/* ==========================================================================
   bisaipai.com · 台北娜娜51吃瓜 全站样式表
   手工艺目录风：纸本色底 + 墨绿 + 陶土，细线框与编号徽标
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   1. base — 变量、重置、排版基础
   ========================================================================== */

:root {
  --paper: #F4F0E7;
  --panel: #FBF9F4;
  --ink-green: #2E4A41;
  --clay: #B4633C;
  --gray-green: #6E7C74;
  --ink: #22201C;
  --line: #DCD5C7;
  --line-strong: #C6BCA8;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --shell: 1200px;
  --side-w: 190px;
  --toc-w: 170px;
  --gap: 32px;
  --radius: 6px;
  --radius-sm: 4px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0;
}

ul, ol, dl, dd {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

a {
  color: var(--ink-green);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

time,
code,
.entry-badge,
.code-badge,
.index-badge,
.index-code,
.workflow-num,
.step-num,
.record-count,
.timeline-code,
.update-code,
.cell-code,
.update-date {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.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;
}

/* ==========================================================================
   2. layout — 页面骨架：页头 / 主容器 / 侧栏 / 页脚
   ========================================================================== */

/* ---- 页头 ---- */

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

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

.brand {
  flex: 0 0 auto;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink-green);
  letter-spacing: .04em;
  padding: 6px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--paper);
}

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

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 2px;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--ink-green);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

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

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

.menu-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink-green);
}

.mobile-nav {
  border-top: 1px solid var(--line);
  background-color: var(--panel);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-list {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px 16px 14px;
}

.mobile-nav-list li + li {
  border-top: 1px solid var(--line);
}

.mobile-nav-list a {
  display: block;
  padding: 12px 8px;
  font-size: 16px;
  min-height: 44px;
}

/* ---- 布局外壳 ---- */

.page-layout {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 28px 24px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

/* 侧栏在前的页面：aside 先写，main 后写 */
.page-layout.sidebar-left {
  grid-template-columns: var(--side-w) minmax(0, 1fr);
}

/* 侧栏在前 + 右侧锚点目录 */
.page-layout.sidebar-left:has(.page-toc) {
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w);
}

/* 侧栏在后的页面（aside 位于 main 之后） */
.page-layout:not(.sidebar-left) {
  grid-template-columns: minmax(0, 1fr) var(--side-w);
}

.page-layout:not(.sidebar-left):has(.page-toc) {
  grid-template-columns: minmax(0, 1fr) var(--side-w) var(--toc-w);
}

/* 祖先带 .sidebar-left 时同样让左侧栏优先 */
.sidebar-left .page-layout {
  grid-template-columns: var(--side-w) minmax(0, 1fr);
}

.sidebar-left .page-layout:has(.page-toc) {
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w);
}

.site-main {
  min-width: 0;
  max-width: 100%;
}

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

/* ---- 页脚 ---- */

.site-footer {
  background-color: var(--panel);
  border-top: 1px solid var(--line);
  margin-top: 8px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 36px 24px 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1.6fr);
  gap: 28px 32px;
}

.footer-title {
  font-size: 15px;
  color: var(--ink-green);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.footer-links li + li {
  margin-top: 6px;
}

.footer-links a {
  font-size: 14px;
  color: var(--gray-green);
}

.footer-links a:hover {
  color: var(--clay);
}

.footer-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray-green);
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: baseline;
}

.footer-brand {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-green);
  letter-spacing: .04em;
}

.footer-slogan {
  font-size: 13px;
  color: var(--gray-green);
}

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

/* ---- 按钮 ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--ink-green);
  color: var(--panel);
  border-color: var(--ink-green);
}

.btn-primary:hover {
  background-color: var(--clay);
  border-color: var(--clay);
  color: #fff;
}

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

.btn-ghost:hover {
  border-color: var(--clay);
  color: var(--clay);
}

.text-link {
  font-size: 14px;
  color: var(--clay);
  border-bottom: 1px solid rgba(180, 99, 60, .45);
  padding-bottom: 2px;
}

