/* ==========================================================================
   飘花电影 guifena.cn — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、排版基准
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #f5f6f7;
  --bg-card: #ffffff;
  --text-main: #1f2328;
  --text-sub: #5b6470;
  --theme-green: #2f6f5e;
  --theme-green-dark: #245a4b;
  --warn-orange: #b4451f;
  --line: #d8dde2;
  --line-soft: #e7eaee;
  --radius: 6px;
  --shadow-card: 0 1px 2px rgba(31, 35, 40, 0.06);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, "Courier New", monospace;
  --container: 1120px;
  --gutter-desktop: 32px;
  --gutter-mobile: 20px;
}

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

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

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

p {
  margin: 0;
}

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

a {
  color: var(--theme-green);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

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

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

figure {
  margin: 0;
}

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

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

time {
  font-family: var(--font-mono);
  font-style: normal;
}

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

/* --------------------------------------------------------------------------
   layout：站点骨架（页头 / 主导航 / 主内容 / 页脚）
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 62px;
}

.brand {
  flex: 0 0 auto;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0;
  padding: 10px 0;
}

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

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

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

.nav-list li {
  flex: 0 0 auto;
}

.nav-list a {
  display: inline-block;
  padding: 9px 12px;
  font-size: 15px;
  color: var(--text-sub);
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
  line-height: 1.4;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--text-main);
  background-color: #eef1f3;
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--theme-green);
  font-weight: 600;
  border-bottom-color: var(--theme-green);
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-card);
  position: relative;
}

.nav-toggle::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 15px;
  height: 2px;
  background-color: var(--text-main);
  box-shadow: 0 6px 0 var(--text-main), 0 12px 0 var(--text-main);
}

.site-main {
  display: block;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px var(--gutter-desktop) 56px;
}

.inner-main {
  padding-top: 22px;
}

.site-footer {
  background-color: #23282d;
  color: #c6ccd3;
  margin-top: 24px;
}

.footer-top {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px var(--gutter-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid #363c42;
}

.footer-back,
.footer-top-link {
  color: #d7dde3;
  font-size: 14px;
  padding: 6px 0;
}

.footer-back:hover,
.footer-top-link:hover,
.footer-back:focus-visible,
.footer-top-link:focus-visible {
  color: #ffffff;
}

.footer-groups {
  max-width: var(--container);
  margin: 0 auto;
  padding: 26px var(--gutter-desktop) 10px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer-group {
  min-width: 0;
}

.footer-group-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 10px;
}

.footer-links li {
  margin-bottom: 7px;
}

.footer-links a {
  color: #b3bbc3;
  font-size: 14px;
  line-height: 1.6;
}

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

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px var(--gutter-desktop) 26px;
  border-top: 1px solid #363c42;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}

.footer-brand-note,
.footer-copyright {
  font-size: 13px;
  color: #8f979f;
  line-height: 1.7;
}

/* 内页双栏：默认主内容在前，.sidebar-left 时侧栏在前 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 268px;
  gap: 32px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 268px minmax(0, 1fr);
}

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

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

/* --------------------------------------------------------------------------
   components：通用组件
   -------------------------------------------------------------------------- */

/* 顶部信息条（首页） */
.topbar {
  background-color: #eceff1;
  border-bottom: 1px solid var(--line);
}

.topbar-structure,
.topbar-note {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter-desktop);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-sub);
}

.topbar-structure {
  padding-top: 10px;
}

.topbar-note {
  padding-bottom: 10px;
  color: var(--warn-orange);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 14px;
}

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

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

.breadcrumb-sep {
  color: #a8b0b8;
  font-family: var(--font-mono);
}

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

/* 内页标题区 */
.page-header {
  padding-bottom: 18px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 760px;
}

/* 首页区块通用 */
.section {
  padding: 34px 0;
  border-top: 1px solid var(--line-soft);
}

.section:first-of-type {
  border-top: none;
  padding-top: 0;
}

.section-head {
  margin-bottom: 20px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 820px;
}

