/* ============================================================
   momoqu.com.cn · 51吃瓜网张津瑜 企业官网
   全站统一样式表
   ============================================================ */

/* ============================================================
   Base
   ============================================================ */
:root {
  --color-primary: #1F2937;
  --color-bg: #F8FAFC;
  --color-accent: #3B82F6;
  --color-border: #D1D5DB;
  --color-white: #FFFFFF;
  --color-text: #374151;
  --color-text-light: #6B7280;
  --color-footer-bg: #111827;
  --color-footer-text: #9CA3AF;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(31, 41, 55, 0.06);
  --shadow-md: 0 4px 12px rgba(31, 41, 55, 0.08);
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: #2563EB;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  color: var(--color-primary);
  line-height: 1.4;
}

h1 {
  font-size: 28px;
  font-weight: 700;
}

h2 {
  font-size: 22px;
  font-weight: 600;
}

h3 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 无障碍隐藏 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Layout — 全站统一骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.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: 68px;
}

.brand {
  flex-shrink: 0;
}

.brand a {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-tag {
  font-size: 12px;
  color: var(--color-text-light);
  letter-spacing: 0.02em;
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.nav-list li a:hover {
  color: var(--color-accent);
  background-color: rgba(59, 130, 246, 0.06);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  background-color: rgba(59, 130, 246, 0.1);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

/* 面包屑 */
.breadcrumb {
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-light);
}

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

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

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

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--color-border);
}

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

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

.breadcrumb-sep {
  margin: 0 6px;
  color: var(--color-border);
}

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

/* 页脚 */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 64px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.7;
}

.footer-col h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 14px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: var(--color-footer-text);
  transition: color var(--transition);
}

.footer-col ul a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
}

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

.footer-links a {
  color: var(--color-footer-text);
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--color-white);
}

/* ============================================================
   Components — 通用组件
   ============================================================ */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background-color: #2563EB;
  color: var(--color-white);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-primary);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 区块头部 */
.section-head {
  margin-bottom: 24px;
}

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

.section-head p {
  color: var(--color-text-light);
  font-size: 15px;
}

/* 区块链接 */
.section-link {
  margin-top: 20px;
}

.section-link a {
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.section-link a::after {
  content: "→";
  transition: transform var(--transition);
}

.section-link a:hover::after {
  transform: translateX(4px);
}

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

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-light);
  transition: transform var(--transition);
}

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

.faq-item summary:hover {
  background-color: rgba(59, 130, 246, 0.04);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* 相关链接 */
.related-links {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: border-color var(--transition), background-color var(--transition);
}

.related-links-item:hover {
  border-color: var(--color-accent);
  background-color: rgba(59, 130, 246, 0.04);
}

/* 侧边栏 */
.sidebar {
  min-width: 0;
}

.sidebar-widget,
.sidebar-card,
.sidebar-block,
.side-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-widget h2,
.sidebar-card h2,
.sidebar-block h2,
.side-card h2 {
  font-size: 17px;
  margin-bottom: 14px;
}

.sidebar-widget p,
.sidebar-card p,
.sidebar-block p,
.side-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

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

.sidebar-links a {
  font-size: 14px;
  color: var(--color-text);
  display: block;
  padding: 6px 0;
  transition: color var(--transition), padding-left var(--transition);
}

.sidebar-links a:hover {
  color: var(--color-accent);
  padding-left: 6px;
}

.sidebar-link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  gap: 4px;
}

.sidebar-link::after {
  content: "→";
  transition: transform var(--transition);
}

.sidebar-link:hover::after {
  transform: translateX(4px);
}

/* ============================================================
   Components — 首页
   ============================================================ */
/* Hero */
.hero {
  background-color: var(--color-primary);
  padding: 64px 0;
}

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

.hero-content h1 {
  color: var(--color-white);
  margin-bottom: 16px;
  font-size: 32px;
}

.hero-desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions .btn-primary {
  background-color: var(--color-accent);
}

.hero-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-white);
}

.hero-actions .btn-outline:hover {
  border-color: var(--color-white);
  color: var(--color-white);
}

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* 首页布局 */
.home-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 24px;
  align-items: start;
}

.main-col {
  min-width: 0;
}

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

/* 服务矩阵概览 */
.services-overview,
.process-preview,
.faq-preview,
.about-compliance {
  margin-bottom: 48px;
}

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

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

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: rgba(59, 130, 246, 0.1);
  margin-bottom: 14px;
  font-size: 20px;
}

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

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

/* 合作流程预览 */
.process-preview .process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.process-preview .step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
}

.step-num,
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.process-preview .step-item h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.process-preview .step-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

