/* =========================================================
   极速影视 · 全站样式
   base → layout → components → pages → responsive
   ========================================================= */

/* ---------- base ---------- */
:root {
  --ink: #16232e;
  --brick: #b4442c;
  --cream: #f6f3ee;
  --paper: #ffffff;
  --line: #d8d2c8;
  --muted: #5c6670;
  --shell: 1180px;
  --read: 760px;
}

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

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

body.site-body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  font-weight: 400;
}

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

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

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

h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

.mono,
.num {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

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

.skip-link {
  position: absolute;
  top: 0;
  left: 12px;
  z-index: 60;
  transform: translateY(-120%);
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.5;
}

.skip-link:focus {
  transform: translateY(12px);
  color: #fff;
}

/* ---------- layout ---------- */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.brand-block {
  flex: 0 0 auto;
}

.brand-name {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.brand-tagline {
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
  align-items: center;
}

.nav-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  line-height: 1.5;
}

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

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

.mobile-drawer {
  display: none;
}

.drawer-list {
  display: flex;
  flex-direction: column;
}

.drawer-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.drawer-link.is-current {
  color: var(--brick);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.home-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.breadcrumb {
  padding: 16px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

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

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

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

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

.page-header {
  padding: 18px 0 0;
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--brick);
  display: inline-block;
}

/* ---------- 通用组件 ---------- */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  line-height: 1.6;
}

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

.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.section-lead,
.section-intro,
.section-desc,
.section-lede {
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: var(--read);
}

.section-head {
  margin-bottom: 16px;
}

.section-kicker {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  font-weight: 500;
}

.table-wrap {
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 14px;
  line-height: 1.65;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  background: #efeae1;
  font-weight: 700;
  color: var(--ink);
  font-size: 13px;
  white-space: nowrap;
}

.data-table tbody th {
  font-weight: 700;
  color: var(--ink);
  background: #faf8f4;
  white-space: nowrap;
}

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

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.related-band {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

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

.related-card {
  display: block;
  padding: 18px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.related-card:hover {
  border-color: var(--brick);
}

.related-card-title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.related-card-desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}

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

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.related-links-label {
  color: var(--muted);
}

.related-links-item {
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.related-links-item:hover {
  border-bottom-color: var(--brick);
}

.related-link {
  display: block;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
}

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

.related-link-title {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.related-link-desc {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

/* FAQ 折叠 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

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

.faq-question {
  list-style: none;
  cursor: pointer;
  padding: 16px 40px 16px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.6;
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--brick);
  line-height: 1;
}

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

.faq-question:hover {
  color: var(--brick);
}

.faq-answer {
  padding: 0 18px 18px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.faq-answer p + p {
  margin-top: 10px;
}

.faq-jump {
  margin-top: 12px;
}

.faq-jump a {
  font-size: 13px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
}

.faq-jump a:hover {
  border-bottom-color: var(--brick);
}

/* 建议列表（通用） */
.advice-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

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

.advice-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.advice-item p {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.advice-body {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: #cfd6dc;
  margin-top: 8px;
}

.site-footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr;
  gap: 28px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.footer-brand-desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: #a9b3bb;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.5;
}

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

.footer-list a {
  font-size: 13px;
  color: #cfd6dc;
  line-height: 1.6;
}

.footer-list a:hover {
  color: #f0b9a8;
}

.footer-scope p {
  font-size: 13px;
  line-height: 1.7;
  color: #a9b3bb;
}

.footer-scope p + p {
  margin-top: 8px;
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12px;
  color: #8f9ba4;
  border-top: 1px solid #2c3d4a;
}

.footer-bottom-brand {
  color: #fff;
  font-weight: 700;
  font-size: 13px;
}

/* =========================================================
   pages
   ========================================================= */

/* ---------- 首页 ---------- */
.info-bar {
  background: var(--ink);
  color: #cfd6dc;
}

.info-bar-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 24px;
  font-size: 12px;
  line-height: 1.6;
}

.info-bar-tagline {
  color: #fff;
  font-weight: 500;
}

.info-bar-meta {
  color: #a9b3bb;
}

.info-bar-meta .num {
  color: #f0b9a8;
}

.hero {
  padding: 36px 0 40px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: 40px;
  align-items: start;
}

.hero-text h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.hero-lead {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.8;
  color: #2c3a45;
  max-width: 560px;
}

.watch-path {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.watch-step {
  padding: 14px 14px 14px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-right: 1px solid var(--line);
}

.watch-step:last-child {
  border-right: 0;
  padding-right: 0;
}

.watch-step:not(:first-child) {
  padding-left: 14px;
}

.watch-step .step-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--brick);
}

.watch-step .step-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.watch-step .step-rule {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 22px;
}

