/* ============================================================
   BASE — 全局基础样式
   ============================================================ */
:root {
  --bg-page: #f9fafb;
  --bg-card: #ffffff;
  --border-color: #e5e7eb;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --accent-blue: #2563eb;
  --success-green: #10b981;
  --warning-orange: #d97706;
  --font-sans: -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, 'Courier New', monospace;
  --container-width: 1200px;
  --main-content-width: 820px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --header-height: 64px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1e40af;
  text-decoration: underline;
}

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================================
   LAYOUT — 全站布局骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
}

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

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

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.06);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.1);
  font-weight: 600;
}

/* ---------- 面包屑 ---------- */
.breadcrumb,
.breadcrumb-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  width: 100%;
}

.breadcrumb {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--border-color);
}

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

.breadcrumb-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

.breadcrumb-list {
  display: flex;
  list-style: none;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  padding: 0;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li + li::before {
  content: '/';
  color: var(--border-color);
}

.breadcrumb-list a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumb-list a:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.breadcrumb-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ---------- 主内容区 ---------- */
.site-main {
  flex: 1;
  width: 100%;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  width: 100%;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
}

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

.footer-brand {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ============================================================
   LAYOUT — 内页侧边栏布局
   ============================================================ */
.page-layout,
.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  width: 100%;
}

.sidebar-left {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

/* ---------- 侧边目录 ---------- */
.sidebar-toc,
.toc-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  max-height: calc(100vh - var(--header-height) - 48px);
  overflow-y: auto;
}

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

.toc-heading {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-list a {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.toc-list a:hover {
  color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.05);
  border-left-color: var(--accent-blue);
  text-decoration: none;
}

/* ---------- 主内容区（内页） ---------- */
.main-content {
  min-width: 0;
  max-width: var(--main-content-width);
  width: 100%;
}

.page-header {
  margin-bottom: 8px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  margin: 0 0 16px;
}

.page-title-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
}

.page-title-block,
.page-title-area {
  margin-bottom: 24px;
}

.page-title-inner {
  max-width: var(--main-content-width);
}

.page-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 24px;
}

/* ---------- 内容区块 ---------- */
.content-section {
  margin-bottom: 48px;
  padding-top: 8px;
}

.content-section h2 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.section-lead,
.section-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ---------- 相关链接 ---------- */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  margin-top: 32px;
}

.related-links-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.related-links-item {
  font-size: 0.9375rem;
  color: var(--accent-blue);
  text-decoration: none;
}

.related-links-item:hover {
  text-decoration: underline;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
/* ---------- 按钮 ---------- */
.btn-primary,
.btn-secondary,
.action-btn,
.entry-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  min-height: 44px;
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: #1e40af;
  color: #ffffff;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
}

.btn-secondary:hover {
  background-color: rgba(37, 99, 235, 0.06);
  color: #1e40af;
  text-decoration: none;
}

/* ---------- 状态标签 ---------- */
.status-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.status-required {
  composes: status-tag;
  background-color: rgba(217, 119, 6, 0.12);
  color: var(--warning-orange);
  border: 1px solid rgba(217, 119, 6, 0.3);
}

.status-optional {
  composes: status-tag;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ---------- 提示框 ---------- */
.notice-box {
  background-color: rgba(217, 119, 6, 0.06);
  border: 1px solid rgba(217, 119, 6, 0.25);
  border-left: 4px solid var(--warning-orange);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
}

.notice-title {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--warning-orange);
  margin-bottom: 8px;
}

.notice-box p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.notice-box p:last-child {
  margin-bottom: 0;
}

/* ---------- 图片容器 ---------- */
.content-figure,
.scenario-figure {
  margin: 24px 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.content-figure figcaption,
.scenario-figure figcaption {
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

/* ---------- 表格 ---------- */
.table-scroll,
.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
}

.data-table,
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.data-table th,
.data-table td,
.compare-table th,
.compare-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.data-table th,
.compare-table th {
  background-color: #f3f4f6;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.data-table tr:last-child td,
.compare-table tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover,
.compare-table tbody tr:hover {
  background-color: rgba(37, 99, 235, 0.03);
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background-color 0.2s ease;
  min-height: 44px;
}

