/* ==========================================================================
   被窝电影网 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1f6f5c;
  --color-primary-dark: #175646;
  --color-primary-soft: #d9ece6;
  --color-ink: #1c2b28;
  --color-ink-soft: #5c6b67;
  --color-line: #dfe6e3;
  --color-accent: #c45a2c;
  --color-surface: #ffffff;
  --color-surface-alt: #f5f8f7;
  --color-surface-warm: #fbf6f2;

  --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", Consolas, "Liberation Mono", Menlo, "Courier New", monospace;

  --container: 1120px;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(28, 43, 40, 0.06);
  --shadow-hover: 0 6px 16px rgba(28, 43, 40, 0.1);
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-ink);
  background-color: var(--color-surface);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
}

p {
  margin: 0;
}

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

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

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

a:hover {
  color: var(--color-primary-dark);
}

button {
  font: inherit;
  color: inherit;
}

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

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

/* --------------------------------------------------------------------------
   layout · 全站骨架（页头 / 导航 / 主容器 / 页脚）
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-ink);
}

.brand-logo:hover {
  color: var(--color-primary);
}

.brand-name {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0;
}

.brand-tag {
  font-size: 12px;
  color: var(--color-ink-soft);
  padding-left: 10px;
  border-left: 1px solid var(--color-line);
}

.site-nav {
  margin-left: auto;
}

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

.nav-item {
  flex-shrink: 0;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
}

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

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

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-ink);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.home-main {
  padding-bottom: 56px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-ink-soft);
  padding: 4px 0 14px;
}

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

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

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

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

/* 内页标题区 */
.page-header {
  padding: 8px 0 28px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.page-description {
  font-size: 15px;
  color: var(--color-ink-soft);
  max-width: 760px;
}

/* 全站页脚 */
.site-footer {
  background-color: var(--color-surface-alt);
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-soft);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 32px;
}

.footer-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.7;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 12px;
}

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

.footer-list a {
  font-size: 13px;
  color: var(--color-ink-soft);
}

.footer-list a:hover {
  color: var(--color-primary);
}

.footer-note p {
  font-size: 13px;
  line-height: 1.7;
}

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px 22px;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

.footer-status,
.footer-copy {
  font-size: 12px;
  color: var(--color-ink-soft);
}

/* --------------------------------------------------------------------------
   components · 通用区块、按钮、表格、链接、卡片
   -------------------------------------------------------------------------- */
.section {
  margin-bottom: 48px;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.section-desc,
.section-text {
  font-size: 14px;
  color: var(--color-ink-soft);
  max-width: 780px;
}

.section-text + .section-text {
  margin-top: 10px;
}

.section-more {
  margin-top: 18px;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary-soft);
  padding-bottom: 1px;
}

.text-link::after {
  content: " →";
  font-weight: 400;
}

.text-link:hover {
  border-bottom-color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

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

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

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

.btn-ghost:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

/* 表格：字段说明 / 数据表 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.field-table,
.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 14px;
}

.field-table caption,
.data-table caption,
.table-caption,
.field-table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-ink-soft);
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-line);
}

.field-table th,
.field-table td,
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.field-table thead th,
.data-table thead th {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  background-color: var(--color-primary-soft);
  white-space: nowrap;
}

.field-table tbody th,
.data-table tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-dark);
  white-space: nowrap;
  background-color: var(--color-surface-alt);
}

.field-table tbody tr:nth-child(even) td,
.data-table tbody tr:nth-child(even) td {
  background-color: #fafcfb;
}

.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 {
  border-bottom: 0;
}

/* 图片容器统一约束 */
.hero-figure,
.collection-figure,
.collection-media,
.layer-figure,
.route-figure,
.scope-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.hero-figure img,
.collection-figure img,
.collection-media img,
.layer-figure img,
.route-figure img,
.scope-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure figcaption,
.collection-figure figcaption,
.layer-figure figcaption,
.route-figure figcaption,
.scope-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-ink-soft);
  background-color: var(--color-surface-alt);
  border-top: 1px solid var(--color-line);
}

/* 双栏布局：默认主内容在前，aside 在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

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

.layout-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* 侧栏在前的布局：.sidebar-left 位于布局容器自身 */
.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

/* 侧栏在前的布局：.sidebar-left 位于祖先节点 */
.sidebar-left .page-layout {
  grid-template-columns: 260px minmax(0, 1fr);
}

.aside-block {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  background-color: var(--color-surface);
}

.aside-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.aside-text {
  font-size: 13px;
  color: var(--color-ink-soft);
}

.aside-text + .aside-text {
  margin-top: 8px;
}

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

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

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

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
  padding-left: 10px;
  border-left: 3px solid var(--color-accent);
  line-height: 1.4;
}

.hero-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 14px;
}

.hero-text {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 24px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-figure {
  height: 300px;
  border: 1px solid var(--color-line);
}

