@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Orbitron:wght@700;900&display=swap');

/* ===== 变量 ===== */
:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-bg: #26171f;
  --c-bg2: #1e1018;
  --c-bg3: #321f2a;
  --c-surface: #2f1d27;
  --c-text: #f0d8e8;
  --c-text-muted: #a07890;
  --c-border: #5a2f45;
  --c-neon: #ff0080;
  --c-neon2: #ff00ff;
  --font-title: 'Orbitron', 'Courier New', monospace;
  --font-body: 'JetBrains Mono', 'Courier New', monospace;
  --nav-h: 64px;
  --radius: 4px;
  --max-w: 1200px;
  --transition: 0.25s 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: var(--c-bg); color: var(--c-text); font-family: var(--font-body); font-size: 16px; line-height: 1.7; min-height: 100vh; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--c-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-secondary); }
ul, ol, menu { list-style: none; }
h1,h2,h3,h4 { font-family: var(--font-title); line-height: 1.2; letter-spacing: 0.04em; }

/* ===== 极光背景 ===== */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.aurora-layer {
  position: absolute;
  border-radius: 50%;
  mix-blend-mode: screen;
  opacity: 0.35;
  filter: blur(80px);
  animation: aurora-drift 18s ease-in-out infinite alternate;
}
.aurora-layer.a1 {
  width: 80vw; height: 60vh;
  top: -20vh; left: -20vw;
  background: radial-gradient(ellipse at center, #ff008088 0%, #ff00ff44 50%, transparent 80%);
  animation-duration: 20s;
}
.aurora-layer.a2 {
  width: 60vw; height: 70vh;
  top: 10vh; right: -15vw;
  background: radial-gradient(ellipse at center, #ff00ff66 0%, #8000ff44 50%, transparent 80%);
  animation-duration: 25s;
  animation-delay: -8s;
}
.aurora-layer.a3 {
  width: 50vw; height: 40vh;
  bottom: -10vh; left: 25vw;
  background: radial-gradient(ellipse at center, #ff008055 0%, #ff00cc33 60%, transparent 85%);
  animation-duration: 22s;
  animation-delay: -4s;
}
@keyframes aurora-drift {
  0% { transform: translate(0,0) scale(1); }
  33% { transform: translate(5vw,3vh) scale(1.05); }
  66% { transform: translate(-3vw,6vh) scale(0.97); }
  100% { transform: translate(2vw,-4vh) scale(1.03); }
}
@media (prefers-reduced-motion: reduce) {
  .aurora-layer { animation: none; }
}

/* ===== 导航 ===== */
.top-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 16px 8px;
}
.nav-details {
  background: rgba(38,23,31,0.92);
  border: 1px solid var(--c-border);
  border-radius: 32px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  box-shadow: 0 0 24px rgba(255,0,128,0.18), 0 2px 32px rgba(0,0,0,0.5);
}
.nav-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.nav-brand::-webkit-details-marker { display: none; }
.brand-text {
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 700;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
}
.nav-toggle-icon {
  font-size: 22px;
  color: var(--c-primary);
  line-height: 1;
}
.nav-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--c-border);
}
.nav-menu li a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-family: var(--font-title);
  font-weight: 700;
  letter-spacing: 0.04em;
  background: var(--c-surface);
  color: var(--c-text);
  border: 1px solid var(--c-border);
  min-height: 40px;
  line-height: 24px;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.nav-menu li a:hover,
.nav-menu li a[aria-current="page"] {
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 12px var(--c-primary);
}

/* ===== 通用布局工具 ===== */
.page-wrap { position: relative; z-index: 1; }
main { position: relative; z-index: 1; padding-bottom: calc(var(--nav-h) + 32px); }

/* 两栏：aside左 + 正文右 */
.two-col {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero 通用 ===== */
.hero-skew {
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 80px;
  background: var(--c-bg);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0 100%);
  z-index: 2;
}

