/* ==========================================================================
   秋霞在线视频 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --paper: #FBF9F5;
  --ink: #1F1D1A;
  --brick: #8C3A2B;
  --pine: #3F6B52;
  --rule: #E4DED2;
  --muted: #6B655C;
  --paper-soft: #F4F0E8;
  --radius: 6px;
  --shell: 1120px;
  --read: 720px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;
}

*,
*::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(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

p {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  color: #6E2A1E;
  text-decoration: underline;
}

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

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

time {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

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

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

.site-header {
  position: relative;
  z-index: 20;
  background-color: var(--paper);
  border-bottom: 1px solid var(--rule);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
}

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

.brand-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  border: 2px solid var(--brick);
  border-radius: 3px;
  background-color: var(--paper-soft);
  box-shadow: inset 0 0 0 4px var(--paper);
  flex: 0 0 auto;
}

.brand-text {
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}

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

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

.nav-item {
  display: block;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  color: var(--ink);
  font-size: 0.9375rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--brick);
  border-bottom-color: var(--rule);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink);
  content: "";
}

.nav-toggle-bar {
  position: relative;
}

.nav-toggle-bar::before {
  position: absolute;
  top: -6px;
  left: 0;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 6px;
  left: 0;
}

.site-main {
  display: block;
  background-color: var(--paper);
}

.home-main {
  padding-bottom: 8px;
}

.inner-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 24px 24px 64px;
}

/* 面包屑 */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 0.875rem;
  color: var(--muted);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--brick);
  text-decoration: none;
}

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

.breadcrumb-current {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

/* 页面标题区 */

.page-header {
  max-width: var(--read);
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}

.page-title {
  font-size: 32px;
  line-height: 1.35;
  letter-spacing: 0;
}

.page-description {
  margin-top: 12px;
  max-width: 46em;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* 页脚 */

.site-footer {
  background-color: var(--paper-soft);
  border-top: 1px solid var(--rule);
  color: var(--ink);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr) 1.4fr;
  gap: 32px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 44px 24px 32px;
}

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

.footer-name {
  font-size: 1.0625rem;
  font-weight: 600;
}

.footer-slogan {
  margin-top: 6px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.footer-about {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-title {
  margin-bottom: 12px;
  font-size: 0.9375rem;
  font-weight: 600;
}

.footer-list li + li {
  margin-top: 8px;
}

.footer-list a {
  color: var(--muted);
  font-size: 0.875rem;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--brick);
  text-decoration: none;
}

.footer-note {
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px 26px;
  border-top: 1px solid var(--rule);
}

.footer-copy {
  color: var(--muted);
  font-size: 0.8125rem;
}

.footer-deep {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
}

.footer-deep a {
  color: var(--muted);
}

.footer-deep a:hover,
.footer-deep a:focus-visible {
  color: var(--brick);
  text-decoration: none;
}

.footer-sep {
  color: var(--rule);
}

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

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
}

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

.btn-primary {
  background-color: var(--brick);
  border-color: var(--brick);
  color: #FBF9F5;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #6E2A1E;
  border-color: #6E2A1E;
  color: #FBF9F5;
}

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

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

/* 区块标题组 */

.section-head {
  max-width: var(--read);
  margin-bottom: 22px;
}

.section-title {
  font-size: 22px;
  line-height: 1.4;
}

.section-desc,
.section-lead,
.section-intro {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.section-lead a,
.section-intro a {
  color: var(--brick);
}

/* 更多链接 */

.more-link,
.text-link {
  display: inline-block;
  color: var(--brick);
  font-size: 0.9375rem;
  font-weight: 600;
}

.more-link:hover,
.more-link:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  color: #6E2A1E;
  text-decoration: underline;
}

.section-foot {
  margin-top: 20px;
}

/* 图片容器 */

.hero-figure img,
.collection-figure img,
.collection-media img,
.channel-figure img,
.guide-figure img,
.record-figure img,
.media-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.hero-caption,
.collection-figure figcaption,
.channel-figure figcaption,
.guide-figure figcaption,
.record-figure figcaption,
.media-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* 记录条目（首页 / 频道页 / 时间线共用结构，作用域限定） */

.record-date {
  display: inline-block;
  min-width: 88px;
  margin-right: 12px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

