/* ==========================================================
   吃瓜爆料网 · 全站样式表
   版本：1.0
   说明：本样式表覆盖全站所有页面，遵循 DOM 契约，
   按 base / layout / components / pages / responsive 分组。
   ========================================================== */

/* ==========================================================
   1. Base —— 基础变量、重置、全局字体与颜色
   ========================================================== */
:root {
  --color-bg: #F7F8FA;
  --color-text: #1A1A2E;
  --color-link: #4A90D9;
  --color-card-bg: #E8ECF1;
  --color-white: #FFFFFF;
  --color-border: #D9DEE6;
  --color-muted: #6A7280;
  --color-dark: #1A1A2E;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --font-size-h1: 32px;
  --font-size-h2: 24px;
  --font-size-h3: 20px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --font-size-xs: 13px;

  --line-height-body: 1.6;
  --line-height-heading: 1.3;

  --container-width: 1200px;
  --container-padding: 24px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  --breakpoint-mobile: 768px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #357ABD;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: 12px;
}

/* 通用容器 */
.site-header .header-inner,
.page-layout,
.layout-shell,
.site-footer .footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ==========================================================
   2. Layout —— 整体布局骨架
   ========================================================== */

/* 内页布局容器 */
.page-layout,
.layout-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  grid-template-areas: "main sidebar";
  gap: 32px;
  align-items: start;
  padding-top: 32px;
  padding-bottom: 48px;
}

.site-inner .page-layout,
.site-inner .layout-shell {
  /* 与 body 布局保持一致 */
}

/* 主内容区 */
.site-main {
  min-width: 0;
  grid-area: main;
}

/* 内页主内容 */
.inner-main {
  min-width: 0;
  min-height: 400px;
}

/* 侧栏 */
.sidebar {
  grid-area: sidebar;
  min-width: 0;
}

/* 侧栏在 DOM 中位于 main 之后，使用 grid-area 保证顺序正确 */

/* 首页主内容 */
.home-main {
  min-width: 0;
}

/* 404 页 */
.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================
   3. Components —— 公共组件
   ========================================================== */

/* 3.1 页头 */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
}

.brand {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.brand a {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.brand a:hover {
  color: var(--color-link);
}

/* 导航 */
.site-nav {
  flex: 1;
  display: flex;
  justify-content: space-between;
}

.site-nav:first-of-type {
  justify-content: flex-start;
}

.site-nav:last-of-type {
  justify-content: flex-end;
}

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-list li a:hover {
  color: var(--color-link);
  background-color: rgba(74, 144, 217, 0.08);
}

.nav-list li a.is-current {
  color: var(--color-link);
  font-weight: 600;
  background-color: rgba(74, 144, 217, 0.1);
}

/* 汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 3;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 3.2 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: var(--font-size-small);
  color: var(--color-muted);
  margin-bottom: 16px;
}

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

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

.breadcrumb-sep {
  color: #B0B7C3;
}

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

/* 3.3 页面标题区 */
.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

/* 3.4 区块标题 */
.section-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: var(--color-link);
  border-radius: 2px;
}

/* 3.5 侧栏 */
.sidebar-card,
.sidebar-widget,
.sidebar-block,
.sidebar-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar-title,
.sidebar-widget h3,
.sidebar-block h2,
.sidebar-section h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-links li a {
  display: block;
  padding: 8px 10px;
  font-size: var(--font-size-small);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-links li a:hover {
  color: var(--color-link);
  background-color: rgba(74, 144, 217, 0.06);
}

/* 3.6 相关内容链接 */
.related-links {
  margin-top: 40px;
  padding: 20px;
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
}

.related-links h2,
.related-links h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-links p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  margin-bottom: 8px;
}

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.related-links ul li a {
  font-size: var(--font-size-small);
  color: var(--color-link);
}

