/* ==========================================================================
   51吃瓜网今日爆料 · 全站样式表
   工艺品牌风：暖灰背景 · 陶土橙强调 · 深蓝编号体系
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base · 基础变量与重置
   -------------------------------------------------------------------------- */
:root {
  --bg-warm: #F5F1EA;
  --bg-white: #FFFFFF;
  --ink-navy: #1B3A4B;
  --ink-body: #2A2A2A;
  --accent-clay: #C47A3A;
  --border-line: #D8D2C6;
  --text-light: #6B6B6B;
  --max-shell: 1240px;
  --max-content: 720px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-soft: 0 2px 8px rgba(27, 58, 75, 0.06);
  --shadow-lift: 0 6px 18px rgba(27, 58, 75, 0.10);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-body);
  background-color: var(--bg-warm);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--ink-navy);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  color: var(--ink-navy);
  line-height: 1.3;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  color: var(--ink-body);
}

/* --------------------------------------------------------------------------
   Layout · 全站布局骨架
   -------------------------------------------------------------------------- */

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

/* 页头 */
.site-header {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-line);
}

.header-top {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 18px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-navy);
  letter-spacing: 0.5px;
}

.brand-tagline {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.4;
}

/* 主导航 */
.main-nav {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-list {
  display: flex;
  gap: 4px;
  padding: 12px 0 0;
  border-top: 1px solid var(--border-line);
}

.nav-list li a {
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-navy);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--accent-clay);
  background-color: rgba(196, 122, 58, 0.08);
}

.nav-list li a.is-current {
  color: var(--accent-clay);
  background-color: rgba(196, 122, 58, 0.12);
  font-weight: 700;
}

/* 主内容区 */
.site-main {
  flex: 1;
  width: 100%;
}

.site-main.home-main {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 0 24px;
}

.site-main.inner-main {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--ink-navy);
}

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

.breadcrumb-sep {
  color: var(--border-line);
}

.breadcrumb-current {
  color: var(--text-light);
}

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

.page-title {
  font-size: 32px;
  line-height: 1.3;
}

.page-head {
  margin-bottom: 40px;
}

.page-heading {
  margin-bottom: 40px;
}

.page-intro {
  font-size: 17px;
  line-height: 1.8;
  max-width: var(--max-content);
  color: var(--ink-body);
}

/* 页脚 */
.site-footer {
  background-color: var(--ink-navy);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.site-footer .footer-column {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand .brand-name {
  color: #FFFFFF;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.6;
}

.footer-column p,
.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.7;
}

.footer-column a:hover {
  color: #E8B88A;
}

/* --------------------------------------------------------------------------
   Components · 通用组件
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--accent-clay);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, transform 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: #A9652E;
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  background-color: transparent;
  color: var(--ink-navy);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--accent-clay);
  color: var(--accent-clay);
  transform: translateY(-2px);
}

/* 卡片通用 hover 上浮 */
.service-card,
.problem-card,
.service-item,
.step-card,
.guide-card,
.role-card,
.principle-card,
.boundary-card,
.tip-card,
.related-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover,
.problem-card:hover,
.service-item:hover,
.step-card:hover,
.guide-card:hover,
.role-card:hover,
.principle-card:hover,
.boundary-card:hover,
.tip-card:hover,
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

/* FAQ 手风琴 */
details.faq-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

details.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-navy);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

details.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--accent-clay);
  transition: transform 0.2s ease;
}

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

details.faq-item summary:hover {
  color: var(--accent-clay);
}

details.faq-item .faq-answer {
  padding: 0 20px 18px;
  border-top: 1px solid var(--border-line);
}

details.faq-item .faq-answer p {
  padding-top: 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-body);
}

/* 首页 FAQ 特殊：无 .faq-answer 容器，直接 p */
.faq-teaser details.faq-item p {
  padding: 0 20px 18px;
  border-top: 1px solid var(--border-line);
  padding-top: 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-body);
}

