/* ============================================================
   91短剧 · 全站样式表
   视觉方向：酒店服务风 × 视频目录感
   配色：米白底 / 深墨绿字 / 金属铜强调 / 细线分隔
   ============================================================ */

/* ============================================================
   Base —— 重置、变量、全站基础
   ============================================================ */
:root {
  --color-bg: #F7F5F1;
  --color-surface: #FFFFFF;
  --color-text: #1F2A24;
  --color-accent: #A67C45;
  --color-accent-dark: #8B6634;
  --color-border: #E2DDD2;
  --color-label: #4F6B5E;
  --color-muted: #6B746E;
  --color-footer-bg: #1F2A24;
  --color-footer-text: #D8D4CA;

  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

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

body {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.site-error {
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

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

p {
  margin-bottom: 0;
}

.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 —— 统一容器、页头、页脚骨架
   ============================================================ */

/* ---- 页头 ---- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.brand-name {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 13px;
  color: var(--color-muted);
  font-family: var(--font-sans);
}

/* 主导航 */
.site-nav {
  display: block;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.06);
}

.nav-link.is-current {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  display: block;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
  margin-top: 2px;
}

/* 汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 80px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px var(--container-padding) 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(216, 212, 202, 0.85);
  max-width: 280px;
}

.footer-col-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(216, 212, 202, 0.85);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px var(--container-padding);
  text-align: center;
}

.footer-bottom .copyright {
  font-size: 13px;
  color: rgba(216, 212, 202, 0.6);
}

/* ---- 通用主容器 ---- */
.site-main {
  min-height: 60vh;
}

/* 首页主容器 */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* 内页主容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 0;
}

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

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 20px;
  font-family: var(--font-sans);
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
}

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

/* ---- 页面标题区 ---- */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-family: var(--font-sans);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 720px;
  line-height: 1.8;
}

/* ---- 区块标题 ---- */
.section-title {
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-desc,
.section-lead,
.section-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
  line-height: 1.8;
}

.section-kicker {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

/* ---- 文字链接 ---- */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.text-link:hover {
  color: var(--color-accent-dark);
}

.text-link::after {
  content: "→";
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.text-link:hover::after {
  transform: translateX(4px);
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-secondary:hover {
  background-color: rgba(166, 124, 69, 0.08);
  color: var(--color-accent-dark);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 10px 0;
}

.btn-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.btn-link:hover::after {
  transform: translateX(4px);
}

/* ---- 图片容器 ---- */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

figcaption {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-top: 10px;
  font-family: var(--font-sans);
}

/* ============================================================
   Components —— 侧栏布局系统
   ============================================================ */

/* 侧栏在左的布局：content-area/page-content 在主容器后半段 */
.sidebar-left {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.sidebar-left > .page-sidebar,
.sidebar-left > .faq-sidebar,
.sidebar-left > aside {
  grid-column: 1;
}

.sidebar-left > .content-area,
.sidebar-left > .page-content,
.sidebar-left > .faq-content {
  grid-column: 2;
  min-width: 0;
}

/* 当 .sidebar-left 作为祖先存在且直接子元素是 layout 容器 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.page-layout.sidebar-left > .page-sidebar {
  grid-column: 1;
  min-width: 0;
}

.page-layout.sidebar-left > .page-content {
  grid-column: 2;
  min-width: 0;
}

.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.layout-shell.sidebar-left > .page-sidebar {
  grid-column: 1;
  min-width: 0;
}

.layout-shell.sidebar-left > .content-area {
  grid-column: 2;
  min-width: 0;
}

.layout-shell.sidebar-left > .faq-sidebar {
  grid-column: 1;
  min-width: 0;
}

.layout-shell.sidebar-left > .faq-content {
  grid-column: 2;
  min-width: 0;
}

/* ---- 侧栏通用 ---- */
.page-sidebar,
.faq-sidebar {
  position: sticky;
  top: 96px;
}

.sidebar-block {
  margin-bottom: 32px;
}

.sidebar-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.sidebar-list li {
  margin-bottom: 4px;
}

.sidebar-list a {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-list a:hover {
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.05);
  border-left-color: var(--color-accent);
}

/* 侧栏卡片（playlist 页） */
.sidebar-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.sidebar-card .sidebar-title {
  border-bottom: none;
  padding-bottom: 0;
  font-size: 16px;
}

