/* ============================================================
   BASE — 全局基础样式
   ============================================================ */

:root {
  --color-cream: #FFF8E7;
  --color-orange: #F25C3A;
  --color-teal: #0A6E62;
  --color-yellow: #F7B32B;
  --color-ink: #1E293B;
  --color-mint: #E6F4F0;
  --color-white: #FFFFFF;
  --color-gray: #64748B;
  --color-light-gray: #F1F5F9;
  --color-border: #E2E8F0;

  --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1180px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;
}

*,
*::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: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-cream);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-teal);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-ink);
}

p {
  line-height: 1.6;
}

strong {
  font-weight: 700;
}

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

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

.home-main {
  width: 100%;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ============================================================
   COMPONENTS — 页头与导航
   ============================================================ */

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand-name::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-pill);
  background-color: var(--color-orange);
  margin-right: 8px;
  vertical-align: middle;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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-nav {
  display: block;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-list li {
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  border-radius: var(--radius-pill);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list a:hover {
  background-color: var(--color-mint);
  color: var(--color-teal);
}

.nav-list a.is-current {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   COMPONENTS — 面包屑
   ============================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 12px;
  font-size: 14px;
  color: var(--color-gray);
}

.breadcrumb a {
  color: var(--color-teal);
  font-weight: 500;
}

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

.breadcrumb-sep {
  color: var(--color-gray);
  opacity: 0.6;
}

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

/* ============================================================
   COMPONENTS — 页面标题区
   ============================================================ */

.page-header {
  padding: 24px 0 32px;
  border-bottom: 2px solid var(--color-mint);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 12px;
  line-height: 1.2;
}

.page-description {
  font-size: 16px;
  color: var(--color-gray);
  max-width: 720px;
}

/* ============================================================
   COMPONENTS — 区块标题
   ============================================================ */

.section-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 16px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background-color: var(--color-orange);
}

.section-desc {
  color: var(--color-gray);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 720px;
}

/* ============================================================
   COMPONENTS — 首页 Hero
   ============================================================ */

.hero-section {
  background-color: var(--color-cream);
  padding: 48px 24px 32px;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-ink);
  line-height: 1.2;
  margin-bottom: 8px;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.7;
  max-width: 480px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  min-height: 44px;
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--color-orange);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #e04e2e;
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-teal);
  border: 2px solid var(--color-teal);
}

.btn-secondary:hover {
  background-color: var(--color-mint);
  color: var(--color-teal);
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(30, 41, 59, 0.12);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.hero-tags {
  max-width: var(--container-width);
  margin: 32px auto 0;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.tag {
  display: inline-block;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-teal);
}

/* ============================================================
   COMPONENTS — 首页通用区块
   ============================================================ */

.home-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px;
}

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

.section-head h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.section-head p {
  color: var(--color-gray);
  font-size: 15px;
  max-width: 640px;
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  color: var(--color-teal);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-teal);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.section-link::after {
  content: "→";
  font-size: 16px;
}

.section-link:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   COMPONENTS — 首页频道区块
   ============================================================ */

.channel-section {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  margin: 0 auto 40px;
}

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

.channel-item {
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-orange);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.channel-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.08);
}

.channel-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.channel-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   COMPONENTS — 首页专题区块
   ============================================================ */

.topic-section {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  margin: 0 auto 40px;
}

.topic-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.topic-tag {
  display: inline-block;
  background-color: var(--color-mint);
  color: var(--color-teal);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
}

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

.topic-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-light-gray);
  border-radius: var(--radius-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.topic-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.08);
}

.topic-figure {
  flex: 0 0 120px;
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.topic-figure img {
  width: 120px;
  height: 90px;
  object-fit: cover;
}

.topic-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.topic-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.topic-info p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.5;
}

/* ============================================================
   COMPONENTS — 首页内容解读区块
   ============================================================ */

.insight-section {
  background-color: var(--color-mint);
  border-radius: var(--radius-lg);
  margin: 0 auto 40px;
}

.insight-summary {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 24px;
  border-left: 4px solid var(--color-yellow);
}

.insight-summary p {
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.7;
}

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

.insight-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
}

.insight-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 8px;
}

.insight-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.insight-mistake {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-ink);
  border-left: 4px solid var(--color-orange);
}

