/* ============================================================
   董小宛天美传媒 · 视频频道目录与专题观看指南资料站
   全站样式表
   ============================================================ */

/* ------------------------------------------------------------
   base · 基础变量与重置
   ------------------------------------------------------------ */
:root {
  --paper: #F3EFE3;
  --ink: #151515;
  --brick: #C4472D;
  --cobalt: #1E4C8A;
  --mustard: #D3A11F;
  --stone: #DCD5C3;
  --white: #FFFFFF;
  --ink-soft: #3b3b3b;
  --line: #151515;
  --line-soft: #c8c1b0;

  --font-head: "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-num: "DIN Alternate", "Arial Narrow", sans-serif;

  --wrap: 1180px;
  --main-col: 780px;
  --side-col: 320px;
  --gap-col: 40px;
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 0;
  line-height: 1.35;
}

p {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

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

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

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

/* ------------------------------------------------------------
   layout · 全站骨架
   ------------------------------------------------------------ */

/* 页头 */
.site-header {
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  position: relative;
  z-index: 30;
}

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

.brand-mark {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-mark:hover {
  color: var(--brick);
}

/* 主导航 */
.site-nav .main-nav,
.main-nav.site-nav {
  display: block;
}

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

.main-nav li {
  display: block;
}

.main-nav a {
  display: inline-block;
  padding: 8px 10px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}

.main-nav a:hover {
  color: var(--brick);
  border-bottom-color: var(--stone);
}

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

/* 汉堡按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: 0;
}

.menu-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

/* 移动端下拉导航 */
.mobile-nav {
  display: none;
  background: var(--white);
  border-bottom: 2px solid var(--ink);
}

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

.mobile-nav ul {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px 16px;
}

.mobile-nav li {
  border-bottom: 1px solid var(--stone);
}

.mobile-nav li:last-child {
  border-bottom: 0;
}

.mobile-nav a {
  display: block;
  padding: 13px 4px;
  font-size: 16px;
  color: var(--ink);
}

.mobile-nav a.is-current {
  color: var(--brick);
  font-weight: 600;
}

/* 主体容器 */
.site-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.site-main.inner-main {
  padding-bottom: 8px;
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

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

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

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

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

/* 内页标题区 */
.page-header {
  padding: 8px 0 0;
}

.page-title {
  font-size: 40px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.page-title-grid,
.page-title-inner,
.title-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 32px 40px;
  align-items: start;
  padding: 18px 0 0;
}

.page-title-main,
.page-title-copy,
.title-copy,
.title-main,
.title-primary {
  min-width: 0;
}

.section-label,
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-transform: uppercase;
  margin: 0 0 14px;
}

.label-num,
.tag-num {
  display: inline-block;
  padding: 2px 8px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-lead,
.title-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 640px;
  margin-top: 14px;
}

/* 元信息格 */
.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin: 0;
}

.meta-cell {
  background: var(--white);
  padding: 12px 14px;
  min-width: 0;
}

.meta-cell dt,
.meta-label {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--brick);
  font-weight: 600;
  margin: 0 0 4px;
}

.meta-cell dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

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

.title-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.title-meta .meta-cell {
  background: var(--white);
  padding: 12px 14px;
}

/* 标题区粗线 */
.title-rule {
  border: 0;
  border-top: 4px solid var(--ink);
  margin: 28px 0 0;
  height: 0;
}

/* 页脚 */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  margin-top: 56px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.4fr);
  gap: 32px 40px;
}

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

.footer-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(243, 239, 227, 0.28);
  letter-spacing: 0.04em;
}

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

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

.footer-col a {
  font-size: 14px;
  color: rgba(243, 239, 227, 0.85);
  line-height: 1.6;
}

.footer-col a:hover {
  color: var(--mustard);
}

.footer-about p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(243, 239, 227, 0.78);
  margin: 0 0 10px;
}

.footer-about p:last-child {
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(243, 239, 227, 0.2);
}

.footer-bottom p {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(243, 239, 227, 0.62);
}

/* 内容布局：主内容 + 右侧栏 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--side-col);
  gap: var(--gap-col);
  align-items: start;
  padding-top: 40px;
}

