/* ==========================================================================
   蜂鸟影视 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

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

:root {
  --c-bg: #f4f2ed;
  --c-ink: #1f2a24;
  --c-ink-soft: #4a6157;
  --c-accent: #8c6e4a;
  --c-sand: #d8d2c6;
  --c-sand-deep: #ebe6dc;
  --c-alert: #b0472f;
  --c-line: #cfc8ba;
  --c-line-soft: #e2ddd2;
  --c-surface: #fbfaf6;
  --font-serif: "Songti SC", "SimSun", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;
  --w-shell: 1200px;
  --radius: 6px;
  --shadow-soft: 0 1px 2px rgba(31, 42, 36, 0.05), 0 8px 20px -14px rgba(31, 42, 36, 0.35);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body.site-body {
  margin: 0;
  background-color: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.4;
  color: var(--c-ink);
}

p {
  margin: 0;
}

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

dl,
dd {
  margin: 0;
}

dt {
  margin: 0;
}

figure {
  margin: 0;
}

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

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

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

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

/* --------------------------------------------------------------------------
   2. layout —— 全站骨架：页头 / 主容器 / 面包屑 / 页标题 / 页脚
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(244, 242, 237, 0.96);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  flex: 0 0 auto;
  padding: 6px 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-ink);
  line-height: 1.3;
}

.brand-slogan {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-ink-soft);
  line-height: 1.4;
}

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

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

.nav-list li {
  display: block;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 0.94rem;
  color: var(--c-ink-soft);
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 8px;
  height: 1px;
  background-color: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-ink);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.is-current::after {
  transform: scaleX(1);
}

.nav-link.is-current {
  color: var(--c-ink);
  font-weight: 600;
}

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

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

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

.inner-main {
  padding-top: 8px;
  padding-bottom: 72px;
}

/* 统一内页标题字体与字重 */
.page-title {
  font-family: var(--font-serif);
  font-size: 2.125rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  margin: 0;
}

.breadcrumb {
  display: block;
  font-size: 0.82rem;
  color: var(--c-ink-soft);
  line-height: 1.6;
}

.inner-main > .breadcrumb {
  margin: 20px 0 0;
}

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

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-ink-soft);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--c-line);
}

.breadcrumb-item a,
.breadcrumb a {
  color: var(--c-ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.breadcrumb-item a:hover,
.breadcrumb a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

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

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

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

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

.page-lead,
.page-title-lead {
  margin-top: 14px;
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.page-meta,
.page-title-meta,
.page-updated {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--c-ink-soft);
}

.meta-label {
  color: var(--c-accent);
  margin-right: 6px;
}

.page-kicker {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 10px;
  border: 1px solid var(--c-accent);
  border-radius: 3px;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  line-height: 1.8;
}

.page-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  margin-top: 32px;
}

.page-layout.layout-shell {
  grid-template-columns: minmax(0, 1fr) 220px;
}

.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

.site-footer {
  margin-top: 24px;
  background-color: #1f2a24;
  color: #d8d2c6;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 48px 24px 28px;
}

.footer-brand {
  max-width: 460px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #f4f2ed;
  margin-bottom: 10px;
}

.footer-brand-text {
  font-size: 0.9rem;
  line-height: 1.85;
  color: #b9c2b8;
}

.footer-links {
  display: flex;
  gap: 56px;
}

.footer-link-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 88px;
}

.footer-link-col a {
  display: inline-block;
  padding: 2px 0;
  font-size: 0.9rem;
  color: #d8d2c6;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-link-col a:hover,
.footer-link-col a:focus-visible {
  color: #f4f2ed;
  border-bottom-color: var(--c-accent);
}

.footer-note {
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 24px 32px;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: #8f9b90;
  border-top: 1px solid rgba(216, 210, 198, 0.14);
  padding-top: 18px;
}

/* --------------------------------------------------------------------------
   3. components —— 通用按钮 / 链接 / 章节头 / 侧栏 / 图片框
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: var(--c-ink);
  color: #f4f2ed;
  border-color: var(--c-ink);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #33443b;
  border-color: #33443b;
}

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

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-accent);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.text-link::after {
  content: "→";
  font-size: 0.9em;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-ink);
}

.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-ink);
}

.section-desc,
.section-intro,
.section-note,
.section-lead {
  margin-top: 10px;
  max-width: 720px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

