/* ===== 字体 ===== */
/* 通过 head.js 引入 Google Fonts: Calistoga / Inter / JetBrains Mono */

/* ===== CSS 自定义属性 ===== */
:root {
  --c-mint: #99ffcc;
  --c-neon: #00ff41;
  --c-navy: #001e3c;
  --c-navy-80: rgba(0, 30, 60, 0.8);
  --c-navy-60: rgba(0, 30, 60, 0.6);
  --c-mint-10: rgba(153, 255, 204, 0.1);
  --c-mint-20: rgba(153, 255, 204, 0.2);
  --c-neon-10: rgba(0, 255, 65, 0.1);
  --c-neon-20: rgba(0, 255, 65, 0.2);
  --c-text: #e0ffe8;
  --c-text-muted: rgba(224, 255, 232, 0.6);
  --c-border: rgba(153, 255, 204, 0.25);
  --c-card-bg: rgba(0, 30, 60, 0.7);
  --r-card: 18px;
  --r-btn: 100px;
  --nav-h: 64px;
  --font-head: 'Calistoga', 'Georgia', serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --max-w: 1180px;
  --prose-w: 740px;
  --gap: clamp(16px, 3vw, 28px);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  background-color: var(--c-navy);
  color: var(--c-text);
  min-height: 100vh;
  overflow-x: hidden;
  padding-bottom: calc(var(--nav-h) + 16px);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-mint); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--c-neon); }
ul { list-style: none; }

/* ===== 有机背景纹理 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%, rgba(0, 255, 65, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 70%, rgba(153, 255, 204, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 80% 30% at 50% 50%, rgba(0, 30, 60, 0.8) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

/* ===== 导航：底部固定条 ===== */
.site-header {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(0, 12, 28, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--c-border);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.site-nav {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gap);
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-nav > p {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.nav-brand {
  margin-right: 8px;
}

.brand-link {
  font-family: var(--font-head);
  font-size: 1.05rem;
  color: var(--c-mint);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.brand-link:hover { color: var(--c-neon); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  flex: 1;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  min-height: 40px;
  border-radius: var(--r-btn);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-muted);
  border: 1px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--c-navy);
  background: var(--c-mint);
  border-color: var(--c-mint);
}

/* ===== HERO 首页 ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px var(--gap) calc(var(--nav-h) + 40px);
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--r-btn);
  border: 1px solid var(--c-neon);
  color: var(--c-neon);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  background: var(--c-neon-10);
  width: fit-content;
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
  color: var(--c-mint);
  text-align: left;
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--c-text-muted);
  max-width: 480px;
}

.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.hero-img {
  border-radius: 24px;
  border: 1px solid var(--c-border);
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  position: relative;
  z-index: 2;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
  animation: breathe 6s ease-in-out infinite;
}
.hero-orb--1 {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(0,255,65,0.2) 0%, transparent 70%);
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}
.hero-orb--2 {
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(153,255,204,0.15) 0%, transparent 70%);
  bottom: 10%;
  left: 5%;
  animation-delay: 3s;
}

.hero-cells {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.cell-svg {
  width: 100%;
  height: 100%;
}

/* ===== PAGE HERO（内页） ===== */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 80px var(--gap) 48px;
  background: linear-gradient(135deg, rgba(0,30,60,0.9) 0%, rgba(0,20,45,1) 100%);
  border-bottom: 1px solid var(--c-border);
}

.page-hero--about {
  background: linear-gradient(135deg, rgba(0,25,50,0.95) 0%, rgba(0,15,35,1) 100%);
}

.page-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.2;
  color: var(--c-mint);
  margin-top: 12px;
  margin-bottom: 14px;
}

.hero-sub {
  font-size: 1rem;
  color: var(--c-text-muted);
  max-width: 640px;
  line-height: 1.7;
}

.page-date {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--c-neon);
  margin-top: 10px;
  font-family: var(--font-mono);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px var(--gap);
  font-size: 0.82rem;
  color: var(--c-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--c-mint); }
.breadcrumb a:hover { color: var(--c-neon); }
.breadcrumb span[aria-hidden] { color: var(--c-border); }

/* ===== MAIN 容器 ===== */
main {
  padding: var(--gap) 0;
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gap);
}

/* ===== 内容区布局：aside 在左 ===== */
.content-section {
  margin-bottom: 48px;
}

.page-content {}

.content-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

.content-aside {
  position: sticky;
  top: 20px;
}

.aside-inner {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-title {
  font-family: var(--font-head);
  font-size: 0.95rem;
  color: var(--c-mint);
  margin-bottom: 4px;
  line-height: 1.3;
}
.aside-title--secondary {
  margin-top: 4px;
}

.aside-link {
  display: block;
  padding: 8px 10px;
  min-height: 40px;
  border-radius: 10px;
  font-size: 0.83rem;
  color: var(--c-text-muted);
  border: 1px solid transparent;
  transition: all 0.18s;
  line-height: 1.4;
  display: flex;
  align-items: center;
}
.aside-link:hover {
  color: var(--c-mint);
  background: var(--c-mint-10);
  border-color: var(--c-border);
}
.aside-link--related {
  border-left: 2px solid var(--c-neon);
  padding-left: 12px;
}

.aside-divider {
  height: 1px;
  background: var(--c-border);
  margin: 8px 0;
}

