/* ==========================================================================
   每日大赛APP · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --bg: #f4f2ec;
  --panel: #ffffff;
  --ink: #1f2d2a;
  --ink-soft: #5c6b66;
  --line: #c9d1c8;
  --accent: #12a37f;
  --accent-soft: #e3f4ee;
  --archive: #8a7f5c;
  --warn: #b4552e;
  --mono: "IBM Plex Mono", "Courier New", monospace;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --radius: 4px;
  --shell-max: 1120px;
  --shell-pad: 20px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--ink);
}

p {
  margin: 0 0 14px;
}

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

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

ul,
ol {
  margin: 0 0 14px;
  padding-left: 20px;
}

li {
  margin-bottom: 6px;
}

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

figure {
  margin: 0 0 18px;
}

figcaption {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

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

.mono {
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--shell-pad);
  padding-right: var(--shell-pad);
}

/* 页头 */
.site-header {
  background: var(--panel);
  border-bottom: 2px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  padding-top: 14px;
  padding-bottom: 0;
}

.brand-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 10px;
}

.brand-name {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
}

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

.brand-slogan {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* 主导航 */
.site-nav {
  margin-left: auto;
  padding-bottom: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list li {
  margin: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 11px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

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

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

/* 汉堡按钮：桌面隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 主内容 */
.site-main {
  display: block;
  padding-bottom: 48px;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 8px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.breadcrumb a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 22px;
}

.page-title {
  margin: 0;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-title-block {
  margin-bottom: 22px;
}

.page-title-block .page-lead {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-lead {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 10px;
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.meta-label {
  color: var(--ink-soft);
}

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

.meta-code,
.meta-batch,
.meta-channel,
.meta-duration,
.meta-note,
.meta-item {
  font-family: var(--mono);
  color: var(--ink);
}

.meta-tag {
  display: inline-block;
  padding: 1px 8px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--archive);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
}

/* 通用页面双栏布局 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 36px;
  align-items: start;
}

.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 320px;
}

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

.layout-aside,
.content-side,
.content-aside,
.layout-side {
  min-width: 0;
}

/* 页脚 */
.site-footer {
  margin-top: 40px;
  padding-top: 36px;
  background: var(--panel);
  border-top: 2px solid var(--line);
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 28px 24px;
  padding-bottom: 28px;
}

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

.footer-brand-name {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.footer-brand-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.footer-group-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li {
  margin: 0 0 4px;
}

.footer-links a {
  display: inline-block;
  min-height: 30px;
  padding: 3px 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

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

.footer-bottom {
  padding-top: 14px;
  padding-bottom: 22px;
  border-top: 1px solid var(--line);
}

.footer-copy {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */

.section-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.section-lead,
.section-intro,
.section-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 760px;
}

.section-foot {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.section-foot a {
  margin-right: 16px;
}

.more-link {
  display: inline-block;
  min-height: 32px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.more-link::after {
  content: " →";
}

.media-figure {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px;
  overflow: hidden;
}

.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.media-caption {
  margin: 8px 2px 0;
}

.figure-caption {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

/* 侧栏块（多页复用，父级各自限定时再细化） */
.aside-block,
.side-block {
  margin-bottom: 22px;
  padding: 16px 16px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.aside-title,
.side-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.aside-list,
.side-list,
.side-anchor-list,
.side-link-list {
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
}

.aside-list li,
.side-list li,
.side-anchor-list li,
.side-link-list li {
  margin: 0 0 8px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.aside-list li:last-child,
.side-list li:last-child,
.side-anchor-list li:last-child,
.side-link-list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.aside-list a,
.side-list a,
.side-anchor-list a,
.side-link-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.aside-list a:hover,
.side-list a:hover,
.side-anchor-list a:hover,
.side-link-list a:hover {
  color: var(--accent);
}

