/* ============================================================
   今日吃瓜企业官网 · 整站样式表
   现代主义海报风：大胆色块、严格对齐、少量大字服务真实内容
   ============================================================ */

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

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

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4d;
  background-color: #f4efe6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #0f1b2d;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #d96c2f;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  color: #0f1b2d;
  line-height: 1.3;
}

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* ============================================================
   Layout — 站点骨架与容器
   ============================================================ */
.header-shell,
.footer-shell,
.hero-layout,
.anchor-shell,
.summary-layout,
.method-head,
.topics-head,
.insights-head,
.faq-head,
.cta-card,
.page-layout,
.layout-shell {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ---- 页头 ---- */
.site-header {
  background-color: #0f1b2d;
  border-bottom: 3px solid #d96c2f;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.brand-logo {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand-logo:hover {
  color: #d96c2f;
}

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

.site-nav .nav-list a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: #dce3ec;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav .nav-list a:hover {
  color: #ffffff;
  border-bottom-color: #d96c2f;
}

.site-nav .nav-list a.is-current {
  color: #ffffff;
  border-bottom-color: #d96c2f;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 10px 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-line {
  display: block;
  width: 26px;
  height: 3px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: #0f1b2d;
  color: #b8c2cf;
  margin-top: 0;
  flex-shrink: 0;
}

.footer-shell {
  padding-top: 48px;
  padding-bottom: 24px;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.7;
  color: #8fa0b3;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}

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

.footer-group ul a {
  font-size: 14px;
  color: #b8c2cf;
}

.footer-group ul a:hover {
  color: #d96c2f;
}

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  margin-top: 16px;
  text-align: center;
  font-size: 14px;
  color: #7e90a6;
}

/* ---- 内页布局骨架 ---- */
.inner-main {
  background-color: #f4efe6;
}

.page-layout,
.layout-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-top: 32px;
  padding-bottom: 56px;
}

/* 侧栏在左的布局：侧栏第一列，正文第二列 */
.sidebar-left .page-layout,
.sidebar-left .layout-shell,
.sidebar-left.page-layout,
.sidebar-left.layout-shell {
  grid-template-columns: 240px minmax(0, 1fr);
}

.sidebar-left .sidebar-nav,
.sidebar-left .sidebar-tree,
.sidebar-left .sidebar-category,
.sidebar-left .sidebar-main-content,
.sidebar-left .content-main,
.sidebar-left .page-content,
.sidebar-left .content-detail {
  min-width: 0;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: #7e90a6;
  margin-bottom: 16px;
}

.breadcrumb a {
  color: #7e90a6;
}

.breadcrumb a:hover {
  color: #d96c2f;
}

.breadcrumb-sep {
  color: #b8c2cf;
}

.breadcrumb-current {
  color: #0f1b2d;
  font-weight: 600;
}

/* ---- 页面标题区 ---- */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: #0f1b2d;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4d;
  max-width: 720px;
}

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

/* ---- 按钮 ---- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  border-radius: 6px;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  border: 2px solid transparent;
  min-height: 44px;
}

.btn-primary {
  background-color: #d96c2f;
  color: #ffffff;
  border-color: #d96c2f;
}

.btn-primary:hover {
  background-color: #c05a22;
  color: #ffffff;
  border-color: #c05a22;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(217, 108, 47, 0.25);
}

.btn-secondary {
  background-color: transparent;
  color: #0f1b2d;
  border-color: #0f1b2d;
}

.btn-secondary:hover {
  background-color: #0f1b2d;
  color: #ffffff;
  transform: translateY(-2px);
}

/* ---- 区块标题 ---- */
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-lead {
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 28px;
  max-width: 720px;
}

.section-link {
  display: inline-block;
  margin-top: 24px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.section-link:hover {
  border-bottom-color: #d96c2f;
}

/* ---- 图片容器 ---- */
figure {
  margin: 0;
}

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

/* ---- 侧栏导航 ---- */
.sidebar-nav,
.sidebar-tree,
.sidebar-category {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 8px;
  padding: 20px 16px;
  position: sticky;
  top: 88px;
}

.sidebar-title,
.sidebar-tree-title,
.tree-title {
  font-size: 15px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee7dc;
}

