/* ==========================================================================
   大象传媒 · 全站样式表
   城市地图风内容导航站
   ========================================================================== */

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: #1f2d3d;
  background-color: #f7f3ec;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #132334;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e4933b;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 屏幕阅读器专用文本 */
.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
   -------------------------------------------------------------------------- */

/* 全站统一容器宽度 */
.site-header .header-inner,
.site-main,
.site-footer .footer-inner {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 页头 */
.site-header {
  background-color: #132334;
  border-bottom: 3px solid #e4933b;
  position: relative;
  z-index: 100;
}

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

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

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f7f3ec;
  letter-spacing: 0.06em;
}

.brand-tag {
  font-size: 0.78rem;
  color: #9fb3c8;
  letter-spacing: 0.04em;
}

/* 主导航 */
.site-nav {
  flex-shrink: 0;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: #c8d4df;
  border-radius: 4px;
  letter-spacing: 0.02em;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: #f7f3ec;
  background-color: rgba(91, 141, 184, 0.25);
}

.nav-list li a.is-current {
  color: #f7f3ec;
  background-color: #e4933b;
  font-weight: 600;
}

/* 移动端汉堡按钮，桌面隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: 4px;
  border: 1px solid rgba(247, 243, 236, 0.3);
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #f7f3ec;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* 页脚 */
.site-footer {
  background-color: #132334;
  color: #9fb3c8;
  margin-top: 0;
}

.footer-inner {
  padding-top: 40px;
  padding-bottom: 32px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  margin-bottom: 20px;
}

.footer-nav a {
  font-size: 0.9rem;
  color: #c8d4df;
  padding: 4px 0;
}

.footer-nav a:hover {
  color: #e4933b;
}

.footer-boundary {
  font-size: 0.85rem;
  line-height: 1.7;
  color: #7e93a8;
  border-top: 1px solid rgba(247, 243, 236, 0.12);
  padding-top: 18px;
  margin-bottom: 18px;
  max-width: 720px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  border-top: 1px solid rgba(247, 243, 236, 0.08);
  padding-top: 16px;
}

.back-top {
  font-size: 0.85rem;
  color: #c8d4df;
  padding: 6px 0;
}

.back-top:hover {
  color: #e4933b;
}

.copyright {
  font-size: 0.82rem;
  color: #7e93a8;
}

/* 主内容区 */
.site-main {
  min-height: 60vh;
  padding-top: 40px;
  padding-bottom: 64px;
}

.home-main {
  padding-top: 0;
  padding-bottom: 0;
  max-width: 100%;
}

/* 内页通用 */
.inner-main {
  background-color: transparent;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.85rem;
  color: #7e93a8;
  margin-bottom: 20px;
}

.breadcrumb a {
  color: #5b8db8;
  padding: 2px 0;
}

.breadcrumb a:hover {
  color: #e4933b;
}

.breadcrumb-sep {
  color: #b8c4cf;
  user-select: none;
}

.breadcrumb-current {
  color: #1f2d3d;
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 36px;
  border-left: 4px solid #e4933b;
  padding-left: 20px;
}

.page-description {
  font-size: 0.9rem;
  color: #5b8db8;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: #132334;
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}

.page-lead,
.page-intro {
  font-size: 1rem;
  color: #4a5a6a;
  max-width: 680px;
  line-height: 1.8;
}

/* 内页双栏布局 */
.layout-shell {
  display: flex;
  align-items: flex-start;
  gap: 40px;
}

.layout-shell .main-content {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 720px;
}

.layout-shell > .aside-label-legend,
.layout-shell > .aside-boundary {
  flex: 0 0 280px;
  max-width: 280px;
  position: sticky;
  top: 24px;
}

/* guide 页布局 */
.page-layout {
  display: flex;
  align-items: flex-start;
  gap: 40px;
}

.page-layout .main-content {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 720px;
}

.page-layout > .aside-toc {
  flex: 0 0 280px;
  max-width: 280px;
  position: sticky;
  top: 24px;
}

/* 通用区块标题 */
.section-title,
.aside-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.section-desc {
  font-size: 0.95rem;
  color: #4a5a6a;
  margin-bottom: 24px;
  max-width: 720px;
}

.section-lead {
  font-size: 0.95rem;
  color: #4a5a6a;
  margin-bottom: 20px;
  max-width: 680px;
}

