/* ==========================================================================
   91吃瓜网官网 - 完整样式表
   现代企业风：高对比文字、真实图片、稳定网格、少量品牌色
   主结构色 #0F3D2E / 强调色 #D97706 / 浅色背景 #F5F4EF / 正文 #1F2933
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.8;
  color: #1F2933;
  background-color: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #0F3D2E;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #D97706;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.4;
  color: #0F3D2E;
}

p {
  margin-bottom: 1rem;
}

/* 焦点可见性 */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid #D97706;
  outline-offset: 2px;
}

/* 按钮基础 */
.btn-primary, .btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #D97706;
  color: #FFFFFF;
  border: 1px solid #D97706;
}

.btn-primary:hover {
  background-color: #B85C00;
  border-color: #B85C00;
  color: #FFFFFF;
}

.btn-secondary {
  background-color: transparent;
  color: #0F3D2E;
  border: 1px solid #0F3D2E;
}

.btn-secondary:hover {
  background-color: #0F3D2E;
  color: #FFFFFF;
  border-color: #0F3D2E;
}

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

/* 全站固定页头 */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E2DA;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #0F3D2E;
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: #6B7280;
  letter-spacing: 0.04em;
}

/* 主导航 */
.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav li {
  margin: 0;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: #1F2933;
  border-radius: 4px;
  white-space: nowrap;
}

.main-nav a:hover {
  color: #0F3D2E;
  background-color: #F5F4EF;
}

.main-nav a.is-current {
  color: #0F3D2E;
  font-weight: 600;
  background-color: #F5F4EF;
}

.header-cta {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: #0F3D2E;
  border-radius: 6px;
  flex-shrink: 0;
  transition: background-color 0.2s ease;
}

.header-cta:hover {
  background-color: #D97706;
  color: #FFFFFF;
}

/* 主内容区 */
.site-main {
  min-height: 60vh;
}

.inner-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: #0F3D2E;
}

.breadcrumb a:hover {
  color: #D97706;
}

.breadcrumb-sep {
  color: #9CA3AF;
  margin: 0 2px;
}

.breadcrumb-current {
  color: #6B7280;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 24px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  color: #0F3D2E;
  margin-bottom: 8px;
}

.page-lead, .page-intro, .page-summary, .page-description, .page-subtitle {
  font-size: 16px;
  color: #4B5563;
  max-width: 760px;
  margin-bottom: 24px;
}

/* 页脚 */
.site-footer {
  background-color: #0F3D2E;
  color: #D1D5DB;
  padding: 48px 0 0;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 40px;
}

.footer-col h3 {
  color: #FFFFFF;
  font-size: 16px;
  margin-bottom: 12px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: #D1D5DB;
  font-size: 14px;
}

.footer-col a:hover {
  color: #D97706;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #9CA3AF;
  margin: 0;
}

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

/* 区块标题 */
.section-title {
  font-size: 24px;
  color: #0F3D2E;
  margin-bottom: 16px;
}

/* 内容图片容器 */
.content-figure {
  margin: 24px 0;
}

.content-figure img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  object-fit: cover;
}

.content-figure figcaption {
  font-size: 13px;
  color: #6B7280;
  padding: 8px 0 0;
  text-align: center;
}

/* 信息卡片 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.info-card {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.info-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.info-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

/* 步骤列表 */
.step-list, .check-list {
  list-style: none;
  counter-reset: step-counter;
}

.step-list li, .check-list li {
  position: relative;
  padding-left: 40px;
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.8;
  counter-increment: step-counter;
}

.step-list li::before, .check-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 4px;
  width: 28px;
  height: 28px;
  background-color: #0F3D2E;
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* 相关链接 */
.related-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid #E5E2DA;
}

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

.link-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.link-group a, .related-links ul li a, .related-links-item {
  display: inline-block;
  padding: 10px 20px;
  background-color: #F5F4EF;
  color: #0F3D2E;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.link-group a:hover, .related-links ul li a:hover, .related-links-item:hover {
  background-color: #0F3D2E;
  color: #FFFFFF;
}

/* 两栏布局：主内容 + 侧栏 */
.layout-shell, .page-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

/* 侧栏目录 */
.page-aside, .page-sidebar, .sidebar-content, .sidebar {
  position: sticky;
  top: 96px;
}

.toc, .aside-toc, .sidebar-nav {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.toc h2, .aside-toc h2, .sidebar-nav h2 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #0F3D2E;
}

