/* ==========================================================================
   天美影业 · 站点样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

:root {
  --paper: #F6F4EF;
  --ink: #1E1C19;
  --ink-soft: #5C5750;
  --green: #2C4A3B;
  --orange: #B4571F;
  --line: #DAD4C8;
  --card: #FFFDF8;
  --panel: #F1EEE7;
  --img-bg: #EDE9E0;

  --font-serif: "Songti SC", "Source Han Serif SC", SimSun, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;

  --container: 1160px;
  --reading: 760px;
  --radius: 2px;

  --header-h: 72px;
  --header-h-tight: 56px;
}

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

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

body.site-body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0 0 1em;
}

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

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

a {
  color: var(--green);
  text-decoration: none;
}

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

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

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

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--green);
  color: #FFFFFF;
  border-radius: var(--radius);
  transition: top 0.18s ease;
}

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


/* --------------------------------------------------------------------------
   2. layout
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.site-main {
  display: block;
  padding-bottom: 8px;
}

.inner-main {
  padding-top: 24px;
}

.section {
  padding: 64px 0;
}

.content-section {
  padding: 56px 0;
}

.section-alt {
  background-color: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: var(--reading);
  margin-bottom: 32px;
}

.section-heading {
  font-size: 26px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 26px;
  margin-bottom: 10px;
}

.section-desc {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}

.section-intro {
  max-width: var(--reading);
  color: var(--ink-soft);
  margin: 0 0 28px;
}

.section-lead {
  max-width: var(--reading);
  color: var(--ink-soft);
  margin: 0 0 28px;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--green);
  font-family: var(--font-sans);
  font-weight: 600;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.link-arrow::after {
  content: "→";
  font-size: 13px;
}

.link-arrow:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background-color: var(--orange);
  color: #FFF9F2;
  border-color: var(--orange);
}

.btn-primary:hover {
  background-color: #9C4A19;
  border-color: #9C4A19;
  color: #FFF9F2;
}

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

.btn-ghost:hover {
  background-color: var(--green);
  color: var(--paper);
}


/* --------------------------------------------------------------------------
   3. components
   -------------------------------------------------------------------------- */

/* 3.1 页头与导航 ---------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  min-height: var(--header-h);
  gap: 24px;
  transition: min-height 0.2s ease;
}

.site-header.is-tight .header-inner {
  min-height: var(--header-h-tight);
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 0 0 auto;
  gap: 2px;
  color: var(--ink);
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink);
}

.brand-slogan {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  line-height: 1.3;
}

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

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

.nav-item {
  display: flex;
}

.nav-item a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.nav-item a:hover {
  color: var(--green);
}

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

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

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background-color: var(--ink);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* 3.2 面包屑与页面标题区 -------------------------------------------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 4px 32px 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 32px 0;
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 36px);
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}

.page-hero {
  padding: 28px 0 8px;
}

.page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 40px;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

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

.page-hero-lead,
.page-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0;
}

.page-hero-figure,
.page-hero-media {
  margin: 0;
  min-width: 0;
}

.page-hero-figure img,
.page-hero-media img {
  width: 100%;
  height: 100%;
  max-height: 300px;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--img-bg);
}

.page-hero-figure figcaption,
.page-hero-media figcaption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* 3.3 概览格 -------------------------------------------------------------- */

.overview-strip,
.overview {
  padding: 32px 0;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.overview-cell,
.overview-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.overview-title,
.overview-cell-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}

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

/* 3.4 锚点索引条 ---------------------------------------------------------- */

.anchor-index,
.page-index {
  padding: 0 0 8px;
}

.anchor-index .container,
.page-index .container {
  max-width: var(--container);
}

.anchor-list,
.anchor-index-list,
.page-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.anchor-list li,
.anchor-index-list li,
.page-index-list li {
  display: flex;
}

.anchor-list a,
.anchor-index-list a,
.page-index-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--ink-soft);
}

.anchor-list a:hover,
.anchor-index-list a:hover,
.page-index-list a:hover {
  color: var(--orange);
}

.anchor-index-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.anchor-index-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--green);
  font-weight: 600;
}

.anchor-index-inner .anchor-index-list {
  padding: 0;
  border: 0;
}

/* 3.5 表格 ---------------------------------------------------------------- */

.table-scroll {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.6;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  background-color: var(--panel);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--green);
  white-space: nowrap;
}

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

.data-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.data-table tbody td {
  color: var(--ink-soft);
}

.table-hint {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* 3.6 步骤条 -------------------------------------------------------------- */

.step-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

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

.step-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  border-radius: var(--radius);
}

