/* ============================================================
   BASE — 全局基础样式
   ============================================================ */
*, *::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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #1A1A1A;
  background-color: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #FF6B35;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e0552a;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: #1A1A1A;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1rem;
}

p {
  color: #1A1A1A;
}

time {
  color: #666666;
  font-size: 0.875rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   LAYOUT — 全站骨架
   ============================================================ */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #F5F5F5;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  flex-shrink: 0;
}

.brand a {
  display: inline-flex;
  align-items: center;
  color: #1A1A1A;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand a:hover {
  color: #FF6B35;
}

.brand-name {
  display: inline-block;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #1A1A1A;
  position: relative;
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: #1A1A1A;
  transition: transform 0.2s ease;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

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

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

.nav-list li a {
  display: inline-block;
  padding: 8px 16px;
  color: #1A1A1A;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: #FF6B35;
  background-color: #F5F5F5;
}

.nav-list li a.is-current {
  color: #FF6B35;
  background-color: rgba(255, 107, 53, 0.08);
  font-weight: 600;
}

.site-main {
  min-height: 60vh;
}

.site-footer {
  background-color: #F5F5F5;
  border-top: 1px solid #e5e5e5;
  margin-top: 64px;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1A1A1A;
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  color: #666666;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: #FF6B35;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid #e5e5e5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-bottom p {
  color: #666666;
  font-size: 0.8125rem;
}

.footer-bottom a {
  color: #666666;
  font-size: 0.8125rem;
}

.footer-bottom a:hover {
  color: #FF6B35;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
/* 公告条 */
.notice-bar {
  background-color: #1A1A1A;
  color: #FFFFFF;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
}

.notice-bar p {
  color: #FFFFFF;
  font-size: 0.875rem;
}

.notice-bar p a {
  color: #FF6B35;
  text-decoration: underline;
}

.notice-bar p a:hover {
  color: #ff8a5c;
}

.notice-close {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 1.125rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  opacity: 0.8;
  transition: opacity 0.2s ease;
}

.notice-close:hover {
  opacity: 1;
}

/* 面包屑 */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.8125rem;
  color: #666666;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb a {
  color: #666666;
}

.breadcrumb a:hover {
  color: #FF6B35;
}

.breadcrumb-sep {
  color: #999999;
  margin: 0 4px;
}

.breadcrumb-current {
  color: #1A1A1A;
  font-weight: 500;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb ol li {
  display: flex;
  align-items: center;
  gap: 4px;
}

.breadcrumb ol li + li::before {
  content: ">";
  color: #999999;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #FF6B35;
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  min-height: 44px;
}

.btn-primary:hover {
  background-color: #e0552a;
  color: #FFFFFF;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #FFFFFF;
  color: #1A1A1A;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 6px;
  border: 1px solid #e5e5e5;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
  min-height: 44px;
}

.btn-secondary:hover {
  border-color: #FF6B35;
  color: #FF6B35;
  background-color: rgba(255, 107, 53, 0.04);
}

/* 页面标题区 */
.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 24px;
  background-color: #F5F5F5;
  border-bottom: 1px solid #e5e5e5;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: #1A1A1A;
  margin-bottom: 8px;
  letter-spacing: 0;
}

.page-description {
  font-size: 0.9375rem;
  color: #666666;
  max-width: 720px;
  line-height: 1.6;
}

/* 区块标题 */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1A1A1A;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background-color: #FF6B35;
  border-radius: 2px;
  position: absolute;
  bottom: 0;
  left: 0;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 首屏 */
.hero-section {
  padding: 48px 0 40px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: #1A1A1A;
  margin-bottom: 16px;
  letter-spacing: 0;
}

.hero-lead {
  font-size: 1.0625rem;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

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

.hero-quick-entry a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background-color: #F5F5F5;
  border-radius: 6px;
  color: #1A1A1A;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease;
  min-height: 44px;
}

.hero-quick-entry a:hover {
  background-color: rgba(255, 107, 53, 0.1);
  color: #FF6B35;
}

.hero-media {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

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

/* 频道导航带 */
.channel-strip {
  padding: 40px 0;
  border-top: 1px solid #F5F5F5;
}

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

.channel-tags a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: #F5F5F5;
  border-radius: 6px;
  color: #1A1A1A;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid #F5F5F5;
  transition: all 0.2s ease;
  min-height: 44px;
}

