/* =========================================================
   樱桃视频 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================= */

/* ---------------------------------------------------------
   base：变量、重置、基础排版
   --------------------------------------------------------- */
:root {
  --c-bg: #ffffff;
  --c-text: #14171a;
  --c-muted: #5b6470;
  --c-accent: #b3123c;
  --c-soft: #f5f6f8;
  --c-line: #dfe3e8;
  --c-line-soft: #eceff2;
  --container: 1120px;
  --reading: 720px;
  --radius: 6px;
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

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

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

body.site-body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--c-accent);
}

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

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

strong {
  font-weight: 600;
}

/* ---------------------------------------------------------
   layout：页头、主容器、内页骨架、页脚
   --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-text);
  padding: 6px 0;
}

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

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

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  display: inline-block;
  position: relative;
  padding: 22px 0;
  font-size: 15px;
  color: var(--c-text);
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: transparent;
  transition: background-color 0.2s ease;
}

.site-nav a:hover {
  color: var(--c-accent);
}

.site-nav a:hover::after,
.site-nav a.is-current::after {
  background: var(--c-accent);
}

.site-nav a.is-current {
  color: var(--c-accent);
  font-weight: 600;
}

.mobile-actions {
  display: none;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--c-text);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.action-link:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: var(--c-bg);
  padding: 24px;
  overflow-y: auto;
}

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

.drawer-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--c-text);
}

.drawer-close::before {
  content: "关闭";
  font-size: 13px;
}

.mobile-drawer nav {
  margin-top: 24px;
}

.mobile-drawer nav ul {
  display: flex;
  flex-direction: column;
}

.mobile-drawer nav a {
  display: block;
  padding: 14px 4px;
  font-size: 17px;
  border-bottom: 1px solid var(--c-line-soft);
}

.mobile-drawer nav a.is-current {
  color: var(--c-accent);
  font-weight: 600;
}

.site-main {
  display: block;
}

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

/* 内页统一标题区 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--c-muted);
}

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

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

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

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

.page-header {
  padding: 16px 0 20px;
  border-bottom: 1px solid var(--c-line);
}

.page-title {
  font-size: 34px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--c-text);
}

.page-head {
  padding: 20px 0 0;
}

.page-lead {
  max-width: var(--reading);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* 页脚 */
.site-footer {
  background: var(--c-soft);
  border-top: 1px solid var(--c-line);
  padding: 48px 0 0;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 36px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}

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

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 8px;
}

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

.footer-col li a {
  font-size: 14px;
  color: var(--c-muted);
  display: inline-block;
  padding: 2px 0;
}

.footer-col li a:hover {
  color: var(--c-accent);
}

.footer-bottom {
  border-top: 1px solid var(--c-line);
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------------------------------------------------------
   components：通用按钮、章节标题、区块、表格、FAQ、图片
   --------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

.btn-primary:hover {
  background: #96102f;
  color: #ffffff;
  border-color: #96102f;
}

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

.btn-ghost:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

/* 首页与内页共用的章节标题样式 */
.home-main section > h2,
.inner-main section > h2,
.container section > h2 {
  position: relative;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 600;
  color: var(--c-text);
  padding-left: 14px;
  margin-bottom: 10px;
}

.home-main section > h2::before,
.inner-main section > h2::before,
.container section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--c-accent);
}

.section-lead {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 24px;
}

.section-note {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.section-more a {
  color: var(--c-accent);
  font-weight: 600;
}

.section-more a:hover {
  text-decoration: underline;
}

/* 锚点条 */
.anchor-bar {
  margin: 20px 0 28px;
}

.anchor-bar ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.anchor-bar a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-muted);
  background: var(--c-soft);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  white-space: nowrap;
}

.anchor-bar a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

/* 图片容器统一约束 */
figure {
  min-width: 0;
}

.hero-media img,
.topic-media img,
.check-media img,
.channel-figure img,
.topic-hero img,
.guide-figure img,
.check-figure img,
.about-position-figure img,
.self-check-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--c-soft);
}

