/* ============================================================
   51黑料网 · 整站样式表
   高密度控制台风格
   ============================================================ */

/* ============================================================
   Base
   ============================================================ */

:root {
  --color-text: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-bg: #f1f5f9;
  --color-bg-white: #ffffff;
  --color-border: #e5e7eb;
  --color-border-dark: #cbd5e1;
  --color-success: #10b981;
  --color-warning: #eab308;
  --color-danger: #ef4444;
  --color-success-bg: #d1fae5;
  --color-warning-bg: #fef9c3;
  --color-danger-bg: #fee2e2;

  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-xs: 13px;
  --line-height-base: 1.7;
  --line-height-tight: 1.4;

  --container-width: 1280px;
  --container-padding: 24px;
  --sidebar-width: 280px;
  --main-content-width: 920px;

  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --transition-base: 0.2s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: 30px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

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

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

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

/* ============================================================
   Layout
   ============================================================ */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.site-main.inner-main {
  padding-bottom: 60px;
}

/* 统一容器 */
.header-inner,
.footer-inner,
.brand-position,
.service-matrix,
.scenes-preview,
.cooperation-steps,
.recent-records,
.help-entry,
.related-links,
.page-title-area,
.page-title-block,
.function-overview-block,
.function-list-section,
.function-detail-section,
.related-links-section,
.scene-panels,
.scene-function-matrix,
.step-list-section,
.config-example-section,
.faq-section,
.support-process-section,
.support-hero,
.page-layout {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0;
}

.brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

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

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

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

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

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

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

.toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.footer-brand p {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  margin-bottom: 0;
}

.footer-links h3 {
  font-size: var(--font-size-base);
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

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

.footer-info p {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.footer-info .copyright {
  margin-top: 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   Components
   ============================================================ */

/* --- 按钮 --- */

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base);
  min-height: 44px;
}

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

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

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-border-dark);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --- 面包屑 --- */

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px var(--container-padding) 0;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

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

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* --- 页面标题区 --- */

.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 8px;
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
}

.page-title-area,
.page-title-block {
  padding-top: 8px;
  padding-bottom: 16px;
}

.page-title-area p,
.page-title-block p,
.page-intro {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 820px;
  margin-bottom: 0;
}

.page-title-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 820px;
}

/* --- 区块标题 --- */

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

.section-header h2,
.section-heading h2,
.function-list-section h2,
.function-detail-section h2,
.scene-function-matrix h2,
.faq-section h2,
.support-process-section h2,
.related-links h2,
.related-links-section h2,
.version-timeline-section h2,
.version-comparison-section h2,
.conclusion-sidebar h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-header p,
.section-heading p,
.section-desc,
.function-list-section .section-desc,
.function-detail-section .section-desc,
.scene-function-matrix p,
.faq-section p,
.support-process-section p,
.version-timeline-section .section-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  max-width: 720px;
  margin-bottom: 0;
}

/* --- 状态标签 --- */

.status-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: 999px;
  white-space: nowrap;
  line-height: 1.5;
}

.status-high {
  background-color: var(--color-success-bg);
  color: #047857;
}

.status-mid {
  background-color: var(--color-warning-bg);
  color: #a16207;
}

.status-low {
  background-color: var(--color-danger-bg);
  color: #b91c1c;
}

.status-support {
  background-color: var(--color-success-bg);
  color: #047857;
}

.status-partial {
  background-color: var(--color-warning-bg);
  color: #a16207;
}

/* --- 表格通用 --- */

.matrix-table-wrap,
.table-scroll-wrap,
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-white);
}

.matrix-table,
.function-detail-table,
.comparison-table {
  width: 100%;
  min-width: 640px;
}

.matrix-table th,
.matrix-table td,
.function-detail-table th,
.function-detail-table td,
.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.matrix-table thead th,
.function-detail-table thead th,
.comparison-table thead th {
  background-color: #f8fafc;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.matrix-table tbody tr:last-child td,
.function-detail-table tbody tr:last-child td,
.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.matrix-table tbody th,
.function-detail-table tbody th,
.comparison-table tbody th {
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
}

/* --- 步骤条 --- */

.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step-item {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.step-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: var(--font-size-small);
  font-weight: 700;
  margin-bottom: 14px;
}

.step-item h3,
.step-content h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item p,
.step-content p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- 时间线 --- */

.timeline-list {
  position: relative;
  padding-left: 0;
}

.timeline-item {
  position: relative;
  padding-left: 32px;
  padding-bottom: 28px;
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

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

.timeline-marker {
  position: absolute;
  left: 2px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid var(--color-primary-light);
  z-index: 1;
}

.timeline-content {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.timeline-content h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.version-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: 8px;
}

/* --- FAQ --- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.faq-answer {
  padding: 16px 24px 20px;
}

.faq-answer p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- 代码块 --- */

.config-block {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.config-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background-color: #f8fafc;
  border-bottom: 1px solid var(--color-border);
}

.config-block-header h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 0;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 32px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.copy-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.code-block {
  margin: 0;
  padding: 20px;
  background-color: #1e293b;
  color: #e2e8f0;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: var(--font-size-small);
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

