/* ==========================================================================
   国产51吃瓜 · 全站样式表
   版本：1.0
   说明：旅游指南风，地图水色 + 路标绿 + 路线橙
   ========================================================================== */

/* ==========================================================================
   Base — 基础重置与全局变量
   ========================================================================== */

:root {
  --color-primary: #1B5E20;
  --color-primary-dark: #14521A;
  --color-primary-light: #2E7D32;
  --color-secondary: #E0F2F1;
  --color-accent: #FF6F00;
  --color-accent-light: #FFF3E0;
  --color-bg: #FDFDF9;
  --color-text: #263238;
  --color-text-light: #546E7A;
  --color-border: #D7E3E1;
  --color-white: #FFFFFF;
  --color-card-bg: #FFFFFF;
  --color-footer-bg: #1B3A2A;
  --color-footer-text: #B0C4B8;
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  --header-height: 64px;
  --container-width: 1200px;
  --radius-card: 8px;
  --radius-btn: 6px;
  --shadow-card: 0 2px 8px rgba(27, 94, 32, 0.08);
  --shadow-card-hover: 0 6px 16px rgba(27, 94, 32, 0.12);
  --transition: 0.25s ease;
}

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

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

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

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

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

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: 30px;
}

h2 {
  font-size: 23px;
}

h3 {
  font-size: 18px;
}

/* ==========================================================================
   Layout — 全站布局骨架
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 4px rgba(27, 94, 32, 0.06);
}

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

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.brand-tag {
  font-size: 13px;
  color: var(--color-text-light);
  border-left: 2px solid var(--color-accent);
  padding-left: 8px;
  line-height: 1.4;
}

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

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-btn);
}

.main-nav a:hover {
  color: var(--color-primary);
  background-color: var(--color-secondary);
}

.main-nav a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: var(--color-secondary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-main {
  min-height: calc(100vh - var(--header-height) - 320px);
}

.inner-main {
  padding: 32px 0 64px;
}

/* 内容容器 */
.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

/* 右侧栏布局：主内容在前，aside 在后 */
.sidebar-right {
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
}

/* 左侧栏布局：侧栏在前，主内容在后 */
.sidebar-left {
  grid-template-columns: 280px minmax(0, 1fr);
  align-items: start;
}

/* ==========================================================================
   Components — 通用组件
   ========================================================================== */

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 8px;
}

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

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

.page-intro,
.page-title-area p {
  max-width: 760px;
  color: var(--color-text-light);
  font-size: 16px;
}

/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: background-color var(--transition), transform var(--transition);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: transparent;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-btn);
  transition: background-color var(--transition), color var(--transition);
}

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

.btn-outline {
  display: inline-block;
  padding: 10px 22px;
  background-color: transparent;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-btn);
  transition: background-color var(--transition), border-color var(--transition);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--color-white);
  color: var(--color-white);
}

/* 侧栏卡片 */
.sidebar-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h2 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-secondary);
}

.sidebar-card h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

/* 检查表 */
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
}

.check-box {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 2px solid var(--color-primary);
  border-radius: 4px;
  background-color: var(--color-white);
  position: relative;
}

.check-box::after {
  content: '';
  display: none;
  position: absolute;
  left: 4px;
  top: 1px;
  width: 6px;
  height: 10px;
  border: solid var(--color-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.check-text {
  flex: 1;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background-color var(--transition);
}

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

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item[open] summary {
  background-color: var(--color-secondary);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background-color: var(--color-secondary);
}

.faq-answer {
  padding: 4px 20px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
}

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

.faq-answer a {
  font-weight: 600;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  background-color: var(--color-secondary);
  color: var(--color-primary);
  border-radius: 20px;
  transition: background-color var(--transition);
}

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

/* 数字编号 */
.route-num,
.route-no,
.step-num,
.step-number,
.case-no {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

/* ==========================================================================
   Pages — 首页
   ========================================================================== */

