/* ==========================================================================
   九九影院6090剧场 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与全局基线
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #f5f7f8;
  --color-surface: #ffffff;
  --color-text: #1f2a2e;
  --color-text-muted: #5b6a70;
  --color-accent: #1f9d8f;
  --color-accent-dark: #17786d;
  --color-accent-soft: #e6f4f2;
  --color-line: #dfe5e7;
  --color-footer-bg: #16211f;
  --color-footer-text: #d8e2e0;
  --color-footer-line: #2c3a37;

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --container: 1180px;
  --radius-card: 6px;
  --radius-btn: 6px;

  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 56px;
  --space-2xl: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-stack);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

figcaption {
  margin-top: var(--space-xs);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   layout · 骨架：页头 / 主导航 / 主容器 / 面包屑 / 页标题 / 页脚
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--color-text);
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-card);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0;
}

.brand-slogan {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
}

.site-nav {
  flex: 0 1 auto;
}

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

.nav-list > li {
  display: flex;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-line);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-btn);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px var(--space-2xl);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-accent-dark);
}

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

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

.page-header {
  padding: 12px 0 28px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
}

.page-description {
  max-width: 76ch;
  margin-top: var(--space-sm);
  font-size: 1rem;
  color: var(--color-text-muted);
}

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

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) 2.6fr;
  gap: var(--space-lg) var(--space-xl);
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-xl) 24px var(--space-lg);
}

.footer-brand-name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #ffffff;
}

.footer-brand-desc {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-footer-text);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-md);
}

.footer-group-title {
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-group a {
  display: inline-block;
  padding: 4px 0;
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.footer-group a:hover,
.footer-group a:focus-visible {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-md) 24px var(--space-lg);
  border-top: 1px solid var(--color-footer-line);
  font-size: 0.8125rem;
  color: var(--color-footer-text);
}

.footer-copy {
  color: var(--color-footer-text);
}

.clear-history {
  padding: 6px 12px;
  background-color: transparent;
  border: 1px solid var(--color-footer-line);
  border-radius: var(--radius-btn);
  color: var(--color-footer-text);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.clear-history:hover,
.clear-history:focus-visible {
  border-color: var(--color-accent);
  color: #ffffff;
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 50%;
  color: var(--color-accent-dark);
  font-size: 1rem;
  cursor: pointer;
}

.back-to-top.is-visible {
  display: inline-flex;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   components · 通用区块、按钮、卡片、清单、时间线、表格、FAQ
   -------------------------------------------------------------------------- */
.section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-line);
}

.content-section {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-line);
}

.section-head {
  max-width: 76ch;
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: 1.375rem;
  font-weight: 600;
}

.section-desc,
.section-intro {
  margin-top: var(--space-xs);
  max-width: 76ch;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.section-intro {
  margin-bottom: var(--space-lg);
}

.section-foot,
.section-note {
  margin-top: var(--space-lg);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.section-note a,
.section-foot a {
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-line);
  color: var(--color-text);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

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

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* 卡片基座 */
.channel-card,
.topic-card,
.type-card,
.structure-item,
.advice-item,
.scope-item,
.exclude-item,
.feedback-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.card-scope {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.card-tag,
.card-structure {
  margin-top: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.card-link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

/* 图片容器统一约束 */
.hero-media,
.content-media,
.channel-group-figure,
.topic-media,
.section-figure,
.section-media {
  overflow: hidden;
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
}

.hero-media img,
.content-media img,
.channel-group-figure img,
.topic-media img,
.section-figure img,
.section-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 步骤清单基座（各页作用域限定） */
.step-list {
  display: grid;
  gap: var(--space-md);
}

.step-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.step-title {
  font-size: 1rem;
  font-weight: 600;
}

/* 时间线基座 */
.timeline-list {
  display: grid;
  gap: 0;
  border-left: 2px solid var(--color-line);
  padding-left: var(--space-md);
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(96px, 140px) minmax(0, 1fr);
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-line);
}

.timeline-item:last-child {
  border-bottom: 0;
}

.timeline-date {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-dark);
}

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

.timeline-type {
  font-size: 1rem;
  font-weight: 600;
}

.timeline-scope,
.timeline-note {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* 折叠问答 */
.faq-list {
  display: grid;
  gap: var(--space-sm);
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  min-height: 44px;
  padding: 14px var(--space-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "＋";
  flex: 0 0 auto;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent-dark);
}

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

.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* 字段表格 */
.field-table {
  font-size: 0.9375rem;
}

.field-table-caption {
  padding-bottom: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: left;
}

.field-table th,
.field-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

.field-table thead th {
  background-color: #eef3f3;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.field-table tbody th {
  font-weight: 600;
  color: var(--color-text);
}

.field-table tbody td {
  color: var(--color-text-muted);
}

/* 设备适配表（guide） */
.device-table {
  display: grid;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-surface);
}

.device-row {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) minmax(0, 2fr);
  border-bottom: 1px solid var(--color-line);
}

