/* ==========================================================================
   樱花视频 · qiyila.cn
   通用视频内容导航站 — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #F7F5F0;
  --bg-raised: #FFFFFF;
  --bg-sunken: #EFEBE3;
  --ink: #2B2B2B;
  --ink-soft: #5A5A55;
  --ink-faint: #7C7A73;
  --green: #1F4A3D;
  --green-deep: #163629;
  --green-tint: #E4EDE7;
  --orange: #C8703A;
  --orange-tint: #F6E7DC;
  --line: #DED9CF;
  --line-strong: #C7C0B3;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-soft: 0 1px 2px rgba(43, 43, 43, 0.04);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
  --wrap: 1120px;
  --wrap-read: 760px;
  --gap-lg: 48px;
  --gap-md: 28px;
  --gap-sm: 16px;
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-page);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--green-deep);
  font-weight: 600;
  line-height: 1.4;
}

h1 {
  font-size: 32px;
  line-height: 1.35;
}

h2 {
  font-size: 24px;
  line-height: 1.4;
}

h3 {
  font-size: 18px;
  line-height: 1.5;
}

p {
  margin: 0 0 12px;
}

p:last-child {
  margin-bottom: 0;
}

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

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

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

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

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

figure {
  margin: 0;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

strong {
  font-weight: 600;
  color: var(--green-deep);
}

/* --------------------------------------------------------------------------
   layout · 全站骨架：页头 / 主导航 / 主内容 / 页脚
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 245, 240, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-md);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--green-deep);
  flex: 0 0 auto;
}

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

.brand-mark {
  display: block;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: var(--green);
  border: 2px solid var(--green);
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 5px 6px;
  border-radius: 1px;
  background-color: var(--orange);
}

.brand-text {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: inherit;
}

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

.nav-toggle:hover {
  border-color: var(--green);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--green-deep);
  border-radius: 1px;
}

.site-nav {
  flex: 0 1 auto;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--ink);
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

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

.nav-link.is-current {
  color: var(--green-deep);
  font-weight: 600;
  border-bottom-color: var(--orange);
}

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

.inner-main {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.home-main {
  width: 100%;
}

.site-footer {
  background-color: var(--green-deep);
  color: #E6E2D8;
  font-size: 14px;
  line-height: 1.7;
  margin-top: auto;
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 24px;
  display: grid;
  grid-template-columns: minmax(240px, 1.1fr) minmax(0, 2fr);
  gap: var(--gap-lg) var(--gap-md);
}

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

.footer-brand-name {
  display: block;
  font-size: 18px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.footer-desc {
  margin: 0;
  color: #C9C4B7;
  max-width: 34em;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md) var(--gap-sm);
  min-width: 0;
}

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

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(230, 226, 216, 0.22);
}

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

.footer-list a {
  color: #C9C4B7;
  display: inline-block;
  padding: 2px 0;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: #FFFFFF;
}

.footer-bottom {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid rgba(230, 226, 216, 0.22);
  color: #A9A498;
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   layout · 内页通用：面包屑 / 页面标题区 / 相关入口
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

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

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

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

.breadcrumb-current {
  color: var(--green-deep);
  font-weight: 600;
}

.page-header {
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  line-height: 1.35;
  font-weight: 600;
  color: var(--green-deep);
  margin: 0 0 12px;
}

.page-description {
  max-width: var(--wrap-read);
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0;
}

.page-meta {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

.page-meta a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.page-meta a:hover,
.page-meta a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.related-links {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.related-links .section-title {
  margin-bottom: 16px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.related-list li,
.related-item {
  min-width: 0;
}

.related-list a,
.related-item a {
  display: inline-block;
  padding: 9px 14px;
  font-size: 15px;
  color: var(--green-deep);
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-list a:hover,
.related-list a:focus-visible,
.related-item a:hover,
.related-item a:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
  background-color: var(--orange-tint);
}

/* --------------------------------------------------------------------------
   components · 通用按钮 / 链接 / 区块标题 / 表格 / 图片
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--green);
  color: #FFFFFF;
  border-color: var(--green);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--green-deep);
  border-color: var(--green-deep);
  color: #FFFFFF;
}

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

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

.link-more {
  display: inline-block;
  font-size: 15px;
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

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

.section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.section-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.section-head {
  margin-bottom: 28px;
}