.record-target {
  display: inline-block;
  margin-right: 10px;
  color: var(--pine);
  font-size: 0.875rem;
  font-weight: 600;
}

.record-text {
  color: var(--muted);
  font-size: 0.875rem;
}

/* 筛选栏 */

.filter-bar {
  padding: 16px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.filter-title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.filter-group + .filter-group {
  margin-top: 14px;
}

.filter-group-title {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

.filter-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.filter-options,
.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip,
.filter-option {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  background-color: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 0.8125rem;
}

.filter-chip:hover,
.filter-chip:focus-visible,
.filter-option:hover,
.filter-option:focus-visible {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

.filter-hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.8125rem;
}

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

.site-notice {
  padding: 9px 24px;
  background-color: var(--ink);
  color: #EDE8DE;
  font-size: 0.8125rem;
  text-align: center;
}

/* 首屏 */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 44px;
  align-items: center;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 44px;
}

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

.hero-kicker {
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-title {
  margin-top: 12px;
  font-size: 34px;
  line-height: 1.32;
}

.hero-desc {
  margin-top: 16px;
  max-width: 34em;
  color: var(--muted);
  font-size: 1rem;
}

.hero-lines {
  margin-top: 22px;
  border-top: 1px solid var(--rule);
}

.hero-line {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
}

.line-label {
  flex: 0 0 96px;
  color: var(--pine);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

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

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

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

/* 首页通用区块 */

.home-section {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px;
  border-top: 1px solid var(--rule);
}

/* 频道总览表（首页） */

.channel-table {
  border-top: 1px solid var(--rule);
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr) minmax(0, 1.6fr) 96px;
  gap: 16px;
  align-items: center;
  padding: 14px 4px;
  border-bottom: 1px solid var(--rule);
}

.channel-row-head {
  padding: 10px 4px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.channel-cell {
  min-width: 0;
  font-size: 0.9375rem;
}

.cell-name {
  font-weight: 600;
}

.cell-topic {
  color: var(--brick);
}

.cell-order {
  color: var(--muted);
  font-size: 0.875rem;
}

.cell-entry {
  text-align: right;
}

.entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 600;
}

.entry-link:hover,
.entry-link:focus-visible {
  border-color: var(--brick);
  background-color: var(--paper-soft);
  text-decoration: none;
}

/* 专题片单入口（首页） */

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

.collection-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 16px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

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

.collection-figure {
  margin-bottom: 14px;
}

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

.collection-name {
  font-size: 1.0625rem;
}

.collection-desc {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.collection-range {
  margin-top: 10px;
  color: var(--pine);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.card-link {
  margin-top: 14px;
  align-self: flex-start;
  font-size: 0.875rem;
  font-weight: 600;
}

/* 整理记录速览（首页） */

.record-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

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

.record-month {
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--pine);
}

.record-list {
  display: block;
}

.record-item {
  padding: 8px 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.875rem;
}

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

/* 观看指引与收录边界摘要（首页） */

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

.brief-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.brief-title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  font-size: 1rem;
}

.brief-prepare .brief-title {
  color: var(--brick);
}

.brief-boundary .brief-title {
  color: var(--pine);
}

.brief-list {
  display: block;
}

.brief-item {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  color: var(--muted);
}

.brief-item + .brief-item {
  margin-top: 10px;
}

.brief-item::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 1px;
  background-color: var(--brick);
  content: "";
}

.brief-boundary .brief-item::before {
  background-color: var(--pine);
}

.brief-foot {
  margin-top: 16px;
}

/* 站内页面索引（首页） */

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

.index-col {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.index-col:hover {
  border-color: var(--brick);
}

.index-name {
  font-size: 1rem;
}

.index-desc {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.875rem;
}

.index-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 内页通用布局
   -------------------------------------------------------------------------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

.content-main,
.page-content,
.layout-main,
.guide-main {
  min-width: 0;
}

.sidebar,
.page-aside,
.guide-aside,
.layout-aside {
  min-width: 0;
}

/* 侧栏主题树 */

.sidebar-title,
.aside-title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
}

.sidebar-note,
.aside-text {
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.topic-tree {
  margin-top: 14px;
}

.topic-group + .topic-group {
  margin-top: 16px;
}

.topic-group-name {
  display: block;
  margin-bottom: 8px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.topic-items li + li {
  margin-top: 6px;
}