/* ===== 首页 Hero ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 80px;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    conic-gradient(from 200deg at 30% 40%, #ff008033, #ff00ff22, transparent 40%),
    linear-gradient(135deg, rgba(38,23,31,0.7) 0%, rgba(50,20,40,0.9) 100%);
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 3;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 120px 24px 40px;
  width: 100%;
}
.hero-figure {
  margin-bottom: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  max-height: 360px;
}
.hero-img { width: 100%; object-fit: cover; }
.hero-badge-wrap { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-family: var(--font-title);
  font-weight: 700;
  letter-spacing: 0.1em;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  box-shadow: 0 0 12px var(--c-primary);
}
.hero-badge--alt {
  background: transparent;
  border: 1px solid var(--c-secondary);
  color: var(--c-secondary);
  box-shadow: 0 0 10px var(--c-secondary);
}
.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 32px var(--c-primary), 0 0 8px var(--c-secondary);
  margin-bottom: 20px;
  max-width: 700px;
}
.hero-lead {
  font-size: 17px;
  color: var(--c-text-muted);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 28px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  box-shadow: 0 0 24px var(--c-primary), 0 4px 16px rgba(0,0,0,0.4);
  transition: box-shadow var(--transition), transform var(--transition);
  min-height: 48px;
  line-height: 20px;
}
.hero-cta:hover { color: #fff; box-shadow: 0 0 40px var(--c-primary), 0 8px 24px rgba(0,0,0,0.5); transform: translateY(-2px); }

/* ===== 首页主体 ===== */
.home-main { position: relative; z-index: 1; }

.topics-section {
  max-width: var(--max-w);
  margin: 48px auto 0;
  padding: 0 24px 48px;
}
.topics-section > .section-aside {
  margin-bottom: 32px;
  border-left: 3px solid var(--c-primary);
  padding-left: 16px;
}
.section-aside-title { font-size: 1.5rem; color: #fff; margin-bottom: 8px; }
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.topic-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--c-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 24px rgba(255,0,128,0.25);
  border-color: var(--c-primary);
}
.card-figure { margin-bottom: 16px; border-radius: var(--radius); overflow: hidden; }
.card-img { width: 100%; height: 160px; object-fit: cover; }
.card-title { font-size: 1.1rem; margin-bottom: 8px; }
.card-title a { color: #fff; }
.card-title a:hover { color: var(--c-primary); }
.card-desc { font-size: 13px; color: var(--c-text-muted); margin-bottom: 16px; }
.card-link { font-size: 13px; color: var(--c-primary); font-family: var(--font-title); }
.card-link:hover { color: var(--c-secondary); }

.recent-section {
  background: var(--c-bg2);
  padding: 48px 24px;
  position: relative;
}
.section-deco {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-primary), var(--c-secondary), transparent);
  margin: 0;
}
.recent-aside {
  max-width: var(--max-w);
  margin: 0 auto 32px;
  border-left: 3px solid var(--c-secondary);
  padding-left: 16px;
}
.recent-aside h2 { font-size: 1.5rem; color: #fff; margin-bottom: 8px; }
.recent-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.art-item {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--c-border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.art-item:hover { border-color: var(--c-primary); box-shadow: 0 0 16px rgba(255,0,128,0.15); }
.art-title { font-size: 1rem; margin-bottom: 8px; }
.art-title a { color: #fff; }
.art-title a:hover { color: var(--c-primary); }
.art-date { font-size: 12px; color: var(--c-text-muted); display: block; margin-bottom: 8px; }
.art-desc { font-size: 13px; color: var(--c-text-muted); }

.content-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
}
.content-aside { padding-top: 4px; }
.aside-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-family: var(--font-title);
  border: 1px solid var(--c-primary);
  color: var(--c-primary);
  letter-spacing: 0.06em;
}

/* ===== p.subtitle ===== */
.subtitle { font-size: 14px; color: var(--c-text-muted); line-height: 1.6; margin-top: 4px; }

