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

/* ===== CSS 变量 ===== */
:root {
  --mint: #b4fde1;
  --sky: #add8e6;
  --dark: #172620;
  --mint-dim: #8ef5cc;
  --sky-dim: #85c4d8;
  --dark-mid: #1e3530;
  --dark-light: #264038;
  --white: #f8fffe;
  --text-main: #e8faf4;
  --text-sub: #a8c8bc;
  --text-dark: #172620;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --border-w: 3px;
  --shadow-clay: 4px 4px 12px rgba(0,0,0,0.35), inset -2px -2px 8px rgba(0,0,0,0.2);
  --shadow-clay-hover: 6px 6px 18px rgba(0,0,0,0.45), inset -2px -2px 8px rgba(0,0,0,0.15);
  --shadow-btn: 3px 3px 0px rgba(0,0,0,0.4), inset -1px -1px 4px rgba(0,0,0,0.15);
  --shadow-btn-press: 1px 1px 0px rgba(0,0,0,0.4), inset 1px 1px 4px rgba(0,0,0,0.2);
  --transition-std: 200ms ease-out;
  --transition-bounce: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-main: 'Figtree', 'Noto Sans', system-ui, sans-serif;
  --max-w: 1200px;
  --content-w: 780px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--dark);
  color: var(--text-main);
  font-size: 17px;
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--mint); text-decoration: none; }
a:hover { color: var(--mint-dim); }
ul, ol { list-style: none; }
dl { margin: 0; }

/* ===== 公告条 ===== */
.announce-bar {
  background: linear-gradient(90deg, var(--mint), var(--sky));
  color: var(--dark);
  text-align: center;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.announce-bar__text {}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(23, 38, 32, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: var(--border-w) solid var(--dark-light);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--mint), var(--sky));
  border-radius: var(--radius-sm);
  border: var(--border-w) solid var(--mint-dim);
  box-shadow: var(--shadow-btn);
  flex-shrink: 0;
  color: var(--dark);
  font-weight: 700;
  font-size: 14px;
  transition: transform var(--transition-bounce), box-shadow var(--transition-std);
}
.brand-mark:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--shadow-btn-press);
  color: var(--dark);
}
.brand-mark__text { font-size: 12px; font-weight: 700; color: var(--dark); line-height: 1; }
.brand-mark__img { width: 28px; height: 28px; object-fit: contain; }

.breadcrumb-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-sub);
  flex: 1;
  overflow: hidden;
}
.bc-link { color: var(--sky); font-weight: 500; white-space: nowrap; }
.bc-link:hover { color: var(--mint); }
.bc-sep { color: var(--text-sub); }
.bc-cur { color: var(--text-main); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ===== 汉堡按钮 ===== */
.burger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--dark-light);
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  margin-left: auto;
  transition: transform var(--transition-bounce);
  flex-shrink: 0;
}
.burger-btn:hover { transform: scale(1.08); }
.burger-btn__line {
  width: 100%;
  height: 2px;
  background: var(--mint);
  border-radius: 2px;
  transition: transform var(--transition-std), opacity var(--transition-std);
}

/* ===== 全屏遮罩菜单 ===== */
.fullscreen-nav {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(18, 30, 24, 0.97);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease;
}
.fullscreen-nav.is-open {
  opacity: 1;
  pointer-events: all;
}
.fullscreen-nav__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background: var(--dark-light);
  border: var(--border-w) solid var(--mint);
  border-radius: var(--radius-sm);
  color: var(--mint);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-btn);
  transition: transform var(--transition-bounce);
}
.fullscreen-nav__close:hover { transform: rotate(90deg) scale(1.1); }
.fullscreen-nav__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 480px;
  padding: 20px;
}
.fullscreen-nav__label {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-sub);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.nav-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 300ms ease calc(var(--i, 0) * 60ms), transform 300ms ease calc(var(--i, 0) * 60ms);
}
.fullscreen-nav.is-open .nav-item {
  opacity: 1;
  transform: translateY(0);
}
.nav-link {
  display: block;
  padding: 14px 20px;
  background: var(--dark-light);
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 17px;
  font-weight: 500;
  box-shadow: var(--shadow-clay);
  transition: transform var(--transition-bounce), background var(--transition-std), box-shadow var(--transition-std);
}
.nav-link:hover {
  background: var(--mint);
  color: var(--dark);
  transform: translateX(8px);
  box-shadow: var(--shadow-clay-hover);
}
.nav-link--active {
  background: linear-gradient(135deg, var(--mint), var(--sky));
  color: var(--dark);
  border-color: var(--mint-dim);
}