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

.entry-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--clay);
  border-bottom: 1px solid rgba(180, 99, 60, .45);
}

.entry-link:hover {
  color: var(--ink-green);
  border-bottom-color: var(--ink-green);
}

/* ---- 编号徽标 ---- */

.code-badge,
.index-badge,
.entry-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-green);
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.entry-badge {
  font-size: 13px;
  padding: 4px 10px;
}

/* ---- 面包屑 ---- */

.breadcrumb {
  font-size: 13px;
  color: var(--gray-green);
  margin-bottom: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb a {
  color: var(--gray-green);
}

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

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

.breadcrumb-current {
  color: var(--ink-green);
  font-weight: 700;
}

/* ---- 页面标题区 ---- */

.page-header {
  margin-bottom: 14px;
}

.page-title {
  font-size: 32px;
  color: var(--ink-green);
  letter-spacing: .01em;
}

.page-title-block,
.page-head {
  margin-bottom: 30px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-label,
.page-tag,
.section-tag,
.section-label {
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--clay);
  margin-bottom: 8px;
}

.page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-green);
  max-width: 40em;
}

/* ---- 区块通用 ---- */

.section,
.section-block,
.topics-overview,
.topic-grid-section,
.topic-structure,
.archive-crossref,
.related-entries,
.observation-list,
.method-block,
.related-entry,
.update-table-section,
.update-timeline,
.update-note,
.update-related,
.guide-faq,
.guide-diagram,
.guide-scope,
.about-position,
.about-workflow,
.about-principles,
.about-boundary {
  margin-bottom: 44px;
}

.section-head {
  margin-bottom: 18px;
}

.section-head h2,
.section h2,
.section-block h2,
.topics-overview h2,
.topic-grid-section h2,
.topic-structure h2,
.archive-crossref h2,
.related-entries h2,
.observation-list h2,
.method-block h2,
.related-entry h2,
.update-table-section h2,
.update-timeline h2,
.update-note h2,
.update-related h2,
.guide-faq h2,
.guide-diagram h2,
.guide-scope h2,
.about-position h2,
.about-workflow h2,
.about-principles h2,
.about-boundary h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-note,
.section-desc,
.section-intro {
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-green);
  max-width: 42em;
}

.section-more {
  margin-top: 14px;
}

.sub-title {
  font-size: 17px;
  margin-bottom: 12px;
}

/* ---- 横向滚动容器 ---- */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  scrollbar-width: thin;
}

.table-scroll::-webkit-scrollbar {
  height: 8px;
}

.table-scroll::-webkit-scrollbar-thumb {
  background-color: var(--line-strong);
  border-radius: 4px;
}

/* ---- 数据表 ---- */

.data-table,
.entry-table {
  width: 100%;
  min-width: 640px;
  font-size: 14px;
}

.data-table caption,
.table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px 6px;
  font-size: 13px;
  color: var(--gray-green);
}

.data-table th,
.data-table td,
.entry-table th,
.entry-table td {
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table thead th,
.entry-table thead th {
  background-color: var(--paper);
  color: var(--ink-green);
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-strong);
}

.data-table tbody tr:last-child td,
.entry-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover,
.entry-table tbody tr:hover {
  background-color: rgba(46, 74, 65, .04);
}

.cell-code {
  font-size: 13px;
  color: var(--ink-green);
  letter-spacing: .04em;
}

/* ---- 状态标签 ---- */

.status-tag {
  display: inline-block;
  padding: 1px 8px;
  font-size: 12px;
  color: var(--gray-green);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.status-tag-new {
  color: var(--clay);
  border-color: rgba(180, 99, 60, .5);
}

/* ---- figure / 图片约束 ---- */

.hero-figure,
.card-figure,
.character-figure,
.topic-media,
.card-media,
.media-figure,
.page-figure,
.diagram-figure,
.about-position-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
}

.hero-figure img,
.card-figure img,
.character-figure img,
.topic-media img,
.card-media img,
.media-figure img,
.page-figure img,
.diagram-figure img,
.about-position-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

figcaption {
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-green);
  border-top: 1px solid var(--line);
}