/* 侧栏关联 */
.sidebar-related {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.sidebar-subtitle {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.sidebar-links a {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-muted);
}

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

/* 侧栏锚点列表 */
.sidebar-anchor-list li {
  margin-bottom: 4px;
}

.sidebar-anchor-list a {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-anchor-list a:hover {
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.05);
  border-left-color: var(--color-accent);
}

.sidebar-link-list li {
  margin-bottom: 8px;
}

.sidebar-link-list a {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-muted);
}

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

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

.sidebar-note {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-top: 16px;
  padding: 12px;
  background-color: rgba(166, 124, 69, 0.05);
  border-radius: var(--radius-sm);
}

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

/* ---- 首屏 hero ---- */
.home-hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
  padding: 64px 0 72px;
}

.hero-copy {
  min-width: 0;
}

.hero-kicker {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

#hero-title {
  font-family: var(--font-sans);
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  max-width: 560px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}

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

.hero-figure {
  min-width: 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 30px rgba(31, 42, 36, 0.08);
}

/* 首页主视觉图下说明 */
.content-media-primary {
  margin-top: 24px;
}

.content-media-primary img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ---- 频道分类速览 ---- */
.home-channels {
  padding: 64px 0;
}

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

.section-heading h2 {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-note {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 640px;
}

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

.channel-item {
  display: flex;
  align-items: center;
  gap: 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.channel-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 36, 0.06);
}

.channel-no {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  width: 48px;
  text-align: center;
  border-right: 1px solid var(--color-border);
  padding-right: 24px;
  line-height: 1;
}

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

.channel-name {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.channel-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.channel-link {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  white-space: nowrap;
}

.channel-link::after {
  content: "→";
  margin-left: 4px;
  transition: margin-left var(--transition-fast);
}

.channel-link:hover::after {
  margin-left: 8px;
}

/* ---- 片单参考编辑说明 ---- */
.home-playlist {
  padding: 64px 0;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}

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

.playlist-main .section-kicker {
  margin-bottom: 8px;
}

.playlist-main h2 {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.playlist-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 640px;
}

.playlist-samples {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.playlist-sample {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.sample-prefix {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.08);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

.sample-body {
  min-width: 0;
}

.sample-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.sample-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.playlist-note {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.note-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.playlist-note p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.playlist-note .text-link {
  font-size: 14px;
}

/* ---- 观看前须知 ---- */
.home-before-watch {
  padding: 64px 0;
}

.home-before-watch .section-heading {
  margin-bottom: 32px;
}

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

.check-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.check-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 36, 0.06);
}

.check-no {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.check-title {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.check-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.check-link {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.check-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.check-link:hover::after {
  transform: translateX(4px);
}

/* ---- 词库与内容边界入口带 ---- */
.home-help-band {
  padding: 40px 0 0;
}

.help-band-inner {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.help-copy {
  flex: 1;
  min-width: 240px;
}

.help-copy h2 {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.help-copy p {
  font-size: 14px;
  color: var(--color-muted);
}

.help-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.help-links .text-link {
  font-size: 15px;
}

/* ============================================================
   Pages —— 频道速查 channel-guide
   ============================================================ */

.content-section {
  margin-bottom: 56px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.intro-section p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 720px;
}

.intro-section p:last-child {
  margin-bottom: 0;
}

/* ---- 对照表 ---- */
.table-wrap {
  overflow-x: auto;
  margin-bottom: 24px;
}

.guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.guide-table thead th {
  background-color: var(--color-label);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-weight: 600;
  text-align: left;
  padding: 14px 16px;
  white-space: nowrap;
}

.guide-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.7;
}

.guide-table tbody tr:nth-child(even) {
  background-color: rgba(247, 245, 241, 0.6);
}

.guide-table tbody tr:hover {
  background-color: rgba(166, 124, 69, 0.04);
}

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

.content-figure {
  margin-top: 8px;
}

.content-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ---- 频道选择三步法 ---- */
.method-list {
  counter-reset: method;
}

.method-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.method-index {
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  flex-shrink: 0;
  min-width: 48px;
}

.method-content {
  flex: 1;
  min-width: 0;
}

.method-content h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.method-content p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
}

