/* ==========================================================================
   飘花影视 · 全站样式
   视觉方向：纪录片频道风，纸感底色 + 衬线标题 + 细分割线秩序
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 基础与变量
   -------------------------------------------------------------------------- */
:root {
  --paper: #f4f2ee;
  --ink: #1f2429;
  --ink-soft: #5b6672;
  --brown: #8a7f6d;
  --teal: #2f6b63;
  --teal-dark: #245651;
  --line: #d8d3ca;
  --line-soft: #e6e2da;
  --surface: #fbfaf8;
  --surface-alt: #eeebe5;

  --serif: Georgia, "Songti SC", "Times New Roman", serif;
  --sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --container: 1120px;
  --measure: 720px;
  --radius: 6px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0;
}

ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

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

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

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

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

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

/* --------------------------------------------------------------------------
   layout · 骨架：容器、页头、导航、主区、页脚
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
  color: var(--ink);
}

.brand:hover {
  text-decoration: none;
  color: var(--ink);
}

.brand-name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.brand-tagline {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: var(--radius);
  text-decoration: none;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
  background-color: var(--surface-alt);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--teal);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--teal);
}

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

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

.site-main {
  display: block;
  min-height: 60vh;
}

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

.site-footer {
  margin-top: 64px;
  padding: 40px 0 32px;
  background-color: var(--surface-alt);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px 48px;
  align-items: start;
}

.footer-brand {
  max-width: 480px;
}

.footer-name {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
}

.footer-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-nav-list a {
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-nav-list a:hover,
.footer-nav-list a:focus-visible {
  color: var(--teal);
}

.footer-copy {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-soft);
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--teal);
  border-color: var(--teal);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--teal-dark);
  border-color: var(--teal-dark);
  color: #ffffff;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--ink-soft);
  color: var(--ink);
  background-color: var(--surface);
}

/* 区块通用 */
.section {
  padding: 56px 0;
}

.section + .section {
  border-top: 1px solid var(--line-soft);
}

.section-head {
  margin-bottom: 28px;
}

.section-title,
.section-head .section-title {
  font-size: 26px;
  color: var(--ink);
}

.section-desc,
.section-intro,
.section-lead,
.section-lede {
  margin-top: 10px;
  max-width: var(--measure);
  font-size: 15px;
  color: var(--ink-soft);
}

.section-foot {
  margin-top: 22px;
  font-size: 15px;
}

/* 表格 */
.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.data-table,
.channel-table,
.status-table,
.map-table,
.field-spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background-color: var(--surface);
  border: 1px solid var(--line);
}

.data-table caption,
.channel-table caption,
.status-table caption,
.map-table caption,
.field-spec-table caption {
  padding: 10px 14px;
  text-align: left;
  font-size: 13px;
  color: var(--ink-soft);
  background-color: var(--surface-alt);
  border-bottom: 1px solid var(--line);
}

.data-table th,
.data-table td,
.channel-table th,
.channel-table td,
.status-table th,
.status-table td,
.map-table th,
.map-table td,
.field-spec-table th,
.field-spec-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}

.data-table thead th,
.channel-table thead th,
.status-table thead th,
.map-table thead th,
.field-spec-table thead th {
  background-color: var(--surface-alt);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td,
.channel-table tbody tr:last-child th,
.channel-table tbody tr:last-child td,
.status-table tbody tr:last-child td,
.map-table tbody tr:last-child td,
.field-spec-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover,
.channel-table tbody tr:hover,
.status-table tbody tr:hover,
.map-table tbody tr:hover,
.field-spec-table tbody tr:hover {
  background-color: var(--surface-alt);
}

.channel-table tbody th {
  font-weight: 600;
  color: var(--ink);
}

.field-spec-table .field-name {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
  white-space: nowrap;
}

/* 折叠问答 */
.faq-list {
  display: grid;
  gap: 10px;
  max-width: 860px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--surface);
}

.faq-question {
  position: relative;
  padding: 14px 44px 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--teal);
}

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

.faq-answer {
  padding: 0 16px 16px;
  max-width: var(--measure);
  font-size: 15px;
  color: var(--ink-soft);
}

/* 相关栏目指引 */
.related-nav,
.section-related {
  padding: 48px 0;
  border-top: 1px solid var(--line-soft);
}

.related-nav-list,
.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.related-nav-item a,
.related-link {
  display: block;
  padding: 16px 18px;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.related-nav-item a:hover,
.related-nav-item a:focus-visible,
.related-link:hover,
.related-link:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  text-decoration: none;
}