.sidebar-list,
.sidebar-tree-list,
.tree-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-list a,
.sidebar-tree-list a,
.tree-list a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: #2a3a4d;
  border-radius: 4px;
  border-left: 3px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.sidebar-list a:hover,
.sidebar-tree-list a:hover,
.tree-list a:hover {
  background-color: #f4efe6;
  color: #0f1b2d;
}

.sidebar-list a.is-current,
.sidebar-tree-list a.is-current,
.tree-list a.is-current {
  background-color: #f4efe6;
  color: #0f1b2d;
  font-weight: 700;
  border-left-color: #d96c2f;
}

/* 移动端侧栏折叠 */
.sidebar-details,
.mobile-sidebar-toggle {
  display: none;
}

/* ---- 折叠 FAQ ---- */
.faq-item {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 700;
  color: #0f1b2d;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color 0.2s ease, 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: 22px;
  font-weight: 400;
  color: #d96c2f;
  transition: transform 0.2s ease;
}

.faq-item[open] summary {
  background-color: #f4efe6;
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item p {
  padding: 0 24px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
}

/* ---- 表格 ---- */
.standard-table-wrap {
  overflow-x: auto;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  background-color: #ffffff;
}

.standard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.standard-table th,
.standard-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #eee7dc;
  vertical-align: top;
  line-height: 1.7;
}

.standard-table th {
  background-color: #0f1b2d;
  color: #ffffff;
  font-weight: 700;
  white-space: nowrap;
}

.standard-table tr:last-child td {
  border-bottom: none;
}

.standard-table td:first-child {
  font-weight: 700;
  color: #0f1b2d;
  white-space: nowrap;
}

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

/* ---- Hero 首屏 ---- */
.hero-section {
  background-color: #0f1b2d;
  padding: 72px 0 64px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy {
  color: #ffffff;
}

#hero-heading {
  font-size: 52px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-slogan {
  font-size: 20px;
  font-weight: 600;
  color: #d96c2f;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: #b8c2cf;
  margin-bottom: 32px;
  max-width: 520px;
}

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

.hero-actions .btn-primary {
  background-color: #d96c2f;
  border-color: #d96c2f;
}

.hero-actions .btn-secondary {
  color: #ffffff;
  border-color: #ffffff;
}

.hero-actions .btn-secondary:hover {
  background-color: #ffffff;
  color: #0f1b2d;
}

.hero-media {
  position: relative;
}

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

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

/* ---- 页内锚点条 ---- */
.anchor-bar {
  background-color: #ffffff;
  border-bottom: 1px solid #e0d8cc;
  position: sticky;
  top: 68px;
  z-index: 50;
}

.anchor-shell {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  padding-top: 10px;
  padding-bottom: 10px;
}

.anchor-shell a {
  flex-shrink: 0;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  color: #2a3a4d;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.anchor-shell a:hover {
  color: #d96c2f;
  border-bottom-color: #d96c2f;
}

/* ---- 服务矩阵摘要区 ---- */
.services-summary {
  padding: 64px 0;
  scroll-margin-top: 120px;
}

.summary-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.summary-aside {
  position: sticky;
  top: 130px;
}

.aside-card {
  background-color: #0f1b2d;
  border-radius: 8px;
  padding: 32px 28px;
  color: #ffffff;
}

.aside-title {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.aside-card p {
  font-size: 14px;
  line-height: 1.8;
  color: #b8c2cf;
  margin-bottom: 16px;
}

.aside-subtitle {
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  margin-bottom: 8px;
}

.aside-link {
  display: inline-block;
  margin-top: 8px;
  margin-right: 16px;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  border-bottom: 2px solid #d96c2f;
  padding-bottom: 2px;
}

.aside-link:hover {
  color: #d96c2f;
}

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

#services-summary-title {
  font-size: 30px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  border-color: #d96c2f;
  box-shadow: 0 6px 16px rgba(15, 27, 45, 0.08);
}

.service-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #2a3a4d;
  margin-bottom: 12px;
}

.card-meta {
  font-size: 13px;
  color: #d96c2f;
  font-weight: 600;
  border-top: 1px solid #eee7dc;
  padding-top: 10px;
  margin-bottom: 0 !important;
}

