@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');

/* ===== 自定义属性 ===== */
:root {
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-bg: #1c1726;
  --c-bg2: #231b32;
  --c-bg3: #2d2242;
  --c-border: #6514ff;
  --c-border-dim: #3d2a6e;
  --c-text: #f0eaff;
  --c-text-dim: #b39ddb;
  --c-text-muted: #7c6a9e;
  --c-glow: rgba(101, 20, 255, 0.35);
  --c-glow2: rgba(191, 0, 255, 0.25);
  --radius: 28px;
  --radius-sm: 12px;
  --gap: 48px;
  --gap-sm: 24px;
  --gap-xs: 12px;
  --font-code: 'Fira Code', 'Cascadia Code', monospace;
  --font-body: 'Fira Sans', system-ui, sans-serif;
  --header-h: 72px;
  --announce-h: 36px;
  --transition: 200ms cubic-bezier(.4,0,.2,1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== 点阵底纹动画 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(101,20,255,0.18) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
  animation: dotMove 18s linear infinite;
}
@keyframes dotMove {
  from { background-position: 0 0; }
  to   { background-position: 28px 28px; }
}
@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
}

/* ===== 公告条 ===== */
.announce-bar {
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-family: var(--font-code);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  padding: 0 var(--gap-sm);
  height: var(--announce-h);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  z-index: 100;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(28, 23, 38, .96);
  backdrop-filter: blur(12px);
  border-bottom: 1.5px solid var(--c-border-dim);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gap-sm);
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
}
.brand { flex: 0 0 auto; }
.brand-link {
  font-family: var(--font-code);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: color var(--transition);
}
.brand-link:hover { color: var(--c-accent); }
.site-header nav { flex: 1; overflow: hidden; }
.site-header nav p {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--gap-xs);
  align-items: center;
  margin: 0;
  padding: 0;
}
.site-header nav p a {
  font-family: var(--font-code);
  font-size: .82rem;
  font-weight: 500;
  color: var(--c-text-dim);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.site-header nav p a:hover,
.site-header nav p a[aria-current="page"] {
  background: var(--c-bg3);
  color: var(--c-text);
}
.site-header nav p a[aria-current="page"] {
  color: var(--c-accent);
  border-bottom: 2px solid var(--c-accent);
}

/* ===== 锚点条（sticky 二级） ===== */
.anchor-bar {
  position: sticky;
  top: calc(var(--header-h) + var(--announce-h));
  z-index: 150;
  background: var(--c-bg2);
  border-bottom: 1px solid var(--c-border-dim);
}
.anchor-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gap-sm);
  display: flex;
  gap: var(--gap-xs);
  overflow-x: auto;
  scrollbar-width: none;
}
.anchor-bar-inner::-webkit-scrollbar { display: none; }
.anchor-bar-inner a {
  font-family: var(--font-code);
  font-size: .78rem;
  color: var(--c-text-muted);
  text-decoration: none;
  padding: 10px 14px;
  white-space: nowrap;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}
.anchor-bar-inner a:hover { color: var(--c-accent); }

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-family: var(--font-code);
  font-size: .78rem;
  color: var(--c-text-muted);
  margin-bottom: var(--gap-sm);
}
.breadcrumb a {
  color: var(--c-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--c-accent); }

/* ===== 主体布局 ===== */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--gap) var(--gap-sm);
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--gap);
  position: relative;
  z-index: 1;
}

/* ===== article / div ===== */
article {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}
article > div {
  background: var(--c-bg2);
  border: 1.5px solid var(--c-border-dim);
  border-radius: var(--radius);
  padding: var(--gap-sm) var(--gap);
}

/* ===== h 标题 ===== */
h1 {
  font-family: var(--font-code);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin-bottom: var(--gap-sm);
  background: linear-gradient(120deg, #fff 30%, var(--c-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
h2 {
  font-family: var(--font-code);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: .02em;
  margin-bottom: var(--gap-sm);
  color: var(--c-text);
}
h2 > span {
  display: inline-block;
  border-left: 4px solid var(--c-primary);
  padding-left: 12px;
  color: var(--c-text);
}
h3 {
  font-family: var(--font-code);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text-dim);
  margin-bottom: var(--gap-xs);
  letter-spacing: .03em;
}
h3 > span {
  display: inline-block;
  color: inherit;
}

/* ===== 页面头部区 ===== */
.page-header-section { background: var(--c-bg2); }
.page-lead {
  font-size: 1.05rem;
  color: var(--c-text-dim);
  margin-top: var(--gap-xs);
  line-height: 1.7;
}