.channel-tags a:hover {
  border-color: #FF6B35;
  color: #FF6B35;
  background-color: rgba(255, 107, 53, 0.04);
}

/* 最新资讯 */
.latest-news {
  padding: 40px 0;
}

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

.news-item {
  padding: 20px 0;
  border-bottom: 1px solid #F5F5F5;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 24px;
  align-items: start;
}

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

.news-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.news-item h3 a {
  color: #1A1A1A;
  transition: color 0.2s ease;
}

.news-item h3 a:hover {
  color: #FF6B35;
}

.news-summary {
  font-size: 0.875rem;
  color: #666666;
  line-height: 1.6;
  grid-column: 1 / -1;
  grid-row: 2;
}

.news-item time {
  font-size: 0.8125rem;
  color: #999999;
  grid-column: 2;
  grid-row: 1;
  white-space: nowrap;
  padding-top: 2px;
}

/* 专题推荐 */
.featured-topics {
  padding: 40px 0;
  background-color: #F5F5F5;
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.topic-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: #FFFFFF;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
}

.topic-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.topic-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.topic-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  padding: 16px 16px 0;
}

.topic-card h3 a {
  color: #1A1A1A;
}

.topic-card h3 a:hover {
  color: #FF6B35;
}

.topic-card p {
  font-size: 0.875rem;
  color: #666666;
  padding: 8px 16px 16px;
  line-height: 1.6;
  flex-grow: 1;
}

/* 编辑推荐 */
.editor-picks {
  padding: 40px 0;
}

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

.pick-item {
  padding: 20px 0;
  border-bottom: 1px solid #F5F5F5;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 24px;
  align-items: start;
}

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

.pick-reason {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background-color: rgba(255, 107, 53, 0.1);
  color: #FF6B35;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 4px;
  grid-column: 1;
  grid-row: 1;
  width: fit-content;
}

.pick-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  grid-column: 2;
  grid-row: 1;
}

.pick-item h3 a {
  color: #1A1A1A;
}

.pick-item h3 a:hover {
  color: #FF6B35;
}

.pick-item p {
  font-size: 0.875rem;
  color: #666666;
  grid-column: 2;
  grid-row: 2;
  line-height: 1.6;
}

/* 信息来源与反馈 */
.source-feedback {
  padding: 40px 0;
  border-top: 1px solid #F5F5F5;
}

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

.source-content p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.7;
  max-width: 720px;
}

.source-content a {
  color: #FF6B35;
  text-decoration: underline;
}

.source-content a:hover {
  color: #e0552a;
}

/* ============================================================
   PAGES — 内页通用布局
   ============================================================ */
.inner-main {
  padding-bottom: 0;
}

/* 两栏布局：主内容 + 侧栏 */
.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

.page-layout .main-content {
  min-width: 0;
  min-height: 400px;
}

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

.sidebar-card {
  background-color: #F5F5F5;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #FF6B35;
}

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

.sidebar-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.sidebar-item h3 a {
  color: #1A1A1A;
}

.sidebar-item h3 a:hover {
  color: #FF6B35;
}

.sidebar-item p {
  font-size: 0.8125rem;
  color: #666666;
  line-height: 1.5;
}

/* ============================================================
   PAGES — 频道分类页
   ============================================================ */
.channel-list-section {
  padding: 32px 0;
}

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

.channel-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  background-color: #FFFFFF;
  border: 1px solid #F5F5F5;
  border-radius: 8px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.channel-card:hover {
  border-color: #FF6B35;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.channel-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background-color: rgba(255, 107, 53, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

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

.channel-body h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.channel-body h3 a {
  color: #1A1A1A;
}

.channel-body h3 a:hover {
  color: #FF6B35;
}

.channel-body p {
  font-size: 0.875rem;
  color: #666666;
  line-height: 1.6;
}

.channel-intro-section {
  padding: 32px 0;
  border-top: 1px solid #F5F5F5;
  margin-top: 8px;
}

.channel-intro-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.channel-intro-section p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 720px;
}

.channel-figure {
  margin-top: 20px;
  border-radius: 8px;
  overflow: hidden;
  max-width: 720px;
}

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

.channel-figure figcaption {
  font-size: 0.8125rem;
  color: #666666;
  background-color: #F5F5F5;
  padding: 8px 16px;
}

/* ============================================================
   PAGES — 内容专题页
   ============================================================ */
.layout-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.topic-list-section {
  padding: 32px 0;
}