.topic-items a,
.topic-tree-link {
  display: inline-block;
  min-height: 30px;
  color: var(--ink);
  font-size: 0.875rem;
}

.topic-items a:hover,
.topic-items a:focus-visible,
.topic-tree-link:hover,
.topic-tree-link:focus-visible {
  color: var(--brick);
  text-decoration: none;
}

.topic-tree-item + .topic-tree-item {
  margin-top: 6px;
}

.sidebar-more {
  margin-top: 16px;
}

/* 侧栏卡片 */

.aside-block + .aside-block {
  margin-top: 22px;
}

.aside-card {
  padding: 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.aside-card + .aside-card {
  margin-top: 18px;
}

.aside-card-note {
  background-color: var(--paper);
}

.aside-steps li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.875rem;
}

.aside-steps li + li {
  margin-top: 10px;
}

.aside-steps li::before {
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 8px;
  height: 1px;
  background-color: var(--pine);
  content: "";
}

.aside-list li {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 0.875rem;
}

.aside-list li + li {
  margin-top: 9px;
}

.aside-list li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 1px;
  background-color: var(--brick);
  content: "";
}

.aside-note,
.aside-links {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.8125rem;
}

.aside-links a {
  display: inline-block;
  margin-top: 6px;
}

/* 内页 CTA（频道页） */

.inner-cta {
  margin-top: 48px;
  padding: 28px 24px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.inner-cta-text {
  margin-top: 10px;
  max-width: 52em;
  color: var(--muted);
  font-size: 0.9375rem;
}

.inner-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* --------------------------------------------------------------------------
   pages · 频道分类
   -------------------------------------------------------------------------- */

.channel-table-section,
.channel-notes-section,
.channel-topic-section,
.channel-records-section {
  margin-top: 40px;
}

.channel-table-section {
  margin-top: 32px;
}

table.channel-table {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

table.channel-table th,
table.channel-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
  font-size: 0.9375rem;
}

table.channel-table thead th {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

table.channel-table tbody th {
  font-weight: 600;
}

table.channel-table tbody td {
  color: var(--muted);
}

table.channel-table tbody tr:hover {
  background-color: var(--paper-soft);
}

.channel-figure {
  margin: 18px 0 24px;
}

.channel-figure img {
  aspect-ratio: 16 / 7;
}

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

.channel-note {
  min-width: 0;
  padding: 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.channel-note-name {
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 1rem;
}

.channel-note p {
  color: var(--muted);
  font-size: 0.9375rem;
}

.channel-topic-list {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

.channel-topic-item {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 32px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 13px 4px;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
}

.channel-topic-name {
  font-weight: 600;
}

.channel-topic-arrow {
  color: var(--rule);
  font-family: var(--font-mono);
  text-align: center;
}

.channel-topic-target {
  color: var(--pine);
  font-size: 0.875rem;
}

.channel-topic-more,
.channel-record-more {
  margin-top: 16px;
}

.channel-record-list {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

.channel-record-item {
  padding: 12px 4px;
  border-bottom: 1px solid var(--rule);
}

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

.section + .section {
  margin-top: 44px;
}

.collection-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 22px;
}

.collection-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 16px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.collection-item:hover {
  border-color: var(--pine);
}

.collection-media {
  margin-bottom: 14px;
}

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

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

.collection-topic {
  color: var(--pine);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.collection-body .collection-name {
  margin-top: 8px;
  font-size: 1.0625rem;
}

.collection-meta {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.875rem;
}

.collection-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* 专题与频道对应关系 */

.mapping-table {
  margin-top: 20px;
  border-top: 1px solid var(--rule);
}

.mapping-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 16px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
}

.mapping-head {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.mapping-cell {
  min-width: 0;
}

.mapping-row:not(.mapping-head) .mapping-cell:last-child {
  color: var(--pine);
}

/* 重点专题展开 */

.featured-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.featured-item + .featured-item {
  margin-top: 20px;
}

.featured-name {
  font-size: 1.0625rem;
}

.featured-desc {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.featured-entries {
  margin-top: 16px;
  border-top: 1px solid var(--rule);
}

.featured-entry {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.9375rem;
}

