:root {
  --shell: 1180px;
  --paper: #F6F7F3;
  --card: #FFFFFF;
  --pine: #12564B;
  --pine-soft: #2E7D6F;
  --brick: #C85C2C;
  --ink: #1B2422;
  --ink-soft: #5C6B66;
  --line: #DCE3DC;
  --tint: #EDF2EC;
  --radius: 6px;
  --shadow-soft: 0 1px 2px rgba(18, 86, 75, 0.06);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body.site-body,
body.site-home,
body.site-inner,
body.site-error {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--pine);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover,
a:focus-visible {
  color: var(--brick);
}

a:focus-visible {
  outline: 2px solid var(--pine-soft);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
}

h1 { font-size: clamp(28px, 3.4vw, 40px); }
h2 { font-size: 24px; }
h3 { font-size: 18px; }

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

figure {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Layout — 页头 / 主容器 / 页脚
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 700;
  font-size: 17px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--pine);
}

.brand-mark {
  display: inline-block;
  width: 10px;
  height: 18px;
  background: var(--brick);
  border-radius: 2px;
}

.announce-strip {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pine-soft);
  flex-shrink: 0;
}

.main-nav.site-nav {
  flex-shrink: 0;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--pine);
}

.main-nav a.is-current {
  color: var(--pine);
  border-bottom-color: var(--brick);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-shrink: 0;
}

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  background: var(--card);
  border-top: 1px solid var(--line);
  padding: 8px 0;
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
}

.mobile-nav a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  color: var(--ink);
  font-size: 15px;
  border-left: 3px solid transparent;
}

.mobile-nav a.is-current {
  color: var(--pine);
  border-left-color: var(--brick);
  background: var(--tint);
  font-weight: 600;
}

.site-main {
  display: block;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 32px 24px 56px;
}

.home-main {
  padding-top: 28px;
}

.inner-main {
  padding-top: 20px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.breadcrumb a {
  color: var(--ink-soft);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--pine);
}

.breadcrumb-sep {
  color: var(--line);
}

.breadcrumb-current {
  color: var(--ink);
}

.page-header {
  margin-bottom: 20px;
}

.page-title {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.3;
  color: var(--ink);
  font-weight: 700;
}

.page-head {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-lead {
  font-size: 16px;
  color: var(--ink);
  line-height: 1.8;
  max-width: 68ch;
  margin-bottom: 10px;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--ink-soft);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background: var(--tint);
  border-radius: var(--radius);
  color: var(--pine);
}

.site-footer {
  background: var(--card);
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 36px 24px 24px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.footer-group h2 {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 12px;
  font-weight: 700;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-group li a {
  display: inline-block;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.footer-group li a:hover,
.footer-group li a:focus-visible {
  color: var(--pine);
}

.footer-bottom {
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  font-size: 13px;
  color: var(--ink-soft);
}

.footer-brand {
  color: var(--ink);
  font-weight: 600;
}

.footer-slogan {
  color: var(--ink-soft);
}

.footer-copy {
  color: var(--ink-soft);
  margin-left: auto;
}

/* ============================================================
   Components — 通用按钮 / 卡片 / 表格 / 步骤 / FAQ / 相关路径
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn-primary {
  background: var(--pine);
  color: #FFFFFF;
  border-color: var(--pine);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--pine-soft);
  border-color: var(--pine-soft);
  color: #FFFFFF;
}

.btn-ghost {
  background: transparent;
  color: var(--pine);
  border-color: var(--pine);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--tint);
  color: var(--pine);
}

.section-intro,
.section-lead,
.section-note,
.chip-index-lead,
.entry-list-lead,
.compare-lead {
  margin: 8px 0 20px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.75;
  max-width: 68ch;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  color: var(--ink);
}

.compare-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  background: var(--tint);
}

.compare-table th,
.compare-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.65;
}

.compare-table thead th {
  background: var(--tint);
  color: var(--pine);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0;
}

.compare-table tbody th {
  font-weight: 600;
  color: var(--ink);
  background: #FAFBF8;
  width: 22%;
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: 0;
}

.step-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.step-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-num,
.step-index {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.step-item h3 {
  font-size: 16px;
  color: var(--ink);
}

