/* ===== base ===== */
:root {
  --paper: #F4F1E9;
  --ink: #171717;
  --green: #1E6B52;
  --orange: #E4572E;
  --blue: #2457A6;
  --mustard: #D7A928;
  --gray: #6B6B63;
  --line: #D8D2C4;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1120px;
  --pad: 32px;
}

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

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

body.site-body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.3;
  margin: 0;
}

p {
  margin: 0;
}

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

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

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

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

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

/* ===== layout ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 72px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  flex-shrink: 0;
  min-height: 44px;
}

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

.brand-mark {
  width: 26px;
  height: 26px;
  background: var(--green);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 58% 100%, 0 100%);
  flex-shrink: 0;
}

.brand-name {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.02em;
}

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  color: var(--ink);
  font-size: 15px;
  border-bottom: 3px solid transparent;
}

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

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

.quick-jump-btn {
  flex-shrink: 0;
  height: 44px;
  padding: 0 16px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.quick-jump-btn:hover {
  background: var(--green);
  border-color: var(--green);
}

.menu-toggle {
  display: none;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: 4px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

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

.mobile-nav {
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}

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

.mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 4px;
  color: var(--ink);
  font-size: 16px;
  border-bottom: 1px solid var(--line);
}

.mobile-nav-link.is-current {
  color: var(--green);
  font-weight: 700;
}

.quick-jump-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(420px, 92vw);
  background: var(--paper);
  border-left: 3px solid var(--ink);
  z-index: 100;
  overflow-y: auto;
  padding: 24px;
}

.quick-jump-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.quick-jump-title {
  font-size: 20px;
}

.quick-jump-close {
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: 4px;
  font-size: 20px;
  line-height: 1;
  color: var(--ink);
  flex-shrink: 0;
}

.quick-jump-close:hover {
  background: var(--ink);
  color: var(--paper);
}

.quick-jump-body {
  display: grid;
  gap: 24px;
}

.quick-jump-group-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.quick-jump-list {
  display: grid;
  gap: 2px;
}

.quick-jump-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 8px;
  color: var(--ink);
  border-left: 3px solid var(--line);
}

.quick-jump-list a:hover {
  background: #fff;
  border-left-color: var(--green);
  color: var(--green);
}

.site-main {
  display: block;
}

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
}

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

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

/* ===== components ===== */
.section-title {
  font-size: 26px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-bar {
  display: inline-block;
  width: 6px;
  height: 24px;
  background: var(--green);
  flex-shrink: 0;
}

.section-lead {
  max-width: 760px;
  color: var(--gray);
  margin-top: 10px;
}

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

.section-desc {
  max-width: 760px;
  color: var(--gray);
  margin-top: 10px;
}

.section-sub {
  color: var(--gray);
  margin-top: 8px;
  max-width: 760px;
}

.figure-caption,
.media-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--gray);
  margin-top: 8px;
  line-height: 1.6;
}

.media-frame {
  margin: 0;
}

.media-frame img,
.figure img,
.hero-figure img,
.card-figure img,
.route-figure img,
.rule-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 15px;
  border: 2px solid var(--ink);
}

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

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

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

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

.text-link {
  color: var(--green);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 2px solid var(--green);
}

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

.link-arrow {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--green);
  font-weight: 700;
}

.link-arrow::after {
  content: "→";
  margin-left: 6px;
}

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

.btn-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--green);
  color: #fff;
  border-radius: 4px;
  font-weight: 700;
  font-size: 14px;
  border: 2px solid var(--green);
}

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

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

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

/* 图片框 */
.card-figure,
.route-figure,
.guide-figure,
.rule-figure,
.clue-figure {
  margin: 0;
}

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

.guide-figure img,
.rule-figure img {
  aspect-ratio: 4 / 3;
}

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

/* 面包屑与标题区 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--gray);
}

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

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

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

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

.page-header {
  padding: 18px 0 26px;
  border-bottom: 3px solid var(--ink);
  margin-bottom: 40px;
}

