:root {
  --paper: #F6F3EC;
  --ink: #171A1F;
  --teal: #174A4A;
  --teal-soft: #2A6666;
  --orange: #D96B2B;
  --code-bg: #1E2428;
  --line: #D8D1C4;
  --muted: #6E6A62;
  --paper-raised: #FCFAF5;
  --shell-width: 1160px;
  --prose-width: 760px;
  --radius: 6px;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.32;
  color: var(--ink);
}

p {
  margin: 0;
}

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

dl,
dd {
  margin: 0;
}

dt,
dd {
  margin: 0;
}

figure {
  margin: 0;
}

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

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

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

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

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

summary {
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

button {
  font-family: inherit;
  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 — 全站骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
}

.page-shell {
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(246, 243, 236, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  min-height: 68px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--teal);
  border-radius: var(--radius);
  background-color: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.brand-slogan {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background-color: var(--ink);
}

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 11px;
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--teal);
  background-color: rgba(23, 74, 74, 0.08);
}

.nav-link.is-current {
  color: var(--teal);
  font-weight: 700;
  background-color: rgba(23, 74, 74, 0.1);
}

.site-main {
  flex: 1 0 auto;
  padding-bottom: 72px;
}

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

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  padding-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.02em;
}

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

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

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

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

.page-header {
  padding-top: 8px;
  padding-bottom: 20px;
}

.page-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.28;
  color: var(--ink);
}

.site-footer {
  flex: 0 0 auto;
  border-top: 1px solid var(--line);
  background-color: var(--paper-raised);
}

.footer-inner {
  padding-top: 36px;
  padding-bottom: 28px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

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

.footer-summary {
  margin-bottom: 10px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-summary::after {
  content: "";
}

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

.footer-list a {
  display: inline-block;
  padding: 2px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.footer-list a:hover {
  color: var(--teal);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  padding-top: 20px;
}

.footer-brand {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
}

.footer-slogan {
  color: var(--teal);
  font-size: 13px;
}

.footer-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   components — 通用元素
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--teal);
  border-color: var(--teal);
  color: var(--paper);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--teal-soft);
  border-color: var(--teal-soft);
  color: var(--paper);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--orange);
  color: var(--orange);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: var(--orange);
  color: var(--paper);
}

.text-link,
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.text-link::after,
.inline-link::after {
  content: "\2192";
  font-size: 13px;
  line-height: 1;
}

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

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background-color: var(--paper-raised);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.tag-morning {
  border-color: rgba(217, 107, 43, 0.4);
  color: var(--orange);
  background-color: rgba(217, 107, 43, 0.08);
}

.tag-afternoon {
  border-color: rgba(23, 74, 74, 0.35);
  color: var(--teal);
  background-color: rgba(23, 74, 74, 0.07);
}

.tag-evening {
  border-color: rgba(30, 36, 40, 0.35);
  color: var(--code-bg);
  background-color: rgba(30, 36, 40, 0.06);
}

.tag-day {
  border-color: rgba(110, 106, 98, 0.4);
  color: var(--muted);
  background-color: rgba(110, 106, 98, 0.06);
}

.tag-type {
  border-color: rgba(23, 74, 74, 0.3);
  color: var(--teal);
  background-color: rgba(23, 74, 74, 0.06);
}

.tag-topic {
  border-color: rgba(217, 107, 43, 0.35);
  color: var(--orange);
  background-color: rgba(217, 107, 43, 0.07);
}

.section-head {
  margin-bottom: 18px;
}

.section-title {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.section-desc {
  max-width: var(--prose-width);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.section-note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.section-foot {
  margin-top: 14px;
}

.section-intro {
  max-width: var(--prose-width);
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages — 首页
   -------------------------------------------------------------------------- */

.home-main {
  padding-bottom: 72px;
}

.hero {
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: start;
  padding-top: 44px;
  padding-bottom: 44px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 560px;
}

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

.hero-eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  background-color: var(--orange);
}

.hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.hero-lead {
  max-width: 520px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.hero-caption {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.badge-channel {
  border-color: rgba(23, 74, 74, 0.35);
  color: var(--teal);
  background-color: rgba(23, 74, 74, 0.07);
}

.badge-schedule {
  border-color: rgba(217, 107, 43, 0.4);
  color: var(--orange);
  background-color: rgba(217, 107, 43, 0.08);
}

.badge-guide {
  border-color: rgba(30, 36, 40, 0.35);
  color: var(--code-bg);
  background-color: rgba(30, 36, 40, 0.06);
}

.column-status-strip {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
}

.strip-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

.status-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  overflow: hidden;
}

.status-item {
  min-width: 0;
  border-right: 1px solid var(--line);
}

.status-item:last-child {
  border-right: 0;
}

.status-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 14px 16px;
  color: var(--ink);
}

.status-link:hover {
  background-color: rgba(23, 74, 74, 0.06);
  color: var(--teal);
}

.status-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
}

.status-desc {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.schedule-preview {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--line);
}

.schedule-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.schedule-table {
  min-width: 640px;
  font-size: 14px;
}

.schedule-table thead th {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background-color: rgba(30, 36, 40, 0.04);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: left;
  white-space: nowrap;
}

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

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

.schedule-table tbody th {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.schedule-table tbody td {
  color: var(--muted);
  line-height: 1.6;
}

.schedule-table .row-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.schedule-table .row-link:hover {
  color: var(--orange);
}

.channel-preview {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--line);
}

.channel-figure {
  display: grid;
  grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-bottom: 22px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.channel-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.channel-figure figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

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

.channel-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.channel-card:hover {
  border-color: var(--teal);
  background-color: #FBF9F3;
}

.channel-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.channel-direction {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.7;
}

.channel-fit {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  margin-top: auto;
  padding-top: 4px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
}

.channel-link::after {
  content: "\2192";
  font-size: 12px;
  line-height: 1;
}

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

.topic-preview {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--line);
}

.topic-figure {
  display: grid;
  grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-bottom: 22px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.topic-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.topic-figure figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.topic-strip-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topic-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.topic-strip:hover {
  border-color: var(--teal);
  border-left-color: var(--orange);
  background-color: #FBF9F3;
}

.topic-strip-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.topic-name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.topic-desc {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.7;
}

.topic-meta {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

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

.watch-path {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--line);
}

.path-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  counter-reset: path;
}

.path-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.path-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 4px;
  background-color: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

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

.path-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.path-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.feedback-strip {
  padding: 32px 0 0;
}

.feedback-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.feedback-text {
  flex: 1 1 320px;
  min-width: 0;
}

.feedback-title {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.feedback-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages — 频道目录
   -------------------------------------------------------------------------- */

.page-channels .page-title {
  margin-bottom: 0;
}

.page-channels .page-title .page-kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-channels .page-lead {
  max-width: var(--prose-width);
  margin-top: 10px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.meta-label {
  color: var(--teal);
  font-weight: 700;
}

.channel-overview {
  margin-bottom: 32px;
}

.channel-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

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

.channel-anchor a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  color: var(--teal);
  font-size: 14px;
  font-weight: 600;
}

.channel-anchor a:hover {
  border-color: var(--teal);
  color: var(--orange);
}

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

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

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

.channel-section {
  margin-bottom: 32px;
}

.channel-entry {
  padding: 22px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.channel-entry:last-child {
  margin-bottom: 0;
}

.channel-entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.channel-entry-head .channel-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.channel-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border: 1px solid rgba(23, 74, 74, 0.35);
  border-radius: 4px;
  background-color: rgba(23, 74, 74, 0.06);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.channel-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 16px;
  margin-bottom: 14px;
}

.channel-fields dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding-top: 3px;
}

.channel-fields dd {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.7;
  min-width: 0;
}

.channel-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.channel-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
}

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

.channel-order {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.channel-order .channel-figure {
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  margin: 16px 0 18px;
  padding: 0;
  border: 0;
  background-color: transparent;
}

