/* ==========================================================================
   吃瓜大全 - 全站样式表
   报纸编辑风：黑白为主，标题层级分明，细分隔线，多栏内容
   ========================================================================== */

/* ==========================================================================
   Base - 基础样式
   ========================================================================== */
*,
*::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: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #333333;
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #333333;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #000000;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-weight: 700;
  line-height: 1.4;
  color: #000000;
}

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

/* 统一容器宽度 */
.header-inner,
.site-main,
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
}

/* 页头 */
.site-header {
  background-color: #ffffff;
  border-bottom: 3px solid #000000;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.brand {
  flex-shrink: 0;
}

.brand a {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 26px;
  font-weight: 900;
  color: #000000;
  letter-spacing: 2px;
}

.brand-tag {
  font-size: 12px;
  color: #666666;
  letter-spacing: 1px;
}

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

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-list li a {
  display: block;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: #333333;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: #000000;
  border-bottom-color: #000000;
}

.nav-list li a.is-current {
  color: #000000;
  border-bottom-color: #000000;
  font-weight: 700;
}

/* 汉堡按钮 - 默认隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid #333333;
  border-radius: 4px;
  cursor: pointer;
  gap: 5px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #000000;
  transition: transform 0.3s ease, opacity 0.3s 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);
}

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

/* 页脚 */
.site-footer {
  background-color: #f5f5f5;
  border-top: 3px solid #000000;
  margin-top: 64px;
}

.footer-inner {
  padding-top: 48px;
  padding-bottom: 32px;
}

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

.footer-logo {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 22px;
  font-weight: 900;
  color: #000000;
}

.footer-slogan {
  font-size: 14px;
  color: #666666;
  margin-top: 4px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 32px 0;
  border-top: 1px solid #dddddd;
  border-bottom: 1px solid #dddddd;
}

.link-group h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #000000;
}

.link-group ul li {
  margin-bottom: 8px;
}

.link-group ul li a {
  font-size: 14px;
  color: #666666;
}

.link-group ul li a:hover {
  color: #000000;
}

.footer-bottom {
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #999999;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #666666;
  padding: 16px 0;
  border-bottom: 1px solid #eeeeee;
  margin-bottom: 32px;
}

.breadcrumb a {
  color: #666666;
}

.breadcrumb a:hover {
  color: #000000;
}

.breadcrumb-current {
  color: #000000;
  font-weight: 500;
}

.breadcrumb-sep {
  color: #999999;
}

/* 内页标题区 */
.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.page-description {
  font-size: 16px;
  color: #666666;
  max-width: 720px;
}

/* 通用区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid #000000;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 60px;
  height: 2px;
  background-color: #000000;
}

/* ==========================================================================
   Components - 公共组件
   ========================================================================== */

/* 内页双栏布局 */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

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

/* 侧栏 */
.sidebar {
  min-width: 0;
}

.sidebar-inner {
  position: sticky;
  top: 96px;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #000000;
}

.sidebar-text {
  font-size: 14px;
  color: #666666;
  margin-bottom: 16px;
  line-height: 1.8;
}

.sidebar-note {
  background-color: #f5f5f5;
  padding: 16px;
  margin-bottom: 24px;
  border-left: 3px solid #000000;
}

.sidebar-note p {
  font-size: 14px;
  color: #333333;
  line-height: 1.8;
}

.sidebar-nav {
  border-top: 1px solid #eeeeee;
  padding-top: 16px;
}

.sidebar-nav-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #000000;
}

.sidebar-nav ul li {
  margin-bottom: 8px;
}

.sidebar-nav ul li a {
  font-size: 14px;
  color: #666666;
  padding-left: 12px;
  border-left: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.sidebar-nav ul li a:hover {
  color: #000000;
  border-left-color: #000000;
}

/* 侧栏卡片 */
.sidebar-card {
  background-color: #f5f5f5;
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid #eeeeee;
}

