@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

/* ── 变量 ── */
:root {
  --c-mint: #5cc6b0;
  --c-sand: #d4c4a8;
  --c-dark: #172623;
  --c-dark2: #1e3330;
  --c-dark3: #253d39;
  --c-mint-dim: rgba(92,198,176,0.18);
  --c-mint-glow: rgba(92,198,176,0.32);
  --c-sand-dim: rgba(212,196,168,0.12);
  --c-text: #e8dfd0;
  --c-text-muted: #a89e8e;
  --c-glass: rgba(30,51,48,0.62);
  --c-glass-border: rgba(92,198,176,0.22);
  --radius-card: 28px;
  --radius-sm: 12px;
  --radius-btn: 50px;
  --font: 'Plus Jakarta Sans', 'Noto Sans SC', system-ui, sans-serif;
  --shadow-soft: 0 4px 32px rgba(23,38,35,0.45);
  --shadow-card: 0 8px 40px rgba(23,38,35,0.55);
  --bn-h: 64px;
  --transition: 0.32s 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-dark);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  min-height: 100vh;
  padding-bottom: var(--bn-h);
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--c-mint); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-sand); }
ol, ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }

/* ── 页面容器 ── */
.page-wrap { min-height: 100vh; }

/* ── 玻璃卡片基础 ── */
.glass-card {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
}

/* ── 遮罩全屏菜单 ── */
.overlay-menu {
  position: fixed;
  inset: 0;
  background: rgba(23,38,35,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.overlay-menu.is-open {
  opacity: 1;
  pointer-events: all;
}
.overlay-menu[aria-hidden="false"] {
  opacity: 1;
  pointer-events: all;
}
.overlay-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--c-mint-dim);
  border: 1px solid var(--c-glass-border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.2rem;
  color: var(--c-mint);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.overlay-close:hover { background: var(--c-mint-glow); }
.overlay-search {
  width: min(420px, 90vw);
}
.overlay-search input {
  width: 100%;
  padding: 0.75rem 1.25rem;
  background: var(--c-sand-dim);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-btn);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
}
.overlay-search input:focus { border-color: var(--c-mint); }
.overlay-menu nav ol {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.overlay-menu nav ol li a {
  display: block;
  padding: 0.6rem 2rem;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--c-text);
  border-radius: var(--radius-btn);
  transition: background var(--transition), color var(--transition);
  min-height: 44px;
  line-height: 1.4;
}
.overlay-menu nav ol li a:hover {
  background: var(--c-mint-dim);
  color: var(--c-mint);
}

/* ── Hero 首页 ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--c-dark2) 0%, var(--c-dark) 60%);
}
.hero-text {
  position: relative;
  z-index: 2;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 5rem 1.5rem 2.5rem;
  gap: 1.25rem;
}
.hero-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-mint);
  font-weight: 500;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-text);
  max-width: 780px;
}
.hero-lead {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  max-width: 560px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 2rem;
  background: var(--c-mint);
  color: var(--c-dark);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-btn);
  transition: background var(--transition), transform var(--transition);
  min-height: 44px;
}
.btn-primary:hover { background: #4db39f; color: var(--c-dark); transform: translateY(-2px); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 2rem;
  border: 1.5px solid var(--c-mint);
  color: var(--c-mint);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-btn);
  transition: background var(--transition), transform var(--transition);
  min-height: 44px;
}
.btn-ghost:hover { background: var(--c-mint-dim); transform: translateY(-2px); }
.hero-media {
  position: relative;
  flex: 1 1 auto;
  overflow: hidden;
  min-height: 260px;
}
.hero-bg-word {
  position: absolute;
  bottom: -0.1em;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(6rem, 22vw, 18rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(92,198,176,0.07);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  line-height: 1;
  z-index: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.55) saturate(0.7);
}
.hero-grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.06'/%3E%3C/svg%3E");
  background-size: 200px;
  opacity: 0.55;
}

