/* ==========================================================================
   麻豆传媒官网油管 - 全站样式表
   视觉方向：文化场馆风 · 米白底 / 赭石 / 铜绿
   ========================================================================== */

/* ==========================================================================
   Base — 基础变量、重置与全局元素
   ========================================================================== */

:root {
  --color-bg: #f5f2ec;
  --color-text: #2b2926;
  --color-accent: #8a6d3b;
  --color-accent-dark: #6b5430;
  --color-teal: #3e5c58;
  --color-teal-dark: #2f4744;
  --color-surface: #e8e2d8;
  --color-border: #d8d2c8;
  --color-white: #ffffff;
  --color-muted: #6f6a62;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

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

  --header-height: 72px;
  --space-section: 64px;
  --space-block: 40px;

  --transition-base: 0.25s ease;
}

*,
*::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: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: 34px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

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

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Layout — 全站统一骨架：页头、主容器、页脚、面包屑
   ========================================================================== */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

/* ---------- 页头 ---------- */

.site-header {
  background-color: var(--color-bg);
  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);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  font-size: 14px;
  color: var(--color-text);
  min-height: 44px;
}

.nav-toggle-icon {
  display: block;
  width: 16px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.25s ease, top 0.25s ease;
}

.nav-toggle-icon::before {
  top: -5px;
}

.nav-toggle-icon::after {
  top: 5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle-text {
  font-size: 14px;
}

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

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.site-nav .nav-list li a:hover {
  background-color: var(--color-surface);
  color: var(--color-accent-dark);
}

.site-nav .nav-list li a.is-current {
  background-color: var(--color-surface);
  color: var(--color-accent-dark);
  font-weight: 600;
}

/* ---------- 主容器 ---------- */

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 72px;
}

/* ---------- 面包屑 ---------- */

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

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

.breadcrumb a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

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

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

/* ---------- 页面标题区 ---------- */

.page-header {
  padding: 28px 0 36px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.page-title {
  font-size: 34px;
  line-height: 1.3;
  margin-bottom: 12px;
}

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

/* ---------- 页脚 ---------- */

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-col h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.footer-col ul li a:hover {
  color: var(--color-accent);
}

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

.footer-bottom p {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 4px;
  line-height: 1.6;
}

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

/* ---------- 区块标题 ---------- */

.section-title {
  font-size: 24px;
  margin-bottom: 28px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background-color: var(--color-accent);
}

/* ---------- 展签式条目 ---------- */

.brief-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.brief-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(43, 41, 38, 0.06);
}

.brief-cat {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  min-width: 96px;
  flex-shrink: 0;
}

.brief-desc {
  flex: 1;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.brief-item a {
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---------- 步骤条 ---------- */

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

.step-item {
  position: relative;
  padding: 28px 24px 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  counter-increment: step-counter;
}

.step-item::before {
  content: counter(step-counter, decimal-leading-zero);
  display: block;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ---------- 时间线 ---------- */

.timeline-list {
  position: relative;
  padding-left: 24px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding: 0 0 28px 24px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item time {
  display: block;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.timeline-item p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ---------- 表格 ---------- */

.entry-table {
  width: 100%;
  border: 1px solid var(--color-border);
  font-size: 15px;
}

.entry-table thead th {
  background-color: var(--color-surface);
  font-family: var(--font-serif);
  font-weight: 700;
  text-align: left;
  padding: 14px 16px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
}

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

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

.entry-table tbody tr:nth-child(even) td {
  background-color: #faf8f4;
}

/* ---------- 画廊 ---------- */

.gallery-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
  align-items: start;
}

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

.gallery-main img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.gallery-main figcaption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.gallery-thumbs {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.thumb-item,
.thumb {
  display: block;
  width: 100%;
  padding: 4px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: none;
  transition: border-color var(--transition-base), opacity var(--transition-base);
  text-align: left;
}

.thumb-item img,
.thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.thumb-item:hover,
.thumb:hover {
  opacity: 0.85;
}

.thumb-item.is-active,
.thumb.is-active {
  border-color: var(--color-accent);
}

.gallery-status {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 4px;
}

/* ---------- 折叠 FAQ ---------- */

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background-color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
  transition: transform 0.25s ease;
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item summary:hover {
  background-color: #faf8f4;
}

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

.faq-item p strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ---------- 动作链接 ---------- */

.action-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.action-link:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

/* ---------- 相关链接条 ---------- */

.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 24px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  margin-top: 48px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background-color: var(--color-white);
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

