:root {
  --paper: #f4f1ea;
  --ink: #1f1d1a;
  --ink-soft: #615b52;
  --rule: #d6cfc3;
  --accent: #7d3f2d;
  --stage: #ebe5da;
  --dark: #2a2621;
  --serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --wrap: 1120px;
  --read: 38em;
  --gap: 28px;
}

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

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

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

body {
  margin: 0;
  background: 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: inherit;
  text-decoration: none;
}

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

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--ink);
}

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

/* ==========================================================================
   layout
   ========================================================================== */

.site-header {
  position: relative;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 10px 0;
  flex: 0 0 auto;
}

.brand-mark {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.brand-sub {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-list > li {
  display: flex;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  padding: 4px 0;
  transition: color 0.18s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link.is-current {
  color: var(--ink);
  font-weight: 600;
}

.nav-link.is-current::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.site-main {
  display: block;
}

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

.home-main {
  display: block;
}

.site-footer {
  margin-top: 0;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 52px 24px 40px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr);
  gap: 44px;
}

.footer-brand-name {
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.footer-brand-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 30em;
}

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

.footer-group-title {
  font-size: 12px;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.footer-list > li {
  margin-bottom: 8px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: var(--ink-soft);
  transition: color 0.18s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--rule);
}

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ==========================================================================
   components
   ========================================================================== */

/* 面包屑与内页标题区 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumb a {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  color: var(--ink-soft);
}

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

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

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

.page-header {
  padding: 14px 0 30px;
  border-bottom: 1px solid var(--rule);
}

.page-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.28;
  color: var(--ink);
  max-width: 24em;
}

/* 展签式小节标题 */
.section-head {
  margin-bottom: 26px;
}

.section-num,
.section-index {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.35;
  display: inline-block;
  position: relative;
  padding-bottom: 10px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0.35);
  transform-origin: left center;
  transition: transform 0.28s ease;
}

.section-head:hover .section-title::after {
  transform: scaleX(1);
}

.section-desc,
.section-intro,
.section-note,
.section-lead {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
}

.section-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.section-more::after {
  content: "\2192";
  font-size: 13px;
}

.section-more:hover,
.section-more:focus-visible {
  border-bottom-color: var(--accent);
}

/* 相关入口双列条 */
.related-entry {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.related-card,
.related-link {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--stage);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.related-card:hover,
.related-card:focus-visible,
.related-link:hover,
.related-link:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 6px;
}

.related-name {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  margin-bottom: 6px;
}

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

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

.related-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.related-item {
  padding: 20px 22px;
  border-left: 2px solid var(--accent);
  background: var(--stage);
  border-radius: 0 6px 6px 0;
}

.related-link {
  font-family: var(--serif);
  font-size: 16px;
  padding: 0;
  border: 0;
  background: none;
  border-radius: 0;
  margin-bottom: 6px;
}

.related-link:hover,
.related-link:focus-visible {
  transform: none;
  color: var(--accent);
}

/* 公告摘要通用条目 */
.notice-list {
  display: block;
}

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

.notice-item:first-child {
  padding-top: 0;
}

.notice-date {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.notice-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.notice-title a {
  transition: color 0.18s ease;
}

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

/* 图片容器统一约束 */
.exhibit-figure,
.feature-media,
.channel-figure,
.guide-figure,
.media-figure,
.content-media {
  overflow: hidden;
  background: var(--stage);
  border-radius: 6px;
}

.exhibit-image,
.feature-media img,
.channel-figure img,
.guide-figure img,
.media-figure img,
.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

a:hover .feature-media img,
.feature-strip:hover .feature-media img,
.feature-unit:hover .feature-media img {
  transform: scale(1.02);
}

.figure-caption,
.feature-caption,
.media-caption,
.content-media figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 2px 0;
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

.hero {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  border-bottom: 1px solid var(--rule);
}

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

.hero-eyebrow {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-newcomer h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.16;
  font-weight: 600;
  max-width: 15em;
  margin-bottom: 22px;
}

