/* ==========================================================================
   独播库 7xiaolang.com · 全站样式
   分组：基础 / 布局 / 组件 / 页面 / 响应式
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 基础 base
   -------------------------------------------------------------------------- */

:root {
  --paper: #FBFAF7;
  --ink: #1C2B26;
  --pine: #1F4B3F;
  --clay: #C4622D;
  --mist: #6B7C77;
  --line: #DEDAD0;
  --wash: #F1EEE6;
  --radius: 4px;
  --shell: 1120px;
  --prose: 760px;
  --gutter: 24px;
}

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

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

body.site-body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
ol,
ul {
  margin: 0;
  padding: 0;
}

ol,
ul {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  text-align: left;
  vertical-align: top;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   2. 布局 layout · 外壳
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 68px;
}

.brand {
  flex: 0 0 auto;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1.2;
  padding: 10px 0;
}

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

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
  min-width: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 2px;
  margin: 0;
  padding: 0;
}

.nav-list > li {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  line-height: 1.2;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--pine);
  border-bottom-color: var(--line);
}

.nav-link.is-current {
  color: var(--pine);
  font-weight: 600;
  border-bottom-color: var(--clay);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
}

.mobile-drawer {
  display: block;
  border-top: 1px solid var(--line);
  background: var(--wash);
}

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

.drawer-list {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px var(--gutter) 16px;
}

.drawer-list > li {
  border-bottom: 1px solid var(--line);
}

.drawer-list > li:last-child {
  border-bottom: 0;
}

.drawer-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 16px;
  color: var(--ink);
}

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

.site-main {
  display: block;
  min-width: 0;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 56px;
}

.page-container {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--pine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--gutter) 4px;
  font-size: 13px;
  color: var(--mist);
}

.breadcrumb-list > li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-list > li + li::before {
  content: "/";
  color: var(--line);
}

.breadcrumb-list a {
  color: var(--mist);
}

/* 页面标题区 */
.page-header {
  padding: 10px 0 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
}

/* 页脚 */
.site-footer {
  margin-top: 48px;
  padding: 40px 0 24px;
  background: var(--wash);
  border-top: 1px solid var(--line);
  color: var(--ink);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.6fr);
  gap: 32px 48px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-brand {
  min-width: 0;
}

.footer-logo {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 34em;
}

.footer-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
  min-width: 0;
}

.footer-col {
  min-width: 0;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--mist);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--pine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  max-width: var(--shell);
  margin: 28px auto 0;
  padding: 16px var(--gutter) 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-bottom p {
  max-width: 60em;
}

.footer-copyright {
  margin-top: 6px;
}

/* --------------------------------------------------------------------------
   3. 组件 components
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--clay);
  border-color: var(--clay);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #A94F22;
  border-color: #A94F22;
  color: #fff;
}

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

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

/* 区块标题 */
.section-head {
  margin-bottom: 20px;
}

.section-head h2 {
  font-size: 22px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 60em;
}

.text-link {
  font-size: 14px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

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

/* 表格通用滚动容器 */
.table-wrap,
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

/* 折叠问答 */
details.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}

details.faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  line-height: 1.6;
}

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

details.faq-item summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 18px;
  color: var(--clay);
  font-weight: 700;
  line-height: 1.6;
}

details.faq-item[open] summary::before {
  content: "−";
}

details.faq-item summary:hover {
  color: var(--pine);
}

.faq-answer {
  padding: 0 0 16px 28px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.faq-answer p + p {
  margin-top: 10px;
}

/* 图片容器 */
figure {
  margin: 0;
}

.channel-figure,
.card-figure,
.collection-cover,
.guide-figure,
.faq-figure,
.note-figure,
.policy-figure,
.hero-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--wash);
}

.channel-figure img,
.card-figure img,
.collection-cover img,
.guide-figure img,
.faq-figure img,
.note-figure img,
.policy-figure img,
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  padding: 8px 0 0;
}

/* --------------------------------------------------------------------------
   4. 页面 pages
   -------------------------------------------------------------------------- */

/* ---------- 4.1 首页 ---------- */

.home-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
  gap: 32px 40px;
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--clay);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero-copy h1 {
  font-size: 36px;
  line-height: 1.28;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 34em;
  margin-bottom: 22px;
}

