/* ============================================================
   红苹果短剧 · jiurun99.com
   全站样式表
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ============================================================
   Base
   ============================================================ */

:root {
  --color-bg: #f7f4ef;
  --color-bg-soft: #fbf9f5;
  --color-text: #27231f;
  --color-text-soft: #5c554d;
  --color-accent: #9f4d32;
  --color-accent-soft: #b06a51;
  --color-green: #3d5a52;
  --color-line: #d9d2c8;
  --color-line-soft: #e7e1d8;
  --color-white: #ffffff;

  --container-max: 1180px;
  --container-pad: 32px;
  --gutter: 24px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif CJK SC", Georgia, serif;

  --text-body: 15px;
  --text-body-lg: 16px;
  --text-small: 13px;
  --text-lead: 17px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --header-h: 72px;
  --transition-base: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.35;
  font-weight: 600;
  color: var(--color-text);
}

h1 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h2 {
  font-size: 24px;
  font-weight: 600;
}

h3 {
  font-size: 17px;
  font-weight: 600;
}

p {
  overflow-wrap: break-word;
}

figure {
  margin: 0;
}

figcaption {
  font-size: var(--text-small);
  color: var(--color-text-soft);
  line-height: 1.6;
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

::selection {
  background: rgba(159, 77, 50, 0.15);
  color: var(--color-text);
}

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

/* 屏幕阅读器隐藏
   用于保留语义但不需要视觉展示的内容 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Layout
   ============================================================ */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-mark {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-mark::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  margin-right: 8px;
  vertical-align: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list a {
  display: block;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--color-accent);
  background-color: rgba(159, 77, 50, 0.06);
}

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: rgba(159, 77, 50, 0.08);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* 页面内容主区域 */
.site-main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* 内页主区域（带面包屑的阅读壳） */
.inner-main {
  padding-top: var(--space-4);
  padding-bottom: var(--space-7);
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line-soft);
}

.breadcrumb a {
  color: var(--color-text-soft);
  transition: color var(--transition-base);
}

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

.breadcrumb-sep {
  color: var(--color-line);
  user-select: none;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-line);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-5) var(--container-pad) var(--space-4);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-5);
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.footer-brand-name::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  margin-right: 8px;
  vertical-align: 2px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-soft);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--color-text-soft);
  transition: color var(--transition-base);
}

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

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

.footer-bottom p {
  max-width: var(--container-max);
  margin: 0 auto;
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* ============================================================
   Components
   ============================================================ */

/* 文字链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

.text-link::after {
  content: "→";
  font-size: 14px;
  transition: transform var(--transition-base);
}

.text-link:hover::after {
  transform: translateX(3px);
}

/* 折叠面板 */
.faq-list {
  border-top: 1px solid var(--color-line);
}

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  padding: 20px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  transition: color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

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

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

.faq-item p {
  padding: 0 0 20px;
  color: var(--color-text-soft);
  max-width: 720px;
}

/* 图片容器与说明 */
.crossword-figure img,
.example-figure img,
.combine-figure img,
.comparison-figure img,
.hero-figure img,
.check-visual img,
.boundary-figure img,
.term-relation-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.crossword-figure figcaption,
.example-figure figcaption,
.combine-figure figcaption,
.comparison-figure figcaption,
.hero-figure figcaption,
.check-visual figcaption,
.boundary-figure figcaption,
.term-relation-figure figcaption {
  margin-top: 10px;
  padding-left: 2px;
}

/* 通用按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base);
}

.btn-primary:hover {
  background-color: var(--color-accent-soft);
  color: var(--color-white);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: transparent;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Pages · 首页 (index.html)
   ============================================================ */

/* 定位首屏 */
.intro-position {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-5);
  padding: var(--space-6) 0 var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.intro-copy h1 {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.intro-lead {
  font-size: var(--text-lead);
  color: var(--color-text-soft);
  margin-bottom: var(--space-2);
  max-width: 480px;
}

