/* ==========================================================================
   大象短剧 · 全站样式表
   版本：1.0
   说明：本文件为 weichengliandong.com 唯一样式来源，覆盖整站全部页面。
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   Base — 全局基础
   ========================================================================== */

*,
*::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, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #2b2b2b;
  background-color: #f7f4ee;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #477c8a;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #7d5a4c;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.4;
  color: #2b2b2b;
  font-weight: 700;
}

h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 0.5rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* 屏幕阅读器专用 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

/* 站点整体容器 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 页头 */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e5dfd4;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.site-brand {
  flex-shrink: 0;
}

.site-brand a {
  font-size: 1.4rem;
  font-weight: 700;
  color: #2b2b2b;
  letter-spacing: 0.02em;
}

.site-brand a:hover {
  color: #7d5a4c;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.95rem;
  color: #4a4a4a;
  border-radius: 4px;
  line-height: 1.4;
}

.site-nav .nav-list li a:hover {
  color: #7d5a4c;
  background-color: #f7f4ee;
}

.site-nav .nav-list li a.is-current {
  color: #2b2b2b;
  font-weight: 600;
  background-color: transparent;
}

/* 导航汉堡按钮，桌面隐藏 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #2b2b2b;
  border-radius: 1px;
}

/* 页脚 */
.site-footer {
  background-color: #2b2b2b;
  color: #d8d4cc;
  margin-top: auto;
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}

.footer-about .footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-about p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: #b8b3a9;
}

.footer-col .footer-heading {
  font-size: 1rem;
  color: #ffffff;
  margin-bottom: 14px;
  font-weight: 600;
}

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

.footer-col ul li a {
  color: #b8b3a9;
  font-size: 0.9rem;
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: #8f8a80;
  margin: 0;
}

/* 内页统一容器 */
.inner-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  margin-bottom: 20px;
  color: #8a857c;
}

.breadcrumb a {
  color: #477c8a;
}

.breadcrumb a:hover {
  color: #7d5a4c;
}

.breadcrumb-sep {
  color: #b5aea2;
  font-size: 0.8rem;
}

.breadcrumb-current {
  color: #6b655c;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 36px;
}

.page-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: #2b2b2b;
  margin-bottom: 12px;
  font-weight: 700;
}

.page-description {
  font-size: 1.05rem;
  color: #6b655c;
  max-width: 720px;
  line-height: 1.8;
}

/* 双栏布局：主内容 + 右侧栏 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

/* 右侧栏 */
.sidebar-area {
  min-width: 0;
}

.sidebar-card,
.side-card,
.feedback-card,
.boundary-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 24px;
  border: 1px solid #e5dfd4;
  margin-bottom: 20px;
}

.sidebar-card h2,
.side-card h2,
.feedback-card h2,
.boundary-card h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #2b2b2b;
}

.sidebar-card p,
.side-card p,
.feedback-card p,
.boundary-card p {
  font-size: 0.92rem;
  color: #6b655c;
  margin-bottom: 10px;
}

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

/* 区块标题与说明 */
.section-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.section-lead {
  color: #6b655c;
  font-size: 1rem;
  margin-bottom: 24px;
}

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.section-header p {
  color: #6b655c;
  font-size: 1rem;
  max-width: 720px;
}

/* 通用链接入口 */
.more-link {
  margin-top: 20px;
  text-align: center;
}

.more-link a {
  display: inline-block;
  color: #477c8a;
  font-weight: 600;
  padding: 6px 12px;
  border-bottom: 1px solid transparent;
}

.more-link a:hover {
  color: #7d5a4c;
  border-bottom-color: #7d5a4c;
}

/* 文本链接 */
.text-link {
  color: #477c8a;
  font-weight: 600;
  border-bottom: 1px solid rgba(71, 124, 138, 0.3);
}

.text-link:hover {
  color: #7d5a4c;
  border-bottom-color: #7d5a4c;
}

/* 按钮 */
.btn-primary,
.btn-secondary,
.btn-text,
.btn-home,
.btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background-color: #477c8a;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #3a6672;
  color: #ffffff;
}

.btn-secondary {
  background-color: #ffffff;
  color: #477c8a;
  border: 1px solid #477c8a;
}

.btn-secondary:hover {
  background-color: #f0f5f6;
  color: #3a6672;
}

.btn-text {
  background-color: transparent;
  color: #7d5a4c;
  padding: 12px 8px;
}