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

.hero-panel {
  min-width: 0;
  padding: 20px 22px;
  background: var(--wash);
  border-radius: var(--radius);
  border-left: 3px solid var(--pine);
}

.panel-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 12px;
}

.confirm-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

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

.confirm-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--pine);
  border-radius: 50%;
}

.panel-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.hero-figure {
  grid-column: 1 / -1;
  aspect-ratio: 16 / 7;
  max-height: 320px;
}

/* 口径条 */
.scope-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.scope-item {
  min-width: 0;
  padding: 22px 20px 22px 0;
}

.scope-item + .scope-item {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.scope-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--pine);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.scope-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 类别锚点条 */
.anchor-bar {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 36px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.anchor-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--paper);
  min-width: 0;
}

.anchor-cell:hover,
.anchor-cell:focus-visible {
  background: var(--wash);
}

.anchor-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--pine);
  line-height: 1.4;
}

.anchor-desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* 频道菜单长列表 */
.channel-menu {
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.channel-block {
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.channel-block:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.channel-name {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.channel-range {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 60em;
  margin-bottom: 16px;
}

.entry-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.entry-row {
  display: grid;
  grid-template-columns: minmax(0, 15em) minmax(0, 1fr) 6.5em 8em;
  align-items: baseline;
  gap: 8px 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
}

.entry-title {
  font-weight: 600;
  color: var(--ink);
}

.entry-desc {
  color: var(--mist);
  font-size: 14px;
}

.entry-time {
  font-size: 13px;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.entry-link {
  font-size: 13px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
  justify-self: start;
  white-space: nowrap;
}

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

.channel-block .channel-figure {
  margin-top: 20px;
  aspect-ratio: 16 / 6;
  max-height: 260px;
}

/* 专题片单预览 */
.collection-preview {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.collection-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.collection-card .card-figure {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius) var(--radius) 0 0;
}

.card-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  padding: 14px 16px 6px;
}

.card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  padding: 0 16px 8px;
  flex: 1 1 auto;
}

.card-range {
  font-size: 13px;
  line-height: 1.7;
  color: var(--pine);
  padding: 0 16px 12px;
  font-variant-numeric: tabular-nums;
}

.card-link {
  align-self: flex-start;
  margin: 0 16px;
  font-size: 14px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

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

/* 更新公告预览 */
.updates-preview {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.ledger-table {
  min-width: 560px;
  font-size: 14px;
}

.ledger-table thead th {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pine);
  background: var(--wash);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.ledger-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
  color: var(--ink);
}

.ledger-table tbody tr:last-child td {
  border-bottom: 0;
}

.ledger-table tbody td:first-child {
  font-weight: 600;
  white-space: nowrap;
}

.ledger-table tbody td:nth-child(3) {
  color: var(--mist);
}

.section-more {
  margin-top: 14px;
  font-size: 14px;
}

/* 编选与边界说明 */
.boundary-note {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 32px 48px;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-copy {
  min-width: 0;
}

.boundary-copy h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 12px;
}

.boundary-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 34em;
}

.boundary-copy p + p {
  margin-top: 12px;
}

.boundary-check {
  min-width: 0;
  padding: 18px 20px;
  background: var(--wash);
  border-radius: var(--radius);
  border-left: 3px solid var(--pine);
}

.boundary-check h3,
.boundary-check .check-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.check-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--pine);
  border-radius: 50%;
}

/* 常见问答摘要 */
.faq-preview {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

/* 站点信息收束 */
.site-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding: 40px 0 0;
}

.summary-col {
  min-width: 0;
}

.summary-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--pine);
  margin-bottom: 8px;
}

.summary-col p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.summary-col p + p {
  margin-top: 6px;
}

.summary-col a {
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.summary-col a:hover,
.summary-col a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 4.2 内页通用区块 ---------- */

.page-title-block,
.page-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  gap: 24px 40px;
  align-items: start;
  padding: 0 0 28px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.page-title-main,
.page-head-text,
.page-title-text {
  min-width: 0;
  max-width: var(--prose);
}

