/* =========================================================
   base
   ========================================================= */

:root {
  --paper: #f4f2ee;
  --paper-card: #fbfaf7;
  --ink: #1c1d1a;
  --ink-soft: #6d6c66;
  --rule: #d9d5cc;
  --accent: #7c4530;
  --accent-soft: #ece3d9;
  --deep: #24251f;
  --serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --mono: "SFMono-Regular", "Consolas", "Menlo", "Liberation Mono", monospace;
  --wrap: 1120px;
  --main-col: 760px;
  --aside-col: 300px;
  --gap: 60px;
  --radius: 6px;
}

*,
*::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(--sans);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

h1,
h2,
h3 {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 17px;
}

p {
  margin: 0 0 14px;
}

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

dl,
dd {
  margin: 0;
}

dt {
  font-weight: 600;
}

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

.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-color: var(--deep);
  color: #f6f3ec;
  font-size: 13px;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #f6f3ec;
}

/* =========================================================
   layout — 全站骨架
   ========================================================= */

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

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.brand-code {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

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

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

.nav-item > a {
  display: inline-block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}

.nav-item > a:hover,
.nav-item > a:focus-visible {
  color: var(--accent);
}

.nav-item.is-current > a {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--rule);
  background-color: var(--paper-card);
  border-radius: var(--radius);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.menu-toggle-bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background-color: var(--ink);
}

.mobile-drawer {
  background-color: var(--paper-card);
  border-bottom: 1px solid var(--rule);
}

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

.drawer-nav {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 12px 24px 20px;
}

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

.drawer-list li > a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 6px 4px;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.drawer-list li.is-current > a {
  color: var(--accent);
  font-weight: 600;
}

.site-main {
  display: block;
}

.home-main {
  padding-bottom: 0;
}

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

/* 面包屑 */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
}

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

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

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

/* 页标题区 */

.page-header {
  margin-bottom: 8px;
}

.page-title,
h1#page-title,
h1#page-h1,
h1#page-heading {
  font-family: var(--serif);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 600;
  line-height: 1.28;
  color: var(--ink);
  margin: 0;
}

/* 页脚 */

.site-footer {
  background-color: var(--deep);
  color: #d8d4c9;
  margin-top: 72px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 52px 24px 0;
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(150px, 1fr));
  gap: 36px 32px;
}

.footer-brand {
  grid-column: 1 / 2;
}

.footer-brand-name {
  font-family: var(--serif);
  font-size: 18px;
  color: #f4f1e8;
  margin: 0 0 10px;
  font-weight: 600;
}

.footer-brand-desc {
  font-size: 13px;
  line-height: 1.8;
  color: #a8a49a;
  margin: 0;
}

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

.footer-group-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #8f8b81;
  margin: 0 0 12px;
  font-weight: 400;
  text-transform: uppercase;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-group li > a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: #d8d4c9;
  text-decoration: none;
  line-height: 1.5;
}

.footer-group li > a:hover,
.footer-group li > a:focus-visible {
  color: #f0c9a8;
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 40px auto 0;
  padding: 18px 24px 26px;
  border-top: 1px solid #3a3b33;
}

.footer-bottom p {
  font-size: 12px;
  color: #8f8b81;
  margin: 0;
  line-height: 1.7;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 14px;
  font-family: var(--sans);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  line-height: 1.4;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--accent);
  color: #fbf7f1;
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #653725;
  color: #fbf7f1;
  border-color: #653725;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background-color: var(--paper-card);
  color: var(--ink);
  transition: border-color 0.18s ease, color 0.18s ease;
}

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

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: 3px;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-item {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: 3px;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 图片与图注 */

figure {
  margin: 0;
}

figcaption,
.hero-caption,
.faq-figure-caption {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  margin-top: 10px;
}

.hero-visual img,
.group-figure img,
.section-figure img,
.series-figure img,
.media-figure img,
.article-media img,
.content-figure img,
.faq-figure img,
.map-thumb img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background-color: var(--paper-card);
}

/* 区块标题 */

.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  margin-bottom: 8px;
}

.section-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 720px;
}

.section-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 6px;
  text-transform: uppercase;
}