.process-media img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-top: 24px;
}

/* 首页侧栏 */
.home-sidebar {
  min-width: 0;
}

.solution-mini-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.mini-card {
  display: block;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: border-color var(--transition), background-color var(--transition);
}

.mini-card:hover {
  border-color: var(--color-accent);
  background-color: rgba(59, 130, 246, 0.04);
}

.mini-card-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.mini-card-desc {
  display: block;
  font-size: 13px;
  color: var(--color-text-light);
}

.compliance-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: rgba(59, 130, 246, 0.1);
  margin-bottom: 12px;
}

.compliance-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--color-accent);
}

.deep-links ul li {
  margin-bottom: 8px;
}

.deep-links ul a {
  font-size: 14px;
  color: var(--color-text);
  display: block;
  padding: 4px 0;
}

.deep-links ul a:hover {
  color: var(--color-accent);
}

/* 首页关于摘要 */
.about-summary p {
  font-size: 15px;
  margin-bottom: 16px;
}

.principle-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text);
}

.principle-list li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ============================================================
   Components — 内页通用
   ============================================================ */
.page-layout,
.layout-shell {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  padding-top: 24px;
  padding-bottom: 24px;
  align-items: start;
}

.inner-main {
  min-width: 0;
}

.page-header {
  margin-bottom: 8px;
}

.page-title {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

/* 内页区块 */
.section-block,
.section {
  margin-bottom: 48px;
}

/* 图片容器 */
figure {
  margin: 0;
}

.overview-figure,
.version-figure,
.about-figure,
.process-figure {
  margin-bottom: 24px;
}

.overview-figure img,
.version-figure img,
.about-figure img,
.process-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 2px 0;
}

.content-media {
  margin-bottom: 20px;
}

.content-media-inline {
  margin-bottom: 20px;
}

.content-media-inline img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* ============================================================
   Components — 服务矩阵页
   ============================================================ */
.service-direction-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

.service-direction-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-direction-card .service-icon {
  margin-bottom: 14px;
}

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

.service-direction-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.service-direction-card .scene-label {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: 8px;
}

.icon-doc,
.icon-folder,
.icon-shield,
.icon-eye {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
}

/* 版本切换 */
.version-switcher {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.version-tab {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.version-tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.version-tab.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.version-panel {
  display: none;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.version-panel.is-active {
  display: block;
}

.version-panel h3 {
  margin-bottom: 12px;
}

.version-panel p {
  font-size: 14px;
  margin-bottom: 12px;
}

.version-panel .panel-note {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent);
}

.text-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.text-link::after {
  content: "→";
  transition: transform var(--transition);
}

.text-link:hover::after {
  transform: translateX(4px);
}

.change-entry {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text);
}

/* 对比表格 */
.compare-section {
  margin-bottom: 48px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.compare-table th,
.compare-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.compare-table thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  white-space: nowrap;
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody th {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.compare-table tbody td {
  color: var(--color-text);
}

/* 选择建议 */
.advice-section {
  margin-bottom: 48px;
}

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

.advice-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.advice-scene {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

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

/* 侧栏锚点 */
.sidebar-anchors ul li {
  margin-bottom: 8px;
}

.sidebar-anchors ul a {
  font-size: 14px;
  color: var(--color-text);
  display: block;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-bg);
  transition: color var(--transition), padding-left var(--transition);
}

.sidebar-anchors ul a:hover {
  color: var(--color-accent);
  padding-left: 6px;
}

/* ============================================================
   Components — 解决方案页
   ============================================================ */
.audience-cards {
  margin-bottom: 48px;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.audience-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.audience-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.audience-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.audience-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.audience-card a::after {
  content: "↓";
  transition: transform var(--transition);
}

.audience-card a:hover::after {
  transform: translateY(3px);
}

/* 方案条目 */
.solution-entry {
  scroll-margin-top: 80px;
}

.solution-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  align-items: start;
}

.solution-image figure {
  margin: 0;
}

.solution-image img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.solution-content h3 {
  margin-bottom: 8px;
  font-size: 16px;
}

.solution-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.solution-content ul {
  margin-bottom: 12px;
  padding-left: 0;
}

.solution-content ul li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.solution-content ul li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* 选择建议汇总 */
.selection-advice .advice-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.selection-advice .advice-list h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.selection-advice .advice-list p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ============================================================
   Components — 合作流程页
   ============================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.steps-grid .step-item {
  min-width: 0;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
}

.steps-grid .step-item h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.steps-grid .step-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 需求自查清单 */
.checklist-section {
  margin-bottom: 48px;
}

