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

/* ===== 基础重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== CSS 变量 ===== */
:root {
  --bg: #fdfbf7;
  --bg2: #f5f5f5;
  --ink: #1a1a1a;
  --ink2: #3a3a3a;
  --ink3: #6a6a6a;
  --border: #d8d5cf;
  --border2: #e8e5e0;
  --accent: #1a1a1a;
  --accent-hover: #3a3a3a;
  --radius: 18px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 1200px;
  --header-h: 64px;
  --anchor-h: 44px;
}

html {
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  position: relative;
}

/* 纸质纹理噪点叠层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

/* ===== 排版基础 ===== */
h1, h2, h3, h4 {
  font-family: var(--font);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
h2 { font-size: clamp(1.2rem, 2.5vw, 1.7rem); }
h3 { font-size: 1.1rem; font-weight: 500; }
h4 { font-size: 1rem; font-weight: 500; }

p { font-size: 1rem; line-height: 1.7; color: var(--ink2); }

a {
  color: var(--ink);
  text-decoration: none;
  transition: none;
}

a:hover { color: var(--ink3); }

img { display: block; max-width: 100%; height: auto; }

time { font-size: 0.82rem; color: var(--ink3); font-weight: 300; }

small.eyebrow {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink3);
  margin-bottom: 0.3rem;
}

/* ===== 页面骨架 ===== */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.brand-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.main-nav {
  flex: 1;
  overflow: hidden;
}

.main-nav p {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.25rem;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0.25rem 0;
}

.main-nav p::-webkit-scrollbar { display: none; }

.main-nav p a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink2);
  border: 1px solid var(--border2);
  border-radius: 999px;
  white-space: nowrap;
  min-height: 40px;
  line-height: 1;
  display: flex;
  align-items: center;
}

.main-nav p a:hover,
.main-nav p a.active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.cta-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.1rem;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 999px;
  min-height: 40px;
  white-space: nowrap;
  border: 1px solid var(--ink);
}

.cta-btn:hover {
  background: var(--ink2);
  color: var(--bg);
}

/* ===== 锚点栏 ===== */
.anchor-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 190;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  height: var(--anchor-h);
}

.anchor-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.anchor-inner::-webkit-scrollbar { display: none; }

.anchor-inner a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ink3);
  white-space: nowrap;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.anchor-inner a:hover,
.anchor-inner a.cur {
  color: var(--ink);
  background: var(--border2);
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--ink);
  min-height: 44px;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--ink2);
  color: var(--bg);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid var(--border);
  min-height: 44px;
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--ink);
  background: var(--bg2);
}

/* ===== Hero（首页） ===== */
.hero-block {
  position: relative;
  min-height: 45vh;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg-text {
  position: absolute;
  right: -0.1em;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(8rem, 20vw, 18rem);
  font-weight: 600;
  color: var(--border);
  letter-spacing: -0.05em;
  pointer-events: none;
  line-height: 1;
  user-select: none;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
  width: 100%;
  display: flex;
  justify-content: flex-end;
}

.hero-text {
  max-width: 560px;
  text-align: right;
}

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink3);
  margin-bottom: 0.5rem;
}

.hero-h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.hero-sub {
  font-size: 0.95rem;
  color: var(--ink2);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.hero-arc {
  position: absolute;
  bottom: -30px;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

/* ===== 通用内容区 ===== */
main {
  flex: 1;
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== 侧边栏共用 ===== */
.aside-inner {
  position: sticky;
  top: calc(var(--header-h) + var(--anchor-h) + 1.5rem);
  padding: 1.25rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.aside-inner h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.aside-inner a {
  font-size: 0.82rem;
  color: var(--ink2);
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border2);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-inner a:hover { color: var(--ink); }

.aside-inner a.active { color: var(--ink); font-weight: 600; }

.aside-divider {
  height: 1px;
  background: var(--border);
  margin: 0.5rem 0;
}

.aside-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  background: var(--ink);
  color: var(--bg) !important;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  border: none !important;
  margin-top: 0.5rem;
  min-height: 40px;
  text-align: center;
}

.aside-related {
  display: flex;
  flex-direction: column;
}

.aside-related a {
  font-size: 0.8rem;
}

/* ===== section-block 共用 ===== */
.section-block {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.section-block h2 {
  margin-bottom: 1.25rem;
}

/* ===== 首页布局 ===== */
.home-content {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.home-aside {
  /* aside 在左侧 */
}