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

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

/* 内容区块（内页） */
.content-section {
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 78px;
}

.content-section:first-of-type {
  border-top: none;
  padding-top: 4px;
}

.content-section > h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
}

.content-section > p {
  font-size: 16px;
  color: var(--text-main);
  margin-bottom: 14px;
  max-width: 760px;
}

.section-lead {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 760px;
  margin-bottom: 14px;
}

/* 侧栏目录与相关入口 */
.aside-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.aside-nav,
.aside-related,
.aside-block,
.aside-body,
.toc-nav {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 12px;
  margin-bottom: 16px;
}

.aside-nav-list li,
.aside-list li,
.aside-related-list li,
.toc-list li,
.sidebar-links li {
  margin-bottom: 4px;
}

.aside-nav-list a,
.aside-list a,
.aside-related-list a,
.toc-list a,
.sidebar-links a {
  display: block;
  padding: 7px 8px;
  font-size: 14px;
  color: var(--text-sub);
  border-left: 3px solid transparent;
  border-radius: 3px;
  line-height: 1.5;
}

.aside-nav-list a:hover,
.aside-list a:hover,
.aside-related-list a:hover,
.toc-list a:hover,
.sidebar-links a:hover,
.aside-nav-list a:focus-visible,
.aside-list a:focus-visible,
.aside-related-list a:focus-visible,
.toc-list a:focus-visible,
.sidebar-links a:focus-visible {
  color: var(--theme-green);
  background-color: #f0f4f2;
  border-left-color: var(--theme-green);
  text-decoration: none;
}

.aside-note {
  background-color: #fbf3ee;
  border: 1px solid #e6cdbf;
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 16px;
}

.aside-note .aside-title {
  color: var(--warn-orange);
}

.aside-note p {
  font-size: 14px;
  color: #6b4a3a;
  line-height: 1.7;
}

.aside-toggle,
.aside-nav-toggle {
  display: none;
}

.page-sidebar .sidebar-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.page-sidebar .toc-nav,
.page-sidebar .sidebar-links {
  list-style: none;
}

.page-sidebar > .sidebar-links {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 12px;
  margin-bottom: 16px;
}

/* 图片容器 */
.hero-figure,
.playlist-figure,
.section-media,
.section-figure {
  background-color: #e9ecef;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.section-media,
.section-figure {
  margin: 16px 0 20px;
}

.section-media img {
  aspect-ratio: 16 / 7;
}

.section-figure img {
  aspect-ratio: 16 / 6;
}

.section-media figcaption,
.section-figure figcaption,
.figure-caption,
.media-caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-sub);
  background-color: #fafbfc;
  border-top: 1px solid var(--line-soft);
  line-height: 1.6;
}

/* 两栏说明块 */
.two-column,
.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.column-block,
.col-box {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  min-width: 0;
}

.column-block h3,
.col-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.column-block p,
.col-box p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 8px;
}

.column-block p:last-child,
.col-box p:last-child {
  margin-bottom: 0;
}

/* 编号步骤（首页 / 片单 / 字段 / 查阅路径共用，按父级限定） */
.step-list {
  display: grid;
  gap: 12px;
}

.step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.step-num,
.step-index {
  flex: 0 0 auto;
  min-width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--theme-green);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
}

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

.step-name,
.step-title {
  font-size: 18px;
  margin-bottom: 6px;
}

.step-desc,
.step-text {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* 警示块 */
.boundary-note,
.notice-block {
  background-color: #fbf3ee;
  border: 1px solid #e6cdbf;
  border-left: 4px solid var(--warn-orange);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 16px;
}

.boundary-note p,
.boundary-note-text,
.notice-text,
.boundary-text {
  font-size: 15px;
  color: #6b4a3a;
  line-height: 1.75;
}

.boundary-list {
  display: grid;
  gap: 8px;
}

.boundary-list li,
.boundary-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.boundary-list li::before,
.boundary-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--warn-orange);
  border-radius: 50%;
}