/* --------------------------------------------------------------------------
   Components / 通用组件
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease,
    border-color 0.2s ease, transform 0.15s ease;
}

.btn-primary {
  background-color: #e4933b;
  color: #132334;
  border: 1px solid #e4933b;
}

.btn-primary:hover {
  background-color: #d4822a;
  border-color: #d4822a;
  color: #132334;
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: #f7f3ec;
  border: 1.5px solid rgba(247, 243, 236, 0.6);
}

.btn-outline:hover {
  border-color: #e4933b;
  color: #e4933b;
  transform: translateY(-2px);
}

/* 通用卡片圆角限制 */
.channel-card,
.route-card,
.entry-card,
.related-card,
.channel-item,
.update-item,
.detail-item {
  border-radius: 8px;
}

/* 页面级 body 类（仅业务作用域，不覆盖全局骨架） */
.page-channels .channel-map,
.page-specials .routes-grid,
.page-updates .update-list,
.page-guide .guide-section,
.page-rules .rule-summary,
.page-faq .faq-list {
  /* 业务模块由下方具体定义 */
}

/* --------------------------------------------------------------------------
   Components / 首页
   -------------------------------------------------------------------------- */

/* 首屏：内容地图 */
.hero-map {
  background-color: #132334;
  color: #f7f3ec;
  padding: 72px 0 80px;
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
}

.hero-map .hero-copy,
.hero-map .hero-figure {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.hero-map {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-copy {
  flex: 1 1 46%;
  min-width: 0;
}

.hero-figure {
  flex: 1 1 54%;
  min-width: 0;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: #e4933b;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero-copy h1 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.3;
  color: #f7f3ec;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.hero-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #c8d4df;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.hero-note {
  font-size: 0.85rem;
  color: #7e93a8;
  line-height: 1.6;
  max-width: 420px;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.hero-figure figcaption {
  font-size: 0.85rem;
  color: #9fb3c8;
  margin-top: 12px;
  line-height: 1.6;
  text-align: right;
}

/* 首页通用 section 头部 */
.section-heading {
  margin-bottom: 32px;
}

.section-kicker {
  font-size: 0.85rem;
  font-weight: 600;
  color: #e4933b;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #132334;
  line-height: 1.35;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.section-heading .section-desc {
  max-width: 680px;
}

/* 频道分类速览 */
.channel-overview {
  padding: 64px 24px;
  background-color: #f7f3ec;
}

.channel-overview .section-heading {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.channel-card {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.channel-card:hover {
  box-shadow: 0 8px 24px rgba(19, 35, 52, 0.1);
  transform: translateY(-4px);
}

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

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

.channel-card-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.channel-card-body p {
  font-size: 0.9rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 14px;
}

.channel-card-body a {
  font-size: 0.88rem;
  font-weight: 600;
  color: #5b8db8;
}

.channel-card-body a:hover {
  color: #e4933b;
}

/* 专题片单路线（首页横卡） */
.special-routes {
  padding: 64px 24px;
  background-color: #fff;
}

.special-routes .section-heading {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.route-list {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.route-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background-color: #f7f3ec;
  border: 1px solid #e3ddd2;
  padding: 24px 28px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.route-card:hover {
  border-color: #e4933b;
  box-shadow: 0 6px 20px rgba(19, 35, 52, 0.08);
}

.route-info {
  flex: 1 1 auto;
  min-width: 0;
}

.route-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: #e4933b;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.route-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.route-path {
  font-size: 0.88rem;
  color: #5b8db8;
  font-weight: 500;
  margin-bottom: 8px;
}

.route-desc {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 0;
}

.route-link {
  flex-shrink: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: #e4933b;
  border: 1px solid #e4933b;
  padding: 8px 20px;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.route-link:hover {
  background-color: #e4933b;
  color: #132334;
}

/* 观看路径提示 */
.guide-steps {
  padding: 64px 24px;
  background-color: #f7f3ec;
}

.guide-steps .section-heading {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.step-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-top: 4px solid #5b8db8;
  padding: 28px 24px;
  border-radius: 8px;
}

.step-num {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 700;
  color: #e4933b;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 10px;
}

.step-item p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 14px;
}

.step-item a {
  font-size: 0.88rem;
  font-weight: 600;
  color: #5b8db8;
}

.step-item a:hover {
  color: #e4933b;
}

/* 规则与反馈摘要 */
.rules-feedback {
  padding: 56px 24px;
  background-color: #fff;
}

