/* ============================================================
   BASE — 全站基础与重置
   ============================================================ */
*, *::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: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #222a35;
  background-color: #f4f6f8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #1b4f72;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #2e8b57;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  color: #1b4f72;
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1rem;
}

figure {
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ============================================================
   LAYOUT — 全站骨架容器
   ============================================================ */
.site-header {
  background-color: #ffffff;
  border-bottom: 2px solid #1b4f72;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-name {
  font-size: 1.375rem;
  font-weight: 700;
  color: #1b4f72;
  letter-spacing: 0;
}

.brand-slogan {
  font-size: 0.75rem;
  color: #6b7a8d;
  margin-top: 2px;
}

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

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #222a35;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav .nav-list li a:hover {
  background-color: #eef2f6;
  color: #1b4f72;
}

.site-nav .nav-list li a.is-current {
  background-color: #1b4f72;
  color: #ffffff;
}

.btn-contact {
  display: inline-block;
  padding: 10px 20px;
  background-color: #1b4f72;
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid #1b4f72;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-contact:hover {
  background-color: #ffffff;
  color: #1b4f72;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.site-footer {
  background-color: #1b4f72;
  color: #dce6f0;
  margin-top: auto;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand .footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-brand .footer-slogan {
  font-size: 0.875rem;
  color: #a9c1d8;
  margin-bottom: 12px;
}

.footer-brand .footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #b8cbd9;
  max-width: 360px;
}

.footer-links h3.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  color: #b8cbd9;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer-links ul li a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-bottom .copyright {
  font-size: 0.8125rem;
  color: #8aa5bc;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
.cta-banner {
  max-width: 1200px;
  margin: 48px auto;
  padding: 48px 40px;
  background-color: #1b4f72;
  border-radius: 8px;
  color: #ffffff;
  text-align: center;
}

.cta-banner .cta-content h2,
.cta-banner .cta-inner .cta-title {
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.cta-banner .cta-content p,
.cta-banner .cta-inner .cta-text {
  color: #c9d8e8;
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 24px;
}

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

.btn-primary,
.btn-secondary,
.btn-light,
.btn-cta,
.btn-back {
  display: inline-block;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #d64541;
  color: #ffffff;
  border: 1px solid #d64541;
}

.btn-primary:hover {
  background-color: #c0392b;
  border-color: #c0392b;
  color: #ffffff;
}

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

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.btn-cta {
  background-color: #d64541;
  color: #ffffff;
  border: 1px solid #d64541;
}

.btn-cta:hover {
  background-color: #c0392b;
  border-color: #c0392b;
  color: #ffffff;
}

.btn-light {
  background-color: #ffffff;
  color: #1b4f72;
  border: 1px solid #ffffff;
}

.btn-light:hover {
  background-color: #eef2f6;
  color: #1b4f72;
}

.btn-back {
  background-color: #1b4f72;
  color: #ffffff;
  border: 1px solid #1b4f72;
}

.btn-back:hover {
  background-color: #ffffff;
  color: #1b4f72;
}

.related-links {
  max-width: 1200px;
  margin: 0 auto 48px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1b4f72;
  margin-right: 4px;
}

.related-links-item {
  font-size: 0.875rem;
  color: #1b4f72;
  background-color: #eef2f6;
  padding: 6px 16px;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  background-color: #1b4f72;
  color: #ffffff;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
.hero-section {
  background-color: #ffffff;
  border-bottom: 1px solid #e3e8ee;
}

.hero-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.25rem;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.0625rem;
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 28px;
}

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

.hero-media .hero-figure {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.hero-media .hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

.service-info-bar {
  grid-column: 1 / -1;
  margin: 48px -24px 0;
  padding: 0 24px;
  background-color: #f4f6f8;
  border-top: 1px solid #e3e8ee;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-item {
  padding: 24px 16px;
  border-left: 3px solid #1b4f72;
}

.info-item:nth-child(2) {
  border-left-color: #d64541;
}

.info-item:nth-child(3) {
  border-left-color: #f4a81d;
}

.info-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #6b7a8d;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.info-value {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  color: #222a35;
}

.service-panel-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
}

.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}

.service-category-panel {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px 24px;
  border: 1px solid #e3e8ee;
}

.panel-title {
  font-size: 1.125rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #1b4f72;
}

.category-list li {
  margin-bottom: 8px;
}

.category-list li a {
  display: block;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #222a35;
  background-color: #f4f6f8;
  border-radius: 4px;
  border-left: 3px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.category-list li a:hover {
  background-color: #eef2f6;
  border-left-color: #1b4f72;
  color: #1b4f72;
}

