/* ============================================================
   base — 站点基础变量与重置
   ============================================================ */
:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-primary: #0e7490;
  --color-primary-dark: #155e75;
  --color-accent: #d97706;
  --color-border: #e2e8f0;
  --color-surface-alt: #eef2f7;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --container-width: 1120px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --header-height: 64px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  line-height: 1.35;
  font-weight: 600;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 17px;
}

/* ============================================================
   layout — 全站统一容器与骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0;
}

.brand-tag {
  font-size: 12px;
  color: var(--color-text-secondary);
  border-left: 1px solid var(--color-border);
  padding-left: 8px;
  line-height: 1.4;
}

.site-nav {
  margin-left: auto;
}

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

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.nav-list a:hover {
  color: var(--color-primary);
  background: var(--color-surface-alt);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-surface-alt);
}

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

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 内页统一容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 56px;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px 0 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

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

.breadcrumb-sep {
  color: #94a3b8;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  padding: 8px 0 28px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 720px;
  line-height: 1.7;
}

/* 页脚 */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}

.footer-brand .footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-nav h3,
.footer-help h3,
.footer-boundary h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.footer-nav ul,
.footer-help ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a,
.footer-help a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-nav a:hover,
.footer-help a:hover {
  color: var(--color-primary);
}

.footer-boundary p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.6;
}

/* ============================================================
   components — 通用组件
   ============================================================ */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  line-height: 1.5;
  min-height: 44px;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-text {
  background: transparent;
  padding: 8px 0;
  color: var(--color-primary);
  font-weight: 500;
}

.btn-text:hover {
  color: var(--color-primary-dark);
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  min-height: 44px;
}

.btn-home:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

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

.section-heading h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.section-note {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

/* 公告条 */
.notice-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px 24px;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.notice-bar.is-hidden {
  display: none;
}

.notice-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
}

.notice-close {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
}

.notice-close:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* 图片容器 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-top: 8px;
}

/* 折叠问答 */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  line-height: 1.5;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  line-height: 1;
}

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

.faq-item > p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.faq-item > p a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 500;
}

/* 相关支持入口条 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 0;
  margin: 32px 0 8px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: 4px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 6px 12px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.related-links-item:hover {
  background: var(--color-border);
  text-decoration: none;
}

/* 底部支持入口（页脚上方） */
.footer-support {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.support-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.support-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.support-link {
  font-size: 14px;
  color: var(--color-primary);
  padding: 8px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  line-height: 1.5;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.support-link:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

/* 通用两栏布局（侧栏在右） */
.layout-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* 侧栏在左 */
.layout-shell.sidebar-left {
  grid-template-columns: 260px 1fr;
  align-items: start;
}

/* ============================================================
   pages — 首页
   ============================================================ */
.home-main {
  width: 100%;
}

/* 时间线首屏 */
.hero-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 48px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.hero-intro {
  padding-top: 8px;
}

.hero-intro h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.hero-tagline {
  font-size: 17px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.6;
}

.hero-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
  max-width: 560px;
}

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

.hero-updates {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.hero-updates .section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-item time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  line-height: 1.5;
  padding-top: 2px;
}

.timeline-item a {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.5;
}

.timeline-item a:hover {
  color: var(--color-primary);
}

.hero-media {
  margin-top: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* 首页主内容图 */
.content-media-primary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 8px;
}

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

.content-media-primary figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding-top: 8px;
}

/* 题材地图与内容速览 */
.topic-map {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.topic-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.topic-nav {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.topic-nav h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.topic-nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.topic-nav a:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary);
  text-decoration: none;
}

.topic-tip {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  line-height: 1.6;
}

.topic-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.content-preview-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: border-color 0.15s ease;
}

.preview-item:hover {
  border-color: var(--color-primary);
}

.preview-item .tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-surface-alt);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  line-height: 1.5;
}

.preview-item a {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.5;
}

.preview-item a:hover {
  color: var(--color-primary);
}

.preview-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 专题片单摘要 */
.special-teaser {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.special-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.special-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.15s ease;
}

.special-card:hover {
  border-color: var(--color-primary);
}

.special-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.special-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.special-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

/* 观看指南预览 */
.guide-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.step-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.guide-preview .btn-text {
  margin-top: 4px;
}