.toc ul, .aside-toc ul, .sidebar-nav ul {
  list-style: none;
}

.toc li, .aside-toc li, .sidebar-nav li {
  margin-bottom: 4px;
}

.toc a, .aside-toc a, .sidebar-nav a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: #4B5563;
  border-radius: 4px;
  border-left: 2px solid transparent;
}

.toc a:hover, .aside-toc a:hover, .sidebar-nav a:hover {
  color: #0F3D2E;
  background-color: #FFFFFF;
  border-left-color: #D97706;
}

/* 阅读进度 */
.progress-bar, .reading-progress, .progress-track {
  margin-top: 16px;
}

.progress-label {
  display: block;
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 6px;
}

.progress-track {
  background-color: #E5E2DA;
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
}

.progress-bar, .progress-value {
  display: block;
  height: 6px;
  background-color: #D97706;
  border-radius: 4px;
  width: 0;
  transition: width 0.2s ease;
}

/* FAQ 折叠 */
.faq-list {
  margin-bottom: 32px;
}

.faq-item {
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  margin-bottom: 12px;
  background-color: #FFFFFF;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #0F3D2E;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #D97706;
  font-weight: 400;
}

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

.faq-item summary:hover {
  background-color: #F5F4EF;
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #4B5563;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer a {
  color: #D97706;
  font-weight: 500;
}

/* ==========================================================================
   Pages - 首页
   ========================================================================== */

/* 首屏 hero */
.hero {
  background-color: #F5F4EF;
  border-bottom: 1px solid #E5E2DA;
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
  color: #0F3D2E;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: #4B5563;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-method-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
}

.method-label {
  color: #6B7280;
  font-weight: 500;
}

.hero-method-links a {
  color: #0F3D2E;
  font-weight: 500;
}

.hero-method-links a:hover {
  color: #D97706;
}

.method-sep {
  color: #9CA3AF;
}

.hero-visual {
  display: flex;
  justify-content: flex-end;
}

.hero-figure {
  width: 100%;
  max-width: 520px;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* 区块通用 */
.section-head {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 28px;
  color: #0F3D2E;
  margin-bottom: 8px;
}

.section-head p {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 0;
}

/* 服务范围总览 */
.overview {
  padding: 64px 0;
}

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

.overview-card {
  background-color: #FFFFFF;
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.overview-card:hover {
  box-shadow: 0 4px 16px rgba(15, 61, 46, 0.08);
  border-color: #0F3D2E;
}

.overview-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.overview-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 12px;
}

.overview-card a {
  font-size: 14px;
  font-weight: 600;
  color: #D97706;
}

.overview-card a:hover {
  color: #B85C00;
}

/* 典型应用场景 */
.scenarios {
  background-color: #F5F4EF;
  padding: 64px 0;
}

.scenario-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

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

.scenario-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.scenario-text h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.scenario-text p {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 16px;
}

.scenario-text a {
  font-size: 14px;
  font-weight: 600;
  color: #D97706;
}

/* 方法目录 */
.method {
  padding: 64px 0;
}

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

.method-step {
  background-color: #FFFFFF;
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  padding: 24px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #0F3D2E;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 12px;
}

.method-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.method-step p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 12px;
}

.method-step a {
  font-size: 14px;
  font-weight: 600;
  color: #D97706;
}

/* 热门问题 */
.hot-questions {
  background-color: #F5F4EF;
  padding: 64px 0;
}

.question-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.question-group {
  background-color: #FFFFFF;
  border-radius: 8px;
  padding: 24px;
}

.question-group h3 {
  font-size: 16px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #F5F4EF;
}

.question-group ol {
  list-style: none;
  counter-reset: q-counter;
}

.question-group li {
  counter-increment: q-counter;
  margin-bottom: 8px;
  padding-left: 28px;
  position: relative;
}

.question-group li::before {
  content: counter(q-counter);
  position: absolute;
  left: 0;
  top: 4px;
  width: 20px;
  height: 20px;
  background-color: #F5F4EF;
  color: #0F3D2E;
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.question-group a {
  font-size: 14px;
  color: #1F2933;
}

.question-group a:hover {
  color: #D97706;
}

/* 合作流程 */
.cooperation {
  padding: 64px 0;
}

.cooperation-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.coop-step {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
}

.coop-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: #D97706;
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 8px;
}

.coop-step h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.coop-step p {
  font-size: 13px;
  color: #4B5563;
  margin-bottom: 0;
}

.cooperation-cta {
  text-align: center;
}

/* 咨询入口 */
.cta-panel {
  background-color: #0F3D2E;
  padding: 48px 0;
}

.cta-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-text h2 {
  color: #FFFFFF;
  font-size: 24px;
  margin-bottom: 8px;
}