/* ── 文章/关于/隐私 Hero ── */
.article-hero-bar,
.about-hero,
.privacy-hero,
.default-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-dark2), var(--c-dark));
  padding: 5rem 1.5rem 3.5rem;
  text-align: center;
}
.article-hero-bar { min-height: 38vh; display: flex; align-items: flex-end; justify-content: center; }
.about-hero, .privacy-hero { min-height: 32vh; display: flex; align-items: center; justify-content: center; }
.default-hero { min-height: 28vh; display: flex; align-items: center; justify-content: center; }
.article-hero-content,
.about-hero-content,
.privacy-hero-content,
.default-hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  width: 100%;
}
.article-hero-bg-num,
.about-hero-bg-word,
.privacy-hero-bg-word {
  position: absolute;
  bottom: -0.1em;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(5rem, 18vw, 14rem);
  font-weight: 700;
  color: rgba(92,198,176,0.06);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.03em;
  line-height: 1;
  z-index: 0;
}
.article-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.35) saturate(0.5);
  z-index: 0;
}
.article-hero-grain,
.about-hero-grain,
.privacy-hero-grain {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.06'/%3E%3C/svg%3E");
  background-size: 200px;
  opacity: 0.45;
}
.article-eyebrow,
.about-eyebrow,
.privacy-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-mint);
  margin-bottom: 0.75rem;
}
.article-eyebrow a { color: var(--c-mint); }
.article-hero-bar h1,
.about-hero h1,
.privacy-hero h1,
.default-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}
.article-meta {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}
.pub-date, .mod-date {
  font-size: 0.82rem;
  color: var(--c-text-muted);
}

/* ── 主内容布局 ── */
main { padding: 3rem 0 2rem; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 1.25rem; }

.content-section {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* ── Aside 侧栏 ── */
.sidebar {
  position: sticky;
  top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.sidebar h2 {
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-mint);
  font-weight: 600;
  margin-bottom: 0.1rem;
}
.sidebar .subtitle,
.sidebar p.subtitle {
  font-size: 0.8rem;
  color: var(--c-text-muted);
  margin-bottom: 0.75rem;
}
.sidebar nav ol {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.sidebar nav ol li a {
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.88rem;
  color: var(--c-text-muted);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  line-height: 1.4;
  display: flex;
  align-items: center;
}
.sidebar nav ol li a:hover {
  background: var(--c-mint-dim);
  color: var(--c-mint);
}
.sidebar-related {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.sidebar-related h2 {
  margin-top: 0.5rem;
}

/* ── 正文 prose ── */
.main-content { min-width: 0; }
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}
.prose h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-sand);
  margin: 2.5rem 0 0.5rem;
  line-height: 1.3;
}
.prose h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-mint);
  margin: 1.75rem 0 0.4rem;
}
.prose p { margin: 0.9rem 0; }
.prose a { color: var(--c-mint); border-bottom: 1px solid var(--c-mint-dim); }
.prose a:hover { color: var(--c-sand); }
.prose ul, .prose ol {
  margin: 0.9rem 0;
  padding-left: 1.5rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin: 0.3rem 0; }
.prose blockquote {
  border-left: 3px solid var(--c-mint);
  padding: 0.75rem 1.25rem;
  margin: 1.25rem 0;
  background: var(--c-sand-dim);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--c-text-muted);
  font-style: italic;
}
.prose strong { color: var(--c-sand); font-weight: 600; }
.prose code {
  background: var(--c-dark3);
  padding: 0.15em 0.45em;
  border-radius: 5px;
  font-size: 0.9em;
}
.prose pre {
  background: var(--c-dark3);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.25rem 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.93rem;
}
.prose th, .prose td {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--c-dark3);
  text-align: left;
}
.prose th { background: var(--c-dark3); color: var(--c-sand); font-weight: 600; }
.prose img { border-radius: var(--radius-sm); margin: 1.25rem 0; }

/* ── 子页卡片 ── */
.child-grid { margin-top: 3rem; }
.child-grid h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-sand);
  margin-bottom: 0.4rem;
}
.child-grid .subtitle {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  margin-bottom: 1.5rem;
}
.card-block {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.child-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  color: var(--c-text);
  transition: transform var(--transition), box-shadow var(--transition);
}
.child-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(23,38,35,0.65);
  color: var(--c-text);
}
.child-card strong {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-sand);
  line-height: 1.4;
}
.child-card .card-desc {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.55;
}
.child-card .card-date {
  font-size: 0.78rem;
  color: var(--c-mint);
  margin-top: auto;
}

/* ── 相关链接卡片（aside 与文章底部） ── */
.rel-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-sm);
  color: var(--c-text);
  transition: background var(--transition), transform var(--transition);
}
.rel-link:hover {
  background: var(--c-mint-dim);
  transform: translateX(3px);
  color: var(--c-text);
}
.rel-link strong {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-sand);
  line-height: 1.35;
}
.rel-link span {
  font-size: 0.78rem;
  color: var(--c-text-muted);
}