.aside-item {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.aside-item a {
  display: inline-block;
  margin-bottom: 2px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.aside-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.side-note,
.side-text {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: var(--accent);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #0d8a6b;
  border-color: #0d8a6b;
  color: #fff;
}

.btn-ghost {
  background: transparent;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.hero-section {
  padding: 28px 0 10px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.hero-figure {
  margin: 0 0 20px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px;
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.hero-caption {
  margin: 8px 2px 0;
}

.hero-main h1 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 32px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero-lead {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 34em;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.hero-meta .mono {
  padding: 1px 8px;
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink);
}

.hero-paths {
  min-width: 0;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.paths-title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.path-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.path-item {
  display: flex;
  gap: 14px;
  margin: 0 0 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.path-item:last-child {
  margin-bottom: 6px;
  padding-bottom: 0;
  border-bottom: 0;
}

.path-index {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 2px;
}

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

.path-name {
  display: block;
  margin-bottom: 2px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.path-desc {
  margin: 0 0 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.path-link {
  display: inline-block;
  min-height: 28px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.path-link::after {
  content: " →";
}

/* 频道标签行 */
.channel-tag-row {
  padding-top: 20px;
  padding-bottom: 6px;
}

.tag-row-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.channel-tags li {
  margin: 0;
}

.channel-tag {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.15s ease, transform 0.15s ease, color 0.15s ease;
}

.channel-tag:hover,
.channel-tag:focus-visible {
  text-decoration: none;
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* 频道速览与时间线对照 */
.compare-section {
  padding: 34px 0 8px;
}

.compare-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 28px;
  margin-top: 18px;
}

.compare-channels,
.compare-timeline {
  min-width: 0;
  padding: 18px 18px 8px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.compare-subtitle {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.channel-brief-list {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.channel-brief {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.channel-brief-link {
  display: inline-block;
  margin-bottom: 2px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

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

.channel-brief-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.timeline-block {
  margin: 0 0 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.timeline-block:last-of-type {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 0;
}

.batch-no {
  display: inline-block;
  margin-bottom: 4px;
  padding: 1px 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.timeline-heading {
  margin: 4px 0 6px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.timeline-points {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.timeline-points li {
  margin-bottom: 3px;
}

.compare-figure {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px;
  overflow: hidden;
}

.compare-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 2px;
}

/* 最近更新清单 */
.updates-section {
  padding: 34px 0 8px;
}

.update-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.update-row {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
}

.update-row:last-child {
  border-bottom: 0;
}

.update-time {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--archive);
}

.update-title {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.update-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.update-link::after {
  content: " →";
}

/* 入口核验提示条 */
.check-banner {
  padding: 34px 0 8px;
}

.check-banner-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr) auto;
  align-items: center;
  gap: 22px;
  padding: 20px;
  background: var(--panel);
  border: 2px solid var(--ink);
  border-left: 6px solid var(--warn);
  border-radius: var(--radius);
}

.check-banner-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.check-banner-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.check-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-steps .check-step {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.check-steps .check-step .mono {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--warn);
  background: #fbeee8;
  border: 1px solid var(--warn);
  border-radius: 2px;
}

.check-banner-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-family: var(--mono);
  font-size: 14px;
  color: #fff;
  background: var(--ink);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  transition: background 0.15s ease, border-color 0.15s ease;
}

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

/* 反馈与纠错说明 */
.feedback-section {
  padding: 34px 0 8px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.feedback-col {
  min-width: 0;
  padding: 18px 18px 4px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.feedback-desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.feedback-col .feedback-list {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

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

.channels-layout {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.channel-list-col {
  min-width: 0;
  padding: 18px 16px 8px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.channel-list-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.channel-list-note {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.channel-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.channel-item {
  margin: 0 0 6px;
}

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

.channel-link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  column-gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.15s ease, background 0.15s ease;
}

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

.channel-item.is-active .channel-link {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.channel-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--archive);
}

.channel-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.channel-item.is-active .channel-name {
  color: var(--accent);
}

