/* ==========================================================================
   番茄影视 · guozhuangyun.com
   视频内容导航与专题说明站 · 新粗野风编辑台
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base — 变量、重置、排版基础
   -------------------------------------------------------------------------- */
:root {
  --paper: #F3EFE6;
  --ink: #151515;
  --signal: #C8402C;
  --highlight: #E8C84A;
  --cool: #CBC5B8;
  --pine: #1E3A32;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shell: 1120px;
  --body-measure: 68ch;
  --aside-w: 240px;
  --gap: 48px;

  --border-hard: 2px solid var(--ink);
  --border-thin: 1px solid var(--cool);
  --radius: 6px;
}

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

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

body.site-body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

figure {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  font-weight: 900;
  line-height: 1.25;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.08;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
}

h4 {
  font-size: 1rem;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

a {
  color: var(--ink);
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

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

button {
  font-family: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}

.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;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
  border-radius: var(--radius);
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

/* --------------------------------------------------------------------------
   2. layout — 页头 / 主容器 / 内页骨架 / 页脚
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: var(--border-hard);
}

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

.brand {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: normal;
  padding: 4px 10px 4px 0;
  border-right: 3px solid var(--signal);
  flex: 0 0 auto;
}

.brand:hover {
  color: var(--signal);
}

.primary-nav .nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 10px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--signal);
  border-bottom-color: var(--cool);
}

.nav-link.is-current {
  color: var(--signal);
  border-bottom-color: var(--signal);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 12px;
  background: var(--paper);
  border: var(--border-hard);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
}

.site-main {
  display: block;
}

.home-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 28px 24px 72px;
}

/* 内页统一骨架：面包屑 + 页标题 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--cool);
}

.breadcrumb a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

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

.breadcrumb-current {
  color: #55524b;
  font-weight: 500;
}

.page-header {
  margin-bottom: 22px;
}

.page-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.08;
  font-weight: 900;
  color: var(--ink);
  margin: 0;
}

/* 通用两栏（主内容 + 侧栏），主内容在前 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-w);
  gap: var(--gap);
  align-items: start;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-w);
  gap: var(--gap);
  align-items: start;
}

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

/* --------------------------------------------------------------------------
   3. components — 通用组件
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  text-decoration: none;
  border: var(--border-hard);
  border-radius: var(--radius);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn-primary {
  background: var(--signal);
  color: #fff;
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-primary:hover {
  color: #fff;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--cool);
}

.btn-ghost:hover {
  color: var(--signal);
  border-color: var(--signal);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

/* 区块标题组 */
.section-head {
  margin-bottom: 22px;
}

.section-title {
  margin: 0 0 8px;
  padding-left: 14px;
  border-left: 8px solid var(--signal);
}

.section-desc,
.section-lead,
.section-intro {
  margin: 0;
  max-width: var(--body-measure);
  color: #3a3733;
  font-size: 1rem;
}

.section-kicker,
.section-tag,
.eyebrow,
.hero-eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: normal;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--highlight);
  border: 1px solid var(--ink);
  border-radius: 2px;
}

.section-more {
  margin: 18px 0 0;
}

.text-link,
.inline-link {
  display: inline-block;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--signal);
}

.text-link:hover,
.inline-link:hover {
  color: var(--signal);
  border-bottom-color: var(--ink);
}

/* 图片容器统一 */
figure img,
.title-media img,
.hero-media img,
.feature-media img,
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: var(--border-hard);
  border-radius: var(--radius);
  background: var(--cool);
}

figcaption {
  margin-top: 10px;
  font-size: 0.85rem;
  line-height: 1.55;
  color: #4a463f;
  font-family: var(--font-mono);
}

/* 表格 */
.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: var(--border-hard);
  border-radius: var(--radius);
  background: #fff;
}

.channel-table,
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 640px;
}

.channel-table th,
.channel-table td,
.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--cool);
}

.channel-table thead th,
.data-table thead th {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: normal;
  white-space: nowrap;
}