.page-title {
  font-size: 40px;
  line-height: 1.2;
}

/* 内页标题区 */
.page-title-block,
.page-title-area,
.page-hero-inner,
.page-head {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(260px, 4fr);
  gap: 40px;
  align-items: start;
  padding: 32px 0 40px;
  margin-bottom: 8px;
}

.page-title-text,
.page-title-main,
.page-hero-main,
.page-head-main {
  min-width: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.eyebrow-bar {
  display: inline-block;
  width: 18px;
  height: 3px;
  background: var(--orange);
}

.page-lead,
.page-hero-lead,
.page-hero-text {
  font-size: 17px;
  color: #3a3a35;
  max-width: 760px;
  margin-top: 14px;
}

.page-scope-card,
.scope-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 20px;
}

.scope-title,
.scope-card-title,
.scope-card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 12px;
  font-weight: 700;
}

.scope-list,
.scope-card-list {
  display: grid;
  gap: 10px;
}

.scope-list li,
.scope-card-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.scope-list li:last-child,
.scope-card-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.scope-key,
.scope-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.03em;
}

.scope-val,
.scope-value {
  color: var(--ink);
}

/* 表格 */
.table-scroll {
  overflow-x: auto;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: #fff;
}

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

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

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  text-transform: uppercase;
}

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

.table-hint {
  font-size: 13px;
  color: var(--gray);
  margin-top: 10px;
  font-family: var(--font-mono);
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 0 20px;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--green);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 0 20px;
  color: #3a3a35;
  max-width: 760px;
}

/* 信息条 */
.info-note,
.notice-item {
  border-left: 4px solid var(--blue);
  background: #fff;
  padding: 14px 18px;
  border-radius: 0 4px 4px 0;
  font-size: 14px;
  color: #3a3a35;
}

.notice-warn {
  border-left-color: var(--orange);
}

/* ===== pages: 首页 ===== */
.hero {
  padding: 40px 0 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: start;
}

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

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: 0;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 17px;
  color: #3a3a35;
  max-width: 620px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-scope {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-scope-item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--gray);
  background: #fff;
}

.hero-figure {
  margin: 0;
  border: 2px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.hero-figure img {
  aspect-ratio: 4 / 3;
  border: 0;
  border-radius: 0;
}

.hero-figure .figure-caption {
  padding: 10px 14px;
  margin: 0;
  border-top: 2px solid var(--ink);
}

.hero-note {
  margin-top: 24px;
  padding: 12px 18px;
  border-left: 4px solid var(--orange);
  background: #fff;
  font-size: 14px;
  color: #3a3a35;
}

.usage-filter {
  padding: 56px 0 0;
}

.usage-filter-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.usage-filter-item {
  min-width: 0;
}

.usage-filter-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 88px;
  padding: 16px 18px;
  background: #fff;
  border: 2px solid var(--ink);
  border-left: 6px solid var(--green);
  border-radius: 4px;
  color: var(--ink);
}

.usage-filter-link:hover {
  border-left-color: var(--orange);
  background: #fffdf6;
}

.usage-filter-name {
  font-weight: 800;
  font-size: 16px;
}

.usage-filter-desc {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.5;
}

.update-log {
  padding: 56px 0 0;
}

.update-list {
  margin-top: 20px;
  border-top: 2px solid var(--ink);
}

.update-item {
  display: grid;
  grid-template-columns: 110px 130px 1fr;
  gap: 20px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.update-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray);
  letter-spacing: 0.04em;
}

.update-type {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 2px 10px;
  background: var(--mustard);
  color: var(--ink);
  border-radius: 3px;
  justify-self: start;
}

.update-link {
  color: var(--ink);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.update-link:hover {
  color: var(--green);
}

.featured {
  padding: 56px 0 0;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.featured-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 16px;
  min-width: 0;
}

.card-figure {
  border: 2px solid var(--ink);
  border-radius: 4px;
  overflow: hidden;
}