.insight-mistake strong {
  color: var(--color-orange);
  margin-right: 8px;
}

/* ============================================================
   COMPONENTS — 首页观看指南区块
   ============================================================ */

.guide-section {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  margin: 0 auto 40px;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.guide-step {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  text-align: left;
}

.guide-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-orange);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
}

.guide-step h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.guide-step p {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.5;
}

/* ============================================================
   COMPONENTS — 首页内容原则区块
   ============================================================ */

.principle-section {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  margin: 0 auto 40px;
}

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

.principle-item {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 24px;
  border-top: 4px solid var(--color-teal);
}

.principle-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-teal);
}

.principle-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   COMPONENTS — 首页相关链接
   ============================================================ */

.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.related-links-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-block;
  margin-right: 12px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-teal);
  padding: 6px 14px;
  background-color: var(--color-mint);
  border-radius: var(--radius-pill);
}

.related-links-item:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   COMPONENTS — 页脚
   ============================================================ */

.site-footer {
  background-color: var(--color-ink);
  color: var(--color-cream);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-cream);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 248, 231, 0.2);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  list-style: none;
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255, 248, 231, 0.8);
  font-size: 14px;
}

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

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid rgba(255, 248, 231, 0.15);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 248, 231, 0.6);
  line-height: 1.6;
}

/* ============================================================
   PAGES — 频道导览页
   ============================================================ */

.channel-index {
  margin-bottom: 48px;
}

.channel-anchor-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.channel-anchor {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.channel-anchor:hover {
  border-color: var(--color-teal);
  box-shadow: 0 4px 12px rgba(10, 110, 98, 0.1);
}

.channel-anchor-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-teal);
}

.channel-anchor-desc {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.5;
}

.channel-detail-section {
  margin-bottom: 48px;
}

.channel-detail-block {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border-left: 4px solid var(--color-teal);
}

.channel-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 20px;
}

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

.channel-meta p {
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.6;
  min-width: 0;
}

.channel-meta strong {
  display: block;
  font-size: 13px;
  color: var(--color-teal);
  margin-bottom: 4px;
  font-weight: 700;
}

.channel-boundary {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border-left: 3px solid var(--color-yellow);
}

.channel-boundary h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.channel-boundary p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.browse-tips {
  margin-bottom: 48px;
}

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

.tip-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border-top: 3px solid var(--color-orange);
}

.tip-item h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.tip-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.page-media {
  margin: 32px 0 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-media figcaption {
  background-color: var(--color-white);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  text-align: center;
}

.inner-page-links {
  margin-bottom: 48px;
  background-color: var(--color-mint);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.inner-page-links p {
  font-size: 14px;
  color: var(--color-ink);
  line-height: 1.8;
}

.inner-page-links a {
  display: inline-block;
  margin-right: 16px;
  color: var(--color-teal);
  font-weight: 600;
}

/* ============================================================
   PAGES — 专题片单页
   ============================================================ */

.topic-tags {
  margin-bottom: 32px;
}

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

.tag-item {
  display: inline-block;
  background-color: var(--color-mint);
  color: var(--color-teal);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag-item:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

.featured-playlist {
  margin-bottom: 40px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border-bottom: 3px solid var(--color-border);
}

.playlist-media {
  margin: 0;
}

.playlist-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.playlist-content {
  padding: 28px;
}

.playlist-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.playlist-focus {
  font-size: 15px;
  color: var(--color-teal);
  margin-bottom: 8px;
}

.playlist-focus strong {
  color: var(--color-orange);
  margin-right: 6px;
}

.playlist-desc {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.playlist-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-teal);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  border: 1px solid var(--color-teal);
  border-radius: var(--radius-pill);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.playlist-link a::after {
  content: "→";
}

.playlist-link a:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

.curation-notes {
  margin-bottom: 48px;
}

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

.note-item {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 20px;
}

.note-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 8px;
}

.note-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.curation-more {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-gray);
}

.curation-more a {
  color: var(--color-teal);
  font-weight: 600;
  margin-right: 16px;
}

/* ============================================================
   PAGES — 内容解读页
   ============================================================ */