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

.channel-table tbody tr:hover,
.data-table tbody tr:hover {
  background: #fbf8f0;
}

.col-num,
.row-index {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
  width: 56px;
  white-space: nowrap;
}

.col-name {
  font-weight: 700;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #4a463f;
  border-bottom: 1px solid var(--cool);
}

.table-note,
.boundary-note,
.result-note,
.update-link {
  margin: 14px 0 0;
  font-size: 0.95rem;
  color: #3a3733;
}

.table-note a,
.boundary-note a,
.result-note a,
.update-link a {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 2px solid var(--signal);
  text-decoration: none;
  margin-right: 12px;
}

.table-note a:hover,
.boundary-note a:hover,
.result-note a:hover,
.update-link a:hover {
  color: var(--signal);
}

/* 阅读任务条 */
.reading-task,
.task-bar,
.reading-tasks,
.task-bar {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  border-top: var(--border-hard);
  padding-top: 14px;
}

.reading-task .task-item,
.task-bar .task-item,
.reading-tasks li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  background: #fff;
  border: var(--border-thin);
  border-left: 4px solid var(--highlight);
  border-radius: 2px;
  min-width: 0;
}

.task-label,
.task-key,
.task-bar dt {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--signal);
  letter-spacing: normal;
}

.task-text,
.task-bar dd,
.reading-task .task-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink);
}

/* 页面标题区（内页统一） */
.page-title {
  display: block;
}

section.page-title {
  margin: 0 0 40px;
  padding: 0 0 28px;
  border-bottom: var(--border-hard);
}

.page-title-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 36px;
  align-items: start;
}

.title-copy {
  min-width: 0;
}

.title-goal {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #2c2a26;
  max-width: var(--body-measure);
  margin: 0 0 6px;
}

.title-media {
  min-width: 0;
}

.title-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
}

/* 侧栏 / 主题目录 */
.aside-toc,
.aside-related,
.page-aside {
  position: sticky;
  top: 96px;
  align-self: start;
  padding: 18px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.aside-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.toc-list,
.toc-nav .toc-list,
.aside-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-list a,
.aside-links a {
  display: block;
  padding: 8px 6px;
  font-size: 0.92rem;
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid transparent;
}

.toc-list a:hover,
.aside-links a:hover {
  color: var(--signal);
  border-left-color: var(--signal);
  background: #fbf8f0;
}

.aside-related {
  margin-top: 20px;
}

.aside-related h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.aside-related ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aside-related a {
  display: block;
  padding: 8px 6px;
  font-size: 0.92rem;
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid transparent;
}

.aside-related a:hover {
  color: var(--signal);
  border-left-color: var(--signal);
  background: #fbf8f0;
}

/* FAQ 折叠 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  padding: 0;
}

.faq-item summary,
.faq-question {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 700;
  font-size: 1.02rem;
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-item summary::after,
.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--signal);
}

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

.faq-answer,
.faq-body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--cool);
  margin-top: 0;
  padding-top: 14px;
}

.faq-answer p,
.faq-body p {
  margin: 0 0 10px;
  font-size: 0.97rem;
}

.faq-answer p:last-child,
.faq-body p:last-child {
  margin-bottom: 0;
}

/* 页脚 */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr);
  gap: 40px;
  align-items: start;
}

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

.footer-name {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--paper);
  padding-left: 12px;
  border-left: 6px solid var(--signal);
}

.footer-slogan {
  margin: 0;
  color: #d8d2c4;
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 26ch;
}

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

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

.footer-group-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--highlight);
  letter-spacing: normal;
}

.footer-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-group a {
  display: inline-block;
  padding: 4px 0;
  color: #e7e1d4;
  text-decoration: none;
  font-size: 0.92rem;
  border-bottom: 1px solid transparent;
}

.footer-group a:hover {
  color: var(--highlight);
  border-bottom-color: var(--highlight);
}

.footer-bottom {
  border-top: 1px solid #3a3a3a;
}

.footer-bottom p {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px;
  font-size: 0.85rem;
  color: #b7b1a4;
}

