/* ==========================================================================
   樱花高清电视剧 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1f3a5f;
  --color-primary-deep: #16293f;
  --color-accent: #c94f4f;
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #2b2f36;
  --color-text-soft: #5b6472;
  --color-text-mute: #7d8794;
  --color-line: #dfe3e8;
  --color-line-strong: #c9d0d8;
  --radius-card: 6px;
  --radius-small: 4px;
  --shadow-soft: 0 1px 2px rgba(31, 58, 95, 0.06);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas,
    "Courier New", monospace;
  --container-wide: 1080px;
  --container-narrow: 860px;
}

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

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

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

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-mute);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-primary);
  font-weight: 600;
}

p {
  margin: 0;
}

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

dl,
dt,
dd {
  margin: 0;
}

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

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

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

th,
td {
  text-align: left;
  vertical-align: top;
}

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

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  flex: 0 0 auto;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
  letter-spacing: 0;
}

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

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--color-text-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
  background-color: var(--color-bg);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-accent);
}

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

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

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main {
  padding-bottom: 8px;
}

.inner-main {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 14px;
  color: var(--color-text-mute);
}

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

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

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

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

.page-header {
  padding: 12px 0 28px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
}

.page-description {
  max-width: 760px;
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  margin-top: 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

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

.footer-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
}

.footer-desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

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

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

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

.footer-list a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-soft);
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-bottom {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 32px;
}

.footer-boundary {
  padding: 16px 0;
  border-top: 1px solid var(--color-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-mute);
}

.footer-copy {
  font-size: 13px;
  color: var(--color-text-mute);
}

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */
.section-head {
  margin-bottom: 12px;
}

.section-title {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-primary);
}

.section-note {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-mute);
}

.section-intro {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.section-foot {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
  font-size: 15px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.text-link::after {
  content: "→";
  font-size: 13px;
  color: var(--color-accent);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-small);
  border: 1px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

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

/* 通用图片容器约束 */
.hero-media,
.content-media,
.channel-figure,
.media-figure,
.field-figure,
.step-figure {
  overflow: hidden;
  border-radius: var(--radius-card);
  background-color: #eceff3;
}

.hero-media img,
.content-media img,
.channel-figure img,
.media-figure img,
.field-figure img,
.step-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.hero {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(360px, 1.05fr);
  gap: 40px;
  align-items: center;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 48px 24px 36px;
}

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

.hero-kicker {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(201, 79, 79, 0.08);
  border-radius: var(--radius-small);
}

.hero-title {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
}

.hero-lead {
  margin-top: 16px;
  max-width: 520px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

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

.hero-media {
  margin: 0;
}

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

.hero-media figcaption {
  padding: 10px 2px 0;
}

.content-media {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 42px;
  border-radius: 0;
  background-color: transparent;
  overflow: visible;
}

.content-media-primary {
  padding-top: 32px;
}

.content-media img {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-card);
}

.content-media figcaption {
  padding: 10px 2px 0;
}

.channels-overview,
.collections-overview,
.fields-summary,
.path-steps,
.scope-feedback {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 44px 24px 0;
}

.scope-feedback {
  padding-bottom: 20px;
}

/* 频道条目行 */
.channel-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
}

.channel-row {
  display: grid;
  grid-template-columns: 48px minmax(220px, 1.2fr) minmax(240px, 1.4fr);
  gap: 20px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.channel-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.75;
}

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

.channel-name {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.channel-genre {
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

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

.channel-audience {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

.channel-filter {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-mute);
}

.channel-meta .text-link {
  margin-top: 10px;
}

/* 首页片单三列 */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
}

.collection-name {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.collection-scope {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
}

.collection-genre {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-mute);
}

.collection-card .text-link {
  margin-top: auto;
  padding-top: 16px;
  align-self: flex-start;
}

/* 首页字段摘要表 */
.field-table,
.compare-table,
.data-table {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line-strong);
  border-bottom: 1px solid var(--color-line-strong);
}