.related-links ul li a:hover {
  text-decoration: underline;
}

/* 3.7 页脚 */
.site-footer {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 24px;
  margin-top: 48px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

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

.footer-brand a {
  color: var(--color-text);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
}

.footer-nav a {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  padding: 4px 0;
}

.footer-nav a:hover {
  color: var(--color-link);
}

.copyright {
  font-size: var(--font-size-xs);
  color: #9AA3AF;
  margin-top: 8px;
}

/* 3.8 图片通用约束 */
figure {
  margin: 0;
}

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

/* ==========================================================
   4. Pages —— 各页面专属样式
   ========================================================== */

/* ========== 4.1 首页 ========== */

/* 时间归档首屏 */
.time-archive {
  padding: 40px 0 32px;
}

.archive-caption {
  margin-bottom: 28px;
}

.archive-caption h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  margin-bottom: 12px;
}

.archive-intro {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 640px;
  line-height: 1.7;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.archive-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.archive-item:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
  transform: translateY(-2px);
}

.archive-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.archive-item h3 a {
  color: var(--color-text);
}

.archive-item h3 a:hover {
  color: var(--color-link);
}

.archive-item p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.archive-link {
  font-size: var(--font-size-small);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.archive-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.archive-link:hover::after {
  transform: translateX(3px);
}

.archive-jump {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.archive-jump a {
  display: inline-block;
  padding: 8px 16px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.archive-jump a:hover {
  background-color: var(--color-link);
  color: var(--color-white);
}

/* 焦点报道 */
.focus-report {
  padding: 32px 0;
}

.focus-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-dark);
}

.focus-card img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}

.focus-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 32px 28px 24px;
  background: linear-gradient(to top, rgba(26, 26, 46, 0.92), rgba(26, 26, 46, 0.55), transparent);
  color: var(--color-white);
}

.focus-card figcaption h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.focus-card figcaption h3 a {
  color: var(--color-white);
}

.focus-card figcaption h3 a:hover {
  color: #B8D4F0;
}

.focus-card figcaption p {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
  margin-bottom: 12px;
  max-width: 560px;
}

.focus-link {
  display: inline-block;
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-link);
  padding: 8px 18px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.focus-link:hover {
  background-color: #357ABD;
  color: var(--color-white);
}

/* 频道分类导航带 */
.channel-strip {
  padding: 32px 0;
}

.channel-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.channel-tab {
  display: inline-block;
  padding: 10px 20px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: all var(--transition-fast);
}

.channel-tab:hover {
  color: var(--color-link);
  border-color: var(--color-link);
  background-color: rgba(74, 144, 217, 0.05);
}

/* 最新资讯列表 */
.latest-news {
  padding: 32px 0;
}

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

.news-item {
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.news-item:first-child {
  padding-top: 0;
}

.news-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.news-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.news-item h3 a {
  color: var(--color-text);
}

.news-item h3 a:hover {
  color: var(--color-link);
}

.news-meta {
  font-size: var(--font-size-xs);
  color: #9AA3AF;
  margin-bottom: 6px;
}

.news-item > p:last-child {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 专题策划入口 */
.topic-entrance {
  padding: 32px 0;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.topic-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.topic-card:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
}

.topic-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-card h3 {
  font-size: 18px;
  font-weight: 600;
  padding: 16px 20px 4px;
}

.topic-card h3 a {
  color: var(--color-text);
}

.topic-card h3 a:hover {
  color: var(--color-link);
}

.topic-card p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  padding: 0 20px 20px;
  margin-bottom: 0;
}

/* 编辑推荐 */
.editor-picks {
  padding: 32px 0;
}

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

.pick-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-fast);
}

.pick-item:hover {
  box-shadow: 0 2px 12px rgba(26, 26, 46, 0.06);
}

.pick-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  flex-shrink: 0;
  min-width: 220px;
}