.btn-text:hover {
  background-color: transparent;
  color: #5f443a;
}

/* 快速核对列表 */
.quick-check-list {
  list-style: none;
}

.quick-check-list li {
  font-size: 0.92rem;
  padding: 8px 0;
  border-bottom: 1px solid #e5dfd4;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}

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

.quick-check-list li a {
  color: #477c8a;
  word-break: break-all;
}

.quick-check-list li a:hover {
  color: #7d5a4c;
}

/* 关键词标签 */
.keyword-tag {
  display: inline-block;
  background-color: #f2ede2;
  color: #7d5a4c;
  font-size: 0.8rem;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

/* 图片容器 */
figure {
  margin: 0;
}

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

figcaption {
  font-size: 0.85rem;
  color: #8a857c;
  text-align: center;
  padding: 8px 0;
  line-height: 1.5;
}

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

/* 首屏主视觉 */
.home-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1.1rem;
  color: #6b655c;
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 520px;
}

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

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #f2ede2;
  aspect-ratio: 4 / 3;
}

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

/* 频道标签条 */
.channel-tags {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
}

.channel-tags .section-title {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-block;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  color: #477c8a;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.95rem;
  line-height: 1.4;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.tag-item:hover {
  background-color: #477c8a;
  border-color: #477c8a;
  color: #ffffff;
}

/* 首页通用区块 */
.home-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* 频道地图摘要 */
.channel-summary {
  border-top: 1px solid #e5dfd4;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.summary-card {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e5dfd4;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 0;
  overflow: hidden;
  min-height: 0;
}

.summary-card img {
  width: 220px;
  height: 100%;
  object-fit: cover;
  display: block;
}

.summary-card .card-text {
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-text h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.card-text p {
  font-size: 0.92rem;
  color: #6b655c;
  margin-bottom: 10px;
  line-height: 1.7;
}

.card-text a {
  font-size: 0.9rem;
  font-weight: 600;
  color: #477c8a;
  align-self: flex-start;
}

.card-text a:hover {
  color: #7d5a4c;
}

/* 片单手册摘要 */
.list-summary {
  border-top: 1px solid #e5dfd4;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.list-intro h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.list-intro p {
  color: #6b655c;
  margin-bottom: 10px;
  max-width: 560px;
}

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

.entry-item {
  display: flex;
  flex-direction: column;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 16px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-item:hover {
  border-color: #477c8a;
}

.entry-item strong {
  font-size: 1rem;
  color: #2b2b2b;
  margin-bottom: 4px;
}

.entry-item span {
  font-size: 0.9rem;
  color: #6b655c;
  line-height: 1.6;
}

/* 名词小课窄条 */
.term-strip {
  border-top: 1px solid #e5dfd4;
}

.term-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.term-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease;
}

.term-item:hover {
  border-color: #7d5a4c;
}

.term-item strong {
  font-size: 1rem;
  color: #2b2b2b;
  margin-bottom: 4px;
}

.term-item span {
  font-size: 0.88rem;
  color: #6b655c;
  line-height: 1.6;
}

/* 开播前清单区 */
.precheck-section {
  border-top: 1px solid #e5dfd4;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.check-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  position: relative;
}

.check-num {
  display: inline-block;
  width: 28px;
  height: 28px;
  background-color: #477c8a;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 50%;
  text-align: center;
  line-height: 28px;
  margin-bottom: 12px;
}

.check-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.check-item p {
  font-size: 0.9rem;
  color: #6b655c;
  line-height: 1.7;
}

/* 疑问反馈窄带 */
.faq-strip {
  border-top: 1px solid #e5dfd4;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.faq-entry {
  background-color: #f2ede2;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.faq-entry h2 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: #2b2b2b;
}

.faq-entry p {
  font-size: 0.88rem;
  color: #6b655c;
  margin-bottom: 10px;
  flex: 1;
}

.faq-entry a {
  font-size: 0.9rem;
  font-weight: 600;
  color: #477c8a;
  align-self: flex-start;
}

.faq-entry a:hover {
  color: #7d5a4c;
}

/* ==========================================================================
   Pages — 内页通用
   ========================================================================== */

/* 内页主内容区 */
.main-content {
  min-width: 0;
}

/* ==========================================================================
   Pages — 频道地图页
   ========================================================================== */

.channel-intro-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  margin-bottom: 48px;
  align-items: center;
}

.intro-text-wrap h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.intro-text-wrap p {
  color: #6b655c;
  margin-bottom: 10px;
  line-height: 1.8;
}