.page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-title-aside,
.page-head-meta,
.page-head-note,
.page-title-meta {
  min-width: 0;
  padding: 14px 16px;
  background: var(--wash);
  border-radius: var(--radius);
  border-left: 3px solid var(--pine);
}

.aside-label,
.meta-label,
.note-label,
.meta-line {
  font-size: 13px;
  font-weight: 600;
  color: var(--pine);
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}

.aside-text,
.meta-value,
.note-value,
.meta-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.meta-value {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.meta-note {
  margin-top: 6px;
}

/* 相关栏目入口 */
.related-block,
.related-links,
.related-section,
.cross-links {
  padding: 32px 0 0;
  margin-top: 32px;
  border-top: 1px solid var(--line);
}

.related-block h2,
.related-links h2,
.related-section h2,
.cross-links-title {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.related-lead {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  margin-bottom: 14px;
  max-width: 60em;
}

.related-links ul,
.related-list,
.related-section .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding: 0;
  margin: 0;
  border: 0;
}

.related-links > li,
.related-list > li {
  min-width: 0;
}

.related-links a,
.related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.related-links a:hover,
.related-links a:focus-visible,
.related-list a:hover,
.related-list a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 4.3 频道索引 ---------- */

.channel-anchor-bar {
  position: sticky;
  top: 68px;
  z-index: 20;
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.channel-anchor-bar .page-container {
  padding: 0;
}

.anchor-nav {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.anchor-list {
  display: flex;
  gap: 0;
  min-width: max-content;
}

.anchor-list > li {
  border-right: 1px solid var(--line);
}

.anchor-list > li:first-child {
  border-left: 1px solid var(--line);
}

.anchor-link {
  display: flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
}

.anchor-link:hover,
.anchor-link:focus-visible {
  background: var(--wash);
  color: var(--pine);
}

.channel-section {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: 28px 40px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.channel-section:first-of-type {
  padding-top: 8px;
}

.channel-media {
  min-width: 0;
}

.channel-section .channel-figure {
  aspect-ratio: 4 / 3;
}

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

.channel-body h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.channel-scope {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  margin-bottom: 16px;
  max-width: 46em;
}

.channel-body .entry-list {
  border-top: 1px solid var(--line);
}

.channel-body .entry-row {
  grid-template-columns: minmax(0, 12em) minmax(0, 1fr) 5.5em 6.5em;
  gap: 6px 16px;
  padding: 11px 0;
}

.entry-duration {
  font-size: 13px;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.entry-guide {
  font-size: 13px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
  justify-self: start;
  white-space: nowrap;
}

.entry-guide:hover,
.entry-guide:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 4.4 专题片单 ---------- */

.collection-list {
  display: flex;
  flex-direction: column;
}

.collection-item {
  display: grid;
  grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  gap: 28px 40px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.collection-item:first-child {
  padding-top: 8px;
}

.collection-item-reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
}

.collection-item-reverse .collection-cover {
  order: 2;
}

.collection-item-reverse .collection-body {
  order: 1;
}

.collection-cover {
  aspect-ratio: 16 / 10;
}

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

.collection-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--clay);
  margin-bottom: 8px;
}

.collection-body h2,
.collection-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.collection-reason {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 12px;
  max-width: 46em;
}

.collection-facts {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.collection-facts > li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.collection-facts strong {
  color: var(--ink);
  font-weight: 600;
}

.collection-link {
  font-size: 14px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

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

.relation-block {
  padding: 32px 0 0;
  margin-top: 32px;
  border-top: 1px solid var(--line);
}

.relation-block h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 12px;
}

.relation-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 46em;
}

.relation-block p + p {
  margin-top: 10px;
}

.relation-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.relation-points > li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.relation-points > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--pine);
  border-radius: 50%;
}

.cross-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
}

.cross-links-title {
  flex: 0 0 auto;
  font-size: 16px;
  margin-bottom: 0;
}

.cross-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.cross-links a:hover,
.cross-links a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 4.5 观看指南 ---------- */

.guide-section {
  max-width: var(--prose);
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.guide-section:first-of-type {
  padding-top: 8px;
}

.guide-section h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.section-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  margin-bottom: 18px;
}