.sidebar-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.sidebar-card p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* 话题卡片 */
.topic-card {
  background-color: #ffffff;
  border: 1px solid #eeeeee;
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.topic-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.topic-card a {
  display: block;
}

.topic-card figure {
  position: relative;
  overflow: hidden;
}

.topic-card figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.topic-card figure figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: #ffffff;
  font-size: 13px;
}

.topic-card h3 {
  font-size: 17px;
  font-weight: 700;
  padding: 16px 16px 8px;
}

.topic-card p {
  font-size: 14px;
  color: #666666;
  padding: 0 16px 16px;
  line-height: 1.7;
}

/* 相关阅读列表 */
.related-list li {
  margin-bottom: 12px;
}

.related-list li a {
  display: block;
  padding: 12px 16px;
  background-color: #f5f5f5;
  border-left: 3px solid #000000;
  font-size: 15px;
  transition: background-color 0.2s ease, padding-left 0.2s ease;
}

.related-list li a:hover {
  background-color: #eeeeee;
  padding-left: 20px;
}

/* ==========================================================================
   Pages - 首页
   ========================================================================== */

/* 焦点报道区 */
.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 3px solid #000000;
}

.hero-kicker {
  font-size: 14px;
  font-weight: 700;
  color: #666666;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 38px;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-summary {
  font-size: 16px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background-color: #000000;
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.hero-link:hover {
  background-color: #333333;
  color: #ffffff;
}

.hero-link span {
  font-size: 18px;
}

.hero-media {
  position: relative;
}

.hero-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border: 1px solid #eeeeee;
}

.hero-media figcaption {
  font-size: 13px;
  color: #666666;
  padding: 8px 0;
  border-bottom: 1px solid #eeeeee;
}

/* 频道导航带 */
.channel-strip {
  padding: 40px 0;
  border-bottom: 1px solid #eeeeee;
}

.channel-tags {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.channel-tags li a {
  display: block;
  padding: 10px 24px;
  background-color: #f5f5f5;
  border: 1px solid #eeeeee;
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.channel-tags li a:hover {
  background-color: #000000;
  border-color: #000000;
  color: #ffffff;
}

/* 最新资讯 */
.latest-news {
  padding: 40px 0;
  border-bottom: 1px solid #eeeeee;
}

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

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

.section-more {
  font-size: 14px;
  color: #666666;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.section-more:hover {
  color: #000000;
  border-bottom-color: #000000;
}

.news-list li {
  border-bottom: 1px solid #eeeeee;
}

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

.news-item {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 20px 0;
}

.news-item time {
  font-size: 14px;
  color: #999999;
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

.news-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.news-item h3 a {
  color: #000000;
}

.news-item h3 a:hover {
  text-decoration: underline;
}

.news-item p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* 专题推荐 */
.topic-feature {
  padding: 40px 0;
  border-bottom: 1px solid #eeeeee;
}

.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

/* 编辑推荐 */
.editorial-picks {
  padding: 40px 0;
  border-bottom: 1px solid #eeeeee;
}

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

.editorial-item {
  border: 1px solid #eeeeee;
  transition: background-color 0.2s ease;
}

.editorial-item:hover {
  background-color: #f5f5f5;
}

.editorial-item a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
}

.ed-index {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 24px;
  font-weight: 900;
  color: #999999;
  min-width: 48px;
}

.ed-text {
  flex: 1;
  font-size: 16px;
  font-weight: 500;
  color: #000000;
}

.ed-arrow {
  font-size: 20px;
  color: #999999;
  transition: transform 0.2s ease, color 0.2s ease;
}

.editorial-item:hover .ed-arrow {
  transform: translateX(4px);
  color: #000000;
}

/* 信息来源与反馈 */
.source-note {
  padding: 40px 0;
}

.source-note p {
  font-size: 15px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 720px;
}

.source-note a {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: #000000;
  border-bottom: 2px solid #000000;
  padding-bottom: 2px;
}

