/* ==========================================================================
   base —— 变量、重置与全站基础排版
   ========================================================================== */

:root {
  --paper: #F4EEE3;
  --paper-light: #FCFAF5;
  --ink: #211E1B;
  --terracotta: #A9512C;
  --indigo: #2B4750;
  --smoke: #7A6E5D;
  --wheat: #D8CCB8;
  --clay-green: #5C7A63;
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shell: 1160px;
  --gutter: 32px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0 0 14px;
}

p:last-child {
  margin-bottom: 0;
}

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

a {
  color: var(--terracotta);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease;
}

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--smoke);
}

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

:focus-visible {
  outline: 2px solid var(--terracotta);
  outline-offset: 2px;
}

/* ==========================================================================
   layout —— 站点骨架：页头 / 主导航 / 主容器 / 页脚
   ========================================================================== */

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

.site-header {
  position: relative;
  background-color: var(--paper);
  border-bottom: 1px solid var(--wheat);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter);
}

.brand {
  flex: 0 0 auto;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  white-space: nowrap;
}

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

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px 20px;
}

.site-nav a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--terracotta);
  border-bottom-color: var(--wheat);
}

.site-nav a.is-current {
  color: var(--terracotta);
  border-bottom-color: var(--terracotta);
}

.menu-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--wheat);
  border-radius: 4px;
  position: relative;
}

.menu-toggle::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 12px;
  width: 18px;
  height: 2px;
  background-color: var(--ink);
  box-shadow: 0 6px 0 var(--ink), 0 12px 0 var(--ink);
}

.menu-toggle[aria-expanded="true"]::before {
  top: 20px;
  box-shadow: none;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"]::after {
  content: "";
  position: absolute;
  top: 20px;
  left: 12px;
  width: 18px;
  height: 2px;
  background-color: var(--ink);
  transform: rotate(-45deg);
}

.sub-nav {
  display: none;
  border-top: 1px solid var(--wheat);
  background-color: var(--paper-light);
}

.sub-nav ul {
  display: flex;
  gap: 8px;
  padding: 10px 20px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.sub-nav a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 14px;
  white-space: nowrap;
  color: var(--smoke);
  border: 1px solid var(--wheat);
  border-radius: 4px;
}

.sub-nav a.is-current {
  color: var(--paper-light);
  background-color: var(--terracotta);
  border-color: var(--terracotta);
}

.site-main {
  display: block;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.inner-main {
  padding-top: 24px;
  padding-bottom: 56px;
}

/* 面包屑 */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--smoke);
}

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

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

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

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

/* 内页标题区 */

.page-header {
  padding-bottom: 4px;
}

.page-title {
  font-size: 40px;
  line-height: 1.3;
  color: var(--ink);
}

/* 页脚 */

.site-footer {
  margin-top: 48px;
  background-color: var(--paper-light);
  border-top: 1px solid var(--wheat);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(4, minmax(140px, 1fr));
  gap: 32px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px var(--gutter) 28px;
}

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

.footer-logo {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.footer-slogan {
  font-size: 14px;
  color: var(--terracotta);
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--smoke);
  max-width: 30ch;
}

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

.footer-group-title {
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--indigo);
}

.footer-toggle {
  display: none;
}

.footer-links {
  display: block;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  color: var(--smoke);
  border-bottom: 1px solid transparent;
}

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

.footer-bottom {
  border-top: 1px solid var(--wheat);
}

.footer-bottom p {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter);
  font-size: 13px;
  color: var(--smoke);
}

/* ==========================================================================
   components —— 通用模块：编号章、状态标签、图片容器、列表行、折叠问答
   ========================================================================== */

.stamp,
.stamp-code,
.number-stamp,
.num-stamp,
.title-stamp,
.title-seal {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--terracotta);
  border: 1px solid var(--terracotta);
  border-radius: 3px;
  background-color: var(--paper-light);
  line-height: 1.5;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  background-color: var(--clay-green);
  border-radius: 50%;
  vertical-align: middle;
}

.status-tag,
.record-status,
.batch-state {
  display: inline-block;
  padding: 1px 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  border-radius: 3px;
  border: 1px solid var(--wheat);
  color: var(--indigo);
  background-color: var(--paper);
  white-space: nowrap;
}