.hero-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 32em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 26px;
  font-size: 14px;
  letter-spacing: 0.04em;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--dark);
  color: var(--paper);
  border: 1px solid var(--dark);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-ghost {
  border: 1px solid var(--rule);
  color: var(--ink);
}

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

.hero-returning {
  min-width: 0;
  padding-left: 32px;
  border-left: 1px solid var(--rule);
}

.hero-returning-title {
  font-size: 14px;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.quick-entry-list {
  display: grid;
  gap: 0;
}

.quick-entry {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.quick-entry:first-child {
  padding-top: 0;
}

.quick-entry-num {
  grid-row: 1 / span 2;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.quick-entry-link {
  font-family: var(--serif);
  font-size: 17px;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  transition: color 0.18s ease;
}

.quick-entry-desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 4px 0 0;
}

/* 参观信息固定条 */
.visit-bar {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--rule);
}

.visit-item {
  padding: 26px 28px 26px 0;
  min-width: 0;
}

.visit-item + .visit-item {
  padding-left: 28px;
  border-left: 1px solid var(--rule);
}

.visit-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

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

/* 主展品与展签 */
.featured-exhibit {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

.exhibit-figure {
  width: 100%;
  aspect-ratio: 21 / 9;
}

.exhibit-caption {
  max-width: 56em;
  padding: 26px 0 0;
  border-top: 1px solid var(--rule);
  margin-top: 26px;
}

.exhibit-num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 10px;
}

.exhibit-title {
  font-size: clamp(22px, 2.8vw, 32px);
  margin-bottom: 14px;
}

.exhibit-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 44em;
}

/* 频道索引 */
.channel-index {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px;
  border-top: 1px solid var(--rule);
}

.channel-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.channel-item {
  padding: 22px 26px 22px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.channel-item:nth-child(3n + 2),
.channel-item:nth-child(3n) {
  padding-left: 26px;
  border-left: 1px solid var(--rule);
}

.channel-link {
  font-family: var(--serif);
  font-size: 18px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  margin-bottom: 6px;
  transition: color 0.18s ease;
}

.channel-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 22em;
}

/* 专题展签带 */
.feature-band {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px 56px;
}

.feature-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
}

.feature-strip-reverse {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
}

.feature-strip-reverse .feature-media {
  order: 2;
}

.feature-strip-reverse .feature-body {
  order: 1;
}

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

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

.feature-num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 8px;
}

.feature-title {
  font-size: clamp(20px, 2.4vw, 26px);
  margin-bottom: 12px;
}

.feature-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
}

.feature-order {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 2px solid var(--rule);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  margin-top: 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.feature-link::after {
  content: "\2192";
}

.feature-link:hover,
.feature-link:focus-visible {
  border-bottom-color: var(--accent);
}

/* 公告与观看准备双栏 */
.notice-guide-row {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
}

.notice-digest,
.guide-digest {
  min-width: 0;
}

.guide-list {
  display: grid;
  gap: 0;
}

.guide-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.guide-item:first-child {
  padding-top: 0;
}

.guide-icon {
  grid-row: 1 / span 2;
  width: 30px;
  height: 30px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 13px;
  color: var(--accent);
}

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

.guide-title {
  font-size: 16px;
  margin-bottom: 4px;
}

.guide-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 内容边界入口条 */
.boundary-bar {
  max-width: var(--wrap);
  margin: 0 auto 56px;
  padding: 28px 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 32px;
  align-items: center;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--stage);
}

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

.boundary-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.boundary-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.boundary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.boundary-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  font-size: 13px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

/* ==========================================================================
   pages · 节目目录
   ========================================================================== */

.page-program-catalog .page-hero,
.page-viewing-guide .page-hero {
  padding: 34px 0 32px;
  border-bottom: 1px solid var(--rule);
}

.page-index {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 12px;
}

.page-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  max-width: var(--read);
  margin-bottom: 12px;
}

.page-note,
.page-tagline {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: var(--read);
  padding-top: 12px;
  border-top: 1px solid var(--rule);
}

