/* ==========================================================================
   17吃瓜网 - 整站样式表
   设计方向：政府信息风 · 深蓝稳重 · 高信息密度
   版本：1.0
   ========================================================================== */

/* ==========================================================================
   Base — 基础变量、重置、字体、通用元素
   ========================================================================== */

:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #12293f;
  --color-primary-light: #2a4a6e;
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-border: #d0d7e2;
  --color-text: #2c3e50;
  --color-text-light: #5a6b7f;
  --color-text-muted: #8a97a8;
  --color-accent: #c9a86a;
  --color-accent-dark: #b08f4a;

  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;

  --container-width: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(26, 58, 92, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 58, 92, 0.1);
  --shadow-hover: 0 8px 24px rgba(26, 58, 92, 0.14);

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
}

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

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

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

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 16px;
}

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

figure {
  margin: 0;
}

/* 通用容器 */
.header-shell,
.footer-shell,
.hero-section,
.focus-report-section,
.channel-nav-section,
.latest-news-section,
.topic-recommend-section,
.editor-picks-section,
.source-info-section,
.inner-main .breadcrumb,
.inner-main .page-header,
.inner-main > section,
.inner-main > .page-layout,
.inner-main > aside,
.error-container {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   Layout — 全站布局骨架
   ========================================================================== */

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

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

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* 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 {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-primary);
  background-color: rgba(26, 58, 92, 0.06);
}

.nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(26, 58, 92, 0.1);
}

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  cursor: pointer;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

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

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

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: var(--space-2xl);
}

.footer-shell {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-md);
}

.footer-brand {
  margin-bottom: var(--space-lg);
}

.footer-site-name {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  max-width: 600px;
  line-height: 1.7;
}

.footer-links-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 14px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.footer-col ul a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: var(--space-md);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}

.footer-bottom p {
  margin-bottom: 0;
}

/* 主内容区 */
.site-main {
  min-height: 60vh;
}

/* 内页骨架 */
.inner-main {
  padding-top: var(--space-md);
  padding-bottom: var(--space-xl);
}

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

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

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

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

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

/* 页面标题区 */
.page-header {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-lg);
}

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

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 0;
  max-width: 720px;
}

/* 通用区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  position: relative;
  padding-left: 14px;
  border-left: 4px solid var(--color-primary);
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

/* ==========================================================================
   Components — 通用组件
   ========================================================================== */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

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

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

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

.btn-secondary:hover {
  background-color: rgba(26, 58, 92, 0.08);
  color: var(--color-primary);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 0.2s ease;
}

.text-link:hover {
  gap: 10px;
  color: var(--color-accent-dark);
}

/* 图片容器约束 */
figure img,
.channel-media img,
.topic-media img,
.article-media img,
.topic-card > img,
.hero-media img,
.guide-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 卡片通用 hover */
.channel-card,
.topic-card,
.focus-report-item,
.analysis-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.channel-card:hover,
.topic-card:hover,
.focus-report-item:hover,
.analysis-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* 相关推荐 */
.related-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-sm);
}

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

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

.related-links a,
.related-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  display: block;
  line-height: 1.5;
}

.related-links a:hover,
.related-list a:hover {
  color: var(--color-primary);
}

.related-list p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
  margin-bottom: 0;
}

/* ==========================================================================
   Pages — 首页
   ========================================================================== */

/* Hero 区 */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-xl);
  align-items: center;
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.hero-copy {
  padding: var(--space-md) 0;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.35;
  margin-bottom: var(--space-sm);
}

.hero-lead {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

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

.hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 4 / 3;
}

.hero-media img {
  object-fit: cover;
}

/* 焦点报道区 */
.focus-report-section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-lg);
}

.focus-report-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.focus-report-item {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.focus-report-media img {
  transition: transform 0.3s ease;
}

.focus-report-item:hover .focus-report-media img {
  transform: scale(1.03);
}

.focus-report-body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.focus-report-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

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

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

.focus-report-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 频道导航区 */
.channel-nav-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

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

.channel-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  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;
}

/* 最新资讯区 */
.latest-news-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.latest-news-section .section-title {
  margin-bottom: var(--space-md);
}

