/* ==========================================================================
   qq吃瓜群 · 整站样式
   手工艺目录风：自然色彩（米白、灰褐、深绿），细腻描边与材质感
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base · 基础变量与全局重置
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #f5efe6;
  --color-bg-deep: #ece3d4;
  --color-primary: #3d4a3a;
  --color-primary-light: #4e5e4b;
  --color-accent: #8a7a5c;
  --color-accent-light: #a4937a;
  --color-white: #ffffff;
  --color-text: #222222;
  --color-text-light: #5a5a5a;
  --color-border: #d8cebd;
  --color-border-dark: #b8ab95;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;

  --header-height: 68px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;

  --line-height-base: 1.8;
  --line-height-heading: 1.4;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: var(--line-height-heading);
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: 0;
}

figure {
  margin: 0;
}

/* --------------------------------------------------------------------------
   Layout · 全局布局骨架
   -------------------------------------------------------------------------- */

/* 站点根容器 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

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

/* 统一容器 */
.header-inner,
.footer-inner,
.hero-section,
.content-image-section,
.services-overview,
.scenarios-section,
.process-summary,
.faq-preview,
.cta-section,
.breadcrumb-inner,
.layout-shell,
.page-layout,
.page-title-area,
.page-title-block,
.related-links,
.breadcrumb-wrap,
.faq-categories,
.faq-list,
.contact-guide,
.sitemap-content,
.sitemap-groups,
.site-note,
.sitemap-intro,
.error-section {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* --------------------------------------------------------------------------
   Components · 页头与导航
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
  white-space: nowrap;
}

.brand-name::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--color-accent);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: 2px;
}

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

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

.nav-list li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  border-color: var(--color-border);
  background-color: var(--color-bg);
}

.nav-link.is-current {
  color: var(--color-primary);
  border-color: var(--color-border-dark);
  background-color: var(--color-bg);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  gap: 5px;
}

.nav-toggle .toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Components · 面包屑
   -------------------------------------------------------------------------- */
.breadcrumb,
.breadcrumb-wrap {
  background-color: transparent;
  padding-top: 16px;
  padding-bottom: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a,
.breadcrumb-wrap a {
  color: var(--color-text-light);
}

.breadcrumb a:hover,
.breadcrumb-wrap a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  color: var(--color-border-dark);
  margin: 0 2px;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

.breadcrumb-wrap ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb-wrap li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-wrap li + li::before {
  content: "/";
  color: var(--color-border-dark);
}

/* --------------------------------------------------------------------------
   Components · 按钮
   -------------------------------------------------------------------------- */
.btn-primary,
.btn-secondary,
.btn-text,
.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  line-height: 1.4;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
  padding: 12px 28px;
  min-height: 44px;
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 12px 28px;
  min-height: 44px;
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-text {
  background: none;
  border: none;
  color: var(--color-primary);
  padding: 8px 4px;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-border-dark);
}

.btn-text:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

.btn-back {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
  padding: 12px 32px;
  min-height: 44px;
}

.btn-back:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Components · 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 0;
}

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

.footer-brand-link {
  display: inline-block;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-brand-link::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--color-accent-light);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: 2px;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 320px;
}

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

.footer-group h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 14px;
}

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

.footer-group ul a {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer-group ul a:hover {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* --------------------------------------------------------------------------
   Components · 相关链接
   -------------------------------------------------------------------------- */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  padding-bottom: 24px;
  border-top: 1px solid var(--color-border);
  margin-top: 48px;
}

.related-links-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-light);
  margin-right: 4px;
}

.related-links-item {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  background-color: var(--color-white);
}

.related-links-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-bg);
}

/* --------------------------------------------------------------------------
   Components · 首页 Hero
   -------------------------------------------------------------------------- */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.hero-content h1 {
  font-size: 34px;
  line-height: 1.35;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-lead {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: var(--line-height-base);
  margin-bottom: 28px;
  max-width: 480px;
}

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

.hero-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

.hero-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Components · 首页内容图
   -------------------------------------------------------------------------- */
.content-image-section {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
  padding-top: 48px;
  padding-bottom: 64px;
}

.content-image-block {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

.content-image-block img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.content-image-text h2 {
  margin-bottom: 16px;
}

.content-image-text p {
  color: var(--color-text-light);
  line-height: var(--line-height-base);
}

/* --------------------------------------------------------------------------
   Components · 首页区块通用
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 640px;
}

