/* ============================================================
   51在线吃瓜 - 整站样式表
   版本: 1.0
   说明: 覆盖首页、内页、404页全部真实DOM结构
   ============================================================ */

/* ============================================================
   1. Base - 基础变量、重置、全局样式
   ============================================================ */
:root {
  --color-bg: #f5f7fa;
  --color-primary: #0f766e;
  --color-primary-dark: #115e59;
  --color-primary-light: #ccfbf1;
  --color-text: #1e293b;
  --color-text-secondary: #94a3b8;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --color-card-bg: #ffffff;
  --color-text-muted: #64748b;
  --color-hover-bg: #f1f5f9;
  --color-rank-1: #0f766e;
  --color-rank-2: #0d9488;
  --color-rank-3: #14b8a6;
  --color-rank-normal: #64748b;
  --color-footer-bg: #1e293b;
  --color-footer-text: #cbd5e1;
  --color-footer-heading: #f1f5f9;
  --color-footer-border: #334155;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --container-width: 1200px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --transition-base: 0.2s ease;
  --shadow-sm: 0 1px 2px rgba(30, 41, 59, 0.06);
  --shadow-md: 0 4px 12px rgba(30, 41, 59, 0.08);
  --shadow-lg: 0 8px 24px rgba(30, 41, 59, 0.1);
  --sidebar-width: 240px;
  --content-max-width: 720px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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-primary-dark);
}

ul,
ol {
  list-style: none;
}

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

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

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================================
   2. Layout - 布局容器、网格系统、侧栏结构
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.site-inner {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.home-main {
  width: 100%;
}

.inner-main {
  width: 100%;
  padding-bottom: 48px;
}

/* 通用内容宽度容器 */
.header-inner,
.footer-inner,
.hero-section,
.focus-report-section,
.channel-section,
.latest-section,
.topic-section,
.editor-pick-section,
.source-feedback-section,
.inner-main > .breadcrumb,
.inner-main > .page-header,
.inner-main > .filter-tabs,
.inner-main > .latest-list-section,
.inner-main > .layout-shell,
.inner-main > .page-layout,
.inner-main > .related-links,
.error-section,
.error-suggest {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 首页各模块间距统一 */
.home-main section {
  padding-top: 48px;
  padding-bottom: 48px;
}

/* 内页布局：侧栏在左，主内容在右 */
.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

/* 内页布局：侧栏在右（默认结构） */
.page-layout:not(.sidebar-left) {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
  gap: 32px;
  align-items: start;
}

/* 侧栏通用样式 */
.page-sidebar,
.sidebar,
.guide-sidebar {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-list li {
  margin-bottom: 2px;
}

.sidebar-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.5;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.sidebar-list a:hover {
  background-color: var(--color-hover-bg);
  color: var(--color-primary);
}

.sidebar-list a.is-active {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 600;
}

/* 内容区域 */
.page-content,
.content-area {
  min-width: 0;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 20px;
  padding-bottom: 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

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

.breadcrumb-sep {
  color: var(--color-text-secondary);
  margin: 0 2px;
}

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

/* 页面标题区 */
.page-header {
  padding-top: 8px;
  padding-bottom: 24px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

/* 通用 section 标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  margin-top: 8px;
}

/* ============================================================
   3. Components - 通用组件
   ============================================================ */
/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: background-color var(--transition-base), color var(--transition-base),
    border-color var(--transition-base), transform var(--transition-base);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* 更多链接 */
.more-link {
  text-align: center;
  margin-top: 24px;
}

.more-link a {
  display: inline-block;
  padding: 8px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: border-color var(--transition-base), color var(--transition-base),
    background-color var(--transition-base);
  min-height: 44px;
  line-height: 28px;
}

.more-link a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}

/* 相关链接导航 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  padding-bottom: 24px;
  border-top: 1px solid var(--color-border);
  margin-top: 32px;
}

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

.related-links a,
.related-links-item {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.6;
  transition: border-color var(--transition-base), color var(--transition-base),
    background-color var(--transition-base);
}

.related-links a:hover,
.related-links-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-hover-bg);
}

/* ============================================================
   4. Header - 页头与导航
   ============================================================ */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
  white-space: nowrap;
}

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

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

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
  line-height: 1.5;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background-color: transparent;
  transition: background-color var(--transition-base);
}

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

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 汉堡按钮展开状态 */
.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);
}

/* ============================================================
   5. Footer - 页脚
   ============================================================ */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: auto;
  width: 100%;
}

.footer-inner {
  padding-top: 48px;
  padding-bottom: 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 32px;
}

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

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-footer-text);
  max-width: 280px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-footer-heading);
  margin-bottom: 16px;
}

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

.footer-list a {
  font-size: 14px;
  color: var(--color-footer-text);
  transition: color var(--transition-base);
  line-height: 1.6;
}