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

/* 表格 */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

caption {
  text-align: left;
  font-size: 13px;
  color: var(--c-muted);
  padding-bottom: 8px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  line-height: 1.7;
}

thead th {
  background: var(--c-soft);
  font-weight: 600;
  color: var(--c-text);
}

tbody th {
  font-weight: 600;
  color: var(--c-text);
  background: #fbfbfc;
}

tbody tr:nth-child(even) td {
  background: var(--c-soft);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 8px;
}

/* 折叠问答 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: var(--reading);
}

.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
  overflow: hidden;
}

.faq-item summary {
  position: relative;
  display: block;
  padding: 16px 48px 16px 16px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
  min-height: 48px;
}

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

.faq-item summary::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--c-muted);
  border-bottom: 2px solid var(--c-muted);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: translateY(-20%) rotate(-135deg);
}

.faq-item[open] summary {
  color: var(--c-accent);
}

.faq-answer {
  padding: 0 16px 16px;
  border-top: 1px solid var(--c-line-soft);
  padding-top: 14px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.faq-answer p + p {
  margin-top: 8px;
}

.faq-answer a {
  color: var(--c-accent);
  font-weight: 600;
}

.faq-answer a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------
   pages：首页
   --------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 32px;
  padding: 36px 0 48px;
  border-bottom: 1px solid var(--c-line);
}

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

.hero-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-bottom: 20px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 14px;
}

.hero-lead {
  max-width: 620px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 22px;
}

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

.hero-side {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.quick-channels,
.recent-rounds {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 18px;
}

.side-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
}

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

.channel-tag-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-soft);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
}

.channel-tag-list a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.round-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.round-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line-soft);
}

.round-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.round-tag {
  align-self: flex-start;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-muted);
  background: var(--c-soft);
  border-radius: 4px;
  padding: 2px 8px;
}

.round-list p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.round-list a {
  font-size: 13px;
  color: var(--c-accent);
  font-weight: 600;
}

.round-list a:hover {
  text-decoration: underline;
}

/* 频道分类总览 */
.channel-overview {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: 32px;
  align-items: start;
}

.category-aside {
  min-width: 0;
  background: var(--c-soft);
  border-radius: var(--radius);
  padding: 18px;
}

.aside-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
}

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

.category-list li {
  border-left: 3px solid transparent;
  padding-left: 10px;
}

.category-list li + li {
  margin-top: 10px;
}

.category-list li.is-current {
  border-left-color: var(--c-accent);
}

.category-list a {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  padding: 2px 0;
}

.category-list a:hover {
  color: var(--c-accent);
}

.category-list li.is-current a {
  color: var(--c-accent);
}

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

.channel-list-wrap {
  min-width: 0;
}

.channel-compact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.channel-compact-list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-line-soft);
}

.channel-compact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.item-index {
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-line);
  line-height: 1.4;
}

.channel-compact-list li:hover .item-index {
  color: var(--c-accent);
}

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

.item-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.item-body h3 a:hover {
  text-decoration: underline;
}

.item-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.item-related {
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-muted);
}

.item-related a {
  color: var(--c-accent);
  font-weight: 600;
}

.item-related a:hover {
  text-decoration: underline;
}

/* 专题片单精选 */
.topic-feature {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

.topic-media {
  width: 100%;
  aspect-ratio: 21 / 9;
  margin-bottom: 24px;
}

.topic-row-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topic-row-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--c-line-soft);
}

.topic-row-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.topic-index {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-line);
  line-height: 1.3;
}

.topic-row-list li:hover .topic-index {
  color: var(--c-accent);
}

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

.topic-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 6px;
}

.topic-body h3 a:hover {
  text-decoration: underline;
}

.topic-body > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.topic-links {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.topic-links a {
  font-size: 13px;
  color: var(--c-accent);
  font-weight: 600;
}

.topic-links a:hover {
  text-decoration: underline;
}

/* 观看指南三步概览 */
.guide-overview {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.guide-overview .step-block {
  min-width: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 18px;
}

.guide-overview .step-block h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
}

.step-triple {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.step-triple dt {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-muted);
  font-weight: 600;
}

.step-triple dd {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
  margin-bottom: 10px;
}