.conclusion-summary {
  margin-bottom: 40px;
}

.summary-banner {
  background-color: var(--color-mint);
  border-radius: var(--radius-lg);
  padding: 28px;
  border-left: 6px solid var(--color-yellow);
}

.summary-text {
  font-size: 16px;
  color: var(--color-ink);
  line-height: 1.8;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.principle-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
}

.principle-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 8px;
}

.principle-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

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

.example-figure {
  margin: 0 0 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.example-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.example-figure figcaption {
  background-color: var(--color-white);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  text-align: center;
}

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

.example-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.example-scene {
  padding: 20px;
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
}

.example-scene h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-orange);
  margin-bottom: 6px;
}

.example-scene p {
  font-size: 14px;
  color: var(--color-ink);
  line-height: 1.6;
}

.example-reading {
  padding: 20px;
}

.example-reading h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 6px;
}

.example-reading p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

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

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

.misconception-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border-left: 3px solid var(--color-orange);
}

.misconception-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.misconception-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
  margin-bottom: 6px;
}

.misconception-item p:last-child {
  margin-bottom: 0;
}

.misconception-item strong {
  color: var(--color-teal);
}

.related-inner {
  background-color: var(--color-mint);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 48px;
}

.related-inner p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.related-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-list li {
  list-style: none;
}

.related-list a {
  display: inline-block;
  background-color: var(--color-white);
  color: var(--color-teal);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-list a:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   PAGES — 观看指南页
   ============================================================ */

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

.task-intro {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
}

.task-intro p {
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 720px;
}

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

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

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

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

.step-number {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-orange);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 18px;
  font-weight: 800;
}

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

.step-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.step-body p {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.6;
  max-width: 640px;
}

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

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

.result-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border-top: 3px solid var(--color-teal);
}

.result-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 8px;
}

.result-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.guide-figure {
  margin: 0 0 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.guide-figure figcaption {
  background-color: var(--color-white);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  text-align: center;
}

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

.limits-list {
  list-style: none;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
}

.limits-list li {
  list-style: none;
  padding: 12px 0;
  padding-left: 28px;
  position: relative;
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.6;
  border-bottom: 1px solid var(--color-light-gray);
}

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

.limits-list li::before {
  content: "·";
  position: absolute;
  left: 8px;
  color: var(--color-orange);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  top: 14px;
}

.guide-links {
  margin-bottom: 48px;
  background-color: var(--color-mint);
  border-radius: var(--radius-md);
  padding: 24px;
}

.guide-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-links li {
  list-style: none;
}

.guide-links a {
  display: inline-block;
  background-color: var(--color-white);
  color: var(--color-teal);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.guide-links a:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   PAGES — 常见问题页
   ============================================================ */

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

.faq-structure-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-structure-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.faq-structure-figure figcaption {
  background-color: var(--color-white);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  text-align: center;
}

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

.faq-group-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 20px;
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

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

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 700;
  color: var(--color-teal);
  transition: transform 0.2s ease;
}

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

.faq-item summary:hover {
  background-color: var(--color-cream);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

.faq-fallback {
  margin-bottom: 48px;
  background-color: var(--color-mint);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.faq-fallback p {
  font-size: 15px;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.fallback-steps {
  list-style: none;
  counter-reset: fallback-step;
}

.fallback-steps li {
  list-style: none;
  counter-increment: fallback-step;
  font-size: 14px;
  color: var(--color-gray);
  padding: 8px 0 8px 36px;
  position: relative;
  line-height: 1.6;
}

.fallback-steps li::before {
  content: counter(fallback-step);
  position: absolute;
  left: 0;
  top: 8px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-teal);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
}

.fallback-steps a {
  color: var(--color-teal);
  font-weight: 600;
}

/* ============================================================
   PAGES — 内容原则页
   ============================================================ */

.principle-summary {
  margin-bottom: 40px;
}

.principle-summary > p {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  font-size: 16px;
  color: var(--color-ink);
  line-height: 1.8;
  border-left: 4px solid var(--color-teal);
}

.principle-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.principle-col {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  min-width: 0;
}

