/* ==========================================================================
   被窝影院在线观看 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --canvas: #f4f3f0;
  --surface: #ffffff;
  --text: #2b2b2b;
  --text-muted: #6b6b6b;
  --line: #dcd9d3;
  --accent: #8a5a3b;
  --accent-soft: #f0e8e1;
  --container: 1120px;
  --content: 720px;
  --radius: 6px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

h1,
h2,
h3 {
  margin: 0 0 0.6em;
  color: var(--text);
  font-weight: 600;
  line-height: 1.35;
}

h1 {
  font-size: 30px;
  line-height: 1.3;
}

h2 {
  font-size: 22px;
  line-height: 1.4;
}

h3 {
  font-size: 18px;
  line-height: 1.5;
}

p {
  margin: 0 0 1em;
}

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

ul,
ol {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
}

dl,
dd,
dt,
figure,
figcaption {
  margin: 0;
}

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

button {
  font: inherit;
  color: inherit;
}

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

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

.site-body {
  min-height: 100vh;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 68px;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 0;
}

.nav-list-left {
  justify-content: flex-start;
}

.nav-list-right {
  justify-content: flex-end;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 0;
  color: var(--text);
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  min-height: 44px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 3px;
}

.nav-toggle-text {
  font-size: 14px;
  color: var(--text-muted);
}

.brand {
  flex: 0 0 auto;
  padding: 0 12px;
  color: var(--text);
  font-size: 19px;
  font-weight: 600;
  white-space: nowrap;
}

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

.site-main {
  display: block;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 150ms ease;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
  text-decoration: none;
}

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

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

.page-header {
  max-width: var(--content);
  padding-bottom: 26px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  margin: 0 0 0.5em;
  font-size: 30px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

.page-description {
  margin: 0 0 0.8em;
  font-size: 14px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.page-intro {
  margin: 0;
  font-size: 16px;
  color: var(--text);
}

.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 36px;
}

.footer-brand {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.footer-desc {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-nav {
  margin-bottom: 16px;
}

.footer-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
}

.footer-item {
  list-style: none;
}

.footer-link {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 150ms ease;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent);
  text-decoration: none;
}

.footer-copy {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

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

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

.section:last-of-type {
  border-bottom: none;
}

.section-head {
  margin-bottom: 22px;
}

.section-title {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
}

.section-desc,
.section-note,
.section-intro,
.section-lead {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
  max-width: var(--content);
}

.section-body {
  max-width: var(--content);
}

.lead {
  font-size: 16px;
  color: var(--text);
}

.section-foot {
  margin: 20px 0 0;
}

.text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease;
}

.text-link:hover,
.text-link:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.inline-link {
  color: var(--accent);
  border-bottom: 1px solid var(--line);
}

.inline-link:hover,
.inline-link:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  border: 1px solid transparent;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #74492e;
  border-color: #74492e;
  text-decoration: none;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.pager-nav,
.record-pager,
.topic-pager {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
}

.pager-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  transition: border-color 150ms ease, color 150ms ease;
}

.pager-link:hover,
.pager-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.pager-prev::before {
  content: "←";
  margin-right: 8px;
  color: var(--text-muted);
}

.pager-next::after {
  content: "→";
  margin-left: 8px;
  color: var(--text-muted);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 14px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.related-links-item {
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease;
}

.related-links-item:hover,
.related-links-item:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   4. pages · 首页
   -------------------------------------------------------------------------- */

.topbar {
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line);
}

.topbar-text {
  max-width: var(--container);
  margin: 0 auto;
  padding: 10px 24px;
  font-size: 13px;
  color: var(--text-muted);
}

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

.hero {
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 40px;
  align-items: center;
}

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

.hero-eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
}

.hero-title {
  margin: 0 0 14px;
  font-size: 30px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

.hero-lead {
  margin: 0 0 20px;
  max-width: 520px;
  font-size: 16px;
  color: var(--text);
}

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

.hero-media {
  margin: 0;
}

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

.media-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-trails {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
}

.trail-item {
  list-style: none;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
}

.trail-code {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

/* 频道分类总览（首页表格） */
.channel-table {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.channel-table .channel-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1.1fr) minmax(0, 1.4fr) minmax(0, 1.4fr);
  gap: 16px;
  align-items: start;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
}

.channel-table .channel-row:first-child {
  border-top: none;
}

.channel-table .channel-row-head {
  background: var(--accent-soft);
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.channel-cell {
  min-width: 0;
  font-size: 15px;
  word-break: break-word;
}

.channel-table .channel-row-head .channel-cell {
  font-size: 13px;
}

.channel-table .channel-row:not(.channel-row-head) .cell-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.channel-table .channel-row:not(.channel-row-head) .cell-name {
  font-weight: 600;
}

/* 专题片单入口（首页） */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.topic-grid .topic-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.topic-media {
  margin: 0;
}

.topic-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
}

.topic-grid .topic-name {
  margin: 16px 18px 8px;
  font-size: 18px;
}

.topic-grid .topic-desc {
  margin: 0 18px 12px;
  font-size: 15px;
  color: var(--text);
}

