/* ============================================================
   Base —— 全局基础样式
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #222222;
  background-color: #FFFFFF;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #0F3A4C;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #C77700;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.4;
  color: #0F3A4C;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.8em;
}

/* ============================================================
   Layout —— 全站布局骨架
   ============================================================ */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E8E6E1;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: #0F3A4C;
  letter-spacing: 0.02em;
}

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

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

.nav-item {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: #444444;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-item:hover {
  color: #C77700;
  background-color: #F5F4F1;
}

.nav-item.is-current {
  color: #0F3A4C;
  font-weight: 600;
  background-color: #E8E6E1;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #0F3A4C;
  border-radius: 1px;
}

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

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.site-footer {
  background-color: #0F3A4C;
  color: #D8DAD9;
  margin-top: auto;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-text {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #B0B8BC;
  max-width: 320px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 16px;
}

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

.footer-link {
  font-size: 14px;
  color: #B0B8BC;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 24px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: #8A9599;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #888888;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: #0F3A4C;
}

.breadcrumb a:hover {
  color: #C77700;
}

.breadcrumb-sep {
  color: #BBBBBB;
}

.breadcrumb-current {
  color: #666666;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 20px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: #0F3A4C;
  line-height: 1.4;
}

.page-title-area {
  margin-bottom: 40px;
}

.page-title-desc,
.page-intro,
.page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: #555555;
  max-width: 860px;
}

/* 区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: #0F3A4C;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
  max-width: 860px;
}

/* 卡片通用 */
.industry-card {
  background-color: #FFFFFF;
  border: 1px solid #E8E6E1;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.industry-card:hover {
  box-shadow: 0 6px 20px rgba(15, 58, 76, 0.1);
  transform: translateY(-2px);
}

.card-title {
  font-size: 17px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 8px;
}

.card-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* 图片容器 */
.content-figure,
.method-figure,
.process-media,
.help-image-block {
  margin: 40px 0;
}

.figure-image,
.method-image,
.help-image {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid #E8E6E1;
}

.figure-caption,
.help-image-caption {
  font-size: 13px;
  color: #999999;
  text-align: center;
  padding: 10px 0 0;
  line-height: 1.6;
}

/* 相关链接 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #E8E6E1;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: #333333;
}

.related-links-item {
  font-size: 14px;
  color: #0F3A4C;
  padding: 6px 14px;
  border: 1px solid #E8E6E1;
  border-radius: 4px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  border-color: #C77700;
  color: #C77700;
}

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

.related-item {
  font-size: 14px;
}

.related-link {
  color: #0F3A4C;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.related-link:hover {
  border-color: #C77700;
  color: #C77700;
}

/* FAQ 手风琴 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  background-color: #FFFFFF;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #0F3A4C;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: #C77700;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid #E8E6E1;
}

.faq-answer {
  padding: 16px 20px;
  font-size: 15px;
  color: #555555;
  line-height: 1.8;
}

/* 模块通用间距 */
.module-block {
  margin-bottom: 56px;
}

/* ============================================================
   Pages —— 首页
   ============================================================ */
.home-main {
  width: 100%;
}

/* 首屏：服务目录 */
.service-directory {
  background-color: #F7F6F3;
  border-bottom: 1px solid #E8E6E1;
}

.directory-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.directory-content .page-title {
  font-size: 30px;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 18px;
  font-weight: 600;
  color: #C77700;
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 16px;
  color: #555555;
  line-height: 1.8;
  margin-bottom: 24px;
}

.directory-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.directory-item {
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  background-color: #FFFFFF;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.directory-item:hover {
  border-color: #C77700;
  box-shadow: 0 4px 12px rgba(15, 58, 76, 0.08);
}

.directory-link {
  display: block;
  padding: 16px;
  font-size: 15px;
  font-weight: 600;
  color: #0F3A4C;
}

.directory-link:hover {
  color: #C77700;
}

.hero-figure {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #E8E6E1;
}

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

/* 服务定位 */
.service-positioning {
  background-color: #FFFFFF;
}

.positioning-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
}

.positioning-inner .section-title {
  text-align: left;
  margin-bottom: 20px;
}

.positioning-text {
  font-size: 16px;
  color: #444444;
  line-height: 1.9;
  max-width: 860px;
  margin-bottom: 16px;
}

/* 服务领域速览 */
.network-preview {
  background-color: #F7F6F3;
  border-top: 1px solid #E8E6E1;
  border-bottom: 1px solid #E8E6E1;
  padding: 64px 24px;
}

.preview-header {
  max-width: 1200px;
  margin: 0 auto 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.preview-header .section-title {
  margin-bottom: 0;
}