/* ---- 工作方法预览 ---- */
.method-preview {
  padding: 64px 0;
  background-color: #ffffff;
  border-top: 1px solid #e0d8cc;
  border-bottom: 1px solid #e0d8cc;
  scroll-margin-top: 120px;
}

.method-head {
  text-align: left;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 8px;
}

.method-step {
  background-color: #f4efe6;
  border-radius: 6px;
  padding: 28px 24px;
  border-top: 4px solid #d96c2f;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.method-step:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(15, 27, 45, 0.08);
}

.method-step .step-number {
  display: inline-block;
  font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
  font-size: 36px;
  font-weight: 700;
  color: #d96c2f;
  line-height: 1;
  margin-bottom: 16px;
}

.method-step h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 10px;
}

.method-step p {
  font-size: 14px;
  line-height: 1.7;
  color: #2a3a4d;
}

/* ---- 服务专题预览 ---- */
.topics-preview {
  padding: 64px 0;
  scroll-margin-top: 120px;
}

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

.topic-entry {
  display: block;
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.topic-entry:hover {
  transform: translateY(-3px);
  border-color: #d96c2f;
  box-shadow: 0 6px 16px rgba(15, 27, 45, 0.08);
}

.topic-figure {
  width: 100%;
  height: 160px;
  overflow: hidden;
}

.topic-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.topic-entry:hover .topic-figure img {
  transform: scale(1.04);
}

.topic-entry h3 {
  font-size: 17px;
  font-weight: 700;
  color: #0f1b2d;
  padding: 16px 20px 6px;
}

.topic-entry p {
  font-size: 14px;
  line-height: 1.7;
  color: #2a3a4d;
  padding: 0 20px 12px;
}

.topic-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: #d96c2f;
  padding: 0 20px 18px;
}

/* ---- 服务观察列表 ---- */
.insights-list {
  padding: 64px 0;
  background-color: #ffffff;
  border-top: 1px solid #e0d8cc;
  border-bottom: 1px solid #e0d8cc;
  scroll-margin-top: 120px;
}

.insight-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.insight-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  background-color: #f4efe6;
  border-radius: 6px;
  padding: 16px;
  transition: background-color 0.2s ease;
}

.insight-item:hover {
  background-color: #eee7dc;
}

.insight-item img {
  width: 180px;
  height: 120px;
  object-fit: cover;
  border-radius: 4px;
}

.insight-copy h3 {
  font-size: 17px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 6px;
}

.insight-copy p {
  font-size: 14px;
  line-height: 1.7;
  color: #2a3a4d;
  margin-bottom: 8px;
}

.insight-copy a {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: #d96c2f;
}

/* ---- FAQ 预览 ---- */
.faq-preview {
  padding: 64px 0;
  scroll-margin-top: 120px;
}

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

/* ---- 合作引导区 ---- */
.cta-guide {
  padding: 0 0 64px;
}

.cta-card {
  background-color: #0f1b2d;
  border-radius: 8px;
  padding: 48px;
  text-align: center;
}

#cta-title {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.cta-card p {
  font-size: 16px;
  line-height: 1.8;
  color: #b8c2cf;
  max-width: 560px;
  margin: 0 auto 28px;
}

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

.cta-actions .btn-primary {
  background-color: #d96c2f;
  border-color: #d96c2f;
}

.cta-actions .btn-secondary {
  color: #ffffff;
  border-color: #ffffff;
}

.cta-actions .btn-secondary:hover {
  background-color: #ffffff;
  color: #0f1b2d;
}

/* ============================================================
   Pages — 内页共用
   ============================================================ */

/* ---- 内页：服务总览 ---- */
.content-main {
  min-width: 0;
}

.page-figure {
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 32px;
}

.page-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.page-figure figcaption {
  background-color: #ffffff;
  padding: 10px 16px;
  font-size: 13px;
  color: #7e90a6;
  border: 1px solid #e0d8cc;
  border-top: none;
}

.service-list h2 {
  font-size: 26px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid #d96c2f;
}

.service-item {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
  margin-bottom: 20px;
}

