/* =========================================================
   base — 全局基础
   ========================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2937;
  background: #ffffff;
}

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

figure {
  margin: 0;
}

a {
  color: #0f172a;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #c2410c;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  color: #0f172a;
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  color: inherit;
}

/* =========================================================
   layout — 全站骨架
   ========================================================= */

.site-header {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

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

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  letter-spacing: 0;
}

.brand-logo:hover .brand-name {
  color: #c2410c;
}

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

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: #1f2937;
  border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: #c2410c;
  background: #f8fafc;
}

.nav-list li a.is-current {
  color: #c2410c;
  background: #f8fafc;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: 4px;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: #0f172a;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-main {
  min-height: 60vh;
}

.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  margin-top: 64px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand {
  font-size: 15px;
  line-height: 1.75;
  color: #e2e8f0;
  max-width: 720px;
  margin-bottom: 24px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #1e293b;
  margin-bottom: 24px;
}

.footer-nav a {
  color: #94a3b8;
  font-size: 14px;
  padding: 4px 0;
}

.footer-nav a:hover {
  color: #ffffff;
}

.footer-services {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 24px;
}

.footer-services a {
  color: #94a3b8;
  font-size: 14px;
  padding: 4px 0;
}

.footer-services a:hover {
  color: #ffffff;
}

.footer-copyright {
  font-size: 13px;
  color: #64748b;
  border-top: 1px solid #1e293b;
  padding-top: 20px;
}

/* =========================================================
   components — 通用组件
   ========================================================= */

/* 面包屑 */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: #64748b;
}

.breadcrumb a {
  color: #64748b;
}

.breadcrumb a:hover {
  color: #c2410c;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #94a3b8;
}

.breadcrumb-current {
  color: #0f172a;
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  padding: 40px 24px;
  margin-bottom: 48px;
}

.page-header .page-title {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
}

.page-header .page-description {
  max-width: 1200px;
  margin: 12px auto 0;
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
}

/* 边界提示条 */
.boundary-notice {
  background: #fff7ed;
  border-left: 4px solid #c2410c;
  padding: 20px 24px;
  border-radius: 0 8px 8px 0;
  margin: 48px 0;
}

.boundary-notice p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.boundary-notice p strong {
  color: #c2410c;
  font-weight: 600;
}

/* 相关链接 */
.related-links {
  max-width: 1200px;
  margin: 48px auto 0;
  padding: 24px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: #0f172a;
}

.related-links-item {
  font-size: 14px;
  color: #1f2937;
  padding: 4px 0;
}

.related-links-item:hover {
  color: #c2410c;
}

/* 折叠问答 */
.faq-item {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #ffffff;
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #0f172a;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: #c2410c;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item summary:hover {
  color: #c2410c;
}

.faq-item[open] summary {
  border-bottom: 1px solid #e2e8f0;
}

.faq-answer {
  padding: 16px 20px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.75;
  color: #1f2937;
}

.faq-answer p + p {
  margin-top: 12px;
}

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

.content-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.content-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

.content-media-inline {
  margin: 32px 0;
}

.content-media-primary {
  margin: 48px 0;
}

/* 文本链接 */
.text-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 600;
  color: #c2410c;
  padding: 4px 0;
}

.text-link:hover {
  color: #0f172a;
}

/* 图文横卡 */
.insight-card,
.case-scenario-item {
  border-bottom: 1px solid #e2e8f0;
  padding: 24px 0;
}

.insight-card:last-child,
.case-scenario-item:last-child {
  border-bottom: none;
}

.insight-card h3 a,
.case-scenario-item h3 a {
  font-size: 20px;
  color: #0f172a;
  line-height: 1.4;
}

.insight-card h3 a:hover,
.case-scenario-item h3 a:hover {
  color: #c2410c;
}

.insight-card p,
.case-scenario-item p {
  margin-top: 8px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

/* 侧栏通用 */
.sidebar,
.page-aside,
.faq-sidebar,
.content-secondary {
  min-width: 0;
}

.sidebar-inner,
.aside-block,
.faq-sidebar {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
}

.sidebar-title,
.aside-title,
.aside-block h2,
.faq-sidebar .sidebar-title {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 16px;
}

.anchor-list li,
.aside-index li,
.faq-category-list li,
.topic-list li {
  border-bottom: 1px solid #e2e8f0;
}

.anchor-list li:last-child,
.aside-index li:last-child,
.faq-category-list li:last-child,
.topic-list li:last-child {
  border-bottom: none;
}

.anchor-list li a,
.aside-index li a,
.faq-category-list li a,
.topic-list li a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: #1f2937;
}

.anchor-list li a:hover,
.aside-index li a:hover,
.faq-category-list li a:hover,
.topic-list li a:hover {
  color: #c2410c;
  padding-left: 4px;
}