.step-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.faq-item,
.faq-details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  padding: 0 18px;
}

.faq-item summary,
.faq-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker,
.faq-details summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after,
.faq-details summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--pine);
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after,
.faq-details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
  border-color: var(--pine-soft);
}

.faq-item p,
.faq-details p {
  padding: 0 0 18px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.8;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

.related-links {
  margin-top: 40px;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.related-links-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 14px;
  color: var(--pine);
  padding: 4px 12px;
  background: var(--tint);
  border-radius: var(--radius);
}

.related-links-item:hover,
.related-links-item:focus-visible {
  background: var(--pine);
  color: #FFFFFF;
}

.related-paths {
  margin-top: 40px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-paths h2 {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 14px;
}

.related-paths ul,
.related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.related-paths li a,
.related-list li a {
  display: inline-block;
  font-size: 14px;
  color: var(--pine);
  padding: 6px 0;
  border-bottom: 1px dashed var(--line);
}

.related-paths li a:hover,
.related-list li a:hover,
.related-paths li a:focus-visible,
.related-list li a:focus-visible {
  color: var(--brick);
}

/* ============================================================
   Pages — 首页
   ============================================================ */

.hero {
  margin-bottom: 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  margin-bottom: 28px;
}

.hero-lead h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--ink);
}

.hero-sub {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-status {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 20px;
}

.status-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.status-row:last-child {
  border-bottom: 0;
}

.status-label {
  font-size: 12px;
  color: var(--brick);
  font-weight: 600;
}

.status-text {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.6;
}

.hero-figure {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
}

.hero-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  height: auto;
}

.hero-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.channels-entry,
.featured,
.channel-list,
.path-steps,
.compare-summary,
.home-faq {
  margin-bottom: 48px;
}

.channels-entry h2,
.featured h2,
.channel-list h2,
.path-steps h2,
.compare-summary h2,
.home-faq h2 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 4px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.entry-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.entry-card:hover {
  border-color: var(--pine-soft);
  box-shadow: var(--shadow-soft);
}

.entry-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
}

.entry-card h3 {
  font-size: 17px;
  color: var(--ink);
}

.entry-card p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 14px;
  font-weight: 600;
  color: var(--pine);
  border-bottom: 1px solid var(--pine);
  align-self: flex-start;
  padding: 0;
}

.card-link:hover,
.card-link:focus-visible {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

.waterfall-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

.waterfall-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.media-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.18s ease;
}

.media-card:hover {
  border-color: var(--pine-soft);
}

.media-thumb {
  position: relative;
  background: var(--tint);
  overflow: hidden;
}

.media-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  height: auto;
  transition: filter 0.25s ease;
}

.media-card:hover .media-thumb img {
  filter: brightness(1.04);
}

.media-tag {
  display: inline-block;
  margin: 14px 16px 0;
  font-size: 12px;
  color: var(--brick);
  font-weight: 600;
}

.media-card h3 {
  font-size: 16px;
  color: var(--ink);
  margin: 6px 16px 8px;
  line-height: 1.5;
}

.media-meta {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 16px 16px;
  line-height: 1.6;
}

.channel-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.channel-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1.4fr) auto;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.channel-row:hover {
  border-color: var(--pine-soft);
}

.channel-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--brick);
  line-height: 1;
}

.channel-name {
  font-size: 16px;
  color: var(--ink);
  margin: 0;
}

.channel-scope {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--tint);
  color: var(--pine);
  border-radius: var(--radius);
  white-space: nowrap;
}

.channel-link:hover,
.channel-link:focus-visible {
  background: var(--pine);
  color: #FFFFFF;
}

.compare-note {
  margin-top: 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.compare-note a {
  color: var(--pine);
  font-weight: 600;
  border-bottom: 1px solid var(--pine);
}

.compare-note a:hover,
.compare-note a:focus-visible {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

/* ============================================================
   Pages — 内页通用补充
   ============================================================ */

.section {
  margin-bottom: 40px;
}

.section h2 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 4px;
}

/* 作品总目录 */
.catalog-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  margin-bottom: 32px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.catalog-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
}

.catalog-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  height: auto;
}

.catalog-figure figcaption {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.catalog-note {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.chip-index {
  margin-bottom: 40px;
}