/* ---- 频道观察点 ---- */
.observe-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.observe-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.observe-item h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-label);
}

.observe-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ---- 频道速查局限 ---- */
.limit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.limit-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.limit-item h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.limit-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ---- 关联链接 ---- */
.related-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-link {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.related-link:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 36, 0.06);
}

.related-name,
.related-link-title {
  display: block;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.related-link:hover .related-name,
.related-link:hover .related-link-title {
  color: var(--color-accent);
}

.related-desc,
.related-link-desc {
  display: block;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ============================================================
   Pages —— 专题片单 playlist
   ============================================================ */

/* 编辑说明卡片 */
.idea-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.idea-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.idea-card-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-label);
}

.idea-card-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 片单示例 */
.playlist-examples .example-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  overflow: hidden;
}

.playlist-examples .example-block:last-of-type {
  margin-bottom: 0;
}

.example-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  background-color: rgba(247, 245, 241, 0.8);
  border-bottom: 1px solid var(--color-border);
}

.example-index {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.08);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  flex-shrink: 0;
}

.example-title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
}

.example-content {
  padding: 20px 24px 24px;
}

.example-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-list li {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-label);
  background-color: rgba(79, 107, 94, 0.06);
  border: 1px solid rgba(79, 107, 94, 0.15);
  border-radius: 20px;
  padding: 4px 14px;
}

/* 使用方式 */
.usage-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.usage-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.usage-item-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.usage-item-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ============================================================
   Pages —— 观看指南 watching-guide
   ============================================================ */

.guide-intro-section p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 720px;
}

.guide-intro-section p:last-child {
  margin-bottom: 0;
}

/* ---- 步骤条 ---- */
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.step-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 36, 0.06);
}

.step-number {
  font-family: var(--font-sans);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.step-title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.step-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.step-result {
  font-size: 13px;
  color: var(--color-label);
  background-color: rgba(79, 107, 94, 0.06);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  line-height: 1.6;
  font-family: var(--font-sans);
}

.guide-media {
  margin: 32px 0;
}

.guide-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ---- 检查清单 ---- */
.checklist-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

.checklist-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
}

.checklist-content {
  flex: 1;
  min-width: 0;
}

.checklist-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.checklist-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.checklist-status {
  flex-shrink: 0;
}

.status-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-label);
  background-color: rgba(79, 107, 94, 0.08);
  border-radius: 20px;
  padding: 4px 14px;
  white-space: nowrap;
}

.status-text {
  font-size: 13px;
  color: var(--color-muted);
}

/* ---- 意外情况 ---- */
.unexpected-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

.unexpected-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.unexpected-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.unexpected-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.unexpected-item .text-link {
  font-size: 14px;
}

/* ---- 边界提示 ---- */
.boundary-note-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.boundary-note-section p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.boundary-note-section p:last-of-type {
  margin-bottom: 0;
}

.boundary-links {
  display: flex;
  gap: 24px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.boundary-links .text-link {
  font-size: 14px;
}

/* ---- 词库帮助 ---- */
.terms-help-text {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 720px;
}

.terms-help-section .btn-link {
  font-size: 15px;
}

/* ============================================================
   Pages —— 常见问题 faq
   ============================================================ */

.faq-layout {
  align-items: start;
}

/* FAQ 分类侧栏 */
.faq-category-list li {
  margin-bottom: 4px;
}

.faq-category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.faq-category-link:hover {
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.05);
  border-left-color: var(--color-accent);
}

.category-count {
  font-size: 12px;
  color: var(--color-muted);
  background-color: rgba(79, 107, 94, 0.08);
  border-radius: 10px;
  padding: 2px 8px;
}

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

.faq-section .section-title {
  font-size: 22px;
}

.content-media-inline {
  margin-bottom: 20px;
}

.content-media-inline img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

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

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-accent);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

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

.faq-answer {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

/* 未解决问题 */
.faq-more-section .section-desc {
  margin-bottom: 24px;
}

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

.more-link-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.more-link-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-label);
}

.more-link-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ============================================================
   Pages —— 短剧词库 short-drama-terms
   ============================================================ */

.terms-note {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 48px;
}

.terms-note p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
}

.terms-group-section {
  margin-bottom: 56px;
}

.terms-intro-media {
  margin-bottom: 32px;
}

.terms-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.terms-group-block {
  margin-bottom: 40px;
}