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

.news-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.news-title {
  font-size: 16px;
  font-weight: 600;
  grid-column: 1;
  grid-row: 1;
  margin-bottom: 4px;
}

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

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

.news-summary {
  font-size: 14px;
  color: var(--color-text-light);
  grid-column: 1;
  grid-row: 2;
  margin-bottom: 0;
  line-height: 1.6;
}

.news-date {
  grid-column: 2;
  grid-row: 1;
  font-size: 13px;
  white-space: nowrap;
}

/* 专题推荐区 */
.topic-recommend-section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-lg);
}

.topic-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.topic-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.topic-card > img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.topic-card-title {
  font-size: 18px;
  font-weight: 700;
  padding: var(--space-sm) var(--space-sm) 0;
  margin-bottom: 8px;
}

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

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

.topic-card-summary {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 0 var(--space-sm) var(--space-md);
  line-height: 1.7;
  margin-bottom: 0;
  flex: 1;
}

/* 编辑推荐区 */
.editor-picks-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

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

.pick-item {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-md);
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}

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

.pick-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 0;
}

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

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

.pick-reason {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 信息来源区 */
.source-info-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.source-info-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.source-info-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: var(--space-sm);
}

.source-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

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

/* ==========================================================================
   Pages — 频道分类页 (pindao.html)
   ========================================================================== */

.channel-list {
  margin-bottom: var(--space-xl);
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.channel-card {
  display: flex;
  gap: var(--space-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
}

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

.channel-media img {
  object-fit: cover;
}

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

.channel-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.channel-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 10px;
  flex: 1;
}

.channel-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

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

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

.intro-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.intro-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Pages — 内容专题页 (zhuanti.html)
   ========================================================================== */

.topic-list-section {
  margin-bottom: var(--space-xl);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.topic-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.topic-media img {
  object-fit: cover;
  transition: transform 0.3s ease;
}

.topic-card:hover .topic-media img {
  transform: scale(1.03);
}

.topic-content {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topic-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

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

.topic-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
  flex: 1;
}

.topic-content .text-link {
  align-self: flex-start;
  margin-top: auto;
}

/* 专题摘要区 */
.topic-summary-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-xl);
}

.summary-intro p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.summary-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.summary-item {
  padding: var(--space-sm);
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.summary-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

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

.summary-more {
  margin-top: var(--space-md);
  margin-bottom: 0;
}

.summary-more a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.summary-more a:hover {
  color: var(--color-accent-dark);
}

/* 相关推荐 */
.related-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

/* ==========================================================================
   Pages — 深度解读页 (jiedu.html)
   ========================================================================== */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-lg);
  align-items: start;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

/* 文章列表 */
.article-list-section {
  margin-bottom: var(--space-xl);
}

.article-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

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

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

.article-media {
  flex-shrink: 0;
  width: 220px;
  height: 140px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-media img {
  object-fit: cover;
  transition: transform 0.3s ease;
}

.article-item:hover .article-media img {
  transform: scale(1.03);
}

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

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}

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

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

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

.article-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-body .text-link {
  align-self: flex-start;
  margin-top: auto;
}

/* 分析角度 */
.analysis-section {
  margin-bottom: var(--space-xl);
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.analysis-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.analysis-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

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

/* 侧栏 */
.content-secondary {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.related-module {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

/* ==========================================================================
   Pages — 实用指南页 (zhinan.html)
   ========================================================================== */

.guide-list-section {
  margin-bottom: var(--space-xl);
}

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

.guide-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.guide-item-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

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

.guide-item-excerpt {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

.guide-item-date {
  font-size: 13px;
  color: var(--color-text-muted);
}

.guide-figure {
  margin-top: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.guide-figure img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.guide-figure figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 10px 16px;
  background-color: var(--color-surface);
  text-align: center;
}

/* 操作步骤 */
.steps-section {
  margin-bottom: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.step-item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

.step-content a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.step-content a:hover {
  color: var(--color-accent-dark);
}

/* FAQ */
.faq-section {
  margin-bottom: var(--space-xl);
}

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

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  position: relative;
  padding-right: 44px;
  list-style: none;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-primary);
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item summary:hover {
  color: var(--color-primary);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 相关推荐 */
.related-links {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

/* ==========================================================================
   Pages — 404 页面
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
  padding: var(--space-xl) 24px;
}