.topic-grid .topic-meta {
  margin: auto 18px 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.meta-label {
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-right: 8px;
}

.meta-value {
  color: var(--text);
}

/* 整理记录时间线速览（首页） */
.record-timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.record-timeline .record-group {
  min-width: 0;
}

.record-month {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
}

.record-timeline .record-list {
  margin: 0;
  padding: 0;
}

.record-timeline .record-item {
  list-style: none;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}

.record-timeline .record-item:last-child {
  border-bottom: none;
}

.record-timeline .record-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
}

.record-timeline .record-type {
  display: inline-block;
  margin: 4px 0;
  padding: 1px 8px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
}

.record-timeline .record-scope {
  display: block;
  color: var(--text);
}

/* 观看指引与入口核验摘要（首页） */
.guide-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.guide-col {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.guide-subtitle {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.prepare-list {
  margin: 0;
  padding: 0;
}

.prepare-item {
  list-style: none;
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 15px;
}

.prepare-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.guide-col-verify .verify-steps {
  margin: 0;
  padding: 0;
}

.guide-col-verify .verify-step {
  list-style: none;
  position: relative;
  padding: 6px 0 6px 34px;
  font-size: 15px;
}

.guide-col-verify .step-no {
  position: absolute;
  left: 0;
  top: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

/* 站内页面索引（首页） */
.index-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

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

.index-name {
  margin: 0 0 8px;
  font-size: 18px;
}

.index-desc {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--text-muted);
}

.index-link {
  display: inline-block;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease;
}

.index-link:hover,
.index-link:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   4. pages · 频道分类
   -------------------------------------------------------------------------- */

.page-channels .scope-list {
  margin: 0;
  padding: 0;
}

.scope-item {
  list-style: none;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

.scope-item:first-child {
  border-top: none;
}

.scope-tag {
  display: inline-block;
  margin-right: 10px;
  padding: 1px 8px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-family: var(--font-mono);
}

.channel-figure {
  margin: 0 0 26px;
}

.channel-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.figure-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.channel-list {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.channel-list .channel-row {
  list-style: none;
  border-top: 1px solid var(--line);
}

.channel-list .channel-row:first-child {
  border-top: none;
}

.channel-entry {
  padding: 18px 22px;
}

.channel-code {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.channel-name {
  margin: 0 0 10px;
  font-size: 18px;
}

.channel-field {
  margin: 0 0 4px;
  font-size: 15px;
  color: var(--text);
}

.field-label {
  display: inline-block;
  min-width: 96px;
  margin-right: 8px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.field-list {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.field-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
}

.field-row:first-child {
  border-top: none;
}

.field-term {
  font-weight: 600;
  font-size: 15px;
}

.field-desc {
  font-size: 15px;
  color: var(--text);
}

.pager-note {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   4. pages · 专题片单
   -------------------------------------------------------------------------- */

.topics-criteria .criteria-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin: 20px 0 0;
  padding: 0;
}

.criteria-item {
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.criteria-name {
  margin: 0 0 8px;
  font-size: 18px;
}

.criteria-desc {
  margin: 0;
  font-size: 15px;
  color: var(--text);
}

.topics-list-section {
  margin-top: 40px;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

.topics-grid .topic-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.topic-figure {
  margin: 0;
}

.topic-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
}

.topic-body {
  padding: 16px 18px 18px;
}

.topic-code {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.topic-body .topic-name {
  margin: 0 0 8px;
  font-size: 18px;
}

.topic-link {
  color: var(--text);
  transition: color 150ms ease;
}

.topic-link:hover,
.topic-link:focus-visible {
  color: var(--accent);
  text-decoration: none;
}

.topic-body .topic-desc {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--text);
}

.topic-body .topic-meta {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 4px 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.topic-meta-key {
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.topic-meta-value {
  color: var(--text);
}

.topics-series {
  margin-top: 40px;
}

.series-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  margin-top: 22px;
}

.series-index-col,
.series-scope-col {
  min-width: 0;
}

.series-subtitle {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.series-list {
  margin: 0;
  padding: 0;
}

.series-item {
  list-style: none;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}

.series-item:last-child {
  border-bottom: none;
}

.series-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.series-name {
  color: var(--text);
}

.series-members {
  font-size: 13px;
  color: var(--text-muted);
}

.series-text {
  margin: 0 0 1em;
  font-size: 15px;
}

/* --------------------------------------------------------------------------
   4. pages · 观看指引
   -------------------------------------------------------------------------- */

.guide-prep .section-lead,
.guide-verify .section-lead,
.guide-faq .section-lead,
.records-legend .section-lead,
.records-timeline .section-lead,
.records-archive .section-lead {
  margin-bottom: 20px;
}

.prep-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.prep-column {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.prep-column-title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.prep-list {
  margin: 0;
  padding: 0;
}

.prep-item {
  list-style: none;
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 15px;
}