.section-lead {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 22px;
  max-width: 720px;
}

/* 页头元信息（内页共用） */

.page-head,
.page-title-area,
.page-hero,
.page-title-block {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding: 16px 0 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 32px;
}

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

.page-title-block + .page-layout {
  margin-top: 0;
}

.page-head-main,
.page-title-main,
.page-hero-main {
  min-width: 0;
  flex: 1 1 auto;
}

.page-head-code,
.page-code,
.section-code,
.page-hero-main .section-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0;
  text-transform: uppercase;
}

.page-head-meta,
.page-meta,
.page-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, auto));
  gap: 6px 24px;
  flex: 0 0 auto;
  max-width: 46%;
  margin: 0;
}

.meta-row,
.meta-item {
  min-width: 0;
}

.page-head-meta dt,
.page-meta dt,
.page-hero-meta dt,
.meta-row dt,
.meta-item dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-weight: 400;
  margin-bottom: 2px;
  text-transform: uppercase;
}

.page-head-meta dd,
.page-meta dd,
.page-hero-meta dd,
.meta-row dd,
.meta-item dd {
  font-size: 13px;
  color: var(--ink);
  line-height: 1.6;
}

/* 主栏 + 侧栏布局 */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--main-col)) var(--aside-col);
  gap: var(--gap);
  align-items: start;
}

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

.page-aside,
.page-sidebar,
.content-aside {
  min-width: 0;
  position: sticky;
  top: 24px;
}

/* 侧栏面板 */

.aside-panel {
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
  margin-bottom: 24px;
}

.aside-title,
.sidebar-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  font-weight: 400;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.aside-anchor-list,
.aside-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-anchor-list li > a,
.aside-list li > a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.aside-anchor-list li:last-child > a,
.aside-list li:last-child > a {
  border-bottom: none;
}

.aside-anchor-list li > a:hover,
.aside-list li > a:hover {
  color: var(--accent);
}

.aside-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-right: 8px;
}

.aside-note {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 14px 0 0;
}

.aside-note a {
  color: var(--accent);
}

.aside-panel-title {
  font-family: var(--serif);
  font-size: 15px;
  margin: 0 0 8px;
}

.aside-panel-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.75;
}

/* 继续查阅 / 下一步 */

.related-links {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  border-top: 1px solid var(--rule);
}

.related-links-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.related-links-item {
  font-size: 14px;
  color: var(--ink);
}

.continue-band,
.continue-block,
.continue-section,
.next-step,
.next-read {
  margin-top: 48px;
  padding: 26px 28px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.continue-band h2,
.continue-block h2,
.next-step h2,
.next-read h2 {
  font-size: 19px;
  margin-bottom: 8px;
}

.continue-band p,
.continue-block p,
.next-step p,
.next-read p,
.continue-text {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 640px;
}

.continue-links,
.next-step-links,
.next-read-links,
.next-links-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.continue-link,
.next-read-link,
.link-primary,
.link-secondary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background-color: var(--paper);
}

.continue-link:hover,
.next-read-link:hover,
.link-primary:hover,
.link-secondary:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.next-step-links .link-primary,
.next-links-actions .btn-primary {
  background-color: var(--accent);
  color: #fbf7f1;
  border-color: var(--accent);
}

.next-step-links .link-primary:hover {
  color: #fbf7f1;
  background-color: #653725;
  border-color: #653725;
}

.next-step-desc {
  margin-bottom: 16px;
}

/* 定义列表通用 */

.field-list,
.definition-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin: 20px 0 0;
}

.field-row,
.definition-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.field-row dt,
.definition-row dt {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.field-row dd,
.definition-row dd {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.75;
}

/* =========================================================
   pages — 首页
   ========================================================= */

/* 首屏目录区 */

.hero-directory {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 24px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.hero-left {
  min-width: 0;
  padding-top: 6px;
}

.hero-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.hero-left h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 46px);
  font-weight: 600;
  line-height: 1.22;
  margin: 0 0 20px;
  color: var(--ink);
}

.hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 460px;
  margin: 0 0 28px;
}