.code-block code {
  font-family: inherit;
}

.config-note {
  padding: 12px 20px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
  margin-bottom: 0;
}

/* --- 相关链接 --- */

.related-links-section {
  margin-top: 48px;
}

.related-links-section h2,
.related-links h2 {
  margin-bottom: 20px;
}

.related-link-grid,
.related-grid,
.related-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.related-link-card,
.related-card {
  display: block;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.related-link-card:hover,
.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.related-link-card h3,
.related-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.related-link-card p,
.related-card p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- 首页相关链接横条 --- */

.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding-top: 32px;
  padding-bottom: 0;
}

.related-links-label {
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-text);
}

.related-links-item {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding: 6px 14px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.related-links-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================================
   Pages · 首页
   ============================================================ */

.home-main {
  padding-bottom: 0;
}

/* --- 品牌定位区 --- */

.brand-position {
  padding-top: 48px;
  padding-bottom: 48px;
}

.position-content {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.position-text h1 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 16px;
}

.position-lead {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
  margin-bottom: 24px;
}

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

.position-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-white);
}

.position-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.content-media {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-white);
}

.content-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.content-media figcaption {
  padding: 12px 20px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

/* --- 服务矩阵 --- */

.service-matrix {
  padding-top: 48px;
  padding-bottom: 48px;
}

.matrix-table-wrap {
  margin-top: 24px;
}

/* --- 使用场景预览 --- */

.scenes-preview {
  padding-top: 48px;
  padding-bottom: 48px;
}

.scene-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.scene-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.scene-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.scene-card p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.scene-card a {
  font-size: var(--font-size-small);
  font-weight: 500;
  margin-top: auto;
}

/* --- 合作流程 --- */

.cooperation-steps {
  padding-top: 48px;
  padding-bottom: 48px;
}

/* --- 最近记录 --- */

.recent-records {
  padding-top: 48px;
  padding-bottom: 48px;
}

/* --- 帮助入口 --- */

.help-entry {
  padding-top: 48px;
  padding-bottom: 48px;
}

.help-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.help-card {
  display: block;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.help-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.help-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 8px;
}

.help-card p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ============================================================
   Pages · 内页通用
   ============================================================ */

/* --- 功能概览页 --- */

.function-overview-block {
  padding-top: 8px;
  padding-bottom: 24px;
}

.function-overview-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-white);
}

.function-overview-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.function-overview-figure figcaption {
  padding: 12px 20px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

.function-list-section,
.function-detail-section {
  padding-top: 32px;
  padding-bottom: 32px;
}

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

.function-anchor-list a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-small);
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.function-anchor-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.function-detail-table {
  min-width: 720px;
}

/* --- 使用场景页 --- */

.scene-panels {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 24px;
  padding-bottom: 48px;
}

.scene-panel {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 32px;
  align-items: center;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.scene-text h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.scene-text p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.scene-text p:last-child {
  margin-bottom: 0;
}

.scene-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.scene-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.scene-figure figcaption {
  padding: 10px 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

.scene-function-matrix {
  padding-top: 32px;
  padding-bottom: 32px;
}

.scene-function-matrix .matrix-table {
  min-width: 720px;
}

/* --- 版本页 --- */

.page-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 32px;
  padding-top: 8px;
  padding-bottom: 48px;
  align-items: start;
}

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

.version-switcher {
  margin-top: 8px;
}

.switcher-group {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.switch-btn {
  padding: 8px 20px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: 40px;
  transition: border-color var(--transition-base), color var(--transition-base), background-color var(--transition-base);
}

.switch-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.version-comparison-section {
  margin-top: 32px;
}

.comparison-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-white);
  margin-bottom: 20px;
}

.comparison-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.comparison-figure figcaption {
  padding: 10px 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

.comparison-table {
  min-width: 720px;
}

.version-timeline-section {
  margin-top: 48px;
}

.conclusion-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.sidebar-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.suggest-block {
  padding: 14px 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.suggest-block:last-child {
  margin-bottom: 0;
}

.suggest-block h3 {
  font-size: var(--font-size-small);
  font-weight: 600;
  margin-bottom: 6px;
}

.suggest-block p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.sidebar-link {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.sidebar-link a {
  font-size: var(--font-size-small);
  font-weight: 500;
}

/* --- 操作指南页 --- */

.step-list-section,
.config-example-section {
  padding-top: 32px;
  padding-bottom: 32px;
}

.guide-flow-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-white);
  margin-top: 24px;
  margin-bottom: 32px;
}

.guide-flow-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.guide-flow-figure figcaption {
  padding: 10px 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

.step-list-section .step-list {
  grid-template-columns: 1fr;
  gap: 16px;
}

.step-list-section .step-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: var(--font-size-base);
  font-weight: 700;
  flex-shrink: 0;
}

.step-tip {
  margin-top: 8px;
  padding: 8px 14px;
  background-color: var(--color-primary-light);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-primary-dark);
}

.config-example-section .config-block {
  margin-top: 20px;
}

/* --- 技术支持页 --- */

.support-hero {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
  padding-top: 24px;
  padding-bottom: 32px;
}