.catalog-usage {
  padding: 44px 0 40px;
}

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

.usage-item {
  padding: 22px 24px;
  background: var(--stage);
  border-radius: 6px;
  min-width: 0;
}

.usage-step {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

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

.usage-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-program-catalog .channel-index {
  max-width: none;
  padding: 40px 0 0;
  border-top: 1px solid var(--rule);
}

.channel-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
}

.channel-entry-reverse {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
}

.channel-entry-reverse .channel-figure {
  order: 2;
}

.channel-entry-reverse .channel-body {
  order: 1;
}

.channel-figure {
  aspect-ratio: 4 / 3;
  width: 100%;
}

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

.channel-no {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 8px;
}

.channel-name {
  font-size: clamp(20px, 2.4vw, 26px);
  margin-bottom: 10px;
}

.channel-name a {
  transition: color 0.18s ease;
}

.channel-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  margin-bottom: 12px;
}

.channel-body .channel-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
  margin-bottom: 10px;
}

.channel-tip {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 2px solid var(--rule);
  max-width: var(--read);
}

.reading-method {
  padding: 48px 0 0;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
  counter-reset: method;
}

.method-item {
  padding-left: 18px;
  border-left: 2px solid var(--rule);
  min-width: 0;
}

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

.method-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages · 专题展映
   ========================================================================== */

.page-curated-features .page-head,
.page-content-boundaries .page-head,
.page-notices .page-head {
  padding: 34px 0 32px;
  border-bottom: 1px solid var(--rule);
}

.section {
  padding: 44px 0 0;
}

.section-intro .intro-text {
  font-size: 16px;
  line-height: 1.85;
  max-width: var(--read);
  margin-top: 16px;
}

.section-intro .intro-hint {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: var(--read);
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--rule);
}

.feature-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: start;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
}

.feature-unit-reverse {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
}

.feature-unit-reverse .feature-media {
  order: 2;
}

.feature-unit-reverse .feature-body {
  order: 1;
}

.feature-unit .feature-media {
  aspect-ratio: 4 / 3;
}

.feature-index {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 8px;
}

.feature-structure {
  margin-top: 16px;
  padding: 16px 18px;
  background: var(--stage);
  border-radius: 6px;
}

.feature-subtitle {
  font-size: 13px;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 10px;
}

.feature-list > li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.feature-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.feature-unit .feature-order {
  margin-top: 16px;
  padding-left: 0;
  border-left: 0;
}

.feature-unit .feature-order .feature-text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.section-order .order-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.order-step {
  padding: 22px 24px;
  border-top: 2px solid var(--accent);
  background: var(--stage);
  border-radius: 0 0 6px 6px;
  min-width: 0;
}

.order-num {
  display: block;
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

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

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

.archive-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 40px;
  margin-top: 20px;
  border-top: 1px solid var(--rule);
}

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

.archive-item a {
  display: flex;
  align-items: center;
  min-height: 52px;
  font-size: 14px;
  color: var(--ink-soft);
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.archive-item a:hover,
.archive-item a:focus-visible {
  color: var(--accent);
  padding-left: 6px;
}

.section-related .related-grid {
  margin-top: 24px;
}

/* ==========================================================================
   pages · 观看准备
   ========================================================================== */

.guide-checklist,
.guide-entry,
.guide-anchors,
.guide-faq,
.guide-record,
.guide-notices {
  padding: 44px 0 0;
}

.guide-checklist .guide-figure {
  aspect-ratio: 16 / 7;
  margin-bottom: 28px;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 40px;
  border-top: 1px solid var(--rule);
}

.checklist-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.checklist-name {
  font-family: var(--serif);
  font-size: 16px;
  margin-bottom: 6px;
}

.checklist-standard {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 4px;
}

.checklist-hint {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 4px;
}

.entry-step {
  padding: 22px 24px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  min-width: 0;
}

.entry-step .step-number {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 8px;
}

.entry-step .step-title {
  font-family: var(--serif);
  font-size: 17px;
  margin-bottom: 8px;
}

.entry-step .step-text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.anchor-item {
  padding: 18px 20px;
  background: var(--stage);
  border-radius: 6px;
  min-width: 0;
}