/* ---- 本页锚点目录 ---- */

.page-toc {
  position: sticky;
  top: 84px;
  align-self: start;
  padding: 16px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc-title,
.page-toc-title {
  font-size: 14px;
  color: var(--ink-green);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.toc-list,
.page-toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-list a,
.toc-link,
.page-toc-list a {
  display: block;
  padding: 7px 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-green);
  border-left: 2px solid transparent;
}

.toc-list a:hover,
.toc-link:hover,
.page-toc-list a:hover,
.toc-list a.is-active,
.toc-link.is-active {
  color: var(--ink-green);
  border-left-color: var(--clay);
  background-color: var(--paper);
}

/* ---- 侧栏通用（内页左栏） ---- */

.side-index,
.sidebar-left-col,
.left-sidebar,
.record-index {
  position: sticky;
  top: 84px;
  align-self: start;
  padding: 16px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
}

.side-index-title,
.side-title,
.sidebar-title,
.aside-title,
.index-panel-title {
  font-size: 14px;
  color: var(--ink-green);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.side-index-title:not(:first-child),
.side-title:not(:first-child),
.index-panel-title:not(:first-child) {
  margin-top: 18px;
}

.sidebar-note,
.aside-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-green);
  margin-bottom: 12px;
}

.side-index-group,
.sidebar-group,
.side-group {
  margin-bottom: 16px;
}

.side-index-group:last-child,
.sidebar-group:last-child,
.side-group:last-child {
  margin-bottom: 0;
}

.side-index-heading,
.sidebar-group-title,
.side-group-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--clay);
  letter-spacing: .06em;
  margin-bottom: 8px;
}

.side-index-list li + li,
.sidebar-list li + li,
.side-list li + li,
.side-sublist li + li {
  margin-top: 4px;
}

.side-index-list a,
.sidebar-list a,
.side-list a,
.side-sublist a {
  display: block;
  padding: 6px 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-green);
  border-left: 2px solid transparent;
}

.side-index-list a:hover,
.sidebar-list a:hover,
.side-list a:hover,
.side-sublist a:hover {
  color: var(--ink-green);
  border-left-color: var(--clay);
  background-color: var(--paper);
}

.side-list > li {
  margin-top: 8px;
}

.side-sublist {
  margin-top: 4px;
  padding-left: 8px;
  border-left: 1px solid var(--line);
}

.sidebar-entry {
  display: block;
  margin-top: 10px;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--clay);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  text-align: center;
}

.sidebar-entry:hover {
  border-color: var(--clay);
  color: var(--ink-green);
}

/* ---- 记录目录（最新资讯） ---- */

.record-index-nav {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.record-index-item + .record-index-item {
  margin-top: 4px;
}

.record-index-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 8px;
  font-size: 13px;
  color: var(--gray-green);
  border-left: 2px solid transparent;
}

.record-index-item a:hover {
  color: var(--ink-green);
  border-left-color: var(--clay);
  background-color: var(--paper);
}

.record-count {
  font-size: 12px;
  color: var(--clay);
}

/* ---- 折叠问答 ---- */

.faq-group {
  margin-bottom: 26px;
}

.faq-group-title {
  font-size: 17px;
  color: var(--ink-green);
  margin-bottom: 10px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  margin-bottom: 8px;
}

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

.faq-question {
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-green);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--clay);
}

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

.faq-question:hover {
  color: var(--clay);
}

.faq-answer {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
}

.faq-answer p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ==========================================================================
   4. pages — 首页与各内页模块
   ========================================================================== */

/* ---- 首页：左侧主题索引栏 ---- */

.index-panel {
  display: block;
}

.topic-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 4px;
}

.topic-tag {
  display: inline-block;
  padding: 5px 10px;
  font-size: 13px;
  color: var(--ink-green);
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.topic-tag:hover {
  color: #fff;
  background-color: var(--clay);
  border-color: var(--clay);
}

.archive-range-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.archive-range-link {
  display: block;
  padding: 6px 8px;
  font-size: 13px;
  color: var(--gray-green);
  border-left: 2px solid transparent;
}