.section-link {
  font-size: 14px;
  font-weight: 600;
  color: #C77700;
  white-space: nowrap;
}

.section-link:hover {
  color: #0F3A4C;
}

.industry-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.network-preview .industry-card {
  overflow: hidden;
  padding: 0;
}

.network-preview .industry-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid #E8E6E1;
}

.network-preview .industry-card .card-title {
  padding: 16px 20px 0;
}

.network-preview .industry-card .card-desc {
  padding: 0 20px 20px;
}

/* 服务方式预览 */
.method-preview {
  padding: 64px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.method-card {
  display: flex;
  gap: 20px;
  border: 1px solid #E8E6E1;
  border-radius: 8px;
  padding: 28px;
  background-color: #FFFFFF;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.method-card:hover {
  box-shadow: 0 6px 20px rgba(15, 58, 76, 0.1);
  transform: translateY(-2px);
}

.method-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 6px;
  background-color: #E8E6E1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-mark {
  display: block;
  width: 20px;
  height: 20px;
  border: 3px solid #0F3A4C;
  border-radius: 50%;
  position: relative;
}

.icon-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  background-color: #C77700;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.method-body .card-title {
  margin-bottom: 8px;
}

/* 合作流程概览 */
.process-preview {
  background-color: #F7F6F3;
  border-top: 1px solid #E8E6E1;
  border-bottom: 1px solid #E8E6E1;
  padding: 64px 24px;
}

.process-steps {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  background-color: #FFFFFF;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  padding: 24px;
  position: relative;
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #0F3A4C;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.process-step .step-title {
  font-size: 16px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 8px;
}

.process-step .step-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* 常见问题精选 */
.faq-preview {
  padding: 64px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.faq-preview .faq-list {
  max-width: 860px;
}

.faq-preview .faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #0F3A4C;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  background-color: #FFFFFF;
}

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

.faq-preview .faq-question::after {
  content: "+";
  font-size: 20px;
  color: #C77700;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-preview .faq-item[open] .faq-question {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-color: transparent;
}

.faq-preview .faq-answer {
  padding: 16px 20px;
  font-size: 15px;
  color: #555555;
  line-height: 1.8;
  border: 1px solid #E8E6E1;
  border-top: none;
  border-radius: 0 0 6px 6px;
  background-color: #FFFFFF;
}

/* 合作引导 */
.cooperation-cta {
  background-color: #0F3A4C;
}

.cta-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px;
  text-align: left;
}

.cta-inner .section-title {
  color: #FFFFFF;
  margin-bottom: 16px;
}

.cta-text {
  font-size: 16px;
  color: #B0B8BC;
  line-height: 1.8;
  max-width: 720px;
  margin-bottom: 24px;
}

.cta-button {
  display: inline-block;
  padding: 12px 32px;
  background-color: #C77700;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.cta-button:hover {
  background-color: #A86300;
  color: #FFFFFF;
}

/* ============================================================
   Pages —— 服务网络（network.html）
   ============================================================ */
.page-network .page-title {
  margin-bottom: 12px;
}

/* 行业标签筛选 */
.industry-filter {
  margin-bottom: 40px;
}

.industry-filter .section-title {
  margin-bottom: 8px;
}

.filter-desc {
  font-size: 14px;
  color: #888888;
  margin-bottom: 16px;
}

.tag-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.filter-tag {
  padding: 8px 18px;
  font-size: 14px;
  color: #444444;
  background-color: #FFFFFF;
  border: 1px solid #E8E6E1;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.filter-tag:hover {
  border-color: #C77700;
  color: #C77700;
}

.filter-tag.is-active {
  background-color: #0F3A4C;
  border-color: #0F3A4C;
  color: #FFFFFF;
}

.filter-clear {
  padding: 8px 18px;
  font-size: 14px;
  color: #0F3A4C;
  background-color: transparent;
  border: 1px solid #0F3A4C;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.filter-clear:hover {
  background-color: #0F3A4C;
  color: #FFFFFF;
}

/* 行业卡片 */
.industry-cards {
  margin-bottom: 48px;
}

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

.industry-cards .industry-card {
  padding: 28px 24px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  background-color: #E8E6E1;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon::before {
  content: "";
  display: block;
  width: 18px;
  height: 18px;
  border: 2px solid #0F3A4C;
  border-radius: 3px;
}

.card-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* 覆盖说明 */
.coverage-note {
  background-color: #F7F6F3;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  padding: 32px;
  margin-bottom: 48px;
}