.page-layout > .primary {
  min-width: 0;
}

.page-layout > .side-note {
  min-width: 0;
}

/* ------------------------------------------------------------
   components · 通用组件
   ------------------------------------------------------------ */

/* 区块标题 */
.section-head {
  margin-bottom: 24px;
}

.section-head h2,
.section-heading {
  font-size: 26px;
  line-height: 1.35;
  font-weight: 700;
  margin: 0;
  padding-left: 14px;
  border-left: 5px solid var(--brick);
}

.section-head p,
.section-heading + .section-sub {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 10px 0 0;
}

.section-intro,
.section-lead,
.section-sub,
.section-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 10px 0 0;
}

.section-heading {
  margin-bottom: 6px;
}

/* 按钮 */
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 0;
  border: 2px solid var(--ink);
  line-height: 1.3;
}

.btn-primary {
  background: var(--brick);
  border-color: var(--brick);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
}

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

/* 数据表 */
.data-table,
.field-table,
.impact-table {
  width: 100%;
  font-size: 14px;
  line-height: 1.6;
  background: var(--white);
  border: 1px solid var(--line-soft);
}

.data-table caption,
.field-table caption,
.impact-table caption {
  text-align: left;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 0 0 8px;
  caption-side: top;
}

.data-table thead th,
.field-table thead th,
.impact-table thead th {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-align: left;
  padding: 11px 14px;
  border: 1px solid var(--ink);
  white-space: nowrap;
}

.data-table tbody th,
.data-table tbody td,
.field-table tbody th,
.field-table tbody td,
.impact-table tbody th,
.impact-table tbody td {
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
  word-break: break-word;
}

.data-table tbody th,
.field-table tbody th,
.impact-table tbody th {
  background: var(--stone);
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.data-table tbody tr:nth-child(even) td,
.field-table tbody tr:nth-child(even) td,
.impact-table tbody tr:nth-child(even) td {
  background: var(--paper);
}

.data-table tbody tr:hover td,
.field-table tbody tr:hover td,
.impact-table tbody tr:hover td {
  background: #faf6ea;
}

.data-table tbody a,
.field-table tbody a,
.impact-table tbody a {
  font-size: 13px;
  font-weight: 600;
}

/* 侧栏说明 */
.side-note,
.side-note.log-reading,
.report-note,
.equipment-note {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--ink);
  padding: 22px 22px 24px;
}

.side-note-title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.side-note-block {
  padding: 0 0 16px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--line-soft);
}

.side-note-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.side-note-block h3,
.note-block h3 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--cobalt);
}

.side-note-block p,
.note-block p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

/* FAQ 折叠 */
.faq-item {
  background: var(--white);
  border: 1px solid var(--line-soft);
  margin-bottom: 12px;
}

.faq-item:last-child {
  margin-bottom: 0;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 44px 14px 16px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  line-height: 1.5;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 400;
  color: var(--brick);
  line-height: 1;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--line-soft);
}

.faq-item p {
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

/* 下一步条 */
.next-step {
  margin-top: 48px;
  padding: 26px 26px 28px;
  background: var(--stone);
  border-left: 6px solid var(--brick);
}

.next-step h2 {
  font-size: 22px;
  margin: 0 0 16px;
}

.next-step p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 16px;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-links li {
  min-width: 0;
}

.next-link {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  min-height: 44px;
  padding: 10px 18px;
  background: var(--white);
  border: 2px solid var(--ink);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

.next-link:hover {
  background: var(--ink);
  color: var(--paper);
}

.next-label {
  font-weight: 700;
}

.next-desc {
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-soft);
}

.next-link:hover .next-desc {
  color: rgba(243, 239, 227, 0.78);
}

/* 相关内容条 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.related-links-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 14px;
  color: var(--cobalt);
  padding: 4px 10px;
  border: 1px solid var(--line-soft);
  background: var(--white);
  line-height: 1.5;
}

.related-links-item:hover {
  border-color: var(--brick);
  color: var(--brick);
}

/* 图片容器通用 */
figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* ------------------------------------------------------------
   pages · 首页
   ------------------------------------------------------------ */

/* 首屏 */
.hero-desk {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
  padding: 48px 0 40px;
  border-bottom: 4px solid var(--ink);
}