/* ===== 二级粘性锚点条 ===== */
.sticky-anchor {
  position: sticky;
  top: 64px;
  z-index: 90;
  background: var(--dark-mid);
  border-bottom: 2px solid var(--dark-light);
  overflow-x: auto;
  scrollbar-width: none;
}
.sticky-anchor::-webkit-scrollbar { display: none; }
.anchor-inner {
  display: flex;
  gap: 4px;
  padding: 8px 20px;
  max-width: var(--max-w);
  margin: 0 auto;
  min-width: max-content;
}
.anchor-link {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-sub);
  border: 2px solid transparent;
  transition: all var(--transition-std);
  white-space: nowrap;
  min-height: 34px;
}
.anchor-link:hover, .anchor-link--active {
  background: var(--dark-light);
  color: var(--mint);
  border-color: var(--mint);
}

/* ===== 主体布局 ===== */
.page-main {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 20px 64px;
  align-items: start;
}
.page-main--channel,
.page-main--article,
.page-main--info {
  grid-template-columns: 1fr 280px;
}

/* ===== 正文容器结构：main > div > section ===== */
.page-article {
  min-width: 0;
}
.page-article section {
  margin-bottom: 48px;
}

/* ===== 侧边栏 ===== */
.site-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 128px;
}
.aside-block {
  padding: 20px;
}
.aside-block--accent {
  background: linear-gradient(135deg, rgba(180,253,225,0.1), rgba(173,216,230,0.1));
  border-color: var(--sky);
}
.aside-block--mint {
  background: linear-gradient(135deg, rgba(180,253,225,0.12), rgba(23,38,32,0.5));
  border-color: var(--mint);
}
.aside-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.aside-title span { display: inline; }
.aside-nav { display: flex; flex-direction: column; gap: 4px; }
.aside-nav dt { font-size: 11px; color: var(--text-sub); font-weight: 600; margin-bottom: 4px; letter-spacing: 0.1em; }
.aside-nav dd { margin: 0; }
.aside-link {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-sub);
  transition: background var(--transition-std), color var(--transition-std), transform var(--transition-bounce);
  min-height: 36px;
  display: flex;
  align-items: center;
}
.aside-link:hover {
  background: var(--dark-light);
  color: var(--mint);
  transform: translateX(4px);
}
.aside-link--cur { color: var(--mint); background: var(--dark-light); }
.aside-tip { font-size: 13px; color: var(--text-sub); margin-bottom: 12px; line-height: 1.6; }

/* ===== Clay 卡片 ===== */
.clay-card {
  background: var(--dark-light);
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-clay);
  transition: transform var(--transition-bounce), box-shadow var(--transition-std);
}
.clay-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-clay-hover);
}

/* ===== 按钮 ===== */
.btn-clay {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--mint), var(--sky));
  color: var(--dark);
  font-weight: 700;
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: var(--border-w) solid var(--mint-dim);
  box-shadow: var(--shadow-btn);
  cursor: pointer;
  transition: transform var(--transition-bounce), box-shadow var(--transition-std), background var(--transition-std);
  min-height: 44px;
  text-decoration: none;
  white-space: nowrap;
}
.btn-clay:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: var(--shadow-clay-hover);
  color: var(--dark);
}
.btn-clay:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-btn-press);
}
.btn-clay--sm {
  padding: 8px 16px;
  font-size: 13px;
  min-height: 36px;
}
.btn-clay--hero {
  padding: 14px 32px;
  font-size: 17px;
  min-height: 52px;
}