/* 离线提示条 */
.offline-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  padding: 12px 20px;
  background: var(--pine);
  color: var(--paper);
  font-size: 0.9rem;
  text-align: center;
  border-top: 2px solid var(--highlight);
}

.offline-bar[hidden] {
  display: none;
}

/* --------------------------------------------------------------------------
   4. pages — 首页
   -------------------------------------------------------------------------- */
.hero-editorial {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  padding: 48px 0 40px;
  border-bottom: var(--border-hard);
  align-items: start;
}

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

.hero-copy h1 {
  margin: 0 0 20px;
  max-width: 18ch;
}

.hero-lead {
  font-size: 1.08rem;
  line-height: 1.7;
  color: #2c2a26;
  max-width: 52ch;
  margin: 0 0 26px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

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

.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
}

.hero-caption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 4px solid var(--signal);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #4a463f;
  font-family: var(--font-mono);
}

/* 频道标签条 */
.channel-tabs {
  padding: 32px 0 12px;
  border-bottom: var(--border-hard);
}

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

.channel-tab-scroll {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 40px 14px 0;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  position: relative;
  mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 60px), transparent 100%);
  -webkit-mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 60px), transparent 100%);
}

.channel-tab {
  flex: 0 0 auto;
  display: inline-block;
  padding: 10px 18px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

.channel-tab:hover {
  background: var(--highlight);
  color: var(--ink);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}

/* 频道谱系索引表 */
.channel-index {
  padding: 40px 0;
  border-bottom: var(--border-hard);
}

/* 片单策展台 */
.curated-feature {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 40px;
  padding: 40px 0;
  border-bottom: var(--border-hard);
  align-items: start;
}

.feature-media {
  min-width: 0;
}

.feature-media img {
  width: 100%;
  aspect-ratio: 3 / 4;
  height: auto;
}

.feature-list {
  min-width: 0;
}

.feature-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--cool);
}

.feature-item:first-of-type {
  border-top: var(--border-hard);
}

.feature-name {
  margin: 0 0 6px;
  font-size: 1.2rem;
}

.feature-name a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--signal);
}

.feature-name a:hover {
  color: var(--signal);
}

.feature-scene,
.feature-order {
  margin: 0 0 4px;
  font-size: 0.92rem;
  color: #3a3733;
}

.feature-scene::before {
  content: "场景 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
}

.feature-order::before {
  content: "顺序 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
}

/* 观看场景三段 */
.viewing-context-grid {
  padding: 40px 0;
  border-bottom: var(--border-hard);
}

.context-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.context-card {
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.context-name {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.context-method,
.context-note {
  margin: 0 0 8px;
  font-size: 0.94rem;
  color: #2c2a26;
}

.context-note::before {
  content: "注意 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
}

/* 浏览流程四步 */
.browse-flow-steps {
  padding: 40px 0;
  border-bottom: var(--border-hard);
}

.flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: flow;
}

.flow-step {
  position: relative;
  padding: 18px 16px 16px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.flow-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--highlight);
  border: 1px solid var(--ink);
  padding: 2px 8px;
  margin-bottom: 10px;
  border-radius: 2px;
}

.flow-name {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.flow-check {
  margin: 0;
  font-size: 0.9rem;
  color: #3a3733;
}

.flow-check::before {
  content: "检查 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
}

/* 标注规范摘要 */
.label-summary {
  padding: 40px 0;
  border-bottom: var(--border-hard);
}

.label-clause-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.label-clause {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 2fr);
  gap: 20px;
  padding: 16px 18px;
  background: #fff;
  border: var(--border-hard);
  border-left: 8px solid var(--signal);
  border-radius: var(--radius);
  align-items: start;
}

.clause-title {
  margin: 0;
  font-size: 1.05rem;
}

.clause-text {
  margin: 0;
  font-size: 0.95rem;
  color: #2c2a26;
}

/* 内容观察摘要 */
.content-notes-summary {
  padding: 40px 0;
  border-bottom: var(--border-hard);
}