/* ── 文章底部导航 ── */
.article-footer-nav,
.about-contact .about-links,
.privacy-footer-nav,
.default-footer-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-dark3);
}
.article-footer-nav a,
.privacy-footer-nav a,
.default-footer-nav a {
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-btn);
  font-size: 0.88rem;
  color: var(--c-text-muted);
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.article-footer-nav a:hover,
.privacy-footer-nav a:hover,
.default-footer-nav a:hover {
  background: var(--c-mint-dim);
  color: var(--c-mint);
}
.about-contact { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--c-dark3); }
.about-contact h2 { font-size: 1.15rem; font-weight: 600; color: var(--c-sand); margin-bottom: 0.3rem; }
.about-contact .subtitle { font-size: 0.85rem; color: var(--c-text-muted); margin-bottom: 1rem; }
.about-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.about-links a {
  padding: 0.55rem 1.25rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-btn);
  font-size: 0.88rem;
  color: var(--c-text-muted);
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.about-links a:hover { background: var(--c-mint-dim); color: var(--c-mint); }
.about-aside-cards { display: flex; flex-direction: column; gap: 0.65rem; margin-top: 0.5rem; }
.privacy-note {
  padding: 1rem 1.1rem;
  margin-top: 0.5rem;
}
.privacy-note strong { display: block; color: var(--c-sand); font-size: 0.88rem; margin-bottom: 0.4rem; }
.privacy-note p { font-size: 0.82rem; color: var(--c-text-muted); line-height: 1.55; }

/* ── h2 + subtitle 标题模式 ── */
.main-content h2,
.prose h2 { /* handled above */ }
p.subtitle, .subtitle {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  margin-top: -0.25rem;
  margin-bottom: 1rem;
}

/* ── 页脚 ── */
footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-dark3);
  padding: 3rem 1.25rem 2rem;
  max-width: 100%;
}
footer > div { max-width: 1120px; margin: 0 auto; }
footer > div + div { margin-top: 1.75rem; }
.footer-brand .footer-logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-mint);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}
.footer-brand p { font-size: 0.88rem; color: var(--c-text-muted); line-height: 1.6; max-width: 440px; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
}
.footer-links nav ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}
.footer-links nav ol li a {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  min-height: 40px;
  display: flex;
  align-items: center;
  padding: 0.25rem 0.1rem;
  transition: color var(--transition);
}
.footer-links nav ol li a:hover { color: var(--c-mint); }
.footer-extra {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-extra a {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}
.footer-extra a:hover { color: var(--c-mint); }
.footer-copy {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-dark3);
  margin-top: 0.5rem;
}
.footer-copy p { font-size: 0.8rem; color: var(--c-text-muted); }

/* ── 底部固定导航条 ── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bn-h);
  background: rgba(23,38,35,0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--c-dark3);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 100;
  padding: 0 0.5rem;
}
.bottom-nav a,
.bottom-nav button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  flex: 1;
  min-height: 44px;
  padding: 0.4rem 0.25rem;
  font-size: 0.68rem;
  color: var(--c-text-muted);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.02em;
}
.bottom-nav a:hover,
.bottom-nav button:hover {
  color: var(--c-mint);
  background: var(--c-mint-dim);
}
.bn-icon { font-size: 1.1rem; line-height: 1; }
.bn-brand {
  background: var(--c-mint) !important;
  color: var(--c-dark) !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 700;
  flex: 1.2;
}
.bn-brand:hover {
  background: #4db39f !important;
  color: var(--c-dark) !important;
}
.bn-logo {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.2;
}

/* ── 滚动揭示动效 ── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── 响应式 ── */
@media (max-width: 768px) {
  body { font-size: 16px; }
  .content-section {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    order: 2;
  }
  .main-content { order: 1; }
  .article-layout .sidebar,
  .about-layout .sidebar,
  .privacy-layout .sidebar {
    order: 2;
    border-top: 1px solid var(--c-dark3);
    padding-top: 1.5rem;
  }
  .hero-text { padding-top: 4rem; }
  .hero h1 { font-size: clamp(1.7rem, 7vw, 2.4rem); }
  .card-block { grid-template-columns: 1fr; }
  .footer-links { flex-direction: column; gap: 1rem; }
  .article-hero-bar { min-height: 44vh; padding: 3.5rem 1.25rem 2.5rem; align-items: flex-end; }
  .about-hero, .privacy-hero { min-height: 36vh; padding: 3.5rem 1.25rem 2rem; }
}

@media (max-width: 480px) {
  .wrap { padding: 0 1rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { text-align: center; justify-content: center; }
  main { padding: 2rem 0 1.5rem; }
}

/* ── prefers-reduced-motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}