.intro-copy > p:not(.intro-lead) {
  color: var(--color-text-soft);
  max-width: 480px;
}

.intro-directory {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
}

.directory-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line-soft);
  margin-bottom: 12px;
}

.directory-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}

.directory-list a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text);
  border-bottom: 1px solid transparent;
  transition: color var(--transition-base);
}

.directory-list a:hover {
  color: var(--color-accent);
}

.directory-note {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-line-soft);
}

.hero-figure {
  margin-top: 16px;
}

/* 双路入口 */
.entry-board {
  padding: var(--space-5) 0;
}

.entry-board h2 {
  margin-bottom: 8px;
}

.entry-board .section-desc {
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
  max-width: 640px;
}

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

.entry-cell {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition-base);
}

.entry-cell:hover {
  border-color: var(--color-line);
}

.entry-cell h3 {
  font-size: 16px;
}

.entry-cell p {
  font-size: 14px;
  color: var(--color-text-soft);
  flex-grow: 1;
}

.entry-cell a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  align-self: flex-start;
}

.entry-cell a:hover {
  text-decoration: underline;
}

/* 图文棋盘行 */
.crossword-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: center;
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
}

.crossword-copy h2 {
  margin-bottom: var(--space-2);
}

.crossword-copy p {
  color: var(--color-text-soft);
  margin-bottom: 12px;
}

.crossword-copy .text-link {
  margin-top: 8px;
}

.crossword-figure img {
  border: 1px solid var(--color-line-soft);
}

/* 观看核验带 */
.watch-band {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
}

.watch-band h2 {
  margin-bottom: 8px;
}

.watch-band .section-desc {
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
}

.watch-timing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.watch-timing-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  position: relative;
}

.timing-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(159, 77, 50, 0.1);
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
  font-family: "SF Mono", "Fira Code", monospace;
  margin-bottom: 12px;
}

.watch-timing-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.watch-timing-item p {
  font-size: 14px;
  color: var(--color-text-soft);
}

.watch-band .band-link {
  margin-top: var(--space-3);
}

/* 名词与边界入口带 */
.terms-boundary-band {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
}

.terms-boundary-band h2 {
  margin-bottom: var(--space-4);
}

.band-entry-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.band-entry {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.band-entry h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.band-entry p {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 12px;
}

/* 首页折叠问答 */
.faq-fold {
  padding: var(--space-5) 0 var(--space-6);
  border-top: 1px solid var(--color-line);
}

.faq-fold h2 {
  margin-bottom: var(--space-3);
}

/* ============================================================
   Pages · 内页通用
   ============================================================ */

.page-header {
  margin-bottom: var(--space-5);
}

.page-description {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-2);
}

.page-lead,
.page-intro {
  font-size: var(--text-lead);
  color: var(--color-text-soft);
  max-width: 720px;
  line-height: 1.7;
}

/* 区块标题 */
.section-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: var(--space-3);
}

.section-index {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", "Fira Code", monospace;
  flex-shrink: 0;
}

.section-intro,
.section-lead,
.section-note,
.section-desc {
  font-size: 15px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
}

/* 延伸阅读 */
.extended-links {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.extended-links-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.extended-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-soft);
}

.extended-link-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.extended-link-items a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.extended-link-items a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Pages · 频道全景 (channel-map.html)
   ============================================================ */

/* 频道划分依据 */
.intro-criteria {
  margin-bottom: var(--space-5);
}

.criteria-body {
  max-width: 720px;
}

.criteria-body p {
  color: var(--color-text-soft);
  margin-bottom: 12px;
}

/* 频道方向条目清单 */
.channel-list {
  margin-bottom: var(--space-5);
}

.channel-items {
  border-top: 1px solid var(--color-line);
}

.channel-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line-soft);
}

.channel-num {
  font-size: 15px;
  font-weight: 700;
  font-family: "SF Mono", "Fira Code", monospace;
  color: var(--color-accent);
  padding-top: 2px;
}