.archive-range-link:hover {
  color: var(--ink-green);
  border-left-color: var(--clay);
  background-color: var(--paper);
}

/* ---- 首页：首屏索引区 ---- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding-bottom: 32px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

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

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--clay);
  margin-bottom: 10px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.25;
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--gray-green);
  max-width: 36em;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

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

.hero-fact dt {
  font-size: 13px;
  color: var(--gray-green);
  margin-bottom: 4px;
}

.hero-fact dd {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-green);
}

.hero-figure {
  margin: 0;
}

/* ---- 首页：主题索引面板 ---- */

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

.topic-words,
.topic-flow {
  min-width: 0;
  padding: 20px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-word-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.topic-word-list li {
  padding: 6px 12px;
  font-size: 14px;
  color: var(--ink-green);
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.flow-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.flow-step {
  display: flex;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  padding-left: 0;
}

.flow-step::before {
  content: counter(flow);
  counter-increment: flow;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #fff;
  background-color: var(--ink-green);
  border-radius: var(--radius-sm);
}

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

.flow-step::before {
  margin-top: 2px;
}

/* ---- 首页：更新资讯速览 ---- */

.update-line-list {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  overflow: hidden;
}

.update-line {
  display: grid;
  grid-template-columns: 110px 96px 120px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

.update-line:last-child {
  border-bottom: none;
}

.update-line:hover {
  background-color: rgba(46, 74, 65, .04);
}

.update-date {
  font-size: 13px;
  color: var(--gray-green);
}

.update-type {
  font-size: 13px;
  color: var(--clay);
}

.update-code {
  font-size: 13px;
  color: var(--ink-green);
}

.update-topic {
  font-size: 14px;
  color: var(--ink-green);
  min-width: 0;
}

.update-topic:hover {
  color: var(--clay);
}

/* ---- 首页：作品专题三栏 ---- */

.topic-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.topic-card {
  display: flex;
  flex-direction: column;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .18s ease, box-shadow .18s ease;
}

.topic-card:hover {
  border-color: var(--ink-green);
  box-shadow: 0 2px 10px rgba(46, 74, 65, .08);
}

.topic-card .card-figure {
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}

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

.card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.card-body .code-badge {
  align-self: flex-start;
}

.card-title {
  font-size: 17px;
  line-height: 1.5;
}

.card-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.card-meta {
  font-size: 13px;
  color: var(--gray-green);
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

/* ---- 首页：角色观察双栏 ---- */

.character-row {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.character-row:last-of-type {
  border-bottom: none;
}

.character-row.media-right {
  grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
}

.character-row.media-right .character-body {
  order: 1;
}

.character-row.media-right .character-figure {
  order: 2;
}

.character-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.character-name {
  font-size: 18px;
}

.character-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.character-meta {
  font-size: 13px;
  color: var(--gray-green);
}

/* ---- 首页：条目速览表 ---- */

.entry-table-section .table-scroll {
  margin-top: 4px;
}

/* ---- 首页：内容归档编号分区 ---- */

.zone-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.zone-card {
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color .18s ease;
}

.zone-card:hover {
  border-color: var(--ink-green);
}

.zone-card .code-badge {
  align-self: flex-start;
}

.zone-title {
  font-size: 16px;
  line-height: 1.5;
}

.zone-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.zone-meta {
  font-size: 13px;
  color: var(--gray-green);
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

/* ---- 首页：阅读说明与站点边界双栏 ---- */

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

.guide-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-col h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.step-num {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  background-color: var(--ink-green);
  border-radius: var(--radius-sm);
  margin-top: 3px;
}

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

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

.plain-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background-color: var(--clay);
  border-radius: 1px;
}

/* ---- 作品专题页 ---- */

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

.group-panel {
  min-width: 0;
  padding: 20px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.group-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.group-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
  margin-bottom: 12px;
}

.group-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.group-list li {
  font-size: 14px;
  color: var(--ink);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 18px;
}

.topic-grid .topic-card {
  display: flex;
  flex-direction: column;
}

.topic-media {
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}

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

.topic-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.topic-body .index-badge {
  align-self: flex-start;
}