.pick-item h3 a {
  color: var(--color-text);
}

.pick-item h3 a:hover {
  color: var(--color-link);
}

.pick-item p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 信息来源与反馈 */
.source-feedback {
  padding: 32px 0;
}

.source-body {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.source-body p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.source-body p:last-child {
  margin-bottom: 0;
}

/* ========== 4.2 频道分类页 ========== */

/* 频道列表 */
.channel-list-section {
  margin-bottom: 40px;
}

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

.channel-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.channel-card:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
}

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

.channel-card-body {
  padding: 18px 20px;
}

.channel-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.channel-desc {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}

.channel-represent {
  font-size: var(--font-size-xs);
  color: #9AA3AF;
  line-height: 1.5;
}

/* 频道代表文章 */
.channel-articles-section {
  margin-bottom: 40px;
}

.article-highlights {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.highlight-item {
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.highlight-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.highlight-title a {
  color: var(--color-text);
}

.highlight-title a:hover {
  color: var(--color-link);
}

.highlight-meta {
  font-size: var(--font-size-xs);
  color: #9AA3AF;
  margin-bottom: 6px;
}

.highlight-excerpt {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 频道页相关推荐 */
.related-links p {
  margin-bottom: 12px;
}

/* ========== 4.3 内容专题页 ========== */

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

.topics-section .section-title,
.topics-summary-section .section-title {
  margin-bottom: 8px;
}

.section-desc {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.topics-section .topic-card {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  padding: 20px;
}

.topics-section .topic-card img {
  width: 280px;
  height: 180px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
}

.topic-card-body {
  flex: 1;
  min-width: 0;
}

.topic-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
  padding: 0;
}

.topic-card-body h3 a {
  color: var(--color-text);
}

.topic-card-body h3 a:hover {
  color: var(--color-link);
}

.topic-meta {
  font-size: var(--font-size-xs);
  color: #9AA3AF;
  margin-bottom: 8px;
}

.topic-card-body > p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
  padding: 0;
}

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

.topic-points li {
  font-size: var(--font-size-small);
  color: var(--color-text);
  line-height: 1.5;
  padding-left: 16px;
  position: relative;
}

.topic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background-color: var(--color-link);
  border-radius: 50%;
}

/* 专题摘要 */
.topics-summary-section {
  margin-bottom: 40px;
}

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

.summary-item {
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.summary-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.summary-item p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 专题页相关链接 */
.topics-section .related-links {
  margin-top: 32px;
}

/* ========== 4.4 事件时间线页 ========== */

.timeline-index {
  margin-bottom: 40px;
}

.timeline-index .content-media {
  margin: 20px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.content-media-inline img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.content-media-inline figcaption {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  padding: 10px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.timeline-index > p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.year-jump-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.year-jump-list a {
  display: inline-block;
  padding: 8px 16px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.year-jump-list a:hover {
  color: var(--color-link);
  border-color: var(--color-link);
}

/* 时间线节点 */
.timeline-nodes {
  margin-bottom: 40px;
}

.timeline-year-block {
  margin-bottom: 28px;
  padding-left: 20px;
  border-left: 2px solid var(--color-link);
}

.timeline-year-block h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-link);
}

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

.node-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  position: relative;
}

.node-item time {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-link);
  margin-bottom: 4px;
}

.node-item p {
  font-size: var(--font-size-small);
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 6px;
}

.node-item a {
  font-size: var(--font-size-xs);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.node-item a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.node-item a:hover::after {
  transform: translateX(3px);
}

/* 相关阅读 */
.related-reading {
  margin-top: 32px;
  padding: 20px;
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
}

.related-reading h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-reading ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.related-reading ul li a {
  display: block;
  padding: 6px 0;
  font-size: var(--font-size-small);
  color: var(--color-text);
}

.related-reading ul li a:hover {
  color: var(--color-link);
}

/* ========== 4.5 人物资料页 ========== */

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

.people-section > p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.person-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 20px;
  text-align: center;
  transition: box-shadow var(--transition-fast);
}