/* 侧栏通用 */
.toc-sidebar,
.toc.sidebar,
.page-side {
  position: sticky;
  top: 96px;
  padding: 20px 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.toc-title,
.side-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line-soft);
}

.toc-list,
.side-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-item,
.side-nav li {
  display: block;
}

.toc-item a,
.toc-link,
.side-nav a {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 3px;
  font-size: 0.9rem;
  color: var(--c-ink-soft);
  line-height: 1.5;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.toc-item a:hover,
.toc-link:hover,
.side-nav a:hover {
  color: var(--c-ink);
  background-color: var(--c-sand-deep);
}

.toc-link.is-current {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background-color: var(--c-sand-deep);
  font-weight: 600;
}

.side-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line-soft);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

/* 图片框通用 */
figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

figcaption {
  margin-top: 8px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--c-ink-soft);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin: 40px 0 0;
  padding: 18px 0;
  border-top: 1px solid var(--c-line-soft);
  font-size: 0.88rem;
}

.related-links-label {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--c-ink-soft);
}

.related-links a {
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

/* 相关链接列表（内页） */
.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.related-list li {
  display: block;
}

.related-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  font-size: 0.9rem;
  color: var(--c-ink);
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.related-entry {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--c-line-soft);
}

/* --------------------------------------------------------------------------
   4. pages
   -------------------------------------------------------------------------- */

/* 4.1 首页 */
.home-main {
  padding-bottom: 64px;
}

.hero {
  display: grid;
  grid-template-columns: 4fr 7fr;
  gap: 56px;
  align-items: center;
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--c-line-soft);
}

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

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--c-accent);
  margin-bottom: 14px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: 0.01em;
  color: var(--c-ink);
}

.hero-lead {
  margin-top: 18px;
  max-width: 420px;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--c-ink-soft);
}

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

.hero-note {
  margin-top: 18px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

.hero-media {
  position: relative;
  min-width: 0;
}

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

.hero-caption {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--c-ink-soft);
}

.channel-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  grid-column: 1 / -1;
  padding-top: 22px;
  margin-top: 6px;
  border-top: 1px solid var(--c-line-soft);
}

.channel-tag {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 2px;
  font-size: 0.88rem;
  color: var(--c-ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.channel-tag:hover,
.channel-tag:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-accent);
}

.channel-map {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.channel-map-toc {
  align-self: start;
}

.channel-map-toc .section-title {
  font-size: 1.4rem;
}

.channel-map-toc .toc-list {
  margin-top: 18px;
  gap: 2px;
}

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

.channel-rows {
  display: flex;
  flex-direction: column;
}

.channel-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 180px;
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.channel-row:first-child {
  border-top: 1px solid var(--c-line-soft);
}

.channel-index {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-accent);
}

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

.channel-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.channel-position {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.channel-terms {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--c-ink-soft);
  text-align: right;
}

.channel-map-more {
  margin-top: 20px;
  font-size: 0.9rem;
}

.focus-special {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr) 220px;
  gap: 40px;
  align-items: start;
  padding: 56px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

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

.focus-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.focus-caption {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--c-ink-soft);
}

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

.focus-label {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.focus-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-ink);
  margin-bottom: 14px;
}

.focus-text {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--c-ink-soft);
  margin-bottom: 12px;
}

.focus-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.focus-field {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 2px 12px;
  border: 1px solid var(--c-accent);
  border-radius: 3px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-accent);
}

.focus-side {
  padding: 20px 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.focus-side-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line-soft);
}

.field-list dt {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-top: 12px;
}

.field-list dt:first-child {
  margin-top: 0;
}

.field-list dd {
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--c-ink-soft);
  margin-top: 4px;
}

.focus-side-more {
  margin-top: 16px;
  font-size: 0.85rem;
}

.batch-timeline,
.entry-check,
.quick-faq {
  max-width: 900px;
  margin: 0 auto;
  padding: 56px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.batch-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.batch-item:first-child {
  border-top: 1px solid var(--c-line-soft);
}

.batch-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--c-accent);
  padding-top: 2px;
}

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

.batch-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.batch-target,
.batch-impact {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.batch-impact {
  margin-top: 4px;
}

