:root {
  --bg-base: #0d1117;
  --bg-subtle: #161b22;
  --bg-elevated: #1c2129;
  --text-main: #e6edf3;
  --text-muted: #8b949e;
  --text-faint: #6e7681;
  --accent: #c9a96e;
  --accent-deep: #b3924f;
  --border: #30363d;
  --border-soft: #21262d;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --container: 1080px;
  --gap-xs: 8px;
  --gap-sm: 12px;
  --gap-md: 20px;
  --gap-lg: 32px;
  --gap-xl: 48px;
  --header-height: 64px;
}

/* ============================================================
   base — 全站重置与基础排版
   ============================================================ */

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

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

body {
  margin: 0;
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

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

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

/* ============================================================
   layout — 页头、导航、主容器、页脚骨架
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(13, 17, 23, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-md);
  width: 100%;
  max-width: var(--container);
  min-height: var(--header-height);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0;
}

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

.brand-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background-color: transparent;
  box-shadow: inset 0 0 0 4px var(--bg-base), inset 0 0 0 5px var(--accent);
}

.brand-name {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 1px;
}

.site-main {
  display: block;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.inner-main {
  padding-top: 24px;
  padding-bottom: 72px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

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

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

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

.page-header {
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-main);
}

.page-description {
  max-width: 820px;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 1rem;
}

.site-footer {
  margin-top: 72px;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--gap-lg);
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
}

.footer-brand-desc {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-col-title {
  margin-bottom: 12px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0;
}

.footer-links li + li {
  margin-top: 8px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--text-main);
}

.footer-col-text {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-col-link {
  margin-top: 10px;
  font-size: 0.875rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-sm);
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 28px;
  border-top: 1px solid var(--border);
}

.footer-boundary,
.footer-copy {
  color: var(--text-faint);
  font-size: 0.8125rem;
}

.footer-top {
  font-size: 0.8125rem;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-muted);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  color: var(--accent);
}

/* ============================================================
   components — 通用按钮、链接、区块标题、表格、边界声明
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--accent);
  color: #14181f;
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--accent-deep);
  border-color: var(--accent-deep);
  color: #14181f;
  text-decoration: none;
}

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

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

.link-more {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
}

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

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--border-soft);
}

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

.section-head {
  margin-bottom: 28px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.section-desc,
.section-lead,
.section-intro {
  max-width: 820px;
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.section-foot,
.section-more {
  margin-top: 24px;
  font-size: 0.9375rem;
}

.section-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.section-media,
.media-figure {
  margin: 24px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-subtle);
}

.section-media img,
.media-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.section-media figcaption,
.media-caption {
  padding: 12px 16px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  border-top: 1px solid var(--border);
}

.field-table-wrap,
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--bg-subtle);
}

.field-table {
  min-width: 640px;
  font-size: 0.9375rem;
}

.field-table-caption,
.table-caption {
  padding: 14px 16px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.field-table th,
.field-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-soft);
}

.field-table thead th {
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0;
  background-color: var(--bg-elevated);
}

.field-table tbody th {
  width: 22%;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
}

.field-table tbody tr:hover {
  background-color: var(--bg-elevated);
}

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

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

.boundary-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 50%;
}

.boundary-feedback {
  margin-top: 22px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* ============================================================
   pages — 首页
   ============================================================ */

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

.hero {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--border-soft);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--gap-xl);
  align-items: start;
}

.hero-eyebrow {
  color: var(--accent);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.hero-title {
  margin-top: 12px;
  font-size: 2.25rem;
  font-weight: 600;
}

.hero-lead {
  max-width: 560px;
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

.hero-note {
  max-width: 560px;
  margin-top: 12px;
  padding-left: 14px;
  color: var(--text-faint);
  font-size: 0.875rem;
  border-left: 2px solid var(--border);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-aside {
  display: grid;
  gap: var(--gap-md);
}

.hero-figure {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-subtle);
}

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

.hero-figure figcaption {
  padding: 10px 14px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  border-top: 1px solid var(--border);
}

.hero-channels {
  padding: 18px 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.hero-channels-title {
  font-size: 1rem;
  font-weight: 600;
}