/* Hero 首屏 */
.hero {
  position: relative;
  overflow: hidden;
  background-color: var(--color-primary);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(27, 62, 42, 0.72);
}

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

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.hero-left h1 {
  font-size: 32px;
  color: var(--color-white);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-left .btn-primary {
  background-color: var(--color-accent);
}

.hero-left .btn-primary:hover {
  background-color: #E65100;
}

.hero-right {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-card);
  padding: 24px;
  backdrop-filter: blur(4px);
}

.service-network h2 {
  font-size: 17px;
  color: var(--color-white);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
}

.service-network ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.service-network li {
  background-color: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-btn);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--color-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-network li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.hero-actions {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* 区块通用 */
.section-block {
  padding: 56px 24px;
}

.section-head {
  max-width: var(--container-width);
  margin: 0 auto 32px;
}

.section-head h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-head p {
  color: var(--color-text-light);
  max-width: 680px;
}

.section-more {
  max-width: var(--container-width);
  margin: 28px auto 0;
  text-align: right;
}

.section-more a {
  font-weight: 600;
  font-size: 15px;
}

.section-more a::after {
  content: '→';
  margin-left: 6px;
}

/* 服务路线预览 */
.service-preview {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.route-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.route-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.route-num {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}

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

.route-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 合作流程预览 */
.process-preview {
  background-color: var(--color-bg);
}

.process-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  position: relative;
}

.step-item::before {
  content: '';
  position: absolute;
  top: 28px;
  right: -14px;
  width: 28px;
  height: 2px;
  background-color: var(--color-border);
}

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

.step-item .step-num {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 案例方法预览 */
.case-preview {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.case-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.case-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.case-figure {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

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

.case-card h3 {
  padding: 16px 20px 4px;
  font-size: 17px;
}

.case-card p {
  padding: 0 20px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.case-card a {
  display: inline-block;
  margin: 12px 20px 20px;
  font-size: 14px;
  font-weight: 600;
}

.case-card a::after {
  content: '→';
  margin-left: 4px;
}

/* 检验标准预览 */
.standard-preview {
  background-color: var(--color-bg);
}

.standard-list {
  max-width: var(--container-width);
  margin: 0 auto;
}

.standard-list ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.standard-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
}

.standard-note {
  max-width: var(--container-width);
  margin: 16px auto 0;
  font-size: 14px;
  color: var(--color-text-light);
  padding: 12px 16px;
  background-color: var(--color-accent-light);
  border-radius: var(--radius-card);
}

/* FAQ 预览 */
.faq-preview {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.faq-preview-list {
  max-width: var(--container-width);
  margin: 0 auto;
}

.faq-preview-list .faq-item {
  margin-bottom: 12px;
}

.faq-preview-list .faq-item p {
  padding: 4px 20px 8px;
  font-size: 14px;
  color: var(--color-text-light);
}

.faq-preview-list .faq-item a {
  display: inline-block;
  padding: 0 20px 12px;
  font-size: 14px;
  font-weight: 600;
}

/* CTA 区块 */
.cta-section {
  background-color: var(--color-primary);
  padding: 56px 24px;
}

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.cta-inner h2 {
  color: var(--color-white);
  font-size: 24px;
  margin-bottom: 12px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  margin-bottom: 24px;
}

.cta-inner .btn-primary {
  background-color: var(--color-accent);
  font-size: 16px;
  padding: 14px 36px;
}

.cta-inner .btn-primary:hover {
  background-color: #E65100;
}

/* ==========================================================================
   Pages — 服务路线页
   ========================================================================== */

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  gap: 32px;
}

/* 侧栏锚点目录 */
.directory-sidebar .sidebar-card {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

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

.anchor-nav a {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-btn);
  border-left: 3px solid transparent;
}

.anchor-nav a:hover {
  background-color: var(--color-secondary);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.sidebar-tip {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.sidebar-tip a {
  font-weight: 600;
}