.section-title,
.section-head h2,
.channel-table-section h2,
.choice-advice-section h2,
.channel-relation-section h2,
.field-dictionary h2,
.boundary-notes h2,
.misunderstandings h2,
.path-steps h2,
.field-checks h2,
.confirm-route h2,
.updates-log h2,
.feedback-route h2,
.handling-notes h2 {
  font-size: 24px;
  line-height: 1.4;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.section-lead,
.section-desc,
.section-intro,
.section-lede {
  max-width: var(--wrap-read);
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0;
}

.section-more {
  margin: 24px 0 0;
}

.section-note {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

.section-note a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.section-note a:hover,
.section-note a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-raised);
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 14px 18px 0;
  font-size: 14px;
  color: var(--ink-faint);
}

.field-table,
.data-table,
.channel-table {
  width: 100%;
  min-width: 620px;
  font-size: 15px;
  line-height: 1.7;
}

.field-table th,
.field-table td,
.data-table th,
.data-table td,
.channel-table th,
.channel-table td {
  padding: 13px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.field-table thead th,
.data-table thead th,
.channel-table thead th {
  background-color: var(--bg-sunken);
  color: var(--green-deep);
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

.field-table tbody th,
.data-table tbody th,
.channel-table tbody th {
  color: var(--green-deep);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 14px;
  white-space: nowrap;
  background-color: rgba(239, 235, 227, 0.5);
}

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

.field-table tbody tr:hover,
.data-table tbody tr:hover,
.channel-table tbody tr:hover {
  background-color: var(--green-tint);
}

.content-media,
.hero-figure,
.channel-figure,
.field-figure,
.special-card-media,
.check-figure,
.handling-figure {
  margin: 0;
  background-color: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.content-media img,
.hero-figure img,
.channel-figure img,
.field-figure img,
.special-card-media img,
.check-figure img,
.handling-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background-color: var(--bg-sunken);
}

.content-media figcaption,
.hero-figure figcaption,
.channel-figure figcaption,
.field-figure figcaption,
.special-card-media figcaption,
.check-figure figcaption,
.handling-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-faint);
  background-color: var(--bg-raised);
  border-top: 1px solid var(--line);
}

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

/* 首屏 */
.hero {
  padding: 52px 0 48px;
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--gap-lg);
  align-items: start;
}

.hero-copy {
  min-width: 0;
  padding-top: 6px;
}

.hero-eyebrow {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--orange);
  font-weight: 600;
}

.hero-title {
  font-size: 32px;
  line-height: 1.35;
  color: var(--green-deep);
  margin: 0 0 16px;
  max-width: 20em;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0 0 20px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
}

.hero-tag {
  display: inline-block;
  padding: 7px 13px;
  font-size: 14px;
  color: var(--green-deep);
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.hero-tag:hover,
.hero-tag:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
  background-color: var(--orange-tint);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.hero-figure {
  aspect-ratio: 4 / 3;
  min-width: 0;
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media-primary {
  width: 100%;
  max-width: var(--wrap);
  margin: 40px auto 0;
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
}

.content-media-primary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 站点定位与内容组织说明 */
.section-about {
  border-top: 0;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.about-card {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.about-card h3 {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.about-card p {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0;
}

/* 频道方向总览 */
.channel-list {
  border-top: 1px solid var(--line-strong);
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.9fr) minmax(0, 1.5fr) minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--gap-sm) var(--gap-md);
  align-items: start;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}

.channel-row:hover {
  background-color: rgba(228, 237, 231, 0.5);
}

.channel-name {
  font-size: 18px;
  margin: 0;
  min-width: 0;
}

.channel-name a {
  color: var(--green-deep);
}

.channel-name a:hover,
.channel-name a:focus-visible {
  color: var(--orange);
}

.channel-orient,
.channel-scope,
.channel-use {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

.channel-orient::before,
.channel-scope::before,
.channel-use::before {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.channel-orient::before {
  content: "内容取向";
}

.channel-scope::before {
  content: "收录范围";
}

.channel-use::before {
  content: "适用场景";
}

/* 本期专题片单速览 */
.special-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.special-card {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.special-card:hover {
  border-color: var(--green);
}