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

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

.index-table {
  border-top: 1px solid var(--rule);
}

.index-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

.index-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.index-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  line-height: 1.5;
}

.index-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

.index-note {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* 首屏主视觉 */

.hero-visual {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.hero-caption {
  padding: 0;
}

/* 锚点索引条 */

.anchor-bar {
  background-color: var(--deep);
  color: #d8d4c9;
  margin-top: 40px;
}

.anchor-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 0 max(24px, calc((100% - var(--wrap)) / 2 + 24px));
  min-height: 56px;
}

.anchor-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #8f8b81;
  text-transform: uppercase;
  flex-shrink: 0;
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.anchor-list li > a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 14px;
  color: #d8d4c9;
  text-decoration: none;
  border-radius: 3px;
}

.anchor-list li > a:hover,
.anchor-list li > a:focus-visible {
  color: #f0c9a8;
  background-color: #33342c;
}

/* 条目清单长页 */

.entry-section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.entry-group {
  padding: 28px 0 8px;
  border-top: 1px solid var(--rule);
  margin-top: 28px;
}

.entry-group:first-of-type {
  margin-top: 0;
}

.group-head {
  margin-bottom: 16px;
}

.group-head h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.group-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 700px;
}

.entry-list {
  border-top: 1px solid var(--rule);
}

.entry-row {
  display: grid;
  grid-template-columns: 88px minmax(120px, 0.9fr) minmax(0, 1.6fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}

.entry-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.entry-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.entry-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.group-figure {
  margin-top: 22px;
}

.group-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  max-height: 360px;
  object-fit: cover;
}

/* 当期片单档案 */

.series-section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 0;
}

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

.series-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 22px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.series-card:hover {
  border-color: var(--accent);
}

.series-badge {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 3px 9px;
  border-radius: 3px;
}

.series-card h3 {
  font-size: 17px;
  margin: 0;
}

.series-scope {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0;
}

.series-meta {
  margin: 4px 0 0;
  font-size: 13px;
}

.series-meta a {
  color: var(--accent);
  font-weight: 600;
}

/* 编号读法 */

.code-section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.code-sample {
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 24px 26px;
}

.code-string {
  font-family: var(--mono);
  font-size: clamp(18px, 2.4vw, 26px);
  letter-spacing: 0.06em;
  color: var(--ink);
  margin: 0 0 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
  word-break: break-all;
}

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

.code-note dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 4px;
}

.code-note dd {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.code-more {
  font-size: 14px;
  margin: 18px 0 0;
}

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

/* 观看环境 */

.env-section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.env-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.env-item {
  padding: 20px 22px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

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

.env-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0 0 8px;
}

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

.env-more {
  font-size: 14px;
  margin: 20px 0 0;
}

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

/* 来源与边界要点 */

.boundary-section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
  border-top: 1px solid var(--rule);
  padding-top: 22px;
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.75;
}

.boundary-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

.boundary-more {
  font-size: 14px;
  margin: 22px 0 0;
}

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

/* 首页纠错反馈入口条 */

.feedback-strip {
  max-width: var(--wrap);
  margin: 56px auto 0;
  padding: 30px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background-color: var(--deep);
  border-radius: var(--radius);
  color: #d8d4c9;
}

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

.feedback-text h2 {
  color: #f4f1e8;
  font-size: 20px;
  margin-bottom: 8px;
}

.feedback-text p {
  font-size: 14px;
  color: #a8a49a;
  margin: 0;
  line-height: 1.75;
  max-width: 620px;
}

.feedback-strip .btn-primary {
  flex-shrink: 0;
  background-color: #f0c9a8;
  color: #3c2a1e;
  border-color: #f0c9a8;
}

.feedback-strip .btn-primary:hover {
  background-color: #e6b992;
  border-color: #e6b992;
  color: #3c2a1e;
}

/* =========================================================
   pages — 频道目录
   ========================================================= */

.section {
  margin-bottom: 48px;
}

.section h2 {
  margin-bottom: 8px;
}

.catalog-table {
  border-top: 1px solid var(--rule);
}

.catalog-row {
  display: grid;
  grid-template-columns: 56px minmax(120px, 0.8fr) minmax(0, 2fr) 24px;
  gap: 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.catalog-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.catalog-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}