.content-notes-summary .section-title {
  margin-bottom: 20px;
}

.notes-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.note-lead,
.note-item {
  background: var(--pine);
  color: var(--paper);
  padding: 22px;
  border-radius: var(--radius);
  border: var(--border-hard);
  min-width: 0;
}

.note-lead .note-title,
.note-item .note-title {
  color: var(--highlight);
  margin: 0 0 10px;
}

.note-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #e7e1d4;
}

.note-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.note-list .section-more {
  margin: 0;
}

.note-list .text-link {
  color: var(--paper);
  border-bottom-color: var(--highlight);
}

.note-list .text-link:hover {
  color: var(--highlight);
}

/* 问答摘选 */
.faq-preview {
  padding: 40px 0 0;
}

/* --------------------------------------------------------------------------
   4. pages — 频道谱系 channel-map
   -------------------------------------------------------------------------- */
.channel-table,
.channel-boundary,
.channel-playlist-map {
  padding: 0 0 40px;
  margin-bottom: 40px;
  border-bottom: var(--border-hard);
}

.channel-boundary:last-of-type,
.channel-playlist-map:last-of-type {
  border-bottom: 0;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.boundary-include,
.boundary-exclude {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.boundary-include {
  border-top: 8px solid var(--pine);
}

.boundary-exclude {
  border-top: 8px solid var(--signal);
}

.boundary-include h3,
.boundary-exclude h3 {
  margin: 0 0 12px;
}

.boundary-list {
  margin: 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.95rem;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.map-card {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.map-card h3 {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.map-card p {
  margin: 0 0 12px;
  font-size: 0.94rem;
}

.map-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.map-links a {
  display: inline-block;
  padding: 6px 0;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--signal);
}

.map-links a:hover {
  color: var(--signal);
}

/* --------------------------------------------------------------------------
   4. pages — 片单策展 curated-lists
   -------------------------------------------------------------------------- */
.curation-principles,
.playlist-entries,
.scene-map {
  padding: 0 0 40px;
  margin-bottom: 40px;
  border-bottom: var(--border-hard);
}

.scene-map {
  border-bottom: 0;
  margin-bottom: 0;
}

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

.principle-card {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.principle-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--signal);
}

.principle-card h3 {
  margin: 0 0 8px;
}

.principle-card p:last-child {
  margin: 0;
  font-size: 0.94rem;
}

.entry {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 2fr) minmax(0, 1.2fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--cool);
  align-items: start;
}

.entry:first-of-type {
  border-top: var(--border-hard);
}

.entry-meta {
  min-width: 0;
}

.entry-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--signal);
}

.entry-tag {
  display: inline-block;
  margin: 0;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--highlight);
  border: 1px solid var(--ink);
  border-radius: 2px;
}

.entry-body {
  min-width: 0;
}

.entry-body h3 {
  margin: 0 0 8px;
}

.entry-body p {
  margin: 0;
  font-size: 0.95rem;
}

.entry-paths {
  min-width: 0;
}

.entry-paths h4 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
}

.entry-paths ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.entry-paths a {
  display: inline-block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--cool);
}

.entry-paths a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.scene-map-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.scene-list,
.list-structure {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.scene-list h3,
.list-structure h3 {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.scene-list ul {
  margin: 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.95rem;
}

.list-structure dl {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.list-structure dt {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--signal);
}

.list-structure dd {
  margin: 0;
  font-size: 0.92rem;
}

.scene-map-more {
  margin: 18px 0 0;
}

/* --------------------------------------------------------------------------
   4. pages — 观看场景 viewing-context
   -------------------------------------------------------------------------- */
.context-cards,
.context-compare,
.context-label-check,
.context-related {
  padding: 0 0 40px;
  margin-bottom: 40px;
  border-bottom: var(--border-hard);
}