.channel-brief-desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.channel-detail-col {
  min-width: 0;
}

.channel-figure {
  margin: 0 0 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px;
  overflow: hidden;
}

.channel-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.channel-figure-caption {
  margin: 8px 2px 0;
}

.channel-panel {
  margin: 0 0 20px;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.panel-batch {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
}

.panel-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.panel-text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.panel-subtitle {
  margin: 14px 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.panel-list {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.adjacent-block {
  margin: 24px 0 0;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.adjacent-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 14px 0 12px;
  padding: 0;
  list-style: none;
}

.adjacent-item {
  margin: 0;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.adjacent-title {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
}

.adjacent-text {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.adjacent-link {
  display: inline-block;
  min-height: 28px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.adjacent-link::after {
  content: " →";
}

.related-block {
  margin-top: 32px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.related-card {
  min-width: 0;
  padding: 16px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-card-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
}

.related-card-text {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.related-card-link {
  display: inline-block;
  min-height: 28px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.related-card-link::after {
  content: " →";
}

/* --------------------------------------------------------------------------
   pages · 专题时间线
   -------------------------------------------------------------------------- */

.timeline-intro {
  margin-bottom: 26px;
}

.timeline-intro h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.timeline-intro p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.timeline-section {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 18px;
  margin: 0 0 22px;
  padding: 18px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.timeline-batch {
  min-width: 0;
}

.timeline-batch .batch-no {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  writing-mode: horizontal-tb;
}

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

.timeline-body h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.timeline-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.timeline-body .timeline-points {
  margin: 0 0 10px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.timeline-link {
  display: inline-block;
  min-height: 30px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.timeline-link::after {
  content: " →";
}

.archive-rule {
  margin: 26px 0 0;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.archive-rule h2 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.archive-rule p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.rule-list {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.overview-block {
  margin-bottom: 26px;
  padding: 18px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.overview-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin-bottom: 8px;
}

.batch-tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.overview-name {
  margin: 0;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.overview-position {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.overview-channels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 14px;
}

.overview-label {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.channel-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.channel-tag-row li {
  margin: 0;
}

.overview-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px;
  overflow: hidden;
}

.overview-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.overview-figure figcaption {
  margin-top: 6px;
}

.card-list-section {
  margin-bottom: 26px;
}

.card-list-section h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.video-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.video-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.video-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.video-card-media {
  margin: 0;
  border-bottom: 2px solid var(--line);
  overflow: hidden;
}

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

.video-card-body {
  min-width: 0;
  padding: 12px 14px 14px;
}

.video-card-index {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
}

.video-card-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.4;
  font-weight: 600;
}

.video-card-desc {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.video-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.logic-section {
  margin-bottom: 26px;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.logic-section h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.logic-list {
  margin: 12px 0 12px;
  padding: 0;
  list-style: none;
}

.logic-item {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.logic-item-title {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
}

.logic-item-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.related-topics-section {
  margin-bottom: 8px;
}

.related-topics-section h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.related-topic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.related-topic-card {
  min-width: 0;
  padding: 14px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.related-topic-batch {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
}

.related-topic-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
}

.related-topic-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 观看指南
   -------------------------------------------------------------------------- */

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

.side-nav {
  min-width: 0;
  padding: 16px 16px 8px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.side-nav-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.step-nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-nav-item {
  margin: 0 0 6px;
}

.step-nav-item:last-child {
  margin-bottom: 0;
}

.step-nav-item a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  border: 2px solid transparent;
  border-radius: var(--radius);
}

.step-nav-item a:hover,
.step-nav-item a:focus-visible {
  text-decoration: none;
  border-color: var(--accent);
  background: var(--accent-soft);
}

.step-nav-num {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 2px;
}

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

.content-block {
  margin-bottom: 26px;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.content-block h2 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.content-block p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.check-list {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.check-item {
  display: flex;
  gap: 12px;
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.check-mark {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 2px;
}

