/* ==========================================================================
   九九影院全部电视剧 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base · 基础重置与全站变量
   ========================================================================== */

:root {
  --c-primary: #1f6feb;
  --c-primary-dark: #1758bd;
  --c-accent: #f97316;
  --c-bg: #f7f9fc;
  --c-surface: #ffffff;
  --c-text: #1f2937;
  --c-muted: #5b6673;
  --c-line: #e3e8ef;
  --c-tag-bg: #eef3fb;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-sm: 0 1px 2px rgba(31, 41, 55, 0.06);
  --shadow-md: 0 6px 18px rgba(31, 41, 55, 0.08);
  --container: 1120px;
  --reading: 760px;
  --gap: 24px;
}

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

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

body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 12px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-text);
}

p {
  margin: 0 0 14px;
}

ul,
ol {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

a:hover,
a:focus-visible {
  color: var(--c-primary-dark);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   layout · 全站骨架：body / header / nav / main / footer
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 16px;
  line-height: 1.8;
}

/* --- 页头 --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  color: var(--c-text);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  color: var(--c-primary);
  text-decoration: none;
}

/* --- 主导航 --- */

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--c-muted);
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--c-tag-bg);
  color: var(--c-primary);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--c-primary);
  font-weight: 600;
  background: var(--c-tag-bg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-text);
  border-radius: 1px;
}

/* --- 主内容容器 --- */

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

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

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

/* --- 面包屑与页面标题区 --- */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 18px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.6;
}

.breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-primary);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: #a7b0bb;
}

.breadcrumb-current {
  color: var(--c-text);
  font-weight: 600;
}

.page-header {
  padding: 14px 0 26px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 32px;
}

.page-title {
  margin: 0 0 10px;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-text);
}

.page-description {
  max-width: var(--reading);
  margin: 0;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.8;
}

/* --- 页脚 --- */

.site-footer {
  margin-top: 24px;
  background: var(--c-surface);
  border-top: 1px solid var(--c-line);
}

.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 24px;
}

.footer-cta {
  margin: 0 0 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
  color: var(--c-muted);
}

.footer-cta a {
  font-weight: 600;
  color: var(--c-primary);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 32px;
  margin-bottom: 22px;
}

.footer-group h2 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
}

.footer-group ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-group li {
  margin-bottom: 6px;
}

.footer-group a {
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
}

.footer-group a:hover,
.footer-group a:focus-visible {
  color: var(--c-primary);
  text-decoration: underline;
}

.footer-note {
  margin: 0 0 6px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 14px;
}

.footer-copy {
  margin: 0;
  color: #8a939f;
  font-size: 13px;
}

/* ==========================================================================
   components · 通用组件：标签 / 表格 / 媒体 / 列表 / 折叠
   ========================================================================== */

.tag {
  display: inline-block;
  padding: 2px 9px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-tag-bg);
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-genre {
  border-color: #dbe6f7;
  background: #eef3fb;
  color: #2b5fa8;
}

.tag-field {
  border-color: #fbe0c8;
  background: #fef3e8;
  color: #b45309;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

/* --- 通用表格 --- */

.data-table,
.genre-table,
.field-table {
  width: 100%;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}

.data-table caption,
.genre-table caption,
.field-table caption,
.table-caption {
  padding: 12px 16px;
  text-align: left;
  color: var(--c-muted);
  font-size: 14px;
  caption-side: top;
}

.data-table thead th,
.genre-table thead th,
.field-table thead th {
  padding: 12px 16px;
  background: #f1f5fa;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-text);
  font-size: 14px;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

.data-table tbody th,
.data-table tbody td,
.genre-table tbody th,
.genre-table tbody td,
.field-table tbody td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
  line-height: 1.7;
}

.data-table tbody th,
.genre-table tbody th {
  color: var(--c-text);
  font-weight: 600;
  white-space: nowrap;
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td,
.genre-table tbody tr:last-child th,
.genre-table tbody tr:last-child td,
.field-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover,
.genre-table tbody tr:hover {
  background: #fafcff;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* --- 媒体与图注 --- */