/* ===== entry meta ===== */
.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-xs);
  margin-bottom: var(--gap-xs);
}
.entry-date {
  font-family: var(--font-code);
  font-size: .78rem;
  color: var(--c-text-muted);
  background: var(--c-bg3);
  border: 1px solid var(--c-border-dim);
  border-radius: 6px;
  padding: 3px 10px;
}

/* ===== 正文 ===== */
.content-prose {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-text);
}
.content-prose h2 { margin-top: var(--gap-sm); }
.content-prose h3 { margin-top: 20px; }
.content-prose p { margin-bottom: 16px; }
.content-prose a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.content-prose a:hover { color: #fff; }
.content-prose ul, .content-prose ol {
  padding-left: 24px;
  margin-bottom: 16px;
}
.content-prose li { margin-bottom: 6px; }
.content-prose table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-code);
  font-size: .88rem;
  margin-bottom: 20px;
}
.content-prose th, .content-prose td {
  border: 1px solid var(--c-border-dim);
  padding: 10px 14px;
  text-align: left;
}
.content-prose th {
  background: var(--c-bg3);
  color: var(--c-accent);
  font-weight: 700;
}
.content-prose tr:nth-child(even) td { background: rgba(101,20,255,.06); }
.privacy-prose { max-width: 760px; }

/* ===== Hero（首页） ===== */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
  align-items: center;
  min-height: 70vh;
  background: var(--c-bg2);
  position: relative;
  overflow: hidden;
}
.hero-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, var(--c-glow), transparent 60%),
    radial-gradient(ellipse at 80% 30%, var(--c-glow2), transparent 55%);
  pointer-events: none;
}
.hero-text {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}
.hero-eyebrow {
  font-family: var(--font-code);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--c-accent);
  text-transform: uppercase;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-xs);
  margin-top: 8px;
}
.hero-media {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1.5px solid var(--c-border);
  display: block;
}
.hero-deco-grid {
  position: absolute;
  inset: -16px;
  background-image:
    linear-gradient(var(--c-border-dim) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border-dim) 1px, transparent 1px);
  background-size: 32px 32px;
  border-radius: var(--radius);
  opacity: .3;
  pointer-events: none;
  z-index: -1;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  min-height: 44px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-family: var(--font-code);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: none;
  transition: opacity var(--transition), transform var(--transition);
}
.btn-primary:hover { opacity: .85; transform: translateY(-2px); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  min-height: 44px;
  background: transparent;
  color: var(--c-text);
  font-family: var(--font-code);
  font-weight: 600;
  font-size: .88rem;
  letter-spacing: .03em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--c-border);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn-secondary:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

/* ===== Child blocks（子页卡片 — 符合结构抽签要求） ===== */
.child-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap-sm);
}
a.child-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--gap-sm);
  background: var(--c-bg3);
  border: 1.5px solid var(--c-border-dim);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-text);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  min-height: 120px;
}
a.child-block:hover {
  border-color: var(--c-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px var(--c-glow);
}
a.child-block > strong {
  font-family: var(--font-code);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.3;
}
a.child-block .child-desc {
  font-size: .88rem;
  color: var(--c-text-dim);
  line-height: 1.5;
  flex: 1;
}
a.child-block .child-meta {
  font-family: var(--font-code);
  font-size: .75rem;
  color: var(--c-text-muted);
}

/* ===== Entry grid（首页近期词条） ===== */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--gap-sm);
}
a.entry-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--gap-sm);
  background: var(--c-bg3);
  border: 1.5px solid var(--c-border-dim);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-text);
  transition: border-color var(--transition), transform var(--transition);
}
a.entry-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-3px);
}
a.entry-card > strong {
  font-family: var(--font-code);
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-text);
}
a.entry-card .entry-card-desc {
  font-size: .84rem;
  color: var(--c-text-dim);
  flex: 1;
}
a.entry-card .entry-card-date {
  font-family: var(--font-code);
  font-size: .75rem;
  color: var(--c-text-muted);
}

/* ===== Tag 徽章 ===== */
.tag-badge {
  display: inline-block;
  font-family: var(--font-code);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 6px 18px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  margin-bottom: var(--gap-xs);
}

/* ===== About stats ===== */
.about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}
.stat-block {
  flex: 1 1 120px;
  background: var(--c-bg3);
  border: 1.5px solid var(--c-border-dim);
  border-radius: var(--radius-sm);
  padding: var(--gap-sm);
  text-align: center;
}
.stat-num {
  font-family: var(--font-code);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-family: var(--font-code);
  font-size: .78rem;
  color: var(--c-text-muted);
  letter-spacing: .08em;
}

