/* ==========================================================
   吃瓜网址 · 全局样式
   视觉方向：政府信息风，稳重配色，高信息密度
   ========================================================== */

/* ==========================================================
   Base · 基础变量、重置与全局元素
   ========================================================== */
:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #142c47;
  --color-primary-light: #2a4a6c;
  --color-bg: #f5f5f5;
  --color-card: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #888888;
  --color-accent: #c0392b;
  --color-border: #e0e0e0;
  --color-header-bg: #ffffff;
  --color-footer-bg: #1a3a5c;
  --color-footer-text: #d0d8e0;
  --color-footer-heading: #ffffff;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 6px 16px rgba(0, 0, 0, 0.12);
  --radius: 6px;
  --radius-lg: 8px;
  --container-width: 1200px;
  --header-height: 64px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.25s ease;
}

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

html {
  font-size: 16px;
  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);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

/* ==========================================================
   Layout · 全站统一骨架：页头、页脚、主容器、面包屑
   ========================================================== */

.site-header {
  background-color: var(--color-header-bg);
  border-bottom: 2px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  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: 24px;
}

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

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.2;
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius);
  line-height: 1.4;
}

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

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

/* 移动端汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

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

.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px 48px;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 20px 56px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 8px 0 16px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

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

/* 页标题区 */
.page-header {
  padding: 20px 0 28px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 760px;
}

/* 通用 section 标题 */
.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 760px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
  max-width: 760px;
}

/* ==========================================================
   Components · 通用组件
   ========================================================== */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(26, 58, 92, 0.3);
}

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

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

.btn-back-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid var(--color-primary);
  cursor: pointer;
  transition: background-color var(--transition);
  min-height: 44px;
}

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

/* ==========================================================
   Components · 首页 hero
   ========================================================== */

.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0 40px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

/* ==========================================================
   Components · 首页频道标签
   ========================================================== */

.channel-nav-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

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

.channel-tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

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

/* ==========================================================
   Components · 首页最新资讯列表
   ========================================================== */

.latest-news-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

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

.news-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "title date"
    "excerpt date";
  gap: 6px 24px;
  padding: 20px 24px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-primary);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}

.news-item:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

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

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

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

.news-excerpt {
  grid-area: excerpt;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.news-date {
  grid-area: date;
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
  align-self: start;
  padding-top: 4px;
}

/* ==========================================================
   Components · 首页专题卡片
   ========================================================== */

.topic-cards-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

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

.topic-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}

.topic-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

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

.topic-card-title {
  font-size: 18px;
  font-weight: 600;
  padding: 16px 20px 4px;
}

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

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

.topic-card-desc {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 0 20px 20px;
  line-height: 1.6;
}

/* ==========================================================
   Components · 首页编辑推荐
   ========================================================== */

.editor-picks-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.editor-picks {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.editor-pick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 20px 24px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}

.editor-pick:hover {
  box-shadow: var(--shadow-card-hover);
}

.pick-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.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: 1.6;
}

/* ==========================================================
   Components · 首页信息来源
   ========================================================== */

.source-info-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.source-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.source-info-item {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.info-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

/* ==========================================================
   Components · 页脚
   ========================================================== */

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 24px;
}

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

.footer-brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-footer-heading);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-footer-text);
  max-width: 480px;
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-footer-heading);
  margin-bottom: 14px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.footer-col a {
  color: var(--color-footer-text);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-footer-heading);
}

.footer-copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding-top: 16px;
}

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

.channel-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.channel-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.channel-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.channel-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.channel-card-media {
  overflow: hidden;
}

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

.channel-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.channel-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
}

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

.channel-card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  align-self: flex-start;
  padding-top: 4px;
}

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

/* 频道说明 */
.channel-notes {
  padding: 32px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow-card);
}

.notes-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.topic-summary {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-primary);
}

.topic-summary h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.topic-summary p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

.topic-summary p:last-child {
  margin-bottom: 0;
}

/* 时间线 */
.timeline-section {
  margin-bottom: 48px;
}

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

.timeline-list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 28px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-date {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  display: block;
  margin-bottom: 4px;
}

.timeline-content {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
  margin-left: 16px;
}

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

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

.timeline-figure {
  margin-top: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.timeline-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.timeline-figure figcaption {
  padding: 12px 16px;
  background-color: var(--color-card);
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
}

/* 相关资讯 */
.related-news {
  margin-bottom: 48px;
}

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

.related-news-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "title date"
    "summary date";
  gap: 4px 20px;
  padding: 16px 20px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}

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

.related-news-item a {
  grid-area: title;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
}

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

.related-news-item .news-date {
  grid-area: date;
}

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

/* 专题说明 */
.topic-note {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-accent);
}

.topic-note h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

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

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

.guide-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}

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

.guide-section {
  margin-bottom: 40px;
}

.guide-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 20px 0;
  box-shadow: var(--shadow-card);
}

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

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

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.guide-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 24px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  border-left: 3px solid var(--color-primary);
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-title::before {
  content: attr(data-step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  flex-shrink: 0;
}

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

/* 相关链接 */
.related-links {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
  margin-top: 32px;
}

.related-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

.related-list a {
  font-size: 14px;
  color: var(--color-text);
  padding: 4px 0;
}