.topic-name {
  font-size: 17px;
  line-height: 1.5;
}

.topic-scope {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.topic-fields {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
}

.topic-fields dt {
  color: var(--gray-green);
  white-space: nowrap;
}

.topic-fields dd {
  color: var(--ink);
  min-width: 0;
}

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

.structure-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.structure-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.structure-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.crossref-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.crossref-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--ink-green);
  background-color: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.crossref-list a:hover {
  color: var(--clay);
  border-color: var(--clay);
}

.index-code {
  font-size: 12px;
  color: var(--clay);
}

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

.related-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.related-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

/* ---- 角色观察页 ---- */

.page-media {
  margin-bottom: 36px;
}

.media-figure img {
  aspect-ratio: 21 / 9;
}

.observation-card {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.observation-card:last-of-type {
  border-bottom: none;
}

.observation-card.card-reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 280px);
}

.observation-card.card-reverse .card-media {
  order: 2;
}

.observation-card.card-reverse .card-body {
  order: 1;
}

.card-media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card-media img {
  aspect-ratio: 4 / 3;
}

.observation-card .card-body {
  padding: 0;
  background-color: transparent;
}

.observation-card .card-title {
  font-size: 18px;
}

.observation-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: none;
  padding-top: 0;
}

.card-point {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.card-fields {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}

.card-fields dt {
  color: var(--gray-green);
  white-space: nowrap;
}

.card-fields dd {
  color: var(--ink);
  min-width: 0;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.method-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.method-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

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

.related-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-col h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.related-col p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

/* ---- 最新资讯页 ---- */

.page-figure {
  margin-bottom: 36px;
}

.page-figure img {
  aspect-ratio: 21 / 9;
}

.timeline-group {
  margin-top: 26px;
}

.timeline-date {
  font-size: 16px;
  color: var(--ink-green);
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.timeline-list {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  overflow: hidden;
}

.timeline-row {
  display: grid;
  grid-template-columns: 96px 130px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

.timeline-row:last-child {
  border-bottom: none;
}

.timeline-row:hover {
  background-color: rgba(46, 74, 65, .04);
}

.timeline-type {
  font-size: 13px;
  color: var(--clay);
}

.timeline-code {
  font-size: 13px;
  color: var(--ink-green);
}

.timeline-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  min-width: 0;
}

.note-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.note-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.note-col h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.note-col p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.related-list li {
  font-size: 14px;
  line-height: 1.7;
}

.related-list a {
  color: var(--ink-green);
}

.related-list a:hover {
  color: var(--clay);
}

/* ---- 内容归档页 ---- */

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

.dual-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.column-box {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.column-box h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.section-foot {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.section-foot a {
  font-size: 14px;
  color: var(--clay);
  border-bottom: 1px solid rgba(180, 99, 60, .45);
}

.section-foot a:hover {
  color: var(--ink-green);
  border-bottom-color: var(--ink-green);
}

/* ---- 阅读说明页 ---- */

.guide-diagram .diagram-figure {
  margin-top: 18px;
}

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

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

.diagram-note {
  min-width: 0;
  padding: 16px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.diagram-note h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.diagram-note p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.scope-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-col h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

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

.scope-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background-color: var(--clay);
  border-radius: 1px;
}

.scope-more {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.scope-more a {
  font-size: 14px;
  color: var(--clay);
  border-bottom: 1px solid rgba(180, 99, 60, .45);
}

.scope-more a:hover {
  color: var(--ink-green);
  border-bottom-color: var(--ink-green);
}

/* ---- 站点说明页 ---- */

.about-position-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  gap: 26px;
  align-items: start;
  margin-top: 18px;
}

.about-position-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about-position-text p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.about-position-figure {
  margin: 0;
}

.about-position-figure img {
  aspect-ratio: 4 / 3;
}

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

.workflow-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.workflow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  font-size: 13px;
  color: #fff;
  background-color: var(--ink-green);
  border-radius: var(--radius-sm);
}