.channel-order .figure-caption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.order-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: order;
}

.order-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

.order-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background-color: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.order-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.order-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.order-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.order-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
}

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

.aside-block {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.aside-title {
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal);
  text-transform: uppercase;
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-list li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.aside-list a {
  color: var(--teal);
  font-weight: 600;
}

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

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.aside-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--teal);
  font-size: 14px;
  font-weight: 600;
}

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

/* --------------------------------------------------------------------------
   pages — 节目预告
   -------------------------------------------------------------------------- */

.page-schedule .page-title .page-kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-summary,
.page-lead {
  max-width: var(--prose-width);
  margin-top: 10px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

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

.section:first-of-type {
  border-top: 0;
  padding-top: 12px;
}

.section-schedule .section-head h2,
.section-tags .section-head h2,
.section-change .section-head h2,
.section-reading .section-head h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 6px;
}

.schedule-figure {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-bottom: 20px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.schedule-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.figure-caption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.table-caption {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background-color: rgba(30, 36, 40, 0.04);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-align: left;
}

.tag-definition-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tag-definition {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.tag-definition h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.tag-definition p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.change-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.change-step h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.change-step p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.reading-body p {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
}

.reading-body .inline-link {
  align-self: flex-start;
}

/* --------------------------------------------------------------------------
   pages — 往期内容
   -------------------------------------------------------------------------- */

.page-archive .page-title .page-kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-archive .page-title .page-lead {
  max-width: var(--prose-width);
  margin-top: 10px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.page-archive .page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.archive-aside {
  min-width: 0;
}

.index-group {
  margin-bottom: 16px;
}

.index-group:last-child {
  margin-bottom: 0;
}

.index-group-title {
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.index-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.index-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 4px 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
  border-bottom: 1px dashed transparent;
}

.index-list a:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

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

.archive-intro {
  margin-bottom: 22px;
}

.archive-group {
  padding: 22px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.archive-group:last-child {
  margin-bottom: 0;
}

.group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.group-head h2,
.group-head h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.group-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

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

.archive-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

.archive-item-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.archive-item-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.archive-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.archive-order {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.archive-order p {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
}

.archive-order p + p {
  margin-top: 10px;
}

.order-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.order-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
}

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

.archive-figure {
  margin-bottom: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.archive-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.aside-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 8px;
}

/* --------------------------------------------------------------------------
   pages — 专题片单
   -------------------------------------------------------------------------- */

.page-topics .page-title .page-tag {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-topics .page-lead {
  max-width: var(--prose-width);
  margin-top: 10px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.topic-index {
  margin-bottom: 32px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.topic-index h2 {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.topic-index-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.topic-index-item {
  min-width: 0;
}

.topic-index-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background-color: var(--paper);
  color: var(--ink);
}

.topic-index-link:hover {
  border-color: var(--teal);
  border-left-color: var(--orange);
  color: var(--teal);
}

.topic-index-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
}

.topic-index-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.page-topics .topic-strip {
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  align-items: stretch;
  gap: 22px;
  margin-bottom: 20px;
  padding: 20px;
  border-left: 1px solid var(--line);
  border-top: 3px solid var(--orange);
}

.page-topics .topic-strip:hover {
  border-left-color: var(--line);
  border-top-color: var(--teal);
}

.page-topics .topic-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  border: 0;
  background-color: transparent;
  margin: 0;
}

.page-topics .topic-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.topic-figcaption {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.topic-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.topic-kicker {
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-body h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.topic-channels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
  border-bottom: 1px dashed var(--line);
}

.topic-channels-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.topic-channel-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topic-channel-item {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border: 1px solid rgba(23, 74, 74, 0.3);
  border-radius: 4px;
  background-color: rgba(23, 74, 74, 0.06);
  color: var(--teal);
  font-size: 12px;
  line-height: 1.6;
}

.topic-playlist {
  display: flex;
  flex-direction: column;
  gap: 6px;
  counter-reset: playlist;
}