/* ===== Hero（首页） ===== */
.hero-section {
  position: relative;
  height: 45vh;
  min-height: 320px;
  max-height: 520px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 48px;
  border: var(--border-w) solid var(--dark-light);
  box-shadow: var(--shadow-clay);
}
.hero-media { position: absolute; inset: 0; }
.hero__bg-img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(23,38,32,0.3) 0%, rgba(23,38,32,0.75) 100%);
}
.hero-bg-num {
  position: absolute;
  bottom: -20px;
  left: -10px;
  font-size: clamp(120px, 20vw, 220px);
  font-weight: 700;
  color: rgba(180,253,225,0.06);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}
.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  padding: 32px 40px;
  text-align: right;
}
.hero-content--right { align-items: flex-end; }
.hero-eyebrow {
  display: inline-block;
  padding: 4px 14px;
  background: var(--mint);
  color: var(--dark);
  font-size: 12px;
  font-weight: 700;
  border-radius: 20px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.hero-h1 {
  font-size: clamp(26px, 4vw, 48px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 12px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  max-width: 600px;
}
.hero-sub {
  font-size: 15px;
  color: rgba(248,255,254,0.85);
  max-width: 420px;
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ===== 章节标题 ===== */
.content-section {}
.section-header { margin-bottom: 24px; }
.section-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title span { display: inline; }
.section-title::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 28px;
  background: linear-gradient(180deg, var(--mint), var(--sky));
  border-radius: 3px;
  flex-shrink: 0;
}
.section-sub { font-size: 14px; color: var(--text-sub); }

/* ===== 频道卡片网格 ===== */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.ch-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.ch-card__num {
  position: absolute;
  top: -8px;
  right: 12px;
  font-size: 56px;
  font-weight: 700;
  color: rgba(180,253,225,0.08);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.ch-card__body { position: relative; z-index: 1; }
.ch-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 8px;
  line-height: 1.3;
}
.ch-card__title span { display: inline; }
.ch-card__desc { font-size: 14px; color: var(--text-sub); margin-bottom: 16px; line-height: 1.6; }

/* ===== 精选文章列表 ===== */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.feat-item {
  padding: 20px;
  background: var(--dark-light);
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-clay);
  transition: transform var(--transition-bounce), box-shadow var(--transition-std);
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 400ms ease calc(var(--fi, 0) * 80ms) forwards;
}
.feat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-clay-hover);
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.feat-item__tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--sky);
  color: var(--dark);
  font-size: 11px;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 8px;
  letter-spacing: 0.08em;
}
.feat-item__link { display: block; text-decoration: none; }
.feat-item__link h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.4;
  transition: color var(--transition-std);
}
.feat-item__link h4 span { display: inline; }
.feat-item__link:hover h4 { color: var(--mint); }
.feat-item__date { font-size: 12px; color: var(--text-sub); display: block; margin-bottom: 8px; }
.feat-item__desc { font-size: 13px; color: var(--text-sub); line-height: 1.5; }

/* ===== 正文 prose ===== */
.prose-wrap {
  max-width: var(--content-w);
  color: var(--text-main);
  font-size: 17px;
  line-height: 1.8;
}
.prose-wrap h2, .prose-wrap h3 {
  color: var(--mint);
  margin: 28px 0 12px;
  font-weight: 700;
}
.prose-wrap h2 { font-size: 22px; }
.prose-wrap h3 { font-size: 18px; color: var(--sky); }
.prose-wrap p { margin-bottom: 16px; }
.prose-wrap a { color: var(--sky); border-bottom: 1px dashed var(--sky-dim); }
.prose-wrap a:hover { color: var(--mint); border-bottom-color: var(--mint); }
.prose-wrap ul, .prose-wrap ol { padding-left: 24px; margin-bottom: 16px; }
.prose-wrap li { margin-bottom: 6px; }
.prose-wrap ul li { list-style: disc; }
.prose-wrap ol li { list-style: decimal; }
.prose-wrap strong { color: var(--mint); font-weight: 700; }
.prose-wrap blockquote {
  border-left: 4px solid var(--mint);
  padding: 12px 20px;
  background: var(--dark-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--text-sub);
}
.prose-wrap--legal { font-size: 16px; }