/* --------------------------------------------------------------------------
   Components · 服务卡片（首页 & 内页）
   -------------------------------------------------------------------------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.service-card:hover {
  border-color: var(--color-border-dark);
  box-shadow: 0 4px 16px rgba(61, 74, 58, 0.08);
}

.service-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.service-card h3 {
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.7;
  margin-bottom: 12px;
}

.card-link {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border-dark);
}

.card-link:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Components · 场景卡片
   -------------------------------------------------------------------------- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  border-left: 4px solid var(--color-accent);
  transition: border-color var(--transition-fast);
}

.scenario-card:hover {
  border-color: var(--color-border-dark);
}

.scenario-card h3 {
  margin-bottom: 8px;
}

.scenario-card p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   Components · 流程步骤
   -------------------------------------------------------------------------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 14px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Components · FAQ 预览与折叠
   -------------------------------------------------------------------------- */
.faq-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 16px;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.faq-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.faq-item p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

/* FAQ 折叠面板（内页） */
details.faq-item {
  padding: 0;
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  background-color: transparent;
}

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

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

details.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

details.faq-item .faq-answer {
  padding: 0 0 20px;
  color: var(--color-text-light);
}

details.faq-item .faq-answer p {
  margin-bottom: 10px;
}

details.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Components · CTA 区
   -------------------------------------------------------------------------- */
.cta-section {
  padding-top: 64px;
  padding-bottom: 64px;
}

.cta-inner {
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 48px 40px;
  text-align: left;
}

.cta-inner h2 {
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  margin-bottom: 24px;
}

.cta-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.cta-actions .btn-primary {
  background-color: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-primary);
}

.cta-actions .btn-primary:hover {
  background-color: var(--color-bg);
  border-color: var(--color-bg);
}

.cta-actions .btn-secondary {
  border-color: var(--color-white);
  color: var(--color-white);
}

.cta-actions .btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Pages · 内页统一骨架
   -------------------------------------------------------------------------- */
.inner-main {
  padding-top: 0;
  padding-bottom: 64px;
}

/* 页面标题区 */
.page-title-area,
.page-title-block {
  padding-top: 32px;
  padding-bottom: 8px;
}

.page-title-area p,
.page-title-block p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  line-height: 1.7;
  max-width: 720px;
}

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

.page-header .page-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0;
}

/* 内页面包屑（位于内容区内的） */
.page-content .breadcrumb,
.main-content .breadcrumb,
.inner-main > .breadcrumb {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 16px;
  padding-bottom: 0;
}

/* --------------------------------------------------------------------------
   Pages · 侧栏布局
   -------------------------------------------------------------------------- */

/* services / scenarios / process / sitemap 共用侧栏布局 */
.layout-shell,
.page-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-top: 32px;
}

/* 左侧栏变体：侧栏在前 */
.layout-shell.sidebar-left,
.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

/* 右侧栏变体（默认）：主内容在前，侧栏在后 */
.layout-shell.sidebar-right,
.page-layout.sidebar-right {
  grid-template-columns: minmax(0, 1fr) 240px;
}

/* sitemap 页：aside 是 body 直接子级 */
.page-layout.sidebar-left.sitemap-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

/* process 页：aside 与 main 是 body 直接子级 */
.sidebar-left .sidebar,
.sidebar-left .main-content {
  min-width: 0;
}

.sidebar-left .sidebar {
  grid-column: 1;
}

.sidebar-left .main-content {
  grid-column: 2;
}

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

.sidebar-card,
.sidebar-inner,
.aside-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-title,
.sidebar-inner h2,
.aside-card h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.sidebar-links li,
.aside-card ul li {
  margin-bottom: 4px;
}

.sidebar-links a,
.aside-card ul a {
  display: block;
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-links a:hover,
.aside-card ul a:hover {
  background-color: var(--color-bg);
  border-left-color: var(--color-accent);
  color: var(--color-primary);
}

.sidebar-note {
  background-color: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

.sidebar-note h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.sidebar-note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Pages · services.html
   -------------------------------------------------------------------------- */
.page-content {
  min-width: 0;
}

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

.service-list .service-card {
  padding: 28px;
}

.service-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.service-card-header .service-number {
  margin-bottom: 0;
  flex-shrink: 0;
}

.service-name {
  font-size: 20px;
}

.service-card-body .service-desc {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.deliverables {
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.deliverables p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-light);
}