.guide-section .check-list {
  counter-reset: guide-step;
  gap: 16px;
}

.guide-section .check-item {
  position: relative;
  padding-left: 34px;
}

.guide-section .check-item::before {
  counter-increment: guide-step;
  content: counter(guide-step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--pine);
  border: 1px solid var(--pine);
  border-radius: 50%;
  font-variant-numeric: tabular-nums;
}

.guide-section .check-item h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 4px;
}

.guide-section .check-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.guide-figure {
  aspect-ratio: 16 / 8;
  margin-bottom: 20px;
}

.entry-type-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.entry-type-item {
  padding: 16px 18px;
  background: var(--wash);
  border-radius: var(--radius);
  border-left: 3px solid var(--pine);
}

.entry-type-item h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 6px;
}

.entry-type-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.compare-table {
  min-width: 520px;
  font-size: 14px;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--mist);
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}

.compare-table thead th {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pine);
  background: var(--wash);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.compare-table tbody th {
  padding: 12px 16px;
  width: 40%;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.compare-table tbody td {
  padding: 12px 16px;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

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

.guide-section > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 46em;
}

.guide-section > p + p {
  margin-top: 10px;
}

.tip-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.tip-list > li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.tip-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--pine);
  border-radius: 50%;
}

/* ---------- 4.6 内容说明 ---------- */

.policy-summary {
  padding: 22px 24px;
  background: var(--wash);
  border-radius: var(--radius);
  border-left: 3px solid var(--pine);
  margin-bottom: 32px;
  max-width: var(--prose);
}

.policy-summary-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 8px;
}

.policy-summary-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.policy-summary-scope {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.audience-section {
  max-width: var(--prose);
  padding: 0 0 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.audience-section h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.audience-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  margin-bottom: 16px;
}

.audience-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.audience-list > li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.audience-list h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--pine);
  margin-bottom: 4px;
}

.audience-list p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.policy-body {
  max-width: var(--prose);
}

.policy-group {
  padding: 0 0 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.policy-group h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 14px;
}

.policy-clause + .policy-clause {
  margin-top: 16px;
}

.policy-clause h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--pine);
  margin-bottom: 4px;
}

.policy-clause p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.policy-figure {
  aspect-ratio: 16 / 8;
  margin: 16px 0;
}

/* ---------- 4.7 更新公告 ---------- */

.section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section:first-of-type {
  padding-top: 8px;
}

.notice-section .section-head,
.record-section .section-head,
.notes-section .section-head,
.related-section .section-head {
  margin-bottom: 20px;
}

.notice-list {
  display: flex;
  flex-direction: column;
  max-width: var(--prose);
}

.notice-item {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 6px 20px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}

.notice-item:last-child {
  border-bottom: 1px solid var(--line);
}

.notice-batch {
  font-size: 13px;
  font-weight: 600;
  color: var(--clay);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.7;
  padding-top: 2px;
}

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

.notice-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 4px;
}

.notice-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.record-table {
  min-width: 620px;
  font-size: 14px;
}

.record-table thead th {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pine);
  background: var(--wash);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.record-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
  color: var(--ink);
}

.record-table tbody tr:last-child td {
  border-bottom: 0;
}

.record-table tbody td:first-child {
  font-weight: 600;
  white-space: nowrap;
}

.record-table tbody td:nth-child(3) {
  color: var(--mist);
}

.note-article {
  max-width: var(--prose);
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.note-article:last-child {
  border-bottom: 1px solid var(--line);
}

.note-article h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 10px;
}

.note-article p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.note-article p + p {
  margin-top: 10px;
}

.note-figure {
  aspect-ratio: 16 / 8;
  margin-top: 16px;
}

/* ---------- 4.8 常见问答 ---------- */

.faq-group {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.faq-group:first-of-type {
  padding-top: 8px;
}

.faq-group-head {
  margin-bottom: 14px;
  max-width: var(--prose);
}

.faq-group-head h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.faq-group-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.faq-group-desc a {
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.faq-group-desc a:hover,
.faq-group-desc a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

.faq-list {
  max-width: var(--prose);
  border-top: 1px solid var(--line);
}

.faq-figure {
  aspect-ratio: 16 / 7;
  max-width: var(--prose);
  margin-bottom: 18px;
}

