/* ==========================================================================
   黑料官网 · 全站样式表
   视觉方向：双色信息风（深蓝主色 / 橙色辅色 / 白底黑字）
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base —— 基础变量、重置、字体与通用元素
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #122a44;
  --color-primary-light: #2a4f78;
  --color-accent: #e67e22;
  --color-accent-dark: #c96a17;
  --color-bg: #ffffff;
  --color-bg-light: #f5f7fa;
  --color-text: #333333;
  --color-text-light: #6b7a8c;
  --color-border: #e3e8ee;
  --color-white: #ffffff;

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

  --container-width: 1200px;
  --main-content-width: 720px;
  --sidebar-width: 300px;

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

  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   2. Layout —— 全站布局骨架：页头、页脚、主容器、面包屑、页面标题
   -------------------------------------------------------------------------- */

/* ---- 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 {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo:hover {
  color: var(--color-accent);
}

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

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

.nav-list li a {
  display: block;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  border-bottom: 2px solid transparent;
}

.nav-list li a:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-light);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-size: 18px;
  line-height: 1;
  color: var(--color-primary);
  cursor: pointer;
}

.nav-toggle:hover {
  background-color: var(--color-bg-light);
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-brand {
  margin-bottom: 32px;
  max-width: 420px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-col ul li a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
}

/* ---- 页面主区 ---- */
.site-main {
  flex: 1;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
  width: 100%;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

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

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

/* ---- 页面标题区 ---- */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

/* ---- 内页双栏布局（主内容在前，侧栏在后） ---- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
  gap: 40px;
  align-items: start;
}

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

.sidebar {
  min-width: 0;
}

/* ---- 通用区块标题 ---- */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   3. Components —— 通用组件：卡片、列表、侧栏、时间线、反馈
   -------------------------------------------------------------------------- */

/* ---- 侧栏卡片 ---- */
.sidebar-card {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card:last-child {
  margin-bottom: 0;
}

.sidebar-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
}

.sidebar-links li {
  margin-bottom: 10px;
}

.sidebar-links li a {
  font-size: 14px;
  color: var(--color-primary);
  display: inline-block;
  padding: 2px 0;
}

.sidebar-links li a:hover {
  color: var(--color-accent);
}

/* ---- 侧栏块（timeline 页） ---- */
.sidebar-block {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-block:last-child {
  margin-bottom: 0;
}

.sidebar-block .sidebar-title {
  font-size: 16px;
  margin-bottom: 10px;
}

.sidebar-block p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

.sidebar-block a {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
  display: inline-block;
}

/* ---- 相关链接导航 ---- */
.related-links {
  margin-top: 40px;
  padding: 20px 24px;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.related-links p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.related-links a {
  color: var(--color-primary);
  font-weight: 500;
  margin-right: 16px;
  white-space: nowrap;
}

.related-links a:hover {
  color: var(--color-accent);
}

/* ---- 反馈说明块 ---- */
.feedback-note {
  background-color: var(--color-bg-light);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 24px;
  max-width: 760px;
}

.feedback-note p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 12px;
}

.feedback-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 4px 0;
  border-bottom: 2px solid var(--color-accent);
}

.feedback-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* ---- 返回首页区块 ---- */
.back-home {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.back-home p {
  font-size: 15px;
  color: var(--color-text-light);
}

.back-home a {
  color: var(--color-accent);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   4. Pages —— 首页
   -------------------------------------------------------------------------- */

/* ---- 焦点区 ---- */
.hero-section {
  background-color: var(--color-primary);
  padding: 64px 0;
}

.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

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

.hero-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-cta {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.hero-cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

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

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* ---- 频道导航带 ---- */
.channel-bar {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.channel-tags li a {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  transition: all var(--transition-base);
}

.channel-tags li a:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* ---- 最新资讯列表 ---- */
.latest-news {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.section-head .section-title {
  margin-bottom: 0;
}

.section-more {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  padding: 6px 14px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.section-more:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