.section-note {
  margin-top: 14px;
  font-size: 15px;
}

/* 普通列表 */
.plain-list {
  display: grid;
  gap: 8px;
}

.plain-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--theme-green);
  border-radius: 50%;
}

/* 术语表 */
.term-list {
  margin: 0;
}

.term-list dt {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 10px;
}

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

.term-list dd {
  margin: 2px 0 0;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* 文本链接 */
.text-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 15px;
  font-weight: 600;
}

.section-foot {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 15px;
}

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

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 30px 0 34px;
}

.hero-aside {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  min-width: 0;
}

.hero-aside-title {
  font-size: 16px;
  font-weight: 600;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.clue-list {
  display: grid;
  gap: 14px;
}

.clue-item {
  min-width: 0;
  padding-left: 2px;
}

.clue-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--theme-green);
  margin-bottom: 2px;
}

.clue-link {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
}

.clue-link:hover,
.clue-link:focus-visible {
  color: var(--theme-green);
}

.clue-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-top: 4px;
}

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

.hero-figure {
  margin-bottom: 20px;
}

.hero-figure img {
  aspect-ratio: 16 / 8;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 720px;
  margin-bottom: 18px;
}

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

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--theme-green);
  color: #ffffff;
}

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

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

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

/* 题材频道方向总览 */
.channel-rows {
  display: grid;
  gap: 10px;
}

.channel-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 18px;
  align-items: baseline;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.channel-name {
  font-size: 17px;
  font-weight: 600;
  min-width: 0;
}

.channel-name a {
  color: var(--text-main);
}

.channel-name a:hover,
.channel-name a:focus-visible {
  color: var(--theme-green);
}

.channel-tone,
.channel-scope {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
  min-width: 0;
}

/* 专题片单速览 */
.playlist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.playlist-card {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px 18px;
  min-width: 0;
}

.playlist-figure {
  margin-bottom: 14px;
}

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

.playlist-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.playlist-name a {
  color: var(--text-main);
}

.playlist-name a:hover,
.playlist-name a:focus-visible {
  color: var(--theme-green);
}

.playlist-scope {
  font-size: 14px;
  color: var(--theme-green);
  margin-bottom: 6px;
}

.playlist-thought,
.playlist-idea {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* 字段与收录边界摘要 */
.field-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.field-column {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  min-width: 0;
}

.column-title {
  font-size: 18px;
  margin-bottom: 12px;
}

.field-table {
  font-size: 15px;
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.field-table thead th {
  font-weight: 600;
  color: var(--text-main);
  background-color: #f3f5f6;
  border-bottom: 1px solid var(--line);
}

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

.field-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
  width: 96px;
}

.column-more {
  margin-top: 12px;
  font-size: 15px;
}

.boundary-column .boundary-note {
  margin-bottom: 14px;
}

/* 查阅路径分步说明 */
.path-steps .step-list {
  gap: 10px;
}

/* 收录范围调整记录摘要 */
.adjust-list {
  display: grid;
  gap: 10px;
}

.adjust-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--theme-green);
  border-radius: var(--radius);
  padding: 14px 18px;
  min-width: 0;
}

.adjust-time {
  display: inline-block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 4px;
}

.adjust-subject {
  font-size: 17px;
  margin-bottom: 4px;
}

.adjust-desc {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* 站内页面索引 */
.index-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.index-column {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.index-column-title {
  font-size: 16px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}

.index-links {
  display: grid;
  gap: 6px;
}

.index-links a {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  padding: 3px 0;
}

.index-links a:hover,
.index-links a:focus-visible {
  color: var(--theme-green);
}

/* --------------------------------------------------------------------------
   pages：题材频道
   -------------------------------------------------------------------------- */
.channel-overview-list {
  display: grid;
  gap: 10px;
}

.channel-overview-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  min-width: 0;
}

.channel-overview-item h3 {
  font-size: 17px;
  margin-bottom: 5px;
}

.channel-overview-item p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.channel-scope-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 12px;
  min-width: 0;
}

