clr-primary);
  border-bottom-color: var(--clr-primary);
  background: rgba(135,255,113,0.05);
  text-shadow: none;
}
.nav-item > details > summary a {
  color: inherit;
  text-shadow: none;
}
.nav-item > details > summary a:hover { color: inherit; text-shadow: none; }

details > summary { list-style: none; }
details > summary::-webkit-details-marker { display: none; }
details > summary::after {
  content: '▾';
  margin-left: 6px;
  font-size: 0.75em;
  color: var(--clr-text-dim);
}
details[open] > summary::after { content: '▴'; }

.nav-item details menu,
.nav-item details ul {
  position: absolute;
  background: var(--clr-surface2);
  border: 1px solid var(--clr-border);
  border-radius: 12px;
  padding: 0.5rem 0;
  min-width: 220px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5), var(--glow-green);
  z-index: 300;
  animation: dropIn 0.18s ease;
}
@keyframes dropIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.nav-item details menu li a,
.nav-item details ul li a {
  display: block;
  padding: 0.55rem 1.2rem;
  font-size: 0.83rem;
  color: var(--clr-text);
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: background var(--transition-base), color var(--transition-base);
}
.nav-item details menu li a:hover,
.nav-item details ul li a:hover {
  background: rgba(135,255,113,0.1);
  color: var(--clr-primary);
  text-shadow: none;
}
.nav-item { position: relative; }

/* ===== 通用按钮 ===== */
.btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-code);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.7rem 1.8rem;
  min-height: 44px;
  border: 2px solid var(--clr-primary);
  border-radius: 8px;
  color: var(--clr-primary);
  background: transparent;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: background var(--transition-base), box-shadow var(--transition-base), transform 0.15s ease;
  text-decoration: none;
}
.btn-neon:hover {
  background: rgba(135,255,113,0.12);
  box-shadow: var(--glow-green);
  transform: translateY(-2px);
  color: var(--clr-primary);
  text-shadow: none;
}
.btn-sm { padding: 0.45rem 1rem; font-size: 0.82rem; min-height: 40px; }

.link-neon {
  color: var(--clr-secondary);
  font-family: var(--font-code);
  font-size: 0.85rem;
  border-bottom: 1px dashed rgba(1,205,254,0.4);
  padding-bottom: 1px;
}
.link-neon:hover { color: var(--clr-primary); border-bottom-color: var(--clr-primary); }

/* ===== 霓虹卡片 ===== */
.neon-card {
  background: var(--clr-surface);
  border-radius: var(--radius-card);
  padding: 1.6rem 1.8rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: 1px solid var(--clr-border);
  position: relative;
  overflow: hidden;
}
.neon-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(135,255,113,0.04), rgba(1,205,254,0.04));
  pointer-events: none;
}
.neon-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow-green), 0 16px 48px rgba(0,0,0,0.4);
}
.neon-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--clr-primary);
}
.neon-card p {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  line-height: 1.6;
}
.neon-card time {
  display: block;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--clr-accent);
  margin-bottom: 0.4rem;
}
.card-count {
  display: inline-block;
  margin-top: 0.8rem;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--clr-secondary);
  border: 1px solid rgba(1,205,254,0.3);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ===== 网格图案 ===== */
.grid-pattern {
  width: 100%;
  height: 120px;
  background:
    linear-gradient(rgba(135,255,113,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(135,255,113,0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  border-radius: 8px;
  transform: perspective(300px) rotateX(20deg);
  transform-origin: top center;
  opacity: 0.6;
}
.neon-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-primary), var(--clr-secondary), transparent);
  border-radius: 2px;
  margin-bottom: 1rem;
  box-shadow: var(--glow-green);
}
.prose-deco { margin-bottom: 0.5rem; }

/* ===== Hero — 首页 ===== */
.hero-section {
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 4rem 2rem 3rem;
  position: relative;
  background:
    radial-gradient(ellipse 80% 60% at 30% 0%, rgba(135,255,113,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(1,205,254,0.07) 0%, transparent 60%),
    var(--clr-bg);
}
.hero-aside {
  position: absolute;
  top: 2.5rem;
  left: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.hero-eyebrow {
  font-family: var(--font-code);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--clr-accent);
  text-transform: uppercase;
}
.hero-sub {
  font-size: 0.85rem;
  color: var(--clr-text-dim);
}
.hero-content {
  text-align: right;
  max-width: 680px;
}
.hero-title {
  font-family: var(--font-code);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--clr-primary);
  text-shadow: var(--glow-green), 0 0 80px rgba(135,255,113,0.3);
  margin-bottom: 1.2rem;
  letter-spacing: -0.01em;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--clr-text-dim);
  max-width: 48ch;
  margin-left: auto;
  margin-bottom: 2rem;
  text-align: right;
}