.rules-feedback .section-heading {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 28px;
}

.rules-feedback .section-heading h2 {
  font-size: 1.6rem;
}

.summary-strip {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.summary-item {
  background-color: #f7f3ec;
  border-left: 4px solid #b45b4a;
  padding: 24px 28px;
  border-radius: 0 8px 8px 0;
}

.summary-feedback {
  border-left-color: #e4933b;
}

.summary-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
}

.summary-item p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 14px;
}

.summary-item a {
  font-size: 0.9rem;
  font-weight: 600;
  color: #5b8db8;
}

.summary-item a:hover {
  color: #e4933b;
}

/* 首页底部相关链接 */
.related-links {
  background-color: #132334;
  padding: 20px 24px;
}

.related-links .related-links-label,
.related-links .related-links-item {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.related-links-label {
  display: block;
  font-size: 0.85rem;
  color: #9fb3c8;
  margin-bottom: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.related-links-item {
  display: inline-block;
  font-size: 0.9rem;
  color: #c8d4df;
  margin-right: 24px;
  padding: 4px 0;
}

.related-links-item:hover {
  color: #e4933b;
}

/* --------------------------------------------------------------------------
   Components / 频道分类页
   -------------------------------------------------------------------------- */

/* 频道地图 */
.channel-map {
  margin-bottom: 48px;
}

.channel-map h2,
.channel-list h2,
.cross-special h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.map-block {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 24px 20px;
  border-radius: 8px;
  min-height: 96px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.map-block:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(19, 35, 52, 0.18);
}

.map-number {
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  margin-bottom: 4px;
}

.map-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
}

.map-block-01 {
  background-color: #2d4d6b;
}
.map-block-02 {
  background-color: #3a6285;
}
.map-block-03 {
  background-color: #5b8db8;
}
.map-block-04 {
  background-color: #7ba6c4;
}
.map-block-05 {
  background-color: #4a7a9e;
}
.map-block-06 {
  background-color: #1f3a52;
}

/* 分区说明列表 */
.channel-list {
  margin-bottom: 48px;
}

.channel-item {
  display: flex;
  gap: 24px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 20px;
  margin-bottom: 20px;
}

.channel-item-media {
  flex: 0 0 180px;
  max-width: 180px;
}

.channel-item-media img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 4px;
}

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

.channel-item-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.channel-keywords {
  font-size: 0.85rem;
  color: #e4933b;
  font-weight: 600;
  margin-bottom: 8px;
}

.channel-item-body p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 12px;
}

.channel-item-body a {
  font-size: 0.88rem;
  font-weight: 600;
  color: #5b8db8;
}

.channel-item-body a:hover {
  color: #e4933b;
}

/* 跨区片单提示 */
.cross-special {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-left: 4px solid #e4933b;
  padding: 28px;
  border-radius: 0 8px 8px 0;
}

.cross-special h2 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.cross-special p {
  font-size: 0.95rem;
  color: #4a5a6a;
  line-height: 1.8;
  margin-bottom: 10px;
}

.cross-special p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Components / 专题片单页
   -------------------------------------------------------------------------- */

.special-routes .routes-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 40px;
}

.routes-grid .route-card {
  display: flex;
  gap: 28px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 0;
  overflow: hidden;
  align-items: stretch;
}

.route-cover {
  flex: 0 0 260px;
  max-width: 260px;
  min-height: 220px;
  background-color: #e3ddd2;
}

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

.route-body {
  flex: 1 1 auto;
  padding: 28px 28px 28px 0;
  min-width: 0;
}

.route-meta {
  margin-bottom: 12px;
}

.route-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #e4933b;
  background-color: rgba(228, 147, 59, 0.1);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.route-meta h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #132334;
}

.route-desc {
  font-size: 0.95rem;
  color: #4a5a6a;
  line-height: 1.8;
  margin-bottom: 16px;
}

.route-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.route-point {
  background-color: #f7f3ec;
  border: 1px solid #e3ddd2;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: #1f2d3d;
  border-radius: 4px;
}