/* 相关主题链接卡片 */
.related-card {
  display: block;
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 20px;
}

.related-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.related-title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-navy);
  margin-bottom: 6px;
}

.related-desc {
  display: block;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* 底部横向相关链接 */
.related-links {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border-line);
}

.related-links-label {
  font-size: 14px;
  color: var(--text-light);
  white-space: nowrap;
}

.related-links-item {
  font-size: 14px;
  color: var(--ink-navy);
  padding: 4px 0;
}

.related-links-item:hover {
  color: var(--accent-clay);
}

/* 图片容器 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

figcaption {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
  margin-top: 8px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Pages · 首页
   -------------------------------------------------------------------------- */

/* Hero 区：左服务卡片流，右合作引导 */
.hero {
  padding: 48px 0 24px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.service-stream .section-title {
  font-size: 28px;
  margin-bottom: 24px;
}

.service-card-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.service-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-clay);
}

.service-card h3 {
  font-size: 17px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
}

.service-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-navy);
  align-self: flex-start;
}

.service-card a:hover {
  color: var(--accent-clay);
}

/* 右侧合作引导 */
.cooperation-guide {
  background-color: var(--ink-navy);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  color: #FFFFFF;
}

.cooperation-guide h2 {
  color: #FFFFFF;
  font-size: 22px;
  margin-bottom: 16px;
}

.cooperation-guide p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 24px;
}

.cooperation-guide .btn-primary {
  background-color: var(--accent-clay);
}

/* Hero 主图 */
.content-media-primary {
  margin-top: 40px;
}

.content-media-primary img {
  height: 320px;
  object-fit: cover;
}

/* 服务定位与价值 */
.positioning {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
}

.positioning-text h2 {
  margin-bottom: 20px;
}

.positioning-text p {
  margin-bottom: 16px;
  line-height: 1.8;
}

.positioning-text strong {
  color: var(--ink-navy);
  font-weight: 700;
}

.positioning-image img {
  height: 280px;
  object-fit: cover;
}

/* 核心问题与解决路径 */
.problems {
  padding: 48px 0;
}

.problems > h2 {
  text-align: center;
  margin-bottom: 32px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.problem-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.problem-card h3 {
  font-size: 17px;
}

.problem-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  flex: 1;
}

.problem-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-clay);
  align-self: flex-start;
}

/* 工作流程概览 */
.process {
  padding: 48px 0;
}

.process > h2 {
  text-align: center;
  margin-bottom: 32px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.process .step {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
}

.process .step-number {
  display: inline-block;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-clay);
  margin-bottom: 12px;
}

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

.process .step p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.process > .btn-secondary {
  display: block;
  margin: 0 auto;
  width: fit-content;
}

/* 服务矩阵索引 */
.services-index {
  padding: 48px 0;
}

.services-index > h2 {
  text-align: center;
  margin-bottom: 32px;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.service-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-code {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-clay);
}

.service-item h3 {
  font-size: 17px;
}

.service-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
}

.service-item a {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-navy);
  align-self: flex-start;
}

.service-item a:hover {
  color: var(--accent-clay);
}

/* 常见问题精选 */
.faq-teaser {
  padding: 48px 0;
}

.faq-teaser > h2 {
  text-align: center;
  margin-bottom: 32px;
}

.faq-teaser .faq-item {
  max-width: var(--max-content);
  margin-left: auto;
  margin-right: auto;
}

.faq-teaser > .btn-secondary {
  display: block;
  margin: 24px auto 0;
  width: fit-content;
}

/* 合作引导 */
.cooperation-cta {
  background-color: var(--ink-navy);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin: 48px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cta-content h2 {
  color: #FFFFFF;
  font-size: 24px;
  margin-bottom: 12px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 600px;
}

.cta-content .btn-primary {
  background-color: var(--accent-clay);
}

.boundary-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 16px;
}

/* --------------------------------------------------------------------------
   Pages · 服务能力
   -------------------------------------------------------------------------- */