/* ===== 正文容器 ===== */
.content-body { position: relative; }
.content-body.prose h2 { font-size: 1.25rem; color: #fff; margin: 32px 0 12px; border-bottom: 1px solid var(--c-border); padding-bottom: 8px; }
.content-body.prose h3 { font-size: 1.05rem; color: var(--c-text); margin: 24px 0 8px; }
.content-body.prose p { margin-bottom: 16px; color: var(--c-text); }
.content-body.prose ul, .content-body.prose ol { margin: 0 0 16px 20px; }
.content-body.prose li { margin-bottom: 6px; }
.content-body.prose a { color: var(--c-primary); text-decoration: underline; }
.content-body.prose img { border-radius: var(--radius); margin: 16px 0; }
.content-body.prose blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 8px 16px;
  margin: 16px 0;
  background: var(--c-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.content-body.prose time { color: var(--c-text-muted); font-size: 13px; }

/* ===== Topic 页 ===== */
.topic-hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 60px;
}
.topic-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(38,23,31,0.6), rgba(50,15,35,0.95));
  z-index: 0;
}
.topic-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 120px 24px 40px;
  width: 100%;
}
.topic-hero-figure { margin-bottom: 20px; border-radius: var(--radius); overflow: hidden; max-height: 300px; }
.topic-hero-img { width: 100%; object-fit: cover; }
.topic-hero-aside { margin-bottom: 16px; }
.topic-h1 { font-size: clamp(1.8rem, 4vw, 3rem); color: #fff; text-shadow: 0 0 20px var(--c-primary); margin-bottom: 16px; }
.topic-lead { font-size: 16px; max-width: 600px; }

.topic-main { position: relative; z-index: 1; }
.topic-content-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 48px auto 0;
  padding: 0 24px 48px;
}
.topic-aside {
  position: sticky;
  top: 24px;
  align-self: start;
}
.aside-nav-title { font-size: 1rem; color: #fff; margin-bottom: 8px; }
.aside-nav-list { margin-top: 12px; }
.aside-nav-list li { margin-bottom: 8px; }
.aside-nav-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--c-text-muted);
  border: 1px solid transparent;
  min-height: 40px;
  line-height: 24px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.aside-nav-list a:hover {
  color: var(--c-primary);
  border-color: var(--c-border);
  background: var(--c-surface);
}
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag-pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 12px;
  font-family: var(--font-title);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
  min-height: 28px;
  line-height: 20px;
}
.tag-pill:hover { color: var(--c-primary); border-color: var(--c-primary); box-shadow: 0 0 8px var(--c-primary); }
.tag-pill--active { color: var(--c-primary); border-color: var(--c-primary); }
.topic-body { min-width: 0; }
.topic-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
  margin-bottom: 24px;
}

.child-section {
  background: var(--c-bg2);
  padding: 48px 24px;
  position: relative;
}
.child-section-aside {
  max-width: var(--max-w);
  margin: 0 auto 32px;
  border-left: 3px solid var(--c-primary);
  padding-left: 16px;
}
.child-section-aside h2 { font-size: 1.4rem; color: #fff; margin-bottom: 6px; }
.child-list {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.child-dt {
  background: var(--c-surface);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 16px 16px 8px;
  border: 1px solid var(--c-border);
  border-bottom: none;
}
.child-dt a { font-family: var(--font-title); font-size: 1rem; color: #fff; font-weight: 700; }
.child-dt a:hover { color: var(--c-primary); }
.child-dd {
  background: var(--c-surface);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 8px 16px 16px;
  border: 1px solid var(--c-border);
  border-top: none;
}
.child-figure { margin-bottom: 10px; border-radius: var(--radius); overflow: hidden; }
.child-img { width: 100%; height: 120px; object-fit: cover; }
.child-desc { font-size: 13px; color: var(--c-text-muted); display: block; margin-bottom: 8px; }
.child-dd time { font-size: 12px; color: var(--c-text-muted); }

/* ===== Article 页 ===== */
.art-header {
  position: relative;
  overflow: hidden;
  padding-bottom: 40px;
}
.art-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(38,23,31,0.8) 0%, rgba(30,16,24,0.97) 100%);
  z-index: 0;
}
.art-header-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 24px 32px;
}
.art-hero-figure { margin-bottom: 20px; border-radius: var(--radius); overflow: hidden; max-height: 320px; }
.art-hero-img { width: 100%; object-fit: cover; }
.art-header-aside { margin-bottom: 12px; }
.art-h1 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); color: #fff; text-shadow: 0 0 20px rgba(255,0,128,0.5); margin-bottom: 12px; }
.art-meta { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 12px; }
.meta-date { font-size: 13px; color: var(--c-text-muted); }