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

.workflow-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}

.principle-item {
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius);
}

.principle-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.principle-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.boundary-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-subtitle {
  font-size: 16px;
  margin-bottom: 10px;
}

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

.boundary-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background-color: var(--clay);
  border-radius: 1px;
}

.boundary-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
}

.boundary-links {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---- 404 ---- */

.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 72px 24px 88px;
}

.error-panel {
  max-width: 640px;
  padding: 32px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-panel h1 {
  font-size: 32px;
  margin: 14px 0 12px;
}

.error-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-green);
  margin-bottom: 22px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.error-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.error-actions a.btn-primary {
  background-color: var(--ink-green);
  color: var(--panel);
  border-color: var(--ink-green);
}

.error-actions a.btn-primary:hover {
  background-color: var(--clay);
  border-color: var(--clay);
  color: #fff;
}

.error-actions a.btn-ghost {
  background-color: transparent;
  color: var(--ink-green);
  border-color: var(--line-strong);
}

.error-actions a.btn-ghost:hover {
  color: var(--clay);
  border-color: var(--clay);
}

.error-links {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.error-links h2 {
  font-size: 16px;
  margin-bottom: 10px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
}

.error-link-list a {
  font-size: 14px;
  color: var(--ink-green);
}

.error-link-list a:hover {
  color: var(--clay);
}

/* ==========================================================================
   5. responsive — 断点
   ========================================================================== */

/* ---- ≤1024px：收起右锚点栏，降为两栏 ---- */

@media (max-width: 1024px) {
  .page-layout,
  .page-layout.sidebar-left,
  .page-layout:not(.sidebar-left),
  .sidebar-left .page-layout {
    grid-template-columns: var(--side-w) minmax(0, 1fr);
  }

  .page-layout:not(.sidebar-left) {
    grid-template-columns: minmax(0, 1fr) var(--side-w);
  }

  .page-toc {
    display: none;
  }

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

  .zone-card-grid,
  .archive-zones .zone-card-grid,
  .zone-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---- ≤900px：导航收进汉堡菜单 ---- */

@media (max-width: 900px) {
  .header-inner {
    padding: 12px 16px;
    gap: 12px;
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
    margin-left: auto;
  }
}

/* ---- ≤768px：单列，侧栏折叠为横条并移到正文之后 ---- */

@media (max-width: 768px) {
  .page-layout,
  .page-layout.sidebar-left,
  .page-layout:not(.sidebar-left),
  .page-layout:has(.page-toc),
  .page-layout.sidebar-left:has(.page-toc),
  .page-layout:not(.sidebar-left):has(.page-toc),
  .sidebar-left .page-layout,
  .sidebar-left .page-layout:has(.page-toc) {
    grid-template-columns: minmax(0, 1fr);
    padding: 20px 16px 44px;
    gap: 24px;
  }

  /* 关键：辅助侧栏在手机上排到主内容之后，保证 H1 先出现 */
  .page-layout > .site-main {
    order: 1;
  }

  .page-layout > .sidebar-left-col,
  .page-layout > .side-index,
  .page-layout > .left-sidebar,
  .page-layout > .record-index,
  .page-layout > .page-toc {
    order: 2;
  }

  /* 侧栏在后的页面：main 仍在前，aside 在后 */
  .page-layout:not(.sidebar-left) > .site-main {
    order: 1;
  }

  .page-layout:not(.sidebar-left) > aside {
    order: 2;
  }

  /* 侧栏折叠为横条 */
  .side-index,
  .sidebar-left-col,
  .left-sidebar,
  .record-index {
    position: static;
    top: auto;
  }

  .sidebar-left-col .topic-tag-list,
  .side-index .side-index-list,
  .side-index .side-list,
  .sidebar-list,
  .record-index-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .sidebar-left-col .topic-tag-list li,
  .side-index .side-index-list li,
  .side-index .side-list > li,
  .sidebar-list li,
  .record-index-list li {
    margin-top: 0;
  }

  .side-index .side-index-list a,
  .side-index .side-list a,
  .sidebar-list a,
  .record-index-item a {
    border-left: none;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
  }