.checklist-section > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition);
  font-size: 14px;
  color: var(--color-text);
}

.check-item:hover {
  border-color: var(--color-accent);
}

.check-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.checklist-tip {
  font-size: 14px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  padding: 10px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 发起合作 */
.initiate-paths {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.path-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.path-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.path-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.path-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

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

/* ============================================================
   Components — FAQ 页
   ============================================================ */
.faq-group {
  margin-bottom: 48px;
}

.faq-group h2 {
  margin-bottom: 20px;
}

/* ============================================================
   Components — 关于页
   ============================================================ */
.about-company,
.about-principles,
.about-compliance {
  margin-bottom: 48px;
}

.about-company > p {
  font-size: 15px;
  margin-bottom: 16px;
}

.about-points {
  margin-top: 20px;
}

.about-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text);
}

.about-points li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.principle-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 13px;
  color: var(--color-text-light);
}

.about-compliance > p {
  font-size: 15px;
  margin-bottom: 16px;
}

.compliance-list {
  margin-bottom: 16px;
}

.compliance-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.compliance-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   Components — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
}

.error-container {
  max-width: 600px;
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-container h1 {
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 28px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.error-btn:hover {
  background-color: #2563EB;
  color: var(--color-white);
}

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

.error-links a {
  font-size: 14px;
  color: var(--color-accent);
}

/* ============================================================
   Responsive — 桌面
   ============================================================ */
@media (min-width: 1200px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
}

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

  .hero-media img {
    height: 280px;
  }

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

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

  .solution-block {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

/* ============================================================
   Responsive — 手机（≤768px）
   ============================================================ */
@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 导航折叠 */
  .menu-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    z-index: 99;
    box-shadow: var(--shadow-md);
  }

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

  .nav-list li a {
    padding: 12px 24px;
    border-radius: 0;
  }

  .nav-list li a.is-current {
    background-color: rgba(59, 130, 246, 0.08);
  }

  /* 首页布局改为单列 */
  .home-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 32px;
  }

  .hero {
    padding: 40px 0;
  }

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

  .hero-media img {
    height: 220px;
  }

  /* 内页布局改为单列 */
  .page-layout,
  .layout-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 16px;
  }

  .page-title {
    margin-bottom: 24px;
  }

  /* 卡片网格降列 */
  .service-cards,
  .service-direction-grid {
    grid-template-columns: 1fr;
  }

  .process-preview .process-steps,
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

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

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

  /* 对比表格降级为卡片 */
  .table-wrapper {
    border: none;
    background: none;
    overflow: visible;
  }

  .compare-table,
  .compare-table tbody {
    display: block;
    width: 100%;
  }

  .compare-table thead {
    display: none;
  }

  .compare-table tbody tr {
    display: block;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-bottom: 12px;
  }

  .compare-table tbody th,
  .compare-table tbody td {
    display: block;
    padding: 6px 0;
    border-bottom: none;
    text-align: left;
  }

  .compare-table tbody th {
    font-size: 13px;
    color: var(--color-text-light);
    padding-top: 0;
  }

  .compare-table tbody td {
    padding-bottom: 8px;
  }

  /* 版本切换器 */
  .version-switcher {
    flex-wrap: wrap;
  }

  .version-tab {
    flex: 1;
    text-align: center;
    min-width: 80px;
  }

  /* 解决方案条目 */
  .solution-block {
    padding: 20px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 36px;
    padding-bottom: 28px;
  }

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

  .footer-links {
    justify-content: center;
  }

  /* FAQ */
  .faq-item summary {
    padding: 14px 16px;
  }

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

  /* 面包屑 */
  .breadcrumb {
    padding: 12px 0;
  }

  /* 图片高度调整 */
  .overview-figure img,
  .version-figure img,
  .about-figure img,
  .process-figure img,
  .content-media-inline img {
    height: 200px;
  }

  /* 侧栏卡片 */
  .sidebar-widget,
  .sidebar-card,
  .sidebar-block,
  .side-card {
    padding: 20px;
  }

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

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

/* ============================================================
   Responsive — 小屏（≤480px）
   ============================================================ */
@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

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

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

  .service-card,
  .service-direction-card,
  .audience-card,
  .path-item,
  .principle-card {
    padding: 18px;
  }

  .version-tab {
    padding: 8px 12px;
    font-size: 13px;
  }

  .check-item {
    padding: 12px 14px;
    font-size: 13px;
  }

  .footer-links {
    gap: 12px;
  }

  .footer-links a {
    font-size: 12px;
  }
}

/* ============================================================
   Accessibility & Misc
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}