.service-summary-content h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.service-summary-content p {
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-summary-content .summary-figure {
  border-radius: 8px;
  overflow: hidden;
}

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

.process-summary-section,
.industry-entry-section,
.faq-preview-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

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

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

.section-desc {
  color: #6b7a8d;
  font-size: 1rem;
  max-width: 640px;
}

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

.step-item {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px 24px;
  border: 1px solid #e3e8ee;
  position: relative;
  transition: box-shadow 0.2s ease;
}

.step-item:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.step-item:nth-child(2) .step-number {
  background-color: #d64541;
}

.step-item:nth-child(3) .step-number {
  background-color: #f4a81d;
}

.step-item:nth-child(4) .step-number {
  background-color: #2e8b57;
}

.step-item h3 {
  font-size: 1.125rem;
  margin-bottom: 10px;
}

.step-item p {
  font-size: 0.875rem;
  color: #6b7a8d;
  margin-bottom: 14px;
}

.step-item a {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1b4f72;
}

.step-item a:hover {
  color: #2e8b57;
}

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

.industry-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px 24px;
  border: 1px solid #e3e8ee;
  transition: box-shadow 0.2s ease;
}

.industry-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

.industry-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
  color: #1b4f72;
}

.industry-card p {
  font-size: 0.875rem;
  color: #6b7a8d;
  margin-bottom: 16px;
}

.industry-card a {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1b4f72;
}

.industry-card a:hover {
  color: #2e8b57;
}

.faq-accordion-preview {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e3e8ee;
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid #e3e8ee;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: #222a35;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: #1b4f72;
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-item summary:hover {
  background-color: #f4f6f8;
}

.faq-item p {
  padding: 0 24px 18px;
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
}

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

.faq-more-link a {
  display: inline-block;
  padding: 10px 32px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1b4f72;
  background-color: #eef2f6;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.faq-more-link a:hover {
  background-color: #1b4f72;
  color: #ffffff;
}

/* ============================================================
   PAGES — 内页公共骨架
   ============================================================ */
.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.breadcrumb {
  padding: 24px 0 8px;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: #1b4f72;
}

.breadcrumb a:hover {
  color: #2e8b57;
}

.breadcrumb-sep {
  color: #8aa5bc;
}

.breadcrumb-current {
  color: #6b7a8d;
}

.page-header {
  padding: 8px 0 16px;
}

.page-header .page-title {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-lead,
.page-title-desc {
  font-size: 1rem;
  color: #4a5568;
  max-width: 720px;
  line-height: 1.8;
}

.page-container {
  padding: 8px 0 0;
}

/* ============================================================
   PAGES — 服务方案
   ============================================================ */
.service-intro,
.industry-intro,
.process-intro,
.standards-intro,
.faq-intro,
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 32px 0 48px;
}

.intro-copy h2,
.intro-text h2,
.faq-intro-text h2,
.about-intro .intro-copy h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.intro-copy p,
.intro-text p,
.faq-intro-text p,
.about-intro .intro-copy p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
}

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

.intro-media img,
.intro-figure img,
.process-intro-media img,
.faq-intro-media img,
.media-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.tag-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px 0 32px;
}

.tag-bar a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #1b4f72;
  background-color: #eef2f6;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag-bar a:hover {
  background-color: #1b4f72;
  color: #ffffff;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 48px;
}

.service-card {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e3e8ee;
  overflow: hidden;
}

.service-card-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 28px;
  background-color: #f4f6f8;
  border-bottom: 1px solid #e3e8ee;
}

.service-card-head h2 {
  font-size: 1.25rem;
  margin: 0;
}

.route-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.route-code.route-red {
  background-color: #d64541;
}

.route-code.route-yellow {
  background-color: #f4a81d;
}

.route-code.route-green {
  background-color: #2e8b57;
}

.service-card-body {
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.service-scene h3,
.service-deliverable h3,
.service-note h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #1b4f72;
}

.service-scene p,
.service-note p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin: 0;
}

.service-deliverable ul li {
  font-size: 0.9375rem;
  color: #4a5568;
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
}

.service-deliverable ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #1b4f72;
}

.service-deliverable ul li:nth-child(2)::before {
  background-color: #d64541;
}

.service-deliverable ul li:nth-child(3)::before {
  background-color: #f4a81d;
}

.service-deliverable ul li:nth-child(4)::before {
  background-color: #2e8b57;
}

/* ============================================================
   PAGES — 行业场景
   ============================================================ */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-bottom: 48px;
}

.industry-grid .industry-card {
  display: flex;
  flex-direction: column;
}

.industry-grid .card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.industry-grid .card-head h2 {
  font-size: 1.125rem;
  margin: 0;
}