.hero-figure,
.content-media,
.section-media,
.about-figure,
.genre-card-media {
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.hero-figure img,
.content-media img,
.section-media img,
.about-figure img,
.genre-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #eef2f7;
}

.hero-figure figcaption,
.content-media figcaption,
.section-media figcaption,
.about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.7;
}

/* --- 区块通用 --- */

.section-lead,
.section-desc,
.section-intro {
  max-width: var(--reading);
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.section-more,
.section-link {
  margin: 16px 0 0;
  font-size: 15px;
}

.section-more a,
.section-link a {
  font-weight: 600;
}

/* --- 折叠条目 --- */

.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  margin-bottom: 10px;
}

.faq-item summary {
  padding: 14px 16px;
  color: var(--c-text);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "＋";
  float: right;
  color: var(--c-muted);
  font-weight: 400;
}

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

.faq-item summary:hover {
  color: var(--c-primary);
}

.faq-item p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--c-muted);
  font-size: 15px;
}

/* --- 边界清单 --- */

.boundary-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.boundary-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 4px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--c-accent);
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

/* --- 顶部信息条 --- */

.top-notice {
  margin: 0;
  padding: 9px 24px;
  background: #eef3fb;
  border-bottom: 1px solid #dbe6f7;
  color: #2b5fa8;
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

/* --- 首屏定位区 --- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--c-line);
}

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

.hero-title {
  margin: 0 0 14px;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-text);
}

.hero-desc {
  max-width: 560px;
  margin: 0 0 20px;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.85;
}

.hero-entry {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  color: var(--c-text);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.entry-link:hover,
.entry-link:focus-visible {
  border-color: var(--c-primary);
  background: var(--c-tag-bg);
  color: var(--c-primary);
  text-decoration: none;
}

.hero-entry li:first-child .entry-link {
  border-color: var(--c-primary);
  background: var(--c-primary);
  color: #ffffff;
}

.hero-entry li:first-child .entry-link:hover,
.hero-entry li:first-child .entry-link:focus-visible {
  background: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
  color: #ffffff;
}

.hero-figure {
  margin: 0;
}

.hero-figure img {
  aspect-ratio: 16 / 10;
}

.content-media-primary {
  grid-column: 1 / -1;
  max-width: 640px;
}

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

/* --- 首页通用区块间距 --- */

.genre-table,
.field-summary,
.update-glance,
.page-index {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-index {
  border-bottom: 0;
  padding-bottom: 8px;
}

.genre-table h2,
.field-summary h2,
.update-glance h2,
.page-index h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.genre-table .data-table {
  margin-top: 18px;
}

/* --- 字段与收录边界摘要 --- */

.field-summary-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  margin-top: 18px;
}

.field-dict,
.field-boundary {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.field-dict h3,
.field-boundary h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
}

.field-dict > p,
.field-boundary > p {
  color: var(--c-muted);
  font-size: 15px;
}

.field-list {
  margin: 0;
  padding: 0;
}

.field-list dt {
  margin-top: 12px;
  color: var(--c-text);
  font-size: 14px;
  font-weight: 700;
}

.field-list dt:first-child {
  margin-top: 0;
}

.field-list dd {
  margin: 2px 0 0;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--c-line);
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

.field-list dd:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.field-boundary .boundary-list {
  margin-top: 6px;
}

/* --- 更新线索速览 --- */

.update-months {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.update-month {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.update-month h3 {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.update-records {
  margin: 0;
  padding: 0;
  list-style: none;
}

.update-records li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

.update-records li:last-child {
  margin-bottom: 0;
}

/* --- 站内页面索引 --- */

.index-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.index-col {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.index-col h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.index-col p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ==========================================================================
   pages · 题材方向页
   ========================================================================== */

.section {
  margin-bottom: 44px;
}

.section h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.genre-table-section .table-scroll {
  margin-top: 18px;
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 20px;
}