.intro-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #f2ede2;
  aspect-ratio: 4 / 3;
}

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

.channel-card-list {
  margin-bottom: 48px;
}

.channel-card-list h2 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.channel-card {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 0;
  margin-bottom: 20px;
  overflow: hidden;
}

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

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

.channel-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.channel-body h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.channel-body p {
  color: #6b655c;
  margin-bottom: 8px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.channel-body .channel-fit {
  background-color: #f2ede2;
  color: #7d5a4c;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.88rem;
  align-self: flex-start;
  margin-top: 4px;
  margin-bottom: 0;
}

/* 频道关键词速查列表 */
.sidebar-card .quick-check-list li {
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.sidebar-card .quick-check-list .keyword-tag {
  margin-top: 0;
}

/* 相关片单入口 */
.related-entry-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid #e5dfd4;
}

.related-entry-section h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.related-entry-section > p {
  color: #6b655c;
  margin-bottom: 20px;
  max-width: 640px;
}

.entry-link-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.entry-link {
  display: inline-block;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 6px;
  padding: 10px 20px;
  font-weight: 600;
  color: #477c8a;
  transition: border-color 0.2s ease;
}

.entry-link:hover {
  border-color: #7d5a4c;
  color: #7d5a4c;
}

/* ==========================================================================
   Pages — 片单手册页
   ========================================================================== */

.reading-guide {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.reading-guide .section-title {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.reading-guide p {
  color: #6b655c;
  line-height: 1.8;
  margin-bottom: 10px;
  grid-column: 1;
}

.reading-guide p:first-of-type {
  grid-row: 2;
}

.reading-guide p:nth-of-type(2) {
  grid-row: 3;
}

.reading-figure {
  border-radius: 6px;
  overflow: hidden;
  background-color: #f2ede2;
  grid-column: 2;
  grid-row: 2 / 4;
  align-self: stretch;
}

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

/* 片单方向卡片 */
.playlist-section {
  margin-bottom: 48px;
}

.playlist-card-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.playlist-card {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.playlist-card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #f2ede2;
}

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

.playlist-card-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.playlist-card-content h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.playlist-card-content p {
  color: #6b655c;
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.playlist-card-content .card-note {
  background-color: #f2ede2;
  color: #7d5a4c;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.85rem;
  margin-top: auto;
  margin-bottom: 0;
  line-height: 1.5;
}

/* 开播前提示窄带 */
.watch-tip-strip {
  background-color: #f2ede2;
  border-radius: 8px;
  padding: 24px 32px;
  margin-bottom: 48px;
}

.watch-tip-strip ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
}

.watch-tip-strip ul li {
  font-size: 0.92rem;
  color: #6b655c;
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.watch-tip-strip ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: #7d5a4c;
  border-radius: 50%;
}

.watch-tip-strip > p {
  margin-top: 16px;
  text-align: center;
}

.watch-tip-strip > p a {
  font-weight: 600;
  color: #477c8a;
  border-bottom: 1px solid rgba(71, 124, 138, 0.3);
}

.watch-tip-strip > p a:hover {
  color: #7d5a4c;
}

/* 片单使用提示 */
.usage-tips {
  margin-bottom: 48px;
}

.usage-tips ol {
  padding-left: 20px;
  margin: 16px 0;
  list-style: decimal;
}

.usage-tips ol li {
  color: #6b655c;
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 6px;
  padding-left: 4px;
}

.usage-tips > p {
  color: #6b655c;
}

.usage-tips > p a {
  font-weight: 600;
}

/* 相关阅读链接 */
.related-links {
  padding-top: 32px;
  border-top: 1px solid #e5dfd4;
}

.related-links-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.related-link-card {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease;
}

.related-link-card:hover {
  border-color: #7d5a4c;
}

.related-link-name {
  font-size: 1rem;
  font-weight: 700;
  color: #477c8a;
  margin-bottom: 6px;
}

.related-link-desc {
  font-size: 0.88rem;
  color: #6b655c;
  line-height: 1.6;
}

/* ==========================================================================
   Pages — 开播前清单页
   ========================================================================== */

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

.check-section {
  margin-bottom: 48px;
  scroll-margin-top: 80px;
}

.check-section h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e5dfd4;
}

.check-section > p {
  color: #6b655c;
  margin-bottom: 16px;
  line-height: 1.8;
}