.channel-quick-list {
  margin-top: 12px;
}

.channel-quick-list li + li {
  border-top: 1px solid var(--border-soft);
}

.channel-quick-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-main);
  font-size: 0.9375rem;
}

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

.channel-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 168px 96px;
  gap: var(--gap-md);
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--border-soft);
}

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

.channel-name {
  font-size: 1.125rem;
  font-weight: 600;
}

.channel-intro {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.channel-range {
  margin-top: 6px;
  color: var(--text-faint);
  font-size: 0.8125rem;
}

.channel-media {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--bg-subtle);
}

.channel-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.channel-action {
  text-align: right;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.collection-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.collection-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

.collection-name {
  font-size: 1.125rem;
  font-weight: 600;
}

.collection-scope {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.collection-items {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.collection-items li {
  position: relative;
  padding-left: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.collection-card .link-more {
  margin-top: auto;
}

.path-steps {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.path-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-soft);
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.path-step .step-body {
  min-width: 0;
}

.path-step .step-name {
  font-size: 1.0625rem;
  font-weight: 600;
}

.path-step .step-point {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.boundary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: start;
}

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

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

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

.boundary-item-title {
  font-size: 1rem;
  font-weight: 600;
}

.boundary-item-text {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.boundary-aside {
  padding: 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.aside-title {
  font-size: 1rem;
  font-weight: 600;
}

.aside-text {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.aside-links {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.aside-links li + li {
  margin-top: 8px;
}

.aside-links a {
  font-size: 0.875rem;
}

/* ============================================================
   pages — 题材频道内页
   ============================================================ */

.channel-overview {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-soft);
}

.channel-table {
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-subtle);
  font-size: 0.9375rem;
}

.channel-table th,
.channel-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-soft);
}

.channel-table thead th {
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  background-color: var(--bg-elevated);
}

.channel-table tbody th {
  width: 22%;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
}

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

.channel-table tbody tr:hover {
  background-color: var(--bg-elevated);
}

.channel-sections {
  padding-top: 48px;
}

.channel-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  grid-template-areas:
    "head media"
    "body media";
  gap: 20px var(--gap-lg);
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.channel-block:first-of-type {
  margin-top: 28px;
}

.channel-head {
  grid-area: head;
  min-width: 0;
}

.channel-block .channel-name {
  font-size: 1.25rem;
  font-weight: 600;
}

.channel-tagline {
  margin-top: 6px;
  color: var(--accent);
  font-size: 0.875rem;
}

.channel-block .channel-media {
  grid-area: media;
}

.channel-block .channel-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.channel-desc {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.channel-scope {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.channel-scope li {
  position: relative;
  padding-left: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.channel-link {
  margin-top: 18px;
  font-size: 0.9375rem;
}

.channel-tips {
  padding-top: 48px;
  border-top: 1px solid var(--border-soft);
}

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

.tips-col {
  padding: 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.tips-name {
  font-size: 1rem;
  font-weight: 600;
}

.tips-text {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================================
   pages — 专题片单内页
   ============================================================ */

.collection-overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--gap-lg);
  align-items: start;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-soft);
}

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

.overview-media .media-figure {
  margin-top: 0;
}

.overview-media .media-figure img {
  aspect-ratio: 4 / 3;
}

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

.overview-text p {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.collection-list {
  padding-top: 48px;
}

.collection-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 28px;
}

.collection-cards .collection-card {
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.card-media {
  border-bottom: 1px solid var(--border);
}

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

.card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  padding: 20px;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.card-scope {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.card-list {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.card-list li {
  position: relative;
  padding-left: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.card-link {
  margin-top: auto;
  padding-top: 6px;
  font-size: 0.9375rem;
}

.collection-relation {
  padding-top: 48px;
  margin-top: 48px;
  border-top: 1px solid var(--border-soft);
}

.collection-relation p {
  max-width: 820px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.boundary-notice {
  padding-top: 48px;
  margin-top: 48px;
  border-top: 1px solid var(--border-soft);
}

/* ============================================================
   pages — 条目字段说明内页
   ============================================================ */

.section-field-preview {
  padding-top: 0;
}

.section-field-preview .media-figure {
  margin-top: 24px;
}

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

.guide-item {
  padding: 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.guide-item-title {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
}

