/* ==========================================================================
   九九影视 · 全站样式表
   结构：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、排版
   -------------------------------------------------------------------------- */
:root {
  --bg: #f5f3ee;
  --surface: #fffdf8;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --line: #1a1a1a;
  --line-soft: #c9c4b8;
  --accent: #d94f2b;
  --accent-ink: #ffffff;
  --blue: #2b5f8a;
  --radius: 6px;
  --shell: 1120px;
  --gutter: 24px;
  --shadow-hard: 4px 4px 0 var(--line);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 800;
  line-height: 1.3;
}

p {
  margin: 0;
}

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

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

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

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

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout：骨架容器、页头、导航、主区、页脚
   -------------------------------------------------------------------------- */
.site-header {
  background: var(--surface);
  border-bottom: 3px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
  margin-right: auto;
}

.brand:hover,
.brand:focus-visible {
  color: var(--ink);
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.4;
}

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

.site-nav .nav-list li {
  display: block;
}

.site-nav .nav-list a {
  display: block;
  padding: 10px 12px;
  min-height: 44px;
  color: var(--ink);
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius);
}

.site-nav .nav-list a:hover,
.site-nav .nav-list a:focus-visible {
  color: var(--accent);
  border-color: var(--line);
  text-decoration: none;
}

.site-nav .nav-list a.is-current {
  font-weight: 800;
  color: var(--accent);
  border-color: var(--line);
  background: #f0e7df;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  height: 3px;
  background: var(--ink);
}

.nav-toggle::before {
  top: 15px;
  box-shadow: 0 8px 0 var(--ink);
}

.nav-toggle::after {
  bottom: 13px;
}

.site-main {
  display: block;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 32px var(--gutter) 48px;
}

.home-main {
  padding-top: 28px;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--blue);
  font-weight: 600;
}

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

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

/* 内页标题区 */
.page-header {
  border-bottom: 3px solid var(--line);
  padding-bottom: 20px;
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-description {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 820px;
}

/* 页脚 */
.site-footer {
  background: var(--surface);
  border-top: 3px solid var(--line);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px var(--gutter) 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}

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

.footer-title {
  font-size: 15px;
  font-weight: 800;
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--line);
}

.footer-text {
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-text a {
  font-weight: 600;
}

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

.footer-list a {
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

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

.footer-bottom {
  border-top: 2px solid var(--line-soft);
}

.footer-copy {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 24px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   components：按钮、卡片、步骤、表格、标签、FAQ、图注
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: var(--shadow-hard);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #b83f1f;
  color: var(--accent-ink);
}

.btn-outline {
  background: var(--surface);
  color: var(--ink);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: #efe6dd;
  color: var(--ink);
}

/* 通用卡片 */
.card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.card:hover {
  border-width: 3px;
  padding: 19px;
  background: #fff8f0;
}

.card-media {
  margin: 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #e8e3d8;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-title {
  font-size: 18px;
  font-weight: 800;
}

.card-text {
  font-size: 15px;
  color: var(--ink-soft);
}

.card-meta {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  border-top: 2px dashed var(--line-soft);
  padding-top: 8px;
}

.card-link {
  margin-top: auto;
  font-weight: 700;
  color: var(--accent);
  align-self: flex-start;
  padding: 6px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.card-link::after {
  content: " →";
}

/* 步骤清单 */
.step-list {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.step-item {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  flex: none;
}

.step-title {
  font-size: 17px;
  font-weight: 800;
}

.step-text {
  font-size: 15px;
  color: var(--ink-soft);
}

.step-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.field-table,
.data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-soft);
  border-bottom: 2px solid var(--line);
}

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

.field-table thead th,
.data-table thead th {
  background: #efe9de;
  font-weight: 800;
  border-bottom: 2px solid var(--line);
}

.field-table tbody th,
.data-table tbody th {
  font-weight: 700;
  white-space: nowrap;
}

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

/* 标签 */
.tag {
  display: inline-block;
  padding: 2px 10px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-new {
  background: var(--accent);
  color: var(--accent-ink);
}