.batch-more,
.entry-more,
.faq-more {
  margin-top: 20px;
  font-size: 0.9rem;
}

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: entry;
}

.entry-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.entry-item:first-child {
  border-top: 1px solid var(--c-line-soft);
}

.entry-index {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-accent);
}

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

.entry-title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.entry-text {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

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

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 0;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--c-accent);
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 0 18px;
}

.faq-answer p {
  max-width: 720px;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

/* 4.2 频道目录 */
.channel-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  font-size: 0.9rem;
}

.channel-table caption {
  caption-side: top;
  padding-bottom: 10px;
  font-size: 0.82rem;
  color: var(--c-ink-soft);
  text-align: left;
}

.channel-table th,
.channel-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line-soft);
  line-height: 1.75;
}

.channel-table thead th {
  background-color: var(--c-sand-deep);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  border-bottom-color: var(--c-line);
}

.channel-table tbody th {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-ink);
  white-space: nowrap;
}

.channel-table tbody td {
  color: var(--c-ink-soft);
}

.channel-table tbody tr:hover td,
.channel-table tbody tr:hover th {
  background-color: var(--c-surface);
}

.channel-detail-list {
  margin-top: 48px;
}

.channel-detail {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.channel-detail:first-of-type {
  border-top: 1px solid var(--c-line-soft);
}

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

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

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

.channel-body h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 10px;
}

.channel-scene-label {
  margin-top: 14px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--c-accent);
}

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

.channel-scene-list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.channel-scene-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--c-accent);
}

.channel-boundary {
  margin-top: 14px;
  padding: 10px 14px;
  border-left: 2px solid var(--c-sand);
  background-color: var(--c-surface);
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.boundary-note {
  margin-top: 48px;
}

.boundary-pair {
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.boundary-pair-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.boundary-pair-text {
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.special-map {
  margin-top: 48px;
}

.special-map-list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--c-line-soft);
}

.special-map-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.special-map-channel {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ink);
}

.special-map-link {
  font-size: 0.9rem;
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.special-map-link:hover {
  border-bottom-color: var(--c-accent);
}

.special-map-note {
  margin-top: 18px;
  font-size: 0.9rem;
}

/* 4.3 专题片单 */
.content-main {
  min-width: 0;
}

.content-main > .breadcrumb {
  margin: 0 0 4px;
}

.special-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.special-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.special-card:hover {
  border-color: var(--c-line);
  box-shadow: var(--shadow-soft);
}

.special-card-media {
  min-width: 0;
}

.special-card-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 0;
}

.special-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px 18px;
  min-width: 0;
}

.special-card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-ink);
}

.special-card-basis {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.special-card-order {
  margin-top: 4px;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
  border-radius: 3px;
  padding: 2px 8px;
}

.field-legend {
  margin-top: 44px;
}

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

.legend-item {
  padding: 14px 16px;
  border-left: 2px solid var(--c-sand);
  background-color: var(--c-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.legend-item dt {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.legend-item dd {
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.order-logic {
  margin-top: 44px;
}

.logic-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.logic-item {
  padding: 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.logic-item h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.logic-item p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.past-specials {
  margin-top: 44px;
}

.past-list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--c-line-soft);
}

.past-item {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 160px;
  gap: 20px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.past-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
}

.past-note {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.past-period {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--c-accent);
  text-align: right;
}

.filter {
  position: sticky;
  top: 96px;
  padding: 20px 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.filter-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  margin-bottom: 10px;
}

.filter-note {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
  margin-bottom: 14px;
}

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

.filter-list li {
  display: block;
}

.filter-chip {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 40px;
  padding: 6px 12px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-bg);
  font-size: 0.88rem;
  color: var(--c-ink-soft);
  text-align: left;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.filter-chip:hover {
  border-color: var(--c-accent);
  color: var(--c-ink);
}

.filter-chip.is-active {
  border-color: var(--c-accent);
  background-color: var(--c-sand-deep);
  color: var(--c-ink);
  font-weight: 600;
}

.filter-hint {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--c-line-soft);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

/* 4.4 整理批次 */
.timeline-figure {
  margin: 24px 0 8px;
}

.timeline-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

.timeline-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.timeline-item:first-child {
  border-top: 1px solid var(--c-line-soft);
}

.timeline-stamp {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 2px;
}

.timeline-stamp time {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--c-accent);
}