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

.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-blue);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item summary:hover {
  background-color: rgba(37, 99, 235, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
  border-top: 1px solid var(--border-color);
}

.faq-answer p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: 12px;
  margin-bottom: 0;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
/* ---------- 首屏 ---------- */
.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
  padding: 64px 0 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin: 0;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--accent-blue);
  margin: 0;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.hero-entries {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.entry-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-align: center;
  padding: 14px 12px;
  font-size: 0.875rem;
  font-weight: 500;
}

.entry-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.04);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

/* ---------- 问题导向区 ---------- */
.problem-section {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-header p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
}

.problem-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
}

.problem-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.problem-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.3);
}

.problem-text h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.problem-text p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

.problem-link {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-blue);
  text-decoration: none;
  line-height: 1;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.problem-link:hover {
  color: #1e40af;
  text-decoration: none;
}

/* ---------- 核心服务矩阵 ---------- */
.service-matrix {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

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

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.3);
}

.service-number,
.service-no {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.service-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

.card-link,
.service-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-blue);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
}

.card-link:hover,
.service-link:hover {
  text-decoration: underline;
}

/* ---------- 典型服务场景 ---------- */
.scenario-gallery {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

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

.scenario-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 0;
  transition: box-shadow 0.2s ease;
}

.scenario-card:hover {
  box-shadow: var(--shadow-md);
}

.scenario-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.scenario-card figcaption {
  padding: 20px;
}

.scenario-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- 合作流程概览 ---------- */
.process-preview {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

.process-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 0;
  padding: 0;
}

.process-step {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s ease;
}

.process-step:hover {
  box-shadow: var(--shadow-md);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
}

.process-step h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.process-step p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

.step-link {
  font-size: 0.8125rem;
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 500;
}

.step-link:hover {
  text-decoration: underline;
}

/* ---------- 教育内容区 ---------- */
.education-section {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

.faq-accordion {
  max-width: 820px;
}

.faq-more-link {
  margin-top: 24px;
}

.faq-more-link a {
  font-weight: 500;
}

/* ---------- 合作入口区 ---------- */
.cooperation-section {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

.cooperation-text h2 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.cooperation-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.cooperation-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.action-btn {
  background-color: var(--accent-blue);
  color: #ffffff;
}

.action-btn:hover {
  background-color: #1e40af;
  color: #ffffff;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.action-btn.secondary {
  background-color: transparent;
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
}

.action-btn.secondary:hover {
  background-color: rgba(37, 99, 235, 0.06);
  color: #1e40af;
}

/* ============================================================
   PAGES — 服务方案页
   ============================================================ */
.service-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.service-card-header h3 {
  margin: 0;
}

.service-applies,
.service-method,
.service-output {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.service-applies strong,
.service-method strong,
.service-output strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-primary);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

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

.choice-list {
  list-style: none;
  counter-reset: choice-counter;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.choice-list li {
  counter-increment: choice-counter;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  position: relative;
  padding-left: 68px;
}

.choice-list li::before {
  content: counter(choice-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-blue);
  position: absolute;
  left: 20px;
  top: 20px;
}

.choice-list li p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.choice-list li strong {
  display: block;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.choice-note {
  background-color: rgba(37, 99, 235, 0.05);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.choice-note a {
  font-weight: 500;
}

.entry-buttons {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ============================================================
   PAGES — 信息核实页
   ============================================================ */
.method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.method-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
  text-align: center;
}

.step-body h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-body p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.step-example {
  background-color: rgba(37, 99, 235, 0.04);
  border-left: 3px solid var(--accent-blue);
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 8px;
}

.apply-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.apply-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.apply-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.apply-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.apply-tip {
  font-size: 0.875rem;
  color: var(--success-green);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 12px;
}

.deliverables-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.deliverable-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.deliverable-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.deliverable-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

.section-footer-link {
  margin-top: 24px;
  font-size: 0.9375rem;
}

.section-footer-link a {
  font-weight: 500;
}

/* ============================================================
   PAGES — 服务流程页
   ============================================================ */
.timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-list::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-left: 72px;
  padding-bottom: 32px;
}

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

.timeline-marker {
  position: absolute;
  left: 12px;
  top: 4px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 2px solid var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-marker::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-blue);
}