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

.topic-grid .topic-card {
  height: 100%;
}

.topic-card-body {
  padding: 0 16px 16px;
}

.topic-card-body h3 {
  padding: 0;
  margin-bottom: 6px;
}

.topic-card-body p {
  padding: 0;
  font-size: 0.875rem;
  color: #666666;
  line-height: 1.6;
}

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

.sidebar-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #FF6B35;
}

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

.tag-cloud a {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background-color: #F5F5F5;
  border-radius: 4px;
  font-size: 0.8125rem;
  color: #1A1A1A;
  transition: background-color 0.2s ease, color 0.2s ease;
  min-height: 32px;
}

.tag-cloud a:hover {
  background-color: rgba(255, 107, 53, 0.1);
  color: #FF6B35;
}

.topic-entry-section {
  padding: 32px 0;
  border-top: 1px solid #F5F5F5;
  margin-top: 8px;
}

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

.entry-link-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background-color: #F5F5F5;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.entry-link-card:hover {
  background-color: rgba(255, 107, 53, 0.06);
}

.entry-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #1A1A1A;
  transition: color 0.2s ease;
}

.entry-link-card:hover .entry-title {
  color: #FF6B35;
}

.entry-desc {
  font-size: 0.875rem;
  color: #666666;
  line-height: 1.5;
}

/* ============================================================
   PAGES — 实用指南页
   ============================================================ */
.guide-steps {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: step-counter;
}

.step-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid #F5F5F5;
  position: relative;
}

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

.step-number {
  width: 44px;
  height: 44px;
  background-color: #FF6B35;
  color: #FFFFFF;
  font-size: 1.125rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content {
  min-width: 0;
  padding-top: 4px;
}

.step-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.7;
}

.related-resources {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px 48px;
  border-top: 1px solid #F5F5F5;
}

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

.resource-card {
  background-color: #F5F5F5;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

.resource-card h3 {
  font-size: 1rem;
  font-weight: 600;
  padding: 16px 16px 0;
}

.resource-card p {
  font-size: 0.875rem;
  color: #666666;
  padding: 8px 16px 16px;
  line-height: 1.5;
  flex-grow: 1;
}

.resource-card p a {
  color: #FF6B35;
  font-weight: 500;
}

.resource-card p a:hover {
  color: #e0552a;
  text-decoration: underline;
}

/* ============================================================
   PAGES — 术语百科页
   ============================================================ */
.terms-module {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px;
}

.terms-module h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.terms-module > p {
  font-size: 0.9375rem;
  color: #666666;
  margin-bottom: 24px;
  line-height: 1.7;
}

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

.term-item {
  padding: 20px 0;
  border-bottom: 1px solid #F5F5F5;
}

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

.term-item dt {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #1A1A1A;
  margin-bottom: 6px;
}

.term-item dd {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.7;
}

.terms-figure {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  border-radius: 8px;
  overflow: hidden;
}

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

.terms-figure figcaption {
  font-size: 0.8125rem;
  color: #666666;
  background-color: #F5F5F5;
  padding: 8px 16px;
}

.related-guides {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.related-guides h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-guides > p {
  font-size: 0.9375rem;
  color: #666666;
  margin-bottom: 16px;
}

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

.related-links li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: #FF6B35;
  padding: 6px 0;
}

.related-links li a:hover {
  color: #e0552a;
  text-decoration: underline;
}

.related-links-label {
  font-size: 0.875rem;
  color: #666666;
  margin-right: 8px;
}

.related-links-item {
  font-size: 0.875rem;
  color: #FF6B35;
  padding: 4px 0;
}

.related-links-item:hover {
  color: #e0552a;
  text-decoration: underline;
}

/* ============================================================
   PAGES — FAQ页
   ============================================================ */
.faq-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px;
}

.faq-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.content-media {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 24px;
}

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

.content-media figcaption {
  font-size: 0.8125rem;
  color: #666666;
  background-color: #F5F5F5;
  padding: 8px 16px;
}

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

.faq-item {
  border: 1px solid #F5F5F5;
  border-radius: 8px;
  background-color: #FFFFFF;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: #e5e5e5;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1A1A1A;
  cursor: pointer;
  position: relative;
  padding-right: 40px;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  user-select: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: #666666;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid #F5F5F5;
}

.faq-item p {
  padding: 16px 20px;
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.7;
}

