/* ============================================================
   818吃瓜 · 整站样式表
   版本：1.0
   说明：覆盖全部页面共享骨架与各业务模块
   ============================================================ */

/* ============================================================
   1. BASE —— 变量 / 重置 / 全局基础
   ============================================================ */
:root {
  --color-primary: #1B2A4A;
  --color-primary-dark: #14203A;
  --color-accent: #E8893C;
  --color-accent-dark: #D8762A;
  --color-bg: #F7F8FA;
  --color-text: #333333;
  --color-text-light: #6E7B8A;
  --color-border: #E3E7EE;
  --color-white: #FFFFFF;
  --color-card-bg: #FFFFFF;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(27, 42, 74, 0.08);
  --shadow-card-hover: 0 4px 12px rgba(27, 42, 74, 0.12);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

*,
*::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-family);
  font-size: 16px;
  line-height: 1.7;
  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;
  object-fit: cover;
}

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.3;
}

h1 {
  font-size: 36px;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 0;
  color: var(--color-text);
}

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

/* ============================================================
   2. LAYOUT —— 全站共享骨架
   ============================================================ */

/* ----- 页头 ----- */
.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(27, 42, 74, 0.2);
}

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

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.5px;
}

.brand-tagline {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
}

.brand:hover .brand-name {
  color: var(--color-accent);
}

/* ----- 主导航 ----- */
.main-nav {
  flex: 1;
}

.nav-list {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
}

.nav-list li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  background-color: var(--color-primary-dark);
  color: var(--color-accent);
  font-weight: 700;
}

/* ----- 汉堡按钮（默认隐藏） ----- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 10px;
  flex-shrink: 0;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ----- 面包屑 ----- */
.breadcrumb {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

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

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

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

.breadcrumb-sep {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0 2px;
}

.breadcrumb-current {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
}

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

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

/* ----- 页面主容器 ----- */
.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  width: 100%;
}

/* ----- 内页侧栏布局（侧栏在左） ----- */
.page-layout.sidebar-left,
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 56px;
  align-items: start;
}

.page-layout.sidebar-left .page-sidebar,
.page-layout.sidebar-left .sidebar,
.layout-shell.sidebar-left .page-sidebar,
.layout-shell.sidebar-left .sidebar {
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

/* ----- 侧栏 ----- */
.page-sidebar,
.sidebar {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-inner {
  display: block;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 16px;
}

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

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--color-text);
  transition: background-color var(--transition), color var(--transition);
}

.sidebar-nav a:hover {
  background-color: var(--color-bg);
  color: var(--color-accent);
}

.sidebar-list li {
  margin-bottom: 4px;
}

.sidebar-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--color-text);
  transition: background-color var(--transition), color var(--transition);
}

.sidebar-list a:hover {
  background-color: var(--color-bg);
  color: var(--color-accent);
}

.sidebar-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
  color: var(--color-text-light);
}

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

.sidebar-card {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

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

.sidebar-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.sidebar-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

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

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.page-title-wrap {
  padding-top: 28px;
  padding-bottom: 4px;
}

.page-lead {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

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

.page-intro {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 24px;
}

/* ----- 页脚 ----- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding-top: 48px;
}

.footer-layout {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-slogan {
  font-size: 15px;
  color: var(--color-accent);
  margin-bottom: 12px;
}

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

.footer-col h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-lang {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* ----- 通用按钮 ----- */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
    box-shadow var(--transition);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  border: 1px solid var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(232, 137, 60, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.text-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* ----- 通用 section 标题 ----- */
.section-head {
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.section-head p {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 680px;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

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

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

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

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

/* ============================================================
   3. COMPONENTS —— 通用业务模块
   ============================================================ */

/* ----- 首页 Hero ----- */
.hero-section {
  background-color: var(--color-bg);
  padding: 48px 0 56px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.hero-intro {
  padding-top: 12px;
}

.hero-intro h1 {
  font-size: 34px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.hero-intro .btn-primary {
  margin-top: 4px;
}

.hero-catalog {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.hero-catalog h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

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

.catalog-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition),
    background-color var(--transition);
}