.special-name {
  font-size: 18px;
  margin: 0;
}

.special-name a {
  color: var(--green-deep);
}

.special-name a:hover,
.special-name a:focus-visible {
  color: var(--orange);
}

.special-scope,
.special-organize {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.special-scope::before,
.special-organize::before {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.special-scope::before {
  content: "主题范围";
}

.special-organize::before {
  content: "条目组织方式";
}

/* 条目字段与收录边界摘要 */
.section-fields .field-table {
  min-width: 640px;
}

/* 查阅路径三步概览 */
.path-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  counter-reset: home-step;
}

.path-step {
  min-width: 0;
  padding: 22px 20px 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: relative;
}

.path-step::before {
  counter-increment: home-step;
  content: counter(home-step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.path-step .step-name {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 8px;
}

.path-step p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* 收录范围调整记录 */
.update-list {
  border-top: 1px solid var(--line-strong);
}

.update-item {
  display: grid;
  grid-template-columns: 120px minmax(140px, 0.8fr) minmax(0, 2fr);
  gap: var(--gap-sm) var(--gap-md);
  align-items: baseline;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}

.update-date {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-faint);
}

.update-target {
  font-size: 15px;
  font-weight: 600;
  color: var(--green-deep);
}

.update-note {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

/* --------------------------------------------------------------------------
   pages · 题材频道
   -------------------------------------------------------------------------- */
.channel-table-section,
.choice-advice-section,
.channel-relation-section {
  margin-bottom: 48px;
}

.channel-table-section h2,
.choice-advice-section h2,
.channel-relation-section h2 {
  margin-bottom: 10px;
}

.channel-figure {
  margin: 22px 0 24px;
  aspect-ratio: 21 / 8;
}

.channel-table {
  min-width: 700px;
}

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

.advice-col {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advice-col h3 {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.advice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.advice-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

.advice-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--orange);
}

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

.relation-points li {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--ink-soft);
}

.relation-points strong {
  display: block;
  margin-bottom: 6px;
  color: var(--green-deep);
}

.related-links-section {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.related-links-section h2 {
  font-size: 24px;
  margin: 0 0 16px;
}

/* --------------------------------------------------------------------------
   pages · 专题片单
   -------------------------------------------------------------------------- */
.special-list {
  border-top: 0;
  padding-top: 0;
}

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

.special-list .special-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
  padding: 26px 24px;
  margin-bottom: 24px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.special-list .special-card:last-of-type {
  margin-bottom: 0;
}

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

.special-card-title {
  font-size: 20px;
  color: var(--green-deep);
  margin: 0 0 12px;
}

.special-card-scope {
  margin: 0 0 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

.special-card-scope .label {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--green-deep);
  background-color: var(--green-tint);
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}

.special-facts {
  display: grid;
  grid-template-columns: minmax(110px, auto) minmax(0, 1fr);
  gap: 8px var(--gap-sm);
  margin: 0;
  font-size: 15px;
}

.special-facts dt {
  color: var(--ink-faint);
  font-size: 14px;
}

.special-facts dd {
  margin: 0;
  color: var(--ink-soft);
  min-width: 0;
}

.special-card-media {
  aspect-ratio: 16 / 10;
  min-width: 0;
}

.special-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.selection-advice {
  padding-top: 48px;
}

.selection-advice .advice-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 22px;
}

.advice-item {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
}

.advice-title {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.advice-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.advice-text a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.advice-text a:hover,
.advice-text a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.special-relation {
  padding-top: 48px;
}

.relation-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 22px;
}

.relation-col {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.relation-col-title {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.relation-col-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 条目字段说明
   -------------------------------------------------------------------------- */
.field-visual {
  margin-bottom: 44px;
}

.field-figure {
  aspect-ratio: 21 / 8;
}

.field-dictionary,
.boundary-notes,
.misunderstandings {
  margin-bottom: 48px;
}

.field-dictionary h2,
.boundary-notes h2,
.misunderstandings h2 {
  margin-bottom: 10px;
}

.field-dictionary .section-lead,
.boundary-notes .section-lead,
.misunderstandings .section-lead {
  margin-bottom: 22px;
}

.data-table {
  min-width: 640px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.boundary-col {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-col h3 {
  font-size: 18px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.boundary-col-in h3 {
  color: var(--green-deep);
}

.boundary-col-out h3 {
  color: var(--orange);
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