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

/* ---------- 内页相关入口侧栏 ---------- */

.inner-main aside.related-links,
.inner-main aside.related-entry {
  margin-top: 48px;
  padding: 28px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.inner-main aside.related-links h2,
.inner-main aside.related-entry h2 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.inner-main aside.related-links ul li,
.inner-main aside.related-entry ul li {
  margin-bottom: 10px;
}

.inner-main aside.related-links ul li a,
.inner-main aside.related-entry ul li a {
  font-size: 15px;
  color: var(--color-accent);
}

.inner-main aside.related-links ul li a:hover,
.inner-main aside.related-entry ul li a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* ---------- 内容区块 ---------- */

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

.content-section > h2,
.module-block > h2,
.section-block > h2 {
  font-size: 24px;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 12px;
}

.content-section > h2::after,
.module-block > h2::after,
.section-block > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background-color: var(--color-accent);
}

.content-section > p,
.module-block > p,
.section-block > p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

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

/* ---------- 首屏焦点区 ---------- */

.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.hero-text {
  padding-top: 16px;
}

.hero-text h1 {
  font-size: 34px;
  line-height: 1.35;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 0;
}

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

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

.hero-entries {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 8px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.entry-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(43, 41, 38, 0.08);
}

.entry-card .entry-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.entry-card .entry-desc {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ---------- 栏目索引主次网格 ---------- */

.index-grid-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
}

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

.grid-card {
  padding: 28px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.grid-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

.grid-card a {
  font-size: 14px;
  font-weight: 600;
}

.grid-card-feature {
  grid-column: span 2;
  background-color: var(--color-surface);
  border-color: var(--color-border);
  padding: 32px;
}

.grid-card-feature h3 {
  font-size: 20px;
}

.grid-card-feature p {
  font-size: 15px;
}

/* ---------- 频道分类速览 ---------- */

.channel-brief-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
}

.channel-brief-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* ---------- 观看流程四步 ---------- */

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

/* ---------- 最近更新时间线 ---------- */

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

/* ---------- 入口类型对比 ---------- */

.entry-compare-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
}

.table-conclusion {
  margin-top: 20px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
}

.table-conclusion a {
  font-weight: 600;
}

.entry-compare-section .action-link {
  margin-top: 16px;
}

/* ---------- 专题画廊 ---------- */

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

.gallery-section .action-link {
  margin-top: 16px;
}

/* ---------- 内容声明条 ---------- */

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

.notice-section .section-title {
  margin-bottom: 16px;
}

.notice-text {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  padding: 20px 24px;
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.notice-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

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

/* ==========================================================================
   Pages — 频道百科
   ========================================================================== */

.channel-overview .channel-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.channel-table {
  min-width: 640px;
}

.channel-table thead th {
  background-color: var(--color-surface);
  font-family: var(--font-serif);
  font-weight: 700;
  text-align: left;
  padding: 14px 16px;
  border-bottom: 2px solid var(--color-border);
}

.channel-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  line-height: 1.7;
}

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

.channel-table tbody tr:nth-child(even) td {
  background-color: #faf8f4;
}

/* 题材分组条目 */

.genre-entries .genre-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  align-items: start;
}

.genre-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.genre-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.genre-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.genre-content p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.genre-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-teal);
  background-color: rgba(62, 92, 88, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
}

/* 频道与片单关联 */

.channel-related .related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.channel-related .related-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.channel-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-text);
}

.channel-related .related-list li a {
  font-size: 14px;
  white-space: nowrap;
}

/* ==========================================================================
   Pages — 专题片库
   ========================================================================== */

.gallery-module {
  margin-bottom: 48px;
}

.gallery-module > h2 {
  font-size: 24px;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}

.gallery-module > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background-color: var(--color-accent);
}

.gallery-module .gallery-wrap {
  grid-template-columns: 1fr 240px;
}

.gallery-module .gallery-main {
  background-color: var(--color-white);
}

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

.gallery-figure figcaption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 专题卡片列表 */

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

.topic-card {
  padding: 28px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.topic-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.topic-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.topic-card p:last-child {
  margin-bottom: 0;
  margin-top: auto;
}

.topic-card .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-teal);
  background-color: rgba(62, 92, 88, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
  margin-right: 8px;
  margin-bottom: 4px;
}

/* 题材背景说明 */

.theme-background {
  padding: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.theme-background h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.theme-background p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* 频道关联入口 */

.channel-links .link-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.channel-links .link-list li {
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.channel-links .link-list li a {
  font-size: 15px;
  font-weight: 600;
}

/* ==========================================================================
   Pages — 观看指南
   ========================================================================== */