.industry-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
}

.industry-grid .industry-card:nth-child(2) .industry-code {
  background-color: #d64541;
}

.industry-grid .industry-card:nth-child(3) .industry-code {
  background-color: #2e8b57;
}

.industry-grid .card-desc {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 16px;
}

.industry-grid .card-points {
  margin-bottom: 16px;
}

.industry-grid .card-points li {
  font-size: 0.875rem;
  color: #6b7a8d;
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}

.industry-grid .card-points li::before {
  content: "·";
  position: absolute;
  left: 4px;
  font-size: 1.25rem;
  color: #1b4f72;
}

.industry-grid .card-solution {
  font-size: 0.875rem;
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 16px;
}

.industry-grid .card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1b4f72;
  margin-top: auto;
  display: inline-block;
}

.industry-grid .card-link:hover {
  color: #2e8b57;
}

/* ============================================================
   PAGES — 合作流程
   ============================================================ */
.process-intro-text p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
}

.process-timeline {
  padding: 16px 0 48px;
}

.process-timeline .section-title {
  font-size: 1.375rem;
  margin-bottom: 32px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  margin-bottom: 32px;
  position: relative;
}

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

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.station-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 1.125rem;
  font-weight: 700;
  flex-shrink: 0;
  z-index: 1;
}

.timeline-item:nth-child(2) .station-number {
  background-color: #d64541;
}

.timeline-item:nth-child(3) .station-number {
  background-color: #f4a81d;
}

.timeline-item:nth-child(4) .station-number {
  background-color: #2e8b57;
}

.timeline-line {
  flex: 1;
  width: 2px;
  background-color: #dce6f0;
  margin-top: 4px;
}

.timeline-item:last-child .timeline-line {
  display: none;
}

.timeline-content {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  border: 1px solid #e3e8ee;
}

.timeline-content h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.timeline-desc {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 16px;
}

.deliverables {
  background-color: #f4f6f8;
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.deliverables h4 {
  font-size: 0.875rem;
  margin-bottom: 8px;
  color: #1b4f72;
}

.deliverables ul li {
  font-size: 0.875rem;
  color: #4a5568;
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}

.deliverables ul li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: #1b4f72;
}

.client-role {
  font-size: 0.875rem;
  color: #6b7a8d;
  margin: 0;
}

.client-role strong {
  color: #1b4f72;
}

.process-note {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  border: 1px solid #e3e8ee;
  margin-bottom: 48px;
}

.process-note h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.process-note p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 8px;
}

/* ============================================================
   PAGES — 交付标准
   ============================================================ */
.standards-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 48px;
}

.standard-block {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e3e8ee;
  overflow: hidden;
}

.standard-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  background-color: #f4f6f8;
  border-bottom: 1px solid #e3e8ee;
}

.standard-head h2 {
  font-size: 1.125rem;
  margin: 0;
}

.line-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.line-code.line-code-red {
  background-color: #d64541;
}

.line-code.line-code-yellow {
  background-color: #f4a81d;
}

.line-code.line-code-green {
  background-color: #2e8b57;
}

.standard-items {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.standard-item {
  padding-left: 20px;
  border-left: 3px solid #1b4f72;
}

.standard-block:nth-child(2) .standard-item {
  border-left-color: #d64541;
}

.standard-block:nth-child(3) .standard-item {
  border-left-color: #2e8b57;
}

.standard-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: #1b4f72;
}

.standard-item p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin: 0;
}

/* ============================================================
   PAGES — 帮助中心
   ============================================================ */
.faq-widget {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
  padding-bottom: 48px;
}

.faq-categories {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 24px;
  border: 1px solid #e3e8ee;
  position: sticky;
  top: 88px;
}

.category-tabs li {
  margin-bottom: 8px;
}

.category-tabs li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #222a35;
  background-color: #f4f6f8;
  border-radius: 4px;
  border-left: 3px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.category-tabs li a:hover {
  background-color: #eef2f6;
  border-left-color: #1b4f72;
  color: #1b4f72;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group-title {
  font-size: 1.25rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #1b4f72;
}

.faq-group .faq-item {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e3e8ee;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-group .faq-item summary {
  padding: 16px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #222a35;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #ffffff;
  transition: background-color 0.2s ease;
}

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

.faq-group .faq-item summary::after {
  content: "+";
  font-size: 1.125rem;
  color: #1b4f72;
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-group .faq-item summary:hover {
  background-color: #f4f6f8;
}

.faq-answer {
  padding: 0 20px 16px;
  border-top: 1px solid #e3e8ee;
}

.faq-answer p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin: 12px 0 0;
}