.record-status.is-verified,
.status-verified,
.status-done {
  color: var(--paper-light);
  background-color: var(--clay-green);
  border-color: var(--clay-green);
}

.record-status.is-editing,
.status-editing,
.status-doing {
  color: var(--paper-light);
  background-color: var(--indigo);
  border-color: var(--indigo);
}

.record-status.is-pending,
.status-pending,
.status-todo {
  color: var(--terracotta);
  background-color: var(--paper-light);
  border-color: var(--terracotta);
}

.record-status.is-adjusting,
.status-adjusting,
.status-adjust {
  color: var(--smoke);
  background-color: var(--paper);
  border-color: var(--smoke);
}

.section-intro,
.section-lead,
.mapping-intro,
.diff-intro {
  max-width: 62ch;
  margin-bottom: 20px;
  font-size: 15px;
  color: var(--smoke);
}

/* 图片容器统一约束 */

.hero-media,
.topic-media,
.reel-card,
.section-media,
.media-figure,
.project-figure,
.field-figure,
.qa-figure {
  overflow: hidden;
  border: 1px solid var(--wheat);
  border-radius: 6px;
  background-color: var(--paper-light);
}

.hero-media img,
.topic-media img,
.reel-card img,
.section-media img,
.media-figure img,
.project-figure img,
.field-figure img,
.qa-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 折叠问答 */

.faq-item {
  border-top: 1px solid var(--wheat);
}

.faq-item:last-of-type {
  border-bottom: 1px solid var(--wheat);
}

.faq-item summary {
  position: relative;
  padding: 16px 40px 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 20px;
  color: var(--terracotta);
  line-height: 1;
}

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

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

.faq-answer {
  padding: 0 0 18px;
  font-size: 15px;
  color: var(--ink);
  max-width: 68ch;
}

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

/* ==========================================================================
   pages —— 首页
   ========================================================================== */

.home-main {
  padding-top: 0;
  padding-bottom: 24px;
}

/* 公告条 */

.announcement {
  border-bottom: 1px solid var(--wheat);
}

.announcement-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 12px 0;
  font-size: 14px;
  color: var(--smoke);
}

.announcement-inner p {
  margin: 0;
}

.announcement-status {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--indigo);
}

.announcement-rule {
  color: var(--ink);
}

.announcement-hint {
  text-align: right;
  color: var(--smoke);
}

/* 首屏焦点区 */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 48px;
  align-items: center;
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--wheat);
}

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

.hero-eyebrow {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
}

.hero-text h1 {
  margin-bottom: 18px;
  font-size: 40px;
  line-height: 1.3;
}

.hero-lead {
  max-width: 34em;
  font-size: 17px;
  color: var(--ink);
}

.hero-note {
  max-width: 34em;
  font-size: 14px;
  color: var(--smoke);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.btn-primary,
.btn-ghost {
  display: inline-block;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  line-height: 22px;
  border-radius: 4px;
  border: 1px solid var(--terracotta);
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn-primary {
  color: var(--paper-light);
  background-color: var(--terracotta);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--paper-light);
  background-color: var(--indigo);
  border-color: var(--indigo);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--indigo);
  border-color: var(--indigo);
}

.hero-media {
  position: relative;
}

.hero-media .stamp {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.hero-media img {
  aspect-ratio: 4 / 3;
}

.hero-media figcaption {
  padding: 0 12px 10px;
  margin-top: 10px;
}

/* 频道标签轨道 */

.channel-tabs {
  padding: 16px 0;
  border-bottom: 1px solid var(--wheat);
}

.channel-tabs ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.channel-tabs a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--ink);
  border: 1px solid var(--wheat);
  border-radius: 4px;
  background-color: var(--paper-light);
}

.channel-tabs a:hover,
.channel-tabs a:focus-visible {
  color: var(--terracotta);
  border-color: var(--terracotta);
}

.channel-tabs .tab-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

/* 不对称双栏主体 */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 748px) minmax(0, 372px);
  gap: 40px;
  align-items: start;
  padding: 40px 0;
}

.main-column {
  min-width: 0;
}

.aside-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.main-column > section {
  margin-bottom: 40px;
}

.main-column > section:last-child {
  margin-bottom: 0;
}

.main-column h2,
.aside-column h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