.entry-index {
  flex: 0 0 34px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.entry-title {
  flex: 1 1 200px;
  min-width: 0;
}

.entry-channel {
  color: var(--pine);
  font-size: 0.8125rem;
}

/* 专题页整理记录摘要 */

.section-records-brief .brief-list {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

.section-records-brief .brief-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 11px 4px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
}

.section-records-brief .brief-item + .brief-item {
  margin-top: 0;
}

.section-records-brief .brief-item::before {
  display: none;
}

.brief-date {
  flex: 0 0 92px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.brief-target {
  flex: 0 0 auto;
  color: var(--pine);
  font-size: 0.875rem;
  font-weight: 600;
}

.brief-note {
  flex: 1 1 220px;
  min-width: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.brief-more {
  margin-top: 16px;
}

/* 相关入口 */

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.related-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
}

.related-link:hover,
.related-link:focus-visible {
  border-color: var(--brick);
  background-color: var(--paper-soft);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 观看指引
   -------------------------------------------------------------------------- */

.page-guide .page-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.guide-figure {
  margin-bottom: 28px;
}

.guide-figure img {
  aspect-ratio: 16 / 8;
}

.guide-section + .guide-section {
  margin-top: 40px;
}

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

.prepare-item {
  position: relative;
  padding: 11px 4px 11px 22px;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

.prepare-item::before {
  position: absolute;
  top: 1.35em;
  left: 4px;
  width: 8px;
  height: 1px;
  background-color: var(--brick);
  content: "";
}

.check-steps {
  margin-top: 18px;
  counter-reset: guide-step;
}

.check-step {
  position: relative;
  padding: 0 0 18px 52px;
  border-left: 1px solid var(--rule);
  margin-left: 16px;
}

.check-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.check-step .step-index {
  position: absolute;
  top: 0;
  left: -16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 50%;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.step-title {
  font-size: 1rem;
}

.step-body {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* 字段表 */

.field-table {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

.field-caption {
  padding-bottom: 10px;
  color: var(--muted);
  font-size: 0.8125rem;
  text-align: left;
}

.field-table th,
.field-table td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
  font-size: 0.9375rem;
}

.field-table thead th {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.field-table tbody th {
  width: 30%;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
}

.field-table tbody td {
  color: var(--muted);
}

/* FAQ */

.faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
}

.faq-item {
  border-bottom: 1px solid var(--rule);
}

.faq-question {
  position: relative;
  padding: 14px 34px 14px 4px;
  cursor: pointer;
  font-size: 0.9375rem;
  font-weight: 600;
  list-style: none;
}

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

.faq-question::after {
  position: absolute;
  top: 50%;
  right: 8px;
  width: 10px;
  height: 10px;
  margin-top: -6px;
  border-right: 1px solid var(--brick);
  border-bottom: 1px solid var(--brick);
  transform: rotate(45deg);
  content: "";
  transition: transform 0.18s ease;
}

.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
}

.faq-question:hover {
  color: var(--brick);
}

.faq-answer {
  padding: 0 34px 16px 4px;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* 收录边界 */

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

.boundary-item {
  position: relative;
  padding: 11px 4px 11px 22px;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

.boundary-item::before {
  position: absolute;
  top: 1.35em;
  left: 4px;
  width: 8px;
  height: 1px;
  background-color: var(--pine);
  content: "";
}

/* --------------------------------------------------------------------------
   pages · 整理记录
   -------------------------------------------------------------------------- */

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

.type-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.type-name {
  font-size: 1rem;
}

.type-desc {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.record-timeline {
  margin-top: 44px;
}

.record-figure {
  margin: 18px 0 26px;
}

.record-figure img {
  aspect-ratio: 16 / 7;
}

.page-records .record-month {
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--pine);
}

.page-records .record-month + .record-month {
  margin-top: 32px;
}

.page-records .record-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}

.record-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.record-tag {
  display: inline-block;
  padding: 1px 8px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 3px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.page-records .record-target {
  margin: 8px 0 0;
  font-size: 0.9375rem;
}

.page-records .record-text {
  margin-top: 4px;
}

.record-links {
  margin-top: 44px;
}

.link-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.link-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.link-column-title {
  font-size: 1rem;
}

.link-column-text {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.link-action {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.875rem;
  font-weight: 600;
}