.breadcrumb { font-size: 13px; color: var(--c-text-muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--c-text-muted); }
.breadcrumb a:hover { color: var(--c-primary); }

.art-main { position: relative; z-index: 1; }
.art-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 40px auto 0;
  padding: 0 24px 48px;
}
.art-aside {
  position: sticky;
  top: 24px;
  align-self: start;
}
.aside-section-title { font-size: 1rem; color: #fff; margin-bottom: 6px; }
.related-list { margin-top: 12px; }
.related-list li { margin-bottom: 8px; }
.related-list a {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--c-text-muted);
  border-radius: var(--radius);
  border: 1px solid transparent;
  min-height: 40px;
  line-height: 24px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.related-list a:hover { color: var(--c-primary); border-color: var(--c-border); background: var(--c-surface); }
.aside-nav-section { margin-top: 24px; }
.aside-label { font-size: 11px; font-family: var(--font-title); color: var(--c-text-muted); letter-spacing: 0.1em; display: block; margin-bottom: 8px; }
.art-content { min-width: 0; }
.art-content-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
  margin-bottom: 24px;
}

/* ===== Tag 页 ===== */
.tag-hero {
  position: relative;
  min-height: 35vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 32px;
}
.tag-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(38,23,31,0.75), rgba(45,18,32,0.95));
  z-index: 0;
}
.tag-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 24px 32px;
  width: 100%;
}
.tag-hero-aside { margin-bottom: 12px; }
.tag-h1 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); color: #fff; margin-bottom: 12px; }
.tag-lead { font-size: 16px; max-width: 560px; }
.tag-main { position: relative; z-index: 1; }
.tag-content-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 40px auto 0;
  padding: 0 24px 48px;
}
.tag-aside { position: sticky; top: 24px; align-self: start; }
.tag-body { min-width: 0; }
.tag-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-secondary), var(--c-primary), transparent);
  margin-bottom: 24px;
}
.tag-articles { margin-top: 40px; }
.tag-dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

/* ===== About 页 ===== */
.about-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 60px;
}
.about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    conic-gradient(from 120deg at 60% 50%, #ff00ff22, #ff008033, transparent 50%),
    linear-gradient(140deg, rgba(38,23,31,0.7), rgba(30,16,24,0.95));
  z-index: 0;
}
.about-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 110px 24px 40px;
  width: 100%;
}
.about-hero-aside { margin-bottom: 16px; }
.about-h1 { font-size: clamp(1.8rem, 4vw, 3rem); color: #fff; text-shadow: 0 0 24px var(--c-secondary); margin-bottom: 16px; }
.about-lead { font-size: 16px; max-width: 600px; }
.about-main { position: relative; z-index: 1; }
.about-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 48px auto 0;
  padding: 0 24px 40px;
}
.about-aside { position: sticky; top: 24px; align-self: start; }
.about-aside-links { margin-top: 20px; display: flex; flex-direction: column; gap: 8px; }
.aside-link {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  min-height: 40px;
  line-height: 24px;
  transition: color var(--transition), border-color var(--transition);
}
.aside-link:hover { color: var(--c-primary); border-color: var(--c-primary); }
.about-body { min-width: 0; }
.about-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-secondary), var(--c-primary), transparent);
  margin-bottom: 24px;
}
.about-topics-section {
  background: var(--c-bg2);
  padding: 48px 24px;
  position: relative;
}
.about-topics-aside {
  max-width: var(--max-w);
  margin: 0 auto 32px;
  border-left: 3px solid var(--c-secondary);
  padding-left: 16px;
}
.about-topics-aside h2 { font-size: 1.4rem; color: #fff; margin-bottom: 8px; }
.about-topics-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.about-topic-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--c-border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.about-topic-card:hover { border-color: var(--c-secondary); box-shadow: 0 0 16px rgba(255,0,255,0.15); }
.about-topic-card h3 { font-size: 1rem; margin-bottom: 8px; }
.about-topic-card h3 a { color: #fff; }
.about-topic-card h3 a:hover { color: var(--c-secondary); }
.about-topic-card p { font-size: 13px; color: var(--c-text-muted); }