.step-triple dd:last-child {
  margin-bottom: 0;
}

/* 入口核验清单摘要 */
.check-summary {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

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

.check-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: check;
}

.check-list li {
  position: relative;
  padding-left: 38px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
  counter-increment: check;
}

.check-list li::before {
  content: counter(check, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.check-list strong {
  color: var(--c-text);
}

.check-media {
  width: 100%;
  aspect-ratio: 4 / 3;
}

/* 常见问题精选 */
.faq-preview {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}

/* 内容组织说明 */
.organize-note {
  padding: 48px 0 0;
}

.organize-note > p {
  max-width: var(--reading);
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.note-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
  max-width: var(--reading);
}

.note-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.note-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

.note-points a {
  color: var(--c-accent);
  font-weight: 600;
}

.note-points a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------
   pages：频道分类
   --------------------------------------------------------- */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: 32px;
  align-items: start;
  margin-top: 32px;
}

.category-side {
  min-width: 0;
  background: var(--c-soft);
  border-radius: var(--radius);
  padding: 18px;
}

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

.category-side .category-item {
  border-left: 3px solid transparent;
  padding-left: 10px;
}

.category-side .category-item + .category-item {
  margin-top: 12px;
}

.category-side .category-item a {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  padding: 2px 0;
}

.category-side .category-item a:hover {
  color: var(--c-accent);
}

.category-side .category-item p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
  margin-top: 2px;
}

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

.channel-list-section,
.channel-path {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.channel-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.channel-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line-soft);
}

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

.channel-num {
  font-size: 19px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-line);
  line-height: 1.4;
}

.channel-item:hover .channel-num {
  color: var(--c-accent);
}

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

.channel-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.channel-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.channel-topic {
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-muted);
}

.channel-topic a {
  color: var(--c-accent);
  font-weight: 600;
}

.channel-topic a:hover {
  text-decoration: underline;
}

.path-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: path;
}

.path-step {
  position: relative;
  padding-left: 40px;
  counter-increment: path;
}

.path-step::before {
  content: counter(path, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.path-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.path-step p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.path-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 18px;
  font-size: 14px;
}

.path-more a {
  color: var(--c-accent);
  font-weight: 600;
}

.path-more a:hover {
  text-decoration: underline;
}

.channel-figure {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: 8px;
}

/* ---------------------------------------------------------
   pages：专题片单
   --------------------------------------------------------- */
.container {
  max-width: var(--reading);
  margin: 0 auto;
}

.page-description {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-description a {
  color: var(--c-accent);
  font-weight: 600;
}

.page-description a:hover {
  text-decoration: underline;
}

.topic-hero {
  width: 100%;
  aspect-ratio: 21 / 9;
  margin-bottom: 32px;
}

.topic-block {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 32px;
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
  align-items: start;
}

.topic-block .topic-body {
  min-width: 0;
}

.topic-block .topic-index {
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  color: var(--c-accent);
  margin-bottom: 6px;
}

.topic-block h2 {
  font-size: 22px;
  line-height: 1.35;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 10px;
  padding-left: 0;
}

.topic-block h2::before {
  display: none;
}

.topic-block .topic-body > p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 16px;
}

.topic-block h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 8px;
}

.topic-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.topic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

.topic-side {
  min-width: 0;
  background: var(--c-soft);
  border-radius: var(--radius);
  padding: 18px;
}

.topic-side h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 10px;
}

.topic-channel-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-channel-links a {
  display: inline-block;
  font-size: 14px;
  color: var(--c-accent);
  font-weight: 600;
  padding: 2px 0;
}

.topic-channel-links a:hover {
  text-decoration: underline;
}

.topic-order {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-muted);
}

.topic-summary {
  padding-bottom: 8px;
}

.topic-summary > p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 12px;
}

.topic-summary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: summary;
  margin-top: 8px;
}

.topic-summary-list li {
  position: relative;
  padding-left: 34px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  counter-increment: summary;
}

.topic-summary-list li::before {
  content: counter(summary, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

/* ---------------------------------------------------------
   pages：观看指南
   --------------------------------------------------------- */
.page-intro {
  padding-top: 20px;
}