.card-figure img {
  border: 0;
  border-radius: 0;
}

.card-figure .figure-caption {
  padding: 6px 10px;
  margin: 0;
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  padding-top: 4px;
}

.card-title {
  font-size: 19px;
}

.card-desc {
  font-size: 14px;
  color: #3a3a35;
  flex: 1;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
}

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

.channel-band {
  padding: 56px 0 0;
}

.channel-list {
  margin-top: 24px;
  border-top: 2px solid var(--ink);
}

.channel-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 140px auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.channel-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  letter-spacing: 0.04em;
}

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

.channel-name {
  font-size: 18px;
  margin-bottom: 4px;
}

.channel-desc {
  font-size: 14px;
  color: var(--gray);
  max-width: 640px;
}

.channel-usage {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: var(--mustard);
  padding: 4px 10px;
  border-radius: 3px;
  justify-self: start;
  white-space: nowrap;
}

.channel-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
}

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

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

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.scene-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 22px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scene-name {
  font-size: 20px;
}

.scene-duration {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--blue);
}

.scene-standard,
.scene-entry,
.scene-note {
  font-size: 14px;
  color: #3a3a35;
}

.scene-standard strong,
.scene-entry strong,
.scene-note strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.scene-note {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  color: var(--gray);
}

.topic-routes {
  padding: 56px 0 0;
}

.route-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.route-block {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  border-top: 6px solid var(--blue);
}

.route-block-wide {
  border-top-color: var(--green);
}

.route-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.route-name {
  font-size: 20px;
}

.route-summary {
  font-size: 14px;
  color: #3a3a35;
  flex: 1;
}

.route-structure {
  font-size: 13px;
  color: var(--gray);
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.route-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 700;
  font-size: 14px;
  color: var(--green);
}

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

.viewing-order {
  padding: 56px 0 0;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.step-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 18px;
  min-width: 0;
}

.step-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--orange);
  margin-bottom: 8px;
}

.step-name {
  font-size: 17px;
  margin-bottom: 6px;
}

.step-desc {
  font-size: 14px;
  color: var(--gray);
}

.rules-summary {
  padding: 56px 0 0;
}

.rules-desc {
  color: var(--gray);
  max-width: 760px;
  margin-top: 10px;
}

.rules-list {
  margin-top: 24px;
  border-top: 2px solid var(--ink);
}

.rules-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.rules-name {
  font-size: 17px;
  font-weight: 700;
}

.rules-name span {
  font-family: var(--font-mono);
  color: var(--orange);
  font-size: 14px;
  margin-right: 10px;
}

.section-more {
  margin-top: 20px;
}

.correction-band {
  margin: 56px 0 0;
  padding: 28px;
  background: #fff;
  border: 2px solid var(--ink);
  border-left: 8px solid var(--orange);
  border-radius: 6px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}

.correction-text {
  font-size: 15px;
  color: #3a3a35;
  max-width: 640px;
}

.correction-desc {
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 6px;
}

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

/* ===== pages: 频道地图 ===== */
.section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

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

.section-guide .guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 32px;
  align-items: start;
}

.guide-notes {
  display: grid;
  gap: 16px;
}

.guide-note {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 18px 20px;
}

.guide-note-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.guide-note-text {
  font-size: 14px;
  color: #3a3a35;
}

.section-channels .channel-list {
  margin-top: 8px;
}

.section-channels .channel-row {
  display: block;
  padding: 0;
  border-bottom: 0;
}

.channel-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

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

.channel-body .channel-name {
  font-size: 19px;
  margin-bottom: 6px;
}

.channel-scope {
  font-size: 14px;
  color: #3a3a35;
  max-width: 680px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--gray);
  background: #fff;
}

.channel-item .channel-links {
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 4px;
}

.scene-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
}

.scene-title {
  font-size: 19px;
}

.scene-criteria,
.scene-next,
.scene-caution {
  font-size: 14px;
  color: #3a3a35;
}

.scene-next a {
  font-weight: 700;
}

.scene-caution {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  color: var(--gray);
}