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

/* 侧栏 */
.guide-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.sidebar-block {
  background-color: var(--color-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

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

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-list a {
  font-size: 14px;
  color: var(--color-text);
  padding: 4px 0;
  line-height: 1.5;
}

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

/* ==========================================================
   Pages · 常见问题页
   ========================================================== */

.faq-section {
  margin-bottom: 40px;
}

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

.faq-item {
  background-color: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-question {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background-color var(--transition);
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item[open] .faq-question {
  background-color: rgba(26, 58, 92, 0.04);
  color: var(--color-primary);
  font-weight: 600;
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 18px;
}

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

/* FAQ 配图 */
.faq-media {
  margin: 32px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.faq-media figcaption {
  padding: 10px 16px;
  background-color: var(--color-card);
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
}

/* FAQ 相关链接 */
.faq-related {
  margin-top: 40px;
}

.faq-related .related-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  background-color: transparent;
  box-shadow: none;
  padding: 0;
  margin-top: 0;
}

.faq-related .related-links a {
  display: block;
  padding: 14px 20px;
  background-color: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  font-size: 15px;
  color: var(--color-text);
  transition: box-shadow var(--transition), color var(--transition);
}

.faq-related .related-links a:hover {
  box-shadow: var(--shadow-card-hover);
  color: var(--color-primary);
}

/* ==========================================================
   Pages · 长尾主题文章页
   ========================================================== */

.article-body {
  max-width: 860px;
}

.article-intro {
  margin-bottom: 32px;
}

.article-intro p {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 20px 0 28px;
  box-shadow: var(--shadow-card);
}

.article-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

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

.article-section {
  margin-bottom: 36px;
}

.article-section h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-section h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin: 20px 0 10px;
}

.article-section p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 14px;
}

.article-section ul,
.article-section ol {
  margin: 12px 0 16px;
  padding-left: 24px;
}

.article-section ul {
  list-style: disc;
}

.article-section ol {
  list-style: decimal;
}

.article-section li {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

/* ==========================================================
   Pages · 404 错误页
   ========================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  background-color: var(--color-bg);
}

.error-section {
  text-align: center;
  padding: 48px 24px;
  max-width: 560px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 28px;
  line-height: 1.7;
}

/* ==========================================================
   Responsive · 响应式（断点 768px）
   ========================================================== */

@media (max-width: 992px) {
  .channel-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

  .guide-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-block {
    flex: 1;
    min-width: 240px;
  }

  .source-info-grid {
    grid-template-columns: 1fr;
  }
}

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

  .brand-slogan {
    display: none;
  }

  /* 汉堡按钮 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表收起 */
  .site-nav {
    order: 3;
    width: 100%;
  }

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

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  }

  .nav-link.is-current {
    border-left: 3px solid var(--color-primary);
  }

  /* 主容器 */
  .home-main,
  .inner-main {
    padding: 0 16px 40px;
  }

  /* 页面标题 */
  .page-header {
    padding: 16px 0 20px;
    margin-bottom: 24px;
  }

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

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

  .section-title {
    font-size: 19px;
  }

  /* hero */
  .hero-section {
    padding: 24px 0 24px;
  }

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

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

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

  /* 频道标签 */
  .channel-tags {
    gap: 8px;
  }

  .channel-tag {
    padding: 8px 16px;
    font-size: 14px;
  }

  /* 最新资讯 */
  .news-item {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "excerpt"
      "date";
    gap: 6px;
    padding: 16px;
  }

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

  .news-date {
    font-size: 12px;
  }

  /* 专题卡片 */
  .topic-card img {
    height: 160px;
  }

  .topic-card-title {
    font-size: 17px;
  }

  /* 编辑推荐 */
  .editor-pick {
    padding: 16px;
  }

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

  /* 频道卡片 */
  .channel-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .channel-card-media img {
    height: 140px;
  }

  /* 时间线 */
  .timeline-list {
    padding-left: 24px;
  }

  .timeline-marker {
    left: -24px;
    width: 18px;
    height: 18px;
  }

  .timeline-content {
    margin-left: 12px;
    padding: 14px 16px;
  }

  .timeline-content h3 {
    font-size: 15px;
  }

  .timeline-figure img {
    height: 200px;
  }

  /* 相关资讯 */
  .related-news-item {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "summary"
      "date";
    gap: 4px;
  }

  /* 指南 */
  .guide-step {
    padding: 16px;
  }

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

  .guide-figure img {
    height: 200px;
  }

  .guide-sidebar {
    flex-direction: column;
  }

  .sidebar-block {
    min-width: 0;
  }

  /* FAQ */
  .faq-question {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 14px;
  }

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

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

  /* 文章 */
  .article-figure img {
    height: 200px;
  }

  .article-section h2 {
    font-size: 18px;
  }

  .article-section h3 {
    font-size: 16px;
  }

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

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

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

  /* source info */
  .source-info-item {
    padding: 20px;
  }
}

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

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

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

  .topic-card img {
    height: 140px;
  }

  .timeline-figure img {
    height: 160px;
  }

  .guide-figure img {
    height: 160px;
  }

  .article-figure img {
    height: 160px;
  }

  .faq-media img {
    height: 140px;
  }

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

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