.cta-text p {
  color: #D1D5DB;
  font-size: 15px;
  margin-bottom: 0;
}

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

.cta-panel .btn-primary {
  background-color: #D97706;
  border-color: #D97706;
}

.cta-panel .btn-primary:hover {
  background-color: #B85C00;
  border-color: #B85C00;
}

.cta-panel .btn-secondary {
  border-color: #FFFFFF;
  color: #FFFFFF;
}

.cta-panel .btn-secondary:hover {
  background-color: #FFFFFF;
  color: #0F3D2E;
}

/* ==========================================================================
   Pages - 内页
   ========================================================================== */

/* guide.html */
.abstract-cards {
  margin-bottom: 40px;
}

.checklist-section, .first-flow {
  margin-bottom: 40px;
}

.checklist-section .content-figure {
  max-width: 640px;
  margin: 24px auto;
}

/* tasks.html */
.role-overview {
  margin-bottom: 40px;
}

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

.role-card {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.role-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.role-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 12px;
}

.role-card ul {
  list-style: none;
}

.role-card li {
  font-size: 14px;
  color: #4B5563;
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}

.role-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: #D97706;
  border-radius: 50%;
}

.execution-path {
  margin-bottom: 40px;
}

.path-block {
  background-color: #FFFFFF;
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.path-block h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.path-block ol {
  padding-left: 20px;
}

.path-block li {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 6px;
}

.handoff-point {
  margin-top: 12px;
  padding: 12px;
  background-color: #F5F4EF;
  border-radius: 6px;
  font-size: 14px;
}

.handoff-point strong {
  color: #0F3D2E;
}

.acceptance-points {
  margin-bottom: 32px;
}

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

.acceptance-list li {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 20px;
}

.acceptance-list h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.acceptance-list p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.related-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  display: inline-block;
  font-size: 14px;
  color: #6B7280;
  margin-right: 8px;
}

/* issues.html */
.error-card-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.error-card {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.error-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.error-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 8px;
}

.troubleshoot-block {
  background-color: #FFFFFF;
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.troubleshoot-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.troubleshoot-block ol {
  padding-left: 20px;
}

.troubleshoot-block li {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 4px;
}

.prevention-list {
  list-style: none;
}

.prevention-list li {
  font-size: 14px;
  color: #4B5563;
  padding: 12px 16px;
  background-color: #F5F4EF;
  border-radius: 6px;
  margin-bottom: 8px;
}

.prevention-list strong {
  color: #0F3D2E;
}

/* advanced.html */
.scene-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.scene-item {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.scene-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.scene-item p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.tips-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.tip-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  padding: 20px;
}

.tip-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.tip-item p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.check-item {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 20px;
}

.check-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.check-item p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

/* updates.html */
.rule-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.rule-item {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.rule-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.rule-item p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.version-table {
  border: 1px solid #E5E2DA;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 32px;
}

.version-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid #E5E2DA;
  font-size: 14px;
}

.version-row:last-child {
  border-bottom: none;
}

.version-head {
  background-color: #0F3D2E;
  color: #FFFFFF;
  font-weight: 600;
}

.version-type {
  color: #0F3D2E;
  font-weight: 600;
}

.version-scope {
  color: #4B5563;
}

.version-action {
  color: #6B7280;
}

/* cooperation.html */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.scope-card {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.scope-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.scope-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.process-list {
  list-style: none;
  counter-reset: process-counter;
  margin-bottom: 24px;
}

.process-list li {
  position: relative;
  padding-left: 48px;
  margin-bottom: 20px;
  counter-increment: process-counter;
}

.process-list li::before {
  content: counter(process-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  background-color: #0F3D2E;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-list h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.process-list p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
}

.process-figure {
  max-width: 640px;
  margin: 24px auto;
}

.duty-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.duty-block {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
}

.duty-block h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.duty-block ul {
  list-style: none;
}

.duty-block li {
  font-size: 14px;
  color: #4B5563;
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}

.duty-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: #D97706;
  border-radius: 50%;
}

.boundary-list {
  list-style: none;
}

.boundary-list li {
  font-size: 14px;
  color: #4B5563;
  padding: 12px 16px;
  background-color: #F5F4EF;
  border-radius: 6px;
  margin-bottom: 8px;
}

/* 侧栏确认清单 */
.sidebar-card {
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
  position: sticky;
  top: 96px;
}

.sidebar-card h2 {
  font-size: 17px;
  margin-bottom: 16px;
}

.sidebar-card .check-item {
  background-color: #FFFFFF;
  padding: 16px;
  margin-bottom: 12px;
}