.content-media {
  border-radius: 8px;
  overflow: hidden;
  background-color: #f2ede2;
  margin-bottom: 20px;
}

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

.content-media-inline {
  aspect-ratio: 16 / 7;
}

/* 核对步骤 */
.check-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.step-card {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  gap: 14px;
}

.step-num {
  display: inline-block;
  width: 28px;
  height: 28px;
  background-color: #477c8a;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 50%;
  text-align: center;
  line-height: 28px;
  flex-shrink: 0;
}

.step-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.step-body p {
  font-size: 0.88rem;
  color: #6b655c;
  line-height: 1.7;
}

.step-body a {
  font-size: 0.85rem;
  font-weight: 600;
}

/* 标签表格 */
.tag-table-wrap {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
}

.tag-table {
  width: 100%;
  border-collapse: collapse;
}

.tag-table th {
  background-color: #f2ede2;
  color: #2b2b2b;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid #e5dfd4;
}

.tag-table td {
  padding: 12px 16px;
  font-size: 0.92rem;
  color: #4a4a4a;
  border-bottom: 1px solid #e5dfd4;
  line-height: 1.6;
}

.tag-table tbody tr:last-child td {
  border-bottom: none;
}

/* 预期管理提示 */
.expect-tips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.tip-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 16px 20px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.tip-mark {
  color: #7d5a4c;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.tip-item p {
  font-size: 0.9rem;
  color: #6b655c;
  line-height: 1.7;
}

.check-section > p:last-child {
  margin-top: 8px;
}

.check-section > p a {
  font-weight: 600;
}

/* 继续浏览 */
.continue-nav {
  background-color: #f2ede2;
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
}

.continue-nav h2 {
  font-size: 1.1rem;
  margin-bottom: 14px;
  color: #2b2b2b;
  border-bottom: none;
  padding-bottom: 0;
}

.continue-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.continue-nav ul li a {
  display: inline-block;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #477c8a;
  transition: border-color 0.2s ease;
}

.continue-nav ul li a:hover {
  border-color: #7d5a4c;
  color: #7d5a4c;
}

/* 右侧栏快速提示 */
.content-side {
  min-width: 0;
}

.side-card .quick-check-list li {
  font-size: 0.88rem;
}

.side-card .quick-check-list li::before {
  content: "·";
  color: #7d5a4c;
  font-weight: 700;
  flex-shrink: 0;
}

.side-card > p:last-child {
  margin-top: 12px;
  margin-bottom: 0;
}

.side-card > p a {
  font-weight: 600;
}

/* ==========================================================================
   Pages — 名词小课页
   ========================================================================== */

.term-lesson-nav {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.term-nav-link {
  display: inline-block;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 6px;
  padding: 10px 20px;
  font-weight: 600;
  color: #477c8a;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.term-nav-link:hover {
  border-color: #477c8a;
  background-color: #f0f5f6;
}

.lesson-shell {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.term-group {
  scroll-margin-top: 80px;
}

.term-group-title {
  font-size: 1.4rem;
  margin-bottom: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e5dfd4;
}

.term-group-intro {
  color: #6b655c;
  font-size: 0.95rem;
  margin-bottom: 20px;
  max-width: 640px;
}

/* 频道术语卡片 */
.term-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.term-card {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease;
}

.term-card:hover {
  border-color: #7d5a4c;
}

.term-name {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.term-def {
  font-size: 0.92rem;
  color: #6b655c;
  line-height: 1.7;
  margin-bottom: 10px;
}

.term-link-line {
  margin-top: auto;
}

.term-link-line a {
  font-size: 0.88rem;
  font-weight: 600;
}

/* 题材词小课 */
.theme-lesson-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.theme-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 16px;
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.theme-item img {
  width: 160px;
  height: 100px;
  object-fit: cover;
  border-radius: 4px;
}

.theme-item-text h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.theme-item-text p {
  font-size: 0.92rem;
  color: #6b655c;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 观看行为词 */
.watch-word-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.watch-word-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.watch-word-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.watch-word-item p {
  font-size: 0.92rem;
  color: #6b655c;
  line-height: 1.7;
  margin-bottom: 10px;
}

.watch-word-item .term-link-line {
  margin-top: auto;
}

/* 课程底部链接 */
.lesson-related-links {
  background-color: #f2ede2;
  border-radius: 8px;
  padding: 24px;
  margin-top: 16px;
}

.related-links-title {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.lesson-related-links p {
  color: #6b655c;
  font-size: 0.92rem;
  margin-bottom: 6px;
}