.coverage-note .section-title {
  font-size: 18px;
  margin-bottom: 12px;
}

.note-text {
  font-size: 15px;
  color: #555555;
  line-height: 1.8;
}

/* ============================================================
   Pages —— 服务方式（method.html）
   ============================================================ */
.page-method .page-title {
  margin-bottom: 12px;
}

.methods-intro {
  margin-bottom: 48px;
}

.methods-intro .section-title {
  margin-bottom: 12px;
}

.methods-intro .section-desc {
  margin-bottom: 16px;
}

/* 对比表 */
.comparison-section {
  margin-bottom: 56px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
}

.method-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.method-table th {
  background-color: #0F3A4C;
  color: #FFFFFF;
  text-align: left;
  padding: 14px 16px;
  font-weight: 600;
  white-space: nowrap;
}

.method-table td {
  padding: 14px 16px;
  border-top: 1px solid #E8E6E1;
  color: #444444;
  line-height: 1.7;
  vertical-align: top;
}

.method-table tbody tr:nth-child(even) {
  background-color: #F7F6F3;
}

.method-table tbody tr:hover {
  background-color: #EFEEEA;
}

/* 适用场景 */
.scenarios-section {
  margin-bottom: 56px;
}

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

.scenario-card {
  border: 1px solid #E8E6E1;
  border-radius: 8px;
  padding: 28px 24px;
  background-color: #FFFFFF;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.scenario-card:hover {
  box-shadow: 0 6px 20px rgba(15, 58, 76, 0.1);
  transform: translateY(-2px);
}

.scenario-title {
  font-size: 17px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 12px;
}

.scenario-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 10px;
}

/* ============================================================
   Pages —— 操作流程（process.html）
   ============================================================ */
.page-process .page-title {
  margin-bottom: 12px;
}

/* 合作步骤 */
.process-steps-section {
  margin-bottom: 56px;
}

.process-steps-section .section-desc {
  margin-bottom: 32px;
}

.process-steps-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  counter-reset: step-counter;
}

.process-step-item {
  display: flex;
  gap: 20px;
  border: 1px solid #E8E6E1;
  border-radius: 8px;
  padding: 28px 24px;
  background-color: #FFFFFF;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.process-step-item:hover {
  box-shadow: 0 6px 20px rgba(15, 58, 76, 0.1);
  transform: translateY(-2px);
}

.process-step-item .step-number {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #0F3A4C;
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
}

.process-step-item .step-content h3 {
  font-size: 17px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 8px;
}

.process-step-item .step-content p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 各阶段交付 */
.deliverables-section {
  margin-bottom: 56px;
}

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

.deliverable-card {
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  padding: 24px;
  background-color: #F7F6F3;
}

.deliverable-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 10px;
}

.deliverable-card p {
  font-size: 14px;
  color: #555555;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 边界说明 */
.boundaries-section {
  margin-bottom: 48px;
  background-color: #F7F6F3;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  padding: 32px;
}

.boundaries-section .section-desc {
  margin-bottom: 16px;
}

.boundaries-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundaries-list li {
  font-size: 15px;
  color: #555555;
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
}

.boundaries-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #C77700;
}

/* ============================================================
   Pages —— 查询帮助（help.html）
   ============================================================ */
.page-help .page-title {
  margin-bottom: 12px;
}

/* 帮助主题分组 */
.help-groups {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 56px;
}

.help-group-card {
  border: 1px solid #E8E6E1;
  border-radius: 8px;
  padding: 28px 24px;
  background-color: #FFFFFF;
  transition: box-shadow 0.25s ease;
}

.help-group-card:hover {
  box-shadow: 0 6px 20px rgba(15, 58, 76, 0.08);
}

.help-group-title {
  font-size: 17px;
  font-weight: 600;
  color: #0F3A4C;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #E8E6E1;
}

.help-link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.help-link-item {
  font-size: 15px;
}

.help-link {
  color: #0F3A4C;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s ease;
}

.help-link::before {
  content: "›";
  color: #C77700;
  font-size: 18px;
  line-height: 1;
}

.help-link:hover {
  color: #C77700;
}

/* 机构信息 */
.institution-info {
  margin-bottom: 48px;
  background-color: #F7F6F3;
  border: 1px solid #E8E6E1;
  border-radius: 6px;
  padding: 32px;
}

.institution-info .section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.section-text {
  font-size: 15px;
  color: #555555;
  line-height: 1.8;
  margin-bottom: 12px;
}

/* 支持联系 */
.support-contact {
  margin-bottom: 48px;
}

.support-contact .section-title {
  margin-bottom: 12px;
}

/* ============================================================
   Pages —— 常见问题（faq.html）
   ============================================================ */
.page-faq .page-title {
  margin-bottom: 12px;
}