.error-container {
  text-align: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 640px;
  width: 100%;
}

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

.error-container h1 {
  font-size: 24px;
  margin-bottom: var(--space-sm);
}

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

.error-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-back-home,
.btn-browse-channel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-back-home {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

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

.btn-browse-channel:hover {
  background-color: rgba(26, 58, 92, 0.08);
  color: var(--color-primary);
}

/* ==========================================================================
   Responsive — 响应式断点
   断点：768px（手机 / 平板）
   ========================================================================== */

@media (max-width: 1024px) {
  /* 平板尺寸调整 */
  .article-item {
    flex-direction: column;
  }

  .article-media {
    width: 100%;
    height: 180px;
  }

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

  .channel-media {
    width: 100%;
    height: 140px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: var(--space-md);
  }
}

@media (max-width: 768px) {
  /* 容器内边距收紧 */
  .header-shell,
  .footer-shell,
  .hero-section,
  .focus-report-section,
  .channel-nav-section,
  .latest-news-section,
  .topic-recommend-section,
  .editor-picks-section,
  .source-info-section,
  .inner-main .breadcrumb,
  .inner-main .page-header,
  .inner-main > section,
  .inner-main > .page-layout,
  .inner-main > aside,
  .error-container {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

  .brand-tagline {
    font-size: 11px;
  }

  /* 汉堡菜单 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 0 16px;
    display: block;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0;
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--color-border);
  }

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

  .nav-list a {
    padding: 14px 12px;
    font-size: 16px;
    border-radius: 0;
  }

  .nav-list a.is-current {
    background-color: transparent;
    border-left: 3px solid var(--color-primary);
  }

  /* 首页 Hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
  }

  .hero-copy {
    padding: 0;
  }

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

  .hero-lead {
    font-size: 16px;
  }

  .hero-media {
    aspect-ratio: 16 / 9;
  }

  /* 首页模块 */
  .focus-report-grid {
    grid-template-columns: 1fr;
  }

  .channel-tag-list {
    gap: 8px;
  }

  .channel-tag {
    padding: 6px 14px;
    font-size: 13px;
  }

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

  .news-title {
    grid-column: 1;
    grid-row: 1;
  }

  .news-summary {
    grid-column: 1;
    grid-row: 2;
  }

  .news-date {
    grid-column: 1;
    grid-row: 3;
  }

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

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

  /* 内页通用 */
  .page-title {
    font-size: 24px;
  }

  .page-description {
    font-size: 15px;
  }

  /* 频道分类页 */
  .channel-grid {
    grid-template-columns: 1fr;
  }

  /* 专题页 */
  .topic-grid {
    grid-template-columns: 1fr;
  }

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

  /* 深度解读页 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .content-secondary {
    position: static;
  }

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

  /* 实用指南页 */
  .steps-list {
    gap: 12px;
  }

  .step-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .step-number {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  /* 页脚 */
  .footer-links-group {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .footer-shell {
    padding-top: var(--space-lg);
  }

  /* 404 */
  .error-code {
    font-size: 48px;
  }

  .error-container {
    padding: var(--space-lg);
  }

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

  .btn-back-home,
  .btn-browse-channel {
    width: 100%;
    max-width: 280px;
  }
}

@media (max-width: 480px) {
  /* 小屏手机 */
  .footer-links-group {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col-title {
    font-size: 14px;
  }

  .footer-col ul a {
    font-size: 13px;
  }

  .article-media {
    height: 160px;
  }

  .channel-media {
    height: 120px;
  }

  .guide-figure img {
    aspect-ratio: 4 / 3;
  }

  .hero-actions {
    flex-direction: column;
  }

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

/* ==========================================================================
   Accessibility & Motion — 可访问性与动效
   ========================================================================== */

@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;
  }
}

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 滚动出现动画（不影响初始可见性） */
@keyframes fadeInUp {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 确保所有内容默认可见 */
.hero-section,
.focus-report-section,
.channel-nav-section,
.latest-news-section,
.topic-recommend-section,
.editor-picks-section,
.source-info-section,
.channel-list,
.topic-list-section,
.article-list-section,
.guide-list-section,
.steps-section,
.faq-section {
  opacity: 1;
}