.context-related {
  border-bottom: 0;
  margin-bottom: 0;
}

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

.context-body {
  min-width: 0;
}

.context-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
}

.context-body p:not(.context-label) {
  margin: 0 0 10px;
  font-size: 0.94rem;
}

.context-body p:not(.context-label):last-child {
  margin-bottom: 0;
}

.check-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.check-steps,
.check-note {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
  min-width: 0;
}

.check-note {
  background: #fbf8f0;
  border-left: 8px solid var(--pine);
}

.check-title {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.check-steps .step-list {
  margin: 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-name {
  margin: 0 0 2px;
  font-weight: 700;
  font-size: 0.95rem;
}

.check-steps .step-list li p:last-child {
  margin: 0;
  font-size: 0.92rem;
}

.check-note p {
  margin: 0 0 10px;
  font-size: 0.94rem;
}

.check-note p:last-child {
  margin-bottom: 0;
}

.check-note a {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 2px solid var(--signal);
  text-decoration: none;
}

.check-note a:hover {
  color: var(--signal);
}

.related-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.related-list li {
  min-width: 0;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: #fff;
  border: var(--border-thin);
  border-left: 4px solid var(--signal);
  border-radius: var(--radius);
  text-decoration: none;
  height: 100%;
}

.related-card:hover {
  border-color: var(--ink);
  border-left-color: var(--signal);
  background: #fbf8f0;
}

.related-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.related-desc {
  font-size: 0.88rem;
  color: #4a463f;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   4. pages — 浏览流程 browse-flow
   -------------------------------------------------------------------------- */
.flow-steps,
.wrong-paths,
.result-check {
  padding: 0 0 40px;
  margin-bottom: 40px;
  border-bottom: var(--border-hard);
}

.result-check {
  border-bottom: 0;
  margin-bottom: 0;
}

.flow-steps .step-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.flow-steps .step-item {
  padding: 22px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
}

.step-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--cool);
}

.step-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  background: var(--highlight);
  border: 1px solid var(--ink);
  padding: 2px 10px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.step-head h3 {
  margin: 0;
  font-size: 1.2rem;
}

.step-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.step-field {
  min-width: 0;
  padding: 12px 14px;
  background: #fbf8f0;
  border-left: 4px solid var(--signal);
  border-radius: 2px;
}

.step-field p {
  margin: 0;
  font-size: 0.93rem;
}

.step-field p:first-child {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
  margin-bottom: 4px;
}

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

.wrong-item {
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-top: 8px solid var(--signal);
  border-radius: var(--radius);
  min-width: 0;
}

.wrong-item h3 {
  margin: 0 0 10px;
}

.wrong-symptom,
.wrong-fix {
  margin: 0 0 8px;
  font-size: 0.93rem;
}

.wrong-symptom::before {
  content: "表现 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
}

.wrong-fix::before {
  content: "纠正 · ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--pine);
}

.wrong-fix {
  margin-bottom: 0;
}

.checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
}

.check-box {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: var(--border-hard);
  border-radius: 3px;
  background: var(--highlight);
  position: relative;
}

.check-box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 6px;
  height: 12px;
  border-right: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
  transform: rotate(40deg);
}

.check-item p {
  margin: 0;
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   4. pages — 标注规范 label-rules
   -------------------------------------------------------------------------- */
.label-types,
.label-checklist,
.label-misread {
  padding: 0 0 36px;
  margin-bottom: 36px;
  border-bottom: var(--border-hard);
}

.label-misread {
  border-bottom: 0;
  margin-bottom: 0;
}

.label-types h2,
.label-checklist h2,
.label-misread h2 {
  margin-bottom: 8px;
}

.label-types .table-wrap {
  margin-top: 18px;
}

.checklist-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.checklist-columns .checklist {
  margin: 0;
  padding: 20px;
  background: #fff;
  border: var(--border-hard);
  border-radius: var(--radius);
}

.checklist-columns .checklist h3 {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.checklist-list {
  margin: 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.94rem;
}