.catalog-name:hover {
  color: var(--accent);
  text-decoration: underline;
}

.catalog-scope {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.catalog-arrow {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--rule);
  text-align: right;
}

.section-figure {
  margin: 24px 0 40px;
}

.section-figure img {
  aspect-ratio: 3 / 2;
}

.category-block {
  border-top: 1px solid var(--rule);
  padding: 22px 0 20px;
}

.category-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.category-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.category-head h3 {
  font-size: 18px;
  margin: 0;
}

.category-body {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 20px;
}

.category-field {
  min-width: 0;
}

.category-field p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.category-field .tag-list {
  margin-top: 2px;
}

.section-boundary .boundary-list {
  padding-top: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.boundary-list .boundary-item {
  padding-left: 18px;
}

.boundary-pair {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin: 0 0 8px;
  line-height: 1.6;
}

.boundary-a,
.boundary-b {
  color: var(--ink);
  font-weight: 600;
}

.boundary-vs {
  color: var(--ink-soft);
  margin: 0 6px;
}

.boundary-note {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

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

.next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.18s ease;
}

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

.next-link-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.next-link-desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* =========================================================
   pages — 片单档案
   ========================================================= */

.page-divider {
  height: 1px;
  background-color: var(--rule);
  margin: 0 0 36px;
}

.series-intro {
  margin-bottom: 40px;
}

.series-intro h2 {
  margin-bottom: 12px;
}

.series-intro p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.85;
  max-width: 760px;
}

.series-archive {
  margin-bottom: 48px;
}

.series-archive h2 {
  margin-bottom: 22px;
}

.series-block {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--rule);
}

.series-block-head {
  min-width: 0;
}

.series-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 8px;
}

.series-title {
  font-size: 19px;
  margin: 0;
  line-height: 1.4;
}

.series-block-body {
  min-width: 0;
}

.series-block-body .series-scope {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0 0 10px;
}

.series-block-body .tag-list {
  margin: 12px 0;
}

.series-link {
  margin: 0;
  font-size: 13px;
}

.series-link a {
  color: var(--accent);
  font-weight: 600;
}

.series-figure {
  margin: 24px 0;
}

.series-figure img {
  aspect-ratio: 16 / 7;
}

.series-map {
  margin-bottom: 48px;
}

.series-map h2 {
  margin-bottom: 10px;
}

.series-map > p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.series-map-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.series-map-table thead th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-transform: uppercase;
  font-weight: 400;
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
}

.series-map-table tbody th {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  text-align: left;
  padding: 12px;
  border-bottom: 1px solid var(--rule);
  font-weight: 600;
  white-space: nowrap;
}

.series-map-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  line-height: 1.7;
}

.series-guide {
  margin-bottom: 40px;
}

.series-guide h2 {
  margin-bottom: 20px;
}

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

.guide-item {
  padding: 20px 22px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.guide-item-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.guide-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.series-help {
  padding: 24px 26px;
  border-left: 3px solid var(--accent);
  background-color: var(--paper-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 8px;
}

.series-help h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.series-help p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0 0 8px;
}

.series-help p:last-child {
  margin-bottom: 0;
}

/* =========================================================
   pages — 编号与标签
   ========================================================= */

.content-section {
  margin-bottom: 44px;
}

.content-section h2 {
  margin-bottom: 10px;
}

.media-figure {
  margin: 20px 0 24px;
}

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

.code-sample-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-transform: uppercase;
  margin: 0 0 8px;
}

.code-sample-value {
  font-family: var(--mono);
  font-size: clamp(17px, 2.2vw, 23px);
  letter-spacing: 0.05em;
  color: var(--ink);
  margin: 0;
  word-break: break-all;
}

.code-sample-value strong {
  color: var(--accent);
  font-weight: 600;
}

.tag-group {
  margin-top: 22px;
}

.tag-group h3 {
  font-size: 15px;
  margin-bottom: 10px;
  color: var(--ink);
}

.tag-group .tag-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.tag-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

.tag-row dt {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.tag-row dd {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