.catalog-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-white);
  box-shadow: var(--shadow-card-hover);
}

.catalog-icon {
  font-size: 22px;
  line-height: 1;
  margin-bottom: 4px;
}

.catalog-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.catalog-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
}

.hero-insights {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.hero-insights h2 {
  font-size: 20px;
  color: var(--color-white);
  margin-bottom: 16px;
}

.recent-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.recent-item {
  padding: 14px;
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

.recent-date {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 6px;
}

.recent-item h3 {
  font-size: 16px;
  color: var(--color-white);
  margin-bottom: 6px;
}

.recent-item p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

.hero-insights .text-link {
  color: var(--color-accent);
  margin-top: 16px;
}

.content-media {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.content-media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* ----- 价值说明区 ----- */
.value-section {
  background-color: var(--color-white);
  padding: 56px 0;
}

.value-content {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.value-content h2 {
  font-size: 28px;
  margin-bottom: 20px;
}

.value-content p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

/* ----- 首页服务预览 ----- */
.services-preview {
  background-color: var(--color-bg);
  padding: 56px 0;
}

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

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

.service-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.service-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.service-card h3 {
  font-size: 18px;
  padding: 16px 16px 8px;
}

.service-card p {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 0 16px 12px;
  line-height: 1.6;
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 16px 16px;
}

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

/* ----- 首页内容预览 ----- */
.insights-preview {
  background-color: var(--color-white);
  padding: 56px 0;
}

.insight-preview-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.insight-preview-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.insight-preview-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}

.preview-content {
  display: block;
}

.preview-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(232, 137, 60, 0.12);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.insight-preview-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.preview-date {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.insight-preview-item p:not(.preview-date) {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.preview-more {
  margin-top: 32px;
  text-align: center;
}

/* ----- 首页合作引导 ----- */
.cooperation-link {
  background-color: var(--color-bg);
  padding: 56px 0;
}

.cooperation-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.cooperation-text h2 {
  font-size: 28px;
  margin-bottom: 16px;
}

.cooperation-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

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

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin: 0 auto 10px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
}

.step-info {
  text-align: center;
}

.step-info h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.step-info p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ----- 首页 FAQ 预览 ----- */
.faq-preview {
  background-color: var(--color-white);
  padding: 56px 0;
}

.faq-preview-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

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

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

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

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

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

.faq-more {
  margin-top: 24px;
  text-align: center;
}

/* ----- 机构介绍页 ----- */
.positioning-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: center;
}

.content-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.content-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
}

.positioning-text {
  display: block;
}

.positioning-text p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

/* 核心价值 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.value-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.value-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  position: relative;
  padding-bottom: 10px;
}

.value-card h3::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
  margin-top: 8px;
}

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

/* 发展记录时间线 */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.timeline-marker {
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  background-color: var(--color-accent);
  border: 3px solid var(--color-white);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.timeline-content h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.timeline-time {
  display: inline-block;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* 工作原则 */
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  border-top: 3px solid var(--color-accent);
}

.principle-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

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

/* 页脚注释 */
.section-footnote {
  margin-top: 32px;
  padding: 20px 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text-light);
}

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

.section-footnote a {
  color: var(--color-accent);
  font-weight: 500;
}

/* ----- 服务方向页 ----- */
.service-overview {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.overview-text h2 {
  font-size: 26px;
  margin-bottom: 12px;
}

.overview-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.overview-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.overview-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.overview-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
}

.service-detail-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.detail-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-bg);
}

.detail-head h2 {
  font-size: 24px;
}

.detail-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(232, 137, 60, 0.12);
  border-radius: var(--radius-sm);
}

.detail-body p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.detail-list-wrap {
  margin-bottom: 16px;
}

.detail-list-wrap h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.detail-list {
  padding-left: 4px;
}

.detail-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

.detail-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.detail-audience {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 16px;
}

.detail-audience h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.detail-audience p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