.example-box {
  padding: 20px;
  background: #fbf8f0;
  border: var(--border-hard);
  border-left: 8px solid var(--pine);
  border-radius: var(--radius);
  min-width: 0;
}

.example-box h3 {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--highlight);
}

.example-box p {
  margin: 0 0 10px;
  font-size: 0.94rem;
}

.example-note {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #4a463f;
  padding-top: 10px;
  border-top: 1px dashed var(--cool);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   4. pages — 内容观察 content-notes
   -------------------------------------------------------------------------- */
.note-section {
  max-width: var(--body-measure);
  margin: 0 0 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--cool);
}

.note-section h2 {
  margin-bottom: 14px;
}

.note-section p {
  font-size: 1.02rem;
}

.note-side {
  margin-top: 16px;
  padding: 14px 18px;
  background: #fbf8f0;
  border-left: 6px solid var(--highlight);
  border-radius: 2px;
}

.note-side p {
  margin: 0;
  font-size: 0.9rem;
  color: #3a3733;
  font-family: var(--font-mono);
  line-height: 1.6;
}

.update-note {
  max-width: var(--body-measure);
  padding: 22px;
  background: var(--pine);
  color: var(--paper);
  border-radius: var(--radius);
  border: var(--border-hard);
}

.update-note h2 {
  color: var(--highlight);
  margin-bottom: 12px;
}

.update-note > p {
  color: #e7e1d4;
  font-size: 0.95rem;
}

.update-rules {
  margin: 0 0 14px;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #e7e1d4;
  font-size: 0.94rem;
}

.update-link {
  margin: 0;
  color: #e7e1d4;
}

.update-link a {
  color: var(--highlight);
  border-bottom-color: var(--highlight);
}

.update-link a:hover {
  color: #fff;
}

/* --------------------------------------------------------------------------
   4. pages — 问答手册 questions
   -------------------------------------------------------------------------- */
.faq-group {
  padding: 0 0 36px;
  margin-bottom: 36px;
  border-bottom: var(--border-hard);
}

.faq-group h2 {
  margin-bottom: 8px;
}

.faq-group .section-intro {
  margin-bottom: 18px;
}

.feedback-block {
  padding: 22px;
  background: #fff;
  border: var(--border-hard);
  border-left: 8px solid var(--signal);
  border-radius: var(--radius);
  max-width: var(--body-measure);
}

.feedback-block h2 {
  margin-bottom: 8px;
}

.feedback-list {
  margin: 18px 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feedback-list li {
  padding: 12px 14px;
  background: #fbf8f0;
  border-left: 4px solid var(--pine);
  border-radius: 2px;
}

.feedback-list h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.feedback-list p {
  margin: 0;
  font-size: 0.93rem;
}

/* --------------------------------------------------------------------------
   4. pages — 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 72px 24px;
}

.error-panel {
  padding: 40px 32px;
  background: #fff;
  border: var(--border-hard);
  border-left: 12px solid var(--signal);
  border-radius: var(--radius);
  margin-bottom: 40px;
}

.error-code {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.error-panel h1 {
  margin: 0 0 16px;
}

.error-lead {
  max-width: var(--body-measure);
  margin: 0 0 26px;
  font-size: 1.05rem;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.error-guide {
  padding: 28px;
  background: #fbf8f0;
  border: var(--border-hard);
  border-radius: var(--radius);
}

.error-guide h2 {
  margin-bottom: 16px;
}

.error-path-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.error-path-list a {
  display: block;
  padding: 12px 16px;
  background: #fff;
  border: var(--border-thin);
  border-left: 4px solid var(--signal);
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
  min-height: 48px;
}

.error-path-list a:hover {
  border-color: var(--ink);
  color: var(--signal);
}

/* --------------------------------------------------------------------------
   5. responsive — 1024 / 720 断点
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .page-layout,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 32px;
  }

  .hero-editorial {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 28px;
  }

  .curated-feature {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 28px;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .footer-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .entry {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 2fr) minmax(0, 1.1fr);
    gap: 18px;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--paper);
    border-bottom: var(--border-hard);
    padding: 12px 24px 20px;
  }