.batch-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--c-ink-soft);
}

.timeline-body {
  min-width: 0;
  padding-left: 24px;
  border-left: 1px solid var(--c-line-soft);
}

.batch-detail {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 16px;
  margin-top: 10px;
}

.batch-detail dt {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-ink);
}

.batch-detail dd {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
  min-width: 0;
}

.batch-example {
  margin-top: 48px;
}

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

.example-col {
  padding: 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.example-label {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-line-soft);
}

.example-col p {
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.example-note {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--c-accent);
}

.archive-note {
  margin-top: 48px;
}

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

.archive-item {
  padding: 18px;
  border-left: 2px solid var(--c-sand);
  background-color: var(--c-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.archive-item-title {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.archive-item p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

/* 4.5 观看指南 */
.prepare-list,
.step-flow,
.exception-note,
.share-block,
.guide-related {
  margin-top: 44px;
}

.prepare-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
}

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

.prepare-item {
  padding: 14px 16px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.prepare-item-name {
  font-family: var(--font-serif);
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.prepare-item-text {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.step-media {
  margin: 20px 0 8px;
}

.step-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

.step-media-caption {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--c-ink-soft);
}

.step-flow .step-list {
  position: relative;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step-flow .step-item {
  position: relative;
  padding: 0 0 28px 52px;
}

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

.step-flow .step-item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  bottom: 0;
  width: 1px;
  background-color: var(--c-line);
}

.step-flow .step-item:last-child::before {
  display: none;
}

.step-flow .step-index {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--c-accent);
  background-color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-accent);
}

.step-flow .step-title {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 10px;
  padding-top: 4px;
}

.step-detail {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px 16px;
  padding: 14px 16px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.step-detail dt {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 0.04em;
}

.step-detail dd {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
  min-width: 0;
}

.exception-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--c-line-soft);
}

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

.exception-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.exception-text {
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.exception-link {
  margin-top: 18px;
  font-size: 0.9rem;
}

.share-address {
  margin-top: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.share-label {
  grid-column: 1 / -1;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--c-ink-soft);
}

.share-input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--c-ink);
}

.share-copy {
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--c-ink);
  border-radius: var(--radius);
  background-color: var(--c-ink);
  color: #f4f2ed;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition: background-color 0.2s ease;
}

.share-copy:hover {
  background-color: #33443b;
}

.share-hint {
  margin-top: 10px;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--c-alert);
}

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

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

.related-item a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-ink);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.related-text {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

/* 4.6 问题反馈 */
.page-body {
  display: flex;
  flex-direction: column;
  gap: 40px;
  min-width: 0;
}

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

.issue-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--c-line-soft);
}

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

.issue-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.issue-sample {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.section-media {
  margin: 20px 0 8px;
}

.section-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

.check-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: check;
}

.check-item {
  position: relative;
  padding: 14px 16px 14px 48px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  counter-increment: check;
}

.check-item::before {
  content: counter(check, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-accent);
}

.check-name {
  font-family: var(--font-serif);
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 4px;
}

.check-hint {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.content-section .step-list {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.content-section .step-item {
  padding: 16px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  min-width: 0;
}

.content-section .step-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.content-section .step-text {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.section-tail {
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--c-ink-soft);
}

.copy-block {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.copy-text {
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.copy-address {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px dashed var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink);
  word-break: break-all;
}

.copy-btn {
  margin-top: 14px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--c-ink);
  border-radius: var(--radius);
  background-color: var(--c-ink);
  color: #f4f2ed;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition: background-color 0.2s ease;
}

.copy-btn:hover {
  background-color: #33443b;
}

.copy-tip {
  margin-top: 10px;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--c-alert);
}

/* 4.7 关于本站 */
.about-content {
  display: flex;
  flex-direction: column;
  gap: 44px;
  min-width: 0;
}

.about-intro .section-lead,
.columns-note .section-lead,
.edit-principles .section-lead {
  margin-top: 10px;
}

.about-figure {
  margin: 20px 0 4px;
}

.about-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

.figure-caption {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--c-ink-soft);
}

.about-body {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-body p {
  max-width: 720px;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--c-ink-soft);
}

.column-role-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--c-line-soft);
}

.column-role-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.column-role-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ink);
}

.column-role-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
  min-width: 0;
}