.terms-group-block .section-title {
  font-size: 22px;
}

.group-desc {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 720px;
}

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

.term-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition-fast);
}

.term-item:hover {
  border-color: var(--color-accent);
}

.term-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.term-name {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
}

.term-scene {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.08);
  border-radius: 20px;
  padding: 2px 12px;
  flex-shrink: 0;
}

.term-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.term-related {
  font-size: 13px;
  color: var(--color-label);
  font-family: var(--font-sans);
}

.term-related a {
  color: var(--color-accent);
  margin-left: 4px;
}

.term-related a:hover {
  color: var(--color-accent-dark);
}

/* 词组关系 */
.term-relation-section {
  margin-bottom: 56px;
}

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

.relation-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.relation-name {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-label);
}

.relation-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 词库边界 */
.terms-boundary-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 56px;
}

.terms-boundary-section p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.terms-boundary-section p:last-child {
  margin-bottom: 0;
}

/* 词库导航 */
.terms-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.terms-nav-list li a {
  display: block;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 18px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.terms-nav-list li a:hover {
  border-color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.04);
}

/* ============================================================
   Pages —— 内容边界 content-boundary
   ============================================================ */

.section-body p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.section-body p:last-of-type {
  margin-bottom: 0;
}

.section-body .content-figure {
  margin-top: 24px;
}

/* 收录范围 */
.scope-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.scope-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.scope-index {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
  margin-top: 4px;
  min-width: 32px;
}

.scope-text {
  flex: 1;
  min-width: 0;
}

.scope-text h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.scope-text p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 不提供边界 */
.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.boundary-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  position: relative;
  padding-left: 48px;
}

.boundary-item::before {
  content: "×";
  position: absolute;
  left: 20px;
  top: 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-sans);
}

/* 边界问答 */
.qa-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.qa-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.qa-question {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-label);
}

.qa-answer {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 频道边界备注 */
.boundary-note-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-note-list li {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  position: relative;
  padding-left: 48px;
}

.boundary-note-list li::before {
  content: "·";
  position: absolute;
  left: 20px;
  top: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-sans);
}

/* 反馈引导 */
.feedback-path-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.feedback-path-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.path-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.path-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.path-link {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.path-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.path-link:hover::after {
  transform: translateX(4px);
}

.feedback-note {
  font-size: 13px;
  color: var(--color-muted);
  background-color: rgba(166, 124, 69, 0.05);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.6;
}

/* 底部导航 */
.page-bottom-nav {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.bottom-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.bottom-nav-list li a {
  display: block;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 18px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.bottom-nav-list li a:hover {
  border-color: var(--color-accent);
  background-color: rgba(166, 124, 69, 0.04);
}

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

.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--container-padding);
}

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

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

.error-title {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

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

.error-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  background-color: var(--color-accent);
  color: #FFFFFF;
  transition: background-color var(--transition-fast);
}

.error-link:hover {
  background-color: var(--color-accent-dark);
  color: #FFFFFF;
}

/* ============================================================
   Responsive —— 响应式
   ============================================================ */

/* ---- 1080px ---- */
@media (max-width: 1080px) {
  .home-hero {
    gap: 40px;
    padding: 48px 0 56px;
  }

  #hero-title {
    font-size: 36px;
  }

  .home-playlist {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .playlist-note {
    max-width: 640px;
  }

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

  .check-item {
    padding: 20px;
  }

  .observe-list,
  .limit-grid,
  .related-links,
  .idea-grid,
  .unexpected-list,
  .relation-list,
  .feedback-path-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .usage-list,
  .more-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .step-card {
    padding: 20px;
  }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
  }
}

/* ---- 768px ---- */
@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }

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

  .brand-tag {
    display: none;
  }

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

  /* 导航收起 */
  .site-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(31, 42, 36, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    z-index: 99;
  }

  .nav-toggle[aria-expanded="true"] + .site-nav,
  .site-nav.nav-open {
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }

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

  .nav-item {
    border-bottom: 1px solid var(--color-border);
  }

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

  .nav-link {
    padding: 12px 8px;
    font-size: 16px;
  }

  .nav-link.is-current::after {
    display: none;
  }

  .nav-link.is-current {
    background-color: rgba(166, 124, 69, 0.06);
  }

  /* 汉堡动画 */
  .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);
  }

  /* 首页 hero 改单列 */
  .home-hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0 48px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-figure {
    order: 2;
  }