.aside-note {
  margin-top: 16px;
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

/* =========================================================
   pages — 首页
   ========================================================= */

/* Hero 区 */
.hero-section {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
}

.hero-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-image-wrap {
  min-width: 0;
}

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

.hero-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #64748b;
}

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

.hero-kicker {
  font-size: 15px;
  font-weight: 600;
  color: #c2410c;
  margin-bottom: 12px;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: #0f172a;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 16px;
  line-height: 1.75;
  color: #1f2937;
  margin-bottom: 24px;
}

.hero-service-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.index-link {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  color: #1f2937;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.index-link:hover {
  border-color: #c2410c;
  color: #c2410c;
}

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  background: #c2410c;
  border-radius: 4px;
  transition: background 0.2s ease;
}

.btn-primary:hover {
  background: #9a3412;
  color: #ffffff;
}

/* 区块通用 */
.section-block {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px;
  border-bottom: 1px solid #e2e8f0;
}

.section-block:last-child {
  border-bottom: none;
}

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

.section-heading h2 {
  font-size: 28px;
  font-weight: 700;
  color: #0f172a;
}

.section-heading p {
  margin-top: 8px;
  font-size: 16px;
  color: #1f2937;
  max-width: 720px;
}

/* 服务能力总览 */
.service-group-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-group {
  min-width: 0;
}

.service-group h3 {
  font-size: 20px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #c2410c;
}

.service-link-list li {
  border-bottom: 1px solid #e2e8f0;
}

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

.service-link-list li a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: #1f2937;
}

.service-link-list li a:hover {
  color: #c2410c;
  padding-left: 4px;
}

/* 行业观察速览 */
.insight-card-list {
  border-top: 1px solid #e2e8f0;
}

/* 案例拆解入口 */
.case-scenario-list {
  border-top: 1px solid #e2e8f0;
}

/* 合作流程预览 */
.process-step-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: 24px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  min-width: 0;
}

.process-step .step-number {
  display: block;
  width: 36px;
  height: 36px;
  background: #0f172a;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: #1f2937;
  line-height: 1.7;
}

/* 首页 FAQ 预览 */
.faq-preview-list {
  max-width: 800px;
}

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

.faq-preview-list .faq-item summary {
  font-size: 16px;
}

.faq-preview-list .faq-item p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

/* =========================================================
   pages — 内页通用
   ========================================================= */

.inner-main {
  background: #ffffff;
}

/* 侧栏在左的两栏布局 */
.page-layout.sidebar-left {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.page-layout.sidebar-left > .sidebar,
.page-layout.sidebar-left > .page-aside,
.page-layout.sidebar-left > .faq-sidebar {
  position: sticky;
  top: 96px;
}

/* 侧栏在右的两栏布局 */
.page-layout.sidebar-right {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

/* 双栏外壳 */
.layout-shell.sidebar-left {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.layout-shell.sidebar-left > .faq-sidebar {
  position: sticky;
  top: 96px;
}

.layout-shell.sidebar-right {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.layout-shell.sidebar-right > .content-secondary {
  position: sticky;
  top: 96px;
}

/* 主内容 */
.main-content,
.page-content,
.content-primary,
.faq-content {
  min-width: 0;
}

/* =========================================================
   pages — 服务能力页
   ========================================================= */

.service-group {
  margin-bottom: 56px;
}

.service-group .group-title {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid #c2410c;
}

.group-intro {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 24px;
}

.service-list {
  border-top: 1px solid #e2e8f0;
}

.service-item {
  padding: 20px 0;
  border-bottom: 1px solid #e2e8f0;
}

.service-name {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 8px;
}

.service-apply {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 8px;
}

.service-delivery {
  font-size: 14px;
  color: #64748b;
  line-height: 1.7;
}

.group-outro {
  margin-top: 24px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
  background: #f8fafc;
  border-radius: 8px;
  padding: 16px 20px;
}

.boundary-title {
  font-size: 20px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 12px;
}

.boundary-content {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.inner-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
}

.inner-links p {
  font-size: 15px;
  color: #1f2937;
}

.inner-links a {
  display: inline-block;
  margin-right: 24px;
  font-weight: 600;
  color: #c2410c;
}

.inner-links a:hover {
  color: #0f172a;
}

/* =========================================================
   pages — 行业观察页
   ========================================================= */

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

.observe-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #c2410c;
}

.observe-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid #e2e8f0;
  align-items: start;
}

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

.observe-figure img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
}

.observe-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 8px;
}

.observe-body h3 a {
  color: #0f172a;
}

.observe-body h3 a:hover {
  color: #c2410c;
}

.observe-body p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.observe-feature {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
}

.observe-feature .observe-body h2 {
  border-bottom: none;
  padding-bottom: 0;
  font-size: 22px;
  margin-bottom: 12px;
}