.channel-scope-item:last-child {
  margin-bottom: 0;
}

.channel-scope-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.channel-scope-item p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 6px;
}

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

.advice-list {
  display: grid;
  gap: 10px;
}

.advice-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--theme-green);
  border-radius: var(--radius);
  padding: 14px 18px;
  min-width: 0;
}

.advice-item h3 {
  font-size: 17px;
  margin-bottom: 5px;
}

.advice-item p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

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

.playlist-cards .playlist-card {
  display: flex;
  flex-direction: column;
}

.playlist-cards .playlist-card .text-link {
  margin-top: auto;
  padding-top: 10px;
}

.playlist-cards .playlist-idea {
  margin-bottom: 4px;
}

/* --------------------------------------------------------------------------
   pages：条目字段说明
   -------------------------------------------------------------------------- */
.field-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.field-item .field-name {
  font-size: 17px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}

.field-desc {
  font-size: 15px;
  color: var(--text-main);
  line-height: 1.75;
  margin-bottom: 6px;
}

.field-pos {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages：查阅路径
   -------------------------------------------------------------------------- */
.focus-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.focus-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.focus-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.focus-desc {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

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

.order-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.order-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.order-desc {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages：收录范围调整记录
   -------------------------------------------------------------------------- */
.timeline-list {
  display: grid;
  gap: 0;
  border-left: 2px solid var(--line);
  padding-left: 22px;
  margin-left: 6px;
}

.timeline-item {
  position: relative;
  padding: 0 0 22px;
  min-width: 0;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 8px;
  width: 10px;
  height: 10px;
  background-color: var(--bg-card);
  border: 2px solid var(--theme-green);
  border-radius: 50%;
}

.timeline-time {
  display: inline-block;
  font-size: 13px;
  color: var(--theme-green);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 18px;
  margin-bottom: 6px;
}

.timeline-text {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.direction-list {
  display: grid;
  gap: 10px;
}

.direction-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  min-width: 0;
}

.direction-title {
  font-size: 17px;
  margin-bottom: 5px;
}

.direction-text {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

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

.scope-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.scope-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.scope-text {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.boundary-block {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.boundary-block .boundary-text {
  font-size: 16px;
  color: var(--text-main);
  line-height: 1.75;
  margin-bottom: 14px;
}

.related-section .related-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.related-item {
  min-width: 0;
}

.related-item a {
  display: block;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 44px;
}

.related-item a:hover,
.related-item a:focus-visible {
  border-color: var(--theme-green);
  color: var(--theme-green);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  padding-top: 48px;
}

.error-block {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: left;
  max-width: 760px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  color: var(--warn-orange);
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-title {
  font-size: 26px;
  margin-bottom: 10px;
}

.error-text {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.error-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 22px;
  background-color: var(--theme-green);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
}

.error-home:hover,
.error-home:focus-visible {
  background-color: var(--theme-green-dark);
  color: #ffffff;
  text-decoration: none;
}

.error-routes {
  margin-top: 30px;
}

.error-routes-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.error-route-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.error-route-list a {
  display: block;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  min-height: 44px;
  line-height: 1.6;
}

.error-route-list a:hover,
.error-route-list a:focus-visible {
  border-color: var(--theme-green);
  color: var(--theme-green);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive：960px / 640px 断点
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .site-header-inner {
    padding: 0 var(--gutter-mobile);
    flex-wrap: wrap;
    min-height: 58px;
  }

  .nav-toggle {
    display: block;
  }

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

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 10px;
    border-top: 1px solid var(--line-soft);
  }

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

  .nav-list a {
    display: block;
    padding: 12px 8px;
    font-size: 16px;
    border-bottom: 1px solid var(--line-soft);
    border-left: 3px solid transparent;
  }

  .nav-list a.is-current {
    border-bottom-color: var(--line-soft);
    border-left-color: var(--theme-green);
  }

  .site-main {
    padding: 22px var(--gutter-mobile) 44px;
  }

  .page-layout,
  .sidebar-left .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .page-header {
    margin-bottom: 20px;
  }