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

  .hero-lead {
    font-size: 16px;
  }

  /* 首页分区间距 */
  .home-channels,
  .home-playlist,
  .home-before-watch {
    padding: 40px 0;
  }

  .channel-item {
    padding: 20px;
    gap: 16px;
    flex-wrap: wrap;
  }

  .channel-no {
    width: 40px;
    font-size: 18px;
    padding-right: 16px;
  }

  .channel-link {
    margin-left: 56px;
  }

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

  .help-band-inner {
    padding: 24px;
  }

  /* 内页侧栏布局改单列 */
  .sidebar-left,
  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .sidebar-left > .page-sidebar,
  .sidebar-left > .faq-sidebar,
  .sidebar-left > aside,
  .page-layout.sidebar-left > .page-sidebar,
  .layout-shell.sidebar-left > .page-sidebar,
  .layout-shell.sidebar-left > .faq-sidebar {
    grid-column: 1;
    position: static;
    order: 2;
  }

  .sidebar-left > .content-area,
  .sidebar-left > .page-content,
  .sidebar-left > .faq-content,
  .page-layout.sidebar-left > .page-content,
  .layout-shell.sidebar-left > .content-area,
  .layout-shell.sidebar-left > .faq-content {
    grid-column: 1;
    order: 1;
  }

  /* 侧栏横向滚动标签 */
  .sidebar-list,
  .sidebar-anchor-list,
  .faq-category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .sidebar-list li,
  .sidebar-anchor-list li,
  .faq-category-list li {
    margin-bottom: 0;
  }

  .sidebar-list a,
  .sidebar-anchor-list a,
  .faq-category-link {
    border-left: none;
    border: 1px solid var(--color-border);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
  }

  .sidebar-card {
    padding: 16px;
  }

  .sidebar-block {
    margin-bottom: 16px;
  }

  .sidebar-related {
    margin-top: 16px;
  }

  /* 内页标题区 */
  .page-header {
    margin-bottom: 32px;
  }

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

  .inner-main {
    padding-top: 24px;
  }

  /* 多列模块统一改单列/双列 */
  .observe-list,
  .limit-grid,
  .related-links,
  .idea-grid,
  .unexpected-list,
  .relation-list,
  .feedback-path-list {
    grid-template-columns: 1fr;
  }

  .usage-list,
  .more-links {
    grid-template-columns: 1fr;
  }

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

  .step-card {
    padding: 24px;
  }

  /* 表格移动端 */
  .table-wrap {
    margin: 0 -16px;
    padding: 0 16px;
  }

  .guide-table {
    min-width: 560px;
  }

  .guide-table thead th {
    padding: 12px;
  }

  .guide-table tbody td {
    padding: 12px;
  }

  /* 检查清单 */
  .checklist-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
  }

  .checklist-status {
    align-self: flex-start;
  }

  /* 词库 */
  .term-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  /* 内容边界 */
  .scope-item {
    padding: 16px;
  }

  .boundary-item,
  .boundary-note-list li {
    padding-left: 40px;
  }

  .boundary-item::before,
  .boundary-note-list li::before {
    left: 16px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 40px var(--container-padding) 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-brand-desc {
    max-width: 100%;
  }
}

/* ---- 480px ---- */
@media (max-width: 480px) {
  :root {
    --container-padding: 16px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .home-main,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

  .btn {
    width: 100%;
  }

  .channel-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
  }

  .channel-no {
    width: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0;
    padding-bottom: 8px;
    text-align: left;
  }

  .channel-link {
    margin-left: 0;
  }

  .playlist-sample {
    flex-direction: column;
    gap: 12px;
  }

  .sample-prefix {
    align-self: flex-start;
  }

  .help-band-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
  }

  .help-links {
    gap: 16px;
  }

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

  .footer-brand {
    grid-column: 1;
  }

  .footer-bottom {
    padding: 16px;
  }

  .method-item {
    flex-direction: column;
    gap: 8px;
  }

  .method-index {
    min-width: auto;
  }

  .example-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 14px;
  }

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

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

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

/* ============================================================
   Motion & Accessibility
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}