.related-item {
  display: flex;
  flex-direction: column;
}

.related-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* 面包屑与内页标题区 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 24px 0 40px;
}

.page-header-inner,
.page-header-text {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.page-header-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 40px;
  align-items: center;
}

.page-title {
  font-size: 40px;
  font-weight: 600;
  color: var(--ink);
}

.page-lead,
.page-lede,
.page-subtitle {
  margin-top: 14px;
  max-width: var(--measure);
  font-size: 16px;
  color: var(--ink-soft);
}

.page-header-figure,
.page-header-media {
  margin: 0;
}

.page-header-figure img,
.page-header-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-header-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main {
  padding-bottom: 8px;
}

.fact-bar {
  padding: 14px 0;
  background-color: var(--surface-alt);
  border-bottom: 1px solid var(--line);
}

.fact-bar-inner {
  display: flex;
  align-items: center;
}

.fact-text {
  font-size: 14px;
  color: var(--ink-soft);
}

.fact-text strong {
  color: var(--ink);
  font-weight: 600;
}

/* 首屏 */
.hero-section {
  padding: 48px 0 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 48px;
  align-items: center;
}

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

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--brown);
  text-transform: uppercase;
}

.hero-title {
  margin-top: 14px;
  font-size: 40px;
  font-weight: 600;
  color: var(--ink);
}

.hero-lead {
  margin-top: 18px;
  max-width: 520px;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-media {
  margin: 0;
  min-width: 0;
}

.hero-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.hero-caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.hero-index {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-index-title {
  font-size: 14px;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.hero-index-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.hero-index-item a {
  display: block;
  padding: 12px 14px;
  font-size: 15px;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.hero-index-item a:hover,
.hero-index-item a:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  text-decoration: none;
}

/* 频道方向总览 */
.channel-table .cell-code {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--brown);
  white-space: nowrap;
}

.channel-table .cell-name {
  font-weight: 600;
  color: var(--ink);
}

/* 专题片单入口 */
.collection-list {
  display: grid;
  gap: 20px;
}

.collection-row {
  display: grid;
  grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.collection-row:hover {
  background-color: var(--surface-alt);
  border-color: var(--line);
}

.collection-media {
  margin: 0;
}

.collection-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
}

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

.collection-name {
  font-size: 20px;
  color: var(--ink);
}

.collection-theme {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.collection-order,
.collection-meta {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* 观看四步 */
.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: home-step;
}

.step-item {
  position: relative;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
}

.step-item .step-name {
  font-size: 19px;
  color: var(--ink);
}

.step-item .step-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.step-item .step-check {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--brown);
}

/* 收录边界与整理记录摘要 */
.notes-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
}

.notes-col-title {
  font-size: 19px;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.field-list {
  margin-top: 16px;
}

.field-list dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
}

.field-list dd {
  margin: 4px 0 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.log-list {
  margin-top: 16px;
  display: grid;
  gap: 16px;
}

.log-item {
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.log-phase {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
}

.log-text {
  margin-top: 4px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* 站内栏目索引 */
.sitemap-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.sitemap-item {
  padding: 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sitemap-name {
  font-size: 17px;
}

.sitemap-name a {
  color: var(--ink);
}

.sitemap-name a:hover,
.sitemap-name a:focus-visible {
  color: var(--teal);
}

.sitemap-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 频道分类
   -------------------------------------------------------------------------- */
.page-channels .channels-overview,
.page-channels .channel-feature,
.page-channels .channel-compact,
.page-channels .channel-mapping,
.page-channels .related-nav {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-channels .channels-overview {
  border-top: 0;
}

.page-channels .channels-overview h2,
.page-channels .channel-feature h2,
.page-channels .channel-compact h2,
.page-channels .channel-mapping h2,
.page-channels .related-nav h2 {
  font-size: 26px;
}

.page-channels .channel-table {
  margin-top: 22px;
}

.page-channels .channel-table tbody th {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
  white-space: nowrap;
}

.page-channels .section-note {
  margin-top: 18px;
  font-size: 15px;
}

.channel-feature-row {
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
}

.channel-feature-row:first-of-type {
  border-top: 0;
}

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

.channel-figure {
  margin: 0;
}

.channel-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.channel-name {
  font-size: 22px;
  color: var(--ink);
}

.channel-desc {
  margin-top: 12px;
  max-width: var(--measure);
  font-size: 15px;
  color: var(--ink-soft);
}

.channel-fields {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px 24px;
}

.channel-fields dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
}

.channel-fields dd {
  margin-top: 2px;
  font-size: 15px;
  color: var(--ink);
}

