/* style.css — 页面级布局（首页 / 分类页 / 详情页）
   组件与变量分别在 components.css、tokens.css。 */

/* ================= 首页 ================= */

.hero {
  padding-block: clamp(40px, 5vw, 72px) clamp(32px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong) 0 12%, transparent 12% 100%);
  opacity: 0.7;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}

.hero-copy { max-width: 576px; }

.hero h1 {
  margin-top: 16px;
  text-wrap: balance;
  font-size: var(--text-hero);
  line-height: 1.06;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.hero h1 .dot { color: var(--copper); }

.hero-lede {
  margin-top: 24.8px;
  max-width: 576px;
  color: var(--ink-soft);
  font-size: var(--text-lg);
  line-height: 1.92;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13.6px;
  margin-top: 33.6px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  margin-top: 33.6px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.88px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.hero-facts strong {
  display: block;
  margin-bottom: 3.2px;
  font-family: var(--font-serif);
  font-size: 17.6px;
  letter-spacing: 0.02em;
  color: var(--ink);
  font-weight: 600;
}

.hero-media { position: relative; }
.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.hero-media::before {
  content: "";
  position: absolute;
  inset: -14px 14px 14px -14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.hero-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 7.2px 12.8px;
  background: color-mix(in srgb, var(--paper-raised) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  color: var(--muted);
  letter-spacing: 0.06em;
  backdrop-filter: blur(6px);
}

/* ---------- 分类网格 ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.category-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.category-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
}

.category-card .thumb {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-deep);
}
.category-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}
.category-card:hover .thumb img { transform: scale(1.04); }

.category-card .body {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18.4px 19.2px;
}

.category-card h3 { font-size: 19.2px; margin-bottom: 5.6px; }
.category-card p { color: var(--muted); font-size: var(--text-sm); line-height: 1.72; }
.category-card .index {
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.88px;
  color: var(--copper);
  letter-spacing: 0.08em;
  padding-top: 4px;
}

/* ---------- 编辑推荐 + 最新笔记 ---------- */
.band {
  background: linear-gradient(180deg, color-mix(in srgb, var(--paper-deep) 55%, transparent), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.band-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}

.picks { display: grid; gap: 16px; }

.pick-main {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.pick-main:hover { border-color: var(--line-strong); box-shadow: var(--shadow-lift); }
.pick-main .thumb { aspect-ratio: 4 / 3; overflow: hidden; background: var(--paper-deep); }
.pick-main .thumb img { width: 100%; height: 100%; object-fit: cover; }
.pick-main .body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 11.2px;
  padding: 20.8px 20px;
}
.pick-main .body > .tag { align-self: flex-start; }
.pick-main h3 { font-size: 21.6px; line-height: 1.45; }
.pick-main p { color: var(--muted); font-size: var(--text-sm); line-height: 1.8; }

.pick-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17.6px 19.2px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.pick-item:hover { border-color: var(--teal); transform: translateX(3px); }
.pick-item h3 { font-size: 17.28px; line-height: 1.5; margin-block: 6.4px 4.8px; }
.pick-item p { color: var(--muted); font-size: var(--text-sm); line-height: 1.75; }
.pick-item .go { color: var(--teal); padding-top: 4px; }

.latest-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14.4px;
  border-bottom: 1px solid var(--line-strong);
}
.latest-head h2 { font-size: 20px; }
.latest-head span { font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif; font-size: 10.4px; letter-spacing: 0.14em; color: var(--muted); }

.latest { border-top: 0; }
.latest-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15.2px 0;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease);
}
.latest-item:hover { color: var(--teal); }
.latest-item .body { display: flex; flex-direction: column; gap: 4px; }
.latest-item .idx {
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  color: var(--copper);
  letter-spacing: 0.06em;
}
.latest-item h3 { font-size: 15.68px; line-height: 1.55; font-weight: 600; }
.latest-item .go { color: var(--muted); padding-top: 4.8px; }