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

.hero-copy h1 {
  font-size: 44px;
  line-height: 1.28;
  margin: 0 0 20px;
  max-width: 560px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 26px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.hero-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 14px;
  border-left: 4px solid var(--mustard);
  background: var(--white);
  max-width: 520px;
}

.hero-cover {
  min-width: 0;
  border: 2px solid var(--ink);
  background: var(--white);
}

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

.hero-cover figcaption {
  padding: 10px 14px;
  margin: 0;
  font-size: 13px;
  border-top: 1px solid var(--line-soft);
  background: var(--white);
}

/* 当前资料周期 */
.cycle-status {
  padding: 32px 0;
  border-bottom: 1px solid var(--line-soft);
}

.cycle-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  padding: 14px 18px;
  background: var(--mustard);
  border: 2px solid var(--ink);
  margin-bottom: 22px;
}

.cycle-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.cycle-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
  min-width: 0;
}

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

.recent-item {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--cobalt);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.recent-channel {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cobalt);
}

.recent-title {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
}

.recent-code {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

/* 频道目录 */
.channel-grid {
  padding: 40px 0;
  border-bottom: 1px solid var(--line-soft);
}

.channel-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.channel-card {
  background: var(--white);
  border: 1px solid var(--line-soft);
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.channel-card:hover {
  border-color: var(--ink);
  background: #fbf8ee;
}

.channel-mark {
  display: inline-block;
  width: 34px;
  height: 6px;
  background: var(--cobalt);
}

.channel-card:nth-child(2) .channel-mark { background: var(--brick); }
.channel-card:nth-child(3) .channel-mark { background: var(--mustard); }
.channel-card:nth-child(4) .channel-mark { background: var(--ink); }
.channel-card:nth-child(5) .channel-mark { background: var(--cobalt); }
.channel-card:nth-child(6) .channel-mark { background: var(--brick); }

.channel-card h3 {
  font-size: 20px;
  margin: 0;
  line-height: 1.4;
}

.channel-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}

.channel-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--brick);
  align-self: flex-start;
  border-bottom: 1px solid var(--brick);
  padding-bottom: 1px;
}

.channel-card a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* 整理场次时间轴 */
.timeline {
  padding: 40px 0;
  border-bottom: 1px solid var(--line-soft);
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.timeline-date {
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--ink);
  padding-top: 2px;
  white-space: nowrap;
}

.timeline-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.status-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--ink);
  line-height: 1.5;
}

.status-active {
  background: var(--brick);
  border-color: var(--brick);
  color: var(--white);
}

.status-done {
  background: var(--white);
  color: var(--ink-soft);
  border-color: var(--line-soft);
}

.status-review {
  background: var(--mustard);
  border-color: var(--mustard);
  color: var(--ink);
}

.timeline-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
}

.timeline-body a {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
  border-bottom: 1px solid var(--cobalt);
  padding-bottom: 1px;
}

.timeline-body a:hover {
  border-bottom-color: var(--brick);
}

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

.collection-row {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 26px;
  align-items: stretch;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}

.collection-row:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.collection-cover {
  min-width: 0;
  border: 1px solid var(--line-soft);
  background: var(--white);
  overflow: hidden;
}

.collection-cover img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  height: auto;
}

.collection-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 0;
}

.collection-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  background: var(--cobalt);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.collection-body h3 {
  font-size: 20px;
  margin: 0;
  line-height: 1.4;
}

.collection-body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}

.collection-body a {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
  border-bottom: 1px solid var(--cobalt);
  padding-bottom: 1px;
}

/* 字段表 + 侧栏 */
.field-table-with-aside {
  padding: 40px 0;
  border-bottom: 1px solid var(--line-soft);
}

.field-table-with-aside .page-layout {
  padding-top: 0;
}

.table-panel {
  min-width: 0;
}

.table-panel .field-table {
  margin-top: 4px;
}

/* 入口核验摘要 */
.entry-summary {
  padding: 40px 0;
  border-bottom: 1px solid var(--line-soft);
}

.check-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.check-step {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--cobalt);
  padding: 18px 18px 20px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-num {
  display: inline-block;
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background: var(--mustard);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.check-step h3 {
  font-size: 17px;
  margin: 0;
  line-height: 1.4;
}

.check-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.section-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border: 2px solid var(--ink);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.section-more:hover {
  background: var(--ink);
  color: var(--paper);
}