.check-body {
  min-width: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 12px 0;
}

.path-card {
  min-width: 0;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-card h3 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
}

.path-card p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.path-steps {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.path-step-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  margin-right: 4px;
}

.label-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 12px 0;
}

.label-item {
  min-width: 0;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.label-item h3 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
}

.label-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.inline-note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.next-block {
  padding-bottom: 18px;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  padding: 14px;
  background: var(--bg);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.next-link:hover,
.next-link:focus-visible {
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-2px);
}

.next-link-title {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.next-link-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 入口核验
   -------------------------------------------------------------------------- */

.section {
  margin-bottom: 26px;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.section h2 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.step-list {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: check-step;
}

.step-item {
  display: flex;
  gap: 14px;
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.step-item .step-num {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 2px;
}

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

.step-title {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
}

.step-desc {
  margin: 0 0 4px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.step-result {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--archive);
}

.criteria-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 12px 0;
}

.criteria-item {
  min-width: 0;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.criteria-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
}

.criteria-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.feedback-item {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.feedback-title {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
}

.content-aside .aside-block {
  margin-bottom: 18px;
}

/* --------------------------------------------------------------------------
   pages · 常见问题
   -------------------------------------------------------------------------- */

.faq-figure {
  margin: 0 0 24px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px;
  overflow: hidden;
}

.faq-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.faq-group {
  margin-bottom: 26px;
}

.faq-group h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.faq-item {
  margin: 0 0 10px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

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

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

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

.faq-answer {
  padding: 0 16px 12px;
  border-top: 1px dashed var(--line);
}

.faq-answer p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.faq-next {
  font-family: var(--mono);
  font-size: 13px;
}

.faq-next a {
  color: var(--accent);
}

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

/* --------------------------------------------------------------------------
   pages · 关于与选题原则
   -------------------------------------------------------------------------- */

.page-aside {
  min-width: 0;
  padding: 16px 16px 8px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.summary-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: summary;
}

.summary-item {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.7;
}

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

.summary-item a {
  display: block;
  min-height: 28px;
  font-family: var(--mono);
  font-weight: 600;
  color: var(--ink);
}

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

.summary-desc {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
}

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

.content-section {
  margin-bottom: 26px;
  padding: 18px 18px 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
}

.content-section h2 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.content-section p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.content-figure {
  margin: 0 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px;
  overflow: hidden;
}

.content-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 2px;
}

.duty-list {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.duty-item {
  margin-bottom: 6px;
}

.principle-list {
  margin: 0 0 12px;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.principle-item {
  margin-bottom: 8px;
}

.quality-list {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.quality-item {
  margin-bottom: 6px;
}

.fix-flow {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: fix;
}

.fix-step {
  position: relative;
  margin: 0 0 10px;
  padding: 10px 12px 10px 46px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  counter-increment: fix;
}

.fix-step::before {
  content: counter(fix);
  position: absolute;
  left: 12px;
  top: 10px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 2px;
}

.step-no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  margin-right: 4px;
}

.range-control {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 12px 0;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.range-label,
.range-number-label {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.range-slider {
  flex: 1 1 200px;
  min-width: 0;
  height: 32px;
  accent-color: var(--accent);
}

.range-number {
  width: 84px;
  min-height: 36px;
  padding: 4px 8px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 2px;
}

.range-number:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.range-output {
  min-width: 64px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}

.range-hint {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  padding-top: 40px;
  padding-bottom: 60px;
}

.error-panel {
  max-width: 640px;
  padding: 28px;
  background: var(--panel);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
}

.error-code {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--warn);
}

.error-panel h1 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.error-lead {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.error-hints {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.error-hints li {
  display: flex;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.error-hint-label {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--archive);
  padding-top: 2px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.error-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .header-inner {
    gap: 6px 20px;
  }