.chip-index h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 6px;
}

.chip-group {
  margin-bottom: 16px;
}

.chip-group h3 {
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 600;
  margin-bottom: 10px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  font-size: 13px;
  color: var(--pine);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.chip:hover,
.chip:focus-visible {
  border-color: var(--pine-soft);
  background: var(--tint);
  color: var(--pine);
}

.entry-list {
  margin-bottom: 40px;
}

.entry-list h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 6px;
}

.entry-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 130px 100px;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  transition: border-color 0.18s ease;
}

.entry-row:hover {
  border-color: var(--pine-soft);
}

.entry-no {
  font-size: 18px;
  font-weight: 700;
  color: var(--brick);
  line-height: 1;
}

.entry-body {
  min-width: 0;
}

.entry-title {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 4px;
}

.entry-fields {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.entry-channel {
  margin: 0;
}

.channel-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--pine);
  background: var(--tint);
  border-radius: var(--radius);
  white-space: nowrap;
}

.entry-link {
  margin: 0;
  text-align: right;
}

.entry-link a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: var(--pine);
  border-bottom: 1px solid var(--pine);
}

.entry-link a:hover,
.entry-link a:focus-visible {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

.compare-section {
  margin-bottom: 40px;
}

.compare-section h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 6px;
}

.compare-foot {
  margin-top: 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.compare-foot a {
  color: var(--pine);
  border-bottom: 1px solid var(--pine);
}

.reading-guide {
  margin-bottom: 40px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.reading-guide h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 12px;
}

.reading-guide p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 68ch;
}

.reading-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.reading-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--tint);
  color: var(--pine);
  border-radius: var(--radius);
}

.reading-links a:hover,
.reading-links a:focus-visible {
  background: var(--pine);
  color: #FFFFFF;
}

/* 频道分类 */
.section-basis {
  margin-bottom: 32px;
}

.basis-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.basis-list li {
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.basis-list h3 {
  font-size: 15px;
  color: var(--pine);
  margin-bottom: 6px;
}

.basis-list p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.channel-figure {
  margin-bottom: 32px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
  border: 1px solid var(--line);
}

.channel-figure img {
  width: 100%;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  height: auto;
}

.channel-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.section-channels {
  margin-bottom: 40px;
}

.channel-block {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(0, 2fr);
  gap: 24px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 14px;
  transition: border-color 0.18s ease;
}

.channel-block:hover {
  border-color: var(--pine-soft);
}

.channel-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.channel-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.channel-scope,
.channel-exclude {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0;
}

.field-label {
  display: inline-block;
  min-width: 4em;
  font-weight: 600;
  color: var(--pine);
  margin-right: 6px;
}

.channel-samples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 0;
}

.channel-samples li {
  font-size: 13px;
  color: var(--ink);
  padding: 4px 10px;
  background: var(--tint);
  border-radius: var(--radius);
}

.section-cross {
  margin-bottom: 40px;
}

.cross-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.cross-list li {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.cross-pair {
  font-size: 14px;
  font-weight: 600;
  color: var(--pine);
}

.cross-list p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}

.cross-list a {
  font-size: 13px;
  color: var(--pine);
  border-bottom: 1px solid var(--pine);
  white-space: nowrap;
}

.section-notice-hint {
  margin-bottom: 32px;
  padding: 20px;
  background: var(--tint);
  border-radius: var(--radius);
}

.section-notice-hint h2 {
  font-size: 18px;
  color: var(--pine);
  margin-bottom: 8px;
}

.section-notice-hint p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 6px;
}

.section-notice-hint a {
  color: var(--pine);
  font-weight: 600;
  border-bottom: 1px solid var(--pine);
}

/* 专题片单 */
.shell {
  width: 100%;
}

.principles,
.waterfall-section,
.cross-entry,
.suggestion-note {
  margin-bottom: 40px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.principle-item {
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.principle-item h3 {
  font-size: 15px;
  color: var(--pine);
  margin-bottom: 8px;
}

.principle-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.18s ease;
}

.feature-card:hover {
  border-color: var(--pine-soft);
}

.feature-media {
  background: var(--tint);
  overflow: hidden;
}

.feature-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  height: auto;
}

.feature-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 12px;
  color: var(--brick);
  font-weight: 600;
  padding: 2px 8px;
  background: #FBF1EB;
  border-radius: var(--radius);
}

