:root {
  --color-primary: #E8734A;
  --color-primary-dark: #C85A34;
  --color-secondary: #2B4C7E;
  --color-secondary-light: #3D6199;
  --color-bg: #FDF8F4;
  --color-card: #FFFFFF;
  --color-text: #2D2A26;
  --color-text-muted: #6B6560;
  --color-border: #E8E0D8;
  --color-border-strong: #D4C9BE;
  --color-highlight: #FFF1E9;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(45, 42, 38, 0.06);
  --shadow-md: 0 4px 12px rgba(45, 42, 38, 0.08);
  --shadow-lg: 0 8px 24px rgba(45, 42, 38, 0.12);
  --container-width: 1200px;
  --header-height: 68px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-base: 0.22s ease;
}

/* ==========================================================================
   base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body.site-body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-secondary);
}

p {
  margin: 0;
}

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

dl,
dt,
dd {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* ==========================================================================
   layout - 全站骨架
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}

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

/* 品牌标识 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: #FFFFFF;
  font-weight: 700;
}

.brand:hover {
  color: #FFFFFF;
}

.brand-mark {
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(232, 115, 74, 0.22);
}

.brand-name {
  font-size: 18px;
  letter-spacing: 0;
  white-space: nowrap;
}

/* 主导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-item a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-item a:hover {
  color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-item a.is-current {
  color: #FFFFFF;
  background-color: var(--color-primary);
}

.nav-item a.is-current:hover {
  background-color: var(--color-primary-dark);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius-md);
  background-color: transparent;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  border-radius: 1px;
  background-color: #FFFFFF;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 主内容区 */
.site-main {
  display: block;
  width: 100%;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}

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

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--color-border);
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.3;
}

.page-description {
  margin-top: 12px;
  max-width: 860px;
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* 布局容器 */
.page-layout {
  display: grid;
  gap: 32px;
  grid-template-columns: 260px minmax(0, 1fr);
}

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

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

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

/* 页脚 */
.site-footer {
  background-color: var(--color-secondary);
  color: rgba(255, 255, 255, 0.78);
}

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

.footer-brand {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
}

.footer-summary {
  margin-top: 8px;
  max-width: 720px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer-col-title {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link-list a {
  display: inline-block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.74);
}

.footer-link-list a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-boundary {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-copy {
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   components - 通用组件
   ========================================================================== */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color var(--transition-base), color var(--transition-base),
    border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

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

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

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  background-color: var(--color-highlight);
}

/* 侧栏通用 */
.aside-title {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.aside-note {
  margin-bottom: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.aside-link-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-link-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.aside-link-list a:hover {
  background-color: var(--color-highlight);
  color: var(--color-primary-dark);
}

.aside-group + .aside-group {
  margin-top: 24px;
}

.aside-group-title {
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-secondary);
}

/* 区块通用 */
.section + .section {
  margin-top: 44px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-secondary);
}

.section-intro {
  margin-top: 10px;
  margin-bottom: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.section-intro a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-intro a:hover {
  color: var(--color-primary);
}

/* 通用图片容器 */
.section-figure,
.section-media,
.scene-figure,
.card-media,
.hero-media {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-card);
}

.section-figure img,
.section-media img,
.scene-figure img,
.card-media img,
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-figure figcaption,
.section-media figcaption,
.scene-figure figcaption,
.hero-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-muted);
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
}

/* 字段表格通用 */
.field-table {
  width: 100%;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.field-table caption {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-secondary);
  text-align: left;
  background-color: var(--color-highlight);
  border-bottom: 1px solid var(--color-border);
}

.field-table th,
.field-table td {
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.7;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.field-table thead th {
  background-color: var(--color-secondary);
  color: #FFFFFF;
  font-weight: 600;
  white-space: nowrap;
}

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

.field-table tbody tr:nth-child(even) {
  background-color: #FCFAF8;
}

.field-table tbody tr:hover {
  background-color: var(--color-highlight);
}

/* ==========================================================================
   pages - 首页
   ========================================================================== */

.home-main {
  display: block;
}

/* 首屏媒体化焦点区 */
.hero-section {
  position: relative;
  background-color: var(--color-secondary);
  background-image: linear-gradient(135deg, #2B4C7E 0%, #1F3A62 100%);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 48px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 56px;
}