.home-main {}

.home-content-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink2);
}

.home-content-text p { margin-bottom: 1rem; }
.home-content-text h2 { margin: 1.5rem 0 0.75rem; }
.home-content-text h3 { margin: 1.25rem 0 0.5rem; }
.home-content-text ul, .home-content-text ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.home-content-text li { margin-bottom: 0.4rem; }
.home-content-text a { text-decoration: underline; text-underline-offset: 2px; }

/* 频道卡片网格 */
.ch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.ch-card {
  background: var(--bg2);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border2);
}

.ch-card-head h3 {
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.ch-card-head h3 a {
  color: var(--ink);
  font-weight: 600;
}

.ch-card-head h3 a:hover { color: var(--ink3); }

.ch-desc {
  font-size: 0.8rem;
  color: var(--ink3);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.ch-card-links {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.ch-card-links a {
  font-size: 0.8rem;
  color: var(--ink2);
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--border2);
}

.ch-card-links a:last-child { border-bottom: none; }
.ch-card-links a:hover { color: var(--ink); }

/* 文章列表 */
.art-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.art-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border2);
  align-items: start;
}

.art-row:first-child { border-top: 1px solid var(--border2); }

.art-row-meta {
  padding-top: 0.2rem;
}

.art-row-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  display: block;
  margin-bottom: 0.3rem;
}

.art-row-title:hover { color: var(--ink3); }

.art-row-desc {
  font-size: 0.82rem;
  color: var(--ink3);
  line-height: 1.5;
}

/* ===== 频道页布局 ===== */
.channel-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.channel-hero {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.channel-desc {
  font-size: 0.95rem;
  color: var(--ink2);
  margin-top: 0.5rem;
  line-height: 1.7;
}

.page-date {
  margin-top: 0.5rem;
  display: inline-block;
}

.channel-content-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink2);
}

.channel-content-text p { margin-bottom: 1rem; }
.channel-content-text h2 { margin: 1.5rem 0 0.75rem; }
.channel-content-text h3 { margin: 1.25rem 0 0.5rem; }
.channel-content-text ul, .channel-content-text ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.channel-content-text li { margin-bottom: 0.4rem; }
.channel-content-text a { text-decoration: underline; text-underline-offset: 2px; }

/* 子页卡片 */
.child-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.child-card {
  display: block;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border2);
}

.child-card:first-child { border-top: 1px solid var(--border2); }

.child-card strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

.child-card:hover strong { color: var(--ink3); }

.child-card-desc {
  display: block;
  font-size: 0.82rem;
  color: var(--ink3);
  line-height: 1.5;
}

.child-card-date {
  display: block;
  margin-top: 0.25rem;
}

.channel-breadcrumb {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--ink3);
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.channel-breadcrumb a { color: var(--ink3); }
.channel-breadcrumb a:hover { color: var(--ink); }

/* ===== 文章页布局 ===== */
.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.article-breadcrumb {
  font-size: 0.8rem;
  color: var(--ink3);
  display: flex;
  gap: 0.3rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.article-breadcrumb a { color: var(--ink3); }
.article-breadcrumb a:hover { color: var(--ink); }

.article-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.article-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.article-hero-wrap {
  margin-bottom: 1.5rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border2);
}

.article-hero-img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink2);
  max-width: 72ch;
}

.article-body p { margin-bottom: 1.1rem; }
.article-body h2 { margin: 2rem 0 0.75rem; font-size: 1.25rem; }
.article-body h3 { margin: 1.5rem 0 0.5rem; font-size: 1.05rem; }
.article-body ul, .article-body ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.article-body li { margin-bottom: 0.5rem; }
.article-body a { text-decoration: underline; text-underline-offset: 2px; color: var(--ink); }
.article-body a:hover { color: var(--ink3); }
.article-body blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--ink3);
  margin: 1rem 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.article-body th, .article-body td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}
.article-body th { background: var(--bg2); font-weight: 600; }

/* 相关文章 */
.related-block {}

.related-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.related-link {
  display: block;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border2);
}

.related-link:first-child { border-top: 1px solid var(--border2); }

.related-link strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
}

.related-link:hover strong { color: var(--ink3); }

.article-footer-nav {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.back-link {
  font-size: 0.85rem;
  color: var(--ink2);
  flex: 1;
  min-width: 160px;
}

.back-link:hover { color: var(--ink); }

/* ===== 关于页布局 ===== */
.about-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.about-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.about-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink2);
}