.hero-figure figcaption {
  height: auto;
}

/* 题材分类总览 */
.topics-overview {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.topic-rows {
  border-top: 1px solid var(--color-line);
}

.topic-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: 20px;
  align-items: baseline;
  padding: 16px 4px;
  border-bottom: 1px solid var(--color-line);
  transition: background-color 0.18s ease;
}

.topic-row:hover {
  background-color: var(--color-surface-alt);
}

.topic-row-main {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
}

.topic-name {
  font-size: 16px;
  font-weight: 600;
  flex-shrink: 0;
}

.topic-name a {
  color: var(--color-ink);
}

.topic-name a:hover {
  color: var(--color-primary);
}

.topic-scope {
  font-size: 14px;
  color: var(--color-ink-soft);
  min-width: 220px;
  flex: 1 1 240px;
}

.topic-meta {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--color-primary-dark);
  text-align: right;
}

/* 专题片单速览 */
.collections-preview {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.collections-preview .collection-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.collections-preview .collection-item {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.collections-preview .collection-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.collections-preview .collection-figure {
  height: 160px;
  border-radius: 0;
}

.collections-preview .collection-figure figcaption {
  display: none;
}

.collections-preview .collection-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.collections-preview .collection-name {
  font-size: 16px;
  font-weight: 600;
}

.collections-preview .collection-name a {
  color: var(--color-ink);
}

.collections-preview .collection-name a:hover {
  color: var(--color-primary);
}

.collections-preview .collection-scope {
  font-size: 13px;
  color: var(--color-primary-dark);
  font-family: var(--font-mono);
}

.collections-preview .collection-note {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* 字段说明区 */
.field-table-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 0;
}

/* 查阅路径要点 */
.guide-steps {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.guide-steps .step-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.guide-steps .step-item {
  display: flex;
  gap: 14px;
  padding: 18px 18px 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

.guide-steps .step-index {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--color-surface-warm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.guide-steps .step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.guide-steps .step-text {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* 收录范围与反馈入口 */
.scope-entry {
  max-width: var(--container);
  margin: 48px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 28px;
}

.scope-summary {
  min-width: 0;
}

.scope-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scope-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-primary);
}

.feedback-block {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  background-color: var(--color-surface-warm);
}

.feedback-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feedback-text {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 16px;
}

/* --------------------------------------------------------------------------
   pages · 题材分类（topics）
   -------------------------------------------------------------------------- */
.section-layer .layer-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  margin-bottom: 24px;
}

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

.layer-text p {
  font-size: 15px;
  color: var(--color-ink-soft);
}

.layer-text p + p {
  margin-top: 12px;
}

.layer-figure {
  height: 220px;
  border: 1px solid var(--color-line);
}

.layer-fields {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
}

.layer-field {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.layer-field dt {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.layer-field dd {
  margin: 0;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.category-index {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px;
  background-color: var(--color-surface);
}

.index-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.index-item a {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}

.index-item a:hover {
  background-color: var(--color-surface-alt);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
}

.index-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--color-line);
  font-size: 13px;
  color: var(--color-ink-soft);
}

.topic-groups {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.topic-group {
  padding: 20px 22px 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  transition: box-shadow 0.18s ease;
}

.topic-group:hover {
  box-shadow: var(--shadow-hover);
}

.group-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  padding-left: 10px;
  border-left: 3px solid var(--color-primary);
}

.group-scope {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 14px;
}

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

.group-field {
  min-width: 0;
  padding: 12px 14px;
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-sm);
}

.group-field dt {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.group-field dd {
  margin: 0;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.group-more {
  margin-top: 14px;
}

.group-more a {
  font-size: 14px;
  font-weight: 600;
}

.section-bridge .bridge-body {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.bridge-body p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.bridge-body p + p {
  margin-top: 10px;
}

.bridge-links {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.bridge-links li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-primary);
}

.bridge-links li a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

/* --------------------------------------------------------------------------
   pages · 专题片单（collections）
   -------------------------------------------------------------------------- */
.collections-intro .rule-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.rule-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.rule-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.collection-list .collection-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
  margin-top: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.collection-list .collection-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.collection-list .collection-card:first-of-type {
  margin-top: 22px;
}

.collection-media {
  height: 150px;
  border: 1px solid var(--color-line);
}

.collection-list .collection-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.collection-list .collection-name {
  font-size: 18px;
  font-weight: 600;
}

.collection-list .collection-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.collection-list .collection-scope {
  font-size: 13px;
  color: var(--color-primary-dark);
  font-family: var(--font-mono);
}

.collection-list .collection-related {
  font-size: 13px;
  color: var(--color-ink-soft);
  padding-top: 8px;
  border-top: 1px dashed var(--color-line);
}

.scope-summary .data-table {
  margin-top: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.related-topics .topic-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-link-item a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--color-ink);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
}