.channel-item-body h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.channel-item-body p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 双频道对照 */
.comparison-pair {
  margin-bottom: var(--space-5);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.comparison-figure img {
  width: 100%;
  border: 1px solid var(--color-line-soft);
}

.comparison-notes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.comparison-note-item {
  background-color: var(--color-bg-soft);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-2) var(--space-3);
}

.comparison-note-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.comparison-note-item p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 频道与片单衔接 */
.channel-playlist-note {
  margin-bottom: var(--space-5);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.note-body p {
  color: var(--color-text-soft);
  margin-bottom: 8px;
  max-width: 760px;
}

.note-body a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================================
   Pages · 题材标签 (genre-tags.html)
   ============================================================ */

.tag-intro {
  margin-bottom: var(--space-5);
  max-width: 720px;
}

.tag-intro h2 {
  margin-bottom: var(--space-2);
}

.tag-intro p {
  color: var(--color-text-soft);
  margin-bottom: 8px;
}

/* 标签组 */
.tag-group-list {
  margin-bottom: var(--space-5);
}

.tag-group {
  margin-bottom: var(--space-4);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.tag-group-header {
  margin-bottom: var(--space-2);
}

.tag-group-header h3 {
  font-size: 18px;
}

.tag-group-header p {
  font-size: 14px;
  color: var(--color-text-soft);
}

.tag-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
}

.tag-items li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-line-soft);
}

.tag-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.tag-desc {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 相近标签差异 */
.tag-diff {
  margin-bottom: var(--space-5);
}

.diff-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.diff-item {
  padding: var(--space-3);
  background-color: var(--color-bg-soft);
}

.diff-item + .diff-item {
  border-left: 1px solid var(--color-line-soft);
  background-color: var(--color-bg);
}

.diff-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.diff-item h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.diff-item + .diff-item h3::before {
  background-color: var(--color-green);
}

.diff-item p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 标签组合示例 */
.tag-combination-demo {
  margin-bottom: var(--space-4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
}

.combine-text h2 {
  margin-bottom: var(--space-2);
}

.combine-text p {
  color: var(--color-text-soft);
}

.combine-visual img {
  border: 1px solid var(--color-line-soft);
}

.combine-steps {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.combine-step {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-body h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-body p {
  font-size: 14px;
  color: var(--color-text-soft);
}

.step-body a {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
  display: inline-block;
  margin-top: 4px;
}

/* 延伸阅读列表 */
.related-read {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.related-read h2 {
  font-size: 18px;
  margin-bottom: var(--space-3);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.related-links li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Pages · 片单构成 (playlist-mix.html)
   ============================================================ */

/* 片单构成要素 */
.mix-elements {
  margin-bottom: var(--space-5);
}

.elements-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-3);
}

.element-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.element-index {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", "Fira Code", monospace;
}

.element-card h3 {
  font-size: 16px;
}

.element-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* 排布步骤 */
.build-steps {
  margin-bottom: var(--space-5);
}

.step-list {
  counter-reset: step;
}

.step-item {
  position: relative;
  padding: var(--space-3) 0 var(--space-3) 64px;
  border-bottom: 1px solid var(--color-line-soft);
}

.step-number {
  position: absolute;
  left: 0;
  top: var(--space-3);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  font-family: "SF Mono", "Fira Code", monospace;
  background-color: var(--color-bg);
}

.step-item h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-text-soft);
  max-width: 640px;
}

/* 片单结构示例 */
.mix-example {
  margin-bottom: var(--space-5);
}

.example-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: center;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.example-text p {
  color: var(--color-text-soft);
  margin-bottom: 12px;
  line-height: 1.8;
}

.example-figure img {
  border: 1px solid var(--color-line-soft);
}

/* 片单变体 */
.mix-variants {
  margin-bottom: var(--space-5);
}

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

.variant-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.variant-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.variant-card h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-green);
  flex-shrink: 0;
}