.target-audience {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

.target-audience strong {
  color: var(--color-text);
  font-weight: 600;
}

/* 服务列表下方配图 */
.service-list .content-image {
  margin-top: 8px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

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

.service-list .content-image figcaption {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 交付标准 */
.delivery-standards {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.delivery-standards h2 {
  margin-bottom: 8px;
}

.standards-intro {
  color: var(--color-text-light);
  margin-bottom: 24px;
}

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

.standards-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.standards-list h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.standards-list p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 选择建议 */
.selection-guide {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.selection-guide h2 {
  margin-bottom: 12px;
}

.selection-guide p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   Pages · scenarios.html
   -------------------------------------------------------------------------- */
.scenario-nav h2 {
  font-size: 16px;
  font-weight: 600;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.scenario-nav ul li {
  margin-bottom: 4px;
}

.scenario-nav ul a {
  display: block;
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.scenario-nav ul a:hover {
  background-color: var(--color-bg);
  border-left-color: var(--color-accent);
  color: var(--color-primary);
}

.scenario-block {
  margin-bottom: 48px;
}

.scenario-block > h2 {
  font-size: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.scenario-text h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.scenario-text p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}

.content-figure {
  margin: 32px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

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

.content-figure figcaption {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 对比表 */
.comparison-section {
  margin-top: 48px;
}

.comparison-section h2 {
  margin-bottom: 20px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.comparison-table th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

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

.comparison-table tbody tr:hover {
  background-color: var(--color-bg);
}

/* 场景引导 */
.scenario-guide {
  margin-top: 48px;
  background-color: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.scenario-guide h2 {
  margin-bottom: 12px;
}

.scenario-guide p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.scenario-guide a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-right: 16px;
}

/* --------------------------------------------------------------------------
   Pages · process.html
   -------------------------------------------------------------------------- */
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.process-step {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.process-step:last-child {
  border-bottom: none;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 18px;
  font-weight: 600;
  border-radius: 50%;
  margin-top: 4px;
}

.step-body h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-body p {
  color: var(--color-text-light);
  margin-bottom: 8px;
  line-height: 1.7;
}

.step-deliverable {
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.time-note {
  margin-top: 40px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.time-note h2 {
  margin-bottom: 12px;
}

.time-note p {
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.caution {
  margin-top: 40px;
}

.caution h2 {
  margin-bottom: 16px;
}

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

.caution-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  border-left: 4px solid var(--color-accent);
}

.caution-list li::before {
  content: "·";
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  margin-right: 8px;
}

/* --------------------------------------------------------------------------
   Pages · faq.html
   -------------------------------------------------------------------------- */
.faq-categories {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  padding-bottom: 24px;
}

.category-link {
  display: inline-block;
  padding: 8px 20px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.category-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.faq-group-title {
  font-size: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 8px;
}

.faq-list {
  padding-top: 0;
}

.faq-list .content-image {
  margin-top: 32px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

.faq-list .content-image img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.faq-list .content-image figcaption {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.contact-guide {
  margin-top: 48px;
  background-color: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.contact-guide h2 {
  margin-bottom: 16px;
}

.contact-guide p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.contact-guide a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-right: 16px;
}

.contact-guide .guide-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Pages · about.html
   -------------------------------------------------------------------------- */
.page-lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 720px;
}

.intro-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 32px;
  padding-bottom: 48px;
}

.intro-text h2 {
  margin-bottom: 16px;
}

.intro-text p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.intro-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

.intro-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.intro-image figcaption {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.capabilities-section {
  padding-top: 32px;
  padding-bottom: 48px;
}

.capabilities-section h2 {
  margin-bottom: 8px;
}

.section-desc {
  color: var(--color-text-light);
  margin-bottom: 28px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.capability-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.capability-item h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.capability-item p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

.assurance-section {
  padding-top: 32px;
  padding-bottom: 48px;
}

.assurance-section h2 {
  margin-bottom: 24px;
}

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

.assurance-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  border-top: 4px solid var(--color-primary);
}

.assurance-list h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.assurance-list p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.values-section {
  padding-top: 32px;
  padding-bottom: 48px;
}

.values-section h2 {
  margin-bottom: 24px;
}

.values-section blockquote {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.values-section blockquote p {
  font-size: var(--font-size-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.7;
}