.genre-card {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.genre-card:hover {
  border-color: #c9dbf5;
  box-shadow: var(--shadow-md);
}

.genre-card-media {
  margin: 0;
  border: 0;
  border-right: 1px solid var(--c-line);
  border-radius: 0;
}

.genre-card-media img {
  height: 100%;
  aspect-ratio: 4 / 3;
}

.genre-card-body {
  min-width: 0;
  padding: 18px;
}

.genre-card-body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.genre-card-body p {
  margin: 0 0 10px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

.genre-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

/* --- 关联浏览路径 --- */

.path-list {
  margin: 18px 0 22px;
  padding: 0;
  list-style: none;
  counter-reset: path;
}

.path-item {
  position: relative;
  min-width: 0;
  margin-bottom: 16px;
  padding: 18px 20px 18px 56px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.path-item::before {
  counter-increment: path;
  content: counter(path);
  position: absolute;
  top: 18px;
  left: 18px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--c-tag-bg);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.path-item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.path-item p {
  margin: 0 0 8px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.path-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  font-size: 14px;
}

.related-entry {
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.related-entry h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-list a {
  font-size: 15px;
}

/* ==========================================================================
   pages · 更新线索页
   ========================================================================== */

.updates-section,
.updates-actions,
.updates-basis {
  margin-bottom: 44px;
}

.updates-section h2,
.updates-actions h2,
.updates-basis h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.updates-timeline {
  margin-top: 20px;
  border-left: 2px solid var(--c-line);
  padding-left: 24px;
}

.updates-month {
  position: relative;
  min-width: 0;
  margin-bottom: 26px;
}

.updates-month::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -31px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--c-surface);
  border-radius: 50%;
  background: var(--c-primary);
}

.month-title {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.updates-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.updates-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.updates-item p {
  flex: 1 1 320px;
  min-width: 0;
  margin: 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* --- 整理动作卡片 --- */

.actions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.action-card {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.action-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.action-card p {
  margin: 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* --- 整理依据 --- */

.updates-basis .section-media {
  margin: 18px 0 20px;
  max-width: 640px;
}

.updates-basis .section-media img {
  aspect-ratio: 16 / 9;
}

.basis-body {
  max-width: var(--reading);
}

.basis-body p {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.85;
}

/* ==========================================================================
   pages · 字段说明页
   ========================================================================== */

.page-layout {
  display: block;
}

.fields-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

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

.content-section h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.fields-dict .section-media {
  margin: 18px 0 22px;
  max-width: 640px;
}

.fields-dict .section-media img {
  aspect-ratio: 16 / 9;
}

.field-table {
  margin-top: 6px;
}

.field-table tbody td:first-child {
  width: 190px;
  color: var(--c-text);
  font-weight: 600;
  white-space: nowrap;
}

.scope-list {
  margin: 16px 0 18px;
  padding: 0;
  list-style: none;
}

.scope-list li {
  position: relative;
  padding: 12px 16px 12px 42px;
  margin-bottom: 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.scope-list li::before {
  content: "×";
  position: absolute;
  top: 12px;
  left: 16px;
  color: var(--c-accent);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.8;
}

.scope-note,
.faq-note {
  max-width: var(--reading);
  color: var(--c-muted);
  font-size: 15px;
}

.fields-faq .faq-item:first-of-type {
  margin-top: 16px;
}

/* ==========================================================================
   pages · 关于本站
   ========================================================================== */

.about-principles,
.about-columns,
.about-boundary {
  margin-bottom: 44px;
}

.about-principles h2,
.about-columns h2,
.about-boundary h2 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
}

.about-principles > p,
.about-columns > p,
.about-boundary > p {
  max-width: var(--reading);
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.85;
}

.about-figure {
  margin: 20px 0;
  max-width: 640px;
}

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

.column-roles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.role-item {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.role-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.role-item p {
  margin: 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.about-boundary .boundary-list {
  max-width: var(--reading);
  margin: 16px 0 18px;
}