/* 频道说明 */

.channel-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--wheat);
}

.channel-item:first-of-type {
  border-top: 1px solid var(--wheat);
}

.channel-no {
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

.channel-item h3 {
  margin-bottom: 6px;
  font-size: 18px;
}

.channel-scope {
  max-width: 62ch;
  font-size: 15px;
  color: var(--ink);
}

.channel-sample {
  max-width: 62ch;
  font-size: 14px;
  color: var(--smoke);
}

/* 重点专题 */

.topic-card {
  display: grid;
  grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--wheat);
}

.topic-card:first-of-type {
  border-top: 1px solid var(--wheat);
}

.topic-media {
  position: relative;
  align-self: start;
}

.topic-media .stamp {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
}

.topic-media img {
  aspect-ratio: 4 / 3;
}

.topic-media figcaption {
  padding: 0 10px 8px;
  margin-top: 8px;
}

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

.topic-body h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.topic-lead {
  font-size: 15px;
  color: var(--ink);
}

.topic-points {
  margin-top: 10px;
}

.topic-points li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--smoke);
}

.topic-points li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 6px;
  height: 6px;
  background-color: var(--wheat);
  border-radius: 1px;
}

/* 编目记录摘录 */

.record-list {
  border-top: 1px solid var(--wheat);
}

.record-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1.6fr) 84px 76px minmax(0, 1.4fr);
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--wheat);
  font-size: 14px;
  transition: border-color 160ms ease;
}

.record-row:hover {
  border-bottom-color: var(--terracotta);
}

.record-no {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--terracotta);
}

.record-name {
  color: var(--ink);
  min-width: 0;
}

.record-channel {
  font-size: 13px;
  color: var(--indigo);
}

.record-note {
  font-size: 13px;
  color: var(--smoke);
  min-width: 0;
}

.record-more,
.batch-more {
  margin-top: 14px;
  text-align: right;
  font-size: 14px;
}

.record-more a::after,
.batch-more a::after,
.reel-link::after {
  content: " →";
  font-family: var(--mono);
}

/* 侧栏模块 */

.side-block {
  padding: 20px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-radius: 6px;
}

.side-title {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--indigo);
  font-family: var(--sans);
}

.prep-list li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--wheat);
}

.prep-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.prep-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--terracotta);
  line-height: 1.7;
}

.prep-list p {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
}

.verify-block {
  padding: 20px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-left: 3px solid var(--indigo);
  border-radius: 6px;
}

.verify-block .side-title {
  color: var(--indigo);
}

.verify-block p {
  font-size: 14px;
  color: var(--ink);
}

.verify-link {
  margin-top: 10px;
  font-size: 14px;
}

.batch-list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--wheat);
}

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

.batch-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--terracotta);
  line-height: 1.7;
}

.batch-list p {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
}

.batch-state {
  grid-column: 2;
  justify-self: start;
  font-size: 11px;
}

/* 专题片单预览 */

.reel-preview {
  padding: 40px 0;
  border-top: 1px solid var(--wheat);
}

.reel-preview h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.reel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.reel-card {
  display: flex;
  flex-direction: column;
  padding: 0 0 16px;
}

.reel-card img {
  aspect-ratio: 16 / 10;
  border-bottom: 1px solid var(--wheat);
}

.reel-no {
  margin: 14px 16px 4px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

.reel-card h3 {
  margin: 0 16px 6px;
  font-size: 18px;
}

.reel-desc {
  margin: 0 16px 12px;
  font-size: 14px;
  color: var(--smoke);
  flex: 1 1 auto;
}

.reel-link {
  margin: 0 16px;
  font-size: 14px;
}

/* 答疑摘要 */

.faq-digest {
  padding: 40px 0 8px;
  border-top: 1px solid var(--wheat);
}

.faq-digest h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.faq-digest .faq-item:first-of-type {
  margin-top: 16px;
}

/* ==========================================================================
   pages —— 内页通用
   ========================================================================== */

.page-title {
  margin-bottom: 14px;
}

.page-title + .page-title,
.page-header + .page-title {
  margin-top: 0;
}

section.page-title,
section.page-title-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-bottom: 24px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--wheat);
}

section.page-title p,
section.page-title-block p {
  flex-basis: 100%;
  margin: 0;
}

.page-summary,
.title-summary {
  font-size: 16px;
  color: var(--ink);
  max-width: 68ch;
}