.field-table th,
.field-table td,
.compare-table th,
.compare-table td,
.data-table th,
.data-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--color-line);
  line-height: 1.7;
}

.field-table thead th,
.compare-table thead th,
.data-table thead th {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: #eef1f5;
  border-bottom: 1px solid var(--color-line-strong);
}

.field-table tbody th,
.compare-table tbody th,
.data-table tbody th {
  width: 26%;
  font-weight: 600;
  color: var(--color-primary);
}

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

.field-table tbody td,
.compare-table tbody td,
.data-table tbody td {
  color: var(--color-text-soft);
}

/* 编号步骤清单（首页） */
.path-steps .step-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
}

.path-steps .step-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.path-steps .step-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.75;
}

.path-steps .step-name {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.path-steps .step-desc {
  margin-top: 4px;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

/* 收录范围与反馈 */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.scope-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-card);
}

.scope-subtitle {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.scope-col p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

/* --------------------------------------------------------------------------
   pages · 内页通用
   -------------------------------------------------------------------------- */
.inner-main > section {
  margin-bottom: 44px;
}

.inner-main > section:last-child {
  margin-bottom: 0;
}

/* 频道分类页 */
.channel-list {
  margin-bottom: 44px;
}

.channel-list > .section-note {
  margin-bottom: 22px;
}

.channel-list .channel-row {
  display: grid;
  grid-template-columns: minmax(280px, 1.15fr) minmax(280px, 1fr);
  gap: 28px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.channel-list .channel-row + .channel-row {
  border-top: 0;
}

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

.channel-row-main .channel-name {
  font-size: 20px;
}

.channel-figure {
  margin-top: 14px;
}

.channel-figure img {
  aspect-ratio: 16 / 9;
}

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

.channel-filters {
  margin-top: 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: 14px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.channel-filters dt {
  font-size: 14px;
  color: var(--color-text-mute);
}

.channel-filters dd {
  font-size: 14px;
  color: var(--color-text);
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.channel-link::after {
  content: "→";
  font-size: 13px;
  color: var(--color-accent);
}

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

.compare-tip {
  margin-top: 18px;
  font-size: 15px;
}

.compare-tip a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.compare-tip a:hover,
.compare-tip a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* 相关入口带 */
.related-band,
.related-entry,
.collection-next {
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.related-band .section-title,
.related-entry .section-title,
.collection-next .section-title {
  font-size: 20px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px 20px;
  margin-top: 18px;
}

.related-list a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
}

.related-list a:hover,
.related-list a:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: #ffffff;
}

/* 专题片单页 */
.collection-list > .section-note {
  margin-bottom: 22px;
}

.collection-item {
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(320px, 1.15fr);
  gap: 28px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.collection-item + .collection-item {
  border-top: 0;
}

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

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

.media-caption {
  padding-top: 8px;
}

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

.collection-body .collection-name {
  font-size: 20px;
}

.collection-body .collection-scope {
  margin-top: 10px;
}

.collection-theme {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.collection-channel {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-text-mute);
}

.collection-channel a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.collection-channel a:hover,
.collection-channel a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.collection-enter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.collection-enter::after {
  content: "→";
  font-size: 13px;
  color: var(--color-accent);
}

.collection-enter:hover,
.collection-enter:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.table-caption {
  caption-side: top;
  padding: 0 0 12px;
  font-size: 14px;
  text-align: left;
  color: var(--color-text-mute);
}

.collection-next-text {
  margin-top: 14px;
  max-width: 760px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px 20px;
  margin-top: 18px;
}

.entry-item a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
}

.entry-item a:hover,
.entry-item a:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: #ffffff;
}

/* 条目字段说明页 */
.field-figure {
  margin-bottom: 28px;
}

.field-figure img {
  aspect-ratio: 21 / 9;
}

.figure-caption {
  padding-top: 10px;
}

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

.field-item:first-of-type {
  border-top: 1px solid var(--color-line);
}

.field-name {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.field-desc {
  margin-top: 6px;
  max-width: 820px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