/* ===== Privacy 页 ===== */
.privacy-header {
  position: relative;
  overflow: hidden;
  padding-bottom: 32px;
}
.privacy-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(38,23,31,0.85), rgba(30,16,24,0.97));
  z-index: 0;
}
.privacy-header-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 24px 32px;
}
.privacy-header-aside { margin-bottom: 12px; }
.privacy-h1 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); color: #fff; margin-bottom: 12px; }
.privacy-date { font-size: 13px; color: var(--c-text-muted); display: block; margin-bottom: 8px; }
.privacy-lead { font-size: 16px; max-width: 560px; }
.privacy-main { position: relative; z-index: 1; }
.privacy-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 40px auto 0;
  padding: 0 24px 48px;
}
.privacy-aside { position: sticky; top: 24px; align-self: start; }
.privacy-body { min-width: 0; }
.privacy-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
  margin-bottom: 24px;
}

/* ===== Default 页 ===== */
.default-main { position: relative; z-index: 1; }
.default-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: var(--max-w);
  margin: 80px auto 0;
  padding: 0 24px 48px;
}
.default-aside { position: sticky; top: 24px; align-self: start; }
.default-aside h2 { font-size: 1rem; color: #fff; margin-bottom: 8px; }
.default-body { min-width: 0; }
.default-deco {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
  margin-bottom: 24px;
}
.default-h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); color: #fff; margin-bottom: 20px; }

/* ===== 页脚 ===== */
.site-footer {
  position: relative;
  z-index: 10;
  background: var(--c-bg2);
  border-top: 1px solid var(--c-border);
  padding: 0 0 calc(var(--nav-h) + 16px);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand {
  font-family: var(--font-title);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.footer-nav ul { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.footer-nav a {
  font-size: 13px;
  color: var(--c-text-muted);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--c-primary); }
.footer-copy {
  font-size: 12px;
  color: var(--c-text-muted);
  margin-left: auto;
  white-space: nowrap;
}
.footer-copy a { color: var(--c-text-muted); }
.footer-copy a:hover { color: var(--c-primary); }

/* ===== 霓虹光效装饰 ===== */
.dark-body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-primary), var(--c-secondary), transparent);
  z-index: 200;
  pointer-events: none;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .content-section,
  .topic-content-section,
  .art-section,
  .tag-content-section,
  .about-section,
  .privacy-section,
  .default-section {
    grid-template-columns: 1fr;
  }
  .topic-aside,
  .art-aside,
  .tag-aside,
  .about-aside,
  .privacy-aside,
  .default-aside {
    position: static;
  }
  .content-section { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 2rem; }
  .topics-grid { grid-template-columns: 1fr; }
  .recent-grid { grid-template-columns: 1fr; }
  .child-list { grid-template-columns: 1fr; }
  .about-topics-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-copy { margin-left: 0; }
  .nav-menu { gap: 6px; }
  .nav-menu li a { padding: 8px 12px; font-size: 12px; }
  .hero-section { min-height: 100dvh; }
}

@media (max-width: 480px) {
  .hero-inner { padding: 80px 16px 32px; }
  .topic-hero-inner, .tag-hero-inner, .about-hero-inner,
  .privacy-header-inner, .art-header-inner { padding: 80px 16px 24px; }
  .topics-section, .child-section, .recent-section,
  .about-topics-section { padding-left: 16px; padding-right: 16px; }
  .art-section, .topic-content-section, .tag-content-section,
  .about-section, .privacy-section, .default-section { padding: 0 16px 32px; }
  .footer-inner { padding: 16px; }
  .brand-text { font-size: 12px; }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-bg2); }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-primary); }

/* ===== 选中颜色 ===== */
::selection { background: rgba(255,0,128,0.35); color: #fff; }