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hero-figure {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

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

.tag-link {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  line-height: 1.4;
}

.tag-link:hover {
  color: var(--brick);
  border-color: var(--brick);
}

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

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

.purpose-col {
  padding: 20px 24px 20px 0;
  border-right: 1px solid var(--line);
}

.purpose-col:last-child {
  border-right: 0;
  padding-right: 0;
}

.purpose-col:not(:first-child) {
  padding-left: 24px;
}

.purpose-col h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

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

.purpose-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.editorial-note {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.editorial-media {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

.editorial-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.editorial-text h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.editorial-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.editorial-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.editorial-list h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.editorial-list p {
  margin-top: 4px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.editorial-boundary {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  padding-left: 12px;
  border-left: 2px solid var(--brick);
}

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

.playlist-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 32px;
  margin-top: 20px;
}

.playlist-main {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.playlist-media {
  overflow: hidden;
}

.playlist-media img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
}

.playlist-main-text {
  padding: 20px 20px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: center;
}

.playlist-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--brick);
  letter-spacing: 0.04em;
}

.playlist-main-text h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

.playlist-main-text p {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.playlist-side {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.playlist-side .playlist-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.playlist-side .playlist-item h3 {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.playlist-side .playlist-item h3 a {
  color: var(--ink);
}

.playlist-side .playlist-item h3 a:hover {
  color: var(--brick);
}

.playlist-side .playlist-item p {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

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

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.batch-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.batch-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--brick);
}

.batch-body h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.batch-body p {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

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

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

.player-col {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 20px;
}

.player-col h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.player-col p {
  margin-top: 10px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.player-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

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

.compare-preview .compare-table {
  margin-top: 20px;
}

.compare-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

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

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

.faq-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.feedback-band {
  padding: 40px 0 8px;
}

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

.feedback-link {
  display: block;
  padding: 20px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brick);
  border-radius: 4px;
}

.feedback-link:hover {
  border-color: var(--brick);
}

.feedback-link-title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.feedback-link-desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 内页通用外壳 ---------- */
.inner-main .page-title {
  margin-top: 4px;
}

.page-title-text .page-lead,
.page-title-main .page-lead,
.page-title-main .page-lede {
  margin-top: 12px;
  font-size: 15px;
  color: #2c3a45;
  line-height: 1.8;
  max-width: var(--read);
}

section.page-title {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
  padding: 18px 0 24px;
  border-bottom: 1px solid var(--line);
}

.page-title-meta {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 14px 16px;
}

.meta-label {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.meta-value {
  margin-top: 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.meta-value.mono {
  font-size: 14px;
}

.meta-note {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.65;
}

/* ---------- 频道目录 ---------- */
.filter-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 12px 16px;
  margin-top: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.filter-bar-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-link {
  display: inline-block;
  padding: 7px 12px;
  font-size: 13px;
  color: var(--ink);
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 4px;
  line-height: 1.4;
}

.filter-link:hover {
  color: var(--brick);
  border-color: var(--brick);
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  align-items: start;
  margin-top: 32px;
}

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

.layout-aside {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px;
}

.channel-list {
  padding-bottom: 8px;
}

.channel-item {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 80px;
}

.channel-item:first-of-type {
  border-top: 1px solid var(--line);
  margin-top: 16px;
}

.channel-item-head h3.channel-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

.channel-form {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.channel-item-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.channel-scene {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.channel-scene li {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.channel-scene li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--brick);
  border-radius: 50%;
}

.channel-enter {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.channel-enter:hover {
  border-bottom-color: var(--brick);
}

.form-compare,
.channel-choice {
  margin-top: 36px;
}

.form-compare .table-wrap {
  margin-top: 16px;
}

.channel-choice .advice-list {
  margin-top: 16px;
}

.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--brick);
}

.aside-figure {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}

.aside-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.aside-caption {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

.aside-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.aside-note-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.aside-note p {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 专题片单 ---------- */
.page-shell {
  margin-top: 0;
}

.page-shell section.page-title {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.page-shell .playlist-feature {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  gap: 32px;
  align-items: stretch;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.feature-media {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
  display: flex;
  flex-direction: column;
}

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

.feature-caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

.feature-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}

.feature-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.feature-desc {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.8;
}

.feature-spec {
  margin: 6px 0 0;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.spec-row dt {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.spec-row dd {
  margin: 0;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.7;
}

.feature-entry {
  margin-top: 4px;
}

.playlist-list {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.playlist-items {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 8px;
  border-top: 1px solid var(--line);
}

.playlist-list .playlist-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.playlist-item-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.playlist-no {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
}

.playlist-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

.playlist-scope {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
  max-width: var(--read);
}

.playlist-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--muted);
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 3px;
  line-height: 1.6;
}