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

.news-item {
  border-bottom: 1px solid var(--color-border);
}

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

.news-link {
  display: block;
  padding: 20px 8px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.news-link:hover {
  background-color: var(--color-bg-light);
}

.news-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}

.news-link:hover .news-title {
  color: var(--color-accent);
}

.news-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.news-date {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ---- 专题推荐 ---- */
.topics-recommend {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.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-base), transform var(--transition-base);
}

.topic-card:hover {
  box-shadow: 0 6px 20px rgba(26, 58, 92, 0.12);
  transform: translateY(-2px);
}

.topic-link {
  display: block;
}

.topic-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.topic-link:hover .topic-title {
  color: var(--color-accent);
}

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

.topic-card .topic-link {
  padding: 20px;
}

/* ---- 编辑推荐 ---- */
.editor-picks {
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.editor-picks {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.pick-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: box-shadow var(--transition-base);
}

.pick-item:hover {
  box-shadow: 0 4px 16px rgba(26, 58, 92, 0.1);
}

.pick-link {
  display: block;
}

.pick-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.pick-link:hover .pick-title {
  color: var(--color-accent);
}

.pick-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.pick-reason {
  display: inline-block;
  font-size: 13px;
  color: var(--color-accent);
  background-color: rgba(230, 126, 34, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---- 信息来源与反馈 ---- */
.source-feedback {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

/* --------------------------------------------------------------------------
   5. Pages —— 频道分类（hlgw/channels.html）
   -------------------------------------------------------------------------- */

.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.channel-item {
  display: flex;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: box-shadow var(--transition-base);
}

.channel-item:hover {
  box-shadow: 0 4px 16px rgba(26, 58, 92, 0.1);
}

.channel-media {
  width: 120px;
  height: 90px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background-color: var(--color-bg-light);
}

.channel-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-info {
  min-width: 0;
  flex: 1;
}

.channel-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.channel-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.channel-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.channel-link:hover {
  color: var(--color-accent-dark);
}

/* ---- 频道内容预览 ---- */
.channel-preview-section {
  margin-top: 16px;
}

.preview-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.preview-group {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

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

.preview-items li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  display: flex;
  align-items: baseline;
}

.preview-items li::before {
  content: "";
  width: 4px;
  height: 4px;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin-right: 10px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   6. Pages —— 内容专题（hlgw/topics.html）
   -------------------------------------------------------------------------- */

.topic-grid {
  margin-bottom: 48px;
}

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

.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-base);
}

.topic-card:hover {
  box-shadow: 0 6px 20px rgba(26, 58, 92, 0.12);
}

.topic-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-body {
  padding: 20px;
}

.topic-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.topic-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-block;
}

.topic-link:hover {
  color: var(--color-accent-dark);
}

/* ---- 专题入口 ---- */
.topic-entry {
  margin-bottom: 48px;
}

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

.entry-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

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

.entry-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.entry-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.entry-link:hover {
  color: var(--color-accent-dark);
}

/* --------------------------------------------------------------------------
   7. Pages —— 事件时间线（hlgw/timeline.html）
   -------------------------------------------------------------------------- */

.timeline-section {
  margin-bottom: 48px;
}

.timeline-list {
  position: relative;
  padding-left: 32px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 4px solid var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-white);
}

.timeline-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: box-shadow var(--transition-base);
}

.timeline-content:hover {
  box-shadow: 0 4px 16px rgba(26, 58, 92, 0.08);
}

.timeline-date {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(230, 126, 34, 0.1);
  padding: 2px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---- 关键节点说明 ---- */
.timeline-detail-section {
  margin-bottom: 48px;
}

.timeline-detail-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.detail-item {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  border-left: 4px solid var(--color-primary);
}

.detail-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.timeline-media {
  margin-top: 24px;
}

.timeline-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.timeline-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  margin-top: 8px;
}

/* ---- 相关阅读 ---- */
.related-read {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

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

.related-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-list li:last-child {
  border-bottom: none;
}

.related-list li a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  display: block;
}

.related-list li a:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   8. Pages —— 阅读指南（hlgw/guide.html）
   -------------------------------------------------------------------------- */