.footer-list a:hover {
  color: var(--color-white);
}

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid var(--color-footer-border);
  padding-top: 20px;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-footer-text);
  line-height: 1.6;
}

/* ============================================================
   6. Home Page - 首页组件
   ============================================================ */
/* 首屏 Hero */
.hero-section {
  padding-top: 56px;
  padding-bottom: 56px;
  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: 800;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-border);
}

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

/* 焦点报道 */
.focus-report-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.focus-report-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.focus-report-text {
  min-width: 0;
}

.focus-report-title {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

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

.focus-report-title a:hover {
  color: var(--color-primary);
}

.focus-report-summary {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.focus-report-figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.focus-report-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

/* 频道导航 */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.channel-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base),
    transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.channel-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.channel-icon {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 12px;
  display: block;
}

.channel-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.channel-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: 12px;
}

.channel-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-base), color var(--transition-base);
}

.channel-link:hover {
  gap: 8px;
  color: var(--color-primary-dark);
}

/* 最新资讯列表 */
.latest-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.latest-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

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

.latest-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.latest-meta time {
  color: var(--color-text-secondary);
}

.latest-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.latest-title a {
  color: var(--color-text);
  transition: color var(--transition-base);
}

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

.latest-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 专题推荐 */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: var(--color-card-bg);
  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: var(--shadow-md);
  transform: translateY(-2px);
}

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

.topic-body {
  padding: 20px;
}

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

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

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

.topic-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

/* 编辑推荐 */
.editor-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.editor-item {
  display: flex;
  gap: 20px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  align-items: flex-start;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.editor-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.editor-rank {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  flex-shrink: 0;
  min-width: 40px;
  text-align: center;
}

.editor-content {
  flex: 1;
  min-width: 0;
}

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

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

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

.editor-reason {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* 信息来源与反馈 */
.source-feedback-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.source-box {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.source-text,
.feedback-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.source-text strong,
.feedback-text strong {
  display: block;
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.feedback-text a {
  color: var(--color-primary);
  font-weight: 500;
}

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

/* ============================================================
   7. Inner Pages - 内页组件
   ============================================================ */
/* 频道列表页 */
.channel-card .channel-cover {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.channel-card .channel-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.channel-card .channel-body .channel-name {
  font-size: 18px;
  margin-bottom: 6px;
}

.channel-card .channel-body .channel-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: 12px;
}

.channel-card .channel-body .channel-link {
  margin-top: auto;
}

/* 频道简介 */
.intro-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

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

.intro-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* 专题页 */
.topic-highlight {
  margin-bottom: 48px;
}

.topic-highlight .section-title {
  font-size: 22px;
}

.section-intro {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

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

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

.topic-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

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

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

.topic-card-body .topic-link {
  font-size: 14px;
  font-weight: 500;
}

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

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

.topic-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.topic-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.topic-item-text h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.topic-item-text h3 a:hover {
  color: var(--color-primary);
}

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

/* 阅读路径 */
.reading-path {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.reading-path h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.reading-path > p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.path-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.path-list li {
  flex: 1;
  min-width: 200px;
}

.path-list a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base),
    background-color var(--transition-base);
}

.path-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* 最新资讯页 */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 24px;
}

.filter-tab {
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  min-height: 44px;
  transition: border-color var(--transition-base), color var(--transition-base),
    background-color var(--transition-base);
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.is-active {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.latest-list-section {
  padding-bottom: 32px;
}

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

.latest-list-section .latest-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.latest-list-section .latest-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.latest-link {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  text-decoration: none;
  color: inherit;
}

.latest-media {
  flex-shrink: 0;
  width: 160px;
  height: 100px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: var(--color-border);
}

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

.latest-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.latest-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
}

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

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

.latest-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

/* 排行页 */
.sidebar-related {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.rank-section {
  margin-bottom: 48px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.rank-section .section-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.rank-list {
  counter-reset: rank;
  display: flex;
  flex-direction: column;
}

.rank-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.rank-number {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-rank-normal);
  min-width: 36px;
  text-align: center;
}

.rank-item:nth-child(1) .rank-number {
  color: var(--color-rank-1);
}

.rank-item:nth-child(2) .rank-number {
  color: var(--color-rank-2);
}

.rank-item:nth-child(3) .rank-number {
  color: var(--color-rank-3);
}

.rank-item-body {
  flex: 1;
  min-width: 0;
}

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

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

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

.rank-item-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.rank-item-tag {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* 编辑推荐（排行页） */
.editor-pick-figure {
  margin: 0 0 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.editor-pick-img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.editor-pick-figure figcaption {
  padding: 8px 0 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

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

.editor-pick-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color var(--transition-base);
}

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

.editor-pick-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.editor-pick-title {
  font-size: 15px;
  font-weight: 600;
}