.tag-adjust {
  background: var(--blue);
  color: #fff;
}

.tag-archive {
  background: var(--surface);
  color: var(--ink);
}

/* 折叠问答 */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.faq-question {
  cursor: pointer;
  list-style: none;
  padding: 16px 18px;
  min-height: 44px;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.faq-question::before {
  content: "+";
  flex: none;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.faq-item[open] .faq-question::before {
  content: "−";
  background: var(--accent);
}

.faq-answer {
  padding: 0 18px 18px 54px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* 图注 */
.media-caption,
.guide-figure figcaption,
.hero-media figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  padding-top: 8px;
}

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding-bottom: 36px;
  border-bottom: 3px solid var(--line);
}

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

.hero-kicker {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: #efe9de;
  font-size: 13px;
  font-weight: 800;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
}

.hero-lead {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 620px;
}

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

.hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 6px 0 0;
  border-top: 2px dashed var(--line-soft);
  padding-top: 16px;
}

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

.hero-fact dt {
  font-size: 13px;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 2px;
}

.hero-fact dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.hero-media {
  margin: 0;
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
  box-shadow: var(--shadow-hard);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
}

.section {
  padding: 40px 0;
  border-bottom: 2px solid var(--line-soft);
}

.section:last-of-type {
  border-bottom: 0;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 10px;
}

.section-desc {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 780px;
}

.card-grid {
  display: grid;
  gap: 20px;
}

.channel-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.collection-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.collection-card {
  border-top: 6px solid var(--accent);
}

.section-foot {
  margin-top: 22px;
  font-size: 15px;
  font-weight: 600;
}

.section-foot a {
  margin-right: 18px;
  display: inline-block;
  padding: 6px 0;
  min-height: 44px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.boundary-col {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.boundary-subtitle {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

/* --------------------------------------------------------------------------
   pages：频道分类
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 300px minmax(0, 1fr);
}

.layout-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-aside {
  min-width: 0;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  position: sticky;
  top: 96px;
}

.aside-title {
  font-size: 17px;
  font-weight: 800;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--line);
}

.aside-text {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.aside-list {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.aside-item a {
  display: block;
  padding: 10px 12px;
  min-height: 44px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  font-weight: 700;
  color: var(--ink);
  background: var(--bg);
}

.aside-item a:hover,
.aside-item a:focus-visible {
  background: #efe6dd;
  color: var(--accent);
  text-decoration: none;
}

.aside-note {
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 2px dashed var(--line-soft);
  padding-top: 12px;
}

.channel-overview,
.channel-fields,
.browse-path {
  min-width: 0;
}

.section-title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 10px;
}

.section-intro {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 780px;
  margin-bottom: 20px;
}

.channel-card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.channel-card:hover {
  border-width: 3px;
  padding: 17px;
  background: #fff8f0;
}

.channel-figure {
  margin: 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #e8e3d8;
}

.channel-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-name {
  font-size: 18px;
  font-weight: 800;
}

.channel-scope {
  font-size: 15px;
  color: var(--ink-soft);
}

.channel-direction {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
  border-top: 2px dashed var(--line-soft);
  padding-top: 8px;
}

.channel-link {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 0;
  font-weight: 700;
  color: var(--accent);
}

.channel-link::after {
  content: " →";
}

/* --------------------------------------------------------------------------
   pages：专题片单
   -------------------------------------------------------------------------- */
.section-collection-list .collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.section-collection-list .collection-card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.section-collection-list .collection-card:hover {
  border-width: 3px;
  background: #fff8f0;
}

.collection-media {
  margin: 0;
  border-bottom: 2px solid var(--line);
  aspect-ratio: 16 / 9;
  background: #e8e3d8;
}

.collection-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.collection-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.collection-name {
  font-size: 19px;
  font-weight: 800;
}

.collection-theme {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
}

.collection-scope,
.collection-direction {
  font-size: 15px;
  color: var(--ink-soft);
}

.collection-direction {
  border-top: 2px dashed var(--line-soft);
  padding-top: 8px;
  font-weight: 600;
  color: var(--blue);
}

.collection-link {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 0;
  font-weight: 700;
  color: var(--accent);
}

.collection-link::after {
  content: " →";
}

.section-reading-path .step-list {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* --------------------------------------------------------------------------
   pages：观看指南
   -------------------------------------------------------------------------- */
.guide-prep,
.guide-check,
.guide-scope,
.guide-faq,
.guide-next {
  padding: 32px 0;
  border-bottom: 2px solid var(--line-soft);
}