.page-purpose,
.title-purpose {
  font-size: 14px;
  color: var(--smoke);
}

.section {
  margin-bottom: 40px;
}

.section h2,
.content-block h2,
.content-article h2,
.project-block h2,
.project-mapping h2,
.project-diff h2,
.qa-view h2,
.submit-note h2,
.view-tabs-block h2,
.field-section h2,
.misread-section h2,
.boundary-section h2,
.related-links h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.section h3,
.content-article h3,
.project-block h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

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

.section-media img {
  aspect-ratio: 16 / 9;
}

.section-media figcaption,
.media-figure figcaption,
.project-figure figcaption,
.field-figure figcaption,
.qa-figure figcaption {
  padding: 0 12px 10px;
  margin-top: 10px;
}

/* 侧栏块（内页 aside） */

.aside-block {
  padding: 20px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-radius: 6px;
}

.aside-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 12px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--indigo);
}

.aside-index {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--terracotta);
}

.aside-block p {
  font-size: 14px;
}

/* ==========================================================================
   pages —— 年度概览
   ========================================================================== */

.intro-section p {
  max-width: 62ch;
}

.channel-distribution .channel-list {
  border-top: 1px solid var(--wheat);
}

.channel-distribution .channel-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--wheat);
}

.channel-code {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

.channel-name {
  margin-bottom: 6px;
  font-size: 18px;
}

.channel-desc {
  max-width: 62ch;
  font-size: 15px;
}

.channel-direction {
  max-width: 62ch;
  font-size: 14px;
  color: var(--smoke);
}

.focus-list {
  border-top: 1px solid var(--wheat);
}

.focus-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--wheat);
}

.focus-index {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 20px;
  color: var(--terracotta);
  line-height: 1.4;
}

.focus-name {
  margin: 0;
  font-size: 18px;
}

.focus-reason {
  margin: 0;
  font-size: 15px;
  color: var(--smoke);
  max-width: 62ch;
}

.status-summary {
  border-top: 1px solid var(--wheat);
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--wheat);
}

.status-note {
  font-size: 14px;
  color: var(--smoke);
}

.reader-note p {
  color: var(--ink);
}

.status-table {
  margin: 0;
}

.status-table dt {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--indigo);
  margin-top: 10px;
}

.status-table dt:first-child {
  margin-top: 0;
}

.status-table dd {
  margin: 2px 0 0;
  font-size: 14px;
  color: var(--smoke);
}

.link-list li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--wheat);
}

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

.link-list a {
  font-size: 14px;
}

/* ==========================================================================
   pages —— 重点专题
   ========================================================================== */

.project-block {
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--wheat);
}

.project-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.project-head h2 {
  margin: 0;
}

.project-figure {
  margin-bottom: 16px;
}

.project-figure img {
  aspect-ratio: 16 / 9;
}

.project-position {
  font-size: 16px;
  max-width: 62ch;
}

.project-scope {
  margin-top: 16px;
}

.project-scope p {
  max-width: 62ch;
  font-size: 15px;
}

.project-composition {
  margin-top: 16px;
}

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

.entry-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--wheat);
  font-size: 15px;
}

.project-mapping {
  margin-bottom: 32px;
}

.mapping-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background-color: var(--paper-light);
}

.mapping-table caption {
  caption-side: top;
  padding-bottom: 8px;
  font-size: 13px;
  color: var(--smoke);
  text-align: left;
}

.mapping-table th,
.mapping-table td {
  padding: 10px 12px;
  border: 1px solid var(--wheat);
  text-align: left;
  vertical-align: top;
}

.mapping-table th {
  font-family: var(--sans);
  font-weight: 600;
  color: var(--indigo);
  background-color: var(--paper);
}

.mapping-table td {
  color: var(--ink);
}

.project-diff {
  margin-bottom: 8px;
}

.diff-list {
  border-top: 1px solid var(--wheat);
}

.diff-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--wheat);
}

.diff-list h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.diff-list p {
  margin: 0;
  font-size: 15px;
  color: var(--smoke);
  max-width: 62ch;
}

.aside-link-list li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--wheat);
}

.aside-link-list li:last-child {
  border-bottom: 0;
}

.aside-link-list a {
  font-size: 14px;
}

.aside-link-list--arrow a::after {
  content: " →";
  font-family: var(--mono);
}