.playlist-entry a {
  font-size: 14px;
}

.playlist-diff {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.playlist-diff .table-wrap {
  margin-top: 16px;
}

.order-advice {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.order-advice .advice-list {
  margin-top: 16px;
}

/* ---------- 观看说明 ---------- */
.title-with-version {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
  padding: 18px 0 24px;
  border-bottom: 1px solid var(--line);
}

.version-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brick);
  border-radius: 4px;
  padding: 14px 16px;
}

.version-block-label {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.version-block-value {
  margin-top: 4px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.version-block-scope {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.65;
}

.version-block-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
}

.version-block-link:hover {
  border-bottom-color: var(--brick);
}

.version-switch {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

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

.version-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
}

.version-item.is-current {
  border-color: var(--brick);
  background: #fdf8f5;
}

.version-no {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.02em;
}

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

.version-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  background: var(--brick);
  border-radius: 3px;
  line-height: 1.7;
}

.version-link {
  align-self: flex-start;
  font-size: 13px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.version-link:hover {
  border-bottom-color: var(--brick);
}

.prepare,
.player-controls,
.picture-audio,
.troubleshoot,
.change-log {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.prepare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 18px;
}

.prepare-col {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 18px 20px;
}

.prepare-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.prepare-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.prepare-list li {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.prepare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--brick);
  border-radius: 50%;
}

.guide-figure {
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

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

.guide-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

.control-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

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

.control-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.control-where,
.control-range,
.control-tip {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.control-tip {
  color: var(--muted);
  font-size: 13px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.picture-audio-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.picture-audio-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.picture-audio-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.picture-audio-desc,
.picture-audio-fix {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.picture-audio-fix {
  color: var(--muted);
  font-size: 13px;
}

.troubleshoot-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

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

.troubleshoot-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.troubleshoot-cause,
.troubleshoot-next {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.troubleshoot-next {
  color: var(--muted);
  font-size: 13px;
}

.change-log .table-wrap {
  margin-top: 16px;
}

.change-log-table td.mono {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
  white-space: nowrap;
}

/* ---------- 方案对比 ---------- */
.page-layout {
  margin-top: 0;
}

.page-primary {
  min-width: 0;
}

.page-aside {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px;
}

.page-aside .aside-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--brick);
}

.aside-block {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

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

.aside-subtitle {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.aside-block p {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.aside-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.aside-link:hover {
  border-bottom-color: var(--brick);
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.aside-list li {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.advice-summary {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.advice-summary h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.advice-summary .advice-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.advice-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.02em;
  padding-top: 3px;
}

.advice-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.advice-cond {
  margin-top: 4px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.advice-plan {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.dimensions {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.dimension-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.dimension-item {
  padding: 16px 18px 16px 0;
  border-right: 1px solid var(--line);
}

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

.dimension-item:not(:first-child) {
  padding-left: 18px;
}

.dimension-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.dimension-desc {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.plans {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.plans-figure {
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

.plans-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.plans-figure-caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

.plan-item {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.plan-item:last-of-type {
  border-bottom: 1px solid var(--line);
}

.plan-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

.plan-tagline {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

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

.plan-prep {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.plan-prep-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.plan-prep-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.plan-prep-list li {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.plan-prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--brick);
  border-radius: 50%;
}

.plan-scene {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.compare-table {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.compare-table .table-wrap {
  margin-top: 16px;
}

.scenes {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.scene-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

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

.scene-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.scene-desc,
.scene-fit,
.scene-unfit {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

.scene-fit {
  color: var(--ink);
}

.scene-unfit {
  color: var(--muted);
  font-size: 13px;
}

/* ---------- 常见问答 ---------- */
.faq-group {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.faq-group-head {
  margin-bottom: 16px;
}

.faq-group-head h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.faq-group-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: var(--read);
}

.triage {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.triage-head {
  margin-bottom: 16px;
}

.triage-head h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.triage-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: var(--read);
}

.triage-media {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

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

.triage-media figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

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

.triage-step {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 18px;
}

.triage-step h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.triage-step p {
  margin-top: 6px;
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.75;
}

/* ---------- 反馈说明 ---------- */
.scope-compare {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.scope-compare h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.scope-col {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 18px 20px;
}

.scope-col-in {
  border-top: 3px solid var(--brick);
}

.scope-col-out {
  border-top: 3px solid var(--muted);
}

.scope-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 4px;
}

.scope-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.scope-item-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.6;
}

.scope-item-desc {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.info-checklist {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.media-figure {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.media-caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  background: var(--cream);
}

.checklist-body h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.checklist-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.checklist-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.checklist-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.02em;
  padding-top: 2px;
}