  .primary-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    display: none;
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    min-height: 48px;
    font-size: 1rem;
    border-bottom: 1px solid var(--cool);
  }

  .nav-link.is-current {
    border-bottom-color: var(--signal);
  }

  .header-inner {
    position: relative;
  }
}

@media (max-width: 720px) {
  body.site-body {
    font-size: 16px;
  }

  .header-inner {
    padding: 12px 16px;
    gap: 12px;
  }

  .brand {
    font-size: 1.15rem;
  }

  .home-main,
  .inner-main,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .inner-main {
    padding-top: 20px;
    padding-bottom: 56px;
  }

  .home-main {
    padding-bottom: 56px;
  }

  /* 内页骨架：单列，主内容在前 */
  .page-layout,
  .layout-shell {
    display: block;
  }

  .page-layout > .aside-toc,
  .page-layout > .aside-related,
  .page-layout > .page-aside,
  .layout-shell > .aside-toc {
    position: static;
    margin-top: 32px;
  }

  .page-layout > .page-primary,
  .page-layout > .page-content,
  .page-layout > .content-main,
  .page-layout > .content-column,
  .layout-shell > .page-content {
    margin-bottom: 0;
  }

  /* 标题区两列转单列 */
  .page-title-inner,
  .page-title {
    display: block;
  }

  section.page-title {
    margin-bottom: 28px;
    padding-bottom: 22px;
  }

  .title-media {
    margin-top: 20px;
  }

  .title-media img {
    aspect-ratio: 16 / 10;
  }

  .reading-task,
  .task-bar,
  .reading-tasks,
  .task-bar {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  /* 首页首屏：文案在前，主图在后 */
  .hero-editorial {
    display: block;
    padding: 28px 0 26px;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .hero-media {
    margin-top: 24px;
  }

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

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

  .channel-tab-scroll {
    padding-right: 48px;
  }

  /* 首页片单：图在文前 */
  .curated-feature {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 28px 0;
  }

  .feature-media {
    order: -1;
    width: 100%;
  }

  .feature-media img {
    aspect-ratio: 16 / 10;
  }

  .context-columns,
  .principle-grid,
  .map-grid,
  .context-grid,
  .wrong-grid,
  .boundary-grid,
  .scene-map-grid,
  .related-list,
  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

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

  .check-grid,
  .checklist-columns,
  .scene-map-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    padding: 18px 0;
  }

  .entry-meta {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .entry-num {
    margin: 0;
    font-size: 1.2rem;
  }

  .step-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  /* 表格转条目式：保留横向滚动兜底，同时允许内容换行 */
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .channel-table,
  .data-table {
    min-width: 560px;
  }

  .channel-table th,
  .channel-table td,
  .data-table th,
  .data-table td {
    padding: 10px 12px;
    font-size: 0.9rem;
  }

  .footer-inner {
    padding: 36px 16px 24px;
    gap: 24px;
  }

  .footer-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .footer-bottom p {
    padding: 16px;
    font-size: 0.8rem;
  }

  .error-panel {
    padding: 28px 20px;
  }

  .error-code {
    font-size: 2.4rem;
  }

  .error-guide {
    padding: 20px;
  }

  .faq-item summary,
  .faq-question {
    padding: 14px 44px 14px 14px;
    font-size: 0.98rem;
  }

  .faq-answer,
  .faq-body {
    padding: 12px 14px 14px;
  }

  .context-card,
  .principle-card,
  .map-card,
  .wrong-item,
  .check-steps,
  .check-note,
  .example-box,
  .update-note,
  .feedback-block {
    padding: 16px;
  }

  .flow-steps .step-item {
    padding: 16px;
  }

  .step-head {
    gap: 10px;
  }
}

@media (max-width: 400px) {
  .brand {
    font-size: 1.05rem;
  }

  .channel-table,
  .data-table {
    min-width: 520px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .btn:hover,
  .channel-tab:hover {
    transform: none;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}