.about-body p { margin-bottom: 1rem; }
.about-body h2 { margin: 1.5rem 0 0.75rem; }
.about-body h3 { margin: 1.25rem 0 0.5rem; }
.about-body ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.about-body li { margin-bottom: 0.4rem; }
.about-body a { text-decoration: underline; text-underline-offset: 2px; }

.about-channels {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.about-channels h2 { margin-bottom: 1rem; }

.about-channel-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.about-ch-link {
  display: block;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border2);
}

.about-ch-link:first-child { border-top: 1px solid var(--border2); }

.about-ch-link strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

.about-ch-link span {
  font-size: 0.82rem;
  color: var(--ink3);
}

.about-ch-link:hover strong { color: var(--ink3); }

.about-links {
  margin-top: 2rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ===== 隐私页布局 ===== */
.privacy-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.privacy-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.privacy-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink2);
}

.privacy-body p { margin-bottom: 1rem; }
.privacy-body h2 { margin: 1.5rem 0 0.75rem; }
.privacy-body h3 { margin: 1.25rem 0 0.5rem; }
.privacy-body ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.privacy-body li { margin-bottom: 0.4rem; }
.privacy-body a { text-decoration: underline; text-underline-offset: 2px; }

.privacy-footer-nav {
  margin-top: 2rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer-cta-block {
  background: var(--ink);
  color: var(--bg);
  padding: 2.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  text-align: center;
}

.footer-cta-label {
  font-size: 1rem;
  font-weight: 500;
  color: var(--bg2);
  margin: 0;
}

.footer-cta-block .btn-primary {
  background: var(--bg);
  color: var(--ink);
  border-color: var(--bg);
}

.footer-cta-block .btn-primary:hover {
  background: var(--bg2);
  color: var(--ink);
}

.footer-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  flex: 1;
}

.footer-nav a {
  font-size: 0.78rem;
  color: var(--ink3);
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.footer-nav a:hover {
  color: var(--ink);
  border-color: var(--ink2);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--ink3);
  white-space: nowrap;
  margin: 0;
}

/* ===== 响应式断点 ===== */
@media (max-width: 900px) {
  .home-content,
  .channel-layout,
  .article-layout,
  .about-layout,
  .privacy-layout {
    grid-template-columns: 1fr;
  }

  .home-aside,
  .channel-aside,
  .article-aside,
  .about-aside,
  .privacy-aside {
    order: 2;
  }

  .home-main,
  .channel-main,
  .article-main,
  .about-main,
  .privacy-main {
    order: 1;
  }

  .aside-inner {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  .aside-inner h3 { display: none; }
  .aside-divider { display: none; }
}

@media (max-width: 768px) {
  :root {
    --header-h: 56px;
  }

  .header-inner {
    padding: 0 1rem;
    gap: 0.75rem;
  }

  .brand-name {
    font-size: 0.82rem;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .main-nav {
    display: none;
  }

  .hero-inner {
    padding: 2rem 1rem;
    justify-content: flex-start;
  }

  .hero-text {
    text-align: left;
    max-width: 100%;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .hero-bg-text {
    font-size: 6rem;
    opacity: 0.3;
  }

  .wrap {
    padding: 0 1rem;
  }

  .art-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .art-row-meta { display: none; }

  .footer-main {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
  }

  .footer-nav {
    gap: 0.2rem;
  }

  .footer-cta-block {
    flex-direction: column;
    gap: 1rem;
    padding: 1.75rem 1rem;
  }

  .article-footer-nav {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .ch-grid {
    grid-template-columns: 1fr;
  }

  .hero-block {
    min-height: 55vh;
  }
}

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* ===== Hover 微交互 ===== */
.ch-card {
  transition: border-color 0.12s, box-shadow 0.12s;
}

.ch-card:hover {
  border-color: var(--border);
  box-shadow: 2px 2px 0 var(--border);
}

.child-card,
.related-link,
.about-ch-link {
  transition: padding-left 0.1s;
}

.child-card:hover,
.related-link:hover,
.about-ch-link:hover {
  padding-left: 0.4rem;
}

/* stagger list（JS 辅助，CSS 定义） */
.art-list .art-row,
.child-grid .child-card,
.related-grid .related-link {
  opacity: 1;
}

.js-stagger .art-row,
.js-stagger .child-card,
.js-stagger .related-link {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
}

.js-stagger .art-row.visible,
.js-stagger .child-card.visible,
.js-stagger .related-link.visible {
  opacity: 1;
  transform: none;
}