.guide-figure {
  width: 100%;
  aspect-ratio: 21 / 9;
  margin-bottom: 32px;
}

.guide-steps {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.guide-steps .step-block {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.guide-steps .step-block:last-child {
  margin-bottom: 0;
}

.guide-steps .step-block h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 14px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  margin-right: 8px;
  padding: 0 6px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #ffffff;
  background: var(--c-accent);
  border-radius: 4px;
  vertical-align: 2px;
}

.guide-steps .step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.step-cell {
  min-width: 0;
  background: var(--c-soft);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.step-cell-alert {
  background: #fdf1f4;
}

.cell-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-muted);
  margin-bottom: 4px;
}

.step-cell > p:last-child {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-text);
}

.step-cell a {
  color: var(--c-accent);
  font-weight: 600;
}

.step-cell a:hover {
  text-decoration: underline;
}

.prepare-table {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.rollback {
  padding-bottom: 32px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--c-line);
}

.rollback-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: rollback;
}

.rollback-list li {
  position: relative;
  padding-left: 38px;
  counter-increment: rollback;
}

.rollback-list li::before {
  content: counter(rollback, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.rollback-list h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.rollback-list p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 16px 0 0;
}

.related-links-label {
  font-size: 13px;
  color: var(--c-muted);
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-soft);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
}

.related-links-item:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

/* ---------------------------------------------------------
   pages：入口核验
   --------------------------------------------------------- */
.section-block {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.section-block > p {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.checklist-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.checklist-layout .check-list {
  gap: 18px;
}

.check-item {
  position: relative;
  padding-left: 38px;
}

.check-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.check-standard {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.check-tip {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-accent);
}

.check-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.symptom-table {
  font-size: 14px;
}

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

.info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: info;
}

.info-list li {
  position: relative;
  padding-left: 38px;
  counter-increment: info;
}

.info-list li::before {
  content: counter(info, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.info-list h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.info-list p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.section-block .section-note {
  margin-top: 20px;
  margin-bottom: 0;
}

.section-block .section-note a {
  color: var(--c-accent);
  font-weight: 600;
}

.section-block .section-note a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------
   pages：关于本站
   --------------------------------------------------------- */
.about-position {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--c-line);
}

.about-position-text {
  min-width: 0;
}

.about-position-text > p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.about-position-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.about-principles {
  padding: 32px 0;
  border-bottom: 1px solid var(--c-line);
}

.about-principles > p {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  counter-reset: principle;
}

.principle-item {
  position: relative;
  padding-left: 40px;
  counter-increment: principle;
}

.principle-item::before {
  content: counter(principle, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.principle-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.principle-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.about-boundary {
  padding: 32px 0;
  border-bottom: 1px solid var(--c-line);
}

.about-boundary > p {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

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

.boundary-item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 12px 14px;
  background: var(--c-soft);
  border-radius: var(--radius);
}

.boundary-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  padding-top: 1px;
}

.boundary-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text);
}

.about-maintain {
  padding: 32px 0 0;
}

.about-maintain > p {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.about-maintain-note {
  padding-top: 8px;
}

.about-maintain-note a {
  color: var(--c-accent);
  font-weight: 600;
  margin-right: 16px;
}

.about-maintain-note a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------
   pages：常见问题
   --------------------------------------------------------- */
.faq-section {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.self-check-section {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.self-check-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.self-check-list {
  min-width: 0;
}

.self-check-list ol {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: selfcheck;
}

.self-check-list li {
  position: relative;
  padding-left: 38px;
  counter-increment: selfcheck;
}

.self-check-list li::before {
  content: counter(selfcheck, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.self-check-list h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.self-check-list p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.self-check-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.feedback-section {
  padding-bottom: 8px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: feedback;
}

.feedback-list li {
  position: relative;
  padding-left: 38px;
  counter-increment: feedback;
}

.feedback-list li::before {
  content: counter(feedback, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

.feedback-list h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.feedback-list p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.feedback-tail {
  margin-top: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.feedback-tail a {
  color: var(--c-accent);
  font-weight: 600;
}