/* 服务矩阵总览 */
.services-overview {
  margin-bottom: 56px;
}

.services-overview > h2 {
  margin-bottom: 12px;
}

.services-overview > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

.service-matrix {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 20px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.service-no {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-clay);
}

.service-brief h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.service-brief p {
  font-size: 14px;
  color: var(--text-light);
}

.service-tag {
  font-size: 13px;
  color: var(--ink-navy);
  background-color: rgba(196, 122, 58, 0.10);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  white-space: nowrap;
}

/* 单项服务说明 */
.service-details {
  margin-bottom: 56px;
}

.service-details > h2 {
  margin-bottom: 32px;
}

.service-detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.detail-text h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.detail-text p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.detail-media img {
  height: 220px;
  object-fit: cover;
}

/* 适用场景与边界 */
.boundary-cards {
  margin-bottom: 56px;
}

.boundary-cards > h2 {
  margin-bottom: 32px;
}

.boundary-cards .boundary-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
}

.boundary-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.boundary-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-light);
}

/* 相关主题 */
.related {
  margin-top: 56px;
}

.related > h2 {
  margin-bottom: 24px;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

/* --------------------------------------------------------------------------
   Pages · 操作指南
   -------------------------------------------------------------------------- */

/* 纵向时间线 */
.stage-flow {
  margin-bottom: 56px;
}

.stage-flow > h2 {
  margin-bottom: 12px;
}

.stage-flow > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

.stage-timeline {
  position: relative;
  padding-left: 0;
}

.stage-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 24px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  position: relative;
}

.stage-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-clay);
  line-height: 1;
  padding-top: 4px;
}

.stage-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.stage-content p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.stage-task {
  font-size: 14px;
  color: var(--text-light);
}

.stage-task strong {
  color: var(--ink-navy);
  font-weight: 600;
}

.stage-figure {
  margin-top: 32px;
}

.stage-figure img {
  height: 240px;
  object-fit: cover;
}

/* 客户准备清单 */
.preparation {
  margin-bottom: 56px;
}

.preparation > h2 {
  margin-bottom: 12px;
}

.preparation > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

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

.checklist-column {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.checklist-column h3 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--accent-clay);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-clay);
}

/* 操作提示 */
.tips {
  margin-bottom: 56px;
}

.tips > h2 {
  margin-bottom: 32px;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tip-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tip-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.tip-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* 相关主题（内页专用） */
.related-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* --------------------------------------------------------------------------
   Pages · 常见问题
   -------------------------------------------------------------------------- */

/* 分类锚点 */
.category-anchor {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.category-anchor a {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-navy);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.category-anchor a:hover {
  border-color: var(--accent-clay);
  color: var(--accent-clay);
}

/* FAQ 分类区块 */
.faq-category {
  margin-bottom: 48px;
}

.faq-category > h2 {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-line);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 支持说明 */
.support-note {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
}

.support-note p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 12px;
}

.support-note a {
  color: var(--accent-clay);
  font-weight: 600;
  margin-right: 16px;
  display: inline-block;
}

.support-note a:hover {
  text-decoration: underline;
}

/* 相关主题网格 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* --------------------------------------------------------------------------
   Pages · 合作方式
   -------------------------------------------------------------------------- */

/* 合作流程横排 */
.cooperation-steps {
  margin-bottom: 56px;
}

.cooperation-steps > h2 {
  margin-bottom: 12px;
}

.cooperation-steps > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.step-card .step-number {
  display: inline-block;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-clay);
  margin-bottom: 12px;
}

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

.step-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.process-figure {
  margin-top: 32px;
}

.process-figure img {
  height: 240px;
  object-fit: cover;
}

/* 需求对接 */
.contact-guide {
  margin-bottom: 56px;
}

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

.contact-guide > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

.guide-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guide-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.guide-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.guide-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* 准备清单 */
.checklist .checklist-column {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.checklist .checklist-column li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
  margin-bottom: 12px;
}