  .nav-link {
    padding: 0 8px;
    font-size: 12px;
  }

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

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

  .channels-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 24px;
  }

  .page-layout,
  .layout-main-aside,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

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

  .footer-grid {
    grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (max-width: 880px) {
  .check-banner-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .check-banner-link {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    gap: 0;
    padding-top: 10px;
    align-items: center;
    justify-content: space-between;
  }

  .brand-row {
    padding-bottom: 10px;
  }

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

  .site-nav {
    margin-left: 0;
    width: 100%;
    position: relative;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
    margin-bottom: 10px;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    margin: 0 0 10px;
    border-top: 1px solid var(--line);
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--line);
  }

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

  .nav-link {
    width: 100%;
    min-height: 44px;
    padding: 0 4px;
    font-size: 14px;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link.is-current {
    border-bottom-color: transparent;
    border-left-color: var(--accent);
    padding-left: 8px;
  }

  .inner-main {
    padding-top: 16px;
  }

  .page-title,
  .error-panel h1 {
    font-size: 24px;
  }

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

  .hero-section {
    padding-top: 18px;
  }

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

  .hero-paths {
    order: 2;
  }

  .channel-tag-row {
    padding-top: 14px;
  }

  .channel-tags {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .channel-tags li {
    flex: 0 0 auto;
  }

  .compare-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .update-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
    padding: 12px 14px;
  }

  .update-time {
    grid-column: 1 / -1;
  }

  .update-title {
    grid-column: 1;
  }

  .update-link {
    grid-column: 2;
    justify-self: end;
  }

  .feedback-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .channel-tag-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .channel-tag-row li {
    flex: 0 0 auto;
  }

  /* 频道分类：手机端列表在前，详情在后 */
  .channels-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .channel-list-col {
    order: 1;
  }

  .channel-detail-col {
    order: 2;
  }

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

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

  /* 通用双栏：手机单列，主内容在前 */
  .page-layout,
  .layout-main-aside,
  .layout-main,
  .layout-side,
  .layout-aside,
  .content-main,
  .content-aside,
  .content-side {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-layout > .layout-main,
  .page-layout > .content-main,
  .page-layout > .layout-side,
  .page-layout > .content-aside,
  .page-layout > .content-side,
  .page-layout > .layout-aside {
    order: 1;
  }

  .page-layout > .layout-aside,
  .page-layout > .content-aside,
  .page-layout > .content-side,
  .page-layout > .layout-side {
    order: 2;
  }

  /* 观看指南：侧栏步骤导航横向条，主内容在前 */
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .sidebar-left .page-layout > .main-column,
  .page-layout.sidebar-left > .main-column,
  .sidebar-left .page-layout > .page-content,
  .page-layout.sidebar-left > .page-content {
    order: 1;
  }

  .sidebar-left .page-layout > .side-nav,
  .page-layout.sidebar-left > .side-nav,
  .sidebar-left .page-layout > .page-aside,
  .page-layout.sidebar-left > .page-aside {
    order: 2;
  }

  .step-nav-list {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .step-nav-item {
    flex: 0 0 auto;
    margin: 0;
  }

  .step-nav-item a {
    white-space: nowrap;
  }

  .summary-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .summary-item {
    margin: 0;
    padding-bottom: 6px;
  }

  .path-grid,
  .label-grid,
  .criteria-list,
  .next-links,
  .video-card-grid,
  .related-topic-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .timeline-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 14px;
  }

  .timeline-batch .batch-no {
    writing-mode: horizontal-tb;
  }

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

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

  .footer-links a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .error-panel {
    padding: 20px;
  }

  .range-control {
    gap: 8px 10px;
  }

  .range-slider {
    flex-basis: 100%;
  }
}

@media (max-width: 420px) {
  .hero-meta {
    gap: 4px 10px;
  }

  .update-row {
    padding: 10px 12px;
  }

  .check-steps {
    flex-direction: column;
    gap: 6px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}