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

.misread-item {
  counter-increment: misread;
  position: relative;
  padding: 16px 18px 16px 52px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.misread-item::before {
  content: counter(misread, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 16px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.misread-wrong {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 6px;
  line-height: 1.7;
}

.misread-wrong::before {
  content: "误读 ";
  font-family: var(--mono);
  font-size: 11px;
  color: #a05a3c;
  letter-spacing: 0.04em;
}

.misread-right {
  font-size: 14px;
  color: var(--ink);
  margin: 0;
  line-height: 1.75;
}

.misread-right::before {
  content: "正读 ";
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.section-outro {
  font-size: 14px;
  margin: 22px 0 0;
}

.section-outro a {
  color: var(--accent);
  font-weight: 600;
}

/* 侧栏术语提示 */

.sidebar-lead {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0 0 14px;
}

.term-tips {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.term-tip {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background-color: var(--paper-card);
  overflow: hidden;
}

.term-tip-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  background-color: transparent;
  border: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  line-height: 1.5;
}

.term-tip-toggle::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  color: var(--accent);
  font-size: 15px;
}

.term-tip-toggle[aria-expanded="true"]::after {
  content: "−";
}

.term-tip-toggle:hover {
  color: var(--accent);
}

.term-tip-body {
  padding: 0 14px 12px;
}

.term-tip-body[hidden] {
  display: none;
}

.term-tip-body p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0 0 6px;
}

.term-tip-body p:last-child {
  margin-bottom: 0;
}

.sidebar-links {
  margin-top: 28px;
}

.sidebar-links ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-links li > a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.sidebar-links li > a:hover {
  color: var(--accent);
}

.page-sidebar {
  background-color: transparent;
}

.next-links {
  margin-top: 0;
}

/* =========================================================
   pages — 来源与边界
   ========================================================= */

.title-rule {
  height: 1px;
  background-color: var(--rule);
  margin: 0 0 32px;
}

.article-body {
  max-width: var(--main-col);
}

.article-body .content-section h2 {
  margin-bottom: 10px;
}

.article-body .content-section > p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.85;
  margin-bottom: 14px;
}

.article-body .boundary-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  margin-top: 8px;
}

.boundary-item h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.boundary-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.article-media {
  margin: 28px 0;
}

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

.section-note {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 14px 0 0;
}

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

.principle-card {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.trigger-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.trigger-item {
  padding: 16px 18px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
}

/* =========================================================
   pages — 使用问答
   ========================================================= */

.page-intro {
  max-width: var(--main-col);
  margin-bottom: 36px;
}

.page-intro p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.85;
  margin: 0;
}

.faq-group {
  max-width: var(--main-col);
  margin-bottom: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.faq-group-head {
  margin-bottom: 16px;
}

.faq-group-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 6px;
}

.faq-group-head h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.faq-group-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.75;
}

.faq-figure {
  margin: 0 0 20px;
}

.faq-figure img {
  aspect-ratio: 16 / 7;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--rule);
}

.faq-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  line-height: 1.6;
}

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

.faq-summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  flex-shrink: 0;
}

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

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

.faq-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.faq-body {
  padding: 0 0 16px 32px;
}

.faq-body p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0 0 8px;
}

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

.faq-body a {
  color: var(--accent);
}

/* =========================================================
   pages — 纠错反馈
   ========================================================= */

.issue-list {
  counter-reset: issue;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-top: 16px;
}

.issue-item {
  counter-increment: issue;
  position: relative;
  padding: 14px 0 14px 40px;
  border-bottom: 1px solid var(--rule);
}

.issue-item::before {
  content: counter(issue, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.issue-title {
  font-size: 16px;
  margin: 0 0 4px;
}

.issue-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.content-figure {
  margin: 20px 0 24px;
}

.content-figure img {
  aspect-ratio: 16 / 7;
}

.checklist {
  counter-reset: check;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.checklist-item {
  counter-increment: check;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 12px 16px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.checklist-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.checklist-num::before {
  content: counter(check, decimal-leading-zero);
}

.checklist-text {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.7;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.step {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.step-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 8px;
}