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

.step-strip .step-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-top: 6px solid var(--green);
  border-radius: 6px;
  padding: 18px;
  min-width: 0;
}

.step-strip .step-no {
  font-size: 22px;
  margin-bottom: 6px;
}

.step-strip .step-name {
  font-size: 16px;
}

.step-text {
  font-size: 14px;
  color: var(--gray);
}

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

.related-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.related-title {
  font-size: 18px;
}

.related-text,
.related-desc {
  font-size: 14px;
  color: #3a3a35;
  flex: 1;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  margin-top: 32px;
}

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

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
}

.related-links-item:hover {
  color: var(--orange);
}

/* ===== pages: 专题航线 ===== */
.page-hero {
  padding: 0;
}

.page-hero-inner {
  padding-bottom: 32px;
}

.section-summary .section-head,
.section-toc .section-head,
.section-routes .section-head,
.section-order .section-head,
.section-sources .section-head,
.section-related .section-head {
  margin-bottom: 16px;
}

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

.summary-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.summary-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

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

.summary-who,
.summary-order {
  font-size: 14px;
  color: #3a3a35;
}

.summary-order {
  color: var(--gray);
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.section-toc {
  border-top: 3px solid var(--ink);
  border-bottom: 1px solid var(--line);
  padding: 32px 0;
}

.toc-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.toc-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 16px;
  background: #fff;
  border: 2px solid var(--ink);
  border-left: 6px solid var(--blue);
  border-radius: 4px;
  color: var(--ink);
  font-weight: 700;
  font-size: 15px;
}

.toc-item a:hover {
  border-left-color: var(--orange);
  color: var(--green);
}

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

.route-list {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.route-entry {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: 32px;
  align-items: start;
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 24px;
}

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

.route-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  margin-bottom: 6px;
}

.route-body .route-name {
  font-size: 22px;
  margin-bottom: 14px;
}

.route-field {
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.route-field-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 4px;
}

.route-field-text {
  font-size: 14px;
  color: #3a3a35;
}

.route-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.step-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.step-row .step-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 18px;
  min-width: 0;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--orange);
  margin-bottom: 6px;
}

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

.source-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-left: 6px solid var(--green);
  border-radius: 4px;
  padding: 18px 20px;
  min-width: 0;
}

.source-name {
  font-size: 17px;
  margin-bottom: 6px;
}

.source-text {
  font-size: 14px;
  color: #3a3a35;
}

/* ===== pages: 作品索引 ===== */
.tip-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.tip-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 20px;
  min-width: 0;
}

.tip-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  margin-bottom: 6px;
}

.tip-card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.tip-card p {
  font-size: 14px;
  color: #3a3a35;
}

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

.section-alt {
  background: #efece2;
}

.type-index-list {
  margin-top: 20px;
  border-top: 2px solid var(--ink);
}

.type-index-row {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) 130px 120px 100px;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.type-index-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.04em;
}

.type-index-body {
  min-width: 0;
}

.type-index-name {
  font-size: 16px;
  margin-bottom: 2px;
}

.type-index-desc {
  font-size: 13px;
  color: var(--gray);
}

.type-index-channel,
.type-index-topic {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.type-index-status {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 3px;
  font-family: var(--font-mono);
  justify-self: start;
  white-space: nowrap;
}

.is-complete {
  background: var(--green);
  color: #fff;
}

.is-pending {
  background: var(--mustard);
  color: var(--ink);
}

.notice-stack {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

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

.link-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 20px;
  min-width: 0;
}

.link-card-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.link-card-desc {
  font-size: 14px;
  color: #3a3a35;
  margin-bottom: 8px;
}

.link-card-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
}

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

/* ===== pages: 观看路径 ===== */
.page-head {
  padding-bottom: 32px;
}

.scene-section .section-head,
.steps-section .section-head,
.device-section .section-head,
.checklist-section .section-head,
.faq-section .section-head,
.related-section .section-head {
  margin-bottom: 16px;
}

.scene-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scene-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
}