/* 入口核验提示 */
.entry-tip {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.entry-tip h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.entry-tip p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* FAQ 摘要 */
.faq-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

/* ============================================================
   pages — 频道总览 catalog
   ============================================================ */
.catalog-filter {
  margin-bottom: 32px;
}

.filter-wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.filter-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.topic-select {
  font-family: inherit;
  font-size: 14px;
  padding: 8px 36px 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  min-height: 40px;
  cursor: pointer;
}

.topic-select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

.filter-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-left: auto;
}

.catalog-directory {
  margin-bottom: 40px;
}

.catalog-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.sidebar-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.catalog-figure {
  margin-top: 16px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.catalog-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.catalog-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.channel-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.group-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.channel-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.channel-item {
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
}

.channel-name {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 4px;
}

.channel-desc {
  display: block;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 4px;
}

.channel-audience {
  display: block;
  font-size: 13px;
  color: var(--color-primary);
  line-height: 1.6;
}

/* 相关栏目卡片 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: border-color 0.15s ease;
}

.related-card:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

.related-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.related-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   pages — 内容档案 archives
   ============================================================ */
.archive-content {
  min-width: 0;
}

.year-index {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.year-index h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.year-index ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.year-index a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.year-index a:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary);
  text-decoration: none;
}

.year-index a.is-current-year {
  background: var(--color-primary);
  color: #fff;
  font-weight: 500;
}

.index-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.archive-group {
  margin-bottom: 40px;
}

.archive-group > h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 10px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--color-primary);
}

.month-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.month-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.month-head h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.entry-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-surface-alt);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

.media-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 12px;
}

.media-wrap img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.topic-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.audience-tag {
  font-size: 13px;
  color: var(--color-primary);
  line-height: 1.6;
}

.history-jump {
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 24px;
}

.history-jump h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.history-jump p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.history-jump a {
  display: inline-block;
  margin-right: 16px;
  margin-top: 8px;
  font-weight: 500;
}

/* 档案页相关链接 */
.archives-related-links p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.archives-related-links a {
  display: inline-block;
  margin-right: 16px;
  font-weight: 500;
}

/* ============================================================
   pages — 专题片单 special
   ============================================================ */
.special-list {
  margin-bottom: 40px;
}

.special-list > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.special-list .special-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 20px;
  padding: 0;
  overflow: hidden;
}

.special-media {
  border-radius: 0;
  overflow: hidden;
  height: 100%;
}

.special-media img {
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
}

.special-body {
  padding: 20px 24px 20px 0;
}

.special-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.special-topic {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.special-audience {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.special-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.editorial-note {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}

.editorial-note h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.editorial-note p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 8px;
}

.audience-tips {
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.audience-tips h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.audience-tips p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.audience-tips ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 12px;
}

.audience-tips li {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 4px;
}

.audience-tips a {
  font-weight: 500;
}

.related-channels {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}

.related-channels h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.related-channels p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.related-channels .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  border: none;
  padding: 0;
  margin: 0;
}

.related-channels .related-links li a {
  display: inline-block;
  padding: 8px 16px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-primary);
  min-height: 40px;
  line-height: 1.5;
}

.related-channels .related-links li a:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ============================================================
   pages — 观看指南 guide
   ============================================================ */
.guide-layout {
  grid-template-columns: 1fr 300px;
  align-items: start;
}

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

.guide-steps {
  margin-bottom: 40px;
}

.guide-steps > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.guide-steps .steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guide-steps .step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-surface-alt);
  border-radius: 50%;
  line-height: 1;
}

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

.step-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.entry-type-table {
  margin-bottom: 40px;
}

.entry-type-table > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.entry-table,
.entry-compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.entry-table th,
.entry-table td,
.entry-compare-table th,
.entry-compare-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.6;
  vertical-align: top;
}

.entry-table thead th,
.entry-compare-table thead th {
  background: var(--color-surface-alt);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.entry-table tbody tr:last-child td,
.entry-compare-table tbody tr:last-child td {
  border-bottom: none;
}

.guide-figure {
  margin-top: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.guide-aside {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.guide-aside h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.notice-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}

.notice-list li h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.notice-list li p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.aside-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 8px 0;
}