/* 总览块 */
.overview-block {
  margin-bottom: 32px;
}

.overview-block h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.overview-block p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.overview-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 7;
}

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

.overview-figure figcaption {
  padding: 8px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-secondary);
}

/* 服务分组 */
.service-groups {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.service-group {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.route-no {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
}

.group-head h2 {
  font-size: 20px;
}

.group-scope {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.scope-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.scope-col {
  background-color: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.7;
}

.scope-col strong {
  display: block;
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.scope-col ul {
  padding-left: 0;
}

.scope-col li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
}

.scope-col li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.scope-col:last-child li::before {
  background-color: var(--color-accent);
}

.group-link {
  margin-top: 16px;
  text-align: right;
}

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

/* 选择建议 */
.choose-guide {
  background-color: var(--color-secondary);
  border-radius: var(--radius-card);
  padding: 28px;
  margin-top: 32px;
}

.choose-guide h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.guide-item {
  background-color: var(--color-white);
  border-radius: var(--radius-card);
  padding: 20px;
}

.guide-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.guide-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.guide-more {
  margin-top: 20px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

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

/* ==========================================================================
   Pages — 案例方法页
   ========================================================================== */

.case-article {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.case-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-secondary);
}

.case-no {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
}

.case-head h2 {
  font-size: 22px;
}

.case-media {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
  aspect-ratio: 16 / 7;
}

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

.case-media figcaption {
  padding: 8px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-secondary);
}

.case-block {
  margin-bottom: 24px;
}

.case-block h3 {
  font-size: 17px;
  color: var(--color-primary);
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
}

.case-block h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.case-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.case-block ul {
  padding-left: 0;
}

.case-block li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
}

.case-block li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

/* 方法总结 */
.method-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
  border-top: 1px solid var(--color-border);
}

.method-summary h2 {
  font-size: 22px;
  margin-bottom: 24px;
}

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

.summary-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-card);
  padding: 20px;
}

.summary-item h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.summary-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.summary-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text-light);
}

.summary-note a {
  font-weight: 600;
  margin-right: 16px;
}

/* ==========================================================================
   Pages — 合作流程页
   ========================================================================== */

.page-process .layout-shell {
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
}

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

/* 步骤导航 */
.step-nav {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 12px 16px;
  margin-bottom: 32px;
}

.sticky-nav {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  z-index: 10;
}

.step-nav ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.step-nav a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: 20px;
  background-color: var(--color-bg);
  transition: background-color var(--transition), color var(--transition);
}

.step-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 步骤块 */
.step-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  margin-bottom: 24px;
  scroll-margin-top: calc(var(--header-height) + 80px);
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.step-number {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.step-head h2 {
  font-size: 19px;
}

.step-block > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

/* 示例卡片 */
.example-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  margin-bottom: 16px;
}

.example-card h3 {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.example-card h3::before {
  content: '示例';
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  padding: 2px 8px;
  border-radius: 4px;
}

.example-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 步骤配图 */
.step-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
  aspect-ratio: 16 / 6;
}

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

.step-figure figcaption {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-secondary);
}

/* 卡点提示 */
.block-tip {
  background-color: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-card);
  padding: 14px 18px;
}

.block-tip h3 {
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.block-tip p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.tip-list {
  padding-left: 0;
}

.tip-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  margin-bottom: 4px;
}

.tip-list li::before {
  content: '!';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* 检查清单侧栏 */
.checklist-sidebar .sidebar-card {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

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

/* 底部引导 */
.bottom-guide {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.bottom-guide h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

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

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

.guide-link:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.guide-link h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.guide-link p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ==========================================================================
   Pages — 检验标准页
   ========================================================================== */

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

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

.title-area p {
  color: var(--color-text-light);
}

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

/* 验收流程侧栏 */
.acceptance-aside .aside-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 20px;
}

.acceptance-aside .aside-card:last-child {
  margin-bottom: 0;
}

.acceptance-aside h2 {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-secondary);
}