/* 年度报告摘要 */
.annual-summary {
  padding: 40px 0;
}

.annual-entries {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.annual-entry {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--line-soft);
  padding: 18px 16px;
  color: var(--ink);
  min-width: 0;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.annual-entry:hover {
  border-color: var(--brick);
  background: #fbf8ee;
  color: var(--ink);
}

.annual-num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.annual-entry h3 {
  font-size: 16px;
  margin: 0;
  line-height: 1.4;
}

.annual-entry p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0;
}

/* ------------------------------------------------------------
   pages · 频道目录
   ------------------------------------------------------------ */

.channel-figure {
  margin-top: 24px;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.channel-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.channel-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.channel-definition-table,
.channel-topic-map {
  margin-bottom: 40px;
}

.channel-definition-table h2,
.channel-topic-map h2 {
  font-size: 26px;
  margin: 0 0 8px;
  padding-left: 14px;
  border-left: 5px solid var(--brick);
}

.table-scroll {
  margin-top: 18px;
  overflow-x: auto;
}

.table-scroll .data-table {
  min-width: 640px;
}

.table-footnote,
.table-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 16px 0 0;
  padding: 10px 14px;
  background: var(--stone);
  border-left: 4px solid var(--mustard);
}

.table-note a {
  font-weight: 600;
}

.mapping-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-top: 18px;
}

.mapping-row {
  display: grid;
  grid-template-columns: 130px 150px minmax(0, 1fr) 90px;
  gap: 16px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.mapping-channel {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.mapping-tag {
  display: inline-block;
  justify-self: start;
  padding: 2px 10px;
  background: var(--stone);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}

.mapping-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  min-width: 0;
}

.mapping-link {
  font-size: 14px;
  font-weight: 600;
  text-align: right;
}

.mapping-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 18px 0 0;
}

.mapping-note a {
  font-weight: 600;
}

/* ------------------------------------------------------------
   pages · 专题片单
   ------------------------------------------------------------ */

.collection-index,
.editorial-rules,
.tag-table {
  padding: 40px 0 0;
}

.collection-index h2,
.editorial-rules h2,
.tag-table h2 {
  font-size: 26px;
  margin: 0;
  padding-left: 14px;
  border-left: 5px solid var(--brick);
}

.collection-feature {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 28px;
  align-items: stretch;
  margin-top: 24px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}

.collection-feature:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.feature-media {
  min-width: 0;
  border: 1px solid var(--line-soft);
  background: var(--white);
  overflow: hidden;
}

.feature-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  height: auto;
}

.feature-media figcaption {
  padding: 8px 12px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.feature-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 4px 0;
}

.feature-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  background: var(--cobalt);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.feature-body h3 {
  font-size: 22px;
  margin: 0;
  line-height: 1.4;
}

.feature-body > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.feature-meta {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  padding: 6px 0;
  border-top: 1px dashed var(--line-soft);
  border-bottom: 1px dashed var(--line-soft);
}

.feature-link {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
  border-bottom: 1px solid var(--cobalt);
  padding-bottom: 1px;
}

.rule-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.rule-step {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--mustard);
  padding: 18px 18px 20px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rule-num {
  display: inline-block;
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.rule-step h3 {
  font-size: 17px;
  margin: 0;
  line-height: 1.4;
}

.rule-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.tag-table .data-table {
  margin-top: 22px;
}

/* ------------------------------------------------------------
   pages · 观看准备
   ------------------------------------------------------------ */

.prep-steps,
.reading-order,
.link-behavior,
.misread-faq {
  margin-bottom: 40px;
}

.prep-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.prep-step {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--cobalt);
  padding: 18px 18px 20px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-num {
  display: inline-block;
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background: var(--mustard);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.prep-step h3 {
  font-size: 17px;
  margin: 0;
  line-height: 1.4;
}

.prep-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.guide-figure {
  margin-top: 22px;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.guide-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.order-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 22px;
  border-top: 2px solid var(--ink);
}

.order-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.order-index {
  grid-row: 1 / span 2;
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: var(--stone);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.order-row h3 {
  font-size: 17px;
  margin: 0;
  line-height: 1.4;
  align-self: center;
}

.order-row p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
  min-width: 0;
}