/* ---------- 四类仪器速查 ---------- */
.route-note {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
  margin-bottom: 28.8px;
}
.route-note p { color: var(--ink-soft); font-size: var(--text-lg); line-height: 1.9; }
.route-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 6.4px 20px;
  padding-top: 5.6px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.4px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.route-scale span { display: inline-flex; align-items: center; gap: 6.4px; }
.route-scale i { width: 18px; height: 1px; background: var(--copper); display: inline-block; }

/* ---------- 四步流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 22.4px 18.4px 20.8px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.step::before {
  content: "";
  position: absolute;
  left: 18.4px;
  right: 18.4px;
  top: 0;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0.35);
  transform-origin: left;
}
.step .num {
  display: block;
  margin-bottom: 13.6px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 11.2px;
  letter-spacing: 0.12em;
  color: var(--copper);
}
.step h3 { font-size: 18.4px; margin-bottom: 8.8px; }
.step p { color: var(--muted); font-size: var(--text-sm); line-height: 1.8; }

/* ---------- 内容说明 ---------- */
.editorial-note {
  padding: 20px 22.4px;
  background: color-mix(in srgb, var(--paper-deep) 65%, transparent);
  border-left: 2px solid var(--teal);
  color: var(--ink-soft);
  font-size: var(--text-sm);
  line-height: 1.9;
}

/* ================= 分类页 ================= */

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: center;
  padding-block: 24px clamp(36px, 4vw, 52px);
}
.page-hero h1 { font-size: clamp(38.4px, 4.6vw, 57.6px); line-height: 1.1; }
.page-hero h1 .dot { color: var(--copper); }
.page-hero .lede {
  margin-top: 19.2px;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: var(--text-lg);
  line-height: 1.92;
}
.page-hero .media { position: relative; }
.page-hero .media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-hero .media::before {
  content: "";
  position: absolute;
  inset: -12px 12px 12px -12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 22.4px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.88px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7.2px;
  padding-top: 17.6px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.88px;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--teal); }
.crumbs .sep { color: var(--line-strong); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 22.4px);
  padding-top: 24px;
}
.card-grid .card {
  min-height: 100%;
  border-top: 2px solid var(--line-strong);
}
.card-grid .card:hover { border-top-color: var(--teal); }
.card-body > .card-meta:first-child { margin-top: 0; padding-top: 0; }
.card-grid .card-title a:hover { color: var(--teal); }

.empty-state {
  display: none;
  padding: 32px 0;
  color: var(--muted);
  font-size: var(--text-sm);
}
.empty-state.is-visible { display: block; }

.list-description {
  max-width: 68ch;
  padding-block: clamp(36px, 4vw, 52px);
}
.list-description h2 { font-size: 24px; margin-bottom: 17.6px; }
.list-description p {
  color: var(--ink-soft);
  font-size: 16.32px;
  line-height: 2.05;
}
.list-description p + p { margin-top: 17.6px; }

.related-categories {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.related-card {
  display: flex;
  flex-direction: column;
  gap: 5.6px;
  padding: 19.2px 20px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.related-card:hover { border-color: var(--teal); transform: translateY(-2px); }
.related-card .tag { align-self: flex-start; margin-bottom: 5.6px; }
.related-card h3 { font-size: 17.6px; }
.related-card p { color: var(--muted); font-size: var(--text-sm); line-height: 1.75; }
.related-card .go { margin-top: 5.6px; color: var(--teal); font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif; font-size: 10.56px; letter-spacing: 0.06em; }

.footer-desc a { color: color-mix(in srgb, var(--paper-raised) 90%, transparent); }
.footer-desc a:hover { color: var(--white); text-decoration: underline; text-underline-offset: 4px; }

/* ================= 详情页 ================= */

.article-head {
  max-width: 860px;
  margin-inline: auto;
  padding-top: 8px;
  padding-bottom: clamp(24px, 3vw, 36px);
}
.article-head h1 {
  font-size: clamp(33.6px, 4.2vw, 51.2px);
  line-height: 1.2;
  text-wrap: balance;
}
.article-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14.4px;
  margin-top: 17.6px;
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.8;
}
.article-kicker .tag { margin-right: 1.6px; }
.article-figure {
  max-width: 1040px;
  margin: 0 auto clamp(32px, 4vw, 48px);
}
.article-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.article-figure figcaption {
  margin-top: 10.4px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.article-layout {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
  max-width: 1080px;
  margin-inline: auto;
}