.acceptance-steps {
  counter-reset: acceptance;
}

.acceptance-steps li {
  position: relative;
  padding-left: 36px;
  margin-bottom: 14px;
  font-size: 14px;
  line-height: 1.7;
}

.acceptance-steps li::before {
  counter-increment: acceptance;
  content: counter(acceptance);
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
}

.aside-links li {
  margin-bottom: 6px;
}

.aside-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
}

/* 检查说明 */
.checks-intro {
  margin-bottom: 28px;
}

.checks-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
  aspect-ratio: 16 / 6;
}

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

.checks-intro p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* 检查分组 */
.checks-group {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  margin-bottom: 24px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.check-group-head h2 {
  font-size: 19px;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.check-group-head p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.check-block {
  background-color: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 16px 20px;
}

.check-block h3 {
  font-size: 15px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.check-block ul li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.6;
}

.check-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.check-block:last-child ul li::before {
  background-color: var(--color-accent);
}

.check-exclude {
  background-color: var(--color-accent-light);
  border-radius: var(--radius-card);
  padding: 14px 18px;
}

.check-exclude h3 {
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.check-exclude p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

/* ==========================================================================
   Pages — 路上问询页
   ========================================================================== */

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

.faq-group {
  margin-bottom: 32px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.faq-group > h2 {
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-secondary);
}

.faq-answer a {
  font-weight: 600;
}

/* FAQ 侧栏 */
.faq-sidebar .sidebar-card {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.sidebar-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
  aspect-ratio: 4 / 3;
}

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

.sidebar-links li {
  margin-bottom: 8px;
}

.sidebar-links a {
  font-size: 14px;
  font-weight: 600;
}

/* 未覆盖导航 */
.uncovered-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
  background-color: var(--color-secondary);
  border-radius: var(--radius-card);
}

.uncovered-nav h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.uncovered-nav p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.uncovered-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.uncovered-links a {
  display: block;
  background-color: var(--color-white);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.uncovered-links a:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

/* ==========================================================================
   Pages — 发起合作页
   ========================================================================== */

.page-contact .layout-shell {
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
}

.lead {
  color: var(--color-text-light);
  max-width: 720px;
}

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

.prep-intro h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.prep-intro p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.prep-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.prep-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.prep-card h3 {
  font-size: 17px;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-secondary);
}

.prep-card .check-list li {
  font-size: 14px;
}

.prep-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
  aspect-ratio: 16 / 6;
}

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

.prep-figure figcaption {
  padding: 8px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-secondary);
}

/* 发起方式 */
.launch-guide {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
}

.launch-guide h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.launch-guide > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.launch-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.launch-steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.launch-steps .step-num {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.step-body h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-body p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 侧栏 */
.contact-aside .aside-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 20px;
}

.contact-aside .aside-card:last-child {
  margin-bottom: 0;
}

.contact-aside .aside-card h2 {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-secondary);
}

.aside-links li {
  margin-bottom: 8px;
}

.aside-link-btn {
  display: block;
  padding: 10px 16px;
  background-color: var(--color-secondary);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  text-align: center;
  transition: background-color var(--transition), color var(--transition);
}

.aside-link-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 底部 CTA */
.bottom-cta {
  max-width: var(--container-width);
  margin: 40px auto 0;
  padding: 40px 24px;
  background-color: var(--color-primary);
  border-radius: var(--radius-card);
  text-align: center;
}

.bottom-cta h2 {
  color: var(--color-white);
  font-size: 22px;
  margin-bottom: 8px;
}

.bottom-cta p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  margin-bottom: 20px;
}

.cta-button {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: background-color var(--transition);
}

.cta-button:hover {
  background-color: #E65100;
  color: var(--color-white);
}

/* ==========================================================================
   Pages — 404 页
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-box {
  max-width: 560px;
  text-align: center;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.error-box h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-help {
  font-size: 14px;
  color: var(--color-text-light);
}