.step-bar .step-num,
.step-list .step-num,
.step-list .step-index,
.step-list .step-no {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--orange);
  margin-bottom: 8px;
}

.step-item .step-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
}

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

/* 3.7 折叠问答 ------------------------------------------------------------ */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--reading);
  border-top: 1px solid var(--line);
}

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

.faq-question,
.faq-item summary {
  position: relative;
  display: block;
  padding: 16px 40px 16px 0;
  min-height: 44px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after,
.faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.18s ease;
}

details[open] > .faq-question::after,
details[open] > summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

.faq-answer,
.faq-item > p {
  padding: 0 40px 18px 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-answer p {
  margin: 0 0 0.6em;
}

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

/* 3.8 延伸入口组 ---------------------------------------------------------- */

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

.next-card,
.related-card,
.extend-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.next-card:hover,
.related-card:hover,
.extend-card:hover {
  border-color: var(--green);
  transform: translateX(2px);
}

.next-card-title,
.related-card h3,
.related-title,
.extend-card h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

.next-card-desc,
.related-card p,
.related-desc,
.extend-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 32px 40px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--green);
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--green);
}

/* 3.9 页脚 ---------------------------------------------------------------- */

.site-footer {
  margin-top: 48px;
  background-color: var(--panel);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 32px;
}

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

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
}

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

.footer-title {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  margin: 0 0 12px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

.footer-boundary p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  padding-bottom: 24px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}


/* --------------------------------------------------------------------------
   4. pages
   -------------------------------------------------------------------------- */

/* 4.1 首页 ---------------------------------------------------------------- */

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

.hero {
  padding: 40px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 480px);
  gap: 48px;
  align-items: center;
}

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

.notice-bar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 0 24px;
  padding: 0 0 0 14px;
  border-left: 2px solid var(--orange);
}

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

.hero-text h1 {
  font-size: clamp(30px, 4.2vw, 44px);
  font-weight: 600;
  line-height: 1.28;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 26px;
}

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

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

.hero-media img {
  width: 100%;
  height: 100%;
  max-height: 420px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--img-bg);
}

.media-caption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* 参观信息四格 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.info-cell {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  border-radius: var(--radius);
}

.info-cell h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}

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

/* 题材频道目录 */
.exhibit-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.exhibit-row {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.exhibit-row:hover {
  border-color: var(--green);
  transform: translateX(2px);
}

.exhibit-row.is-reversed {
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
}

.exhibit-row.is-reversed .exhibit-media {
  order: 2;
}

.exhibit-row.is-reversed .exhibit-label {
  order: 1;
}

.exhibit-row .exhibit-media {
  margin: 0;
  min-width: 0;
}

.exhibit-row .exhibit-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--img-bg);
}

.exhibit-row .exhibit-label {
  min-width: 0;
}

.exhibit-tag {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--green);
  font-weight: 600;
  margin: 0 0 8px;
}

.exhibit-row .exhibit-label h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.exhibit-row .exhibit-label p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

/* 年份编年入口 */
.timeline-entry {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-color: var(--panel);
}

.timeline-entry .year-axis {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.timeline-entry .year-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  min-height: 44px;
  padding: 0 16px;
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink-soft);
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: color 0.16s ease, border-color 0.16s ease;
}

.timeline-entry .year-node:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.timeline-entry .year-node.is-active {
  color: var(--green);
  font-weight: 600;
  border-color: var(--green);
  border-bottom-width: 2px;
}

.timeline-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  max-width: var(--reading);
}

.timeline-note p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
  flex: 1 1 320px;
}

/* 专题片单精选 */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.collection-card:hover {
  border-color: var(--green);
  transform: translateX(2px);
}

.collection-media {
  margin: 0;
}

.collection-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background-color: var(--img-bg);
}

.collection-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
}

.collection-body h3 {
  font-size: 18px;
}

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

/* 创作手记摘录 */
.notes-layout {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.notes-intro {
  min-width: 0;
}

.notes-intro h2 {
  font-size: 26px;
  margin-bottom: 12px;
}

.notes-intro p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

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

.note-item {
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-left: 2px solid var(--green);
  border-radius: var(--radius);
}

.note-item h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.note-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

/* 延伸入口组（首页四张卡，按两列排布，避免末行落单） */
.more-section .more-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.more-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.more-card:hover {
  border-color: var(--green);
  transform: translateX(2px);
}

/* 4.2 作品档案页 ---------------------------------------------------------- */

.channel-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.channel-row:hover {
  border-color: var(--green);
  transform: translateX(2px);
}

.channel-row.is-reversed {
  grid-template-columns: minmax(0, 1fr) minmax(0, 200px);
}