.record-footnote {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   pages · 问题反馈
   -------------------------------------------------------------------------- */

.page-feedback .page-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.feedback-types,
.feedback-info,
.feedback-flow,
.feedback-link {
  min-width: 0;
}

.feedback-types + .feedback-info,
.feedback-info + .feedback-flow,
.feedback-flow + .feedback-link {
  margin-top: 40px;
}

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

.type-card {
  min-width: 0;
  padding: 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.type-card .type-desc {
  margin-top: 8px;
}

.type-example {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--rule);
  color: var(--brick);
  font-size: 0.8125rem;
}

.media-figure {
  margin: 20px 0 22px;
}

.media-figure img {
  aspect-ratio: 16 / 7;
}

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

.info-item {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--brick);
  border-radius: 6px;
}

.info-name {
  font-size: 0.9375rem;
}

.info-desc {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.875rem;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.flow-step {
  min-width: 0;
  padding: 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.flow-step .step-index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.step-name {
  font-size: 1rem;
}

.step-desc {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.875rem;
}

.section-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.section-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 14px;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52vh;
  padding: 56px 24px;
}

.error-panel {
  width: 100%;
  max-width: 640px;
  padding: 36px 32px;
  background-color: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 8px;
}

.error-code {
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

.error-title {
  margin-top: 10px;
  font-size: 28px;
  line-height: 1.35;
}

.error-desc {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.9375rem;
}

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

.error-hint {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 40px 24px 36px;
  }

  .hero-figure {
    order: 2;
  }

  .footer-inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

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

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

  .page-layout.sidebar-left .sidebar,
  .page-aside,
  .guide-aside,
  .layout-aside {
    order: 2;
  }

  .collection-list,
  .channel-note-list,
  .info-list,
  .link-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 12px 16px;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    padding: 8px 16px 16px;
    background-color: var(--paper);
    border-bottom: 1px solid var(--rule);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

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

  .nav-link {
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 0 4px;
    border-bottom: 1px solid var(--rule);
  }

  .nav-link.is-current {
    border-bottom-color: var(--brick);
  }

  .inner-main {
    padding: 20px 16px 48px;
  }

  .home-section {
    padding: 32px 16px;
  }

  .hero {
    padding: 32px 16px 28px;
  }

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

  .page-title {
    font-size: 24px;
  }

  .error-title {
    font-size: 24px;
  }

  .page-header {
    margin-bottom: 22px;
  }

  .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 2px;
  }

  .channel-row-head {
    display: none;
  }

  .cell-entry {
    text-align: left;
    margin-top: 6px;
  }

  .collection-grid,
  .record-groups,
  .brief-columns,
  .channel-note-list,
  .collection-list,
  .type-list,
  .type-grid,
  .info-list,
  .link-columns,
  .flow-steps,
  .index-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .channel-topic-arrow {
    display: none;
  }

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

  .mapping-head {
    display: none;
  }

  table.channel-table thead,
  .field-table thead {
    display: none;
  }

  table.channel-table tbody tr,
  .field-table tbody tr {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }

  table.channel-table tbody th,
  table.channel-table tbody td,
  .field-table tbody th,
  .field-table tbody td {
    display: block;
    width: auto;
    padding: 3px 0;
    border-bottom: 0;
  }

  .check-step {
    padding-left: 44px;
    margin-left: 14px;
  }

  .check-step .step-index {
    left: -14px;
    width: 28px;
    height: 28px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 34px 16px 24px;
  }

  .footer-bottom {
    padding: 16px 16px 22px;
  }

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

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .site-notice {
    padding: 8px 16px;
    font-size: 0.75rem;
  }

  .hero-title {
    font-size: 24px;
  }

  .section-title {
    font-size: 20px;
  }

  .hero-actions,
  .inner-cta-actions,
  .error-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn,
  .inner-cta-actions .btn,
  .error-actions .btn {
    width: 100%;
  }

  .hero-line {
    flex-wrap: wrap;
    gap: 4px;
  }

  .line-label {
    flex: 1 1 100%;
  }

  .record-date,
  .brief-date {
    flex: 1 1 100%;
    min-width: 0;
    margin-right: 0;
  }

  .channel-topic-list,
  .channel-record-item,
  .record-item {
    font-size: 0.875rem;
  }
}