/* ==========================================================================
   base — 基础变量、重置与全局排版
   ========================================================================== */
:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #142c47;
  --color-accent: #e67e22;
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-text: #333333;
  --color-text-light: #6b7a8a;
  --color-border: #e3e8ee;
  --radius: 8px;
  --shadow-sm: 0 1px 3px rgba(26, 58, 92, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 58, 92, 0.1);
  --container-width: 1200px;
  --font-family: Arial, Helvetica, "PingFang SC", "Microsoft YaHei", sans-serif;
  --header-height: 68px;
}

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

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);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.5rem;
}

time {
  color: var(--color-text-light);
  font-size: 14px;
}

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

.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

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

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  white-space: nowrap;
}

.site-nav .nav-list {
  display: flex;
  gap: 4px;
}

.site-nav .nav-list li a {
  display: block;
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav .nav-list li a:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
}

.site-nav .nav-list li a.is-current {
  color: #ffffff;
  background-color: var(--color-accent);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.site-main {
  flex: 1;
}

.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  margin-top: 60px;
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 28px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  display: inline-block;
  margin-bottom: 12px;
}

.brand-col p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h3 {
  font-size: 16px;
  color: #ffffff;
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  margin: 0;
}

/* 内页统一布局骨架 */
.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.layout-shell.sidebar-right {
  grid-template-columns: minmax(0, 1fr) 300px;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-light);
  padding: 20px 0 12px;
}

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

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

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 600;
}

.breadcrumb-sep {
  color: #b0bcc9;
  margin: 0 2px;
}

/* 页面标题区 */
.page-header {
  padding: 8px 0 24px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 680px;
  line-height: 1.7;
}

/* 侧栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 0;
}

.sidebar-block,
.sidebar-card {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.sidebar-block h2,
.sidebar-block h3,
.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

.sidebar-list li,
.sidebar-block ul li {
  padding: 8px 0;
  border-bottom: 1px solid #f0f2f5;
}

.sidebar-list li:last-child,
.sidebar-block ul li:last-child {
  border-bottom: none;
}

.sidebar-list li a,
.sidebar-block ul li a {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.5;
  display: block;
}

.sidebar-list li a:hover,
.sidebar-block ul li a:hover {
  color: var(--color-accent);
}

/* ==========================================================================
   components — 通用组件
   ========================================================================== */
.section-intro {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: 20px;
  max-width: 720px;
}

/* 通用卡片 */
.special-card {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.special-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

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

.special-card h3 {
  font-size: 17px;
  padding: 14px 16px 6px;
}

.special-card h3 a {
  color: var(--color-primary);
}

.special-card h3 a:hover {
  color: var(--color-accent);
}

.special-card p {
  padding: 0 16px 16px;
  font-size: 14px;
  color: var(--color-text-light);
}

/* 编辑推荐 */
.pick-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.pick-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: box-shadow 0.2s ease;
}

.pick-item:hover {
  box-shadow: var(--shadow-md);
}

.pick-reason {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 700;
}

.pick-item a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
}

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

/* ==========================================================================
   pages — 首页
   ========================================================================== */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* 焦点报道区 */
.featured-report {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 28px 0 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.featured-media {
  min-height: 320px;
}

.featured-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

.featured-content {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.featured-content h1 {
  font-size: 28px;
  line-height: 1.35;
  margin-bottom: 0;
}

.featured-content p {
  color: var(--color-text-light);
  font-size: 15px;
  line-height: 1.7;
}

.featured-link {
  display: inline-block;
  align-self: flex-start;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 10px 24px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.featured-link:hover {
  background-color: #c96a12;
  color: #ffffff;
}

.quick-channels {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.quick-channels li a {
  display: inline-block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.quick-channels li a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* 频道分类导航带 */
.channel-nav-strip {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
}

.channel-nav-strip h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

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

.channel-tag {
  display: inline-block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.channel-tag:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

/* 最新资讯列表 */
.latest-news {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.latest-news h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.news-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid #f0f2f5;
}

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

.news-item time {
  font-size: 13px;
  padding-top: 2px;
}

.news-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.news-item h3 a {
  color: var(--color-primary);
  font-weight: 600;
}

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

.news-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.6;
}

/* 专题推荐区 */
.special-recommend {
  margin-bottom: 32px;
}

.special-recommend h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

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

/* 编辑推荐 */
.editor-picks {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.editor-picks h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

/* 信息来源与反馈 */
.source-feedback {
  background-color: var(--color-primary);
  border-radius: var(--radius);
  padding: 36px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.85);
}

.source-feedback h2 {
  color: #ffffff;
  margin-bottom: 14px;
}

.source-feedback p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 0;
}

/* ==========================================================================
   pages — 频道分类页
   ========================================================================== */
.channel-index {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}

.channel-index h2 {
  margin-bottom: 8px;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.channel-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
  background-color: var(--color-surface);
}

.channel-card:hover {
  box-shadow: var(--shadow-md);
}

.channel-card a {
  display: block;
}

.channel-card img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.channel-card h3 {
  font-size: 16px;
  padding: 12px 14px 4px;
  color: var(--color-primary);
}

.channel-card p {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 0 14px 14px;
  margin: 0;
  line-height: 1.5;
}