.playlist-item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  counter-increment: playlist;
}

.playlist-item::before {
  content: counter(playlist, decimal-leading-zero);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.playlist-title {
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

.playlist-note {
  grid-column: 2;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.topic-order-link {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 6px;
  min-height: 36px;
  margin-top: 4px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.topic-order-link::after {
  content: "\2192";
  font-size: 12px;
  line-height: 1;
}

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

.watch-order {
  margin-top: 32px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.watch-order h2 {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.watch-order-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.order-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 4px;
  background-color: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.step-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.step-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.step-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages — 观看说明
   -------------------------------------------------------------------------- */

.page-guide .page-title {
  padding-bottom: 0;
}

.page-guide .page-title-inner {
  padding-top: 0;
  padding-bottom: 20px;
}

.page-guide .page-kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.guide-media {
  padding: 0 0 24px;
}

.media-figure {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

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

.media-caption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.guide-checklist,
.guide-env,
.guide-faq,
.guide-related {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.guide-checklist .section-head h2,
.guide-env .section-head h2,
.guide-faq .section-head h2,
.guide-related .section-head h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 6px;
}

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

.checklist-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.check-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.check-title {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.check-text {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.env-col {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.col-title {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.env-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.env-item {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.env-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--orange);
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "\2212";
}

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

.faq-answer {
  padding: 14px 18px 18px;
}

.faq-answer p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

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

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

.related-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  color: var(--ink);
}

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

.related-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
}

.related-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   pages — 内容反馈
   -------------------------------------------------------------------------- */

.page-feedback .page-title .page-tag {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-feedback .page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.feedback-scope,
.feedback-materials,
.feedback-process,
.feedback-boundary,
.feedback-faq {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.feedback-scope h2,
.feedback-materials h2,
.feedback-process h2,
.feedback-boundary h2,
.feedback-faq h2 {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.scope-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.scope-item h3 {
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.scope-item p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.scope-hint {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.materials-figure {
  margin: 18px 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.materials-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--line);
}

.materials-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.materials-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.material-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.material-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background-color: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.material-item h3 {
  grid-column: 2;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.material-item p {
  grid-column: 2;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.process-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background-color: var(--orange);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.process-step h3 {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.process-step p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.boundary-block {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
}

.boundary-block h3 {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.boundary-block p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.boundary-block p + p {
  margin-top: 8px;
}

.feedback-faq .faq-list {
  margin-top: 18px;
}

/* --------------------------------------------------------------------------
   pages — 404
   -------------------------------------------------------------------------- */

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

.error-shell {
  max-width: var(--prose-width);
  padding-top: 56px;
  padding-bottom: 56px;
}

.error-code-label {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  border: 1px solid rgba(217, 107, 43, 0.4);
  border-radius: 4px;
  background-color: rgba(217, 107, 43, 0.08);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.error-title {
  margin-bottom: 12px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.error-lead {
  max-width: 560px;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius);
  background-color: var(--teal);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
}

.error-home-link:hover {
  background-color: var(--teal-soft);
  color: var(--paper);
}

.error-entry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
}

.error-entry a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-raised);
  color: var(--teal);
  font-size: 14px;
  font-weight: 600;
}

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

.error-note {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   responsive — 960px
   -------------------------------------------------------------------------- */

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

  .header-inner {
    gap: 10px 20px;
    min-height: 60px;
  }

  .site-nav {
    margin-left: 0;
    width: 100%;
    order: 3;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    padding-top: 8px;
    margin-top: 4px;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    display: flex;
    width: 100%;
    min-height: 44px;
    padding: 8px 10px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 28px;
    padding-bottom: 32px;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-media {
    max-width: 620px;
  }

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

  .status-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .status-item:nth-child(2n) {
    border-right: 0;
  }

  .status-item:nth-child(odd) {
    border-right: 1px solid var(--line);
  }

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

  .status-item:nth-last-child(2):nth-child(odd) {
    border-bottom: 0;
  }

  .channel-figure,
  .topic-figure,
  .schedule-figure,
  .media-figure {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  }