.sidebar-card .check-item:last-child {
  margin-bottom: 0;
}

.sidebar-card .check-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.sidebar-card .check-item p {
  font-size: 13px;
  color: #4B5563;
  margin-bottom: 0;
}

/* faq.html */
.faq-section {
  margin-bottom: 40px;
}

.faq-section h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.faq-guide-section {
  margin-bottom: 40px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.guide-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.guide-image figcaption {
  font-size: 13px;
  color: #6B7280;
  padding: 8px 0 0;
  text-align: center;
}

.guide-tips h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.guide-tips ol {
  padding-left: 20px;
  margin-bottom: 12px;
}

.guide-tips li {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 8px;
}

.guide-tips p a {
  color: #D97706;
  font-weight: 600;
}

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

.related-card {
  display: block;
  background-color: #F5F4EF;
  border-radius: 8px;
  padding: 24px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.related-card:hover {
  background-color: #0F3D2E;
  transform: translateY(-2px);
}

.related-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: #0F3D2E;
}

.related-card p {
  font-size: 14px;
  color: #4B5563;
  margin-bottom: 0;
  transition: color 0.2s ease;
}

.related-card:hover h3, .related-card:hover p {
  color: #FFFFFF;
}

/* 404 页 */
.error-main {
  background-color: #F5F4EF;
  min-height: calc(100vh - 300px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-panel {
  text-align: center;
  max-width: 560px;
  padding: 48px 24px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #0F3D2E;
  line-height: 1;
  margin-bottom: 8px;
}

.error-panel h1 {
  font-size: 24px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #4B5563;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.error-help {
  font-size: 14px;
  color: #6B7280;
  margin-bottom: 0;
}

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

/* 1024px 断点 */
@media (max-width: 1024px) {
  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

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

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

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

  .layout-shell, .page-layout {
    grid-template-columns: 1fr 240px;
    gap: 24px;
  }

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

/* 768px 断点 */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 8px;
  }

  .brand {
    margin-right: auto;
  }

  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .main-nav ul {
    gap: 0;
    padding-bottom: 4px;
  }

  .main-nav a {
    padding: 8px 12px;
    font-size: 13px;
  }

  .header-cta {
    font-size: 13px;
    padding: 6px 14px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-visual {
    justify-content: center;
  }

  .hero-figure {
    max-width: 100%;
  }

  .scenario-block {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
  }

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

  .page-aside, .page-sidebar, .sidebar-content, .sidebar, .sidebar-card {
    position: static;
    margin-top: 24px;
  }

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

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

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

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

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

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

  .related-cards {
    grid-template-columns: 1fr;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 20px;
  }

  .section-head h2 {
    font-size: 24px;
  }
}

/* 520px 断点 */
@media (max-width: 520px) {
  body {
    font-size: 14px;
  }

  .header-inner {
    padding: 10px 12px;
  }

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

  .brand-tagline {
    font-size: 11px;
  }

  .main-nav a {
    padding: 6px 10px;
    font-size: 12px;
  }

  .header-cta {
    padding: 6px 12px;
    font-size: 12px;
  }

  .inner-main {
    padding: 24px 12px 48px;
  }

  .hero-inner {
    padding: 32px 12px;
  }

  .hero-content h1 {
    font-size: 24px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn-primary, .hero-actions .btn-secondary {
    text-align: center;
  }

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

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

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

  .question-groups {
    grid-template-columns: 1fr;
  }

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

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

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

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

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

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

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

  .page-lead, .page-intro, .page-summary, .page-description, .page-subtitle {
    font-size: 14px;
  }

  .version-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 16px;
  }

  .version-head {
    display: none;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-actions .btn-primary, .cta-actions .btn-secondary {
    text-align: center;
  }

  .error-code {
    font-size: 48px;
  }

  .error-panel h1 {
    font-size: 20px;
  }

  .faq-item summary {
    padding: 14px 44px 14px 16px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 16px 12px;
    font-size: 13px;
  }

  .step-list li, .check-list li {
    padding-left: 36px;
    font-size: 14px;
  }

  .step-list li::before, .check-list li::before {
    width: 24px;
    height: 24px;
    font-size: 12px;
  }

  .process-list li {
    padding-left: 40px;
  }

  .process-list li::before {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }
}

/* 导航移动端适配：更窄屏下允许横向滚动 */
@media (max-width: 380px) {
  .brand-tagline {
    display: none;
  }

  .main-nav a {
    padding: 6px 8px;
    font-size: 12px;
  }
}