/* ===== 通用分区 ===== */
.content-section {
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 3.5rem 2rem;
}
.content-section h2 {
  font-family: var(--font-code);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
  margin-bottom: 2rem;
}
.section-body {
  position: relative;
}
.section-deco {
  margin-bottom: 1.5rem;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  gap: 1.5rem;
}
.topic-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.article-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ===== 侧边栏布局 ===== */
.section-aside,
.inner-aside,
.article-aside,
.topic-aside,
.tag-aside,
.about-aside,
.privacy-aside {
  background: var(--clr-surface2);
  border-radius: 16px;
  padding: 1.4rem 1.2rem;
  border-left: 3px solid var(--clr-secondary);
  box-shadow: var(--glow-cyan);
}
.aside-title {
  font-family: var(--font-code);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--clr-secondary);
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}
.aside-links li { margin-bottom: 0.4rem; }
.aside-links a {
  font-size: 0.88rem;
  color: var(--clr-text-dim);
  display: block;
  padding: 3px 0;
  transition: color var(--transition-base);
}
.aside-links a:hover { color: var(--clr-primary); text-shadow: none; }
.aside-parent {
  display: block;
  margin-bottom: 0.8rem;
  font-size: 0.88rem;
}

/* ===== 正文排版 ===== */
.prose-wrap {
  display: flex;
  flex-direction: column;
}
.prose-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--clr-text);
  max-width: var(--max-prose);
}
.prose-body h2 { font-size: 1.3rem; color: var(--clr-secondary); margin: 2rem 0 0.8rem; }
.prose-body h3 { font-size: 1.1rem; color: var(--clr-primary); margin: 1.6rem 0 0.6rem; }
.prose-body p { margin-bottom: 1.1rem; }
.prose-body ul, .prose-body ol { padding-left: 1.4rem; margin-bottom: 1rem; }
.prose-body li { margin-bottom: 0.4rem; list-style: disc; }
.prose-body ol li { list-style: decimal; }
.prose-body a { color: var(--clr-secondary); text-decoration: underline; text-decoration-color: rgba(1,205,254,0.35); }
.prose-body a:hover { color: var(--clr-primary); }
.prose-body strong { color: var(--clr-primary); font-weight: 600; }
.prose-body code {
  font-family: var(--font-code);
  font-size: 0.88em;
  background: var(--clr-surface2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--clr-secondary);
}
.prose-body blockquote {
  border-left: 3px solid var(--clr-primary);
  padding-left: 1rem;
  margin: 1.2rem 0;
  color: var(--clr-text-dim);
  font-style: italic;
}

/* ===== 文章 meta ===== */
.article-meta, .article-meta-row {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.article-meta time,
.article-meta-row time {
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--clr-accent);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--clr-text-dim);
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--clr-text-dim); }
.breadcrumb a:hover { color: var(--clr-primary); }
.breadcrumb span[aria-hidden] { color: var(--clr-text-dim); }

/* ===== 首页 sections ===== */
.topics-section {
  background: var(--clr-bg2);
  max-width: 100%;
  padding: 3.5rem 2rem;
}
.topics-section > * { max-width: var(--max-layout); margin-left: auto; margin-right: auto; }
.topics-section h2 { max-width: var(--max-layout); }

.articles-section { position: relative; }
.articles-section .section-aside {
  margin-bottom: 2rem;
  max-width: 480px;
}

.main-content-section {
  background: var(--clr-bg2);
  max-width: 100%;
  padding: 3.5rem 2rem;
}
.main-content-section > * { max-width: var(--max-layout); margin-left: auto; margin-right: auto; }