.source-note a:hover {
  color: #666666;
  border-bottom-color: #666666;
}

/* ==========================================================================
   Pages - 频道分类页
   ========================================================================== */

.channel-list-section {
  margin-bottom: 40px;
}

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

.channel-item {
  border: 1px solid #eeeeee;
  transition: box-shadow 0.3s ease;
}

.channel-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.channel-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 24px;
}

.channel-media img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.channel-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.channel-name {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.channel-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
}

.channel-link {
  font-size: 14px;
  font-weight: 500;
  color: #000000;
  border-bottom: 1px solid #000000;
  align-self: flex-start;
  padding-bottom: 2px;
}

.channel-link:hover {
  color: #666666;
  border-bottom-color: #666666;
}

/* ==========================================================================
   Pages - 内容专题页
   ========================================================================== */

.topics-intro {
  margin-bottom: 48px;
}

.intro-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.intro-content p {
  font-size: 15px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.intro-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.intro-media figcaption {
  font-size: 13px;
  color: #999999;
  padding: 8px 0;
}

.topics-list-section {
  margin-bottom: 48px;
}

.topics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

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

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

.topic-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  background-color: #000000;
  padding: 4px 12px;
  margin-bottom: 12px;
}

.topic-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.topic-summary {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 8px;
}

.topic-date {
  font-size: 13px;
  color: #999999;
  margin-bottom: 12px;
}

.topic-card-body p a {
  font-size: 14px;
  font-weight: 500;
  color: #000000;
  border-bottom: 1px solid #000000;
  padding-bottom: 2px;
}

.topic-card-body p a:hover {
  color: #666666;
  border-bottom-color: #666666;
}

/* 延伸题材 */
.related-topics {
  margin-bottom: 48px;
}

.related-links {
  background-color: #f5f5f5;
  padding: 24px;
}

.related-links p {
  font-size: 14px;
  color: #666666;
  margin-bottom: 16px;
}

.related-list li a {
  background-color: #ffffff;
}

/* 反馈说明 */
.feedback-note {
  background-color: #f5f5f5;
  padding: 24px;
  border-left: 4px solid #000000;
}

.feedback-note p {
  font-size: 14px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 8px;
}

.feedback-note p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Pages - 深度解读页
   ========================================================================== */

.article-block {
  margin-bottom: 48px;
}

.article-block h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.article-lead {
  font-size: 17px;
  font-weight: 500;
  color: #333333;
  line-height: 1.9;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 3px solid #000000;
}

.article-figure {
  margin: 24px 0;
}

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

.article-figure figcaption {
  font-size: 13px;
  color: #999999;
  padding: 8px 0;
  border-bottom: 1px solid #eeeeee;
}

.article-block p {
  font-size: 15px;
  color: #333333;
  line-height: 2;
  margin-bottom: 20px;
}

.reading-note {
  background-color: #f5f5f5;
  padding: 20px 24px;
  margin-top: 32px;
  border-left: 3px solid #000000;
}

.reading-note p {
  font-size: 14px;
  color: #666666;
  margin-bottom: 0;
}

.reading-note p a {
  color: #000000;
  font-weight: 500;
  border-bottom: 1px solid #000000;
  padding-bottom: 1px;
  margin-right: 16px;
}

.reading-note p a:hover {
  color: #666666;
  border-bottom-color: #666666;
}

.related-block {
  border-top: 2px solid #000000;
  padding-top: 32px;
}

.related-block h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.related-desc {
  font-size: 14px;
  color: #666666;
  margin-bottom: 16px;
}

.related-title {
  font-size: 15px;
  font-weight: 500;
}

/* ==========================================================================
   Pages - 实用指南页
   ========================================================================== */

.guide-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.guide-steps h2,
.guide-faq h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid #000000;
}

.section-desc {
  font-size: 14px;
  color: #666666;
  margin-bottom: 24px;
  line-height: 1.7;
}