.channel-more {
  margin-top: 18px;
  font-size: 15px;
}

.channel-compact-list {
  margin-top: 22px;
  display: grid;
  gap: 14px;
}

.channel-compact-item {
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
}

.channel-compact-name {
  font-size: 17px;
}

.channel-compact-name a {
  color: var(--ink);
}

.channel-compact-name a:hover,
.channel-compact-name a:focus-visible {
  color: var(--teal);
}

.channel-compact-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.mapping-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 22px;
}

.mapping-column-title {
  font-size: 19px;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.mapping-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.mapping-item {
  font-size: 15px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 专题片单
   -------------------------------------------------------------------------- */
.page-collections .collection-intro,
.page-collections .collection-items,
.page-collections .collection-adjacent,
.page-collections .collection-map,
.page-collections .related-nav {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-collections .collection-intro {
  border-top: 0;
}

.page-collections .collection-intro h2,
.page-collections .collection-items h2,
.page-collections .collection-adjacent h2,
.page-collections .collection-map h2,
.page-collections .related-nav h2 {
  font-size: 26px;
}

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

.intro-block {
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.intro-block-title {
  font-size: 18px;
  color: var(--ink);
}

.intro-block p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.entry-list {
  margin-top: 24px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.entry-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.18s ease;
}

.entry-row:hover {
  background-color: var(--surface-alt);
}

.entry-index {
  font-family: var(--serif);
  font-size: 20px;
  color: var(--brown);
  text-align: center;
}

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

.entry-name {
  font-size: 18px;
  color: var(--ink);
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.entry-field {
  position: relative;
  padding-left: 12px;
}

.entry-field::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  background-color: var(--line);
  border-radius: 50%;
}

.entry-link {
  padding: 10px 18px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--teal);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
}

.entry-link:hover,
.entry-link:focus-visible {
  border-color: var(--teal);
  color: var(--teal-dark);
  text-decoration: none;
}

.collection-tip {
  margin-top: 20px;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--ink-soft);
  background-color: var(--surface-alt);
  border-left: 3px solid var(--brown);
  border-radius: var(--radius);
}

.adjacent-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.adjacent-col {
  padding: 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.adjacent-title {
  font-size: 18px;
  color: var(--ink);
}

.adjacent-name {
  margin-top: 10px;
  font-size: 15px;
  color: var(--teal);
}

.adjacent-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.map-table {
  margin-top: 24px;
}

/* --------------------------------------------------------------------------
   pages · 观看指南
   -------------------------------------------------------------------------- */
.page-guide .guide-steps,
.page-guide .status-overview,
.page-guide .trouble-list,
.page-guide .guide-faq,
.page-guide .related-nav {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-guide .guide-steps {
  border-top: 0;
}

.page-guide .guide-steps h2,
.page-guide .status-overview h2,
.page-guide .trouble-list h2,
.page-guide .guide-faq h2,
.page-guide .related-nav h2 {
  font-size: 26px;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.step-card {
  padding: 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
}

.step-card .step-index {
  display: inline-block;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--brown);
  letter-spacing: 0.08em;
}

.step-card .step-name {
  margin-top: 6px;
  font-size: 19px;
  color: var(--ink);
}

.step-card .step-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.step-card .step-check,
.step-card .step-pitfall {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-soft);
}

.step-label {
  display: inline-block;
  margin-right: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--brown);
}

.status-table {
  margin-top: 24px;
}

.trouble-items {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}

.trouble-item {
  padding: 20px 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brown);
  border-radius: var(--radius);
}

.trouble-name {
  font-size: 18px;
  color: var(--ink);
}

.trouble-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 28px;
  margin-top: 14px;
}

.trouble-fields dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
}

.trouble-fields dd {
  margin-top: 2px;
  font-size: 15px;
  color: var(--ink-soft);
}

.page-guide .faq-list {
  margin-top: 24px;
}

/* --------------------------------------------------------------------------
   pages · 整理记录
   -------------------------------------------------------------------------- */
.page-notes .section {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-notes .section-field-spec {
  border-top: 0;
}

.page-notes .section-title {
  font-size: 26px;
}

.field-spec-table {
  margin-top: 22px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 24px;
}

.boundary-group {
  padding: 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-group-title {
  font-size: 18px;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.boundary-list {
  margin-top: 14px;
  padding-left: 20px;
  list-style: decimal;
  display: grid;
  gap: 8px;
}