.feature-card h3 {
  font-size: 16px;
  color: var(--ink);
  line-height: 1.5;
}

.feature-reason {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.feature-spec {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  padding-top: 6px;
  border-top: 1px dashed var(--line);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pine);
  border-bottom: 1px solid var(--pine);
  align-self: flex-start;
}

.feature-link:hover,
.feature-link:focus-visible {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

.waterfall-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  padding: 14px 18px;
  background: var(--tint);
  border-radius: var(--radius);
}

.cross-entry {
  margin-bottom: 40px;
}

.cross-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.cross-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--tint);
  border-bottom: 1px solid var(--line);
}

.cross-table th,
.cross-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.65;
  word-break: break-word;
}

.cross-table thead th {
  background: var(--tint);
  color: var(--pine);
  font-weight: 600;
  font-size: 13px;
}

.cross-table tbody th {
  background: #FAFBF8;
  color: var(--ink);
  font-weight: 600;
}

.cross-table tbody tr:last-child th,
.cross-table tbody tr:last-child td {
  border-bottom: 0;
}

.suggestion-note p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 68ch;
}

.suggestion-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.suggestion-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--tint);
  color: var(--pine);
  border-radius: var(--radius);
}

.suggestion-links a:hover,
.suggestion-links a:focus-visible {
  background: var(--pine);
  color: #FFFFFF;
}

/* 观看指南 */
.guide-flow,
.label-table,
.entry-check,
.faq-block {
  margin-bottom: 40px;
}

.guide-flow h2,
.label-table h2,
.entry-check h2,
.faq-block h2 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 4px;
}

.entry-check-body {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  margin-top: 16px;
}

.entry-check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entry-check-list li {
  padding: 16px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-check-list h3 {
  font-size: 15px;
  color: var(--pine);
  margin-bottom: 6px;
}

.entry-check-list p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.entry-check-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
  border: 1px solid var(--line);
}

.entry-check-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  height: auto;
}

.entry-check-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.faq-block .section-lead {
  margin-bottom: 20px;
}

/* 公告 */
.notice-index {
  margin-bottom: 40px;
}

.section-head {
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 4px;
}

.notice-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
  border: 1px solid var(--line);
  margin-bottom: 20px;
}

.notice-figure img {
  width: 100%;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  height: auto;
}

.notice-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.notice-index-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.notice-index-row {
  display: grid;
  grid-template-columns: 80px 160px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.notice-code {
  font-size: 14px;
  font-weight: 700;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.notice-type {
  font-size: 14px;
  color: var(--pine);
  font-weight: 600;
}

.notice-scope {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}

.notice-article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.notice-article-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.notice-article-head h2 {
  font-size: 20px;
  color: var(--ink);
  margin: 0;
}

.notice-body h3 {
  font-size: 15px;
  color: var(--pine);
  margin: 16px 0 6px;
}

.notice-body h3:first-child {
  margin-top: 0;
}

.notice-body p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 68ch;
}

.notice-related {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.notice-related-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.notice-related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.notice-related a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
  background: var(--tint);
  color: var(--pine);
  border-radius: var(--radius);
}

.notice-related a:hover,
.notice-related a:focus-visible {
  background: var(--pine);
  color: #FFFFFF;
}

.site-boundaries {
  margin-bottom: 40px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.boundary-column {
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-column h3 {
  font-size: 15px;
  color: var(--pine);
  margin-bottom: 12px;
}

.boundary-column ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.boundary-column li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.boundary-column li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brick);
}

/* 纠错与反馈 */
.feedback-elements,
.feedback-steps,
.feedback-scope {
  margin-bottom: 40px;
}

.feedback-elements h2,
.feedback-steps h2,
.feedback-scope h2 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 6px;
}

.feedback-elements > p,
.feedback-steps > p,
.feedback-scope > p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 20px;
  max-width: 68ch;
}

.feedback-elements-body {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.element-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: element;
}

.element-list li {
  position: relative;
  padding: 14px 18px 14px 52px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: element;
}

.element-list li::before {
  content: counter(element, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.element-list h3 {
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 4px;
}