.timeline-desc {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.timeline-desc h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.timeline-desc p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

.result-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-list li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}

.result-list li::before {
  content: '›';
  position: absolute;
  left: 4px;
  color: var(--success-green);
  font-weight: 700;
}

/* ============================================================
   PAGES — 常见问题页
   ============================================================ */
.faq-intro-text {
  margin-bottom: 32px;
}

.faq-intro-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
}

.faq-group {
  margin-bottom: 48px;
}

.faq-group h2 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.faq-more-link {
  margin-top: 24px;
  font-size: 0.9375rem;
}

.faq-figure {
  margin: 32px 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.faq-figure figcaption {
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

/* ============================================================
   PAGES — 关于我们页
   ============================================================ */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.philosophy-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow 0.2s ease;
}

.philosophy-card:hover {
  box-shadow: var(--shadow-md);
}

.card-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.philosophy-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.philosophy-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

.boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-list li {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.boundary-list strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--warning-orange);
  margin-bottom: 4px;
}

.principle-list {
  list-style: none;
  counter-reset: principle-counter;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.principle-list li {
  counter-increment: principle-counter;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  position: relative;
  padding-left: 72px;
}

.principle-list li::before {
  content: counter(principle-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-blue);
  position: absolute;
  left: 20px;
  top: 20px;
}

.principle-list h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.principle-list p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

.section-footnote {
  margin-top: 24px;
  font-size: 0.9375rem;
}

.section-footnote a {
  font-weight: 500;
}

/* ============================================================
   PAGES — 404 错误页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-section {
  text-align: center;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
  margin: 0;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.error-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ============================================================
   RESPONSIVE — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0;
  }

  .hero-figure img {
    height: 260px;
  }

  .sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
  }

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

  .cooperation-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand-name {
    font-size: 1.125rem;
  }

  .nav-list {
    gap: 4px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 0.875rem;
  }

  .sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-toc,
  .toc-sidebar {
    position: static;
    order: 2;
    max-height: none;
    margin-top: 24px;
  }

  .inner-main {
    padding: 0 16px 32px;
  }

  .page-layout,
  .layout-shell {
    padding: 0 16px 32px;
  }

  .main-content {
    max-width: 100%;
  }

  .page-title {
    font-size: 1.5rem;
  }

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

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

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

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

  .deliverables-wrap {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 16px;
  }

  .content-section h2 {
    font-size: 1.25rem;
  }

  .method-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 16px;
    padding: 16px;
  }

  .step-number {
    font-size: 1.25rem;
  }

  .timeline-item {
    padding-left: 56px;
  }

  .timeline-list::before {
    left: 22px;
  }

  .timeline-marker {
    left: 8px;
    width: 28px;
    height: 28px;
  }

  .choice-list li {
    padding-left: 56px;
  }

  .choice-list li::before {
    left: 16px;
    font-size: 1rem;
  }

  .principle-list li {
    padding-left: 56px;
  }

  .principle-list li::before {
    left: 16px;
    font-size: 1rem;
  }

  .entry-buttons {
    flex-direction: column;
  }

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

@media (max-width: 480px) {
  .header-inner {
    height: auto;
    min-height: var(--header-height);
    flex-wrap: wrap;
    padding: 8px 16px;
    gap: 8px;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .nav-list {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav-link {
    white-space: nowrap;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-section {
    padding: 32px 0;
  }

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

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

  .cooperation-actions {
    width: 100%;
  }

  .action-btn {
    width: 100%;
  }

  .footer-bottom {
    padding: 16px;
  }

  .breadcrumb,
  .breadcrumb-wrap,
  .breadcrumb-inner {
    padding: 12px 16px 0;
  }

  .page-title-wrap {
    padding: 16px 16px 0;
  }

  .page-subtitle {
    font-size: 1rem;
  }

  .content-figure img,
  .scenario-figure img {
    height: 200px;
  }

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

  .table-scroll,
  .table-wrap {
    margin: 16px 0;
  }

  .data-table th,
  .data-table td,
  .compare-table th,
  .compare-table td {
    padding: 10px 12px;
    font-size: 0.875rem;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}