.observe-feature .observe-body a {
  display: inline-block;
  margin-top: 16px;
  font-weight: 600;
  color: #c2410c;
}

.aside-block + .aside-block {
  margin-top: 24px;
}

.topic-list li a {
  display: inline-block;
}

.archive-list {
  margin-top: 8px;
}

.archive-list li a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: #1f2937;
}

.archive-list li a:hover {
  color: #c2410c;
}

/* =========================================================
   pages — 案例拆解页
   ========================================================= */

.case-scenario {
  margin-bottom: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid #e2e8f0;
}

.case-scenario:last-child {
  border-bottom: none;
}

.scenario-head {
  margin-bottom: 16px;
}

.scenario-head h2 {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.scenario-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #c2410c;
  background: #fff7ed;
  border: 1px solid #fdba74;
  border-radius: 4px;
  padding: 2px 10px;
}

.scenario-desc {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 24px;
}

.method-block,
.deliverable-block,
.acceptance-block {
  margin-bottom: 24px;
}

.method-block h3,
.deliverable-block h3,
.acceptance-block h3 {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 12px;
}

.method-steps {
  counter-reset: method-step;
}

.method-steps li {
  position: relative;
  padding: 8px 0 8px 40px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.method-steps li::before {
  counter-increment: method-step;
  content: counter(method-step);
  position: absolute;
  left: 0;
  top: 8px;
  width: 28px;
  height: 28px;
  background: #0f172a;
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.deliverable-list li {
  position: relative;
  padding: 6px 0 6px 24px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.deliverable-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  width: 8px;
  height: 8px;
  background: #c2410c;
  border-radius: 2px;
}

.acceptance-block p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
  background: #f8fafc;
  border-radius: 8px;
  padding: 16px 20px;
}

.delivery-note {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
}

.delivery-note p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.delivery-note a {
  display: inline-block;
  margin-top: 12px;
  margin-right: 24px;
  font-weight: 600;
  color: #c2410c;
}

.delivery-note a:hover {
  color: #0f172a;
}

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

.process-notice {
  max-width: 800px;
  margin: 0 auto 48px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 16px;
}

.notice-lead {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 16px;
}

.notice-list {
  background: #fff7ed;
  border-left: 4px solid #c2410c;
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
}

.notice-list li {
  position: relative;
  padding: 6px 0 6px 24px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.notice-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  width: 8px;
  height: 8px;
  background: #c2410c;
  border-radius: 2px;
}

.process-steps {
  max-width: 800px;
  margin: 0 auto 48px;
}

.steps-intro {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 24px;
}

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

.step-item {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
  min-width: 0;
}

.step-item .step-number {
  display: block;
  width: 36px;
  height: 36px;
  background: #0f172a;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 12px;
}

.step-output {
  font-size: 14px;
  color: #64748b;
  line-height: 1.7;
}

.step-output strong {
  color: #0f172a;
  font-weight: 600;
}

.process-media {
  max-width: 800px;
  margin: 0 auto 48px;
}

.process-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.process-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #64748b;
}

.process-next {
  max-width: 800px;
  margin: 0 auto 48px;
}

.next-desc {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 24px;
}

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

.link-card {
  display: block;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 20px 24px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.link-card:hover {
  border-color: #c2410c;
  background: #fff7ed;
}

.process-boundary {
  max-width: 800px;
  margin: 0 auto 48px;
  background: #fff7ed;
  border-left: 4px solid #c2410c;
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
}

.process-boundary p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.process-boundary p strong {
  color: #c2410c;
}

/* =========================================================
   pages — 关于我们页
   ========================================================= */

.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.page-layout > .sidebar-right {
  position: sticky;
  top: 96px;
}

.about-section {
  margin-bottom: 40px;
}

.about-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #c2410c;
}

.about-section p {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 12px;
}

.method-list {
  margin-top: 16px;
}

.method-list li {
  position: relative;
  padding: 8px 0 8px 24px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.method-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  background: #c2410c;
  border-radius: 2px;
}

.boundary-list {
  margin-top: 16px;
}

.boundary-list li {
  position: relative;
  padding: 8px 0 8px 24px;
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  background: #64748b;
  border-radius: 2px;
}

.about-links {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
}

.about-links p {
  font-size: 15px;
  color: #1f2937;
}

.about-links a {
  display: inline-block;
  margin-right: 24px;
  font-weight: 600;
  color: #c2410c;
}

.about-links a:hover {
  color: #0f172a;
}

.team-photo {
  margin: 0;
}

.team-photo img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.team-photo figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

/* =========================================================
   pages — 常见问题页
   ========================================================= */

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

.faq-group-title {
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #c2410c;
}

.faq-next {
  margin-bottom: 0;
}

.next-step-block {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: start;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
}

