/* ============================================================
   吃瓜网热门事件 · 全站样式表
   双色信息风：深蓝主色 + 橙色辅色
   ============================================================ */

/* ============================================================
   1. Base（基础样式）
   ============================================================ */
*, *::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", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #111827;
  background-color: #F8FAFC;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #2563EB;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1E3A8A;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #1E3A8A;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 站点骨架 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* ============================================================
   2. Layout（布局系统）
   ============================================================ */

/* 统一容器宽度 */
.header-inner,
.hero-inner,
.featured-inner,
.section-header,
.process-steps,
.faq-list,
.cta-inner,
.footer-inner,
.breadcrumb,
.page-header,
.container,
.section-desc,
.section-heading,
.related-links[aria-label="相关内容"],
.faq-additional .related-links {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  width: 100%;
}

/* 内页标题区 */
.inner-main .page-header {
  padding-top: 32px;
  padding-bottom: 16px;
}

.page-title {
  font-size: 2rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

/* 面包屑 */
.breadcrumb {
  padding-top: 20px;
  padding-bottom: 0;
  font-size: 0.875rem;
  color: #6B7280;
}

.breadcrumb a {
  color: #2563EB;
}

.breadcrumb a:hover {
  color: #1E3A8A;
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #9CA3AF;
}

.breadcrumb-current {
  color: #374151;
  font-weight: 500;
}

/* 首页主体 */
.home-main {
  flex: 1 0 auto;
}

/* 内页主体 */
.inner-main {
  flex: 1 0 auto;
}

/* 页脚 */
.site-footer {
  background-color: #1E3A8A;
  color: #E5E7EB;
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-col h3 {
  color: #FFFFFF;
  font-size: 1.0625rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background-color: #F97316;
}

.footer-about p {
  font-size: 0.9375rem;
  color: #C7D2FE;
  line-height: 1.8;
  margin-bottom: 0;
}

.footer-links ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}

.footer-links a {
  color: #C7D2FE;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #F97316;
}

.footer-boundary p {
  font-size: 0.9375rem;
  color: #C7D2FE;
  line-height: 1.8;
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 20px;
  text-align: center;
}

.footer-bottom p {
  margin-bottom: 0;
  font-size: 0.875rem;
  color: #A5B4FC;
}

/* ============================================================
   3. Components（通用组件）
   ============================================================ */

/* 页头 */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.375rem;
  font-weight: 700;
  color: #1E3A8A;
}

.brand-tagline {
  font-size: 0.75rem;
  color: #6B7280;
  letter-spacing: 0.02em;
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #374151;
  border-radius: 4px;
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: #2563EB;
  background-color: #F0F4FF;
}

.nav-link.is-current {
  color: #2563EB;
  font-weight: 700;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background-color: #2563EB;
  border-radius: 1px;
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: 6px;
  background-color: transparent;
  transition: background-color 0.2s ease;
}

.nav-toggle:hover {
  background-color: #F0F4FF;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #1E3A8A;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: #2563EB;
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  border: 2px solid #2563EB;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  min-height: 44px;
}

.btn-primary:hover {
  background-color: #1E3A8A;
  border-color: #1E3A8A;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: transparent;
  color: #2563EB;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  border: 2px solid #2563EB;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
  min-height: 44px;
}

.btn-secondary:hover {
  background-color: #F0F4FF;
  color: #1E3A8A;
  transform: translateY(-1px);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: #2563EB;
  transition: color 0.2s ease, gap 0.2s ease;
}

.text-link:hover {
  color: #1E3A8A;
  gap: 10px;
}

.center-link {
  display: inline-flex;
  margin-top: 32px;
}

/* 区块头部 */
.section-header {
  text-align: left;
  margin-bottom: 40px;
}

.section-header h2 {
  font-size: 1.75rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.section-header p {
  color: #6B7280;
  font-size: 1rem;
  max-width: 640px;
  margin-bottom: 0;
}