/* ===== 频道 Hero ===== */
.channel-hero {
  position: relative;
  padding: 48px 40px;
  background: linear-gradient(135deg, var(--dark-light), var(--dark-mid));
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 0;
  box-shadow: var(--shadow-clay);
}
.channel-hero__bg-num {
  position: absolute;
  bottom: -30px;
  right: -20px;
  font-size: clamp(80px, 15vw, 160px);
  font-weight: 700;
  color: rgba(180,253,225,0.05);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}
.channel-hero__content { position: relative; z-index: 1; }
.channel-hero__tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--sky);
  color: var(--dark);
  font-size: 11px;
  font-weight: 700;
  border-radius: 20px;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.channel-hero__h1 {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 10px;
}
.channel-hero__date {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 10px;
}
.channel-hero__desc {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 540px;
  line-height: 1.7;
}

/* ===== 子页卡片 ===== */
.children-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.child-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 350ms ease calc(var(--card-i, 0) * 70ms) forwards;
}
.child-card__index {
  position: absolute;
  top: -8px;
  right: 12px;
  font-size: 52px;
  font-weight: 700;
  color: rgba(173,216,230,0.07);
  pointer-events: none;
  user-select: none;
}
.child-card__body { position: relative; z-index: 1; }
.child-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}
.child-card__title span { display: inline; }
.child-card__desc { font-size: 14px; color: var(--text-sub); margin-bottom: 10px; line-height: 1.5; }
.child-card__date { display: block; font-size: 12px; color: var(--text-sub); margin-bottom: 14px; }

/* ===== 文章 Hero ===== */
.article-hero {
  position: relative;
  height: 280px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
  border: var(--border-w) solid var(--dark-mid);
  box-shadow: var(--shadow-clay);
}
.article-hero__img { width: 100%; height: 100%; object-fit: cover; }
.article-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(23,38,32,0.8) 0%, transparent 60%);
}

.article-title-section { margin-bottom: 32px; }
.article-channel-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--dark-light);
  border: 2px solid var(--sky);
  color: var(--sky);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
  transition: background var(--transition-std), color var(--transition-std);
}
.article-channel-tag:hover { background: var(--sky); color: var(--dark); }
.article-h1 {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 12px;
}
.article-meta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.article-date {
  font-size: 13px;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 4px;
}
.article-date::before { content: '📅'; font-size: 11px; }
.article-date--mod { color: var(--sky-dim); }
.article-date--mod::before { content: '🔄'; }
.article-prose { max-width: 100%; }

/* ===== 相关文章 ===== */
.siblings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.sib-card {
  padding: 18px;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeUp 350ms ease calc(var(--card-i, 0) * 60ms) forwards;
}
.sib-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}
.sib-card__title span { display: inline; }
.sib-card time { display: block; font-size: 12px; color: var(--text-sub); margin-bottom: 12px; }

/* ===== info hero（about/privacy） ===== */
.info-hero {
  position: relative;
  padding: 48px 40px;
  background: linear-gradient(135deg, var(--dark-light), rgba(23,38,32,0.6));
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 0;
  box-shadow: var(--shadow-clay);
}
.info-hero--privacy {
  background: linear-gradient(135deg, rgba(173,216,230,0.08), rgba(23,38,32,0.7));
  border-color: var(--sky);
}
.info-hero__bg-num {
  position: absolute;
  bottom: -20px;
  right: 0;
  font-size: clamp(60px, 12vw, 130px);
  font-weight: 700;
  color: rgba(180,253,225,0.04);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.info-hero__h1 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.info-hero__date {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  position: relative;
  z-index: 1;
}