/* ============================================================
   pages — 入口核验 entry
   ============================================================ */
.content-block {
  margin-bottom: 40px;
}

.content-block > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.content-block > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.entry-table-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 16px;
}

.entry-table-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.verify-steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.verify-steps-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.verify-steps-list h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.verify-steps-list p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.risk-tip-block {
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 24px;
}

.risk-tip-block h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.risk-tip-block p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ============================================================
   pages — 常见问题 faq
   ============================================================ */
.faq-category-anchors {
  margin-bottom: 40px;
}

.faq-category-anchors > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.content-media-inline {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
}

.content-media-inline img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.anchor-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.anchor-item {
  display: block;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  line-height: 1.5;
  min-height: 44px;
}

.anchor-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.faq-list {
  margin-bottom: 40px;
}

.faq-list > h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
}

.faq-group {
  margin-bottom: 28px;
}

.faq-group-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.faq-related-links {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.faq-related-links > h2 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.related-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.related-link-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.related-link {
  display: block;
  padding: 12px 16px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.5;
  min-height: 44px;
}

.related-link:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ============================================================
   pages — 404
   ============================================================ */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}

.error-panel {
  margin-bottom: 48px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-links {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 560px;
  margin: 0 auto;
}

.error-links h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.error-links ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.error-links a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--color-primary);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.error-links a:hover {
  background: var(--color-border);
  text-decoration: none;
}

/* ============================================================
   responsive — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

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

@media (max-width: 900px) {
  .hero-timeline {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .topic-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
  }

  .year-index {
    position: static;
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-aside {
    position: static;
  }

  .special-list .special-card {
    grid-template-columns: 1fr;
  }

  .special-media img {
    min-height: 0;
    height: 180px;
  }

  .special-body {
    padding: 20px 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 2px;
  }

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

  .nav-list a {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: var(--radius-sm);
  }

  .inner-main {
    padding: 0 16px 40px;
  }

  .hero-timeline {
    padding: 32px 16px 40px;
  }

  .topic-map,
  .special-teaser,
  .guide-preview,
  .faq-summary {
    padding: 28px 16px;
  }

  .entry-tip {
    margin: 0 16px;
    padding: 20px;
  }

  .content-media-primary {
    padding: 0 16px;
  }

  .hero-media img,
  .content-media-primary img {
    height: 160px;
  }

  .special-grid {
    grid-template-columns: 1fr;
  }

  .steps-list {
    grid-template-columns: 1fr;
  }

  .channel-list {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .anchor-list {
    grid-template-columns: 1fr;
  }

  .related-link-list {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

  .footer-support .support-inner {
    padding: 16px;
    gap: 12px;
  }

  .notice-bar {
    padding: 10px 48px 10px 16px;
    justify-content: flex-start;
  }

  .notice-text {
    text-align: left;
    font-size: 13px;
  }

  .notice-close {
    right: 8px;
  }

  .page-header {
    padding: 8px 0 20px;
    margin-bottom: 24px;
  }

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

  .filter-wrap {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
  }

  .filter-note {
    margin-left: 0;
  }

  .month-block {
    padding: 16px;
  }

  .month-head {
    flex-wrap: wrap;
  }

  .table-wrap {
    margin: 0 -16px;
    border-left: none;
    border-right: none;
    border-radius: 0;
  }

  .entry-table th,
  .entry-table td,
  .entry-compare-table th,
  .entry-compare-table td {
    padding: 12px 14px;
    font-size: 13px;
  }

  .error-main {
    padding: 48px 16px;
  }

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

@media (max-width: 480px) {
  .brand-tag {
    display: none;
  }

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

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

  .timeline-item {
    flex-direction: column;
    gap: 4px;
  }

  .timeline-item time {
    font-size: 12px;
  }

  .preview-item {
    padding: 14px 16px;
  }

  .special-card {
    padding: 20px;
  }

  .step-item {
    padding: 16px;
  }

  .channel-item {
    padding: 10px;
  }

  .guide-steps .step-item,
  .verify-steps-list li {
    flex-direction: column;
    gap: 10px;
  }

  .step-number {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  .entry-table th,
  .entry-table td,
  .entry-compare-table th,
  .entry-compare-table td {
    padding: 10px 12px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .support-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}