.service-detail-block .text-link {
  margin-top: 4px;
}

/* 服务对象 */
.service-audience {
  margin-top: 48px;
}

.service-audience > h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

.service-audience > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

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

.audience-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-primary);
}

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

/* 服务流程 */
.service-process {
  margin-top: 48px;
}

.service-process > h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

.service-process .section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

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

.process-item .step-num {
  width: 36px;
  height: 36px;
  font-size: 16px;
  margin-bottom: 12px;
}

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

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

.process-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 16px;
}

/* ----- 研究方法页 ----- */
.method-section {
  margin-bottom: 40px;
}

.method-section > h2 {
  font-size: 24px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.method-section .section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.goal-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.goal-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  position: relative;
  padding-left: 24px;
}

.goal-item h3::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-size: 16px;
  font-weight: 700;
}

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

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

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.6;
}

.check-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 12px;
  border-radius: 50%;
  margin-top: 2px;
}

.method-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.method-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border-left: 4px solid var(--color-accent);
}

.method-step h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.method-step p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

.method-step p.step-output {
  font-size: 14px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: 8px;
  margin-bottom: 0;
}

.method-step .step-output strong {
  color: var(--color-primary);
  font-weight: 600;
}

.method-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

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

.method-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
}

.quality-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quality-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding-top: 10px;
  padding-bottom: 10px;
  padding-right: 16px;
}

.quality-list li::before {
  content: "✔";
  position: absolute;
  left: 8px;
  top: 10px;
  color: var(--color-accent);
  font-size: 13px;
}

.related-links {
  margin-top: 40px;
}

.related-links > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.related-links > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.related-card {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.related-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}

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

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

/* ----- 公开内容页 ----- */
.content-section {
  margin-bottom: 40px;
}

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

.content-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: box-shadow var(--transition);
}

.content-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.card-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.card-media figure {
  height: 100%;
}

.card-media img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-body h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.card-date {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.card-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  align-self: flex-start;
}

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

.related-section {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-section h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.related-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.related-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

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

.related-item h3 a {
  color: var(--color-primary);
}

.related-item h3 a:hover {
  color: var(--color-accent);
}

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

/* ----- FAQ 页 ----- */
.faq-section {
  margin-bottom: 40px;
}

.faq-section > h2 {
  font-size: 24px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

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

.faq-answer {
  padding: 0 20px 16px;
}

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

.faq-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 32px;
}

.faq-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.faq-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
}

.related-links-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.related-links-item {
  display: inline-block;
  font-size: 14px;
  color: var(--color-accent);
  margin-right: 20px;
  margin-bottom: 8px;
}

.related-links-item:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* ----- 合作路径页 ----- */
.process-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.process-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.process-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

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

.process-step .step-num {
  width: 36px;
  height: 36px;
  font-size: 16px;
  margin-bottom: 12px;
}

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

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

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

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

.guidance-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.guidance-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.guidance-item a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.guidance-item a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

.faq-link-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-link-list li a {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.faq-link-list li a:hover {
  color: var(--color-accent);
}

.faq-link-list li p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.notes-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}

.notes-block p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.notes-block p:last-child {
  margin-bottom: 0;
}

.notes-cta {
  text-align: center;
}

.cta-button {
  display: inline-block;
  padding: 14px 36px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition), box-shadow var(--transition);
}

.cta-button:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(232, 137, 60, 0.3);
}

/* ----- 404 页 ----- */
.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.error-section {
  padding: 80px 0;
  width: 100%;
}

.error-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

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

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

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

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

/* ============================================================
   4. PAGES —— 页面级微调（不覆盖全局骨架）
   ============================================================ */

/* 首页 body 标记 */
body.site-home {
  background-color: var(--color-bg);
}

/* 内页 body 标记 */
body.site-inner {
  background-color: var(--color-bg);
}

/* ============================================================
   5. RESPONSIVE —— 响应式断点
   ============================================================ */

/* ----- 平板（≤1024px） ----- */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .hero-intro {
    grid-column: 1 / -1;
  }

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

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

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

  .positioning-content {
    grid-template-columns: 1fr;
  }

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

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

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }

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

  .content-card {
    grid-template-columns: 160px 1fr;
  }
}

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

  .header-inner {
    padding: 0 16px;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-primary);
    padding: 12px 16px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    display: none;
  }