.route-point dt {
  font-weight: 600;
  color: #5b8db8;
  display: inline;
}

.route-point dd {
  display: inline;
}

.route-body .route-link {
  display: inline-block;
  margin-top: 4px;
}

/* 片单说明列表 */
.special-details {
  margin-bottom: 40px;
}

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

.detail-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
}

.detail-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 10px;
}

.detail-item p {
  font-size: 0.93rem;
  color: #4a5a6a;
  line-height: 1.75;
}

/* 入口核验提示 */
.route-entry-tips {
  margin-bottom: 32px;
}

.entry-tip {
  background-color: #f7f3ec;
  border-left: 4px solid #e4933b;
  padding: 16px 20px;
  margin-bottom: 14px;
  border-radius: 0 6px 6px 0;
}

.entry-tip p {
  font-size: 0.92rem;
  color: #1f2d3d;
  line-height: 1.7;
}

.entry-tip a {
  color: #5b8db8;
  font-weight: 600;
  margin: 0 4px;
}

.entry-tip a:hover {
  color: #e4933b;
}

/* 片单侧边说明 */
.route-note {
  background-color: #f7f3ec;
  border: 1px solid #e3ddd2;
  padding: 20px;
  font-size: 0.9rem;
  color: #4a5a6a;
  line-height: 1.7;
}

.route-note p {
  margin-bottom: 8px;
}

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

/* --------------------------------------------------------------------------
   Components / 更新动态页
   -------------------------------------------------------------------------- */

.update-list {
  margin-bottom: 40px;
}

.update-item {
  display: flex;
  gap: 20px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 20px;
  margin-bottom: 20px;
}

.update-thumb {
  flex: 0 0 140px;
  max-width: 140px;
}

.update-thumb img {
  width: 100%;
  height: 96px;
  object-fit: cover;
  border-radius: 4px;
}

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

.update-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.tag-new {
  background-color: rgba(91, 141, 184, 0.15);
  color: #2d4d6b;
}

.tag-adjust {
  background-color: rgba(228, 147, 59, 0.15);
  color: #b06b1f;
}

.tag-note {
  background-color: rgba(180, 91, 74, 0.12);
  color: #8f3e32;
}

.update-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.update-summary {
  font-size: 0.9rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 10px;
}

.update-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: #5b8db8;
}

.update-link:hover {
  color: #e4933b;
}

/* 侧栏标签说明 */
.aside-label-legend {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
}

.aside-title {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

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

.legend-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.legend-tag {
  flex-shrink: 0;
  margin-top: 4px;
}

.legend-text {
  font-size: 0.88rem;
  color: #4a5a6a;
  line-height: 1.6;
}

/* 相关页面入口 */
.related-entry {
  margin-top: 48px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.entry-card {
  display: block;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.entry-card:hover {
  border-color: #e4933b;
  box-shadow: 0 6px 18px rgba(19, 35, 52, 0.08);
}

.entry-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
}

.entry-desc {
  font-size: 0.88rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Components / 观看指南页
   -------------------------------------------------------------------------- */

.guide-section {
  margin-bottom: 44px;
}

.guide-section .section-title {
  font-size: 1.4rem;
  border-left: 4px solid #5b8db8;
  padding-left: 14px;
}

/* 入口核验列表 */
.verify-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.verify-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-left: 4px solid #5b8db8;
  padding: 18px 20px;
  border-radius: 0 6px 6px 0;
}

.verify-title {
  font-size: 1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.verify-item p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
}

/* 观看流程步骤 */
.step-list {
  counter-reset: watch-step;
  margin-bottom: 28px;
}

.step-list .step-item {
  position: relative;
  padding-left: 64px;
  counter-increment: watch-step;
  margin-bottom: 16px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-radius: 8px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.step-list .step-item::before {
  content: counter(watch-step);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 32px;
  height: 32px;
  background-color: #e4933b;
  color: #132334;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.step-list .step-item p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
}

/* 指南示意图 */
.guide-figure {
  margin: 28px 0;
}

.guide-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid #e3ddd2;
}

.guide-figure figcaption {
  font-size: 0.85rem;
  color: #7e93a8;
  margin-top: 10px;
  text-align: center;
}

/* 常见误判断 */
.mistake-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mistake-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-left: 4px solid #b45b4a;
  padding: 18px 20px;
  border-radius: 0 6px 6px 0;
}

.mistake-title {
  font-size: 1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.mistake-item p {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.7;
}

/* 右侧目录 */
.aside-toc {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
}

.aside-toc .aside-title {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 0.9rem;
  color: #4a5a6a;
  border-left: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease,
    background-color 0.2s ease;
}

.toc-list li a:hover {
  color: #e4933b;
  border-left-color: #e4933b;
  background-color: rgba(228, 147, 59, 0.06);
}