.next-step-media img {
  width: 100%;
  height: 100%;
  min-height: 140px;
  object-fit: cover;
  border-radius: 8px;
}

.next-step-text p {
  font-size: 15px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 12px;
}

.next-step-text p:last-child {
  margin-bottom: 0;
}

/* =========================================================
   pages — 404 页
   ========================================================= */

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

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

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #0f172a;
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 24px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: #1f2937;
  line-height: 1.75;
  margin-bottom: 32px;
}

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

.error-btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  background: #c2410c;
  border-radius: 4px;
  transition: background 0.2s ease;
}

.error-btn:hover {
  background: #9a3412;
  color: #ffffff;
}

.error-btn-secondary {
  background: #f8fafc;
  color: #0f172a;
  border: 1px solid #e2e8f0;
}

.error-btn-secondary:hover {
  background: #e2e8f0;
  color: #0f172a;
}

/* =========================================================
   responsive — 响应式
   ========================================================= */

@media (max-width: 1024px) {
  /* 平板：两栏变窄 */
  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 32px;
  }

  .page-layout.sidebar-right,
  .layout-shell.sidebar-right,
  .page-layout {
    grid-template-columns: 1fr 240px;
    gap: 32px;
  }

  .service-group-grid {
    gap: 24px;
  }

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

  .observe-item {
    grid-template-columns: 120px 1fr;
    gap: 16px;
  }

  .next-step-block {
    grid-template-columns: 160px 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  /* 手机：导航切换 */
  .header-inner {
    height: 64px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
  }

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

  .nav-list li a {
    padding: 12px 8px;
    border-bottom: 1px solid #f1f5f9;
    border-radius: 0;
    font-size: 16px;
  }

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

  /* 手机：单栏 */
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 48px;
  }

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

  .section-block {
    padding: 40px 16px;
  }

  .service-group-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .process-step {
    padding: 20px;
  }

  .page-layout.sidebar-left,
  .page-layout.sidebar-right,
  .layout-shell.sidebar-left,
  .layout-shell.sidebar-right,
  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 0 16px 40px;
  }

  .page-layout.sidebar-left > .sidebar,
  .page-layout.sidebar-left > .page-aside,
  .page-layout.sidebar-left > .faq-sidebar,
  .page-layout.sidebar-right > .content-secondary,
  .layout-shell.sidebar-left > .faq-sidebar,
  .layout-shell.sidebar-right > .content-secondary,
  .page-layout > .sidebar-right {
    position: static;
  }

  /* 手机：侧栏移到主内容之后 */
  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    display: flex;
    flex-direction: column;
  }

  .page-layout.sidebar-left > .sidebar,
  .page-layout.sidebar-left > .page-aside,
  .page-layout.sidebar-left > .faq-sidebar,
  .layout-shell.sidebar-left > .faq-sidebar {
    order: 2;
  }

  .page-layout.sidebar-left > .main-content,
  .page-layout.sidebar-left > .page-content,
  .layout-shell.sidebar-left > .faq-content {
    order: 1;
  }

  /* 手机：侧栏在右的结构 */
  .page-layout.sidebar-right,
  .layout-shell.sidebar-right,
  .page-layout {
    display: flex;
    flex-direction: column;
  }

  .page-layout.sidebar-right > .content-primary,
  .layout-shell.sidebar-right > .content-primary,
  .page-layout > .main-content {
    order: 1;
  }

  .page-layout.sidebar-right > .content-secondary,
  .layout-shell.sidebar-right > .content-secondary,
  .page-layout > .sidebar-right {
    order: 2;
  }

  /* 页面标题 */
  .page-header {
    padding: 32px 16px;
    margin-bottom: 32px;
  }

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

  .breadcrumb {
    padding: 12px 16px 0;
  }

  /* 步骤 */
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .next-links {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 观察条目 */
  .observe-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .observe-figure img {
    height: 160px;
  }

  /* FAQ 下一步 */
  .next-step-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .next-step-media img {
    height: 160px;
    min-height: 0;
  }

  /* 页脚 */
  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-nav,
  .footer-services {
    flex-direction: column;
    gap: 4px;
  }

  /* 相关链接 */
  .related-links {
    padding: 16px;
    margin-top: 32px;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 24px;
  }

  .hero-kicker {
    font-size: 14px;
  }

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

  .index-link {
    font-size: 13px;
    padding: 5px 10px;
  }

  .btn-primary {
    padding: 10px 20px;
    font-size: 15px;
  }

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

  .service-group h3 {
    font-size: 18px;
  }

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

  .page-header .page-description {
    font-size: 15px;
  }

  .faq-item summary {
    font-size: 15px;
    padding: 14px 16px;
  }

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

  .faq-answer p {
    font-size: 14px;
  }
}