.element-list p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.feedback-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--tint);
  border: 1px solid var(--line);
}

.feedback-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  height: auto;
}

.feedback-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--card);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.scope-col {
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-col h3 {
  font-size: 15px;
  margin-bottom: 12px;
}

.scope-accept h3 {
  color: var(--pine);
}

.scope-reject h3 {
  color: var(--brick);
}

.scope-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scope-col li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.scope-accept li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--pine-soft);
  font-weight: 700;
}

.scope-reject li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: var(--brick);
  font-weight: 700;
}

/* 404 */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.error-head {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  font-size: 48px;
  font-weight: 700;
  color: var(--brick);
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.error-head .page-lead {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  max-width: 60ch;
}

.error-head .page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--ink-soft);
}

.error-paths {
  margin-bottom: 32px;
}

.error-paths h2 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 14px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.error-path-list li a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15px;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.error-path-list li a:hover,
.error-path-list li a:focus-visible {
  border-color: var(--pine-soft);
  color: var(--pine);
}

.error-note {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 60ch;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 960px) {
  .header-inner {
    gap: 12px;
  }

  .announce-strip {
    font-size: 12px;
  }

  .main-nav.site-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
    margin-left: auto;
  }

  .mobile-nav {
    display: block;
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .site-main {
    padding: 24px 20px 48px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .waterfall-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .channel-row {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-areas:
      "num name"
      "scope scope"
      "link link";
    align-items: start;
    gap: 8px 14px;
  }

  .channel-row .channel-num { grid-area: num; }
  .channel-row .channel-name { grid-area: name; }
  .channel-row .channel-scope { grid-area: scope; }
  .channel-row .channel-link { grid-area: link; justify-self: start; }

  .entry-row {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-areas:
      "no body"
      "channel channel"
      "link link";
    align-items: start;
    gap: 8px 14px;
  }

  .entry-row .entry-no { grid-area: no; }
  .entry-row .entry-body { grid-area: body; }
  .entry-row .entry-channel { grid-area: channel; }
  .entry-row .entry-link { grid-area: link; text-align: left; }

  .channel-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .cross-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .catalog-intro,
  .entry-check-body,
  .feedback-elements-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .basis-list,
  .principle-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .footer-copy {
    margin-left: 0;
  }

  .notice-index-row {
    grid-template-columns: 64px minmax(0, 1fr);
    grid-template-areas:
      "code type"
      "scope scope";
    gap: 6px 14px;
  }

  .notice-index-row .notice-code { grid-area: code; }
  .notice-index-row .notice-type { grid-area: type; }
  .notice-index-row .notice-scope { grid-area: scope; }

  .cross-table,
  .compare-table {
    font-size: 13px;
  }

  .cross-table th,
  .cross-table td,
  .compare-table th,
  .compare-table td {
    padding: 10px 12px;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
    min-height: 58px;
    gap: 8px;
  }

  .brand {
    font-size: 15px;
  }

  .announce-strip {
    display: none;
  }

  .site-main {
    padding: 20px 16px 40px;
  }

  .page-title,
  .hero-lead h1 {
    font-size: 26px;
  }

  .page-head {
    margin-bottom: 20px;
    padding-bottom: 16px;
  }

  .page-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .hero-grid {
    gap: 20px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-figure img {
    aspect-ratio: 16 / 10;
  }

  .entry-grid,
  .waterfall-columns,
  .basis-list,
  .principle-list,
  .boundary-columns,
  .scope-columns,
  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-row {
    padding: 14px 16px;
  }

  .entry-row {
    padding: 14px 16px;
  }

  .cross-list li {
    padding: 12px 14px;
  }

  .notice-article {
    padding: 18px;
  }

  .notice-article-head {
    flex-wrap: wrap;
    gap: 6px;
  }

  .compare-table tbody th {
    width: auto;
    min-width: 90px;
  }

  .cross-table,
  .compare-table {
    min-width: 560px;
  }

  .table-scroll {
    border-radius: var(--radius);
  }

  .related-paths {
    padding: 18px;
  }

  .footer-inner {
    padding: 28px 16px 20px;
  }

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    padding-bottom: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .error-main {
    padding: 32px 16px 48px;
  }

  .error-code {
    font-size: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}