.boundary-list li {
  font-size: 15px;
  color: var(--ink-soft);
}

.notes-groups {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.notes-group {
  padding: 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.notes-group-title {
  font-size: 18px;
  color: var(--ink);
}

.notes-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.notes-list li {
  padding-left: 16px;
  position: relative;
  font-size: 15px;
  color: var(--ink-soft);
}

.notes-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 1px;
  background-color: var(--brown);
}

.page-notes .faq-list {
  margin-top: 24px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.site-error .error-main {
  padding: 64px 0;
}

.error-panel {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.error-code {
  font-family: var(--serif);
  font-size: 64px;
  line-height: 1;
  color: var(--line);
}

.error-title {
  margin-top: 12px;
  font-size: 40px;
  color: var(--ink);
}

.error-text {
  margin-top: 14px;
  max-width: var(--measure);
  font-size: 16px;
  color: var(--ink-soft);
}

.error-text + .error-text {
  margin-top: 8px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.error-links {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 0;
  border-top: 1px solid var(--line-soft);
}

.error-links .section-title {
  font-size: 26px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.error-link-list a {
  display: block;
  padding: 16px 18px;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.error-link-list a:hover,
.error-link-list a:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 12px 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: relative;
  }

  .nav-list {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-width: 200px;
    padding: 8px;
    background-color: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    display: none;
  }

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

  .nav-link {
    display: block;
    padding: 12px 14px;
  }

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--teal);
  }

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

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

  .hero-title {
    font-size: 30px;
  }

  .hero-media img {
    height: 300px;
  }

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

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

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

  .notes-columns,
  .mapping-columns,
  .collection-intro-body,
  .adjacent-grid,
  .boundary-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

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

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

  .page-header-figure img,
  .page-header-media img {
    height: 220px;
  }

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

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

  .entry-link {
    grid-column: 2;
    justify-self: start;
  }

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

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .container,
  .breadcrumb,
  .page-header-inner,
  .page-header-text,
  .error-panel,
  .error-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    padding: 10px 16px;
  }

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

  .brand-tagline {
    display: none;
  }

  .section {
    padding: 40px 0;
  }

  .section-title,
  .section-head .section-title,
  .page-channels .channels-overview h2,
  .page-channels .channel-feature h2,
  .page-channels .channel-compact h2,
  .page-channels .channel-mapping h2,
  .page-channels .related-nav h2,
  .page-collections .collection-intro h2,
  .page-collections .collection-items h2,
  .page-collections .collection-adjacent h2,
  .page-collections .collection-map h2,
  .page-collections .related-nav h2,
  .page-guide .guide-steps h2,
  .page-guide .status-overview h2,
  .page-guide .trouble-list h2,
  .page-guide .guide-faq h2,
  .page-guide .related-nav h2,
  .page-notes .section-title,
  .error-links .section-title {
    font-size: 21px;
  }

  .hero-section {
    padding-top: 32px;
  }

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

  .hero-media img {
    height: 220px;
  }

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

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

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

  .page-header {
    padding: 18px 0 28px;
  }

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

  .page-header-figure img,
  .page-header-media img {
    height: 180px;
  }

  .collection-row {
    padding: 16px;
  }

  .collection-media img {
    height: 170px;
  }

  .channel-figure img {
    height: 190px;
  }

  .page-channels .channels-overview,
  .page-channels .channel-feature,
  .page-channels .channel-compact,
  .page-channels .channel-mapping,
  .page-channels .related-nav,
  .page-collections .collection-intro,
  .page-collections .collection-items,
  .page-collections .collection-adjacent,
  .page-collections .collection-map,
  .page-collections .related-nav,
  .page-guide .guide-steps,
  .page-guide .status-overview,
  .page-guide .trouble-list,
  .page-guide .guide-faq,
  .page-guide .related-nav,
  .page-notes .section {
    padding: 36px 16px;
  }

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

  .entry-index {
    text-align: left;
  }

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

  .data-table th,
  .data-table td,
  .channel-table th,
  .channel-table td,
  .status-table th,
  .status-table td,
  .map-table th,
  .map-table td,
  .field-spec-table th,
  .field-spec-table td {
    padding: 12px;
  }

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

  .error-title {
    font-size: 26px;
  }
}

/* 动效增强：仅在允许动效时对首屏以下模块做轻微上移淡入 */
@media (prefers-reduced-motion: no-preference) {
  .section-channels .section-head,
  .section-collections .section-head,
  .section-steps .section-head {
    animation: rise-in 0.5s ease-out both;
  }
}

@keyframes rise-in {
  from {
    transform: translateY(10px);
    opacity: 0.001;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}