.variant-card p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 衔接观看核验 */
.to-watchcheck {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.to-watchcheck h2 {
  margin-bottom: var(--space-2);
}

.to-watchcheck p {
  color: var(--color-text-soft);
  margin-bottom: 8px;
  max-width: 720px;
}

.to-watchcheck a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================================
   Pages · 观看核验 (watchcheck.html)
   ============================================================ */

.check-timing-section,
.check-steps-section,
.abnormal-section,
.after-check-section {
  margin-bottom: var(--space-5);
}

/* 核验时机 */
.timing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.timing-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.timing-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.timing-item p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 完整核验步骤 */
.steps-list {
  border-top: 1px solid var(--color-line);
}

.steps-list .step-item {
  border-bottom: 1px solid var(--color-line);
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-head h3 {
  font-size: 17px;
}

.step-detail p {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 4px;
  max-width: 760px;
}

.step-detail strong {
  color: var(--color-text);
  font-weight: 600;
}

/* 异常信号 */
.signal-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.signal-col {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.signal-col h3 {
  font-size: 17px;
  margin-bottom: var(--space-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line-soft);
}

.signal-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line-soft);
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

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

.check-visual {
  margin-top: var(--space-4);
}

.check-visual img {
  border: 1px solid var(--color-line-soft);
}

/* 核验通过后 */
.confirm-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.confirm-item {
  background-color: var(--color-bg-soft);
  border-left: 3px solid var(--color-green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-2) var(--space-3);
}

.confirm-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.confirm-item p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 边界衔接 */
.related-boundary-section {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.related-boundary-section h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.related-boundary-section > p {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.related-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Pages · 名词手册 (terms.html)
   ============================================================ */

.term-intro {
  margin-bottom: var(--space-5);
}

.term-intro .section-title {
  margin-bottom: var(--space-2);
}

.term-intro-body {
  max-width: 720px;
}

.term-intro-body p {
  color: var(--color-text-soft);
  margin-bottom: 8px;
}

.term-group {
  margin-bottom: var(--space-5);
}

.term-group .section-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.term-group-desc {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
}

.term-list {
  border-top: 1px solid var(--color-line);
}

.term-item {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line-soft);
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-3);
}

.term-name {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.term-pinyin {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-soft);
}

.term-def {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.75;
}

/* 术语关系索引 */
.term-relation {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.term-relation .section-title {
  margin-bottom: 8px;
}

.term-relation-desc {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
}

.term-relation-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
}

.relation-chain {
  counter-reset: chain;
}

.relation-chain li {
  position: relative;
  padding: 8px 0 8px 44px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-line-soft);
}

.relation-chain li::before {
  counter-increment: chain;
  content: counter(chain);
  position: absolute;
  left: 0;
  top: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(159, 77, 50, 0.1);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.relation-chain strong {
  font-weight: 600;
  color: var(--color-accent);
}

.relation-note {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-top: var(--space-2);
  line-height: 1.7;
}

.term-relation-links {
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line-soft);
}

.term-relation-links p {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.term-relation-links li {
  margin-bottom: 4px;
}

.term-relation-links li a {
  font-size: 14px;
  color: var(--color-text-soft);
  transition: color var(--transition-base);
}

.term-relation-links li a:hover {
  color: var(--color-accent);
}

.term-relation-figure img {
  border: 1px solid var(--color-line-soft);
}

/* ============================================================
   Pages · 边界与反馈 (boundaries.html)
   ============================================================ */

/* 标题区变体 */
.page-header-text .page-kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

/* 内容边界 */
.boundary-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-5);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.boundary-intro-copy h2 {
  margin-bottom: var(--space-2);
}

.boundary-intro-copy p {
  color: var(--color-text-soft);
  margin-bottom: 8px;
  line-height: 1.8;
}