.anchor-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-family: var(--serif);
  font-size: 16px;
  margin-bottom: 6px;
  transition: color 0.18s ease;
}

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

.faq-group {
  margin-top: 24px;
}

.faq-group:first-of-type {
  margin-top: 4px;
}

.faq-group-title {
  font-size: 17px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

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

.faq-question {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 34px 12px 0;
  font-size: 15px;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
  transition: color 0.18s ease;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--serif);
  font-size: 18px;
  color: var(--accent);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question {
  color: var(--accent);
}

.faq-item[open] .faq-question::after {
  content: "\2212";
}

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

.faq-answer {
  padding: 0 34px 18px 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
}

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

.record-item {
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  min-width: 0;
}

.record-name {
  font-family: var(--serif);
  font-size: 16px;
  margin-bottom: 6px;
}

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

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

.guide-notices .notice-item {
  padding: 18px 20px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  min-width: 0;
}

.guide-notices .notice-item:first-child {
  padding-top: 18px;
}

.notice-link {
  display: block;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 8px;
  transition: color 0.18s ease;
}

.notice-summary {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages · 站点公告
   ========================================================================== */

.page-head .content-media-inline {
  margin-top: 24px;
  aspect-ratio: 16 / 6;
}

.notice-pinned {
  margin-top: 40px;
  padding: 26px 28px;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--stage);
}

.notice-pinned-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent);
  padding-top: 4px;
}

.notice-pinned-body {
  min-width: 0;
}

.notice-pinned-title {
  font-size: clamp(19px, 2.2vw, 24px);
  margin-bottom: 8px;
}

.notice-pinned-date {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.notice-pinned-summary {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
  margin-bottom: 12px;
}

.notice-pinned-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.notice-pinned-link:hover,
.notice-pinned-link:focus-visible {
  border-bottom-color: var(--accent);
}

.page-notices .notice-list {
  padding-top: 44px;
}

.page-notices .notice-list > .section-title {
  margin-bottom: 8px;
}

.page-notices .notice-list > .section-note {
  margin-bottom: 24px;
}

.page-notices .notice-list .notice-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
}

.notice-item-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 24px;
  align-items: baseline;
  margin-bottom: 12px;
}

.notice-item-cat {
  grid-column: 1 / -1;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0;
}

.notice-item-title {
  font-size: clamp(18px, 2vw, 22px);
}

.notice-item-date {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0;
  white-space: nowrap;
}

.notice-item-body {
  max-width: 46em;
}

.notice-item-body p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.notice-item-more {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 12px;
}

.notice-item-more a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.notice-item-more a:hover,
.notice-item-more a:focus-visible {
  border-bottom-color: var(--accent);
}

.corrections {
  padding-top: 48px;
}

.correction-list {
  margin-top: 20px;
  border-top: 1px solid var(--rule);
}

.correction-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.correction-title {
  font-family: var(--serif);
  font-size: 16px;
  margin-bottom: 6px;
}

.correction-original,
.correction-fix {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.correction-fix {
  color: var(--ink);
}

.correction-date {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-top: 6px;
}

.notice-nav {
  padding-top: 48px;
}

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

.notice-nav-link {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.notice-nav-link:hover,
.notice-nav-link:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.notice-nav-label {
  display: block;
  font-family: var(--serif);
  font-size: 16px;
  margin-bottom: 6px;
}

.notice-nav-desc {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-notices .related-entry {
  margin-top: 48px;
}

/* ==========================================================================
   pages · 内容边界
   ========================================================================== */

.boundary-nature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: start;
  padding: 44px 0 0;
}

.boundary-nature .media-figure {
  aspect-ratio: 4 / 3;
}

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

.nature-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: var(--read);
  margin-top: 14px;
}

.nature-scope {
  padding: 12px 16px;
  background: var(--stage);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink);
}

.boundary-compare {
  padding-top: 48px;
}

.compare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 24px;
}

.compare-col {
  padding: 24px 26px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  min-width: 0;
}