.faq-return {
  padding: 32px 0 0;
  margin-top: 32px;
  border-top: 1px solid var(--line);
}

.return-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 12px;
}

.return-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.return-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.return-links a:hover,
.return-links a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 4.9 404 ---------- */

.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 56px;
}

.error-panel {
  max-width: var(--prose);
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--clay);
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}

.error-panel h1 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
  margin-bottom: 20px;
}

.error-tips {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.error-tips > li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.error-tips > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--pine);
  border-radius: 50%;
}

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

.error-related {
  padding: 32px 0 0;
}

.error-related h2 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.error-related p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  margin-bottom: 14px;
  max-width: 60em;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.error-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
  color: var(--pine);
  border-bottom: 1px solid var(--line);
}

.error-links a:hover,
.error-links a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* --------------------------------------------------------------------------
   5. 响应式 responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px 32px;
  }

  .hero-copy h1 {
    font-size: 32px;
  }

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

  .scope-item:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .scope-item:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .anchor-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .channel-section {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: 24px 32px;
  }

  .channel-body .entry-row {
    grid-template-columns: minmax(0, 10em) minmax(0, 1fr) 5em;
  }

  .channel-body .entry-row .entry-guide {
    grid-column: 2 / -1;
    justify-self: start;
  }

  .collection-item,
  .collection-item-reverse {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    gap: 24px 32px;
  }

  .collection-item-reverse .collection-cover {
    order: 0;
  }

  .collection-item-reverse .collection-body {
    order: 0;
  }

  .page-title-block,
  .page-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    gap: 20px 32px;
  }
}

@media (max-width: 900px) {
  .nav-list {
    gap: 0;
  }

  .nav-link {
    padding: 0 8px;
    font-size: 14px;
  }
}

@media (max-width: 768px) {
  /* 移动端导航：按钮显示，桌面列表默认收起 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
  }

  .nav-list.is-open {
    display: flex;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px 0 28px;
  }

  .hero-copy h1 {
    font-size: 28px;
  }

  .hero-figure {
    aspect-ratio: 16 / 9;
    max-height: none;
  }

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

  .scope-item,
  .scope-item + .scope-item {
    padding: 16px 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .scope-item:first-child {
    border-top: 0;
  }

  .anchor-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 22px 0 28px;
  }

  .entry-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
    padding: 12px 0;
  }

  .entry-row .entry-title {
    grid-column: 1 / 2;
  }

  .entry-row .entry-time {
    grid-column: 2 / 3;
    text-align: right;
  }

  .entry-row .entry-desc {
    grid-column: 1 / -1;
  }

  .entry-row .entry-link {
    grid-column: 1 / -1;
  }

  .channel-block .channel-figure {
    aspect-ratio: 16 / 9;
    max-height: none;
  }

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

  .boundary-note {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px 0;
  }

  .site-summary {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 28px 0 0;
  }

  .page-title-block,
  .page-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding-bottom: 22px;
    margin-bottom: 24px;
  }

  .page-title {
    font-size: 26px;
    line-height: 1.35;
  }

  .channel-anchor-bar {
    top: 60px;
  }

  .channel-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .channel-section .channel-figure {
    aspect-ratio: 16 / 9;
  }

  .channel-body .entry-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .channel-body .entry-row .entry-guide {
    grid-column: 1 / -1;
  }

  .collection-item,
  .collection-item-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 24px 0;
  }

  .collection-cover {
    aspect-ratio: 16 / 9;
  }

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

  .footer-map {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 20px 24px;
  }

  .error-panel {
    padding: 36px 0 28px;
  }

  .error-panel h1 {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 16px;
  }

  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .brand {
    font-size: 19px;
  }

  .hero-copy h1 {
    font-size: 25px;
  }

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

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

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

  .channel-name {
    font-size: 18px;
  }

  .section-head h2,
  .boundary-copy h2,
  .channel-body h2,
  .guide-section h2,
  .audience-section h2,
  .policy-group h2,
  .faq-group-head h2,
  .relation-block h2,
  .related-block h2,
  .related-links h2,
  .related-section h2 {
    font-size: 20px;
  }

  .notice-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .related-links ul,
  .related-list,
  .return-links,
  .error-links {
    flex-direction: column;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}