.service-item h3 {
  font-size: 20px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.service-item > p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.service-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid #eee7dc;
  padding-top: 14px;
}

.meta-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
}

.meta-row dt {
  font-weight: 700;
  color: #0f1b2d;
}

.meta-row dd {
  color: #2a3a4d;
}

.service-combination {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 32px;
  margin-top: 8px;
}

.service-combination h2 {
  font-size: 24px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 16px;
}

.service-combination p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.service-combination ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}

.service-combination ul li {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 6px;
}

.service-combination a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
}

.service-combination a:hover {
  border-bottom-color: #d96c2f;
}

/* ---- 内页：工作方法 ---- */
.sidebar-main-content {
  min-width: 0;
}

.method-hero-figure {
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 32px;
}

.method-hero-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.method-steps-section {
  margin-bottom: 48px;
}

.method-steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.method-step-item {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
  border-left: 4px solid #d96c2f;
}

.method-step-item .step-number {
  display: inline-block;
  font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
  font-size: 32px;
  font-weight: 700;
  color: #d96c2f;
  line-height: 1;
  margin-bottom: 12px;
}

.method-step-item .step-name {
  font-size: 20px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.method-step-item .step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 12px;
}

.method-step-item .step-output {
  font-size: 14px;
  line-height: 1.7;
  color: #7e90a6;
  background-color: #f4efe6;
  border-radius: 4px;
  padding: 10px 14px;
}

.delivery-standard-section {
  margin-bottom: 48px;
}

.method-application-section {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
}

.method-application-section .section-text {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.method-application-section a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
}

.method-application-section a:hover {
  border-bottom-color: #d96c2f;
}

/* ---- 内页：合作流程 ---- */
.page-content {
  min-width: 0;
}

.content-figure {
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 32px;
}

.content-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.content-figure figcaption {
  background-color: #ffffff;
  padding: 10px 16px;
  font-size: 13px;
  color: #7e90a6;
  border: 1px solid #e0d8cc;
  border-top: none;
}

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

.process-steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  counter-reset: step;
}

.process-step-item {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
  border-left: 4px solid #d96c2f;
  position: relative;
}

.process-step-item .step-number {
  display: inline-block;
  font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
  font-size: 32px;
  font-weight: 700;
  color: #d96c2f;
  line-height: 1;
  margin-bottom: 12px;
}

.process-step-item .step-name {
  font-size: 20px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.process-step-item .step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 10px;
}

.process-step-item .step-boundary {
  font-size: 14px;
  line-height: 1.7;
  color: #7e90a6;
  background-color: #f4efe6;
  border-radius: 4px;
  padding: 10px 14px;
}

.requirement-section {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 32px;
  margin-bottom: 48px;
}

.requirement-section .section-title {
  font-size: 24px;
}

.requirement-section .section-intro {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 20px;
}

.requirement-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.requirement-item {
  background-color: #f4efe6;
  border-radius: 6px;
  padding: 18px 20px;
}

.requirement-name {
  font-size: 16px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 6px;
}

.requirement-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #2a3a4d;
}

.communication-section {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
}

.communication-section .section-intro {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 12px;
}

.communication-section .section-desc {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.communication-section a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
}

.communication-section a:hover {
  border-bottom-color: #d96c2f;
}

/* ---- 内页：服务专题 ---- */
.topic-lead-image {
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 40px;
}

.topic-lead-image img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

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

.topic-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 32px;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 28px;
}

.topic-text h2 {
  font-size: 24px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.topic-text p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 12px;
}

.topic-meta {
  font-size: 14px;
  color: #d96c2f;
  font-weight: 600;
  border-top: 1px solid #eee7dc;
  padding-top: 10px;
}

.topic-image {
  border-radius: 6px;
  overflow: hidden;
}

.topic-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.topic-guidance {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 32px;
  margin-bottom: 40px;
}

.topic-guidance h2 {
  font-size: 24px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 16px;
}

.topic-guidance p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 12px;
}

.topic-combination {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 32px;
  margin-bottom: 40px;
}

.topic-combination h2 {
  font-size: 24px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 16px;
}

.topic-combination p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.combination-list {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}

.combination-list li {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 6px;
}