/* ===== Topic 页 ===== */
.topic-hero-section {
  min-height: 42vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 3rem 2rem 2.5rem;
  position: relative;
  background:
    radial-gradient(ellipse 70% 50% at 20% 0%, rgba(1,205,254,0.08) 0%, transparent 60%),
    var(--clr-bg);
  max-width: 100%;
}
.topic-hero-aside {
  position: absolute;
  top: 2rem;
  left: 2rem;
}
.topic-count {
  font-family: var(--font-code);
  font-size: 2rem;
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
}
.topic-hero-content { text-align: right; max-width: 600px; }
.topic-title {
  font-family: var(--font-code);
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 0.8rem;
}
.topic-desc { font-size: 1rem; color: var(--clr-text-dim); max-width: 44ch; margin-left: auto; }

.topic-content-section { max-width: var(--max-layout); margin: 0 auto; padding: 3rem 2rem; }
.topic-content-section h2 {
  font-family: var(--font-code);
  font-size: 1.5rem;
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
  margin-bottom: 2rem;
}
.topic-body {
  display: grid;
  grid-template-columns: 1fr 220px;
  grid-template-rows: auto auto;
  gap: 2rem;
}
.topic-body > .section-deco { grid-column: 1 / -1; }
.topic-body > .child-list { grid-column: 1; }
.topic-body > .topic-aside { grid-column: 2; grid-row: 2; align-self: start; }

.child-list {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.child-article-card { padding: 1.2rem 1.4rem; }
.child-thumb { border-radius: 12px; margin-bottom: 0.8rem; width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.child-card-body h3 { font-size: 0.95rem; }

.topic-prose-section { max-width: var(--max-layout); margin: 0 auto; padding: 2rem 2rem 3.5rem; }
.topic-prose-section h2 {
  font-family: var(--font-code);
  font-size: 1.3rem;
  color: var(--clr-secondary);
  margin-bottom: 1.5rem;
}

/* ===== Article 页 ===== */
.article-hero-section {
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 2.5rem 2rem 1.5rem;
}
.article-title {
  font-family: var(--font-code);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 1rem;
}
.article-hero-figure { margin-top: 1.5rem; border-radius: 16px; overflow: hidden; }
.article-hero-img { width: 100%; max-height: 400px; object-fit: cover; }

.article-body-section {
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2.5rem;
  align-items: start;
}
.article-aside { grid-column: 2; position: sticky; top: 100px; }
.article-body-section .prose-wrap { grid-column: 1; }
.article-prose { max-width: 68ch; }

/* ===== About 页 ===== */
.about-hero-section {
  min-height: 38vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 3rem 2rem 2.5rem;
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 10% 0%, rgba(185,103,255,0.08) 0%, transparent 60%),
    var(--clr-bg);
}
.about-hero-aside { position: absolute; top: 2rem; left: 2rem; }
.about-hero-content { text-align: right; max-width: 600px; }
.about-title {
  font-family: var(--font-code);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 0.8rem;
}
.about-subtitle { font-size: 1rem; color: var(--clr-text-dim); max-width: 44ch; margin-left: auto; }

.about-content-section { max-width: var(--max-layout); margin: 0 auto; padding: 3rem 2rem 4rem; }
.about-content-section h2 {
  font-family: var(--font-code);
  font-size: 1.5rem;
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
  margin-bottom: 2rem;
}
.about-body {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2.5rem;
  align-items: start;
}
.about-body > .prose-deco { grid-column: 1 / -1; }
.about-body > .about-aside { grid-column: 2; grid-row: 2; position: sticky; top: 100px; }
.about-body > .prose-body { grid-column: 1; grid-row: 2; }

/* ===== Privacy 页 ===== */
.privacy-hero-section {
  min-height: 32vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 3rem 2rem 2rem;
  position: relative;
  background:
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(1,205,254,0.06) 0%, transparent 60%),
    var(--clr-bg);
}
.privacy-hero-aside { position: absolute; top: 2rem; left: 2rem; }
.privacy-hero-aside time {
  font-family: var(--font-code);
  font-size: 0.78rem;
  color: var(--clr-text-dim);
  display: block;
  margin-top: 0.4rem;
}
.privacy-hero-content { text-align: right; max-width: 600px; }
.privacy-title {
  font-family: var(--font-code);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 0.8rem;
}
.privacy-subtitle { font-size: 1rem; color: var(--clr-text-dim); max-width: 44ch; margin-left: auto; }