.support-hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.support-hero-image img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.support-hero-text h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.support-hero-text p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.faq-section,
.support-process-section {
  padding-top: 32px;
  padding-bottom: 32px;
}

.support-process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.process-step {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: var(--font-size-small);
  font-weight: 700;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- 关于我们页 --- */

.about-intro {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 32px;
  align-items: center;
  padding-top: 24px;
  padding-bottom: 40px;
}

.intro-text h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 16px;
}

.intro-text p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.intro-text p:last-child {
  margin-bottom: 0;
}

.intro-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.intro-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.intro-figure figcaption {
  padding: 10px 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: #f8fafc;
  border-top: 1px solid var(--color-border);
}

.methodology {
  padding-top: 32px;
  padding-bottom: 40px;
}

.methodology-desc,
.cooperation-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: 8px;
  margin-bottom: 24px;
}

.methodology-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.method-step {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.method-step .step-num {
  margin-bottom: 14px;
}

.method-step .step-content h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 8px;
}

.method-step .step-content p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.cooperation-process {
  padding-top: 32px;
  padding-bottom: 40px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-steps .process-step {
  text-align: left;
}

.step-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav a {
  display: block;
  padding: 10px 14px;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.sidebar-nav a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ============================================================
   Pages · 404
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-panel {
  max-width: 560px;
  text-align: center;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  min-height: 44px;
}

.error-home-link:hover {
  background-color: var(--color-primary-dark);
  color: #ffffff;
}

.error-suggest {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.error-suggest h2 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 12px;
}

.error-suggest ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.error-suggest a {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

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

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
  .position-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .position-figure img {
    height: 220px;
  }

  .scene-panel {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .conclusion-sidebar,
  .page-sidebar {
    position: static;
  }

  .support-hero {
    grid-template-columns: 1fr;
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

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

  .support-process-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .methodology-steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

  .header-inner {
    height: 56px;
    gap: 12px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 4px;
    box-shadow: var(--shadow-md);
  }

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

  .nav-link {
    padding: 12px 16px;
    font-size: var(--font-size-base);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .brand-position {
    padding-top: 32px;
    padding-bottom: 32px;
  }

  .position-text h1 {
    font-size: 26px;
  }

  .content-media img {
    height: 240px;
  }

  .scene-card-grid {
    grid-template-columns: 1fr;
  }

  .help-grid {
    grid-template-columns: 1fr;
  }

  .step-list {
    grid-template-columns: 1fr;
  }

  .support-process-steps {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .methodology-steps {
    grid-template-columns: 1fr;
  }

  .scene-panels {
    padding-top: 16px;
  }

  .scene-panel {
    padding: 20px;
  }

  .scene-figure img {
    height: 180px;
  }

  .function-overview-figure img {
    height: 200px;
  }

  .guide-flow-figure img {
    height: 160px;
  }

  .comparison-figure img {
    height: 180px;
  }

  .support-hero-image img {
    height: 180px;
  }

  .intro-figure img {
    height: 200px;
  }

  .page-header {
    padding-top: 24px;
  }

  .page-title {
    font-size: 26px;
  }

  .breadcrumb {
    padding-top: 12px;
  }

  .related-link-grid,
  .related-grid,
  .related-links-grid {
    grid-template-columns: 1fr;
  }

  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 56px;
  }

  .step-list-section .step-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .step-list-section .step-number {
    margin-bottom: 4px;
  }
}

@media (max-width: 480px) {
  .position-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .position-figure img {
    height: 180px;
  }

  .content-media img {
    height: 200px;
  }

  .matrix-table th,
  .matrix-table td,
  .function-detail-table th,
  .function-detail-table td,
  .comparison-table th,
  .comparison-table td {
    padding: 10px 12px;
    font-size: var(--font-size-xs);
  }

  .timeline-content {
    padding: 16px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: var(--font-size-small);
  }

  .faq-answer {
    padding: 12px 16px 16px;
  }

  .config-block-header {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .code-block {
    padding: 14px;
    font-size: var(--font-size-xs);
  }

  .scene-panel {
    padding: 16px;
  }

  .sidebar-card {
    padding: 16px;
  }

  .suggest-block {
    padding: 10px 12px;
  }
}

/* ============================================================
   Print
   ============================================================ */

@media print {
  .site-header {
    position: static;
  }

  .main-nav,
  .nav-toggle,
  .breadcrumb,
  .related-links,
  .related-links-section,
  .conclusion-sidebar,
  .page-sidebar {
    display: none;
  }

  .site-footer {
    margin-top: 24px;
  }

  body {
    background-color: #ffffff;
    font-size: 12px;
  }

  .site-main.inner-main {
    padding-bottom: 0;
  }

  .page-layout {
    display: block;
  }

  .content-media img,
  .position-figure img,
  .function-overview-figure img,
  .scene-figure img,
  .comparison-figure img,
  .guide-flow-figure img,
  .support-hero-image img,
  .intro-figure img {
    height: auto;
    max-height: 200px;
  }
}