.checklist-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.6;
}

.checklist-text p {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.review-flow {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.review-flow h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.flow-step {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 18px;
}

.flow-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--brick);
  border-radius: 3px;
  padding: 1px 9px;
  line-height: 1.7;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.flow-title {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.flow-step p {
  margin-top: 6px;
  font-size: 13px;
  color: #2c3a45;
  line-height: 1.75;
}

.page-division {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.page-division h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

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

.division-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.division-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.division-item p {
  font-size: 13px;
  color: #2c3a45;
  line-height: 1.75;
}

.division-link {
  align-self: flex-start;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.division-link:hover {
  border-bottom-color: var(--brick);
}

/* ---------- 404 ---------- */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.error-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brick);
  border-radius: 6px;
  padding: 36px 32px;
  max-width: 680px;
}

.error-code {
  font-size: 13px;
  font-weight: 700;
  color: var(--brick);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 0.06em;
}

.error-title {
  margin-top: 8px;
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}

.error-lead {
  margin-top: 12px;
  font-size: 15px;
  color: #2c3a45;
  line-height: 1.8;
}

.error-hints {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.error-hints li {
  font-size: 14px;
  color: #2c3a45;
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.error-hints li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--brick);
  border-radius: 50%;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: 24px;
}

.error-button {
  display: inline-block;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  background: var(--brick);
  border-radius: 4px;
  line-height: 1.4;
  min-height: 44px;
}

.error-button:hover {
  color: #fff;
  background: #9c3a25;
}

.error-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}

.error-link:hover {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

.error-note {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.error-note a {
  color: var(--brick);
  border-bottom: 1px solid transparent;
}

.error-note a:hover {
  border-bottom-color: var(--brick);
}

/* =========================================================
   responsive
   ========================================================= */

@media (max-width: 960px) {
  .site-header-inner {
    padding: 14px 20px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 3;
  }

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

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

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 44px;
    border-bottom: 1px solid var(--line);
    padding: 0;
  }

  .mobile-drawer {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 40;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 18px rgba(22, 35, 46, 0.08);
  }

  .mobile-drawer[hidden] {
    display: none;
  }

  .drawer-list {
    padding: 6px 20px 14px;
  }

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

  .inner-main,
  .home-main {
    padding: 0 20px 48px;
  }

  .site-footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 28px;
    padding: 32px 20px 24px;
  }

  .footer-bottom {
    padding: 14px 20px 22px;
  }

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

  .hero-text h1 {
    font-size: 28px;
  }

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

  .purpose-col,
  .purpose-col:not(:first-child) {
    padding: 18px 0;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

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

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

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

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

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

  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .layout-aside {
    max-width: none;
  }

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

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

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

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

  .dimension-item,
  .dimension-item:not(:first-child) {
    padding: 16px 0;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

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

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

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

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

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

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

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

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

@media (max-width: 640px) {
  body.site-body {
    font-size: 15px;
  }

  .info-bar-inner {
    padding: 8px 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .info-bar-meta {
    display: none;
  }

  .site-header-inner {
    padding: 12px 16px;
    gap: 12px;
  }

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

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

  .inner-main,
  .home-main {
    padding: 0 16px 40px;
  }

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

  .page-title {
    font-size: 24px;
  }

  .hero {
    padding: 24px 0 28px;
  }

  .hero-text h1 {
    font-size: 24px;
  }

  .hero-lead {
    font-size: 14px;
  }

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

  .watch-step,
  .watch-step:not(:first-child) {
    padding: 12px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-actions {
    gap: 6px 18px;
  }

  .purpose-columns,
  .editorial-note,
  .playlist-feature,
  .batches,
  .player-basics,
  .compare-preview,
  .faq-preview {
    padding: 28px 0;
  }

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

  .playlist-main-text {
    padding: 16px;
  }

  .batch-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    align-items: start;
  }

  .batch-item .text-link {
    justify-self: start;
  }

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

  .feedback-band {
    padding: 28px 0 8px;
  }

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

  .filter-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 12px;
  }

  .filter-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    width: 100%;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-link {
    white-space: nowrap;
  }

  .layout-shell {
    margin-top: 24px;
  }

  .channel-item {
    padding: 16px 0;
  }

  .form-compare,
  .channel-choice {
    margin-top: 28px;
  }

  .data-table {
    min-width: 0;
    font-size: 13px;
  }

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

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

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

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

  .advice-summary .advice-item {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }

  .spec-row {
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 12px;
  }

  .related-card,
  .related-link,
  .feedback-link {
    padding: 16px;
  }

  .error-main {
    padding: 36px 16px 56px;
  }

  .error-panel {
    padding: 26px 20px;
  }

  .error-title {
    font-size: 24px;
  }

  .site-footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 28px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px 22px;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}