.privacy-content-section { max-width: var(--max-layout); margin: 0 auto; padding: 3rem 2rem 4rem; }
.privacy-content-section h2 {
  font-family: var(--font-code);
  font-size: 1.5rem;
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
  margin-bottom: 2rem;
}
.privacy-body {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2.5rem;
  align-items: start;
}
.privacy-body > .prose-deco { grid-column: 1 / -1; }
.privacy-body > .privacy-aside { grid-column: 2; grid-row: 2; position: sticky; top: 100px; }
.privacy-body > .prose-body { grid-column: 1; grid-row: 2; }

/* ===== Inner (default) 页 ===== */
.inner-section { max-width: var(--max-layout); margin: 0 auto; padding: 3rem 2rem 4rem; }
.inner-section h1 {
  font-family: var(--font-code);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 1rem;
}
.inner-body {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2.5rem;
  align-items: start;
}
.inner-body > .prose-deco { grid-column: 1 / -1; }
.inner-body > .inner-aside { grid-column: 2; grid-row: 2; position: sticky; top: 100px; }
.inner-body > .prose-body { grid-column: 1; grid-row: 2; }

/* ===== Tag 页 ===== */
.tag-hero-section {
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
  position: relative;
}
.tag-title {
  font-family: var(--font-code);
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--clr-primary);
  text-shadow: var(--glow-green);
  margin-bottom: 0.8rem;
}
.tag-desc { font-size: 1rem; color: var(--clr-text-dim); margin-bottom: 1rem; }
.tag-hero-aside {
  display: inline-block;
  font-family: var(--font-code);
  font-size: 0.88rem;
  color: var(--clr-secondary);
  padding: 4px 14px;
  border: 1px solid rgba(1,205,254,0.4);
  border-radius: 6px;
  margin-top: 0.5rem;
}

.tag-list-section { max-width: var(--max-layout); margin: 0 auto; padding: 2rem 2rem 3rem; }
.tag-list-section h2 {
  font-family: var(--font-code);
  font-size: 1.4rem;
  color: var(--clr-secondary);
  text-shadow: var(--glow-cyan);
  margin-bottom: 2rem;
}
.tag-body {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2rem;
  align-items: start;
}
.tag-body > .prose-deco { grid-column: 1 / -1; }
.tag-body > .tag-article-list { grid-column: 1; }
.tag-body > .tag-aside { grid-column: 2; grid-row: 2; position: sticky; top: 100px; }

.tag-article-list {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.tag-article-card h3 { font-size: 0.95rem; }
.no-items .neon-card { opacity: 0.6; }

.tag-prose-section { max-width: var(--max-layout); margin: 0 auto; padding: 1.5rem 2rem 3.5rem; }
.tag-prose-section h2 {
  font-family: var(--font-code);
  font-size: 1.3rem;
  color: var(--clr-secondary);
  margin-bottom: 1.5rem;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  margin-top: 4rem;
}
.footer-form-block {
  background: linear-gradient(135deg, rgba(135,255,113,0.05), rgba(1,205,254,0.05));
  padding: 2.5rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--clr-border);
}
.footer-form-title {
  font-family: var(--font-code);
  font-size: 1.1rem;
  color: var(--clr-primary);
  margin-bottom: 1.2rem;
}
.subscribe-form {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}
.subscribe-form input[type="email"] {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  color: var(--clr-text);
  font-family: var(--font-code);
  font-size: 0.88rem;
  padding: 0.6rem 1rem;
  min-width: 240px;
  min-height: 42px;
  outline: none;
  transition: border-color var(--transition-base);
}
.subscribe-form input[type="email"]:focus {
  border-color: var(--clr-primary);
  box-shadow: var(--glow-green);
}
.subscribe-form input::placeholder { color: var(--clr-text-dim); }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 2.5rem 2rem;
}
.footer-dl dt {
  font-family: var(--font-code);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--clr-primary);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--clr-border);
}
.footer-dl dd {
  font-size: 0.88rem;
  color: var(--clr-text-dim);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}
.footer-dl dd a {
  color: var(--clr-text-dim);
  transition: color var(--transition-base);
}
.footer-dl dd a:hover { color: var(--clr-primary); text-shadow: none; }