.checklist .checklist-column li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-clay);
}

/* 双方职责 */
.roles {
  margin-bottom: 56px;
}

.roles > h2 {
  margin-bottom: 12px;
}

.roles > p {
  margin-bottom: 32px;
  max-width: var(--max-content);
}

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

.role-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
}

.role-card h3 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--accent-clay);
}

.role-card ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.role-card li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.role-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-clay);
}

/* --------------------------------------------------------------------------
   Pages · 关于我们
   -------------------------------------------------------------------------- */

.page-layout {
  max-width: var(--max-content);
}

/* 机构定位 */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 56px;
}

.intro-copy h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.intro-copy p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.intro-media img {
  height: 260px;
  object-fit: cover;
}

/* 工作原则 */
.principles {
  margin-bottom: 56px;
}

.principles > h2 {
  margin-bottom: 32px;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.principle-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.principle-number {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-clay);
  display: block;
  margin-bottom: 8px;
}

.principle-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* 业务边界 */
.boundary {
  margin-bottom: 56px;
}

.boundary > h2 {
  margin-bottom: 32px;
}

.boundary-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.boundary-block {
  background-color: var(--bg-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.boundary-block h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.boundary-block p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-light);
}

/* --------------------------------------------------------------------------
   Pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 80px 24px;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-section {
  text-align: center;
  max-width: 520px;
}

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

.error-section h1 {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.error-action {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.error-home-btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--accent-clay);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.error-home-btn:hover {
  background-color: #A9652E;
  color: #FFFFFF;
}

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

/* 平板 768-1024px */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cooperation-guide {
    order: -1;
  }

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

  .service-detail-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

  .related-links {
    grid-template-columns: 1fr;
  }
}

/* 手机 390px */
@media (max-width: 640px) {
  .header-top {
    padding: 14px 16px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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

  .nav-list {
    flex-wrap: wrap;
    gap: 2px;
    padding: 10px 0 0;
  }

  .nav-list li a {
    padding: 8px 12px;
    font-size: 14px;
  }

  .site-main.home-main,
  .site-main.inner-main {
    padding: 24px 16px 48px;
  }

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

  .page-intro {
    font-size: 16px;
  }

  /* 首页 */
  .hero {
    padding: 32px 0 16px;
  }

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

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

  .cooperation-guide {
    padding: 28px 20px;
  }

  .positioning {
    padding: 32px 0;
  }

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

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

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

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

  .cooperation-cta {
    padding: 32px 20px;
  }

  /* 服务能力 */
  .service-row {
    grid-template-columns: 48px 1fr;
    gap: 12px;
    padding: 16px;
  }

  .service-tag {
    grid-column: 2;
    justify-self: start;
  }

  .detail-media img {
    height: 180px;
  }

  /* 操作指南 */
  .stage-item {
    grid-template-columns: 48px 1fr;
    gap: 16px;
    padding: 16px;
  }

  .stage-number {
    font-size: 22px;
  }

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

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

  /* 常见问题 */
  .category-anchor {
    gap: 8px;
  }

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

  /* 合作方式 */
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .guide-cards {
    grid-template-columns: 1fr;
  }

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

  /* 关于我们 */
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .intro-media img {
    height: 200px;
  }

  /* 页脚 */
  .site-footer .footer-column {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  /* 相关链接 */
  .related-links {
    flex-wrap: wrap;
    gap: 8px;
  }

  .related-links-label {
    width: 100%;
  }

  .related-cards,
  .related-grid,
  .related-links {
    grid-template-columns: 1fr;
  }

  /* 404 */
  .error-main {
    padding: 48px 16px;
  }

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

/* 小手机 390px 以下 */
@media (max-width: 390px) {
  .nav-list li a {
    padding: 6px 10px;
    font-size: 13px;
  }

  .service-row {
    grid-template-columns: 40px 1fr;
  }

  .stage-item {
    grid-template-columns: 40px 1fr;
  }
}