.person-card:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
}

.person-figure {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--color-card-bg);
}

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

.person-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.person-tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-link);
  background-color: rgba(74, 144, 217, 0.1);
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
}

.person-card > p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.person-card > a {
  font-size: var(--font-size-small);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.person-card > a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.person-card > a:hover::after {
  transform: translateX(3px);
}

/* 人物简介 */
.people-intro-section {
  margin-bottom: 40px;
}

.people-intro-section > p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.intro-item {
  padding: 18px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.intro-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.intro-item p {
  font-size: var(--font-size-small);
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ========== 4.6 404 页 ========== */

.error-section {
  text-align: center;
  padding: 80px 24px;
  max-width: 600px;
  margin: 0 auto;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-link);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.error-action {
  margin-top: 8px;
}

.error-btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--color-white);
  background-color: var(--color-link);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.error-btn:hover {
  background-color: #357ABD;
  color: var(--color-white);
}

/* ==========================================================
   5. Responsive —— 响应式规则
   ========================================================== */

/* 平板与桌面小屏 */
@media (max-width: 1024px) {
  .page-layout,
  .layout-shell {
    grid-template-columns: 1fr 280px;
    gap: 24px;
  }

  .focus-card img {
    height: 360px;
  }

  .pick-item {
    flex-direction: column;
    gap: 6px;
  }

  .pick-item h3 {
    min-width: 0;
  }

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

/* 移动端断点 */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }

  /* 页头 */
  .header-inner {
    height: 60px;
  }

  .brand {
    position: static;
    transform: none;
    margin-right: auto;
  }

  .brand a {
    font-size: 18px;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  /* 导航收起 */
  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(26, 26, 46, 0.08);
    padding: 12px 16px;
    display: none;
    z-index: 99;
  }

  .site-nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list li a {
    padding: 12px 16px;
    font-size: 16px;
  }

  /* 内页布局改单列 */
  .page-layout,
  .layout-shell {
    grid-template-columns: 1fr;
    grid-template-areas: "main" "sidebar";
    gap: 24px;
    padding-top: 20px;
  }

  .sidebar {
    grid-area: sidebar;
  }

  /* 首页 */
  .archive-grid {
    grid-template-columns: 1fr;
  }

  .focus-card img {
    height: 240px;
  }

  .focus-card figcaption {
    padding: 20px 16px 16px;
  }

  .focus-card figcaption h3 {
    font-size: 20px;
  }

  .channel-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .channel-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }

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

  .topic-card img {
    height: 180px;
  }

  /* 频道页 */
  .channel-grid {
    grid-template-columns: 1fr;
  }

  /* 专题页 */
  .topics-section .topic-card {
    flex-direction: column;
    padding: 0;
  }

  .topics-section .topic-card img {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .topic-card-body {
    padding: 16px;
  }

  /* 时间线页 */
  .content-media-inline img {
    height: 200px;
  }

  .timeline-year-block {
    padding-left: 14px;
  }

  /* 人物资料页 */
  .people-grid {
    grid-template-columns: 1fr;
  }

  /* 编辑推荐 */
  .pick-item {
    flex-direction: column;
    gap: 4px;
  }

  /* 页脚 */
  .footer-inner {
    gap: 12px;
  }

  .footer-nav {
    gap: 8px 16px;
  }

  /* 面包屑 */
  .breadcrumb {
    font-size: 13px;
  }

  /* 页面标题 */
  .page-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
  }

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

  /* 区块标题 */
  .section-title {
    font-size: 20px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }
}

/* 超小屏 */
@media (max-width: 400px) {
  .archive-jump {
    flex-direction: column;
    align-items: stretch;
  }

  .archive-jump a {
    text-align: center;
  }

  .year-jump-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .year-jump-list a {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .related-links ul {
    flex-direction: column;
    gap: 4px;
  }
}