.content-main {
  min-width: 0;
}

/* ===== 眉题 / eyebrow ===== */
.eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-neon);
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

/* ===== article 标题 ===== */
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
  color: var(--c-mint);
  line-height: 1.25;
  margin-bottom: 24px;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ===== 正文 prose ===== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
  max-width: var(--prose-w);
}
.prose h2 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  color: var(--c-mint);
  margin: 32px 0 12px;
  line-height: 1.3;
}
.prose h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  color: var(--c-mint);
  margin: 24px 0 10px;
}
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol {
  margin: 12px 0 16px 20px;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--c-neon); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--c-mint); }
.prose strong { color: var(--c-mint); font-weight: 600; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--c-mint-10);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--c-neon);
}
.prose blockquote {
  border-left: 3px solid var(--c-neon);
  padding-left: 16px;
  margin: 20px 0;
  color: var(--c-text-muted);
  font-style: italic;
}
.prose--legal { max-width: 100%; }

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
  margin-top: 8px;
}
.card-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  height: 100%;
}

.card--topic,
.card--child,
.card--article {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  transition: border-color 0.2s, transform 0.2s;
  height: 100%;
}
.card--topic:hover,
.card--child:hover,
.card--article:hover {
  border-color: var(--c-mint);
  transform: translateY(-2px);
}

.card-body {
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
}
.card-body h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--c-mint);
}
.card-body h3 a { color: inherit; }
.card-body h3 a:hover { color: var(--c-neon); }
.card-body p {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  flex: 1;
}
.card-meta {
  font-size: 0.75rem;
  color: var(--c-neon);
  font-family: var(--font-mono);
  margin-top: auto;
  padding-top: 8px;
}
.card-meta time { color: inherit; }

/* ===== 文章页 ===== */
.article-header {
  margin-bottom: 32px;
}
.article-hero {
  border-radius: var(--r-card);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--c-border);
}
.article-hero-img {
  width: 100%;
  max-height: 340px;
  object-fit: cover;
}
.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.art-date {
  font-size: 0.78rem;
  color: var(--c-neon);
  font-family: var(--font-mono);
}
.article-title {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--c-mint);
  line-height: 1.2;
  margin-bottom: 12px;
}
.article-desc {
  font-size: 1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: var(--prose-w);
}
.article-prose {
  margin-top: 24px;
}
.article-footer-nav {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  min-height: 44px;
  border-radius: var(--r-btn);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: 2px solid transparent;
  width: fit-content;
}
.btn--primary {
  background: var(--c-neon);
  color: var(--c-navy);
  border-color: var(--c-neon);
}
.btn--primary:hover {
  background: var(--c-mint);
  border-color: var(--c-mint);
  color: var(--c-navy);
}
.btn--outline {
  background: transparent;
  color: var(--c-mint);
  border-color: var(--c-mint);
}
.btn--outline:hover {
  background: var(--c-mint-20);
  color: var(--c-neon);
  border-color: var(--c-neon);
}

/* ===== 标签云 ===== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.tag-link {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--r-btn);
  border: 1px solid var(--c-border);
  font-size: 0.75rem;
  color: var(--c-text-muted);
  transition: all 0.18s;
}
.tag-link:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
  background: var(--c-neon-10);
}

/* ===== 专题/子页 区块 ===== */
.topics-section,
.recent-section,
.children-section {
  margin-bottom: 56px;
}

/* ===== 页脚：极简 p + small ===== */
.site-footer {
  text-align: center;
  padding: 60px var(--gap) 32px;
  border-top: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}
.footer-brand {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 8vw, 5rem);
  color: var(--c-mint);
  opacity: 0.12;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  pointer-events: none;
  user-select: none;
}
.footer-copy {
  display: block;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}
.footer-copy a {
  color: var(--c-mint);
  margin: 0 4px;
}
.footer-copy a:hover { color: var(--c-neon); }

/* ===== 动效 ===== */
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.12); opacity: 1; }
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--c-border); }
  50% { border-color: rgba(153,255,204,0.5); }
}

.card--topic { animation: pulse-border 4s ease-in-out infinite; }
.card--topic:nth-child(2) { animation-delay: 1s; }
.card--topic:nth-child(3) { animation-delay: 2s; }
.card--topic:nth-child(4) { animation-delay: 3s; }

/* 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;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-media { display: none; }
  .card-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .content-layout {
    grid-template-columns: 1fr;
  }
  .content-aside {
    position: static;
  }
}

@media (max-width: 600px) {
  :root { --gap: 16px; }

  .hero-section {
    padding: 60px var(--gap) calc(var(--nav-h) + 32px);
    min-height: 100svh;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .page-hero {
    padding: 60px var(--gap) 36px;
  }
  .page-hero h1 {
    font-size: 1.6rem;
  }
  .card-grid,
  .card-grid--3 {
    grid-template-columns: 1fr;
  }
  .nav-links a {
    padding: 8px 10px;
    font-size: 0.76rem;
  }
  .brand-link {
    font-size: 0.9rem;
  }
  .article-title {
    font-size: 1.5rem;
  }
  .section-title {
    font-size: 1.3rem;
  }
  .content-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .aside-inner {
    padding: 18px 16px;
  }
}

/* ===== 首页特殊 ===== */
.page-home main {
  padding-top: 48px;
}

/* ===== Parallax 微交互（JS 驱动，CSS 备用） ===== */
.hero-cells {
  will-change: transform;
}