.behavior-row {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--mustard);
  padding: 16px 18px;
  margin-top: 14px;
}

.behavior-row h3 {
  font-size: 17px;
  margin: 0 0 6px;
  line-height: 1.4;
}

.behavior-row p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.behavior-points {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.behavior-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--brick);
}

.misread-faq .faq-item {
  margin-top: 12px;
}

/* 设备清单侧栏 */
.equipment-note {
  position: sticky;
  top: 20px;
}

.equipment-note h2 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.aside-intro {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 16px;
}

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

.equip-list li {
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.equip-list h3 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  color: var(--cobalt);
  margin: 0 0 4px;
}

.equip-list p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

/* ------------------------------------------------------------
   pages · 入口核验
   ------------------------------------------------------------ */

.page-figure {
  margin-top: 24px;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.page-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.page-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.checklist {
  padding-top: 40px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-top: 20px;
}

.check-block {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.check-index {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--brick);
  font-weight: 700;
  margin: 0;
}

.check-block h3 {
  font-size: 19px;
  margin: 0;
  line-height: 1.4;
}

.check-block > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.check-points {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 4px 0;
  padding: 12px 16px;
  background: var(--white);
  border: 1px solid var(--line-soft);
}

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

.check-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--cobalt);
}

.check-standard {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.tag-note {
  display: inline-block;
  padding: 2px 8px;
  background: var(--mustard);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.link-behavior {
  padding-top: 40px;
}

.behavior-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.behavior-list .behavior-row {
  margin-top: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.exception-fields {
  padding-top: 40px;
}

.exception-fields .field-table {
  margin-top: 18px;
}

/* ------------------------------------------------------------
   pages · 收录更订
   ------------------------------------------------------------ */

.filter-bar {
  padding-bottom: 8px;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.filter-btn {
  min-height: 44px;
  padding: 8px 18px;
  background: var(--white);
  border: 1px solid var(--line-soft);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: 0;
}

.filter-btn:hover {
  border-color: var(--ink);
}

.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.log-timeline {
  padding-top: 32px;
}

.log-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-top: 20px;
}

.log-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.log-date {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--ink);
  line-height: 1.5;
}

.date-year {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
}

.date-day {
  display: block;
  font-size: 16px;
  font-weight: 700;
}

.log-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.log-type {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--ink);
  line-height: 1.5;
}

.type-add {
  background: var(--cobalt);
  border-color: var(--cobalt);
  color: var(--white);
}

.type-revise {
  background: var(--mustard);
  border-color: var(--mustard);
  color: var(--ink);
}

.type-remove {
  background: var(--brick);
  border-color: var(--brick);
  color: var(--white);
}

.type-merge {
  background: var(--white);
  border-color: var(--ink);
  color: var(--ink);
}

.log-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
}

.log-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.log-tags li {
  font-size: 12px;
  line-height: 1.5;
  padding: 2px 8px;
  background: var(--stone);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.log-link {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
  border-bottom: 1px solid var(--cobalt);
  padding-bottom: 1px;
}

.field-impact {
  padding-top: 40px;
}

.impact-figure {
  margin: 20px 0;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.impact-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.impact-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.log-reading {
  position: sticky;
  top: 20px;
}

/* ------------------------------------------------------------
   pages · 年度报告
   ------------------------------------------------------------ */

.report-cover {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 32px;
  align-items: stretch;
  padding: 40px 0;
  border-bottom: 1px solid var(--line-soft);
}

.cover-figure {
  min-width: 0;
  border: 2px solid var(--ink);
  background: var(--white);
  overflow: hidden;
}

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

.cover-figure figcaption {
  padding: 10px 14px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.cover-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.cover-copy h2 {
  font-size: 26px;
  margin: 0;
  line-height: 1.35;
}

.cover-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.overview,
.priorities,
.projects,
.data-notes,
.future {
  padding: 40px 0 0;
}

.overview h2,
.priorities h2,
.projects h2,
.data-notes h2,
.future h2 {
  font-size: 26px;
  margin: 0 0 20px;
  padding-left: 14px;
  border-left: 5px solid var(--brick);
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.overview-text {
  background: var(--white);
  border: 1px solid var(--line-soft);
  padding: 18px 18px 20px;
  min-width: 0;
}