.scene-meta,
.scene-criteria,
.scene-entry,
.scene-note {
  font-size: 14px;
  color: #3a3a35;
}

.meta-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 2px;
}

.scene-note {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  color: var(--gray);
}

.scene-section .scene-card .media-frame {
  margin: 0 0 4px;
}

.scene-section .scene-card .media-frame img {
  aspect-ratio: 3 / 2;
}

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

.steps-section .step-item {
  border-top: 6px solid var(--green);
}

.steps-section .step-num {
  font-size: 22px;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.device-card {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 18px;
  min-width: 0;
}

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

.device-desc {
  font-size: 14px;
  color: #3a3a35;
}

.checklist {
  margin-top: 20px;
  border-top: 2px solid var(--ink);
}

.checklist-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.checklist-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
}

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

.checklist-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.checklist-method {
  font-size: 14px;
  color: #3a3a35;
}

/* ===== pages: 收录准则 ===== */
.summary-list {
  margin-top: 20px;
  border-top: 2px solid var(--ink);
}

.summary-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.summary-num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--orange);
}

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

.summary-body .summary-name {
  font-size: 17px;
  margin-bottom: 4px;
}

.summary-text {
  font-size: 14px;
  color: #3a3a35;
}

.clause-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.clause-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-left: 6px solid var(--green);
  border-radius: 4px;
  padding: 20px 22px;
}

.clause-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  margin-bottom: 4px;
}

.clause-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.clause-text {
  font-size: 14px;
  color: #3a3a35;
  margin-bottom: 10px;
}

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

.check-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-right: 8px;
}

.check-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.check-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 4px;
  padding: 16px 20px;
}

.check-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.check-text {
  font-size: 14px;
  color: #3a3a35;
}

/* ===== pages: 纠错说明 ===== */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.scope-grid .scope-card {
  padding: 20px;
}

.scope-card-heading {
  font-size: 17px;
  margin-bottom: 6px;
}

.scope-card-text {
  font-size: 14px;
  color: #3a3a35;
}

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

.clue-list {
  margin-top: 8px;
  border-top: 2px solid var(--ink);
}

.clue-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.clue-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
}

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

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

.clue-text {
  font-size: 14px;
  color: #3a3a35;
}

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

.boundary-col {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 22px;
  min-width: 0;
}

.boundary-accept {
  border-top: 6px solid var(--green);
}

.boundary-decline {
  border-top: 6px solid var(--orange);
}

.boundary-title {
  font-size: 18px;
  margin-bottom: 12px;
}

.boundary-list {
  display: grid;
  gap: 10px;
}

.boundary-list li {
  font-size: 14px;
  color: #3a3a35;
  padding-left: 20px;
  position: relative;
}

.boundary-accept .boundary-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

.boundary-decline .boundary-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: var(--orange);
  font-weight: 700;
}

.related-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
}

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

/* ===== pages: 404 ===== */
.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad) 72px;
}

.error-hero {
  padding: 72px 0 56px;
  border-bottom: 3px solid var(--ink);
}

.error-hero-inner {
  max-width: 640px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--orange);
  margin-bottom: 12px;
}

.error-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #3a3a35;
  margin-bottom: 28px;
  max-width: 560px;
}

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

.error-btn-primary,
.error-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 15px;
  border: 2px solid var(--ink);
}

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

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

.error-btn-secondary {
  background: transparent;
  color: var(--ink);
}

.error-btn-secondary:hover {
  background: var(--ink);
  color: var(--paper);
}

.error-next {
  padding: 48px 0;
}

.error-next-title {
  font-size: 24px;
  margin-bottom: 8px;
}

.error-next-desc {
  color: var(--gray);
  margin-bottom: 24px;
  max-width: 640px;
}

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

.error-next-item {
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 18px 20px;
  min-width: 0;
}

.error-next-item-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.error-next-item-desc {
  font-size: 14px;
  color: #3a3a35;
}

.error-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--gray);
  padding: 12px 18px;
  border-left: 4px solid var(--orange);
  background: #fff;
}