/* ==========================================================================
   pages —— 编目记录
   ========================================================================== */

.content-block {
  margin-bottom: 36px;
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block > p {
  max-width: 62ch;
  font-size: 15px;
}

.media-figure {
  margin: 16px 0;
}

.media-figure img {
  aspect-ratio: 16 / 9;
}

.code-example {
  margin: 16px 0;
  padding: 14px 16px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-left: 3px solid var(--terracotta);
  border-radius: 4px;
}

.code-example-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--ink);
}

.code-example-line:last-child {
  margin-bottom: 0;
}

.code-prefix {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
}

.catalog-record .record-list,
.catalog-record .record-row {
  font-size: 14px;
}

.catalog-record .record-row {
  grid-template-columns: 78px minmax(0, 1.5fr) 84px 76px minmax(0, 1.4fr);
}

.record-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--terracotta);
}

.record-title {
  color: var(--ink);
  min-width: 0;
}

.record-footnote {
  margin-top: 14px;
  font-size: 13px;
  color: var(--smoke);
}

.status-list {
  margin: 0;
}

.status-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--wheat);
}

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

.status-item dt {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--indigo);
  margin-bottom: 2px;
}

.status-item dd {
  margin: 0;
  font-size: 14px;
  color: var(--smoke);
}

.check-list {
  margin: 10px 0;
}

.check-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--ink);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 6px;
  height: 6px;
  background-color: var(--terracotta);
  border-radius: 1px;
}

.side-link {
  margin-top: 12px;
  font-size: 14px;
}

.related-links li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--wheat);
}

.related-links li:last-child {
  border-bottom: 0;
}

.related-links a {
  font-size: 14px;
}

/* ==========================================================================
   pages —— 数据说明（窄读单栏）
   ========================================================================== */

.narrow-layout {
  max-width: 820px;
  margin: 0 auto 40px;
}

.content-article {
  min-width: 0;
}

.field-section,
.misread-section,
.boundary-section {
  margin-bottom: 40px;
}

.field-section > p,
.misread-section > p,
.boundary-section > p {
  max-width: 68ch;
  font-size: 15px;
}

.field-list {
  margin-top: 20px;
  border-top: 1px solid var(--wheat);
}

.field-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--wheat);
}

.field-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.field-item p {
  max-width: 68ch;
  font-size: 15px;
  color: var(--smoke);
}

.field-figure {
  margin-top: 20px;
}

.field-figure img {
  aspect-ratio: 16 / 9;
}

.misread-list {
  margin-top: 16px;
  border-top: 1px solid var(--wheat);
}

.misread-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--wheat);
}

.misread-wrong {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--smoke);
  text-decoration: line-through;
  text-decoration-color: var(--wheat);
}

.misread-wrong::before {
  content: "误";
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--terracotta);
  text-decoration: none;
}

.misread-right {
  position: relative;
  padding-left: 18px;
  margin-top: 4px;
  font-size: 15px;
  color: var(--ink);
}

.misread-right::before {
  content: "正";
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--clay-green);
}

.boundary-section {
  padding: 20px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-left: 3px solid var(--indigo);
  border-radius: 6px;
}

.boundary-list {
  margin: 12px 0;
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 7px;
  height: 7px;
  background-color: var(--indigo);
  border-radius: 1px;
}

.data-notes .related-links {
  max-width: 820px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--wheat);
}

.data-notes .related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.data-notes .related-links li {
  padding: 0;
  border-bottom: 0;
}

/* ==========================================================================
   pages —— 更新安排
   ========================================================================== */

.page-layout.narrow-read {
  grid-template-columns: minmax(0, 1fr);
  max-width: 820px;
  margin: 0 auto;
}

.content-column {
  min-width: 0;
}

.batch-overview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 0;
}

.batch-overview li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 14px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-radius: 4px;
}

.batch-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--terracotta);
}

.batch-brief {
  color: var(--ink);
}

.batch-block {
  padding: 20px;
  margin-bottom: 28px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-radius: 6px;
}

.batch-block > p {
  max-width: 62ch;
  font-size: 15px;
}

.batch-detail {
  margin: 14px 0 0;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 16px;
}

.batch-detail dt {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--indigo);
  padding: 8px 0;
  border-top: 1px dashed var(--wheat);
}