.channel-row.is-reversed .channel-media {
  order: 2;
}

.channel-row.is-reversed .channel-body {
  order: 1;
}

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

.channel-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--img-bg);
}

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

.channel-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 6px;
}

.channel-rule {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.channel-link:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.reading-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--reading);
}

.reading-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.reading-step:first-child {
  border-top: 1px solid var(--line);
}

.reading-step .step-num {
  grid-row: 1 / 3;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--orange);
  margin: 0;
}

.reading-step .step-title {
  grid-column: 2;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
}

.reading-step p {
  grid-column: 2;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

/* 4.3 年份编年页 ---------------------------------------------------------- */

.year-axis-scroll {
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 28px;
  -webkit-overflow-scrolling: touch;
}

.year-axis-scroll .year-axis {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  min-width: max-content;
  margin: 0;
  padding: 0;
}

.year-axis-scroll .year-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  min-height: 56px;
  padding: 8px 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink-soft);
}

.year-axis-scroll .year-node.is-active {
  color: var(--green);
  font-weight: 600;
  border-color: var(--green);
  border-bottom-width: 2px;
}

.year-node-label {
  display: block;
  line-height: 1.3;
}

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

.year-node-info {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.year-node-info-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.rule-block {
  max-width: var(--reading);
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius);
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rule-item {
  min-width: 0;
}

.rule-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* 4.4 专题片单页 ---------------------------------------------------------- */

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

.logic-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  border-radius: var(--radius);
}

.logic-item h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.exhibit-block {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr) minmax(0, 260px);
  gap: 28px;
  align-items: start;
  padding: 24px;
  margin-bottom: 28px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.exhibit-block:last-child {
  margin-bottom: 0;
}

.exhibit-block .exhibit-media {
  margin: 0;
  min-width: 0;
}

.exhibit-block .exhibit-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--img-bg);
}

.exhibit-block .exhibit-label {
  min-width: 0;
}

.exhibit-block .exhibit-label h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.exhibit-block .exhibit-label p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.exhibit-block .exhibit-list {
  min-width: 0;
}

.exhibit-block .exhibit-list h4 {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  margin: 0 0 10px;
}

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

.entry-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  background-color: var(--green);
  border-radius: 50%;
}

.entry-note {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
}

/* 4.5 创作手记页 ---------------------------------------------------------- */

.method-steps .step-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.journal {
  padding: 56px 0;
}

.journal-entry {
  max-width: var(--reading);
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.journal-entry:last-child {
  border-bottom: 1px solid var(--line);
}

.journal-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.journal-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 0.8em;
}

.journal-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--green);
  font-weight: 600;
  margin: 8px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--green);
}

.revision {
  padding: 56px 0;
  background-color: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--reading);
}

.check-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-box {
  display: block;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border: 2px solid var(--green);
  border-radius: var(--radius);
}

.check-content {
  min-width: 0;
}

.check-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

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

.revision-tip {
  max-width: var(--reading);
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.revision-tip a {
  color: var(--green);
  border-bottom: 1px solid var(--line);
}

.revision-tip a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* 4.6 观看指南页 ---------------------------------------------------------- */

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

.clue-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  border-radius: var(--radius);
}

.clue-name {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: var(--reading);
}

.checklist-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px;
  min-height: 44px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.16s ease;
}

.checklist-item:hover {
  border-color: var(--green);
}

.checklist-box {
  display: block;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 2px solid var(--green);
  border-radius: var(--radius);
  background-color: transparent;
  transition: background-color 0.16s ease;
}

.checklist-item.is-checked .checklist-box {
  background-color: var(--green);
}

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

.checklist-name {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* 4.7 合作方式页 ---------------------------------------------------------- */

.matter-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.matter-card {
  min-width: 0;
  padding: 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  border-radius: var(--radius);
}

.matter-card h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--reading);
  border-top: 1px solid var(--line);
}

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

.spec-item h3 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

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

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

.spec-item a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.boundary-block {
  padding: 24px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  border-radius: var(--radius);
}

.boundary-block h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

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

.boundary-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 2px;
  background-color: var(--orange);
}

/* 4.8 站点地图页 ---------------------------------------------------------- */

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

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

.index-column-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  margin-bottom: 12px;
}

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

.index-link-list li {
  min-width: 0;
}

.index-link-list a {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.index-link-list a:hover {
  color: var(--orange);
}

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

.browse-paths {
  padding: 56px 0;
}

.browse-path {
  max-width: var(--reading);
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.browse-path:last-child {
  border-bottom: 1px solid var(--line);
}

.browse-path-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.browse-path-steps {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: browse;
}