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding: 1.5rem 2rem;
  text-align: center;
}
.footer-bottom p {
  font-family: var(--font-code);
  font-size: 0.78rem;
  color: var(--clr-text-dim);
  margin-bottom: 0.3rem;
}
.footer-note { font-size: 0.72rem !important; opacity: 0.7; }

/* ===== 动效 ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes glitch {
  0% { text-shadow: var(--glow-green); }
  20% { text-shadow: 3px 0 var(--clr-accent), -3px 0 var(--clr-secondary); }
  40% { text-shadow: var(--glow-green); }
  60% { text-shadow: -2px 0 var(--clr-accent2), 2px 0 var(--clr-primary); }
  80% { text-shadow: var(--glow-green); }
  100% { text-shadow: var(--glow-green); }
}

.neon-card {
  animation: fadeUp 0.4s ease both;
}
.card-grid li:nth-child(1) .neon-card { animation-delay: 0.05s; }
.card-grid li:nth-child(2) .neon-card { animation-delay: 0.10s; }
.card-grid li:nth-child(3) .neon-card { animation-delay: 0.15s; }
.card-grid li:nth-child(4) .neon-card { animation-delay: 0.20s; }
.card-grid li:nth-child(5) .neon-card { animation-delay: 0.25s; }
.card-grid li:nth-child(6) .neon-card { animation-delay: 0.30s; }

.hero-title {
  animation: glitch 6s infinite;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .topic-body,
  .article-body-section,
  .about-body,
  .privacy-body,
  .inner-body,
  .tag-body {
    grid-template-columns: 1fr;
  }
  .topic-body > .topic-aside,
  .article-aside,
  .about-body > .about-aside,
  .privacy-body > .privacy-aside,
  .inner-body > .inner-aside,
  .tag-body > .tag-aside {
    grid-column: 1;
    position: static;
  }
  .topic-body > .child-list,
  .article-body-section .prose-wrap,
  .about-body > .prose-body,
  .privacy-body > .prose-body,
  .inner-body > .prose-body,
  .tag-body > .tag-article-list {
    grid-column: 1;
  }
  .footer-cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .brand-row { padding: 0.6rem 1rem; gap: 0.8rem; }
  .brand-tagline { display: none; }
  .main-nav { padding: 0 1rem; }
  .nav-item > a,
  .nav-item > details > summary { padding: 0.65rem 0.6rem; font-size: 0.78rem; }

  .hero-section { padding: 6rem 1rem 2.5rem; min-height: 70vh; align-items: flex-start; flex-direction: column; justify-content: flex-end; }
  .hero-aside { position: static; margin-bottom: 1rem; }
  .hero-content { text-align: left; max-width: 100%; }
  .hero-desc { text-align: left; margin-left: 0; }

  .topic-hero-section { flex-direction: column; align-items: flex-start; min-height: auto; padding: 2rem 1rem 1.5rem; }
  .topic-hero-aside { position: static; margin-bottom: 1rem; }
  .topic-hero-content { text-align: left; }
  .topic-desc { margin-left: 0; }

  .about-hero-section,
  .privacy-hero-section { flex-direction: column; align-items: flex-start; min-height: auto; padding: 2rem 1rem 1.5rem; }
  .about-hero-aside, .privacy-hero-aside { position: static; margin-bottom: 1rem; }
  .about-hero-content, .privacy-hero-content { text-align: left; }
  .about-subtitle, .privacy-subtitle { margin-left: 0; }

  .content-section, .topic-content-section, .topic-prose-section,
  .article-hero-section, .article-body-section,
  .about-content-section, .privacy-content-section,
  .inner-section, .tag-hero-section, .tag-list-section, .tag-prose-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .footer-cols { grid-template-columns: 1fr; padding: 1.5rem 1rem; }
  .footer-form-block { padding: 2rem 1rem; }
  .subscribe-form { flex-direction: column; align-items: stretch; }
  .subscribe-form input[type="email"] { min-width: auto; width: 100%; }
  .footer-bottom { padding: 1rem; }

  .topic-grid, .article-grid, .child-list, .tag-article-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 400px) {
  .hero-title { font-size: 1.8rem; }
  .topic-title, .about-title, .privacy-title, .tag-title { font-size: 1.5rem; }
  .article-title { font-size: 1.4rem; }
}