.boundary-list li::before {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 14px;
}

.boundary-col-in .boundary-list li::before {
  content: "＋";
  color: var(--green);
}

.boundary-col-out .boundary-list li::before {
  content: "－";
  color: var(--orange);
}

.misunderstanding-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.misunderstanding-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.misunderstanding-item h3 {
  font-size: 16px;
  color: var(--orange);
  margin: 0 0 8px;
}

.misunderstanding-item p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 查阅路径指引
   -------------------------------------------------------------------------- */
.path-steps {
  margin-bottom: 48px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  margin-top: 22px;
}

.step-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
  padding: 22px 24px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-index {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--green);
  border-radius: 50%;
}

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

.step-name {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 8px;
}

.step-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.step-text a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.step-text a:hover,
.step-text a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.step-footnote {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

.field-checks {
  margin-bottom: 48px;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 22px;
}

.check-card {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-card-title {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.check-card-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.check-figure {
  margin-top: 28px;
  aspect-ratio: 21 / 8;
}

.confirm-route {
  margin-bottom: 8px;
}

.route-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-top: 22px;
}

.route-column {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.route-column-title {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 10px;
}

.route-column-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.route-column-text a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.route-column-text a:hover,
.route-column-text a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.route-footnote {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

/* --------------------------------------------------------------------------
   pages · 收录范围与反馈
   -------------------------------------------------------------------------- */
.updates-log,
.feedback-route,
.handling-notes {
  margin-bottom: 48px;
}

.updates-log h2,
.feedback-route h2,
.handling-notes h2 {
  margin-bottom: 10px;
}

.updates-log .section-desc,
.feedback-route .section-desc,
.handling-notes .section-desc {
  margin-bottom: 22px;
}

.log-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--line-strong);
  margin-left: 6px;
  padding-left: 24px;
}

.log-item {
  position: relative;
  padding: 0 0 24px;
}

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

.log-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--orange);
  border: 2px solid var(--bg-page);
}

.log-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

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

.log-target {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 9px;
  font-size: 13px;
  font-weight: 600;
  color: var(--green-deep);
  background-color: var(--green-tint);
  border-radius: var(--radius-sm);
}

.log-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.route-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
  counter-reset: feedback-step;
}

.route-step {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: feedback-step;
}

.route-step::before {
  content: counter(feedback-step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.route-step-title {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 8px;
}

.route-step-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.route-step-text a {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.route-step-text a:hover,
.route-step-text a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.handling-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-md) var(--gap-lg);
  align-items: start;
}

.handling-notes h2 {
  grid-column: 1 / -1;
}

.handling-figure {
  grid-column: 1;
  aspect-ratio: 4 / 3;
}

.handling-body {
  grid-column: 2;
  min-width: 0;
}

.handling-text {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.handling-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.handling-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

.handling-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--green);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 64px 24px 80px;
}

.error-panel {
  width: 100%;
  max-width: 720px;
  padding: 40px 32px;
  background-color: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-panel h1 {
  font-size: 32px;
  line-height: 1.35;
  color: var(--green-deep);
  margin: 0 0 14px;
}

.error-lead {
  max-width: 46em;
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0 0 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 32px;
}

.error-hints {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.error-hints h2 {
  font-size: 18px;
  color: var(--green-deep);
  margin: 0 0 14px;
}

.error-hint-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.error-hint-list a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--green-deep);
  background-color: var(--bg-page);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-hint-list a:hover,
.error-hint-list a:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
  background-color: var(--orange-tint);
}

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

  .channel-row {
    grid-template-columns: minmax(130px, 0.9fr) minmax(0, 1.4fr) minmax(0, 1.1fr);
  }

  .channel-use {
    grid-column: 2 / -1;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-md);
  }

  .footer-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* --------------------------------------------------------------------------
   responsive · 768px
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  h1,
  .page-title,
  .hero-title,
  .error-panel h1 {
    font-size: 27px;
  }

  h2,
  .section-title,
  .section-head h2,
  .channel-table-section h2,
  .choice-advice-section h2,
  .channel-relation-section h2,
  .field-dictionary h2,
  .boundary-notes h2,
  .misunderstandings h2,
  .path-steps h2,
  .field-checks h2,
  .confirm-route h2,
  .updates-log h2,
  .feedback-route h2,
  .handling-notes h2,
  .related-links-section h2 {
    font-size: 21px;
  }