.feedback-entry {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px;
  border-top: 1px solid #F5F5F5;
}

.feedback-entry h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feedback-entry > p {
  font-size: 0.9375rem;
  color: #666666;
  margin-bottom: 16px;
  line-height: 1.7;
}

.feedback-entry ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-entry ul li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: #FF6B35;
  padding: 6px 0;
}

.feedback-entry ul li a:hover {
  color: #e0552a;
  text-decoration: underline;
}

/* ============================================================
   PAGES — 404页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

.error-panel {
  max-width: 520px;
  text-align: center;
}

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: #FF6B35;
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.9375rem;
  color: #666666;
  margin-bottom: 24px;
  line-height: 1.7;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-help {
  font-size: 0.875rem;
  color: #666666;
}

.error-help a {
  color: #FF6B35;
  text-decoration: underline;
}

.error-help a:hover {
  color: #e0552a;
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

  .topic-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #F5F5F5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    display: block;
    transform: translateY(-140%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    gap: 0;
  }

  .nav-list li a {
    display: block;
    padding: 14px 12px;
    border-radius: 6px;
    font-size: 1rem;
  }

  .nav-list.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-main {
    padding-top: 0;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 16px;
  }

  .page-header {
    padding: 24px 16px 20px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .page-description {
    font-size: 0.875rem;
  }

  .breadcrumb {
    padding: 12px 16px 0;
  }

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

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

  .hero-content h1 {
    font-size: 1.75rem;
  }

  .hero-media img {
    height: 220px;
  }

  .channel-strip {
    padding: 24px 0;
  }

  .latest-news {
    padding: 24px 0;
  }

  .featured-topics {
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .editor-picks {
    padding: 24px 0;
  }

  .source-feedback {
    padding: 24px 0;
  }

  .page-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 16px;
  }

  .page-layout .main-content {
    order: 1;
  }

  .sidebar-area {
    order: 2;
    padding-top: 24px;
  }

  .topic-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 16px;
  }

  .topic-layout .main-content {
    order: 1;
  }

  .sidebar-right {
    order: 2;
    padding-top: 24px;
  }

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

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

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

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

  .guide-steps {
    padding: 24px 16px;
  }

  .related-resources {
    padding: 24px 16px 40px;
  }

  .terms-module {
    padding: 24px 16px;
  }

  .terms-figure {
    padding: 0 16px;
  }

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

  .related-guides {
    padding: 24px 16px 40px;
  }

  .faq-section {
    padding: 24px 16px;
  }

  .feedback-entry {
    padding: 24px 16px;
  }

  .content-media img {
    height: 160px;
  }

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

  .hero-quick-entry a {
    justify-content: center;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .news-item time {
    grid-column: 1;
    grid-row: auto;
  }

  .pick-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .pick-reason {
    grid-column: 1;
    grid-row: auto;
  }

  .pick-item h3 {
    grid-column: 1;
    grid-row: auto;
  }

  .pick-item p {
    grid-column: 1;
    grid-row: auto;
  }

  .step-item {
    grid-template-columns: 44px 1fr;
    gap: 16px;
    padding: 20px 0;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    height: 60px;
  }

  .site-nav {
    top: 60px;
  }

  .brand a {
    font-size: 1.125rem;
  }

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

  .hero-actions a {
    justify-content: center;
  }

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

  .channel-tags {
    gap: 8px;
  }

  .channel-tags a {
    padding: 8px 14px;
    font-size: 0.8125rem;
  }

  .topic-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .topic-card img {
    height: 160px;
  }

  .channel-card {
    padding: 16px;
  }

  .channel-icon {
    width: 40px;
    height: 40px;
  }

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

  .tag-cloud a {
    padding: 5px 10px;
    font-size: 0.75rem;
  }

  .entry-link-card {
    padding: 16px;
  }

  .resource-card img {
    height: 120px;
  }

  .terms-figure img {
    height: 140px;
  }

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

  .faq-item summary {
    font-size: 0.875rem;
    padding: 14px 40px 14px 14px;
  }

  .faq-item p {
    font-size: 0.875rem;
    padding: 14px;
  }

  .error-code {
    font-size: 3rem;
  }

  .error-panel h1 {
    font-size: 1.25rem;
  }

  .step-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px 0;
  }

  .step-number {
    width: 32px;
    height: 32px;
    font-size: 0.9375rem;
  }
}