/* 内容区块标题（内页） */
.section-heading {
  margin-bottom: 32px;
}

.section-heading h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.section-heading p {
  color: #6B7280;
  font-size: 0.9375rem;
  max-width: 640px;
  margin-bottom: 0;
}

/* 卡片通用 */
.service-card,
.related-card,
.model-card,
.report-card,
.scene-card,
.standard-item,
.principle-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.service-card:hover,
.related-card:hover,
.model-card:hover,
.report-card:hover,
.scene-card:hover {
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.08);
  transform: translateY(-3px);
}

/* 图片容器 */
.hero-image-wrap,
.intro-figure,
.content-media,
.intro-media figure {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: #E5E7EB;
}

.hero-image-wrap img,
.intro-figure img,
.content-media img,
.intro-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: #6B7280;
  background-color: #F8FAFC;
  border-top: 1px solid #E5E7EB;
}

/* 页脚相关链接 */
.related-links[aria-label="相关内容"] {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 48px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 0.875rem;
  color: #6B7280;
}

.related-links-item {
  font-size: 0.875rem;
  color: #2563EB;
  padding: 6px 14px;
  background-color: #F0F4FF;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  background-color: #2563EB;
  color: #FFFFFF;
}

/* ============================================================
   4. Pages（页面模块）
   ============================================================ */

/* ---------- 首页 ---------- */

/* Hero 区 */
.hero {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.hero-content h1 {
  font-size: 2.25rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #1E3A8A;
}

.hero-lead {
  font-size: 1.0625rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-categories {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.category-label {
  font-size: 0.875rem;
  color: #6B7280;
  margin-right: 4px;
}

.category-link {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.875rem;
  color: #1E3A8A;
  background-color: #F0F4FF;
  border: 1px solid #DCE6FF;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.category-link:hover {
  background-color: #2563EB;
  border-color: #2563EB;
  color: #FFFFFF;
}

.hero-figure {
  position: relative;
}

.hero-image-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
}

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

.hero-image-wrap figcaption {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background-color: rgba(30, 58, 138, 0.85);
  color: #FFFFFF;
  border: none;
  border-radius: 4px;
  font-size: 0.8125rem;
  padding: 6px 12px;
}

/* 重点服务横幅 */
.featured-service {
  background-color: #F8FAFC;
  padding: 64px 0;
}

.featured-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 40px;
}

.featured-tag {
  display: inline-block;
  background-color: #F97316;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.featured-text h2 {
  font-size: 1.625rem;
  color: #1E3A8A;
  margin-bottom: 12px;
}

.featured-text p {
  color: #374151;
  line-height: 1.8;
  margin-bottom: 12px;
}

.featured-text .text-link {
  margin-top: 8px;
}

.featured-aside {
  border-radius: 8px;
  overflow: hidden;
}

.featured-aside img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

/* 服务分类目录 */
.service-catalog {
  background-color: #FFFFFF;
  padding: 64px 0;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.service-card {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: #F0F4FF;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 1.5rem;
  font-weight: 700;
  color: #2563EB;
}

.service-card h3 {
  font-size: 1.125rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: #2563EB;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  color: #1E3A8A;
  gap: 8px;
}

/* 流程预览 */
.process-preview {
  background-color: #F8FAFC;
  padding: 64px 0;
}

.process-preview .section-header {
  text-align: center;
}

.process-preview .section-header p {
  margin-left: auto;
  margin-right: auto;
}

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

.step-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 32px 24px;
  position: relative;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.step-item:hover {
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.08);
  transform: translateY(-3px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #F97316;
  color: #FFFFFF;
  font-size: 1.125rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step-item h3 {
  font-size: 1.0625rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.process-preview .center-link {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

/* FAQ 预览 */
.faq-preview {
  background-color: #FFFFFF;
  padding: 64px 0;
}

.faq-preview .section-header {
  text-align: center;
}

.faq-preview .section-header p {
  margin-left: auto;
  margin-right: auto;
}

.faq-list {
  max-width: 800px;
}

.faq-item {
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  margin-bottom: 12px;
  background-color: #FFFFFF;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: #1E3A8A;
  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: 1.5rem;
  font-weight: 400;
  color: #2563EB;
  transition: transform 0.3s ease;
}