.guide-next {
  border-bottom: 0;
}

.guide-figure {
  margin: 0 0 22px;
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
  max-width: 720px;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
}

.prep-list {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.prep-item {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.prep-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  flex: none;
}

.prep-heading {
  font-size: 17px;
  font-weight: 800;
}

.prep-item p {
  font-size: 15px;
  color: var(--ink-soft);
}

.check-steps {
  display: grid;
  gap: 16px;
}

.check-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.check-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}

.check-heading {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 6px;
}

.check-step p {
  font-size: 15px;
  color: var(--ink-soft);
}

.check-point {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 2px dashed var(--line-soft);
  font-weight: 700;
  color: var(--blue);
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.scope-col {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
  background: var(--surface);
}

.scope-include {
  border-top: 6px solid var(--blue);
}

.scope-exclude {
  border-top: 6px solid var(--accent);
}

.scope-heading {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
}

.scope-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.scope-include .scope-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-weight: 800;
  color: var(--blue);
}

.scope-exclude .scope-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  font-weight: 800;
  color: var(--accent);
}

.next-links {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.next-item {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: var(--surface);
  min-width: 0;
}

.next-heading {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
}

.next-item p {
  font-size: 15px;
  color: var(--ink-soft);
}

.guide-feedback {
  margin-top: 24px;
  padding: 16px 18px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  background: #efe9de;
  font-size: 15px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages：变动记录
   -------------------------------------------------------------------------- */
.timeline-section,
.types-section,
.record-media-section,
.archive-section,
.related-section {
  padding: 32px 0;
  border-bottom: 2px solid var(--line-soft);
}

.related-section {
  border-bottom: 0;
}

.timeline-group {
  margin-bottom: 26px;
  padding-left: 18px;
  border-left: 4px solid var(--line);
}

.timeline-month {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 14px;
}

.timeline-list {
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-width: 0;
}

.timeline-item .tag {
  flex: none;
  margin-top: 2px;
}

.timeline-text {
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.type-card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.type-name {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
}

.type-desc {
  font-size: 15px;
  color: var(--ink-soft);
}

.record-media-section .media-figure {
  margin: 0 0 18px;
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
  max-width: 760px;
}

.record-media-section .media-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
}

.section-text {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 780px;
}

.archive-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.archive-item {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--surface);
  min-width: 0;
}

.archive-item a {
  display: inline-block;
  min-height: 32px;
  font-weight: 800;
  font-size: 16px;
}

.archive-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.related-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.related-item a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 16px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  font-weight: 700;
  color: var(--ink);
}

.related-item a:hover,
.related-item a:focus-visible {
  background: #efe6dd;
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  padding-top: 56px;
  padding-bottom: 72px;
}

.error-block {
  max-width: 640px;
  border: 3px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
  padding: 32px;
}

.error-block h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.error-text {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.error-action {
  margin-top: 12px;
}

/* --------------------------------------------------------------------------
   responsive：断点
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-aside {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 16px;
  }

  .header-inner {
    flex-wrap: wrap;
    align-items: center;
  }

  .nav-toggle {
    display: block;
    flex: none;
    margin-left: auto;
  }

  .site-nav {
    flex-basis: 100%;
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding-top: 12px;
  }

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

  .site-nav .nav-list a {
    width: 100%;
    padding: 12px 14px;
    border-color: var(--line);
    background: var(--bg);
  }

  .site-main {
    padding: 20px var(--gutter) 40px;
  }

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

  .hero-title {
    font-size: 28px;
  }

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

  .section-title,
  .section-head h2 {
    font-size: 20px;
  }

  .section {
    padding: 30px 0;
  }

  .step-list,
  .prep-list,
  .channel-grid,
  .collection-grid,
  .section-collection-list .collection-grid,
  .scope-columns,
  .type-grid,
  .archive-list,
  .related-list,
  .next-links,
  .hero-facts {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .faq-answer {
    padding-left: 18px;
  }

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

  .error-block {
    padding: 24px;
  }

  .error-block h1 {
    font-size: 26px;
  }
}

@media (max-width: 420px) {
  .brand-name {
    font-size: 19px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    gap: 10px;
  }
}