.feedback-tail a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------
   pages：404
   --------------------------------------------------------- */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.error-inner {
  max-width: var(--reading);
}

.error-code {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  margin-bottom: 8px;
}

.error-inner h1 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 12px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 28px;
}

.error-paths {
  padding: 24px 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.error-paths h2 {
  position: relative;
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text);
  padding-left: 14px;
  margin-bottom: 16px;
}

.error-paths h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 3px;
  background: var(--c-accent);
}

.error-paths ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.error-paths a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-soft);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
}

.error-paths a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.error-note {
  margin: 24px 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.error-note a {
  color: var(--c-accent);
  font-weight: 600;
  margin-right: 12px;
}

.error-note a:hover {
  text-decoration: underline;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  background: var(--c-accent);
  border-radius: var(--radius);
}

.error-home-link:hover {
  background: #96102f;
  color: #ffffff;
}

/* ---------------------------------------------------------
   responsive：1024 / 768 / 480
   --------------------------------------------------------- */
@media (max-width: 1024px) {
  .header-inner {
    gap: 20px;
  }

  .site-nav ul {
    gap: 18px;
  }

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

  .hero h1 {
    font-size: 34px;
  }

  .hero-side {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
  }

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

  .category-aside,
  .category-side {
    display: block;
  }

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

  .check-layout,
  .checklist-layout,
  .self-check-layout,
  .about-position {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand {
    font-size: 18px;
  }

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

  .mobile-actions {
    display: flex;
  }

  .home-main,
  .inner-main,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
    padding-bottom: 56px;
  }

  .breadcrumb {
    font-size: 12px;
    padding-top: 16px;
  }

  .page-header {
    padding: 12px 0 16px;
  }

  .page-title {
    font-size: 26px;
    line-height: 1.3;
  }

  .hero {
    padding: 24px 0 32px;
  }

  .hero h1 {
    font-size: 28px;
    line-height: 1.3;
  }

  .hero-lead {
    font-size: 15px;
    line-height: 1.8;
  }

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

  .home-main section > h2,
  .inner-main section > h2,
  .container section > h2 {
    font-size: 20px;
  }

  .channel-overview,
  .topic-feature,
  .guide-overview,
  .check-summary,
  .faq-preview {
    padding: 32px 0;
  }

  .channel-compact-list li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .item-index {
    font-size: 17px;
  }

  .topic-row-list li {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .topic-index {
    font-size: 20px;
  }

  .topic-media,
  .topic-hero,
  .guide-figure {
    aspect-ratio: 16 / 9;
  }

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

  .channel-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .channel-num {
    font-size: 17px;
  }

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

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

  .footer-col {
    border-bottom: 1px solid var(--c-line);
  }

  .footer-title {
    margin: 0;
    padding: 14px 0;
    font-size: 15px;
  }

  .footer-col > p,
  .footer-col > ul {
    padding-bottom: 12px;
  }

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

  .error-inner h1 {
    font-size: 26px;
  }

  .error-main {
    padding-top: 40px;
  }
}

@media (max-width: 480px) {
  body.site-body {
    font-size: 15px;
  }

  .header-inner {
    gap: 8px;
  }

  .action-link {
    min-height: 38px;
    padding: 0 10px;
    font-size: 13px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .page-lead,
  .section-lead,
  .section-note {
    font-size: 14px;
  }

  .anchor-bar ul {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .anchor-bar a {
    flex: 0 0 auto;
    min-height: 36px;
    font-size: 13px;
    padding: 0 12px;
  }

  .faq-item summary {
    font-size: 15px;
    padding: 14px 44px 14px 14px;
  }

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

  .faq-answer p,
  .step-cell > p:last-child,
  .topic-points li,
  .section-block > p,
  .about-position-text > p,
  .principle-item p,
  .info-list p,
  .rollback-list p,
  .path-step p {
    font-size: 14px;
  }

  .symptom-table {
    font-size: 13px;
  }

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

  .error-paths ul {
    flex-direction: column;
  }

  .error-paths a {
    width: 100%;
    justify-content: flex-start;
  }
}

/* 减少动效偏好：关闭过渡与平滑滚动 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}