.article-body { max-width: 720px; min-width: 0; }

.article-intro {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 18.56px;
  line-height: 1.95;
}

.article-body h2 {
  margin-top: 40px;
  padding-top: 8px;
  font-size: clamp(22.4px, 2.3vw, 27.2px);
  scroll-margin-top: 110px;
}
.article-body h2::before {
  content: attr(data-index);
  display: block;
  margin-bottom: 6.4px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--copper);
}
.article-body h2 + p { margin-top: 16px; }
.article-body p {
  color: var(--ink-soft);
  font-size: 16.32px;
  line-height: 2.05;
}
.article-body p + p { margin-top: 16.8px; }

.article-table { margin-top: 25.6px; }

.toc {
  position: sticky;
  top: 110px;
  padding: 17.6px 19.2px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.toc-title {
  margin-bottom: 12px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.toc ol { display: flex; flex-direction: column; gap: 2.4px; counter-reset: toc; }
.toc a {
  display: flex;
  gap: 8.8px;
  padding: 6.72px 3.2px;
  color: var(--ink-soft);
  font-size: 13.76px;
  line-height: 1.5;
  border-left: 2px solid transparent;
  padding-left: 9.6px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.toc a::before {
  counter-increment: toc;
  content: counter(toc, decimal-leading-zero);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 9.92px;
  color: var(--copper);
  padding-top: 2.56px;
}
.toc a:hover { color: var(--teal); }
.toc a.is-active { color: var(--teal); border-left-color: var(--teal); }

.article-footer {
  max-width: 1080px;
  margin: clamp(40px, 5vw, 64px) auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.article-footer .section-head { margin-bottom: 20px; }
.article-footer h2 { font-size: 21.6px; }

.related-articles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.related-articles .card-body { gap: 7.2px; }
.related-articles .card-title { font-size: 16px; }

/* ---------- 首页内容模块（4 列） ---------- */
.card-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 卡片截断（等高） ---------- */
.card-title,
.card-text {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}
.card-title { -webkit-line-clamp: 2; }
.card-text { -webkit-line-clamp: 3; }

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: clamp(28px, 3vw, 40px);
}
.pager a,
.pager .pager-current,
.pager .pager-gap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 40px;
  padding: 6px 13.6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
  font-size: var(--text-sm);
  color: var(--ink-soft);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pager a:hover { border-color: var(--teal); color: var(--teal); }
.pager .pager-current {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
}
.pager .pager-gap { border: 0; background: transparent; color: var(--muted); }

/* ---------- 正文配图与上下篇 ---------- */
.article-body figure { margin: 24px 0 28px; }
.article-body figure img {
  width: 100%;
  max-width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
}
.article-body figure figcaption {
  margin-top: 9.6px;
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: 1.7;
}

.article-nav {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.article-nav a {
  flex: 1 1 0;
  min-width: 0;
  max-width: calc(50% - 8px);
  display: block;
  padding: 16px 18.4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.article-nav a:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.article-nav .nav-label {
  display: block;
  margin-bottom: 4.8px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.article-nav h3 { font-size: 16px; line-height: 1.5; }
.article-nav .nav-next { text-align: right; margin-left: auto; }

/* ---------- 首页：编辑推荐（带图小卡） ---------- */
.pick-item--media {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
}
.pick-item--media .thumb {
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper-deep);
}
.pick-item--media .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}
.pick-item--media:hover .thumb img { transform: scale(1.04); }

/* ---------- 首页：分类深读（图文左右交替） ---------- */
.deep-block {
  padding-block: clamp(28px, 3.2vw, 44px);
  border-top: 1px solid var(--line);
}
.deep-block:first-of-type { border-top: 0; padding-top: clamp(4px, 1vw, 12px); }