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

.principle-item {
  padding: 18px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  min-width: 0;
}

.principle-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.principle-text {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.principle-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 2px solid var(--c-sand);
  background-color: var(--c-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.principle-note p {
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.term-card {
  padding: 22px 20px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  align-self: start;
}

.term-card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.term-card-lead {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line-soft);
}

.term-list {
  margin-top: 6px;
}

.term-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

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

.term-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 2px;
}

.term-desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

.about-cta {
  margin-top: 8px;
  padding: 22px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.about-cta-text {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.about-cta-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-top: 16px;
}

/* 4.8 404 */
.error-main {
  padding-top: 72px;
  padding-bottom: 96px;
}

.error-panel {
  max-width: 620px;
  padding: 40px 32px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--c-accent);
  margin-bottom: 12px;
}

.error-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--c-ink);
}

.error-text {
  margin-top: 14px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--c-ink);
  background-color: transparent;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

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

.error-btn-primary {
  background-color: var(--c-ink);
  border-color: var(--c-ink);
  color: #f4f2ed;
}

.error-btn-primary:hover {
  background-color: #33443b;
  border-color: #33443b;
  color: #f4f2ed;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--c-line-soft);
}

.error-links a {
  font-size: 0.9rem;
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

/* --------------------------------------------------------------------------
   5. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .page-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 32px;
  }

  .page-layout.layout-shell {
    grid-template-columns: minmax(0, 1fr) 200px;
  }

  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
  }

  .hero {
    gap: 36px;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .channel-map {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
  }

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

  .focus-side {
    grid-column: 1 / -1;
  }

  .special-grid {
    gap: 20px;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav.site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    padding: 0 24px;
    background-color: var(--c-bg);
    border-bottom: 1px solid var(--c-line);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
  }

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

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

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

  .nav-link {
    display: flex;
    min-height: 48px;
    padding: 0 4px;
    font-size: 1rem;
  }

  .nav-link::after {
    left: 4px;
    right: 4px;
    bottom: 10px;
  }

  .header-inner {
    position: relative;
    min-height: 64px;
  }

  .channel-row {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .channel-terms {
    grid-column: 2 / -1;
    text-align: left;
  }

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

  .past-item {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .past-period {
    grid-column: 2 / -1;
    text-align: left;
  }
}

@media (max-width: 720px) {
  html {
    font-size: 15.5px;
  }

  .header-inner {
    padding: 0 16px;
    min-height: 60px;
  }

  .brand-name {
    font-size: 1.15rem;
  }

  .brand-slogan {
    font-size: 0.68rem;
  }

  .primary-nav.site-nav {
    padding: 0 16px;
  }

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

  .inner-main {
    padding-bottom: 48px;
  }

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

  .page-lead,
  .page-title-lead {
    font-size: 0.95rem;
  }

  /* 首页 hero：文字 → 主图 → 标签带 */
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 0 28px;
  }

  .hero-title {
    font-size: 1.85rem;
  }

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

  .hero-media img {
    aspect-ratio: 16 / 11;
  }

  .channel-strip {
    padding-top: 18px;
    margin-top: 0;
  }

  /* 频道目录概览：单列 */
  .channel-map {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 36px 0;
  }

  .channel-map-toc {
    position: static;
  }

  .channel-map-toc .toc-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
  }

  .channel-map-toc .toc-list a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 4px 12px;
    border: 1px solid var(--c-line-soft);
    border-left: 1px solid var(--c-line-soft);
    border-radius: var(--radius);
    background-color: var(--c-surface);
  }

  .channel-row {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 0;
  }

  .channel-terms {
    grid-column: 2 / -1;
    font-size: 0.78rem;
  }

  /* 焦点专题：图 → 文 → 字段说明 */
  .focus-special {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 36px 0;
  }

  .focus-media img {
    aspect-ratio: 16 / 10;
  }

  .focus-side {
    grid-column: auto;
  }

  /* 时间线 / 步骤 / FAQ 单列限宽 */
  .batch-timeline,
  .entry-check,
  .quick-faq {
    padding: 36px 0;
  }

  .batch-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 0;
  }

  .entry-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 0;
  }

  .faq-question {
    font-size: 0.98rem;
  }

  /* 内页布局：单列，正文在辅助侧栏之前 */
  .page-layout,
  .page-layout.layout-shell,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    margin-top: 24px;
  }