.values-section > p {
  color: var(--color-text-light);
  line-height: 1.8;
}

.related-links-section {
  padding-top: 32px;
  padding-bottom: 32px;
  border-top: 1px solid var(--color-border);
}

.related-links-section h2 {
  margin-bottom: 8px;
}

.related-links-section > p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.related-links-section .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  border-top: none;
  margin-top: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.related-links-section .related-links li {
  margin: 0;
}

.related-links-section .related-links a {
  display: inline-block;
  padding: 8px 18px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

.related-links-section .related-links a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg);
}

/* --------------------------------------------------------------------------
   Pages · sitemap.html
   -------------------------------------------------------------------------- */
.sitemap-content {
  padding-top: 24px;
}

.sitemap-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.sitemap-text h2 {
  margin-bottom: 12px;
}

.sitemap-text p {
  color: var(--color-text-light);
  line-height: 1.8;
}

.sitemap-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-deep);
}

.sitemap-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.sitemap-figure figcaption {
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.sitemap-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.sitemap-group {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-group h2 {
  font-size: 16px;
  color: var(--color-primary);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 14px;
}

.sitemap-list li {
  margin-bottom: 6px;
}

.sitemap-list a {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.sitemap-list a:hover {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-note {
  background-color: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.site-note h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.site-note p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   Pages · 404.html
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-section {
  text-align: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-text-light);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   Responsive · 响应式
   -------------------------------------------------------------------------- */

/* 平板：≤ 1024px */
@media (max-width: 1024px) {
  .hero-section {
    gap: 32px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-media img {
    height: 320px;
  }

  .content-image-section {
    gap: 32px;
  }

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

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

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

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

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

  .layout-shell,
  .page-layout,
  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 32px;
  }
}

/* 手机：≤ 768px */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --header-height: 60px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 22px;
  }

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

  .site-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px var(--container-padding) 16px;
    gap: 2px;
    z-index: 99;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .nav-link.is-current {
    background-color: var(--color-bg);
  }

  /* 首页 hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .hero-content h1 {
    font-size: 26px;
  }

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

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

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

  /* 首页内容图 */
  .content-image-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 40px;
  }

  .content-image-block img {
    height: 220px;
  }

  /* 服务卡片 */
  .service-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 场景卡片 */
  .scenario-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  /* FAQ 预览 */
  .faq-preview-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

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

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

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

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  /* 内页布局：侧栏在正文之后 */
  .layout-shell,
  .page-layout,
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left,
  .page-layout.sidebar-left.sitemap-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 16px;
  }

  /* 手机端：主内容在前，侧栏在后 */
  .layout-shell .page-content,
  .layout-shell .main-content,
  .page-layout .page-content,
  .page-layout .main-content {
    grid-column: 1;
    grid-row: 1;
  }

  .layout-shell .page-sidebar,
  .layout-shell .sidebar,
  .page-layout .page-sidebar,
  .page-layout .sitemap-aside {
    grid-column: 1;
    grid-row: 2;
    margin-top: 32px;
  }

  /* 侧栏卡片在手机端展开为横向 */
  .sidebar-card,
  .sidebar-inner,
  .aside-card {
    padding: 20px;
  }

  /* 服务页 */
  .service-list .service-card {
    padding: 20px;
  }

  .service-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

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

  /* 场景页 */
  .scenario-block {
    margin-bottom: 32px;
  }

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

  .comparison-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px;
  }

  /* 流程页 */
  .process-step {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 16px;
    padding: 20px 0;
  }

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

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

  /* FAQ 页 */
  .faq-categories {
    gap: 8px;
    padding-top: 16px;
  }

  .category-link {
    padding: 8px 14px;
    font-size: 13px;
  }

  .faq-list .content-image img {
    height: 200px;
  }

  .contact-guide {
    padding: 24px 20px;
  }

  /* 关于页 */
  .intro-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .intro-image img {
    height: 220px;
  }

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

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

  /* 站点地图页 */
  .sitemap-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  /* 404 */
  .error-code {
    font-size: 56px;
  }

  .error-section h1 {
    font-size: 24px;
  }

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

  /* 面包屑 */
  .breadcrumb,
  .breadcrumb-wrap {
    padding-top: 12px;
  }
}

/* 小屏手机：≤ 480px */
@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .hero-content h1 {
    font-size: 24px;
  }

  .process-step {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .step-number {
    margin-bottom: 4px;
  }
}

/* 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;
  }
}