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

.faq-item summary:hover {
  background-color: #F8FAFC;
}

.faq-item p {
  padding: 0 24px 18px;
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.faq-preview .center-link {
  display: flex;
  justify-content: center;
  margin-top: 32px;
}

/* CTA 区块 */
.cta-section {
  background-color: #1E3A8A;
  padding: 64px 0;
}

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

.cta-inner h2 {
  color: #FFFFFF;
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-inner p {
  color: #C7D2FE;
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-section .btn-primary {
  background-color: #F97316;
  border-color: #F97316;
}

.cta-section .btn-primary:hover {
  background-color: #EA580C;
  border-color: #EA580C;
}

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

.cta-section .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

/* ---------- 内页通用 ---------- */

/* 页面简介区 */
.page-intro {
  padding: 24px 0 48px;
}

.page-intro .intro-text p {
  font-size: 1.0625rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.intro-figure {
  border-radius: 8px;
  overflow: hidden;
}

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

/* 相关推荐 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.related-card {
  display: block;
  padding: 28px;
  border-radius: 8px;
}

.related-card h3 {
  font-size: 1.125rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.related-card:hover h3 {
  color: #2563EB;
}

/* ---------- 服务与能力页 ---------- */

.page-service .page-intro {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.page-service .intro-figure {
  aspect-ratio: 16 / 10;
}

.service-matrix {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.service-matrix h2,
.quality-standards h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.service-matrix .section-desc,
.quality-standards .section-desc {
  color: #6B7280;
  font-size: 0.9375rem;
  margin-bottom: 32px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.matrix-grid .service-card {
  padding: 32px;
}

.matrix-grid .service-card h3 {
  font-size: 1.25rem;
  color: #1E3A8A;
  margin-bottom: 12px;
}

.service-target {
  font-size: 0.875rem;
  color: #F97316;
  font-weight: 600;
  margin-bottom: 8px;
}

.service-desc {
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.7;
  margin-bottom: 12px;
}

.service-deliver {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 16px;
  padding-top: 12px;
  border-top: 1px solid #F0F4FF;
}

.matrix-grid .service-card a {
  font-size: 0.875rem;
  font-weight: 600;
  color: #2563EB;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.matrix-grid .service-card a:hover {
  color: #1E3A8A;
  gap: 8px;
}

.quality-standards {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.standards-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.standard-item {
  padding: 24px;
}

.standard-item h3 {
  font-size: 1rem;
  color: #1E3A8A;
  margin-bottom: 8px;
  position: relative;
  padding-left: 20px;
}

.standard-item h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 8px;
  height: 8px;
  background-color: #F97316;
  border-radius: 2px;
}

.standard-item p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.page-service .related-links {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.page-service .related-links h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 24px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ---------- 事件追踪页 ---------- */

.page-tracking .page-intro {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.page-tracking .intro-figure {
  aspect-ratio: 16 / 10;
}

.method-section,
.report-section,
.scene-section {
  padding: 48px 0;
}

.method-section {
  background-color: #FFFFFF;
}

.report-section {
  background-color: #F8FAFC;
}

.scene-section {
  background-color: #FFFFFF;
}

.method-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.method-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  position: relative;
  padding-bottom: 40px;
}

.method-step:last-child {
  padding-bottom: 0;
}

.method-step::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 56px;
  bottom: 0;
  width: 2px;
  background-color: #E5E7EB;
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background-color: #F0F4FF;
  border: 2px solid #2563EB;
  border-radius: 50%;
  font-size: 1.375rem;
  font-weight: 700;
  color: #2563EB;
  z-index: 1;
  background-color: #FFFFFF;
}

.method-step .step-body {
  padding-top: 8px;
}

.method-step .step-body h3 {
  font-size: 1.25rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.method-step .step-body p {
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.report-card {
  padding: 32px 28px;
}

.report-card h3 {
  font-size: 1.125rem;
  color: #1E3A8A;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.report-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background-color: #F97316;
  border-radius: 2px;
}