  /* 侧栏在 DOM 中位于主内容之前时，用 order 保证正文在前 */
  .page-layout.sidebar-left > .toc-sidebar,
  .page-layout.sidebar-left > .page-side {
    order: 2;
  }

  .page-layout.sidebar-left > .site-main,
  .page-layout.sidebar-left > .page-body {
    order: 1;
  }

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

  .page-layout > .filter {
    order: 2;
  }

  .toc-sidebar,
  .toc.sidebar,
  .page-side,
  .filter {
    position: static;
    padding: 16px;
  }

  .toc-sidebar .toc-list,
  .toc.sidebar .toc-list,
  .page-side .side-nav,
  .filter-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .toc-sidebar .toc-item,
  .toc.sidebar .toc-item,
  .page-side .side-nav li,
  .filter-list li {
    flex: 0 0 auto;
  }

  .toc-sidebar .toc-item a,
  .toc.sidebar .toc-link,
  .page-side .side-nav a,
  .filter-chip {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 4px 12px;
    border: 1px solid var(--c-line-soft);
    border-left: 1px solid var(--c-line-soft);
    border-radius: var(--radius);
    background-color: var(--c-bg);
    font-size: 0.86rem;
    width: auto;
  }

  .toc-sidebar .toc-item a.is-current,
  .toc.sidebar .toc-link.is-current,
  .filter-chip.is-active {
    border-color: var(--c-accent);
    background-color: var(--c-sand-deep);
    color: var(--c-ink);
  }

  .filter-list {
    display: flex;
  }

  .filter-chip {
    width: auto;
  }

  /* 频道目录内页 */
  .channel-table {
    display: block;
    border-collapse: separate;
  }

  .channel-table thead {
    display: none;
  }

  .channel-table tbody,
  .channel-table tr,
  .channel-table th,
  .channel-table td {
    display: block;
    width: 100%;
  }

  .channel-table caption {
    display: block;
  }

  .channel-table tr {
    margin-bottom: 14px;
    padding: 12px 14px;
    border: 1px solid var(--c-line-soft);
    border-radius: var(--radius);
    background-color: var(--c-surface);
  }

  .channel-table th,
  .channel-table td {
    padding: 4px 0;
    border-bottom: 0;
    white-space: normal;
  }

  .channel-table tbody th {
    font-size: 1.02rem;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--c-line-soft);
    margin-bottom: 6px;
  }

  .channel-table td::before {
    content: attr(data-label);
  }

  .channel-detail {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 22px 0;
  }

  .channel-figure img {
    aspect-ratio: 16 / 10;
  }

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

  /* 专题片单 */
  .special-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

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

  .past-period {
    grid-column: auto;
  }

  /* 整理批次 */
  .timeline-figure img {
    aspect-ratio: 16 / 9;
  }

  .timeline-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 20px 0;
  }

  .timeline-stamp {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .timeline-body {
    padding-left: 0;
    border-left: 0;
    padding-top: 12px;
    border-top: 1px solid var(--c-line-soft);
  }

  .batch-detail {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 6px 12px;
  }

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

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

  /* 观看指南 */
  .prepare-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-flow .step-item {
    padding-left: 44px;
  }

  .step-flow .step-item::before {
    left: 13px;
  }

  .step-detail {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 6px 12px;
    padding: 12px 14px;
  }

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

  .share-copy {
    width: 100%;
  }

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

  /* 问题反馈 */
  .content-section .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-body {
    gap: 32px;
  }

  /* 关于本站 */
  .column-role-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .about-cta-links {
    gap: 10px;
  }

  .about-cta-links .btn,
  .about-cta-links .text-link {
    min-height: 44px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 16px 24px;
  }

  .footer-links {
    gap: 32px;
  }

  .footer-note {
    padding: 16px 16px 28px;
  }

  /* 404 */
  .error-main {
    padding-top: 40px;
    padding-bottom: 56px;
  }

  .error-panel {
    padding: 28px 20px;
  }

  .error-title {
    font-size: 1.6rem;
  }
}

@media (max-width: 420px) {
  .brand-slogan {
    display: none;
  }

  .hero-title {
    font-size: 1.7rem;
  }

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

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

  .footer-links {
    flex-direction: column;
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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