.hero-copy {
  min-width: 0;
  color: #FFFFFF;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 12px;
  border-radius: var(--radius-md);
  background-color: rgba(232, 115, 74, 0.22);
  color: #FFD9C7;
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.28;
  color: #FFFFFF;
}

.hero-lead {
  margin-top: 16px;
  max-width: 560px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.42);
  color: #FFFFFF;
}

.hero-actions .btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #FFFFFF;
  color: #FFFFFF;
}

.hero-media {
  min-width: 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero-media img {
  aspect-ratio: 16 / 10;
  height: auto;
}

.hero-media figcaption {
  background-color: rgba(255, 255, 255, 0.96);
  color: var(--color-text-muted);
  border-top: none;
}

/* 首页三栏布局：主内容在前，aside 在后 */
.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 32px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

/* 首页主内容区 */
.home-section {
  padding: 28px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.home-section + .home-section {
  margin-top: 28px;
}

.section-head {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.section-head h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-secondary);
}

.section-desc {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.section-more {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--color-border);
}

.section-more a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.section-more a::after {
  content: "→";
  margin-left: 6px;
  transition: transform var(--transition-base);
}

.section-more a:hover {
  color: var(--color-primary);
}

.section-more a:hover::after {
  transform: translateX(4px);
}

/* 频道分类行列表 */
.channel-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channel-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) minmax(0, 1fr) 130px;
  gap: 16px;
  align-items: start;
  padding: 16px;
  background-color: #FCFAF8;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base),
    transform var(--transition-base), background-color var(--transition-base);
}

.channel-row:hover {
  background-color: var(--color-card);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

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

.channel-theme {
  color: var(--color-text);
}

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

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

/* 专题片单卡片 */
.collection-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.collection-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.collection-card .card-media {
  border-radius: 0;
}

.collection-card .card-media img {
  aspect-ratio: 16 / 9;
  height: auto;
}

.collection-card .card-title {
  padding: 16px 16px 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-secondary);
}

.collection-card .card-spec {
  padding: 12px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.collection-card .card-spec dt {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.collection-card .card-spec dd {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* 查阅路径编号清单 */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: step-counter;
}

.step-item {
  position: relative;
  padding: 18px 18px 18px 64px;
  background-color: #FCFAF8;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.step-index {
  position: absolute;
  top: 18px;
  left: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
}

.step-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.step-text {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

.step-basis {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* 收录范围调整记录 */
.record-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.record-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.record-date {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-dark);
  white-space: nowrap;
}

.record-change {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.65;
}

.record-note {
  grid-column: 2;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* 首页侧栏 */
.aside-channels,
.aside-entries {
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.aside-entries {
  margin-top: 24px;
}

/* ==========================================================================
   pages - 频道分类页
   ========================================================================== */

.page-channels .channels-nav-aside {
  align-self: start;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.channels-list-section .section-figure {
  margin-bottom: 24px;
}

.channels-list-section .section-figure img {
  aspect-ratio: 21 / 9;
  height: auto;
}

.channels-list-section .channel-rows {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.channels-list-section .channel-row {
  display: block;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.channels-list-section .channel-row:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.channels-list-section .channel-name {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-secondary);
}

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

.channel-fields .field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.channel-fields .field-value {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* 频道选择建议 */
.channel-advice-section .advice-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.channel-advice-section .advice-item {
  padding: 18px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.channel-advice-section .advice-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.channel-advice-section .advice-text {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* 频道与专题片单关联 */
.channel-collection-section .relation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.channel-collection-section .relation-col {
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.channel-collection-section .relation-title {
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.channel-collection-section .relation-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* ==========================================================================
   pages - 专题片单页
   ========================================================================== */

.page-collections .collections-aside {
  align-self: start;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.page-collections .collections-aside .aside-title + .aside-note + .aside-link-list {
  margin-bottom: 24px;
}

.page-collections .collections-aside .aside-title:not(:first-child) {
  margin-top: 24px;
}

.collections-overview .section-media {
  margin-bottom: 24px;
}

.collections-overview .section-media img {
  aspect-ratio: 21 / 9;
  height: auto;
}