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

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

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

  .page-topics .topic-strip {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: 16px;
  }

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

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

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

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

  .footer-groups {
    gap: 20px 28px;
  }
}

/* --------------------------------------------------------------------------
   responsive — 640px
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .page-shell {
    padding: 0 16px;
  }

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

  .brand-slogan {
    display: none;
  }

  .breadcrumb {
    padding-top: 14px;
    font-size: 12px;
  }

  .page-title {
    font-size: clamp(26px, 7vw, 34px);
  }

  .hero-title {
    font-size: clamp(30px, 8vw, 40px);
  }

  .hero-lead {
    font-size: 15px;
  }

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

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

  .hero-media {
    max-width: none;
  }

  .strip-title {
    margin-bottom: 10px;
  }

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

  .status-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .status-item:nth-child(odd) {
    border-right: 0;
  }

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

  .status-link {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    padding: 12px 14px;
  }

  .status-name {
    flex: 0 0 auto;
    font-size: 14px;
  }

  .status-desc {
    flex: 1 1 auto;
    font-size: 12px;
  }

  .schedule-preview,
  .channel-preview,
  .topic-preview,
  .watch-path {
    padding: 28px 0 32px;
  }

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

  .channel-figure,
  .topic-figure,
  .schedule-figure,
  .media-figure {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

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

  .channel-card {
    padding: 16px;
  }

  .topic-strip {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 16px;
  }

  .topic-link {
    justify-self: stretch;
    width: 100%;
  }

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

  .feedback-inner {
    padding: 18px;
  }

  .feedback-inner .btn {
    width: 100%;
  }

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

  .layout-aside {
    order: 2;
  }

  .channel-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .channel-fields dt {
    padding-top: 8px;
    color: var(--teal);
  }

  .channel-fields dt:first-child {
    padding-top: 0;
  }

  .channel-order {
    padding: 16px;
  }

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

  .order-item {
    grid-template-columns: 28px minmax(0, 1fr);
    padding: 12px;
  }

  .order-num {
    width: 26px;
    height: 26px;
  }

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

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

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

  .page-topics .topic-strip {
    grid-template-columns: minmax(0, 1fr);
    padding: 16px;
  }

  .page-topics .topic-figure {
    max-width: 100%;
  }

  .watch-order {
    padding: 18px;
  }

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

  .guide-checklist,
  .guide-env,
  .guide-faq,
  .guide-related {
    padding: 24px 0;
  }

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

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

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

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

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

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

  .faq-question {
    padding: 12px 14px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 12px 14px 16px;
  }

  .footer-inner {
    padding-top: 24px;
    padding-bottom: 20px;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding-bottom: 16px;
  }

  .footer-group {
    padding: 10px 0;
    border-bottom: 1px dashed var(--line);
  }

  .footer-group:last-child {
    border-bottom: 0;
  }

  .footer-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
    margin-bottom: 0;
    padding: 0;
  }

  .footer-summary::after {
    content: "+";
    color: var(--teal);
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
  }

  .footer-group[open] .footer-summary::after {
    content: "\2212";
  }

  .footer-list {
    padding: 6px 0 8px;
  }

  .footer-list a {
    display: flex;
    align-items: center;
    min-height: 40px;
    font-size: 14px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-top: 16px;
  }

  .error-shell {
    padding-top: 36px;
    padding-bottom: 36px;
  }

  .error-entry-list {
    gap: 6px;
  }

  .error-entry {
    flex: 1 1 100%;
  }

  .error-entry a {
    width: 100%;
    justify-content: center;
  }
}

/* --------------------------------------------------------------------------
   responsive — 桌面端页脚 details 展开
   -------------------------------------------------------------------------- */

@media (min-width: 641px) {
  .footer-group {
    display: block;
  }

  .footer-group > .footer-list {
    display: flex;
  }

  .footer-summary {
    pointer-events: none;
  }
}

/* --------------------------------------------------------------------------
   motion — 尊重减少动效偏好
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}