.topic-link-item a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

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

.aside-link-list a {
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 查阅路径（guide）
   -------------------------------------------------------------------------- */
.page-guide .route-overview,
.page-guide .step-list,
.page-guide .entry-advice,
.page-guide .faq {
  margin-bottom: 48px;
}

.route-figure {
  height: 260px;
  margin-bottom: 20px;
  border: 1px solid var(--color-line);
}

.route-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.route-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 16px;
  font-size: 14px;
  color: var(--color-primary);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
}

.route-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  counter-reset: guide-step;
}

.steps .step-item {
  position: relative;
  padding: 20px 22px 22px 62px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

.steps .step-item::before {
  counter-increment: guide-step;
  content: counter(guide-step, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-accent);
}

.steps .step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.steps .step-text {
  font-size: 14px;
  color: var(--color-ink-soft);
}

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

.advice-item {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.advice-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.advice-text {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  cursor: pointer;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-primary);
}

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

.faq-item[open] .faq-question {
  color: var(--color-primary-dark);
  background-color: var(--color-surface-alt);
}

.faq-answer {
  padding: 14px 20px 18px;
  font-size: 14px;
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-line);
}

/* --------------------------------------------------------------------------
   pages · 收录范围（scope）
   -------------------------------------------------------------------------- */
.page-scope .scope-standard,
.page-scope .boundary-list,
.page-scope .scope-explain,
.page-scope .feedback-path {
  margin-bottom: 48px;
}

.scope-figure {
  height: 230px;
  margin-bottom: 22px;
  border: 1px solid var(--color-line);
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.boundary-col {
  padding: 20px 22px 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

.boundary-col-in {
  border-top: 3px solid var(--color-primary);
}

.boundary-col-out {
  border-top: 3px solid var(--color-accent);
  background-color: var(--color-surface-warm);
}

.boundary-heading {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
}

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

.boundary-item {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.boundary-col-in .boundary-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.boundary-col-out .boundary-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.scope-note-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  counter-reset: scope-note;
}

.scope-note {
  padding: 18px 20px 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.scope-note-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scope-note p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.feedback-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.feedback-step {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

.feedback-step-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
}

.feedback-step p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.scope-aside {
  padding: 20px 22px 22px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.scope-aside-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.scope-aside-desc {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.scope-aside-list {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.scope-aside-list li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-primary);
}

.scope-aside-list li a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.error-panel {
  max-width: 640px;
  padding: 32px 32px 34px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  background-color: var(--color-surface-alt);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.error-title {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 24px;
}

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

.error-hint {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--color-line);
}

.error-hint-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 14px;
}

.error-hint-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-hint-item a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 16px;
  font-size: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-primary);
}

.error-hint-item a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

/* --------------------------------------------------------------------------
   responsive · 平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
  }

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

  .category-index {
    order: 2;
  }

  .topic-groups {
    order: 1;
  }

  .collections-preview .collection-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px 16px;
    min-height: 60px;
  }

  .brand-tag {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex-basis: 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 12px;
    border-top: 1px solid var(--color-line);
    max-height: 60vh;
    overflow-y: auto;
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: var(--radius-sm);
  }

  .nav-link.is-current {
    border-left-color: var(--color-primary);
    background-color: var(--color-surface-alt);
  }

  .inner-main {
    padding: 16px 16px 48px;
  }

  .breadcrumb {
    padding-bottom: 10px;
  }

  .page-header {
    padding-bottom: 20px;
    margin-bottom: 24px;
  }

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

  .section-title,
  .error-hint-title {
    font-size: 19px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 28px 16px 32px;
    gap: 24px;
  }

  .hero-figure {
    height: 200px;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .topics-overview,
  .collections-preview,
  .field-table-section,
  .guide-steps {
    padding: 32px 16px 0;
  }

  .scope-entry {
    margin-top: 32px;
    padding: 0 16px;
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .topic-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .topic-meta {
    text-align: left;
  }

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

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

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

  .layer-figure {
    height: 180px;
  }

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

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

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

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

  .collection-media {
    height: 180px;
  }

  .route-figure {
    height: 190px;
  }

  .advice-list,
  .scope-note-list,
  .feedback-steps,
  .boundary-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 22px;
  }

  .footer-bottom {
    padding: 14px 16px 20px;
    flex-direction: column;
  }

  .error-main {
    padding: 40px 16px 56px;
  }

  .error-panel {
    padding: 24px 20px 26px;
  }

  .error-actions .btn {
    flex: 1 1 100%;
  }
}

@media (max-width: 480px) {
  .hero-title,
  .page-title,
  .error-title {
    font-size: 22px;
  }

  .section-title {
    font-size: 18px;
  }

  .topic-scope {
    min-width: 0;
    flex-basis: 100%;
  }

  .steps .step-item {
    padding: 18px 18px 20px 54px;
  }

  .steps .step-item::before {
    left: 16px;
    top: 18px;
  }

  .error-hint-list {
    flex-direction: column;
  }

  .error-hint-item a {
    width: 100%;
    justify-content: center;
  }
}