.lesson-related-links p a {
  font-weight: 600;
}

/* ==========================================================================
   Pages — 疑问反馈页
   ========================================================================== */

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

.faq-section {
  margin-bottom: 32px;
}

.section-intro {
  color: #6b655c;
  font-size: 0.95rem;
  margin-bottom: 20px;
  max-width: 640px;
}

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

.faq-item {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 0.98rem;
  font-weight: 600;
  color: #2b2b2b;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  line-height: 1.6;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: #7d5a4c;
  font-weight: 400;
  transition: transform 0.2s ease;
}

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

.faq-item summary:hover {
  color: #477c8a;
}

.faq-answer {
  padding: 0 20px 18px;
  font-size: 0.92rem;
  color: #6b655c;
  line-height: 1.8;
  border-top: 1px solid #e5dfd4;
  padding-top: 14px;
}

/* 频道归类提示区 */
.categorize-tip {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 24px;
  align-items: center;
}

.tip-content h2 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.tip-content p {
  color: #6b655c;
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.tip-content p a {
  font-weight: 600;
}

.tip-figure {
  border-radius: 6px;
  overflow: hidden;
  background-color: #f2ede2;
}

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

.tip-figure figcaption {
  font-size: 0.8rem;
  color: #8a857c;
  text-align: center;
  padding: 6px 0;
}

/* 反馈说明 */
.feedback-card {
  background-color: #ffffff;
}

.feedback-intro p {
  font-size: 0.9rem;
}

.feedback-list {
  margin: 14px 0;
}

.feedback-list li {
  padding: 6px 0;
  border-bottom: 1px solid #e5dfd4;
  font-size: 0.88rem;
  color: #6b655c;
  line-height: 1.6;
  display: flex;
  gap: 8px;
}

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

.feedback-list li strong {
  color: #2b2b2b;
  flex-shrink: 0;
}

.feedback-note {
  font-size: 0.85rem;
  color: #8a857c;
  border-top: 1px solid #e5dfd4;
  padding-top: 12px;
  margin-bottom: 0;
}

/* 收录边界卡 */
.boundary-card p:last-child {
  margin-bottom: 0;
}

/* 相关页面 */
.related-links {
  margin-top: 40px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.related-list li a {
  display: block;
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 6px;
  padding: 12px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  color: #477c8a;
  transition: border-color 0.2s ease;
}

.related-list li a:hover {
  border-color: #7d5a4c;
  color: #7d5a4c;
}

/* ==========================================================================
   Pages — 收录边界页
   ========================================================================== */

.principle-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  margin-bottom: 48px;
  align-items: center;
}

.principle-copy h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.principle-copy p {
  color: #6b655c;
  line-height: 1.8;
  margin-bottom: 10px;
}

.principle-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #f2ede2;
  aspect-ratio: 4 / 3;
}

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

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

.boundary-list-section h2 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.section-note {
  color: #6b655c;
  margin-bottom: 20px;
  max-width: 640px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-list li {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.boundary-action {
  flex-shrink: 0;
  background-color: #f2ede2;
  color: #7d5a4c;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 4px 12px;
  border-radius: 4px;
  white-space: nowrap;
}

.boundary-desc {
  font-size: 0.92rem;
  color: #4a4a4a;
  line-height: 1.7;
}

/* 信息核查建议 */
.verify-section {
  margin-bottom: 48px;
}

.verify-section h2 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.verify-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
  list-style: none;
  counter-reset: verify-counter;
}

.verify-steps li {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 20px;
  counter-increment: verify-counter;
  position: relative;
  padding-top: 56px;
}

.verify-steps li::before {
  content: counter(verify-counter);
  position: absolute;
  top: 16px;
  left: 20px;
  width: 28px;
  height: 28px;
  background-color: #477c8a;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 50%;
  text-align: center;
  line-height: 28px;
}

.verify-steps li h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.verify-steps li p {
  font-size: 0.88rem;
  color: #6b655c;
  line-height: 1.7;
  margin-bottom: 6px;
}

.verify-steps li p:last-child {
  margin-bottom: 0;
}

.verify-more {
  margin-top: 16px;
}

.verify-more a {
  font-weight: 600;
}

/* 反馈入口 */
.feedback-entry {
  background-color: #f2ede2;
  border-radius: 8px;
  padding: 32px;
  text-align: center;
}

.feedback-entry h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.feedback-entry p {
  color: #6b655c;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.feedback-entry .feedback-link {
  margin-top: 16px;
}