.error-help a {
  font-weight: 600;
  margin: 0 8px;
}

/* ==========================================================================
   Components — 页脚
   ========================================================================== */

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-size: 15px;
  color: var(--color-white);
  margin-bottom: 14px;
  font-weight: 600;
}

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

.footer-col a {
  font-size: 14px;
  color: var(--color-footer-text);
}

.footer-col a:hover {
  color: var(--color-white);
}

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-footer-text);
}

/* ==========================================================================
   Responsive — 响应式
   ========================================================================== */

/* 桌面端限制导航间距 */
@media (min-width: 769px) {
  .nav-toggle {
    display: none;
  }
}

/* 平板与手机 */
@media (max-width: 1024px) {
  .route-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

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

  .brand-tag {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav.site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(27, 94, 32, 0.1);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .main-nav.site-nav.is-open {
    transform: translateY(0);
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px;
    gap: 2px;
  }

  .main-nav a {
    padding: 12px 16px;
    font-size: 16px;
  }

  /* 布局切换为单列 */
  .layout-shell,
  .sidebar-right,
  .sidebar-left,
  .page-layout,
  .page-process .layout-shell,
  .page-contact .layout-shell {
    grid-template-columns: 1fr;
  }

  .directory-sidebar .sidebar-card,
  .checklist-sidebar .sidebar-card,
  .faq-sidebar .sidebar-card,
  .acceptance-aside .aside-card,
  .contact-aside .aside-card {
    position: static;
  }

  /* 侧栏在手机端显示在正文之后 */
  .sidebar-left .main-column,
  .sidebar-left .main-content {
    order: 1;
  }

  .sidebar-left .directory-sidebar,
  .sidebar-left .sidebar {
    order: 2;
  }

  /* Hero 单列 */
  .hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px;
  }

  .hero-left h1 {
    font-size: 26px;
  }

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

  /* 区块间距 */
  .section-block {
    padding: 40px 16px;
  }

  .section-head h2 {
    font-size: 21px;
  }

  /* 网格降为单列或两列 */
  .route-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .process-steps .step-item::before {
    display: none;
  }

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

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

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

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

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

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

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

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

  .uncovered-links {
    grid-template-columns: 1fr;
  }

  /* 内页间距 */
  .inner-main {
    padding: 24px 0 48px;
  }

  .breadcrumb,
  .page-header,
  .page-title-area,
  .layout-shell,
  .page-layout,
  .case-article,
  .method-summary,
  .bottom-guide,
  .uncovered-nav,
  .bottom-cta,
  .container,
  .title-area {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  /* 步骤导航 */
  .step-nav ol {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }

  .step-nav a {
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* 步骤块 */
  .step-block {
    padding: 20px;
  }

  .step-block > p {
    font-size: 14px;
  }

  /* 服务分组 */
  .service-group {
    padding: 20px;
  }

  /* FAQ */
  .faq-item summary {
    padding: 14px 16px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 4px 16px 14px;
  }

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

  .footer-bottom {
    padding: 12px 16px 20px;
  }

  /* 案例媒体 */
  .case-media {
    aspect-ratio: 16 / 8;
  }

  .overview-figure {
    aspect-ratio: 16 / 9;
  }

  .step-figure {
    aspect-ratio: 16 / 8;
  }

  .checks-figure {
    aspect-ratio: 16 / 8;
  }

  .prep-figure {
    aspect-ratio: 16 / 8;
  }
}

/* 小手机 */
@media (max-width: 480px) {
  .route-grid {
    grid-template-columns: 1fr;
  }

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

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

  .hero-actions .btn-outline {
    text-align: center;
  }

  .hero-left .btn-primary {
    text-align: center;
  }

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

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

  .group-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .step-head {
    align-items: flex-start;
  }

  .launch-steps li {
    flex-direction: column;
    gap: 8px;
  }

  .launch-steps .step-num {
    width: 28px;
    height: 28px;
    line-height: 28px;
    font-size: 13px;
  }

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

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

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