.compare-col-can {
  border-top: 2px solid var(--accent);
}

.compare-col-cannot {
  border-top: 2px solid var(--ink-soft);
  background: var(--stage);
}

.compare-title {
  font-size: 17px;
  margin-bottom: 14px;
}

.compare-list > li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.compare-list > li:last-child {
  margin-bottom: 0;
}

.compare-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 1px;
  background: var(--accent);
}

.compare-col-cannot .compare-list > li::before {
  background: var(--ink-soft);
}

.boundary-citation {
  padding-top: 48px;
}

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

.citation-item {
  padding-left: 16px;
  border-left: 2px solid var(--rule);
  min-width: 0;
}

.citation-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.citation-item p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.boundary-correction {
  padding-top: 48px;
}

.boundary-correction .correction-item {
  padding: 20px 0;
}

.boundary-correction .correction-title {
  font-size: 16px;
}

.boundary-correction .correction-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: var(--read);
  margin-bottom: 8px;
}

.inline-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.inline-link:hover,
.inline-link:focus-visible {
  border-bottom-color: var(--accent);
}

.entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.entry-link:hover,
.entry-link:focus-visible {
  border-bottom-color: var(--accent);
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

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

.error-panel {
  max-width: 44em;
  padding: 40px 44px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--stage);
}

.error-code {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 12px;
}

.error-title {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.3;
  margin-bottom: 16px;
}

.error-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.error-list {
  margin-bottom: 26px;
}

.error-list > li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.error-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 1px;
  background: var(--accent);
}

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

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-size: 14px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

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

.error-btn-primary {
  background: var(--dark);
  border-color: var(--dark);
  color: var(--paper);
}

.error-btn-primary:hover,
.error-btn-primary:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

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

@media (max-width: 900px) {
  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 0 24px;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 12px 24px rgba(31, 29, 26, 0.08);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.26s ease;
  }

  .nav-list.is-open {
    max-height: 420px;
  }

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

  .nav-list > li:first-child {
    border-top: 0;
  }

  .nav-link {
    width: 100%;
    min-height: 48px;
    font-size: 14px;
    padding: 0;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link.is-current {
    color: var(--accent);
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
    padding: 40px 24px 36px;
  }

  .hero-returning {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
    padding-top: 24px;
  }

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

  .visit-item {
    padding: 20px 0;
  }

  .visit-item + .visit-item {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .featured-exhibit {
    padding: 40px 24px 8px;
  }

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

  .channel-index {
    padding: 40px 24px;
  }

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

  .channel-item:nth-child(3n + 2),
  .channel-item:nth-child(3n) {
    padding-left: 0;
    border-left: 0;
  }

  .channel-item:nth-child(even) {
    padding-left: 22px;
    border-left: 1px solid var(--rule);
  }

  .feature-band {
    padding: 0 24px 40px;
  }

  .feature-strip,
  .feature-strip-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .feature-strip-reverse .feature-media,
  .feature-strip-reverse .feature-body {
    order: 0;
  }

  .notice-guide-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    padding: 0 24px 40px;
  }

  .boundary-bar {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    margin-bottom: 40px;
    padding: 24px 24px;
  }

  .boundary-links {
    justify-content: flex-start;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 24px 32px;
  }

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

  .usage-grid,
  .method-list,
  .section-order .order-steps,
  .entry-steps,
  .anchor-list,
  .guide-notices .notice-list,
  .notice-nav-grid,
  .citation-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-entry,
  .channel-entry-reverse,
  .feature-unit,
  .feature-unit-reverse,
  .boundary-nature {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .channel-entry-reverse .channel-figure,
  .channel-entry-reverse .channel-body,
  .feature-unit-reverse .feature-media,
  .feature-unit-reverse .feature-body {
    order: 0;
  }

  .checklist,
  .record-list,
  .compare-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .compare-columns {
    gap: 20px;
  }

  .checklist-item {
    padding: 16px 0;
  }

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

  .notice-pinned {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    padding: 22px 24px;
  }

  .notice-item-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .notice-item-date {
    white-space: normal;
  }