.report-cycle {
  display: inline-block;
  background-color: #F0F4FF;
  color: #2563EB;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.report-card p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.scene-card {
  padding: 28px 24px;
}

.scene-card h3 {
  font-size: 1.0625rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.scene-card p {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.page-tracking .related-links {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.page-tracking .related-links .related-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.page-tracking .related-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.related-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #F97316;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.related-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #1E3A8A;
}

.related-desc {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.6;
}

/* ---------- 合作方式页 ---------- */

.page-cooperation .page-intro {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.page-cooperation .intro-figure {
  aspect-ratio: 16 / 10;
}

.role-index-section {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.role-index-section h2,
.model-cards-section h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.section-lead {
  color: #6B7280;
  font-size: 0.9375rem;
  margin-bottom: 32px;
  max-width: 640px;
}

.role-tabs {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.role-tab-head {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid #E5E7EB;
  margin-bottom: 32px;
}

.role-tab-btn {
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: #6B7280;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}

.role-tab-btn:hover {
  color: #2563EB;
}

.role-tab-btn.is-active {
  color: #2563EB;
  border-bottom-color: #2563EB;
}

.role-tab-panel {
  display: none;
}

.role-tab-panel.is-active {
  display: block;
}

.role-panel-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.role-panel-text p {
  font-size: 1rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.role-panel-points {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.role-panel-points p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
  padding: 16px 20px;
  background-color: #F8FAFC;
  border-left: 3px solid #F97316;
  border-radius: 0 6px 6px 0;
}

.model-cards-section {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.model-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.model-card {
  padding: 0;
  overflow: hidden;
}

.model-card-head {
  background-color: #1E3A8A;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.model-tag {
  display: inline-block;
  background-color: #F97316;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

.model-card-head h3 {
  color: #FFFFFF;
  font-size: 1.25rem;
  margin-bottom: 0;
}

.model-card-body {
  padding: 28px;
}

.model-card-body h4 {
  font-size: 0.875rem;
  color: #1E3A8A;
  margin-bottom: 4px;
  position: relative;
  padding-left: 16px;
}

.model-card-body h4::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background-color: #F97316;
  border-radius: 50%;
}

.model-card-body p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 16px;
}

.model-card-body p:last-child {
  margin-bottom: 0;
}

.next-step-section {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.next-step-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px;
  background-color: #F8FAFC;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  text-align: center;
}

.next-step-content h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 12px;
}

.next-step-content p {
  font-size: 1rem;
  color: #374151;
  max-width: 560px;
  margin: 0 auto 24px;
}

.next-step-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- 流程与标准页 ---------- */

.page-process .page-intro {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.content-media-inline {
  aspect-ratio: 16 / 10;
}

.process-section {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.process-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  position: relative;
  padding-bottom: 40px;
}

.process-step:last-child {
  padding-bottom: 0;
}

.process-step::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 56px;
  bottom: 0;
  width: 2px;
  background-color: #E5E7EB;
}

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

.process-step .step-number {
  background-color: #1E3A8A;
  border-color: #1E3A8A;
  color: #FFFFFF;
}

.process-step .step-body {
  padding-top: 8px;
}

.process-step .step-body h3 {
  font-size: 1.25rem;
  color: #1E3A8A;
  margin-bottom: 12px;
}

.step-task,
.step-output,
.step-standard {
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.step-task::before,
.step-output::before,
.step-standard::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.step-task::before {
  background-color: #2563EB;
}

.step-output::before {
  background-color: #F97316;
}

.step-standard::before {
  background-color: #10B981;
}

.step-task {
  color: #374151;
}

.step-output {
  color: #6B7280;
}

.step-standard {
  color: #6B7280;
}

.quality-section {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.quality-table {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  overflow: hidden;
  background-color: #FFFFFF;
}

.quality-row {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 0;
  border-bottom: 1px solid #E5E7EB;
}

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

.quality-row-head {
  background-color: #1E3A8A;
}

.quality-row-head .quality-cell {
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.9375rem;
}