.principle-col .principle-list {
  list-style: none;
  display: block;
}

.principle-col .principle-list li {
  list-style: none;
  padding: 10px 0;
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--color-ink);
  line-height: 1.6;
  border-bottom: 1px solid var(--color-light-gray);
  min-width: 0;
}

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

.principle-col .principle-list li::before {
  content: "·";
  position: absolute;
  left: 6px;
  color: var(--color-orange);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  top: 12px;
}

.content-structure {
  margin-bottom: 40px;
}

.structure-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.structure-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.structure-figure figcaption {
  background-color: var(--color-white);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  text-align: center;
}

.related-links {
  background-color: var(--color-mint);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 48px;
}

.related-links p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.related-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li {
  list-style: none;
}

.related-links ul a {
  display: inline-block;
  background-color: var(--color-white);
  color: var(--color-teal);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links ul a:hover {
  background-color: var(--color-teal);
  color: var(--color-white);
}

/* ============================================================
   PAGES — 404 页面
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  min-height: 60vh;
}

.error-panel {
  text-align: center;
  max-width: 520px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: 0 8px 24px rgba(30, 41, 59, 0.08);
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 24px;
  line-height: 1.7;
}

.error-btn {
  display: inline-block;
  background-color: var(--color-teal);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: var(--color-orange);
  color: var(--color-white);
}

.error-help {
  font-size: 14px;
  color: var(--color-gray);
}

.error-help a {
  color: var(--color-teal);
  font-weight: 600;
  margin: 0 8px;
}

/* ============================================================
   RESPONSIVE — 960px 断点
   ============================================================ */

@media (max-width: 960px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

/* ============================================================
   RESPONSIVE — 640px 断点
   ============================================================ */

@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 2px solid var(--color-mint);
    box-shadow: 0 8px 16px rgba(30, 41, 59, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    padding: 8px 16px 16px;
    gap: 0;
  }

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

  .nav-list a {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }

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

  .breadcrumb {
    padding: 16px 0 8px;
    font-size: 13px;
  }

  .page-header {
    padding: 16px 0 24px;
    margin-bottom: 24px;
  }

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

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

  .hero-section {
    padding: 32px 16px 24px;
  }

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

  .hero-desc {
    font-size: 15px;
  }

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

  .btn {
    width: 100%;
  }

  .hero-tags {
    gap: 8px;
  }

  .tag {
    font-size: 12px;
    padding: 6px 14px;
  }

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

  .section-head h2 {
    font-size: 22px;
  }

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

  .topic-item {
    flex-direction: column;
  }

  .topic-figure {
    flex: none;
  }

  .topic-figure img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
  }

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

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

  .footer-bottom {
    padding: 16px;
  }

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

  .channel-detail-block {
    padding: 20px;
  }

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

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

  .playlist-content {
    padding: 20px;
  }

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

  .summary-banner {
    padding: 20px;
  }

  .step-item {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .step-number {
    flex: none;
  }

  .guide-figure img,
  .page-media img,
  .example-figure img,
  .faq-structure-figure img,
  .structure-figure img,
  .playlist-media img {
    aspect-ratio: 4 / 3;
  }

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

  .faq-item p {
    padding: 0 16px 14px;
    font-size: 14px;
  }

  .faq-fallback {
    padding: 20px;
  }

  .principle-columns {
    gap: 16px;
  }

  .principle-col {
    padding: 20px;
  }

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

  .error-code {
    font-size: 48px;
  }

  .related-links {
    padding: 20px;
  }
}

/* ============================================================
   RESPONSIVE — 打印样式
   ============================================================ */

@media print {
  .site-header,
  .nav-toggle,
  .site-nav,
  .breadcrumb,
  .hero-actions,
  .footer-bottom {
    display: none !important;
  }

  .site-main {
    padding: 0;
  }

  .inner-main {
    max-width: 100%;
    padding: 0;
  }

  body {
    background-color: var(--color-white);
  }

  .hero-section,
  .home-section,
  .channel-section,
  .topic-section,
  .insight-section,
  .guide-section,
  .principle-section {
    background-color: var(--color-white);
    border-radius: 0;
    padding: 16px 0;
  }

  a {
    color: var(--color-ink);
  }

  img {
    max-width: 100%;
  }
}