  .error-panel {
    padding: 30px 26px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
    line-height: 1.8;
  }

  .header-inner {
    padding: 0 18px;
  }

  .brand-mark {
    font-size: 18px;
  }

  .brand-sub {
    font-size: 11px;
    letter-spacing: 0.1em;
  }

  .site-nav {
    padding: 0 18px;
  }

  .inner-main {
    padding: 0 18px 48px;
  }

  .breadcrumb {
    padding-top: 18px;
    font-size: 12px;
  }

  .page-header {
    padding: 10px 0 22px;
  }

  .page-title {
    font-size: clamp(24px, 6.4vw, 30px);
  }

  .hero {
    padding: 32px 18px 30px;
  }

  .hero-newcomer h1 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .hero-lead {
    font-size: 14px;
  }

  .hero-actions {
    gap: 10px;
  }

  .btn-primary,
  .btn-ghost {
    flex: 1 1 auto;
    min-height: 48px;
    padding: 0 18px;
    font-size: 13px;
  }

  .quick-entry {
    grid-template-columns: 32px minmax(0, 1fr);
    column-gap: 10px;
  }

  .visit-bar {
    padding: 0 18px;
  }

  .featured-exhibit {
    padding: 32px 18px 4px;
  }

  .exhibit-figure {
    aspect-ratio: 4 / 3;
  }

  .exhibit-caption {
    padding-top: 18px;
    margin-top: 18px;
  }

  .channel-index {
    padding: 32px 18px;
  }

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

  .channel-item,
  .channel-item:nth-child(even) {
    padding: 16px 0;
    border-left: 0;
  }

  .feature-band {
    padding: 0 18px 32px;
  }

  .feature-strip {
    padding: 24px 0;
  }

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

  .notice-guide-row {
    padding: 0 18px 32px;
    gap: 32px;
  }

  .boundary-bar {
    margin: 0 18px 32px;
    padding: 20px 20px;
  }

  .boundary-links {
    flex-direction: column;
    align-items: stretch;
  }

  .boundary-link {
    justify-content: center;
  }

  .footer-inner {
    padding: 32px 18px 26px;
  }

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

  .footer-list a {
    min-height: 44px;
  }

  .footer-copy {
    padding: 16px 18px;
    font-size: 11px;
  }

  .page-hero {
    padding: 24px 0 24px;
  }

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

  .catalog-usage,
  .section,
  .guide-checklist,
  .guide-entry,
  .guide-anchors,
  .guide-faq,
  .guide-record,
  .guide-notices,
  .boundary-compare,
  .boundary-citation,
  .boundary-correction {
    padding-top: 32px;
  }

  .guide-checklist .guide-figure {
    aspect-ratio: 16 / 10;
    margin-bottom: 20px;
  }

  .channel-figure,
  .feature-unit .feature-media,
  .boundary-nature .media-figure {
    aspect-ratio: 16 / 10;
  }

  .channel-entry,
  .feature-unit {
    padding: 24px 0;
  }

  .order-step,
  .entry-step,
  .usage-item,
  .anchor-item,
  .guide-notices .notice-item,
  .notice-nav-link {
    padding: 18px 18px;
  }

  .faq-question {
    font-size: 14px;
    padding-right: 30px;
  }

  .faq-answer {
    padding-right: 12px;
    font-size: 13px;
  }

  .notice-pinned {
    margin-top: 28px;
    padding: 20px 18px;
  }

  .page-notices .notice-list {
    padding-top: 32px;
  }

  .page-notices .notice-list .notice-item {
    padding: 22px 0;
  }

  .corrections,
  .notice-nav {
    padding-top: 32px;
  }

  .compare-col {
    padding: 20px 18px;
  }

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

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

  .error-actions {
    flex-direction: column;
  }

  .error-btn {
    width: 100%;
  }

  .related-entry {
    margin-top: 40px;
    padding-top: 24px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  .feature-strip:hover .feature-media img,
  .feature-unit:hover .feature-media img,
  a:hover .feature-media img {
    transform: none;
  }
}