.feedback-entry .text-link {
  font-size: 1rem;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: calc(100vh - 300px);
}

.error-panel {
  background-color: #ffffff;
  border: 1px solid #e5dfd4;
  border-radius: 8px;
  padding: 48px 40px;
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: #7d5a4c;
  line-height: 1.2;
  margin-bottom: 8px;
}

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

.error-lead {
  font-size: 1rem;
  color: #2b2b2b;
  margin-bottom: 8px;
}

.error-text {
  color: #6b655c;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn-home {
  background-color: #477c8a;
  color: #ffffff;
}

.btn-home:hover {
  background-color: #3a6672;
  color: #ffffff;
}

.btn-link {
  background-color: transparent;
  color: #477c8a;
  border: 1px solid #477c8a;
}

.btn-link:hover {
  border-color: #7d5a4c;
  color: #7d5a4c;
}

.error-help {
  font-size: 0.85rem;
  color: #8a857c;
  margin-bottom: 0;
}

/* ==========================================================================
   Responsive — 响应式断点
   ========================================================================== */

/* 平板及以下：≤ 1024px */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .home-hero {
    padding: 40px 20px;
    gap: 32px;
  }

  .home-section {
    padding: 32px 20px;
  }

  .inner-main {
    padding: 24px 20px 48px;
  }

  .summary-card {
    grid-template-columns: 180px minmax(0, 1fr);
  }

  .summary-card img {
    width: 180px;
  }

  .channel-card {
    grid-template-columns: 220px minmax(0, 1fr);
  }

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

  .theme-item {
    grid-template-columns: 120px minmax(0, 1fr);
  }

  .theme-item img {
    width: 120px;
    height: 90px;
  }
}

/* 手机端：≤ 768px */
@media (max-width: 768px) {
  .header-inner {
    min-height: 60px;
    padding: 0 16px;
    flex-wrap: wrap;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    background-color: #ffffff;
    border-top: 1px solid #e5dfd4;
    padding: 12px 0;
    gap: 0;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .site-nav .nav-list li a.is-current {
    background-color: #f7f4ee;
  }

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

  .hero-figure {
    aspect-ratio: 16 / 10;
    order: 2;
  }

  .hero-content {
    order: 1;
  }

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

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

  .channel-tags {
    padding: 16px;
  }

  .home-section {
    padding: 32px 16px;
  }

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

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

  .summary-card img {
    width: 100%;
    height: 180px;
  }

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

  .term-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .inner-main {
    padding: 20px 16px 40px;
  }

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

  .sidebar-area,
  .content-side {
    order: 2;
  }

  .channel-intro-section {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .intro-figure {
    aspect-ratio: 16 / 9;
  }

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

  .channel-media {
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

  .reading-guide {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 16px;
  }

  .reading-guide .section-title {
    grid-column: 1;
  }

  .reading-guide p {
    grid-column: 1;
  }

  .reading-guide p:first-of-type {
    grid-row: auto;
  }

  .reading-guide p:nth-of-type(2) {
    grid-row: auto;
  }

  .reading-figure {
    grid-column: 1;
    grid-row: auto;
    aspect-ratio: 16 / 9;
    margin-top: 8px;
  }

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

  .watch-tip-strip ul {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-links-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .check-steps {
    grid-template-columns: 1fr;
  }

  .expect-tips {
    grid-template-columns: 1fr;
  }

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

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

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

  .theme-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .theme-item img {
    width: 100%;
    height: 140px;
  }

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

  .related-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .principle-section {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .principle-figure {
    aspect-ratio: 16 / 9;
  }

  .boundary-list li {
    flex-direction: column;
    gap: 8px;
  }

  .verify-steps {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 20px 24px;
  }

  .footer-col {
    padding-bottom: 8px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }
}

/* 小屏手机：≤ 520px */
@media (max-width: 520px) {
  .term-row {
    grid-template-columns: 1fr;
  }

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

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

  .entry-link-group {
    flex-direction: column;
  }

  .entry-link {
    text-align: center;
  }

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

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

  .continue-nav ul {
    flex-direction: column;
  }

  .continue-nav ul li a {
    width: 100%;
    text-align: center;
  }

  .tag-row {
    gap: 8px;
  }

  .tag-item {
    padding: 6px 12px;
    font-size: 0.88rem;
  }

  .footer-bottom p {
    font-size: 0.8rem;
  }
}