.about-boundary .boundary-list li {
  padding: 10px 16px 10px 42px;
  margin-bottom: 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.about-boundary .boundary-list li::before {
  top: 18px;
  left: 20px;
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.error-hero {
  max-width: 720px;
}

.error-code {
  margin: 0 0 8px;
  color: var(--c-accent);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.error-hero h1 {
  margin: 0 0 14px;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
}

.error-text {
  max-width: 620px;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.85;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  border: 1px solid var(--c-primary);
  background: var(--c-primary);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  border-color: var(--c-primary-dark);
  background: var(--c-primary-dark);
  color: #ffffff;
  text-decoration: none;
}

.btn-ghost {
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  color: var(--c-text);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-primary);
  color: var(--c-primary);
  text-decoration: none;
}

.error-tips {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--c-line);
}

.error-tips h2 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 700;
}

.error-tip-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.error-tip-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
}

.tip-path {
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  background: var(--c-tag-bg);
  color: #2b5fa8;
  font-size: 13px;
  white-space: nowrap;
}

/* ==========================================================================
   responsive · 断点 960px / 640px
   ========================================================================== */

@media (max-width: 960px) {
  .header-inner {
    position: relative;
    flex-wrap: wrap;
    padding: 12px 20px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 8px 0 4px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-list a {
    min-height: 48px;
    padding: 12px 10px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }

  .home-main,
  .inner-main {
    padding: 0 20px 48px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px 0 32px;
  }

  .content-media-primary {
    max-width: 100%;
  }

  .field-summary-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

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

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

  .genre-card {
    grid-template-columns: 180px minmax(0, 1fr);
  }

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

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

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .top-notice {
    padding: 8px 16px;
    font-size: 12px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .brand {
    font-size: 17px;
  }

  .home-main,
  .inner-main {
    padding: 0 16px 40px;
  }

  .breadcrumb {
    padding-top: 14px;
    font-size: 13px;
  }

  .page-header {
    padding: 12px 0 20px;
    margin-bottom: 24px;
  }

  .page-title,
  .hero-title,
  .error-hero h1 {
    font-size: 26px;
  }

  .hero {
    gap: 20px;
    padding: 22px 0 26px;
  }

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

  .entry-link {
    justify-content: center;
    width: 100%;
  }

  .genre-table,
  .field-summary,
  .update-glance,
  .page-index {
    padding: 28px 0;
  }

  .genre-table h2,
  .field-summary h2,
  .update-glance h2,
  .page-index h2,
  .section h2,
  .updates-section h2,
  .updates-actions h2,
  .updates-basis h2,
  .content-section h2,
  .about-principles h2,
  .about-columns h2,
  .about-boundary h2,
  .error-tips h2 {
    font-size: 20px;
  }

  .update-months,
  .index-columns,
  .actions-grid,
  .column-roles,
  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .field-dict,
  .field-boundary,
  .update-month,
  .index-col,
  .action-card,
  .role-item,
  .related-entry {
    padding: 16px;
  }

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

  .genre-card-media {
    border-right: 0;
    border-bottom: 1px solid var(--c-line);
  }

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

  .updates-timeline {
    padding-left: 18px;
  }

  .updates-month::before {
    left: -25px;
  }

  .updates-item {
    padding: 12px 14px;
  }

  .path-item {
    padding: 16px 16px 16px 52px;
  }

  .path-item::before {
    top: 16px;
    left: 16px;
  }

  .field-table tbody td:first-child {
    width: auto;
    white-space: normal;
  }

  .scope-list li,
  .about-boundary .boundary-list li {
    padding: 12px 14px 12px 38px;
  }

  .scope-list li::before,
  .about-boundary .boundary-list li::before {
    left: 16px;
  }

  .error-main {
    padding: 40px 16px 48px;
  }

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

  .btn-primary,
  .btn-ghost {
    justify-content: center;
    width: 100%;
  }

  .footer-inner {
    padding: 26px 16px 20px;
  }
}