.step-title {
  font-size: 16px;
  margin: 0 0 6px;
}

.step-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.reject-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.reject-item {
  padding: 14px 18px;
  border-left: 3px solid var(--rule);
  background-color: var(--paper-card);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.reject-title {
  font-size: 15px;
  margin: 0 0 4px;
}

.reject-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

/* =========================================================
   pages — 栏目总览
   ========================================================= */

.page-shell {
  max-width: var(--main-col);
  margin: 0 auto;
}

.page-head .page-head-main {
  flex: 1 1 auto;
}

.page-shell .page-head {
  margin-bottom: 0;
}

.rule {
  border: none;
  height: 1px;
  background-color: var(--rule);
  margin: 0 0 32px;
}

.shell-section {
  margin-bottom: 44px;
}

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

.shell-section .section-head h2 {
  margin-bottom: 6px;
}

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

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

.map-entry {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.map-entry:hover {
  border-color: var(--accent);
}

.map-entry--plain {
  display: block;
}

.map-thumb {
  margin: 0;
}

.map-thumb img {
  aspect-ratio: 3 / 2;
}

.map-thumb figcaption {
  font-size: 11px;
  margin-top: 6px;
}

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

.map-entry-code {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 0 0 4px;
}

.map-entry-body h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.map-entry-body h3 a {
  color: var(--ink);
  text-decoration: none;
}

.map-entry-body h3 a:hover {
  color: var(--accent);
}

.map-entry-desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0;
}

.deep-links {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.deep-links-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-weight: 400;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.deep-links-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.deep-links-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  font-size: 14px;
}

.deep-links-list li > a {
  color: var(--ink);
  font-weight: 600;
}

.deep-links-list li > a:hover {
  color: var(--accent);
}

.deep-links-note {
  font-size: 13px;
  color: var(--ink-soft);
}

.continue-section {
  max-width: var(--main-col);
  margin: 48px auto 0;
  padding: 24px 26px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.continue-section .continue-text {
  margin-bottom: 14px;
}

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

.continue-section .continue-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

/* =========================================================
   pages — 404
   ========================================================= */

.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

.error-panel {
  max-width: 620px;
  padding: 40px 36px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 12px;
}

.error-panel h1 {
  font-family: var(--serif);
  font-size: clamp(26px, 3vw, 34px);
  margin: 0 0 14px;
}

.error-lead {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0 0 20px;
}

.error-tips {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
}

.error-tips li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.75;
}

.error-tips li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

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

/* =========================================================
   responsive
   ========================================================= */

@media (max-width: 1080px) {
  .hero-directory {
    gap: 40px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 40px;
  }

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

  .category-body .category-field:last-child {
    grid-column: 1 / -1;
  }

  .series-block {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
  }

  .footer-inner {
    grid-template-columns: minmax(220px, 1.3fr) repeat(3, minmax(140px, 1fr));
    gap: 32px 24px;
  }
}

@media (max-width: 960px) {
  .nav-list {
    gap: 0;
  }

  .nav-item > a {
    padding: 8px 7px;
    font-size: 13px;
  }

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

  .env-item:last-child {
    grid-column: 1 / -1;
  }

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

  .guide-item:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .header-inner {
    min-height: 60px;
    padding: 0 18px;
    gap: 12px;
  }

  .primary-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .drawer-nav {
    padding: 8px 18px 18px;
  }

  .hero-directory {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 32px 18px 28px;
  }

  .hero-lead {
    max-width: none;
  }

  .hero-visual {
    padding: 0 18px;
  }

  .hero-visual img {
    aspect-ratio: 16 / 9;
  }

  .anchor-bar {
    padding: 12px 18px;
    gap: 8px 14px;
  }

  .anchor-list {
    gap: 2px 6px;
  }

  .entry-section,
  .series-section,
  .code-section,
  .env-section,
  .boundary-section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .entry-row {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 6px 14px;
  }

  .entry-desc {
    grid-column: 2 / 3;
  }

  .entry-tags {
    grid-column: 2 / 3;
    justify-content: flex-start;
  }

  .code-notes {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

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

  .feedback-strip {
    flex-direction: column;
    align-items: flex-start;
    margin: 40px 18px 0;
    padding: 26px 22px;
    gap: 18px;
  }