.topic-combination a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
}

.topic-combination a:hover {
  border-bottom-color: #d96c2f;
}

.topic-cta {
  background-color: #0f1b2d;
  border-radius: 8px;
  padding: 32px;
}

.topic-cta h2 {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.topic-cta p {
  font-size: 15px;
  line-height: 1.8;
  color: #b8c2cf;
  margin-bottom: 12px;
}

.topic-cta a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #d96c2f;
  border-bottom: 2px solid transparent;
}

.topic-cta a:hover {
  border-bottom-color: #d96c2f;
}

/* ---- 内页：常见问题 ---- */
.content-detail {
  min-width: 0;
}

.faq-section h2 {
  font-size: 26px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid #d96c2f;
}

.faq-guide {
  background-color: #ffffff;
  border: 1px solid #e0d8cc;
  border-radius: 6px;
  padding: 32px;
  margin-top: 32px;
}

.faq-guide h2 {
  font-size: 24px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.faq-guide p {
  font-size: 15px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 16px;
}

.guide-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.guide-links a {
  display: inline-block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  color: #0f1b2d;
  border: 2px solid #0f1b2d;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.guide-links a:hover {
  background-color: #0f1b2d;
  color: #ffffff;
}

/* ============================================================
   Pages — 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  background-color: #f4efe6;
}

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

.error-code {
  font-family: "SF Mono", "Roboto Mono", "Courier New", monospace;
  font-size: 72px;
  font-weight: 800;
  color: #d96c2f;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  font-weight: 800;
  color: #0f1b2d;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4d;
  margin-bottom: 28px;
}

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

.error-link {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 6px;
  min-height: 44px;
  line-height: 1.5;
}

.error-link:first-child {
  background-color: #d96c2f;
  color: #ffffff;
  border: 2px solid #d96c2f;
}

.error-link:first-child:hover {
  background-color: #c05a22;
  border-color: #c05a22;
  color: #ffffff;
}

.error-link:last-child {
  background-color: transparent;
  color: #0f1b2d;
  border: 2px solid #0f1b2d;
}

.error-link:last-child:hover {
  background-color: #0f1b2d;
  color: #ffffff;
}

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

/* ---- 1024px ---- */
@media (max-width: 1024px) {
  .header-shell,
  .footer-shell,
  .hero-layout,
  .anchor-shell,
  .summary-layout,
  .method-head,
  .topics-head,
  .insights-head,
  .faq-head,
  .cta-card,
  .page-layout,
  .layout-shell {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-figure img {
    height: 300px;
  }

  .summary-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 32px;
  }

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

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

  .topic-figure {
    height: 140px;
  }

  .topic-card {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 24px;
  }

  .page-layout,
  .layout-shell,
  .sidebar-left .page-layout,
  .sidebar-left .layout-shell,
  .sidebar-left.page-layout,
  .sidebar-left.layout-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
  }
}

/* ---- 768px ---- */
@media (max-width: 768px) {
  .header-shell,
  .footer-shell,
  .hero-layout,
  .anchor-shell,
  .summary-layout,
  .method-head,
  .topics-head,
  .insights-head,
  .faq-head,
  .cta-card,
  .page-layout,
  .layout-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: #0f1b2d;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: block;
    visibility: visible;
    opacity: 1;
  }

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

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

  .site-nav .nav-list a {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 16px;
  }

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

  .site-nav .nav-list a.is-current {
    border-left: 3px solid #d96c2f;
    padding-left: 13px;
  }

  /* 首页 */
  #hero-heading {
    font-size: 40px;
  }

  .hero-section {
    padding: 48px 0;
  }

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

  .anchor-bar {
    top: 68px;
  }

  .summary-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .summary-aside {
    position: static;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

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

  .topic-figure {
    height: 180px;
  }

  .insight-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .insight-item img {
    width: 100%;
    height: 160px;
  }

  .cta-card {
    padding: 32px 24px;
  }

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

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

  /* 页脚 */
  .footer-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  /* 内页 */
  .page-layout,
  .layout-shell,
  .sidebar-left .page-layout,
  .sidebar-left .layout-shell,
  .sidebar-left.page-layout,
  .sidebar-left.layout-shell {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 24px;
  }