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

.entry-type-section .entry-card {
  padding: 28px;
}

.entry-type-section .entry-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.entry-type-section .entry-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 观看流程步骤 */

.watch-steps-section .steps-list {
  grid-template-columns: repeat(4, 1fr);
}

/* 多端适配 */

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

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

.device-item h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.device-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.device-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.device-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.device-figure figcaption {
  padding: 12px 20px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-white);
  text-align: center;
}

/* 观看问题处理 */

.troubleshoot-section .faq-group {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ==========================================================================
   Pages — 入口说明
   ========================================================================== */

.entry-compare-section .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.entry-compare-section .entry-table {
  min-width: 720px;
}

.table-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* APP 与下载说明 */

.app-download-section .entry-card-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.app-download-section .entry-card {
  padding: 28px;
}

.app-download-section .entry-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.app-download-section .entry-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.entry-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.entry-media figcaption {
  padding: 12px 20px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-white);
  text-align: center;
}

/* 结论说明 */

.entry-conclusion-section {
  padding: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.entry-conclusion-section h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.entry-conclusion-section p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.conclusion-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 20px;
}

/* 安全提示 */

.entry-safety-section .safety-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.entry-safety-section .safety-list li {
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  position: relative;
  padding-left: 44px;
}

.entry-safety-section .safety-list li::before {
  content: "!";
  position: absolute;
  left: 16px;
  top: 16px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  line-height: 20px;
}

/* ==========================================================================
   Pages — 版本动态
   ========================================================================== */

.update-summary {
  padding: 28px 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent);
}

.update-summary p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 0;
}

/* 版本时间线 */

.version-timeline .timeline-list {
  padding-left: 32px;
}

.version-timeline .timeline-list::before {
  left: 8px;
}

.version-timeline .timeline-item {
  padding-bottom: 32px;
}

.version-timeline .timeline-item::before {
  left: -32px;
  width: 16px;
  height: 16px;
}

.version-timeline .timeline-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.version-timeline .timeline-item p {
  font-size: 14px;
}

/* 更新内容说明 */

.update-details .detail-item {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.update-details .detail-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.update-details .detail-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 后续关注提示 */

.future-notice {
  padding: 28px 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.future-notice p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.future-notice p a {
  display: inline-block;
  margin-right: 16px;
  font-weight: 600;
}

/* 媒体配图 */

.media-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-top: 32px;
}

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

.media-figure figcaption {
  padding: 12px 20px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-white);
  text-align: center;
}

/* ==========================================================================
   Pages — 内容声明
   ========================================================================== */

/* 网站定位说明 */

.site-position .position-content {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
}

.position-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.position-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.position-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 14px;
}

/* 不提供服务列表 */

.non-service .section-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.non-service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.non-service-list li {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.non-service-list li h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-accent-dark);
}

.non-service-list li p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 信息使用建议 */

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

.advice-card {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.advice-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.advice-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 合规原则 */

.compliance-content {
  padding: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.compliance-content > p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.principle-list {
  margin-bottom: 16px;
}

.principle-list li {
  padding: 10px 0 10px 28px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

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

.principle-list li::before {
  content: "·";
  position: absolute;
  left: 8px;
  font-size: 20px;
  color: var(--color-accent);
}

.compliance-content .closing-note {
  font-size: 14px;
  color: var(--color-muted);
  font-style: italic;
  margin-bottom: 0;
}

/* 相关入口卡片 */

.nei-rong-sheng-ming .related-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: stretch;
}

.related-card {
  padding: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.related-card a {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

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

.faq-intro-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.faq-intro-figure img {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
}

.faq-intro-figure figcaption {
  padding: 12px 20px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-white);
  text-align: center;
}

.faq-group {
  margin-bottom: 48px;
}

.faq-group > h2 {
  font-size: 22px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.faq-group > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-accent);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 后续帮助入口 */

.help-entry {
  padding: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.help-entry h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.help-entry-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

.help-card {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.help-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.help-card p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.help-card a {
  font-size: 14px;
  font-weight: 600;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 96px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 24px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.error-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  border-radius: var(--radius-md);
}

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

.error-link {
  display: inline-block;
  padding: 12px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  background-color: var(--color-white);
}

.error-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.error-help a {
  margin: 0 8px;
  font-weight: 600;
}

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

/* ---------- 1024px ---------- */

@media (max-width: 1024px) {
  :root {
    --container-padding: 20px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-entries {
    grid-column: 1 / -1;
  }

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

  .grid-card-feature {
    grid-column: span 2;
  }

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

  .gallery-wrap {
    grid-template-columns: 1fr 220px;
  }

  .site-position .position-content {
    grid-template-columns: 1fr;
  }

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

  .nei-rong-sheng-ming .related-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 768px ---------- */