  .side-index .side-index-list a:hover,
  .side-index .side-list a:hover,
  .sidebar-list a:hover,
  .record-index-item a:hover {
    border-color: var(--clay);
  }

  .side-sublist {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-left: 0;
    border-left: none;
  }

  .side-sublist li {
    margin-top: 0;
  }

  .side-sublist a {
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
  }

  .sidebar-entry {
    display: inline-block;
    margin-right: 8px;
  }

  /* 页头 */
  .brand {
    font-size: 17px;
    padding: 5px 8px;
  }

  /* 标题区 */
  .page-title,
  .hero h1,
  .error-panel h1 {
    font-size: 24px;
  }

  .page-header {
    margin-bottom: 12px;
  }

  .page-title-block,
  .page-head {
    margin-bottom: 24px;
    padding-bottom: 14px;
  }

  /* 首页首屏 */
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding-bottom: 24px;
    margin-bottom: 32px;
  }

  .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .hero-fact dd {
    font-size: 14px;
  }

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

  /* 首页模块 */
  .topic-panel-grid,
  .guide-boundary-grid,
  .note-columns,
  .scope-columns,
  .boundary-grid,
  .dual-column,
  .method-grid,
  .about-position-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .topic-card-grid,
  .topic-grid,
  .structure-columns,
  .related-columns,
  .related-grid,
  .diagram-notes,
  .zone-card-grid,
  .archive-zones .zone-card-grid,
  .zone-grid,
  .workflow-list {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 更新速览行改纵向堆叠 */
  .update-line {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 12px 14px;
  }

  .update-line .update-date,
  .update-line .update-type,
  .update-line .update-code {
    display: inline-block;
    margin-right: 10px;
  }

  /* 时间线行改纵向堆叠 */
  .timeline-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 12px 14px;
  }

  .timeline-row .timeline-type,
  .timeline-row .timeline-code {
    display: inline-block;
    margin-right: 10px;
  }

  /* 角色观察卡改单列 */
  .character-row,
  .character-row.media-right,
  .observation-card,
  .observation-card.card-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .character-row.media-right .character-body,
  .observation-card.card-reverse .card-body {
    order: 1;
  }

  .character-row.media-right .character-figure,
  .observation-card.card-reverse .card-media {
    order: 2;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 28px 16px 16px;
  }

  .footer-bottom {
    padding: 14px 16px 24px;
  }

  /* 404 */
  .error-main {
    padding: 48px 16px 64px;
  }

  .error-panel {
    padding: 24px 20px;
  }

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

/* ---- ≤480px：进一步压缩间距 ---- */

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 12px;
  }

  .page-layout,
  .page-layout.sidebar-left,
  .page-layout:not(.sidebar-left),
  .sidebar-left .page-layout {
    padding: 16px 12px 36px;
  }

  .hero h1,
  .page-title {
    font-size: 22px;
  }

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

  .section-head h2,
  .section h2,
  .section-block h2,
  .topics-overview h2,
  .topic-grid-section h2,
  .topic-structure h2,
  .archive-crossref h2,
  .related-entries h2,
  .observation-list h2,
  .method-block h2,
  .related-entry h2,
  .update-table-section h2,
  .update-timeline h2,
  .update-note h2,
  .update-related h2,
  .guide-faq h2,
  .guide-diagram h2,
  .guide-scope h2,
  .about-position h2,
  .about-workflow h2,
  .about-principles h2,
  .about-boundary h2 {
    font-size: 19px;
  }

  .topic-words,
  .topic-flow,
  .guide-col,
  .group-panel,
  .structure-item,
  .related-item,
  .method-item,
  .related-col,
  .note-col,
  .column-box,
  .diagram-note,
  .scope-col,
  .workflow-item,
  .principle-item,
  .boundary-col,
  .zone-card {
    padding: 14px;
  }

  .footer-inner {
    padding: 24px 12px 14px;
  }

  .footer-bottom {
    padding: 12px 12px 20px;
  }
}

/* ---- 尊重减少动态效果 ---- */

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

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}