.channel-links,
.related-links {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.channel-links h2,
.related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.channel-links ul li {
  padding: 8px 0;
  border-bottom: 1px solid #f0f2f5;
}

.channel-links ul li:last-child,
.related-links ul li:last-child {
  border-bottom: none;
}

.channel-links ul li a,
.related-links ul li a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.channel-links ul li a:hover,
.related-links ul li a:hover {
  color: var(--color-accent);
}

/* ==========================================================================
   pages — 内容专题页
   ========================================================================== */
.main-content {
  min-width: 0;
}

.special-list-section {
  margin-bottom: 28px;
}

.special-list-section h2 {
  margin-bottom: 8px;
}

.special-card-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.special-cover {
  height: 160px;
  overflow: hidden;
}

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

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

.special-card-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.special-card-body h3 a:hover {
  color: var(--color-accent);
}

.special-card-body p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

.special-note-section {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.special-note-section h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

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

.sidebar-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sidebar-tag-list li a {
  display: inline-block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-tag-list li a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* ==========================================================================
   pages — 实用指南页
   ========================================================================== */
.intro-text {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 720px;
}

.guide-section h2 {
  margin-bottom: 8px;
}

.guide-item {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  transition: box-shadow 0.2s ease;
}

.guide-item:hover {
  box-shadow: var(--shadow-md);
}

.guide-item-text {
  min-width: 0;
}

.guide-item-title {
  font-size: 17px;
  margin-bottom: 8px;
}

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

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

.guide-item-meta {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.guide-item-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 10px;
}

.guide-item-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.guide-item-figure {
  width: 220px;
  height: 140px;
  overflow: hidden;
  border-radius: var(--radius);
}

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

.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.related-links-item {
  display: inline-block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* ==========================================================================
   pages — 深度解读页
   ========================================================================== */
.insight-list-section {
  margin-bottom: 32px;
}

.insight-list-section h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.insight-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  transition: box-shadow 0.2s ease;
}

.insight-item:hover {
  box-shadow: var(--shadow-md);
}

.insight-media {
  width: 240px;
  height: 160px;
  overflow: hidden;
  border-radius: var(--radius);
}

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

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

.insight-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.insight-content h3 a {
  color: var(--color-primary);
}

.insight-content h3 a:hover {
  color: var(--color-accent);
}

.insight-meta {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.insight-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 6px;
}

.insight-content a {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.framework-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.framework-section h2 {
  margin-bottom: 12px;
}

.framework-section p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.framework-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.framework-list li {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--color-text);
}

.framework-list li strong {
  display: block;
  color: var(--color-primary);
  margin-bottom: 4px;
  font-size: 15px;
}

.related-section {
  margin-bottom: 32px;
}

.related-section h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow 0.2s ease;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
}

.related-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.related-card h3 a {
  color: var(--color-primary);
}

.related-card h3 a:hover {
  color: var(--color-accent);
}

.related-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.5;
}

/* ==========================================================================
   pages — 404 页
   ========================================================================== */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  flex: 1;
}

.error-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 56px 48px;
  text-align: center;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow-sm);
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: 28px;
}

.error-btn {
  display: inline-block;
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 12px 32px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* ==========================================================================
   responsive — 响应式
   ========================================================================== */
@media (max-width: 992px) {
  .layout-shell,
  .layout-shell.sidebar-right {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }

  .layout-shell .inner-main {
    order: 1;
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .featured-report {
    grid-template-columns: 1fr;
  }

  .featured-media {
    min-height: 240px;
  }

  .featured-media img {
    min-height: 240px;
  }

  .insight-item {
    grid-template-columns: 1fr;
  }

  .insight-media {
    width: 100%;
    height: 200px;
  }

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

  .guide-item-figure {
    width: 100%;
    height: 180px;
  }

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

@media (max-width: 768px) {
  .header-shell {
    height: auto;
    min-height: var(--header-height);
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 8px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: block;
    margin-left: auto;
  }

  .site-nav {
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 8px 0 16px;
    gap: 0;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 0;
  }

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

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

  .footer-bottom {
    padding: 16px;
  }

  .special-grid,
  .pick-list,
  .channel-grid,
  .special-card-list,
  .framework-list {
    grid-template-columns: 1fr;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .news-item time {
    margin-bottom: 4px;
  }

  .featured-content {
    padding: 24px 20px;
  }

  .featured-content h1 {
    font-size: 22px;
  }

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

  .layout-shell {
    padding: 0 16px;
  }

  .home-main {
    padding: 0 16px;
  }

  .channel-nav-strip,
  .latest-news,
  .editor-picks,
  .source-feedback,
  .channel-index,
  .channel-links,
  .related-links,
  .framework-section {
    padding: 20px 16px;
  }

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

  .error-panel {
    padding: 40px 24px;
  }

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

  .quick-channels {
    gap: 8px;
  }

  .quick-channels li a {
    padding: 6px 12px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 20px;
  }

  .footer-col h3 {
    font-size: 15px;
  }

  .special-card img,
  .special-cover {
    height: 140px;
  }

  .guide-item-figure,
  .insight-media {
    height: 160px;
  }

  .sidebar-block,
  .sidebar-card {
    padding: 16px;
  }
}