/* ===== Hero entry ===== */
.entry-hero {
  margin-bottom: var(--gap-sm);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1.5px solid var(--c-border-dim);
}
.entry-hero-img {
  width: 100%;
  height: auto;
  display: block;
  max-height: 440px;
  object-fit: cover;
}

/* ===== 相关链接按钮组 ===== */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-xs);
}

/* ===== 侧边栏 ===== */
aside.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  align-self: start;
  position: sticky;
  top: calc(var(--header-h) + var(--announce-h) + var(--gap-sm));
}
.sidebar-block {
  background: var(--c-bg2);
  border: 1.5px solid var(--c-border-dim);
  border-radius: var(--radius);
  padding: var(--gap-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sidebar-block h3 {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border-dim);
}
a.sidebar-link {
  display: block;
  font-family: var(--font-code);
  font-size: .82rem;
  color: var(--c-text-dim);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: background var(--transition), color var(--transition);
}
a.sidebar-link:hover {
  background: var(--c-bg3);
  color: var(--c-accent);
}
.sidebar-stat {
  text-align: center;
  padding: var(--gap-sm);
}
a.tag-pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-code);
  font-size: .78rem;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(101,20,255,.12);
  border: 1px solid var(--c-primary);
  border-radius: 100px;
  padding: 6px 14px;
  min-height: 36px;
  text-decoration: none;
  margin: 2px;
  transition: background var(--transition), color var(--transition);
}
a.tag-pill:hover {
  background: var(--c-primary);
  color: #fff;
}

/* ===== 首页 sidebar-stat ===== */
.sidebar-stat .stat-num { font-size: 2rem; }

/* ===== 页脚 ===== */
.site-footer {
  border-top: 1.5px solid var(--c-border-dim);
  background: var(--c-bg);
  position: relative;
  z-index: 1;
  margin-top: var(--gap);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--gap-sm) var(--gap-sm);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-sm);
}
.footer-brand {
  font-family: var(--font-code);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--c-text-muted);
  flex: 0 0 auto;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  flex: 1;
}
.site-footer nav a {
  font-family: var(--font-code);
  font-size: .82rem;
  color: var(--c-text-muted);
  text-decoration: none;
  padding: 10px 14px;
  min-height: 40px;
  display: flex;
  align-items: center;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}
.site-footer nav a:hover {
  color: var(--c-text);
  background: var(--c-bg2);
}
.footer-copy {
  font-family: var(--font-code);
  font-size: .75rem;
  color: var(--c-text-muted);
  white-space: nowrap;
}

/* ===== empty note ===== */
.empty-note {
  color: var(--c-text-muted);
  font-style: italic;
  font-size: .9rem;
}

/* ===== Scroll reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .4s ease, transform .4s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  main {
    grid-template-columns: 1fr;
  }
  aside.sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--gap-xs);
  }
  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: var(--gap-sm);
  }
  .hero-media { display: none; }
}
@media (max-width: 768px) {
  :root {
    --gap: 32px;
    --gap-sm: 16px;
  }
  .site-header nav p {
    display: none;
  }
  .site-header .header-inner {
    justify-content: space-between;
  }
  .brand-link { font-size: .9rem; }
  .footer-brand { font-size: 1.1rem; }
  .footer-copy { font-size: .7rem; }
  .child-blocks {
    grid-template-columns: 1fr;
  }
  .entry-grid {
    grid-template-columns: 1fr 1fr;
  }
  article > div {
    padding: var(--gap-sm);
  }
}
@media (max-width: 480px) {
  .entry-grid { grid-template-columns: 1fr; }
  .about-stats { flex-direction: column; }
  .hero-cta { flex-direction: column; }
  .site-header nav p { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: var(--gap-xs); }
  h1 { font-size: 1.5rem; }
}

/* ===== 移动端导航 fallback（汉堡展开） ===== */
@media (max-width: 768px) {
  .site-header nav { overflow: visible; }
  .site-header nav p {
    display: none;
    flex-direction: column;
    position: absolute;
    top: calc(var(--header-h) + var(--announce-h));
    left: 0;
    right: 0;
    background: var(--c-bg2);
    border-bottom: 1.5px solid var(--c-border-dim);
    padding: var(--gap-xs) var(--gap-sm);
    z-index: 300;
  }
  .site-header nav p.open { display: flex; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: 1.5px solid var(--c-border-dim);
    border-radius: 8px;
    color: var(--c-text);
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: auto;
    font-family: var(--font-code);
    transition: border-color var(--transition);
    flex-shrink: 0;
  }
  .nav-toggle:hover { border-color: var(--c-primary); }
}
@media (min-width: 769px) {
  .nav-toggle { display: none; }
}