.browse-path-steps li {
  position: relative;
  padding-left: 28px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  counter-increment: browse;
}

.browse-path-steps li::before {
  content: counter(browse);
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 50%;
}

.browse-path-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
}

.browse-path-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
  border-bottom: 1px solid var(--line);
}

.browse-path-links a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.statement {
  padding: 48px 0;
  background-color: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.statement-block {
  max-width: var(--reading);
  padding: 20px 0 0;
  border-top: 2px solid var(--green);
}

.statement-block p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 0.8em;
}

/* 4.9 404 页 -------------------------------------------------------------- */

.error-main {
  padding: 80px 0 64px;
}

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

.error-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 12px;
}

.error-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.error-help {
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

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

.error-help-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.error-links li {
  display: flex;
}

.error-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: var(--green);
  border-bottom: 1px solid var(--line);
}

.error-links a:hover {
  color: var(--orange);
  border-color: var(--orange);
}


/* --------------------------------------------------------------------------
   5. responsive
   -------------------------------------------------------------------------- */

/* 5.1 1160px 以下 */
@media (max-width: 1160px) {
  .container {
    padding: 0 28px;
  }

  .breadcrumb,
  .page-header {
    padding-left: 28px;
    padding-right: 28px;
  }

  .page-hero-inner,
  .overview-grid,
  .related-links {
    padding-left: 28px;
    padding-right: 28px;
  }

  .hero-inner {
    gap: 36px;
  }

  .exhibit-block {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  }

  .exhibit-block .exhibit-list {
    grid-column: 1 / -1;
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }
}

/* 5.2 900px 以下 */
@media (max-width: 900px) {
  .site-header .header-inner {
    min-height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background-color: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 16px rgba(30, 28, 25, 0.06);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
  }

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

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

  .nav-item:last-child {
    border-bottom: 0;
  }

  .nav-item a {
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 0;
  }

  .nav-item.is-current a,
  .nav-item a.is-current {
    border-bottom: 0;
    padding-left: 10px;
    border-left: 2px solid var(--green);
  }

  .hero {
    padding: 28px 0 36px;
  }

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

  .hero-media img {
    max-height: 340px;
  }

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

  .exhibit-row,
  .exhibit-row.is-reversed {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .exhibit-row.is-reversed .exhibit-media {
    order: 1;
  }

  .exhibit-row.is-reversed .exhibit-label {
    order: 2;
  }

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

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

  .step-bar,
  .step-list,
  .method-steps .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-hero-figure img,
  .page-hero-media img {
    max-height: 260px;
  }

  .overview-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .channel-row,
  .channel-row.is-reversed {
    grid-template-columns: minmax(0, 160px) minmax(0, 1fr);
    gap: 18px;
  }

  .channel-row.is-reversed .channel-media {
    order: 1;
  }

  .channel-row.is-reversed .channel-body {
    order: 2;
  }

  .logic-grid,
  .clue-grid,
  .year-node-info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .next-grid,
  .related-grid,
  .extend-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .exhibit-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .exhibit-block .exhibit-media img {
    aspect-ratio: 16 / 10;
    max-height: 260px;
  }

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

/* 5.3 640px 以下 */
@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }

  .breadcrumb,
  .page-header {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-hero-inner,
  .overview-grid,
  .related-links {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section,
  .content-section {
    padding: 40px 0;
  }

  .section-heading,
  .section-title {
    font-size: 22px;
  }

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

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

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

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

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

  .step-bar,
  .step-list,
  .method-steps .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .logic-grid,
  .clue-grid,
  .year-node-info-grid,
  .matter-grid,
  .index-columns-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .timeline-entry .year-axis {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .timeline-entry .year-node {
    flex: 0 0 auto;
  }

  .anchor-list,
  .anchor-index-list,
  .page-index-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 10px;
    -webkit-overflow-scrolling: touch;
  }

  .anchor-list li,
  .anchor-index-list li,
  .page-index-list li {
    flex: 0 0 auto;
  }

  .anchor-index-inner {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .anchor-index-label {
    flex: 0 0 auto;
  }

  .timeline-note {
    gap: 14px;
  }

  .reading-step {
    grid-template-columns: 36px minmax(0, 1fr);
    column-gap: 12px;
  }

  .reading-step .step-num {
    font-size: 18px;
  }

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

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

  .error-main {
    padding: 48px 0 40px;
  }

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

  .error-actions .btn {
    width: 100%;
  }

  .boundary-block {
    padding: 20px;
  }

  .rule-block {
    padding: 16px;
  }

  .exhibit-block {
    padding: 16px;
  }
}

/* 5.4 减少动效偏好 */
@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) {
  .more-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}