  .header-inner {
    padding: 12px 18px;
    gap: var(--gap-sm);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-page);
    border-bottom: 1px solid var(--line);
    padding: 8px 18px 14px;
    box-shadow: var(--shadow-soft);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    display: none;
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    min-height: 44px;
  }

  .nav-link.is-current {
    border-bottom-color: var(--line);
    border-left: 3px solid var(--orange);
    padding-left: 13px;
  }

  .inner-main {
    padding: 0 18px 56px;
  }

  .hero {
    padding: 36px 0 34px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-md);
    padding: 0 18px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-figure {
    order: 2;
    aspect-ratio: 16 / 10;
  }

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

  .content-media-primary {
    margin-top: 28px;
    aspect-ratio: 16 / 10;
  }

  .section {
    padding: 40px 0;
  }

  .section-inner {
    padding: 0 18px;
  }

  .about-grid,
  .special-grid,
  .path-steps,
  .advice-columns,
  .relation-points,
  .relation-columns,
  .boundary-columns,
  .misunderstanding-list,
  .check-grid,
  .route-columns,
  .route-steps,
  .selection-advice .advice-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 18px 2px;
  }

  .channel-use {
    grid-column: auto;
  }

  .update-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 2px;
  }

  .special-list .special-card {
    grid-template-columns: minmax(0, 1fr);
    padding: 22px 18px;
  }

  .special-card-media {
    aspect-ratio: 16 / 9;
  }

  .special-facts {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .special-facts dt {
    margin-top: 8px;
  }

  .step-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: var(--gap-sm);
    padding: 18px 18px;
  }

  .step-index {
    width: 38px;
    height: 38px;
    font-size: 15px;
  }

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

  .handling-figure,
  .handling-body {
    grid-column: auto;
  }

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

  .log-list {
    margin-left: 4px;
    padding-left: 18px;
  }

  .log-item::before {
    left: -25px;
  }

  .page-header {
    padding: 14px 0 24px;
    margin-bottom: 30px;
  }

  .related-links {
    margin-top: 40px;
  }

  .error-main {
    padding: 40px 18px 56px;
  }

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

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

  .footer-inner {
    padding: 34px 18px 20px;
  }

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

/* --------------------------------------------------------------------------
   responsive · 480px
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  h1,
  .page-title,
  .hero-title,
  .error-panel h1 {
    font-size: 23px;
  }

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

  .hero-eyebrow {
    font-size: 13px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    min-width: 140px;
  }

  .hero-tag {
    padding: 6px 11px;
    font-size: 13px;
  }

  .field-table,
  .data-table,
  .channel-table {
    min-width: 560px;
    font-size: 14px;
  }

  .field-table th,
  .field-table td,
  .data-table th,
  .data-table td,
  .channel-table th,
  .channel-table td {
    padding: 11px 13px;
  }

  .related-list a,
  .related-item a {
    padding: 10px 12px;
    font-size: 14px;
  }

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-sm);
  }

  .footer-bottom {
    font-size: 12px;
  }
}

/* --------------------------------------------------------------------------
   motion · 轻量滚动出现（仅增强，不影响初始可见）
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal-ready .about-card,
  .reveal-ready .special-card,
  .reveal-ready .path-step,
  .reveal-ready .update-item,
  .reveal-ready .check-card,
  .reveal-ready .route-step,
  .reveal-ready .log-item {
    animation: rise-in 0.45s ease-out both;
  }

  .reveal-ready .about-card:nth-child(2),
  .reveal-ready .special-card:nth-child(2),
  .reveal-ready .path-step:nth-child(2),
  .reveal-ready .check-card:nth-child(2),
  .reveal-ready .route-step:nth-child(2) {
    animation-delay: 0.06s;
  }

  .reveal-ready .about-card:nth-child(3),
  .reveal-ready .special-card:nth-child(3),
  .reveal-ready .path-step:nth-child(3),
  .reveal-ready .check-card:nth-child(3),
  .reveal-ready .route-step:nth-child(3) {
    animation-delay: 0.12s;
  }
}

@keyframes rise-in {
  from {
    transform: translateY(10px);
  }

  to {
    transform: translateY(0);
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}