.batch-detail dd {
  margin: 0;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink);
  border-top: 1px dashed var(--wheat);
}

.upcoming .related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--wheat);
}

.related-links-label {
  font-size: 14px;
  color: var(--smoke);
}

.related-links-item {
  font-size: 14px;
}

.adjust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 10px;
}

/* ==========================================================================
   pages —— 答疑台
   ========================================================================== */

.view-tabs-block {
  margin-bottom: 32px;
}

.view-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.view-tab {
  min-height: 44px;
  padding: 8px 20px;
  font-size: 15px;
  color: var(--terracotta);
  background-color: var(--paper-light);
  border: 1px solid var(--terracotta);
  border-radius: 4px;
  transition: background-color 160ms ease, color 160ms ease;
}

.view-tab:hover {
  color: var(--indigo);
  border-color: var(--indigo);
}

.view-tab.is-active {
  color: var(--paper-light);
  background-color: var(--terracotta);
  border-color: var(--terracotta);
}

.view-tab[aria-busy="true"] {
  opacity: 0.65;
  cursor: progress;
}

.view-tabs-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--smoke);
}

.qa-view {
  margin-bottom: 36px;
}

.qa-view[hidden] {
  display: none;
}

.qa-list {
  border-top: 1px solid var(--wheat);
}

.qa-item {
  border-bottom: 1px solid var(--wheat);
}

.qa-item summary {
  position: relative;
  padding: 16px 40px 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.qa-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 20px;
  color: var(--terracotta);
  line-height: 1;
}

.qa-item[open] summary::after {
  content: "−";
}

.qa-item summary:hover {
  color: var(--terracotta);
}

.qa-answer {
  padding: 0 0 18px;
  max-width: 68ch;
}

.qa-answer p {
  font-size: 15px;
  color: var(--ink);
}

.qa-ref {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--smoke);
}

.qa-figure {
  max-width: 520px;
  margin-bottom: 20px;
}

.qa-figure img {
  aspect-ratio: 16 / 9;
}

.submit-note {
  padding: 24px;
  background-color: var(--paper-light);
  border: 1px solid var(--wheat);
  border-left: 3px solid var(--indigo);
  border-radius: 6px;
}

.submit-note > p {
  max-width: 68ch;
  font-size: 15px;
}

.submit-checklist {
  margin: 14px 0;
}

.submit-checklist li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink);
}

.submit-checklist li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 7px;
  height: 7px;
  background-color: var(--terracotta);
  border-radius: 1px;
}

.submit-checklist strong {
  font-weight: 600;
  color: var(--indigo);
}

.submit-note-ref {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 14px;
  font-size: 14px;
}

/* ==========================================================================
   pages —— 404
   ========================================================================== */

.error-main {
  padding-top: 56px;
  padding-bottom: 56px;
}

.error-inner {
  max-width: 720px;
}

.error-code {
  font-family: var(--mono);
  font-size: 64px;
  letter-spacing: 0.06em;
  color: var(--terracotta);
  line-height: 1;
  margin-bottom: 16px;
}

.error-inner h1 {
  font-size: 40px;
  margin-bottom: 14px;
}

.error-lead {
  max-width: 58ch;
  font-size: 16px;
  color: var(--smoke);
  margin-bottom: 28px;
}

.error-block {
  margin-bottom: 28px;
}

.error-block h2 {
  font-size: 20px;
  margin-bottom: 10px;
}

.error-list {
  border-top: 1px solid var(--wheat);
}

.error-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--wheat);
  font-size: 14px;
}

.error-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--terracotta);
}

.error-mono {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  word-break: break-all;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.error-btn {
  display: inline-block;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  line-height: 22px;
  color: var(--terracotta);
  background-color: transparent;
  border: 1px solid var(--terracotta);
  border-radius: 4px;
}

.error-btn:hover,
.error-btn:focus-visible {
  color: var(--indigo);
  border-color: var(--indigo);
}

.error-btn-primary {
  color: var(--paper-light);
  background-color: var(--terracotta);
}

.error-btn-primary:hover,
.error-btn-primary:focus-visible {
  color: var(--paper-light);
  background-color: var(--indigo);
  border-color: var(--indigo);
}

/* ==========================================================================
   responsive —— 960px 与 640px 断点
   ========================================================================== */