.overview-text h3 {
  font-size: 17px;
  margin: 0 0 8px;
  line-height: 1.4;
}

.overview-text p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.priority-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.priority-item {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--cobalt);
  padding: 18px 18px 20px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.priority-item h3 {
  font-size: 18px;
  margin: 0;
  line-height: 1.4;
}

.priority-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.priority-result {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.field-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--stone);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
  white-space: nowrap;
}

.project-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.project-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.project-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
}

.project-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.project-row h3 {
  font-size: 18px;
  margin: 0;
  line-height: 1.4;
}

.project-row p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.data-note-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.data-note {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--mustard);
  padding: 16px 18px;
  min-width: 0;
}

.data-note h3 {
  font-size: 17px;
  margin: 0 0 6px;
  line-height: 1.4;
}

.data-note p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.report-note {
  margin-top: 32px;
}

.report-note h2 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.note-block {
  padding: 0 0 14px;
  margin-bottom: 14px;
  border-bottom: 1px dashed var(--line-soft);
}

.note-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.future-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.future-item {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--brick);
  padding: 18px 18px 20px;
  min-width: 0;
}

.future-item h3 {
  font-size: 17px;
  margin: 0 0 8px;
  line-height: 1.4;
}

.future-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

/* ------------------------------------------------------------
   pages · 边界与更正
   ------------------------------------------------------------ */

.boundary-section,
.correction-section,
.faq-section {
  padding-top: 40px;
}

.boundary-section h2,
.correction-section h2,
.faq-section h2 {
  font-size: 26px;
  margin: 0;
  padding-left: 14px;
  border-left: 5px solid var(--brick);
}

.boundary-figure {
  margin: 22px 0;
  border: 1px solid var(--line-soft);
  background: var(--white);
}

.boundary-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  height: auto;
}

.boundary-figure figcaption {
  padding: 10px 16px;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.boundary-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 14px;
  align-items: start;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--cobalt);
  padding: 16px 18px;
  min-width: 0;
}

.boundary-num {
  grid-row: 1 / span 2;
  display: inline-block;
  width: 34px;
  height: 34px;
  line-height: 34px;
  text-align: center;
  background: var(--mustard);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
}

.boundary-item h3 {
  font-size: 17px;
  margin: 0;
  line-height: 1.4;
  align-self: center;
}

.boundary-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
  min-width: 0;
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-top: 20px;
}

.scope-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scope-row h3 {
  font-size: 18px;
  margin: 0;
  line-height: 1.4;
}

.scope-row p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.scope-link {
  margin-top: 2px;
}

.scope-link a {
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--cobalt);
  padding-bottom: 1px;
}

.faq-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
  margin-top: 22px;
  align-items: start;
}

.faq-group .faq-item {
  margin-bottom: 14px;
}

/* ------------------------------------------------------------
   pages · 404
   ------------------------------------------------------------ */

.error-main {
  padding-top: 56px;
  padding-bottom: 40px;
}

.error-panel {
  background: var(--white);
  border: 2px solid var(--ink);
  border-top: 8px solid var(--brick);
  padding: 40px 32px 36px;
  max-width: 720px;
}

.error-panel .section-label {
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 40px;
  line-height: 1.3;
  margin: 0 0 16px;
}

.error-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 12px;
}

.error-panel > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0;
}

.error-actions .btn-primary {
  min-height: 46px;
}

.error-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 14px;
  border-left: 4px solid var(--mustard);
  background: var(--paper);
}

/* ------------------------------------------------------------
   responsive · 960px 断点
   ------------------------------------------------------------ */
@media (max-width: 960px) {
  :root {
    --gap-col: 28px;
  }

  .header-inner {
    padding: 0 20px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-nav:not([hidden]) {
    display: block;
  }

  .site-main,
  .breadcrumb {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-title {
    font-size: 32px;
  }

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

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

  .page-layout > .side-note,
  .page-layout > .equipment-note,
  .page-layout > .log-reading {
    position: static;
    top: auto;
  }

  .hero-desk {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 36px;
  }

  .hero-copy h1 {
    font-size: 34px;
  }

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

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

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

  .check-steps,
  .rule-list,
  .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .collection-row,
  .collection-feature,
  .report-cover {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .collection-cover img,
  .feature-media img,
  .cover-figure img {
    aspect-ratio: 16 / 9;
  }