.boundary-figure img {
  border: 1px solid var(--color-line-soft);
}

/* 不包含清单 */
.not-included {
  margin-bottom: var(--space-5);
}

.not-included .section-lead {
  margin-bottom: var(--space-3);
}

.not-included-list {
  border-top: 1px solid var(--color-line);
}

.not-included-list li {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line-soft);
  align-items: flex-start;
}

.list-index {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", "Fira Code", monospace;
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}

.list-copy h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.list-copy p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* 信息组织与局限 */
.limits-note {
  margin-bottom: var(--space-5);
}

.limits-note h2 {
  margin-bottom: var(--space-3);
}

.limits-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.limits-col {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.limits-col h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.limits-col p {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 8px;
  line-height: 1.75;
}

/* 反馈路径 */
.feedback-path {
  margin-bottom: var(--space-5);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.feedback-path .section-lead {
  margin-bottom: var(--space-3);
}

.feedback-steps {
  counter-reset: feedback;
}

.feedback-steps li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) 56px;
  border-bottom: 1px solid var(--color-line-soft);
}

.feedback-steps li:last-child {
  border-bottom: none;
}

.feedback-steps .step-number {
  position: absolute;
  left: 0;
  top: var(--space-2);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
}

.step-copy h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-copy p {
  font-size: 14px;
  color: var(--color-text-soft);
}

.feedback-note {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line-soft);
}

/* 延伸阅读卡片 */
.extended-link-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.extended-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.extended-link-card h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.extended-link-card h3 a:hover {
  color: var(--color-accent);
}

.extended-link-card p {
  font-size: 14px;
  color: var(--color-text-soft);
}

/* ============================================================
   Pages · 404 (404.html)
   ============================================================ */

.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--container-pad);
}

.error-section {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
  font-family: "SF Mono", "Fira Code", monospace;
}

.error-title {
  font-size: 26px;
  margin-bottom: var(--space-2);
}

.error-lead {
  font-size: var(--text-lead);
  color: var(--color-text-soft);
  margin-bottom: var(--space-2);
}

.error-text {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: var(--space-4);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.error-more {
  font-size: 14px;
  color: var(--color-text-soft);
}

.error-more a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================================
   Responsive
   ============================================================ */

/* 桌面与平板之间 */
@media (max-width: 1024px) {
  :root {
    --container-pad: 24px;
  }

  .elements-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .element-card:nth-child(4),
  .element-card:nth-child(5) {
    grid-column: span 1;
  }

  .term-item {
    grid-template-columns: 200px 1fr;
  }
}

/* 平板竖屏与手机横屏之间 */
@media (max-width: 960px) {
  :root {
    --space-6: 48px;
    --space-5: 40px;
    --space-4: 28px;
  }

  .intro-position {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .intro-directory {
    max-width: 640px;
  }

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

  .crossword-row {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .crossword-genre .crossword-figure {
    order: 0;
  }

  .crossword-genre .crossword-copy {
    order: 1;
  }

  .watch-timing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .watch-timing-item {
    padding: var(--space-2);
  }

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

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .comparison-notes {
    grid-template-columns: 1fr;
  }

  .tag-combination-demo {
    grid-template-columns: 1fr;
  }

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

  .example-layout {
    grid-template-columns: 1fr;
  }

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

  .signal-compare {
    grid-template-columns: 1fr;
  }

  .confirm-row {
    grid-template-columns: 1fr;
  }

  .term-relation-content {
    grid-template-columns: 1fr;
  }

  .boundary-intro {
    grid-template-columns: 1fr;
  }

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

/* 手机端 */
@media (max-width: 768px) {
  :root {
    --container-pad: 20px;
    --text-body: 15px;
    --header-h: 60px;
  }

  /* 导航切换 */
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0;
    z-index: 100;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    padding: 12px 24px;
    border-radius: 0;
    font-size: 15px;
  }