.steps-list {
  counter-reset: step;
}

.step-item {
  counter-increment: step;
  padding: 16px 0;
  border-bottom: 1px solid #eeeeee;
  position: relative;
  padding-left: 48px;
}

.step-item::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 20px;
  font-weight: 900;
  color: #000000;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

.step-item p a {
  color: #000000;
  border-bottom: 1px solid #000000;
  padding-bottom: 1px;
}

.step-item p a:hover {
  color: #666666;
  border-bottom-color: #666666;
}

/* FAQ 手风琴 */
.faq-item {
  border: 1px solid #eeeeee;
  margin-bottom: 12px;
  background-color: #ffffff;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: #000000;
  transition: transform 0.2s ease;
}

.faq-item[open] summary {
  background-color: #f5f5f5;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #666666;
  line-height: 1.8;
}

/* 指南配图 */
.guide-media {
  margin-bottom: 48px;
}

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

.guide-media figcaption {
  font-size: 13px;
  color: #999999;
  padding: 8px 0;
  border-bottom: 1px solid #eeeeee;
}

.related-reading h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #000000;
}

/* ==========================================================================
   Pages - 404 页面
   ========================================================================== */

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

.error-section {
  text-align: center;
  padding: 64px 24px;
  max-width: 600px;
}

.error-code {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
  color: #000000;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 32px;
}

.btn-home {
  display: inline-block;
  padding: 12px 32px;
  background-color: #000000;
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.btn-home:hover {
  background-color: #333333;
  color: #ffffff;
}

/* ==========================================================================
   Responsive - 响应式
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {
  .header-inner,
  .site-main,
  .footer-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-section {
    gap: 32px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-media img {
    height: 320px;
  }

  .page-layout {
    grid-template-columns: 1fr 280px;
    gap: 32px;
  }

  .channel-card {
    grid-template-columns: 160px 1fr;
  }
}

/* 手机 */
@media (max-width: 768px) {
  .header-inner,
  .site-main,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 页头 */
  .header-inner {
    height: 60px;
    gap: 12px;
  }

  .brand-name {
    font-size: 22px;
  }

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

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

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 3px solid #000000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

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

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

  .nav-list li a {
    padding: 14px 12px;
    border-bottom: 1px solid #eeeeee;
    font-size: 16px;
  }

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

  .nav-list li a.is-current {
    border-bottom-color: #eeeeee;
    background-color: #f5f5f5;
  }

  /* 首页 */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }

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

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

  .channel-tags {
    gap: 8px;
  }

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

  .news-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px 0;
  }

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

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

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

  .editorial-item a {
    padding: 14px 16px;
    gap: 12px;
  }

  .ed-index {
    font-size: 20px;
    min-width: 36px;
  }

  .ed-text {
    font-size: 15px;
  }

  /* 内页 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .sidebar-inner {
    position: static;
  }

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

  .breadcrumb {
    font-size: 13px;
    overflow-x: auto;
    white-space: nowrap;
  }

  /* 频道页 */
  .channel-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px;
  }

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

  /* 专题页 */
  .intro-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  /* 解读页 */
  .article-figure img {
    height: 240px;
  }

  /* 指南页 */
  .guide-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* 页脚 */
  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  /* 404 */
  .error-code {
    font-size: 80px;
  }
}

/* 小手机 */
@media (max-width: 390px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

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

  .news-item h3 {
    font-size: 15px;
  }

  .topic-card h3 {
    font-size: 16px;
  }

  .topic-card-body h3 {
    font-size: 16px;
  }

  .step-item {
    padding-left: 40px;
  }

  .step-item::before {
    font-size: 18px;
  }

  .step-item h3 {
    font-size: 16px;
  }
}

/* 滚动出现动画 - 仅作为增强，不影响初始可见性 */
@media (prefers-reduced-motion: no-preference) {
  .topic-card,
  .news-item,
  .editorial-item,
  .channel-item {
    opacity: 1;
    transform: none;
  }
}