.page-title-block {
  margin-bottom: 32px;
}

.faq-intro {
  margin-bottom: 40px;
}

.faq-intro p {
  font-size: 15px;
  color: #666666;
  line-height: 1.8;
}

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

.faq-section .section-title {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid #E8E6E1;
}

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

/* ============================================================
   Pages —— 404
   ============================================================ */
.error-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #F7F6F3;
}

.error-section {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.error-inner {
  text-align: left;
  max-width: 640px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #0F3A4C;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: #0F3A4C;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 28px;
}

.error-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: #0F3A4C;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: #C77700;
  color: #FFFFFF;
}

/* ============================================================
   Responsive —— 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .directory-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 20px;
  }

  .hero-image {
    height: 260px;
  }

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

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

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

  .inner-main {
    padding: 28px 20px 56px;
  }

  .footer-inner {
    padding: 40px 20px 28px;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #E8E6E1;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0;
    gap: 0;
    box-shadow: 0 8px 16px rgba(15, 58, 76, 0.08);
  }

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

  .nav-item {
    padding: 14px 20px;
    border-radius: 0;
    border-bottom: 1px solid #F0EFEB;
  }

  .nav-item.is-current {
    background-color: #F7F6F3;
  }

  .directory-layout {
    padding: 40px 20px;
  }

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

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

  .hero-image {
    height: 220px;
  }

  .positioning-inner,
  .network-preview,
  .method-preview,
  .process-preview,
  .faq-preview,
  .cta-inner {
    padding: 48px 20px;
  }

  .industry-grid,
  .method-grid,
  .scenario-grid,
  .process-steps-list,
  .help-groups {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 20px 24px;
  }

  .footer-tasks {
    order: -1;
  }

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

  .breadcrumb {
    margin-bottom: 16px;
  }

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

  .page-title-area {
    margin-bottom: 32px;
  }

  .coverage-note,
  .boundaries-section,
  .institution-info {
    padding: 24px 20px;
  }

  .method-table th,
  .method-table td {
    padding: 12px;
    white-space: normal;
  }

  .scenario-card,
  .method-card,
  .process-step-item,
  .help-group-card {
    padding: 24px 20px;
  }

  .related-links {
    gap: 10px;
  }

  .related-links-item {
    padding: 6px 12px;
  }

  .error-section {
    padding: 60px 20px;
  }

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

@media (max-width: 480px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand-text {
    font-size: 18px;
  }

  .nav-item {
    font-size: 14px;
  }

  .directory-layout,
  .positioning-inner,
  .network-preview,
  .method-preview,
  .process-preview,
  .faq-preview,
  .cta-inner {
    padding: 40px 16px;
  }

  .inner-main {
    padding: 24px 16px 48px;
  }

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

  .hero-slogan {
    font-size: 16px;
  }

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

  .hero-image {
    height: 180px;
  }

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

  .preview-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .section-link {
    font-size: 14px;
  }

  .method-card {
    flex-direction: column;
    gap: 14px;
  }

  .method-icon {
    width: 44px;
    height: 44px;
  }

  .process-step {
    padding: 20px;
  }

  .process-step .step-number {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .process-step-item {
    flex-direction: column;
    gap: 12px;
  }

  .process-step-item .step-number {
    width: 36px;
    height: 36px;
    font-size: 15px;
  }

  .table-wrapper {
    margin: 0 -16px;
    width: calc(100% + 32px);
    padding: 0 16px;
  }

  .method-table th,
  .method-table td {
    padding: 10px 12px;
    font-size: 13px;
  }

  .faq-item summary,
  .faq-preview .faq-question {
    padding: 14px 16px;
    font-size: 14px;
  }

  .faq-answer,
  .faq-preview .faq-answer {
    padding: 14px 16px;
    font-size: 14px;
  }

  .cta-button {
    display: block;
    text-align: center;
  }

  .footer-inner {
    padding: 36px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px;
  }

  .copyright {
    font-size: 12px;
  }

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

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

  .error-desc {
    font-size: 15px;
  }

  .tag-filter-group {
    gap: 8px;
  }

  .filter-tag {
    padding: 8px 14px;
    font-size: 13px;
  }

  .filter-clear {
    padding: 8px 14px;
    font-size: 13px;
  }

  .help-groups {
    gap: 16px;
  }

  .help-group-card {
    padding: 20px 16px;
  }

  .deliverable-card {
    padding: 20px 16px;
  }

  .boundaries-list li {
    font-size: 14px;
  }
}