.guide-item-text {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.guide-item-sample {
  margin-top: 12px;
  padding: 10px 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background-color: var(--bg-base);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
}

/* ============================================================
   pages — 查阅路径内页
   ============================================================ */

.path-overview {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-soft);
}

.path-figure {
  margin: 24px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-subtle);
}

.path-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.path-figure-caption {
  padding: 12px 16px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  border-top: 1px solid var(--border);
}

.path-mini-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 28px;
}

.path-mini-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.path-mini-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
}

.path-mini-link {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
}

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

.path-mini-note {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.step-section {
  padding-top: 48px;
}

.step-item {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.step-item:first-of-type {
  margin-top: 28px;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.step-item .step-index {
  flex: none;
}

.step-item .step-name {
  font-size: 1.25rem;
  font-weight: 600;
}

.step-desc {
  max-width: 820px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

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

.step-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.step-col-title {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
}

.step-points {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.step-points li {
  position: relative;
  padding-left: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.step-notes {
  margin-top: 16px;
  color: var(--text-faint);
  font-size: 0.875rem;
}

.step-entry {
  margin-top: 18px;
  font-size: 0.9375rem;
}

.route-section {
  padding-top: 48px;
  margin-top: 48px;
  border-top: 1px solid var(--border-soft);
}

.route-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 28px;
}

.route-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.route-card-title {
  font-size: 1.0625rem;
  font-weight: 600;
}

.route-card-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.route-card-link {
  margin-top: auto;
  font-size: 0.9375rem;
}

.habit-section {
  padding-top: 48px;
  margin-top: 48px;
  border-top: 1px solid var(--border-soft);
}

.habit-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: start;
  margin-top: 28px;
}

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

.habit-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.habit-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--border-soft);
}

.habit-item-title {
  font-size: 1rem;
  font-weight: 600;
}

.habit-item-desc {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.habit-aside {
  padding: 20px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.habit-aside-title {
  font-size: 1rem;
  font-weight: 600;
}

.habit-aside-desc {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.habit-aside-links {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.habit-aside-links li + li {
  margin-top: 8px;
}

.habit-aside-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 0.875rem;
}

/* ============================================================
   pages — 404
   ============================================================ */

.error-main {
  padding-top: 64px;
  padding-bottom: 72px;
}

.error-panel {
  max-width: 640px;
  padding: 40px 36px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
}

.error-title {
  margin-top: 12px;
  font-size: 2rem;
  font-weight: 600;
}

.error-text {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.error-text + .error-text {
  margin-top: 8px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.error-links {
  margin-top: 48px;
}

.error-links-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.error-links-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--gap-lg);
  margin-top: 16px;
  border-top: 1px solid var(--border);
}

.error-links-list li {
  border-bottom: 1px solid var(--border-soft);
}

.error-links-list a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  font-size: 0.9375rem;
}

/* ============================================================
   responsive — 移动端与窄屏适配
   ============================================================ */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-lg);
  }

  .channel-block {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "head"
      "media"
      "body";
  }

  .channel-block .channel-media img {
    aspect-ratio: 16 / 9;
  }

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

  .overview-media .media-figure img {
    aspect-ratio: 16 / 9;
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
  }

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

  .nav-link {
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 1px solid var(--border-soft);
  }

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

  .site-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .inner-main {
    padding-top: 20px;
    padding-bottom: 56px;
  }

  .hero {
    padding: 36px 0 32px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .section {
    padding: 40px 0;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .page-header {
    margin-bottom: 24px;
  }

  .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

  .channel-media {
    max-width: 320px;
  }

  .channel-action {
    text-align: left;
  }

  .collection-grid,
  .collection-cards,
  .tips-grid,
  .guide-list,
  .path-mini-list,
  .route-grid,
  .step-item .step-body,
  .error-links-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .path-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .step-index {
    width: 36px;
    height: 36px;
  }

  .error-panel {
    padding: 28px 22px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-lg);
    padding: 36px 16px 24px;
  }

  .footer-bottom {
    padding: 18px 16px 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .collection-card {
    padding: 18px;
  }

  .collection-cards .collection-card {
    padding: 0;
  }

  .channel-block {
    padding: 26px 0;
  }

  .field-table,
  .channel-table {
    min-width: 520px;
  }
}