/* --------------------------------------------------------------------------
   Components / 内容规则页
   -------------------------------------------------------------------------- */

/* 规则摘要 */
.rule-summary {
  margin-bottom: 40px;
}

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

.rule-summary-list .summary-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-left: 4px solid #b45b4a;
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
}

.rule-tag {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: rgba(180, 91, 74, 0.12);
  color: #8f3e32;
  padding: 2px 10px;
  border-radius: 4px;
  letter-spacing: 0.04em;
  margin-top: 4px;
}

.rule-summary-list .summary-item p {
  font-size: 0.93rem;
  color: #1f2d3d;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 条款展开 */
.rule-items {
  margin-bottom: 40px;
}

.rule-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
  margin-bottom: 16px;
  border-radius: 8px;
}

.rule-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 12px;
}

.rule-reason,
.rule-example {
  font-size: 0.92rem;
  color: #4a5a6a;
  line-height: 1.75;
  margin-bottom: 10px;
}

.rule-reason strong,
.rule-example strong {
  color: #132334;
  font-weight: 600;
  margin-right: 6px;
}

.rule-example {
  background-color: #f7f3ec;
  padding: 12px 16px;
  border-radius: 4px;
  margin-bottom: 0;
}

/* 右侧边界判断 */
.aside-boundary {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
}

.aside-boundary .aside-title {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.boundary-figure {
  margin-bottom: 20px;
}

.boundary-figure img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid #e3ddd2;
}

.boundary-tip {
  background-color: #f7f3ec;
  border-left: 3px solid #5b8db8;
  padding: 14px 16px;
  margin-bottom: 14px;
  border-radius: 0 4px 4px 0;
}

.boundary-tip h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 6px;
}

.boundary-tip p {
  font-size: 0.88rem;
  color: #4a5a6a;
  line-height: 1.65;
}

.boundary-related {
  border-top: 1px solid #e3ddd2;
  padding-top: 16px;
  margin-top: 20px;
}

.boundary-related p {
  font-size: 0.88rem;
  color: #4a5a6a;
  line-height: 1.7;
}

.boundary-related a {
  color: #5b8db8;
  font-weight: 600;
  margin: 0 2px;
}

.boundary-related a:hover {
  color: #e4933b;
}

/* --------------------------------------------------------------------------
   Components / 帮助反馈页
   -------------------------------------------------------------------------- */

/* FAQ 折叠 */
.faq-section {
  margin-bottom: 48px;
}

.faq-section > h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 20px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: #fff;
  border: 1px solid #e3ddd2;
  border-radius: 8px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: #132334;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background-color 0.2s ease;
}

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

.faq-item summary:hover {
  background-color: rgba(91, 141, 184, 0.06);
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: #5b8db8;
  transition: transform 0.25s ease;
}

.faq-item[open] summary::after {
  content: "−";
  color: #e4933b;
}

.faq-answer {
  padding: 0 24px 18px;
  border-top: 1px solid #f0ece4;
  padding-top: 14px;
}

.faq-answer p {
  font-size: 0.93rem;
  color: #4a5a6a;
  line-height: 1.75;
}

/* 反馈流程 */
.feedback-section {
  display: flex;
  gap: 32px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 32px;
  border-radius: 8px;
  margin-bottom: 48px;
}

.feedback-copy {
  flex: 1 1 60%;
  min-width: 0;
}

.feedback-copy h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 10px;
}

.feedback-copy > p {
  font-size: 0.95rem;
  color: #4a5a6a;
  line-height: 1.75;
  margin-bottom: 20px;
}

.feedback-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feedback-steps li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feedback-steps li::before {
  content: attr(data-step);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background-color: #e4933b;
  color: #132334;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.feedback-steps h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 4px;
}

.feedback-steps p {
  font-size: 0.9rem;
  color: #4a5a6a;
  line-height: 1.7;
}

.feedback-figure {
  flex: 1 1 40%;
  min-width: 0;
}

.feedback-figure img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid #e3ddd2;
}

.feedback-figure figcaption {
  font-size: 0.85rem;
  color: #7e93a8;
  margin-top: 10px;
  text-align: center;
}

/* 相关入口 */
.related-links .related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto;
}

.related-card {
  display: block;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 24px;
  border-radius: 8px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-card:hover {
  border-color: #e4933b;
  box-shadow: 0 6px 18px rgba(19, 35, 52, 0.08);
}