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

  .section-title,
  .content-section > h2 {
    font-size: 20px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 22px 0 26px;
  }

  .hero-main {
    display: flex;
    flex-direction: column;
  }

  .hero-title {
    order: 1;
    font-size: 26px;
    margin-bottom: 10px;
  }

  .hero-lead {
    order: 2;
  }

  .hero-actions {
    order: 3;
    margin-bottom: 18px;
  }

  .hero-figure {
    order: 4;
    margin-bottom: 0;
  }

  .hero-aside {
    order: 5;
  }

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

  .playlist-grid,
  .playlist-cards,
  .order-list,
  .scope-list,
  .related-section .related-list,
  .error-route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .field-columns,
  .two-column,
  .two-col,
  .field-list,
  .focus-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 22px var(--gutter-mobile) 8px;
  }

  .footer-top,
  .footer-bottom {
    padding-left: var(--gutter-mobile);
    padding-right: var(--gutter-mobile);
  }

  /* 侧栏目录在移动端折叠为内容区上方的可展开列表 */
  .aside-toggle,
  .aside-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 44px;
    padding: 10px 14px;
    background-color: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    text-align: left;
  }

  .aside-toggle::after,
  .aside-nav-toggle::after {
    content: "+";
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--theme-green);
  }

  .aside-toggle[aria-expanded="true"]::after,
  .aside-nav-toggle[aria-expanded="true"]::after {
    content: "−";
  }

  .page-aside .aside-nav,
  .page-aside .aside-related,
  .page-aside .aside-block,
  .page-aside .aside-body {
    margin-top: 10px;
  }

  .page-aside > .aside-nav:first-child > .aside-title,
  .page-aside .aside-related > .aside-title {
    padding-top: 2px;
  }

  .page-aside .aside-nav-toggle + .aside-nav-list {
    display: none;
  }

  .page-aside .aside-nav-toggle[aria-expanded="true"] + .aside-nav-list {
    display: block;
    margin-top: 8px;
  }

  .page-aside .aside-toggle + .aside-body {
    display: none;
  }

  .page-aside .aside-toggle[aria-expanded="true"] + .aside-body {
    display: block;
  }

  .page-aside .aside-block {
    margin-bottom: 0;
    border: none;
    border-radius: 0;
    padding: 0;
  }

  .page-aside .aside-block + .aside-block {
    margin-top: 14px;
  }
}

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

  .topbar-structure,
  .topbar-note {
    padding-left: var(--gutter-mobile);
    padding-right: var(--gutter-mobile);
    font-size: 12px;
  }

  .brand {
    font-size: 17px;
  }

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

  .section-title,
  .content-section > h2 {
    font-size: 20px;
  }

  .section {
    padding: 26px 0;
  }

  .content-section {
    padding: 22px 0;
  }

  .playlist-grid,
  .playlist-cards,
  .order-list,
  .scope-list,
  .related-section .related-list,
  .error-route-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .step-item {
    padding: 14px 14px;
    gap: 12px;
  }

  .step-num,
  .step-index {
    min-width: 28px;
    height: 28px;
    font-size: 13px;
  }

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

  .field-table th,
  .field-table td {
    padding: 8px 6px;
    font-size: 14px;
  }

  .field-column,
  .column-block,
  .col-box,
  .playlist-card,
  .channel-overview-item,
  .channel-scope-item,
  .advice-item,
  .field-item,
  .focus-item,
  .order-item,
  .scope-item,
  .direction-item,
  .index-column,
  .boundary-block,
  .error-block {
    padding: 14px 15px;
  }

  .error-block {
    padding: 26px 20px;
  }

  .error-code {
    font-size: 32px;
  }

  .error-title {
    font-size: 21px;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 20px var(--gutter-mobile) 6px;
  }

  .footer-top {
    flex-wrap: wrap;
    gap: 6px 18px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }

  .timeline-list {
    padding-left: 18px;
    margin-left: 4px;
  }

  .timeline-item::before {
    left: -25px;
  }

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

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

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}