  .inner-main {
    padding: 20px 18px 56px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .page-aside,
  .page-sidebar,
  .content-aside {
    position: static;
  }

  .page-head,
  .page-title-area,
  .page-hero,
  .page-title-block {
    flex-direction: column;
    gap: 16px;
    padding: 12px 0 20px;
  }

  .page-title-block {
    padding-bottom: 0;
  }

  .page-head-meta,
  .page-meta,
  .page-hero-meta {
    max-width: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
    gap: 8px 16px;
  }

  .catalog-row {
    grid-template-columns: 48px minmax(0, 1fr) 20px;
    gap: 4px 12px;
  }

  .catalog-scope {
    grid-column: 2 / 3;
  }

  .catalog-arrow {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }

  .category-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .category-body .category-field:last-child {
    grid-column: auto;
  }

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

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

  .series-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .series-figure img,
  .article-media img,
  .content-figure img,
  .faq-figure img,
  .media-figure img {
    aspect-ratio: 16 / 9;
  }

  .series-map-table {
    font-size: 13px;
  }

  .series-map-table thead th,
  .series-map-table tbody th,
  .series-map-table tbody td {
    padding: 10px 8px;
  }

  .guide-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .guide-item:last-child {
    grid-column: auto;
  }

  .article-body {
    max-width: none;
  }

  .faq-group,
  .page-intro {
    max-width: none;
  }

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

  .page-shell {
    max-width: none;
  }

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

  .continue-section {
    max-width: none;
  }

  .error-main {
    padding: 48px 18px 64px;
  }

  .error-panel {
    padding: 32px 24px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
    padding: 40px 18px 0;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    padding: 16px 18px 24px;
    margin-top: 28px;
  }

  .related-links {
    padding: 20px 18px 0;
  }

  .site-footer {
    margin-top: 56px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

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

  .brand-code {
    display: none;
  }

  .hero-left h1 {
    font-size: 28px;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .index-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 2px 10px;
    padding: 12px 0;
  }

  .index-note {
    grid-column: 2 / 3;
  }

  .series-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .env-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .env-item:last-child {
    grid-column: auto;
  }

  .entry-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

  .entry-desc,
  .entry-tags {
    grid-column: auto;
  }

  .entry-name {
    font-size: 15px;
  }

  .code-string {
    font-size: 16px;
    letter-spacing: 0.03em;
  }

  .code-sample,
  .code-sample-value {
    padding: 18px 16px;
  }

  .code-sample-value {
    padding: 0;
  }

  .field-row,
  .definition-row,
  .tag-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .page-head-meta dt,
  .page-meta dt,
  .page-hero-meta dt {
    display: inline;
    margin-right: 8px;
  }

  .page-head-meta dd,
  .page-meta dd,
  .page-hero-meta dd {
    display: inline;
  }

  .meta-row,
  .meta-item {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0 8px;
  }

  .meta-row dt,
  .meta-item dt {
    margin-bottom: 0;
  }

  .catalog-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 2px 10px;
  }

  .catalog-scope {
    grid-column: 2 / 3;
  }

  .catalog-arrow {
    display: none;
  }

  .faq-body {
    padding-left: 0;
  }

  .misread-item {
    padding: 14px 16px 14px 44px;
  }

  .misread-item::before {
    left: 14px;
    top: 14px;
  }

  .issue-item {
    padding-left: 32px;
  }

  .checklist-item {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .series-map-table thead {
    display: none;
  }

  .series-map-table,
  .series-map-table tbody,
  .series-map-table tr,
  .series-map-table th,
  .series-map-table td {
    display: block;
    width: 100%;
  }

  .series-map-table tr {
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }

  .series-map-table tbody th,
  .series-map-table tbody td {
    border-bottom: none;
    padding: 2px 0;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

  .footer-group li > a {
    padding: 8px 0;
  }

  .continue-links .btn,
  .next-step-links a,
  .next-read-links a,
  .next-links-actions a,
  .error-actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }

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

  .deep-links-list li {
    flex-direction: column;
    gap: 2px;
  }
}

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

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

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}