.collections-overview .collection-card {
  display: block;
  padding: 0;
  overflow: hidden;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.collections-overview .collection-card + .collection-card {
  margin-top: 20px;
}

.collections-overview .collection-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.collection-card-head {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-highlight);
}

.collection-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-secondary);
}

.collection-tag {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-primary-dark);
}

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

.collection-meta dt {
  padding: 14px 20px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.collection-meta dd {
  padding: 0 20px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* 片单与频道对应关系 */
.collections-mapping .mapping-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.collections-mapping .mapping-item {
  padding: 18px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-secondary);
  border-radius: var(--radius-lg);
}

.collections-mapping .mapping-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.collections-mapping .mapping-desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* 片单查阅建议 */
.collections-advice .advice-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: advice-counter;
}

.collections-advice .advice-item {
  position: relative;
  padding: 18px 20px 18px 60px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.collections-advice .advice-item::before {
  content: counter(advice-counter);
  counter-increment: advice-counter;
  position: absolute;
  top: 18px;
  left: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
}

.collections-advice .advice-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.collections-advice .advice-desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.collections-advice .section-footnote {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--color-border);
  font-size: 14px;
}

.collections-advice .section-footnote a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ==========================================================================
   pages - 条目字段说明页
   ========================================================================== */

.page-fields .fields-layout {
  display: block;
  max-width: 920px;
  margin: 0 auto;
}

.page-fields .content-section + .content-section {
  margin-top: 44px;
}

.fields-table-section .section-media {
  margin-bottom: 24px;
}

.fields-table-section .section-media img {
  aspect-ratio: 21 / 9;
  height: auto;
}

.fields-table-section .table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
}

.fields-table-section .field-table {
  min-width: 640px;
}

.fields-table-section .field-table-caption {
  caption-side: top;
}

/* 字段取值示例与常见误区 */
.fields-example-section .example-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.fields-example-section .example-card {
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.fields-example-section .example-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.fields-example-section .example-card-title {
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.fields-example-section .example-card-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* 字段与查阅路径配合 */
.fields-usage-section .usage-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: usage-counter;
}

.fields-usage-section .usage-item {
  position: relative;
  padding: 18px 20px 18px 60px;
  background-color: #FCFAF8;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.fields-usage-section .usage-item::before {
  content: counter(usage-counter);
  counter-increment: usage-counter;
  position: absolute;
  top: 18px;
  left: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
}

.fields-usage-section .usage-item-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.fields-usage-section .usage-item-text {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.fields-usage-section .usage-item-text a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ==========================================================================
   pages - 查阅路径指引页
   ========================================================================== */

.page-guide .guide-steps .step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.page-guide .guide-steps .step-item {
  display: block;
  padding: 0;
  background-color: transparent;
  border: none;
}

.page-guide .guide-steps .step-card {
  height: 100%;
  padding: 22px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-guide .guide-steps .step-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.page-guide .guide-steps .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
}

.page-guide .guide-steps .step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-secondary);
}

.page-guide .guide-steps .step-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text);
}

.page-guide .guide-steps .step-text a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-guide .guide-steps .step-basis {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.step-basis-label {
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* 查阅场景 */
.guide-scene .scene-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.guide-scene .scene-figure {
  border: 1px solid var(--color-border);
}

.guide-scene .scene-figure img {
  aspect-ratio: 4 / 3;
  height: auto;
}

.guide-scene .scene-body {
  min-width: 0;
}

.guide-scene .scene-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text);
}

.guide-scene .scene-text + .scene-text {
  margin-top: 14px;
}

/* 每步要点 */
.guide-points .points-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.guide-points .point-card {
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.guide-points .point-title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.guide-points .point-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guide-points .point-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.guide-points .point-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

/* 常见问题 */
.guide-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guide-faq .faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.guide-faq .faq-item[open] {
  border-color: var(--color-primary);
}

.guide-faq .faq-question {
  position: relative;
  padding: 16px 48px 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-secondary);
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}

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

.guide-faq .faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  line-height: 1;
}

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

.guide-faq .faq-question:hover {
  color: var(--color-primary-dark);
}

.guide-faq .faq-answer {
  padding: 0 20px 18px;
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