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

.editor-pick-title a:hover {
  color: var(--color-primary);
}

.editor-pick-reason,
.editor-pick-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* 排行说明 */
.rank-note-list {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rank-note-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

/* 实用指南页 */
.guide-content {
  min-width: 0;
  width: 100%;
}

.content-section {
  margin-bottom: 48px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.content-section .section-title {
  font-size: 22px;
  margin-bottom: 12px;
}

.section-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* 步骤 */
.step-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

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

.step-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.guide-figure {
  margin: 20px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.guide-figure figcaption {
  padding: 8px 0 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.guide-content > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

/* 谣言卡片 */
.rumor-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

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

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

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

/* 提示列表 */
.tip-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tip-list li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
}

.tip-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.tip-list strong {
  font-weight: 600;
  color: var(--color-text);
}

/* 习惯列表 */
.habit-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.habit-list li {
  font-size: 15px;
  line-height: 1.7;
}

.habit-list a {
  color: var(--color-primary);
  font-weight: 500;
}

.habit-list a:hover {
  text-decoration: underline;
}

/* ============================================================
   8. 404 Page - 错误页
   ============================================================ */
.error-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

.error-section {
  text-align: center;
  max-width: 480px;
  margin-bottom: 48px;
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.error-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  transition: background-color var(--transition-base);
}

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

.error-suggest {
  width: 100%;
  max-width: 480px;
  text-align: center;
}

.error-subtitle {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

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

.error-list a {
  display: block;
  padding: 10px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.error-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================================
   9. Responsive - 响应式断点
   ============================================================ */
/* 平板与窄桌面 */
@media (max-width: 1024px) {
  .channel-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
  }

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

  .sidebar-left,
  .page-layout:not(.sidebar-left) {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
  }
}

/* 移动端断点 */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: var(--header-height);
    padding-top: 8px;
    padding-bottom: 8px;
    flex-wrap: wrap;
    position: relative;
  }

  .brand {
    flex: 1;
  }

  .nav-toggle {
    display: flex;
    order: 3;
    margin-left: auto;
  }

  .site-nav {
    width: 100%;
    order: 4;
    flex-basis: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: 8px 0;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    padding: 12px 16px;
    border-radius: 0;
    font-size: 16px;
  }

  .nav-list a.is-current {
    background-color: var(--color-primary-light);
  }

  /* 首页 Hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 32px;
  }

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

  .hero-figure img {
    height: 240px;
  }

  /* 焦点报道 */
  .focus-report-card {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px;
  }

  .focus-report-figure img {
    height: 200px;
  }

  /* 频道网格 */
  .channel-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 专题网格 */
  .topic-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 编辑推荐 */
  .editor-item {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .editor-rank {
    min-width: auto;
    text-align: left;
  }

  /* 来源与反馈 */
  .source-box {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px;
  }

  /* 内页布局切换为单列 */
  .sidebar-left,
  .page-layout:not(.sidebar-left) {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .page-sidebar,
  .sidebar,
  .guide-sidebar {
    position: static;
    margin-bottom: 24px;
  }

  .page-layout:not(.sidebar-left) .page-content {
    order: 1;
  }

  .page-layout:not(.sidebar-left) .page-sidebar {
    order: 2;
  }

  /* 内页标题 */
  .page-title {
    font-size: 26px;
  }

  /* 最新资讯列表 */
  .latest-link {
    flex-direction: column;
  }

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

  /* 排行 */
  .rank-section {
    padding: 16px;
  }

  .rank-item {
    gap: 12px;
  }

  .rank-number {
    font-size: 18px;
    min-width: 28px;
  }

  /* 指南 */
  .content-section {
    padding: 20px;
  }

  .step-item {
    flex-direction: column;
    gap: 8px;
  }

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

  /* 简介列表 */
  .intro-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 面包屑 */
  .breadcrumb {
    padding-top: 16px;
    padding-bottom: 12px;
    font-size: 13px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding-top: 32px;
  }

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

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

  .error-main {
    padding: 48px 24px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .header-inner,
  .hero-section,
  .focus-report-section,
  .channel-section,
  .latest-section,
  .topic-section,
  .editor-pick-section,
  .source-feedback-section,
  .inner-main > .breadcrumb,
  .inner-main > .page-header,
  .inner-main > .filter-tabs,
  .inner-main > .latest-list-section,
  .inner-main > .layout-shell,
  .inner-main > .page-layout,
  .inner-main > .related-links,
  .error-section,
  .error-suggest {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-tagline {
    display: none;
  }

  .brand-name {
    font-size: 20px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

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

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

/* 滚动出现动画（非阻塞增强） */
@media (prefers-reduced-motion: no-preference) {
  .channel-card,
  .topic-card,
  .editor-item,
  .latest-item {
    transition: box-shadow var(--transition-base), border-color var(--transition-base),
      transform var(--transition-base);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}