.guide-section {
  margin-bottom: 48px;
}

.content-media-inline {
  margin-bottom: 24px;
}

.content-media-inline img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.content-media-inline figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  margin-top: 8px;
}

.guide-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}

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

.guide-item-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

.guide-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 10px;
}

.guide-item p:last-of-type {
  margin-bottom: 12px;
}

.guide-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-block;
}

.guide-item a:hover {
  color: var(--color-accent-dark);
}

/* ---- 阅读建议 ---- */
.guide-tips {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 48px;
}

.guide-tips p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

.guide-tips p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   9. Pages —— 404（404.html）
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

.error-block {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-size: 96px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.error-link {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.error-link:first-child {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.error-link:first-child:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.error-link:last-child {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.error-link:last-child:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.error-tip {
  font-size: 14px;
  color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   10. Responsive —— 响应式断点
   -------------------------------------------------------------------------- */

/* ---- 平板及以下（≤1024px） ---- */
@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .sidebar {
    order: 2;
  }

  .hero-section {
    gap: 32px;
  }
}

/* ---- 手机（≤768px） ---- */
@media (max-width: 768px) {
  .header-inner {
    min-height: 60px;
    padding: 0 16px;
    gap: 12px;
  }

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

  .nav-toggle {
    display: block;
    font-size: 20px;
    padding: 8px 12px;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }

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

  .nav-list li a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  .nav-list li a.is-current {
    border-bottom: 1px solid var(--color-border);
    color: var(--color-accent);
    background-color: var(--color-bg-light);
  }

  .site-nav {
    position: relative;
    justify-content: flex-end;
  }

  .inner-main {
    padding: 24px 16px 48px;
  }

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

  .page-header {
    margin-bottom: 28px;
    padding-bottom: 16px;
  }

  .breadcrumb {
    margin-bottom: 16px;
    font-size: 13px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 16px;
    gap: 24px;
  }

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

  .hero-desc {
    font-size: 15px;
  }

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

  .channel-bar,
  .latest-news,
  .topics-recommend,
  .editor-picks,
  .source-feedback {
    padding-left: 16px;
    padding-right: 16px;
  }

  .channel-bar {
    padding-top: 32px;
  }

  .topics-recommend {
    padding: 32px 16px;
  }

  .editor-picks {
    padding: 32px 16px;
  }

  .source-feedback {
    padding: 32px 16px;
  }

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

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

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

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

  .channel-item {
    flex-direction: column;
  }

  .channel-media {
    width: 100%;
    height: 160px;
  }

  .footer-inner {
    padding: 32px 16px 20px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-brand {
    margin-bottom: 24px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .error-code {
    font-size: 64px;
  }

  .error-title {
    font-size: 22px;
  }

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

  .timeline-list {
    padding-left: 24px;
  }

  .timeline-marker {
    left: -24px;
    width: 14px;
    height: 14px;
  }

  .timeline-content {
    padding: 16px;
  }

  .timeline-media img {
    height: 180px;
  }

  .content-media-inline img {
    height: 180px;
  }

  .guide-item {
    padding: 16px;
  }

  .related-links p {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .related-links a {
    margin-right: 0;
  }
}

/* ---- 小屏手机（≤390px） ---- */
@media (max-width: 390px) {
  .brand-logo {
    font-size: 16px;
  }

  .header-inner {
    gap: 8px;
  }

  .nav-toggle {
    padding: 6px 10px;
    font-size: 18px;
  }

  .hero-title {
    font-size: 22px;
  }

  .hero-media img {
    height: 180px;
  }

  .channel-tags {
    gap: 8px;
  }

  .channel-tags li a {
    padding: 8px 16px;
    font-size: 14px;
  }

  .news-link {
    padding: 16px 4px;
  }

  .news-title {
    font-size: 15px;
  }

  .topic-title {
    font-size: 16px;
  }

  .topic-body {
    padding: 16px;
  }

  .pick-item {
    padding: 16px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .section-title {
    font-size: 18px;
  }

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

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

  .error-link {
    text-align: center;
  }
}