.guide-faq .faq-answer p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* 反馈入口 */
.guide-feedback .feedback-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
}

.guide-feedback .feedback-subtitle {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
}

.guide-feedback .feedback-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: feedback-counter;
}

.guide-feedback .feedback-steps li {
  position: relative;
  padding: 14px 16px 14px 52px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text);
}

.guide-feedback .feedback-steps li::before {
  content: counter(feedback-counter);
  counter-increment: feedback-counter;
  position: absolute;
  top: 14px;
  left: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
}

.guide-feedback .feedback-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guide-feedback .feedback-link-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base),
    background-color var(--transition-base);
}

.guide-feedback .feedback-link-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-highlight);
  color: var(--color-primary-dark);
}

/* ==========================================================================
   pages - 404
   ========================================================================== */

.site-error .error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.error-hero {
  text-align: center;
  padding: 48px 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.error-hero h1 {
  margin-top: 16px;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-secondary);
}

.error-text {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.error-links {
  margin-top: 40px;
}

.error-links h2 {
  margin-bottom: 16px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-secondary);
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.error-link-list a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 12px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-secondary);
  text-align: center;
  transition: border-color var(--transition-base), box-shadow var(--transition-base),
    color var(--transition-base);
}

.error-link-list a:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  color: var(--color-primary-dark);
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1100px) {
  .home-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .channel-row {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 1fr) 110px;
    gap: 12px;
  }
}

@media (max-width: 900px) {
  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-guide .guide-steps .step-list,
  .guide-points .points-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .collection-meta dt:nth-of-type(3),
  .collection-meta dd:nth-of-type(3) {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  /* 页头与移动导航 */
  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  .brand-name {
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    display: block;
    background-color: var(--color-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow-md);
    padding: 8px 16px 16px;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

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

  .nav-item a {
    width: 100%;
    min-height: 48px;
    padding: 0 14px;
    font-size: 16px;
  }

  /* 骨架容器 */
  .inner-main {
    padding: 16px 16px 48px;
  }

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

  .page-header {
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

  /* 布局：单列，主内容在前 */
  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .home-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 48px;
  }

  /* 首屏 */
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 40px 16px 36px;
  }

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

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

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  /* 首页模块 */
  .home-section {
    padding: 20px;
  }

  .section-head h2 {
    font-size: 20px;
  }

  .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .channel-cell {
    display: flex;
    gap: 8px;
  }

  .channel-name {
    font-size: 16px;
  }

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

  .record-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .record-note {
    grid-column: 1;
  }

  /* 内页频道卡片 */
  .channels-list-section .channel-row {
    padding: 18px;
  }

  .channel-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .channel-collection-section .relation-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 专题片单 */
  .collection-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .collection-meta dt:nth-of-type(3),
  .collection-meta dd:nth-of-type(3) {
    grid-column: auto;
  }

  /* 字段表格移动端转卡片 */
  .fields-table-section .table-wrap {
    overflow-x: visible;
  }

  .fields-table-section .field-table {
    min-width: 0;
    border: none;
    background-color: transparent;
  }

  .fields-table-section .field-table thead {
    display: none;
  }

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

  .fields-table-section .field-table tr {
    margin-bottom: 14px;
    padding: 16px;
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
  }

  .fields-table-section .field-table tr:last-child {
    margin-bottom: 0;
  }

  .fields-table-section .field-table td {
    padding: 6px 0;
    border: none;
  }

  .fields-table-section .field-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 2px;
  }

  .fields-table-section .field-table-caption {
    display: block;
    margin-bottom: 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
  }

  /* 查阅路径指引 */
  .page-guide .guide-steps .step-list,
  .guide-points .points-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-scene .scene-layout,
  .guide-feedback .feedback-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .fields-example-section .example-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 404 */
  .site-error .error-main {
    padding: 32px 16px;
  }

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

  .error-hero h1 {
    font-size: 22px;
  }

  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 页脚 */
  .footer-inner {
    padding: 36px 16px 20px;
  }

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 22px;
  }

  .page-title {
    font-size: 22px;
  }

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

  .home-section {
    padding: 16px;
  }

  .btn {
    width: 100%;
  }

  .error-actions .btn {
    width: 100%;
  }
}