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

.value-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.value-name {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.value-desc {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

/* 观看路径指引页 */
.guide-steps,
.path-steps.guide-path {
  margin-bottom: 44px;
}

.guide-path .step-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
}

.guide-path .step-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.guide-path .step-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.75;
}

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

.guide-path .step-name {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-primary);
}

.guide-path .step-desc {
  margin-top: 4px;
  max-width: 760px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.step-action {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-mute);
}

.step-figure {
  margin-top: 24px;
}

.step-figure img {
  aspect-ratio: 21 / 9;
}

.scope-body {
  margin-top: 6px;
}

.scope-text {
  max-width: 800px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.scope-list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scope-item {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
}

.scope-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

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

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

.faq-question {
  position: relative;
  padding: 16px 40px 16px 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
}

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

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

.faq-answer {
  padding: 0 40px 18px 0;
}

.faq-answer p {
  max-width: 800px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.faq-answer a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.faq-answer a:hover,
.faq-answer a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* 相关入口（字段说明 / 观看路径） */
.related-entry .related-list {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

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

.related-item a {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
}

.related-item a:hover,
.related-item a:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: #ffffff;
}

.related-desc {
  display: block;
  margin-top: 6px;
  padding-left: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-mute);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.error-panel {
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-line);
}

.error-inner {
  max-width: 620px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.error-inner h1 {
  margin-top: 10px;
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
}

.error-lead {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

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

.error-links {
  padding-top: 32px;
}

.error-links h2 {
  font-size: 22px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-primary);
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px 20px;
  margin-top: 18px;
}

.error-link-list a {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
}

.error-link-list a:hover,
.error-link-list a:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 36px;
  }

  .hero-media {
    order: -1;
  }

  .channel-rows .channel-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 8px 16px;
  }

  .channel-rows .channel-meta {
    grid-column: 2 / 3;
  }

  .collection-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

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

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

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex-basis: 100%;
    justify-content: stretch;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 10px;
    border-top: 1px solid var(--color-line);
  }

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

  .nav-link {
    justify-content: flex-start;
    width: 100%;
    padding: 0 4px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

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

  .inner-main {
    padding: 0 16px 44px;
  }

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding-bottom: 22px;
    margin-bottom: 26px;
  }

  .page-title,
  .hero-title,
  .error-inner h1 {
    font-size: 25px;
  }

  .section-title {
    font-size: 21px;
  }

  .hero-inner {
    padding: 28px 16px 26px;
  }

  .hero-lead {
    margin-top: 12px;
  }

  .hero-actions {
    margin-top: 20px;
  }

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

  .content-media {
    padding: 0 16px 32px;
  }

  .content-media-primary {
    padding-top: 24px;
  }

  .channels-overview,
  .collections-overview,
  .fields-summary,
  .path-steps,
  .scope-feedback {
    padding: 34px 16px 0;
  }

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

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

  .field-table,
  .compare-table,
  .data-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: normal;
  }

  .field-table thead th,
  .field-table tbody th,
  .field-table tbody td,
  .compare-table thead th,
  .compare-table tbody th,
  .compare-table tbody td,
  .data-table thead th,
  .data-table tbody td {
    min-width: 120px;
  }

  .field-table tbody th,
  .compare-table tbody th {
    min-width: 96px;
  }

  .path-steps .step-item,
  .guide-path .step-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
  }

  .channel-filters {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    padding: 12px 14px;
  }

  .channel-filters dt {
    margin-top: 8px;
  }

  .channel-filters dt:first-of-type {
    margin-top: 0;
  }

  .related-band,
  .related-entry,
  .collection-next {
    padding: 18px 16px;
  }

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

  .faq-question {
    padding-right: 34px;
    font-size: 16px;
  }

  .faq-answer {
    padding-right: 0;
  }

  .error-main {
    padding: 36px 16px 48px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 32px 16px 22px;
  }

  .footer-bottom {
    padding: 0 16px 26px;
  }
}

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