  .mapping-row {
    grid-template-columns: 120px minmax(0, 1fr) 80px;
    grid-template-areas:
      "channel tag link"
      "desc desc desc";
    gap: 8px 14px;
  }

  .mapping-channel { grid-area: channel; }
  .mapping-tag { grid-area: tag; }
  .mapping-desc { grid-area: desc; }
  .mapping-link { grid-area: link; }

  .overview-grid,
  .priority-list,
  .future-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
    padding: 36px 20px 28px;
  }

  .footer-bottom p {
    padding: 16px 20px;
  }

  .boundary-list,
  .faq-group {
    grid-template-columns: minmax(0, 1fr);
  }

  .behavior-list,
  .data-note-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ------------------------------------------------------------
   responsive · 640px 断点
   ------------------------------------------------------------ */
@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .header-inner {
    padding: 0 16px;
    min-height: 64px;
  }

  .brand-mark {
    font-size: 19px;
  }

  .mobile-nav ul {
    padding: 6px 16px 12px;
  }

  .site-main,
  .breadcrumb {
    padding-left: 16px;
    padding-right: 16px;
  }

  .breadcrumb {
    padding-top: 14px;
    font-size: 13px;
  }

  .page-title {
    font-size: 28px;
  }

  .page-lead,
  .title-lead {
    font-size: 16px;
  }

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

  .hero-desk {
    padding-top: 28px;
    padding-bottom: 28px;
  }

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

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

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-outline {
    flex: 1 1 auto;
    min-width: 140px;
  }

  .cycle-bar {
    padding: 12px 14px;
  }

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

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

  .timeline-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 16px 0;
  }

  .timeline-date {
    padding-top: 0;
  }

  .check-steps,
  .rule-list,
  .prep-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .overview-grid,
  .priority-list,
  .future-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-head h2,
  .section-heading,
  .channel-definition-table h2,
  .channel-topic-map h2,
  .collection-index h2,
  .editorial-rules h2,
  .tag-table h2,
  .overview h2,
  .priorities h2,
  .projects h2,
  .data-notes h2,
  .future h2,
  .boundary-section h2,
  .correction-section h2,
  .faq-section h2,
  .cover-copy h2 {
    font-size: 22px;
  }

  .mapping-row {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "channel"
      "tag"
      "desc"
      "link";
    gap: 6px;
    padding: 14px 0;
  }

  .mapping-link {
    text-align: left;
  }

  .log-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 16px 0;
  }

  .log-date {
    display: flex;
    align-items: baseline;
    gap: 8px;
  }

  .date-year,
  .date-day {
    display: inline;
    font-size: 14px;
  }

  .boundary-item {
    grid-template-columns: 34px minmax(0, 1fr);
    padding: 14px 14px;
  }

  .order-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .order-index {
    width: 32px;
    height: 32px;
    line-height: 32px;
    font-size: 14px;
  }

  .next-step {
    padding: 20px 18px 22px;
    margin-top: 36px;
  }

  .next-links {
    flex-direction: column;
    align-items: stretch;
  }

  .next-link {
    width: 100%;
    justify-content: center;
  }

  .related-links {
    gap: 8px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom p {
    padding: 14px 16px;
    font-size: 12px;
  }

  .error-panel {
    padding: 28px 20px 26px;
  }

  .error-panel h1 {
    font-size: 28px;
  }

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

  .data-table,
  .field-table,
  .impact-table {
    font-size: 13px;
  }

  .data-table thead th,
  .field-table thead th,
  .impact-table thead th {
    padding: 9px 10px;
    font-size: 12px;
    white-space: normal;
  }

  .data-table tbody th,
  .data-table tbody td,
  .field-table tbody th,
  .field-table tbody td,
  .impact-table tbody th,
  .impact-table tbody td {
    padding: 9px 10px;
  }

  .table-scroll .data-table {
    min-width: 560px;
  }

  .faq-item summary {
    padding: 12px 40px 12px 14px;
    font-size: 15px;
  }

  .faq-item p {
    padding: 12px 14px;
    font-size: 14px;
  }
}

/* ------------------------------------------------------------
   动效增强（不阻塞初始可见性）
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

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