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --space-section: 40px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
  }

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

  /* 移动端导航 */

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    z-index: 99;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px;
    display: none;
  }

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

  .site-nav .nav-list li a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    font-size: 16px;
  }

  .site-nav .nav-list li:last-child a {
    border-bottom: none;
  }

  /* 页脚 */

  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    padding: 36px 20px 24px;
  }

  /* 首页 */

  .hero-section {
    padding-top: 32px;
  }

  .hero-text h1 {
    font-size: 28px;
  }

  .hero-entries {
    grid-template-columns: 1fr;
  }

  .entry-card {
    padding: 16px 20px;
  }

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

  .grid-card-feature {
    grid-column: span 1;
  }

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

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

  .step-item {
    padding: 20px 24px;
  }

  .step-item::before {
    font-size: 24px;
  }

  .gallery-wrap {
    grid-template-columns: 1fr;
  }

  .gallery-thumbs {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .thumb-item,
  .thumb {
    width: calc(25% - 6px);
    flex-shrink: 0;
  }

  .thumb-item img,
  .thumb img {
    aspect-ratio: 1 / 1;
  }

  /* 内页 */

  .page-header {
    padding: 20px 0 28px;
    margin-bottom: 32px;
  }

  .genre-entries .genre-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .genre-media img {
    aspect-ratio: 16 / 9;
  }

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

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

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

  .entry-type-section .entry-card-grid {
    grid-template-columns: 1fr;
  }

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

  .app-download-section .entry-card-group {
    grid-template-columns: 1fr;
  }

  .entry-safety-section .safety-list {
    grid-template-columns: 1fr;
  }

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

  .usage-advice .advice-grid {
    grid-template-columns: 1fr;
  }

  .help-entry-grid {
    grid-template-columns: 1fr;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .related-links-label {
    margin-right: 0;
    margin-bottom: 4px;
  }

  .related-links-item {
    margin-bottom: 4px;
  }

  .nei-rong-sheng-ming .related-links {
    grid-template-columns: 1fr;
  }

  .conclusion-actions {
    flex-direction: column;
  }

  .conclusion-actions .action-link {
    text-align: center;
  }

  .device-figure img,
  .entry-media img,
  .media-figure img {
    aspect-ratio: 16 / 9;
  }

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

  .error-code {
    font-size: 64px;
  }
}

/* ---------- 520px ---------- */

@media (max-width: 520px) {
  :root {
    --container-padding: 16px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

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

  .brand-name {
    font-size: 17px;
  }

  .brand-tag {
    font-size: 11px;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 16px;
  }

  .hero-text h1 {
    font-size: 24px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .brief-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 14px 16px;
  }

  .brief-cat {
    min-width: 0;
    font-size: 15px;
  }

  .brief-desc {
    font-size: 13px;
  }

  .brief-item a {
    align-self: flex-start;
  }

  .timeline-item {
    padding-left: 16px;
  }

  .timeline-list {
    padding-left: 16px;
  }

  .timeline-list::before {
    left: 4px;
  }

  .timeline-item::before {
    left: -16px;
    width: 10px;
    height: 10px;
  }

  .entry-table thead th,
  .entry-table tbody td {
    padding: 10px 12px;
    font-size: 13px;
  }

  .channel-table thead th,
  .channel-table tbody td {
    padding: 10px 12px;
    font-size: 13px;
  }

  .grid-card,
  .grid-card-feature {
    padding: 20px;
  }

  .topic-card {
    padding: 20px;
  }

  .genre-entries .genre-item {
    padding: 16px;
  }

  .entry-type-section .entry-card,
  .app-download-section .entry-card {
    padding: 20px;
  }

  .device-item {
    padding: 20px;
  }

  .non-service-list li {
    padding: 18px 20px;
  }

  .advice-card {
    padding: 20px;
  }

  .compliance-content {
    padding: 20px;
  }

  .help-entry {
    padding: 20px;
  }

  .help-card {
    padding: 20px;
  }

  .faq-item summary {
    padding: 14px 44px 14px 16px;
    font-size: 14px;
  }

  .faq-item .faq-answer,
  .faq-item > p {
    padding: 12px 16px 14px;
    font-size: 13px;
  }

  .related-links {
    padding: 16px;
  }

  .inner-main aside.related-links,
  .inner-main aside.related-entry {
    padding: 20px;
  }

  .error-section {
    padding: 0 16px;
  }

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

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

  .error-btn,
  .error-link {
    text-align: center;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}