@media (max-width: 960px) {
  .header-inner {
    gap: 16px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .sub-nav {
    display: block;
  }

  .sub-nav ul {
    padding: 10px 20px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px 0;
  }

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 32px 0;
  }

  .aside-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
  }

  .announcement-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .announcement-hint {
    text-align: left;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-desc {
    max-width: 46ch;
  }

  .mapping-table {
    font-size: 13px;
  }

  .mapping-table th,
  .mapping-table td {
    padding: 8px 10px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 20px;
  }

  body {
    font-size: 16px;
  }

  .header-inner {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand {
    font-size: 18px;
    white-space: normal;
  }

  .site-main {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

  .page-title,
  .error-inner h1 {
    font-size: 28px;
  }

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

  .hero-eyebrow {
    font-size: 12px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    gap: 10px;
  }

  .btn-primary,
  .btn-ghost {
    flex: 1 1 140px;
    text-align: center;
  }

  .channel-tabs ul {
    gap: 6px;
  }

  .channel-tabs a {
    padding: 8px 10px;
    font-size: 13px;
  }

  .main-column h2,
  .aside-column h2,
  .reel-preview h2,
  .faq-digest h2,
  .section h2,
  .content-block h2,
  .content-article h2,
  .project-block h2,
  .project-mapping h2,
  .project-diff h2,
  .qa-view h2,
  .submit-note h2,
  .view-tabs-block h2,
  .field-section h2,
  .misread-section h2,
  .boundary-section h2,
  .related-links h2 {
    font-size: 20px;
  }

  .topic-card {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding: 20px 0;
  }

  .topic-media img {
    aspect-ratio: 16 / 10;
  }

  .record-row,
  .catalog-record .record-row {
    grid-template-columns: 70px minmax(0, 1fr) 68px;
    gap: 4px 10px;
    align-items: start;
  }

  .record-name {
    grid-column: 2 / -1;
    grid-row: 1;
  }

  .record-no {
    grid-row: 1;
  }

  .record-channel {
    grid-column: 1 / 2;
    grid-row: 2;
  }

  .record-status {
    grid-column: 2 / 3;
    grid-row: 2;
    justify-self: start;
  }

  .record-note {
    grid-column: 1 / -1;
    grid-row: 3;
    font-size: 12px;
  }

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

  .reel-card img {
    aspect-ratio: 16 / 9;
  }

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

  .side-block,
  .verify-block,
  .aside-block,
  .batch-block,
  .submit-note {
    padding: 16px;
  }

  .focus-item {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .focus-index {
    font-size: 17px;
  }

  .mapping-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .batch-detail {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .batch-detail dt {
    border-top: 1px dashed var(--wheat);
    padding-bottom: 0;
  }

  .batch-detail dd {
    border-top: 0;
    padding-top: 2px;
  }

  .view-tab {
    flex: 1 1 auto;
    padding: 8px 12px;
    font-size: 14px;
  }

  .qa-item summary,
  .faq-item summary {
    padding-right: 34px;
    font-size: 15px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding-top: 24px;
    padding-bottom: 16px;
  }

  .footer-brand {
    padding-bottom: 16px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--wheat);
  }

  .footer-desc {
    max-width: none;
  }

  .footer-group {
    border-bottom: 1px solid var(--wheat);
  }

  .footer-group-title {
    display: none;
  }

  .footer-toggle {
    position: relative;
    display: block;
    width: 100%;
    min-height: 48px;
    padding: 12px 32px 12px 0;
    text-align: left;
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 600;
    color: var(--indigo);
    background-color: transparent;
    border: 0;
  }

  .footer-toggle::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 4px;
    transform: translateY(-50%);
    font-family: var(--mono);
    font-size: 18px;
    color: var(--terracotta);
    line-height: 1;
  }

  .footer-toggle[aria-expanded="true"]::after {
    content: "−";
  }

  .footer-links {
    display: none;
    padding-bottom: 12px;
  }

  .footer-links.is-open {
    display: block;
  }

  .footer-links li {
    margin-bottom: 0;
  }

  .footer-links a {
    display: block;
    min-height: 44px;
    padding: 9px 0;
    font-size: 14px;
  }

  .footer-bottom p {
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .error-code {
    font-size: 48px;
  }

  .error-btn {
    flex: 1 1 140px;
    text-align: center;
  }
}

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