  .site-header {
    position: relative;
  }

  .site-nav {
    position: static;
  }

  .header-inner {
    height: var(--header-h);
  }

  .site-main {
    padding: 0 var(--container-pad);
  }

  .inner-main {
    padding-top: var(--space-3);
    padding-bottom: var(--space-5);
  }

  .page-header {
    margin-bottom: var(--space-4);
  }

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

  .page-lead,
  .page-intro {
    font-size: 15px;
  }

  /* 首页 */
  .intro-position {
    padding: var(--space-4) 0;
  }

  .intro-copy h1 {
    font-size: 28px;
  }

  .intro-lead {
    font-size: 16px;
  }

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

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

  .entry-cell {
    padding: var(--space-2) var(--space-3);
  }

  .crossword-row {
    padding: var(--space-4) 0;
  }

  .watch-timing-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .watch-timing-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
  }

  .watch-timing-item .timing-number {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .watch-timing-item h3 {
    margin-bottom: 2px;
  }

  .watch-band .band-link {
    margin-top: var(--space-3);
  }

  .terms-boundary-band {
    padding: var(--space-4) 0;
  }

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

  .faq-fold {
    padding: var(--space-4) 0;
  }

  /* 频道全景 */
  .channel-item {
    grid-template-columns: 36px 1fr;
    gap: 8px;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .comparison-figure + .comparison-figure {
    margin-top: var(--space-2);
  }

  /* 题材标签 */
  .tag-items {
    grid-template-columns: 1fr;
  }

  .diff-pair {
    grid-template-columns: 1fr;
  }

  .diff-item + .diff-item {
    border-left: none;
    border-top: 1px solid var(--color-line-soft);
  }

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

  /* 片单构成 */
  .elements-grid {
    grid-template-columns: 1fr;
  }

  .step-item {
    padding-left: 52px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 15px;
  }

  .example-layout {
    padding: var(--space-3);
  }

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

  /* 观看核验 */
  .timing-grid {
    grid-template-columns: 1fr;
  }

  .signal-compare {
    grid-template-columns: 1fr;
  }

  .confirm-row {
    grid-template-columns: 1fr;
  }

  .step-head {
    align-items: flex-start;
  }

  .step-detail {
    padding-left: 44px;
  }

  /* 名词手册 */
  .term-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

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

  .term-relation-content {
    grid-template-columns: 1fr;
  }

  .relation-chain li {
    padding-left: 40px;
  }

  /* 边界 */
  .boundary-intro {
    grid-template-columns: 1fr;
  }

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

  .feedback-steps li {
    padding-left: 48px;
  }

  .feedback-steps .step-number {
    width: 32px;
    height: 32px;
  }

  .not-included-list li {
    gap: var(--space-2);
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding-top: var(--space-4);
    padding-bottom: var(--space-3);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    padding: 16px var(--container-pad);
  }

  /* 404 */
  .error-main {
    padding: var(--space-5) var(--container-pad);
  }

  .error-code {
    font-size: 56px;
  }

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

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

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

/* 小屏手机 */
@media (max-width: 480px) {
  :root {
    --container-pad: 16px;
  }

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

  .brand-mark::before {
    width: 7px;
    height: 7px;
    margin-right: 6px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 16px;
  }

  .intro-copy h1 {
    font-size: 24px;
  }

  .entry-cell {
    padding: var(--space-2);
  }

  .crossword-copy p {
    font-size: 14px;
  }

  .section-heading {
    flex-direction: column;
    gap: 4px;
  }

  .section-index {
    font-size: 13px;
  }

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

  .extended-link-items {
    flex-direction: column;
    width: 100%;
  }

  .extended-link-items a {
    width: 100%;
    text-align: center;
  }

  .related-links {
    flex-direction: column;
    width: 100%;
  }

  .related-links li a,
  .related-links a {
    width: 100%;
    text-align: center;
  }

  .term-item {
    grid-template-columns: 1fr;
  }
}

/* 尊重减少动态偏好 */
@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;
  }
}