  .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:hover {
    background-color: rgba(255, 255, 255, 0.08);
  }

  .nav-link.is-current {
    background-color: var(--color-primary-dark);
    color: var(--color-accent);
  }

  /* 首页 */
  .hero-layout {
    grid-template-columns: 1fr;
  }

  .hero-intro {
    grid-column: auto;
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

  .footer-brand {
    max-width: 100%;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
  }

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

  /* 内页侧栏布局：正文优先，侧栏移到底部 */
  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-top: 20px;
    padding-bottom: 40px;
  }

  .page-layout.sidebar-left .page-sidebar,
  .page-layout.sidebar-left .sidebar,
  .layout-shell.sidebar-left .page-sidebar,
  .layout-shell.sidebar-left .sidebar {
    order: 2;
    position: static;
    width: 100%;
  }

  .page-layout.sidebar-left .inner-main,
  .page-layout.sidebar-left .page-content,
  .layout-shell.sidebar-left .inner-main,
  .layout-shell.sidebar-left .page-content {
    order: 1;
    width: 100%;
  }

  /* 服务流程与联系流程 */
  .process-steps {
    grid-template-columns: 1fr;
  }

  /* 内容卡片 */
  .content-card {
    grid-template-columns: 1fr;
  }

  .card-media img {
    height: 160px;
  }

  /* 服务详情块 */
  .service-detail-block {
    padding: 20px;
  }

  /* 页脚注释 */
  .section-footnote {
    padding: 16px;
  }

  /* 404 */
  .error-code {
    font-size: 48px;
  }

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

  .error-actions .btn-primary,
  .error-actions .btn-secondary {
    width: 100%;
    max-width: 280px;
  }

  /* 服务总览 */
  .service-overview {
    margin-bottom: 24px;
  }

  /* 方法页步骤输出 */
  .method-step {
    padding: 16px;
  }

  /* 首页 hero 内容顺序：定位 → 近期内容 → 业务目录 */
  .hero-layout .hero-intro {
    order: 1;
  }

  .hero-layout .hero-insights {
    order: 2;
  }

  .hero-layout .hero-catalog {
    order: 3;
  }
}

/* ----- 小屏手机（≤390px） ----- */
@media (max-width: 390px) {
  .catalog-grid {
    grid-template-columns: 1fr;
  }

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

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

  .brand-tagline {
    display: none;
  }

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

  .hero-catalog {
    padding: 16px;
  }

  .hero-insights {
    padding: 16px;
  }
}

/* ============================================================
   6. 交互增强（纯 CSS 增强，不依赖 JS 初始可见性）
   ============================================================ */

/* FAQ 手风琴过渡 */
.faq-item[open] .faq-answer {
  animation: faqSlideDown 0.25s ease;
}

@keyframes faqSlideDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 卡片 hover 微动效 */
.service-card,
.insight-preview-item,
.content-card,
.related-card,
.audience-card,
.guidance-item,
.value-card,
.principle-card {
  transition: box-shadow var(--transition), transform var(--transition),
    border-color var(--transition);
}

/* 侧栏链接 hover 左侧强调 */
.sidebar-nav a,
.sidebar-list a {
  position: relative;
  padding-left: 16px;
}

.sidebar-nav a::before,
.sidebar-list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background-color: var(--color-accent);
  border-radius: 2px;
  transition: height var(--transition);
}

.sidebar-nav a:hover::before,
.sidebar-list a:hover::before {
  height: 16px;
}

/* 当前目录项高亮 */
.sidebar-nav a.is-current,
.sidebar-list a.is-current {
  background-color: var(--color-bg);
  color: var(--color-accent);
  font-weight: 600;
}

/* 打印优化 */
@media print {
  .site-header,
  .site-footer,
  .breadcrumb,
  .nav-toggle,
  .sidebar,
  .page-sidebar {
    display: none !important;
  }

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    display: block;
  }

  body {
    background-color: var(--color-white);
  }

  .container {
    max-width: 100%;
    padding: 0;
  }
}