.quality-cell {
  padding: 20px 24px;
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.7;
}

.quality-cell:first-child {
  font-weight: 600;
  color: #1E3A8A;
  background-color: #F8FAFC;
  border-right: 1px solid #E5E7EB;
}

.quality-row-head .quality-cell:first-child {
  background-color: #1E3A8A;
  color: #FFFFFF;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.page-process .related-links {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.page-process .related-links h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 24px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ---------- 常见问题页 ---------- */

.faq-intro {
  padding: 24px 0 48px;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 40px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.faq-intro .intro-text p {
  font-size: 1.0625rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.faq-intro .intro-media {
  border-radius: 8px;
  overflow: hidden;
}

.faq-intro .intro-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.faq-section {
  padding: 40px 0;
}

.service-questions {
  background-color: #FFFFFF;
}

.cooperation-questions {
  background-color: #F8FAFC;
}

.faq-section h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 24px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.faq-section .faq-list {
  max-width: 1200px;
}

.faq-answer {
  padding: 0;
}

.faq-answer p {
  padding: 0 24px 18px;
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0;
}

.faq-additional {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.faq-additional h2 {
  font-size: 1.5rem;
  color: #1E3A8A;
  margin-bottom: 8px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.faq-additional > p {
  color: #6B7280;
  font-size: 0.9375rem;
  margin-bottom: 32px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.faq-additional .related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.faq-additional .related-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 28px;
}

.related-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #1E3A8A;
}

.related-desc {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.6;
}

/* ---------- 关于我们页 ---------- */

.about-intro {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 24px 0 48px;
}

.about-intro .intro-content p {
  font-size: 1.0625rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.about-intro .intro-figure {
  aspect-ratio: 4 / 3;
}

.mission-section {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.mission-content {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.mission-content p {
  font-size: 1rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 860px;
}

.mission-content p:last-child {
  margin-bottom: 0;
}

.principles-section {
  background-color: #F8FAFC;
  padding: 48px 0;
}

.principles-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.principle-item {
  padding: 28px;
}

.principle-item h3 {
  font-size: 1.0625rem;
  color: #1E3A8A;
  margin-bottom: 8px;
  position: relative;
  padding-left: 20px;
}

.principle-item h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background-color: #F97316;
  border-radius: 2px;
}

.principle-item p {
  font-size: 0.9375rem;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.team-note-section {
  background-color: #FFFFFF;
  padding: 48px 0;
}

.team-note-content {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.team-note-content p {
  font-size: 1rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 860px;
}

.team-note-content p:last-child {
  margin-bottom: 0;
}

/* ---------- 404 页 ---------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 0 auto;
  background-color: #F8FAFC;
}

.error-content {
  text-align: center;
  padding: 60px 20px;
  max-width: 560px;
}

.error-content h1 {
  font-size: 3rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.error-code {
  font-size: 5rem;
  font-weight: 800;
  color: #F97316;
  line-height: 1;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 1.0625rem;
  color: #374151;
  margin-bottom: 32px;
}

.error-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  background-color: #2563EB;
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  min-height: 44px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.error-home-btn:hover {
  background-color: #1E3A8A;
  color: #FFFFFF;
  transform: translateY(-1px);
}

/* ============================================================
   5. Responsive（响应式）
   ============================================================ */

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

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

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

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

  .model-card:last-child {
    grid-column: 1 / -1;
    max-width: calc(50% - 12px);
  }

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

  .report-card:last-child {
    grid-column: 1 / -1;
    max-width: calc(50% - 12px);
  }

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

  .footer-boundary {
    grid-column: 1 / -1;
  }
}

/* 移动端 */
@media (max-width: 768px) {
  /* 页头 */
  .header-inner {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #E5E7EB;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px;
    gap: 0;
    z-index: 200;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

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

  .nav-list li {
    border-bottom: 1px solid #F0F4FF;
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: 14px 12px;
    font-size: 1rem;
    border-radius: 4px;
  }

  .nav-link.is-current::after {
    left: 12px;
    right: auto;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    bottom: 50%;
    transform: translateY(50%);
  }