.device-row:last-child {
  border-bottom: 0;
}

.device-row-head {
  background-color: #eef3f3;
  font-weight: 600;
}

.device-cell {
  padding: 12px 14px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.device-row-head .device-cell {
  color: var(--color-text);
  font-size: 0.875rem;
}

/* 滚动淡入增强（不影响初始可见性） */
.reveal-ready .reveal {
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal-ready .reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal-ready .reveal:not(.is-in) {
  opacity: 0.999;
  transform: none;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main {
  display: block;
}

.hero-section {
  padding: var(--space-xl) 0 var(--space-lg);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--space-xl);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

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

.hero-eyebrow {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  font-size: 0.8125rem;
  color: var(--color-accent-dark);
}

.hero-title {
  margin-top: var(--space-md);
  font-size: 1.875rem;
  font-weight: 600;
}

.hero-desc {
  margin-top: var(--space-md);
  max-width: 60ch;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.hero-facts {
  display: grid;
  gap: 6px;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-line);
}

.hero-facts li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.hero-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.hero-media img {
  aspect-ratio: 4 / 3;
}

.content-media-primary {
  max-width: var(--container);
  margin: var(--space-lg) auto 0;
  padding: 0 24px;
  border: 0;
  background-color: transparent;
  border-radius: 0;
}

.content-media-primary img {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-line);
}

.content-media-primary figcaption {
  max-width: 76ch;
}

.channel-overview,
.topic-preview,
.watch-prep,
.update-brief,
.boundary-entry {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.channel-overview {
  border-top: 0;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.channel-overview .channel-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
}

.channel-overview .card-link {
  margin-top: auto;
  padding-top: var(--space-sm);
}

.topic-list {
  display: grid;
  gap: var(--space-md);
}

.topic-preview .topic-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xs);
  padding: var(--space-md);
  border-left: 3px solid var(--color-accent);
}

.topic-preview .card-link {
  margin-top: var(--space-sm);
}

.watch-prep .step-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.watch-prep .step-num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-card);
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.875rem;
  font-weight: 600;
}

.watch-prep .step-body {
  min-width: 0;
}

.watch-prep .step-text {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.update-brief .timeline-list {
  padding-left: var(--space-md);
}

.boundary-entry {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-top: 1px solid var(--color-line);
}

.boundary-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.boundary-copy {
  flex: 1 1 420px;
  min-width: 0;
}

.boundary-copy h2 {
  font-size: 1.25rem;
}

.boundary-copy p {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   pages · 频道分类
   -------------------------------------------------------------------------- */
.section-channels {
  border-top: 0;
  padding-top: var(--space-lg);
}

.channel-group {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-line);
}

.channel-group:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.channel-group-head {
  max-width: 76ch;
}

.channel-group-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.channel-group-desc {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.channel-group-figure {
  margin-top: var(--space-md);
}

.channel-group-figure img {
  aspect-ratio: 21 / 8;
}

.channel-group .channel-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--space-md);
}

.channel-group .channel-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
}

.channel-card-title {
  font-size: 1.0625rem;
  font-weight: 600;
}

.channel-card-scope {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.channel-card-direction {
  margin-top: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.channel-card-link {
  margin-top: auto;
  padding-top: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

.advice-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.advice-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
}

.advice-title {
  font-size: 1rem;
  font-weight: 600;
}

.advice-desc {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.advice-link {
  margin-top: auto;
  padding-top: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 专题片单
   -------------------------------------------------------------------------- */
.topics-list-section {
  padding: var(--space-lg) 0 var(--space-xl);
}

.topics-list-section .section-head {
  margin-bottom: var(--space-lg);
}

.topics-list-section .topic-list {
  gap: var(--space-lg);
}

.topic-card {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: var(--space-lg);
  padding: var(--space-md);
}

.topic-media {
  border: 0;
  background-color: transparent;
  border-radius: var(--radius-card);
}

.topic-media img {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-line);
}

.topic-body {
  min-width: 0;
  padding: var(--space-xs) 0;
}

.topic-name {
  font-size: 1.125rem;
  font-weight: 600;
}

.topic-scope {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-accent-dark);
}

.topic-desc {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.topic-link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

.topic-structure-section,
.topic-order-section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-line);
}

.structure-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.structure-item {
  padding: var(--space-md);
}

.structure-title {
  font-size: 1rem;
  font-weight: 600;
}

.structure-item p {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.order-list {
  display: grid;
  gap: var(--space-md);
}

.order-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.order-index {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-card);
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.875rem;
  font-weight: 600;
}

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

.order-title {
  font-size: 1rem;
  font-weight: 600;
}

.order-body p {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   pages · 观看指引（含页内目录）
   -------------------------------------------------------------------------- */
.page-guide .page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 260px);
  gap: var(--space-xl);
  align-items: start;
}

.page-guide .page-layout.sidebar-left {
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
}