.prep-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.guide-figure {
  margin: 26px 0 0;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.guide-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.guide-verify {
  margin-top: 40px;
}

.guide-verify .verify-steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
}

.guide-verify .verify-step {
  list-style: none;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 20px 60px;
}

.guide-verify .step-index {
  position: absolute;
  left: 20px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.guide-verify .step-title {
  margin: 0 0 6px;
  font-size: 18px;
}

.guide-verify .step-desc {
  margin: 0 0 6px;
  font-size: 15px;
}

.guide-verify .step-check {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.guide-faq {
  margin-top: 40px;
}

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

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 20px;
}

.faq-question {
  cursor: pointer;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 600;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--accent);
}

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

.faq-answer {
  padding: 0 0 16px;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

.faq-answer p {
  margin: 12px 0 0;
}

.guide-feedback {
  margin-top: 40px;
}

.feedback-links {
  margin-top: 18px;
}

.feedback-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 0;
  padding: 0;
}

.feedback-item {
  list-style: none;
}

.feedback-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  transition: border-color 150ms ease, color 150ms ease;
}

.feedback-link:hover,
.feedback-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   4. pages · 整理记录
   -------------------------------------------------------------------------- */

.legend-list {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.legend-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
}

.legend-item:first-child {
  border-top: none;
}

.legend-term {
  font-weight: 600;
  font-size: 15px;
}

.legend-desc {
  font-size: 15px;
  color: var(--text);
}

.records-media {
  margin: 32px 0 0;
}

.records-media img {
  width: 100%;
  aspect-ratio: 21 / 9;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.records-timeline {
  margin-top: 40px;
}

.timeline-year {
  margin-top: 28px;
}

.timeline-year:first-of-type {
  margin-top: 0;
}

.year-title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent);
}

.records-timeline .record-list {
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--line);
}

.records-timeline .record-item {
  list-style: none;
  position: relative;
  padding: 0 0 22px 24px;
  border-bottom: none;
}

.records-timeline .record-item:last-child {
  padding-bottom: 0;
}

.records-timeline .record-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 50%;
}

.records-timeline .record-date {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
}

.records-timeline .record-type {
  display: inline-block;
  margin: 0 0 6px;
  padding: 1px 8px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
}

.records-timeline .record-text {
  margin: 0 0 4px;
  font-size: 15px;
}

.records-timeline .record-scope {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.records-archive {
  margin-top: 40px;
}

.archive-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0 0 6px;
  padding: 0;
}

.archive-item {
  list-style: none;
}

.archive-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  transition: border-color 150ms ease, color 150ms ease;
}

.archive-link:hover,
.archive-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   4. pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  padding-top: 60px;
  padding-bottom: 80px;
}

.error-panel {
  max-width: var(--content);
}

.error-code {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.error-title {
  margin: 0 0 14px;
  font-size: 30px;
  font-weight: 600;
  line-height: 1.3;
}

.error-desc {
  margin: 0 0 22px;
  font-size: 16px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
}

.error-link-item {
  list-style: none;
}

.error-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  transition: border-color 150ms ease, color 150ms ease;
}

.error-link:hover,
.error-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.error-note {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

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

@media (max-width: 960px) {
  .header-inner {
    padding: 0 20px;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 12px;
    padding: 10px 0;
  }

  .nav-toggle {
    display: inline-flex;
    order: 1;
  }

  .brand {
    order: 2;
    margin-left: auto;
    padding: 0;
  }

  .nav-list {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    display: none;
  }

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

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

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 10px 4px;
    border-bottom: none;
  }

  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link.is-current {
    border-bottom-color: transparent;
  }

  .site-main {
    padding: 0 20px 56px;
  }

  .inner-main {
    padding-top: 22px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .hero-media {
    order: -1;
  }

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

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

  .channel-table .channel-row-head {
    display: none;
  }

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

  .channel-table .channel-row .channel-cell {
    display: block;
  }

  .channel-table .channel-row .cell-code {
    color: var(--accent);
  }

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

  .field-label {
    min-width: 0;
    display: block;
    margin: 0 0 2px;
  }

  .series-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }
}

@media (max-width: 640px) {
  h1,
  .page-title,
  .hero-title,
  .error-title {
    font-size: 24px;
  }

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

  .topbar-text {
    padding: 10px 20px;
  }

  .hero {
    padding: 26px 0 24px;
  }

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

  .topic-grid,
  .topics-grid,
  .guide-columns,
  .prep-columns,
  .criteria-list,
  .record-timeline,
  .index-grid,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-entry {
    padding: 16px 18px;
  }

  .guide-col,
  .prep-column,
  .criteria-item,
  .index-col {
    padding: 18px;
  }

  .guide-verify .verify-step {
    padding: 18px;
  }

  .guide-verify .step-index {
    position: static;
    display: block;
    margin-bottom: 6px;
  }

  .faq-item {
    padding: 4px 16px;
  }

  .footer-list {
    gap: 6px 16px;
  }
}