  /* 标题字号 */
  h1 {
    font-size: 1.625rem;
  }

  h2 {
    font-size: 1.375rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  .page-title {
    font-size: 1.625rem;
  }

  /* 首页 Hero */
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

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

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

  .hero-categories {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .category-label {
    margin-bottom: 4px;
  }

  .hero-image-wrap {
    aspect-ratio: 16 / 10;
  }

  /* 重点服务 */
  .featured-service {
    padding: 40px 0;
  }

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

  .featured-aside img {
    aspect-ratio: 16 / 9;
  }

  /* 服务分类 */
  .service-catalog {
    padding: 40px 0;
  }

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

  /* 流程预览 */
  .process-preview {
    padding: 40px 0;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* FAQ 预览 */
  .faq-preview {
    padding: 40px 0;
  }

  .faq-item summary {
    padding: 16px 48px 16px 16px;
    font-size: 0.9375rem;
  }

  .faq-item p {
    padding: 0 16px 16px;
    font-size: 0.875rem;
  }

  /* CTA */
  .cta-section {
    padding: 40px 0;
  }

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

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

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .footer-boundary {
    grid-column: auto;
  }

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

  /* 内页布局 */
  .inner-main .page-header {
    padding-top: 24px;
  }

  /* 内页简介 */
  .page-intro {
    padding: 16px 0 32px;
  }

  .page-service .page-intro,
  .page-tracking .page-intro,
  .page-cooperation .page-intro,
  .page-process .page-intro,
  .about-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-intro {
    padding: 16px 0 32px;
  }

  /* 服务矩阵 */
  .matrix-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  /* 事件追踪 */
  .method-steps,
  .process-steps {
    padding-left: 20px;
    padding-right: 20px;
  }

  .method-step,
  .process-step {
    grid-template-columns: 48px 1fr;
    gap: 16px;
    padding-bottom: 32px;
  }

  .method-step::before,
  .process-step::before {
    left: 23px;
    top: 48px;
  }

  .step-number {
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
  }

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

  .report-card:last-child {
    grid-column: auto;
    max-width: none;
  }

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

  /* 合作方式 */
  .role-tab-head {
    flex-direction: column;
    gap: 0;
    border-bottom: none;
  }

  .role-tab-btn {
    width: 100%;
    text-align: left;
    border-bottom: 1px solid #E5E7EB;
    border-left: 3px solid transparent;
    margin-bottom: 0;
    padding: 14px 16px;
  }

  .role-tab-btn.is-active {
    border-left-color: #2563EB;
    border-bottom-color: #E5E7EB;
    background-color: #F0F4FF;
  }

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

  .model-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .model-card:last-child {
    grid-column: auto;
    max-width: none;
  }

  .next-step-content {
    padding: 24px;
  }

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

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

  /* 流程页 */
  .quality-row {
    grid-template-columns: 1fr;
  }

  .quality-cell {
    padding: 16px;
  }

  .quality-cell:first-child {
    border-right: none;
    border-bottom: 1px solid #E5E7EB;
  }

  .quality-row-head .quality-cell:first-child {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  }

  .step-task,
  .step-output,
  .step-standard {
    padding-left: 16px;
  }

  /* FAQ 页 */
  .faq-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 16px 20px 32px;
  }

  .faq-additional .related-links {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 关于页 */
  .principles-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 相关推荐 */
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .related-links[aria-label="相关内容"] {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
}

/* 小屏手机 */
@media (max-width: 390px) {
  .hero-content h1 {
    font-size: 1.5rem;
  }

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

  .brand-tagline {
    font-size: 0.6875rem;
  }

  .btn-primary,
  .btn-secondary {
    padding: 10px 20px;
    font-size: 0.875rem;
  }

  .cta-inner h2 {
    font-size: 1.375rem;
  }

  .section-header h2 {
    font-size: 1.375rem;
  }

  .step-item {
    padding: 24px 20px;
  }

  .service-card {
    padding: 24px 20px;
  }
}