  /* 侧栏在手机上折叠到正文之前，且默认收起 */
  .sidebar-nav,
  .sidebar-tree,
  .sidebar-category {
    position: static;
    margin-bottom: 24px;
    padding: 0;
    border: none;
    background: transparent;
  }

  .sidebar-nav .sidebar-title,
  .sidebar-tree .sidebar-tree-title,
  .sidebar-category .sidebar-title,
  .sidebar-tree .tree-title {
    display: none;
  }

  .sidebar-nav .sidebar-list,
  .sidebar-tree .sidebar-tree-list,
  .sidebar-category .sidebar-list,
  .sidebar-tree .tree-list {
    display: none;
  }

  .sidebar-details,
  .mobile-sidebar-toggle {
    display: block;
    background-color: #ffffff;
    border: 1px solid #e0d8cc;
    border-radius: 6px;
    margin-bottom: 24px;
  }

  .sidebar-details summary,
  .mobile-sidebar-toggle summary {
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 700;
    color: #0f1b2d;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 44px;
  }

  .sidebar-details summary::-webkit-details-marker,
  .mobile-sidebar-toggle summary::-webkit-details-marker {
    display: none;
  }

  .sidebar-details summary::after,
  .mobile-sidebar-toggle summary::after {
    content: "+";
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: #d96c2f;
  }

  .sidebar-details[open] summary::after,
  .mobile-sidebar-toggle[open] summary::after {
    transform: translateY(-50%) rotate(45deg);
  }

  .sidebar-details .sidebar-list,
  .sidebar-details .sidebar-tree-list,
  .mobile-sidebar-toggle .sidebar-tree-list {
    display: flex;
    padding: 0 16px 16px;
  }

  .sidebar-details .sidebar-list a,
  .sidebar-details .sidebar-tree-list a,
  .mobile-sidebar-toggle .sidebar-tree-list a {
    padding: 10px 12px;
  }

  /* 内页正文 */
  .content-main,
  .page-content,
  .content-detail,
  .sidebar-main-content {
    min-width: 0;
  }

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

  .page-figure img,
  .method-hero-image,
  .content-figure img,
  .topic-lead-image img {
    height: 200px;
  }

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

  .topic-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .topic-image img {
    height: 200px;
  }
}

/* ---- 480px ---- */
@media (max-width: 480px) {
  .header-shell,
  .footer-shell,
  .hero-layout,
  .anchor-shell,
  .summary-layout,
  .method-head,
  .topics-head,
  .insights-head,
  .faq-head,
  .cta-card,
  .page-layout,
  .layout-shell {
    padding-left: 14px;
    padding-right: 14px;
  }

  .brand-logo {
    font-size: 20px;
  }

  #hero-heading {
    font-size: 32px;
  }

  .hero-slogan {
    font-size: 17px;
  }

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

  .hero-figure img {
    height: 200px;
  }

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

  .hero-actions .btn {
    width: 100%;
    text-align: center;
  }

  .anchor-shell a {
    padding: 8px 14px;
    font-size: 13px;
  }

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

  .method-step {
    padding: 22px 18px;
  }

  .topic-figure {
    height: 160px;
  }

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

  .cta-card {
    padding: 28px 18px;
  }

  #cta-title {
    font-size: 22px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-shell {
    padding-top: 36px;
  }

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

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

  .page-figure img,
  .method-hero-image,
  .content-figure img,
  .topic-lead-image img {
    height: 180px;
  }

  .service-item {
    padding: 20px 16px;
  }

  .meta-row {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .service-combination,
  .requirement-section,
  .communication-section,
  .topic-guidance,
  .topic-combination,
  .topic-cta,
  .faq-guide {
    padding: 20px 16px;
  }

  .method-step-item,
  .process-step-item {
    padding: 20px 16px;
  }

  .faq-item summary {
    padding: 14px 40px 14px 16px;
    font-size: 15px;
  }

  .faq-item p {
    padding: 0 16px 14px;
    font-size: 14px;
  }

  .standard-table th,
  .standard-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

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

  .topic-text h2 {
    font-size: 20px;
  }

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

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

  .error-link {
    text-align: center;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}