.related-name {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 8px;
}

.related-desc {
  display: block;
  font-size: 0.88rem;
  color: #4a5a6a;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Components / 404 页
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 60px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
  background-color: #fff;
  border: 1px solid #e3ddd2;
  padding: 48px 40px;
  border-radius: 8px;
}

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: #e4933b;
  line-height: 1.2;
  margin-bottom: 12px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
}

.error-panel h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #132334;
  margin-bottom: 14px;
}

.error-desc {
  font-size: 0.95rem;
  color: #4a5a6a;
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-home {
  display: inline-block;
  background-color: #e4933b;
  color: #132334;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 6px;
  margin-bottom: 16px;
  transition: background-color 0.2s ease;
}

.error-home:hover {
  background-color: #d4822a;
  color: #132334;
}

.error-help {
  font-size: 0.85rem;
  color: #7e93a8;
  line-height: 1.6;
}

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

/* 平板及以下：≤ 900px */
@media (max-width: 900px) {
  .hero-map {
    flex-direction: column;
    gap: 32px;
    padding: 48px 0 56px;
  }

  .hero-copy,
  .hero-figure {
    max-width: 100%;
  }

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

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .layout-shell,
  .page-layout {
    flex-direction: column;
    gap: 32px;
  }

  .layout-shell .main-content,
  .page-layout .main-content {
    max-width: 100%;
  }

  .layout-shell > .aside-label-legend,
  .layout-shell > .aside-boundary,
  .page-layout > .aside-toc {
    flex: 1 1 100%;
    max-width: 100%;
    position: static;
  }

  .routes-grid .route-card {
    flex-direction: column;
  }

  .route-cover {
    flex: 1 1 auto;
    max-width: 100%;
    min-height: 0;
  }

  .route-cover img {
    height: 200px;
  }

  .route-body {
    padding: 24px;
  }

  .feedback-section {
    flex-direction: column;
  }

  .feedback-copy,
  .feedback-figure {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .entry-grid,
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 移动端：≤ 768px */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .brand-link {
    order: 1;
  }

  .nav-toggle {
    display: flex;
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    order: 3;
    flex-basis: 100%;
    flex-shrink: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid rgba(247, 243, 236, 0.1);
    margin-top: 8px;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    padding: 12px 14px;
    border-radius: 4px;
  }

  /* 汉堡按钮展开态 */
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

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

  .site-main {
    padding-top: 28px;
    padding-bottom: 40px;
  }

  .page-title {
    font-size: 1.6rem;
  }

  .hero-copy h1 {
    font-size: 1.8rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

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

  .btn {
    text-align: center;
  }

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

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

  .summary-strip {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .route-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  .route-link {
    align-self: flex-start;
  }

  .map-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .channel-item {
    flex-direction: column;
    gap: 14px;
  }

  .channel-item-media {
    flex: 1 1 auto;
    max-width: 100%;
  }

  .channel-item-media img {
    height: 160px;
  }

  .entry-grid,
  .related-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .update-item {
    flex-direction: column;
    gap: 14px;
  }

  .update-thumb {
    flex: 1 1 auto;
    max-width: 100%;
  }

  .update-thumb img {
    height: 140px;
  }

  .feedback-steps li {
    flex-direction: column;
    gap: 6px;
  }

  .feedback-steps li::before {
    margin-bottom: 4px;
  }

  .page-header {
    padding-left: 14px;
  }

  .footer-inner {
    padding-top: 32px;
    padding-bottom: 24px;
  }

  .footer-nav {
    gap: 6px 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* 小屏手机：≤ 480px */
@media (max-width: 480px) {
  .site-header .header-inner,
  .site-main,
  .site-footer .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-tag {
    display: none;
  }

  .brand-name {
    font-size: 1.3rem;
  }

  .hero-map {
    padding: 36px 0 44px;
  }

  .hero-copy h1 {
    font-size: 1.5rem;
  }

  .hero-lead {
    font-size: 0.95rem;
  }

  .channel-overview,
  .special-routes,
  .guide-steps,
  .rules-feedback {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-heading h2 {
    font-size: 1.4rem;
  }

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

  .map-block {
    min-height: 72px;
    padding: 16px;
  }

  .feedback-section {
    padding: 20px;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

  .route-points {
    flex-direction: column;
    gap: 8px;
  }

  .route-point {
    display: flex;
    flex-wrap: wrap;
  }
}