.page-guide .page-aside {
  position: sticky;
  top: 88px;
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.aside-title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.toc-list {
  display: grid;
  gap: 4px;
  margin-top: var(--space-sm);
}

.toc-list a {
  display: block;
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.toc-list a:hover,
.toc-list a:focus-visible {
  color: var(--color-accent-dark);
}

.aside-note {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-line);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.aside-note a {
  display: inline-block;
  margin-right: 8px;
  font-weight: 600;
}

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

.page-guide .step-list {
  gap: var(--space-sm);
}

.page-guide .step-item {
  display: block;
  padding: var(--space-md);
}

.page-guide .step-title {
  font-size: 1rem;
  font-weight: 600;
}

.page-guide .step-text {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.page-guide .section-figure {
  margin-bottom: var(--space-md);
}

.page-guide .section-figure img {
  aspect-ratio: 16 / 9;
}

.related-list {
  display: grid;
  gap: var(--space-sm);
}

.related-item {
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.related-link {
  font-size: 1rem;
  font-weight: 600;
}

.related-text {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   pages · 变动记录
   -------------------------------------------------------------------------- */
.section-timeline {
  border-top: 0;
  padding-top: var(--space-lg);
}

.section-media {
  margin-bottom: var(--space-lg);
}

.section-media img {
  aspect-ratio: 21 / 8;
}

.section-timeline .timeline-item {
  grid-template-columns: minmax(96px, 140px) minmax(0, 1fr);
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.type-card {
  padding: var(--space-md);
}

.type-name {
  font-size: 1rem;
  font-weight: 600;
}

.type-desc {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.type-scope {
  margin-top: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-accent-dark);
}

.reading-list {
  display: grid;
  gap: var(--space-md);
}

.reading-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.reading-index {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-card);
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.875rem;
  font-weight: 600;
}

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

.reading-title {
  font-size: 1rem;
  font-weight: 600;
}

.reading-text {
  margin-top: 4px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   pages · 内容边界与反馈
   -------------------------------------------------------------------------- */
.section-scope {
  border-top: 0;
  padding-top: var(--space-lg);
}

.scope-list,
.exclude-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
}

.scope-item,
.exclude-item {
  padding: var(--space-md);
}

.scope-name,
.exclude-name {
  font-size: 1rem;
  font-weight: 600;
}

.scope-item p,
.exclude-item p {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.feedback-list {
  display: grid;
  gap: var(--space-md);
}

.feedback-item {
  padding: var(--space-md);
}

.feedback-name {
  font-size: 1rem;
  font-weight: 600;
}

.feedback-item p {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.feedback-note {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.feedback-note a {
  display: inline-block;
  margin-right: 12px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2xl) 24px;
}

.error-panel {
  max-width: 720px;
  padding: var(--space-xl) var(--space-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.error-code {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.error-panel h1 {
  margin-top: var(--space-xs);
  font-size: 1.75rem;
}

.error-desc {
  margin-top: var(--space-sm);
  font-size: 1rem;
  color: var(--color-text-muted);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-line);
}

.error-links a {
  display: block;
  padding: 10px 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   responsive · 平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-lg);
  }

  .hero-media {
    order: 2;
  }

  .channel-grid,
  .watch-prep .step-list,
  .advice-list,
  .structure-grid,
  .type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-lg);
  }

  .page-guide .page-layout,
  .page-guide .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-lg);
  }

  .page-guide .page-aside {
    position: static;
    order: 1;
  }

  .page-guide .page-content {
    order: 2;
  }
}

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 0 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-bottom: var(--space-sm);
  }

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

  .nav-list > li {
    display: block;
  }

  .nav-link {
    display: flex;
    min-height: 44px;
    padding: 0 4px;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-accent);
  }

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

  .hero-inner,
  .channel-overview,
  .topic-preview,
  .watch-prep,
  .update-brief,
  .boundary-entry,
  .content-media-primary {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

  .section-title {
    font-size: 1.25rem;
  }

  .channel-grid,
  .channel-group .channel-grid,
  .watch-prep .step-list,
  .advice-list,
  .structure-grid,
  .type-grid,
  .scope-list,
  .exclude-list,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .topic-card {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }

  .timeline-item,
  .section-timeline .timeline-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .device-row .device-cell + .device-cell {
    padding-top: 0;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 16px;
    padding-right: 16px;
  }

  .field-table,
  .field-table thead,
  .field-table tbody,
  .field-table tr,
  .field-table th,
  .field-table td {
    display: block;
    width: 100%;
  }

  .field-table thead {
    display: none;
  }

  .field-table tbody tr {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-line);
  }

  .field-table tbody th,
  .field-table tbody td {
    padding: 2px 0;
    border-bottom: 0;
  }

  .error-panel {
    padding: var(--space-lg) var(--space-md);
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (max-width: 480px) {
  .brand-slogan {
    font-size: 1rem;
    white-space: normal;
  }

  .hero-actions .btn,
  .error-actions .btn {
    flex: 1 1 100%;
  }

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
  }
}