/* ============================================================
   PAGES — 关于我们
   ============================================================ */
.mission-list {
  padding: 16px 0 48px;
}

.mission-list > h2 {
  font-size: 1.375rem;
  margin-bottom: 24px;
}

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

.mission-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px 24px;
  border: 1px solid #e3e8ee;
  transition: box-shadow 0.2s ease;
}

.mission-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

.mission-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #1b4f72;
  color: #ffffff;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.mission-card:nth-child(2) .mission-icon {
  background-color: #d64541;
}

.mission-card:nth-child(3) .mission-icon {
  background-color: #2e8b57;
}

.mission-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 10px;
  color: #1b4f72;
}

.mission-card p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  margin: 0;
}

.cooperation-note {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid #e3e8ee;
  margin-bottom: 48px;
}

.cooperation-inner {
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

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

.cooperation-inner p {
  font-size: 0.9375rem;
  color: #4a5568;
  line-height: 1.8;
  max-width: 720px;
}

.cooperation-inner .btn-primary {
  margin-top: 8px;
}

/* ============================================================
   PAGES — 404
   ============================================================ */
.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.error-section {
  padding: 96px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-code {
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 5rem;
  font-weight: 700;
  color: #1b4f72;
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 1rem;
  color: #6b7a8d;
  max-width: 480px;
  margin-bottom: 28px;
}

/* ============================================================
   RESPONSIVE — 响应式适配
   ============================================================ */
@media (max-width: 1024px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .service-card-body {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 64px;
    gap: 16px;
  }

  .brand-slogan {
    display: none;
  }

  .site-nav .nav-list {
    gap: 2px;
  }

  .site-nav .nav-list li a {
    padding: 6px 10px;
    font-size: 0.8125rem;
  }

  .btn-contact {
    padding: 8px 14px;
    font-size: 0.8125rem;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-bottom {
    padding: 12px 16px 16px;
    flex-direction: column;
    text-align: center;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 0;
  }

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

  .hero-media .hero-figure img {
    height: 240px;
  }

  .service-info-bar {
    grid-template-columns: 1fr;
    gap: 0;
    margin: 32px -16px 0;
    padding: 0 16px;
  }

  .info-item {
    padding: 16px;
  }

  .service-panel-section {
    padding: 48px 16px;
  }

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

  .service-category-panel {
    padding: 20px;
  }

  .process-summary-section,
  .industry-entry-section,
  .faq-preview-section {
    padding: 0 16px 48px;
  }

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

  .step-item {
    padding: 20px;
  }

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

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

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

  .cta-banner {
    margin: 32px 16px;
    padding: 32px 20px;
  }

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

  .breadcrumb {
    padding: 16px 0 8px;
    font-size: 0.8125rem;
    overflow-x: auto;
    white-space: nowrap;
  }

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

  .service-intro,
  .industry-intro,
  .process-intro,
  .standards-intro,
  .faq-intro,
  .about-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px 0 32px;
  }

  .intro-media img,
  .intro-figure img,
  .process-intro-media img,
  .faq-intro-media img,
  .media-figure img {
    height: 220px;
  }

  .tag-bar {
    padding: 8px 0 24px;
  }

  .service-list {
    padding-bottom: 32px;
  }

  .service-card-head {
    padding: 16px 20px;
  }

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

  .timeline-item {
    grid-template-columns: 56px 1fr;
    gap: 16px;
  }

  .station-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .timeline-content {
    padding: 20px;
  }

  .process-timeline {
    padding: 16px 0 32px;
  }

  .process-note {
    padding: 20px;
    margin-bottom: 32px;
  }

  .standard-head {
    padding: 16px 20px;
  }

  .standard-items {
    padding: 20px;
  }

  .faq-widget {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 32px;
  }

  .faq-categories {
    position: static;
    padding: 16px;
  }

  .category-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .category-tabs li {
    margin-bottom: 0;
  }

  .category-tabs li a {
    padding: 8px 14px;
    font-size: 0.8125rem;
  }

  .cooperation-inner {
    padding: 24px;
  }

  .error-section {
    padding: 64px 16px;
    min-height: 50vh;
  }

  .error-code {
    font-size: 3.5rem;
  }

  .related-links {
    padding: 0 16px;
    margin-bottom: 32px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 8px;
    min-height: auto;
  }

  .brand-logo {
    margin-right: auto;
  }

  .site-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .site-nav .nav-list {
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding-bottom: 4px;
  }

  .site-nav .nav-list li a {
    white-space: nowrap;
    padding: 6px 10px;
  }

  .btn-contact {
    margin-left: 0;
  }

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

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

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

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

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

  .footer-bottom .copyright {
    font-size: 0.75rem;
  }
}