.deep {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(24px, 3.2vw, 48px);
  align-items: start;
  padding-top: 18.4px;
}
.deep--flip .deep-lead { order: 2; }
.deep--flip .deep-side { order: 1; }

.deep-lead { display: block; }
.deep-lead .thumb {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--paper-deep);
}
.deep-lead .thumb img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}
.deep-lead:hover .thumb img { transform: scale(1.03); }
.deep-lead .tag { margin-top: 14.4px; }
.deep-lead h3 {
  margin-top: 9.6px;
  font-size: clamp(19.2px, 1.9vw, 23.2px);
  line-height: 1.42;
}
.deep-lead:hover h3 { color: var(--teal); }
.deep-lead p {
  margin-top: 8px;
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.85;
}

.deep-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 10.4px;
  border-bottom: 1px solid var(--line-strong);
}
.deep-head h3 { font-size: 19.2px; }
.deep-head .deep-count {
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.88px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}
.deep-list { display: block; }
.deep-item {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  align-items: center;
  gap: 14.4px;
  padding: 12.8px 0;
  border-bottom: 1px solid var(--line);
}
.deep-item .thumb {
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper-deep);
}
.deep-item .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}
.deep-item:hover .thumb img { transform: scale(1.05); }
.deep-item h4 {
  font-family: var(--font-serif);
  font-size: 15.2px;
  font-weight: 600;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}
.deep-item:hover h4 { color: var(--teal); }
.deep-item .meta {
  margin-top: 4.8px;
  font-size: 10.88px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.deep-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 13.6px;
  font-size: 13.6px;
  color: var(--teal);
}

/* ---------- 首页：分类快捷条 ---------- */
.cat-strip { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14.4px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--paper-raised);
  font-size: var(--text-sm);
  color: var(--ink-soft);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.cat-chip span { color: var(--muted); font-size: 10.88px; }
.cat-chip:hover { border-color: var(--teal); color: var(--teal); }

/* ================= 响应式 ================= */

@media (max-width: 1100px) {
  .nav-list { gap: 13.6px; font-size: 13.12px; }
  .header-note { display: none; }
}

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-copy { max-width: 672px; }
  .hero-media { max-width: 672px; }
  .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .band-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-hero { grid-template-columns: 1fr; gap: 32px; padding-bottom: 16px; }
  .page-hero .media { max-width: 672px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .deep { grid-template-columns: 1fr; }
  .deep--flip .deep-lead, .deep--flip .deep-side { order: 0; }
  .card-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-nav { flex-wrap: wrap; }
  .article-nav a { flex: 1 1 100%; max-width: 100%; }
  .article-nav .nav-next { text-align: left; margin-left: 0; }
  .related-categories, .related-articles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: minmax(0, 1fr); max-width: 760px; }
  .toc { position: static; order: -1; }
  .article-body { max-width: none; }
  .route-note { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 700px) {
  .pick-main { grid-template-columns: 1fr; }
  .pick-item--media { grid-template-columns: 88px minmax(0, 1fr); }
  .pick-item--media .go { display: none; }
  .pick-main .thumb { aspect-ratio: 16 / 10; }
  .category-card .body { padding: 14.4px 16px 16.8px; }
}

@media (max-width: 560px) {
  .hero { padding-top: 28px; }
  .hero h1 { font-size: clamp(40px, 12vw, 54.4px); }
  .hero-lede { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .hero-facts { gap: 12px 20px; }
  .category-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid--4 { grid-template-columns: 1fr; }
  .related-categories, .related-articles { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}


/* ---------- 版式工具类（替代内联样式） ---------- */
.section--flush { padding-top: 0; }
.section-head--spaced { margin-top: 32px; }
.section-lede--flush { padding-left: 0; margin-top: 14.4px; }
.container--narrow { max-width: 900px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.article-table .table-wrap { margin-top: 16px; }

.table-hint {
  display: none;
  margin-top: 8.8px;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 10.56px;
  letter-spacing: 0.05em;
  color: var(--muted);
}
@media (max-width: 700px) { .table-hint { display: block; } }