/* ===== footer ===== */
.site-footer {
  background: var(--ink);
  color: #d9d5ca;
  margin-top: 72px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px var(--pad) 32px;
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: 40px;
}

.footer-brand-name {
  font-weight: 800;
  font-size: 19px;
  color: #fff;
  margin-bottom: 10px;
}

.footer-brand-desc {
  font-size: 14px;
  color: #a8a49a;
  max-width: 320px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer-group-toggle {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid #3a3a35;
  text-align: left;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.footer-links {
  display: grid;
  gap: 2px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: #d9d5ca;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px var(--pad) 28px;
  border-top: 1px solid #3a3a35;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-tagline {
  font-size: 13px;
  color: #a8a49a;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: #d9d5ca;
  font-weight: 600;
}

.back-to-top:hover {
  color: #fff;
}

/* ===== responsive ===== */
@media (max-width: 960px) {
  .header-inner {
    gap: 12px;
  }

  .site-nav.main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .quick-jump-btn {
    margin-left: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-figure {
    max-width: 640px;
  }

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

  .featured-grid,
  .scene-grid,
  .related-grid,
  .summary-grid,
  .source-grid,
  .tip-columns,
  .scope-grid,
  .link-card-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .route-block-wide {
    grid-column: 1 / -1;
  }

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

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

  .channel-row {
    grid-template-columns: 48px minmax(0, 1fr);
    row-gap: 10px;
  }

  .channel-row .channel-usage {
    grid-column: 2;
    justify-self: start;
  }

  .channel-row .channel-links {
    grid-column: 2;
    justify-content: flex-start;
  }

  .channel-item {
    grid-template-columns: 48px minmax(0, 1fr);
    row-gap: 10px;
  }

  .channel-item .channel-links {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
  }

  .page-title-block,
  .page-title-area,
  .page-hero-inner,
  .page-head {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section-guide .guide-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .route-entry {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .correction-band {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .update-item {
    grid-template-columns: 100px 1fr;
    row-gap: 4px;
  }

  .update-item .update-link {
    grid-column: 1 / -1;
  }

  .type-index-row {
    grid-template-columns: 64px minmax(0, 1fr);
    row-gap: 6px;
  }

  .type-index-row .type-index-channel,
  .type-index-row .type-index-topic,
  .type-index-row .type-index-status {
    grid-column: 2;
    justify-self: start;
  }
}

@media (max-width: 720px) {
  :root {
    --pad: 18px;
  }

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

  .hero-title {
    font-size: clamp(2rem, 8vw, 2.6rem);
  }

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

  .usage-filter-list,
  .featured-grid,
  .scene-grid,
  .related-grid,
  .summary-grid,
  .source-grid,
  .tip-columns,
  .scope-grid,
  .link-card-row,
  .route-grid,
  .step-list,
  .step-strip,
  .step-row,
  .steps-section .step-list,
  .device-grid,
  .boundary-columns,
  .error-next-list {
    grid-template-columns: 1fr;
  }

  .toc-list {
    grid-template-columns: 1fr;
  }

  .footer-groups {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-group-toggle {
    margin-bottom: 0;
  }

  .footer-group .footer-links {
    padding: 6px 0 10px;
  }

  .update-item {
    grid-template-columns: 1fr;
  }

  .update-date,
  .update-type {
    justify-self: start;
  }

  .rules-item,
  .summary-item,
  .checklist-item,
  .clue-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 14px;
  }

  .channel-row,
  .channel-item {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .type-index-row {
    grid-template-columns: 1fr;
  }

  .type-index-row .type-index-channel,
  .type-index-row .type-index-topic,
  .type-index-row .type-index-status {
    grid-column: 1;
  }

  .page-header {
    margin-bottom: 28px;
  }

  .section {
    padding: 36px 0;
  }

  .section-block {
    padding: 36px 0;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .header-inner {
    height: 64px;
  }

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

  .quick-jump-btn {
    padding: 0 12px;
    font-size: 13px;
  }

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

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

  .data-table {
    min-width: 560px;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}