/* ===== about 导航卡片 ===== */
.about-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.about-nav-card {
  padding: 20px;
}
.about-nav-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 8px;
}
.about-nav-card h3 span { display: inline; }
.about-nav-card p { font-size: 13px; color: var(--text-sub); margin-bottom: 14px; line-height: 1.5; }

/* ===== privacy info-link ===== */
.info-links-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.info-link-card { padding: 20px; }
.info-link-card h3 { font-size: 16px; font-weight: 700; color: var(--sky); margin-bottom: 8px; }
.info-link-card h3 span { display: inline; }
.info-link-card p { font-size: 13px; color: var(--text-sub); margin-bottom: 14px; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark-mid);
  border-top: var(--border-w) solid var(--dark-light);
  margin-top: 48px;
}
.footer-top {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 20px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  border-bottom: 2px solid var(--dark-light);
}
.footer-brand strong { font-size: 20px; color: var(--mint); display: block; margin-bottom: 8px; }
.footer-brand p { font-size: 14px; color: var(--text-sub); line-height: 1.6; max-width: 320px; }
.footer-newsletter h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.subscribe-form { display: flex; gap: 8px; flex-wrap: wrap; }
.subscribe-input {
  flex: 1;
  min-width: 180px;
  padding: 10px 16px;
  background: var(--dark-light);
  border: var(--border-w) solid var(--dark-mid);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 14px;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition-std);
  min-height: 44px;
}
.subscribe-input:focus { border-color: var(--mint); }
.subscribe-input::placeholder { color: var(--text-sub); }

.footer-nav-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 20px;
  border-bottom: 2px solid var(--dark-light);
}
.footer-nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer-dl {}
.footer-dl__title {
  font-size: 12px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  display: block;
}
.footer-dl dd { margin: 0; }
.footer-dl dd + dd { margin-top: 6px; }
.footer-dl a {
  font-size: 14px;
  color: var(--text-sub);
  display: block;
  padding: 4px 0;
  transition: color var(--transition-std), transform var(--transition-bounce);
  min-height: 30px;
  display: flex;
  align-items: center;
}
.footer-dl a:hover { color: var(--mint); transform: translateX(4px); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 20px;
}
.footer-copy { font-size: 13px; color: var(--text-sub); text-align: center; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .page-main,
  .page-main--channel,
  .page-main--article,
  .page-main--info {
    grid-template-columns: 1fr;
  }
  .site-aside { position: static; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .channels-grid, .featured-grid, .children-grid, .siblings-grid { grid-template-columns: 1fr 1fr; }
  .about-nav-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .header-inner { height: 56px; gap: 10px; }
  .breadcrumb-bar { display: none; }
  .hero-section { height: 40vh; min-height: 280px; }
  .hero-content { padding: 20px; }
  .hero-h1 { font-size: 22px; }
  .hero-sub { font-size: 14px; display: none; }
  .channel-hero, .info-hero { padding: 28px 20px; }
  .channel-hero__h1, .info-hero__h1 { font-size: 22px; }
  .channels-grid, .featured-grid, .children-grid, .siblings-grid { grid-template-columns: 1fr; }
  .about-nav-grid { grid-template-columns: 1fr; }
  .info-links-row { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .page-main { padding: 20px 16px 48px; gap: 24px; }
  .article-h1 { font-size: 22px; }
  .section-title { font-size: 18px; }
  .prose-wrap { font-size: 16px; }
  .fullscreen-nav__list { padding: 60px 16px 20px; }
  .anchor-inner { padding: 8px 12px; }
}

/* ===== 减少动画（无障碍） ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .clay-card:hover { transform: none; }
  .btn-clay:hover { transform: none; }
  .nav-link:hover { transform: none; }
}