/* ============================================================
   yixin888888.com 整站样式
   会议资料风：主色深蓝 #1E3A8A / 辅助琥珀金 #F59E0B
   背景浅灰白 #F8FAFC / 正文深灰 #1E293B / 边框浅灰 #E2E8F0
   ============================================================ */

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1E293B;
  background-color: #F8FAFC;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #1E3A8A;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #F59E0B;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #1E293B;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 0.75rem;
}

/* ---------- 全站骨架 ---------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E2E8F0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.375rem;
  font-weight: 800;
  color: #1E3A8A;
}

.brand-tag {
  font-size: 0.8125rem;
  color: #64748B;
  border-left: 2px solid #F59E0B;
  padding-left: 8px;
  line-height: 1.4;
}

.site-nav ul {
  display: flex;
  gap: 4px;
}

.site-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 0.9375rem;
  color: #475569;
  border-radius: 4px;
  font-weight: 500;
}

.site-nav a:hover {
  color: #1E3A8A;
  background-color: #F1F5F9;
}

.site-nav a.is-current {
  color: #1E3A8A;
  background-color: #EFF6FF;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: #1E3A8A;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer {
  background-color: #FFFFFF;
  border-top: 1px solid #E2E8F0;
  margin-top: 64px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: 48px;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #1E3A8A;
  margin-bottom: 12px;
}

.footer-brand p:not(.footer-logo) {
  font-size: 0.875rem;
  color: #64748B;
  line-height: 1.7;
  margin-bottom: 0;
}

.footer-heading {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 16px;
}

.footer-links ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a,
.footer-contact li {
  font-size: 0.875rem;
  color: #475569;
}

.footer-links a:hover {
  color: #1E3A8A;
}

.footer-bottom {
  border-top: 1px solid #E2E8F0;
  padding: 16px 24px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: #94A3B8;
  margin-bottom: 0;
}

/* ---------- 内页通用 ---------- */
.site-inner {
  min-height: 100vh;
}

.inner-main {
  padding-bottom: 48px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: #64748B;
  padding: 16px 0 8px;
}

.breadcrumb a {
  color: #64748B;
}

.breadcrumb a:hover {
  color: #1E3A8A;
}

.breadcrumb-sep {
  color: #CBD5E1;
}

.breadcrumb-current {
  color: #1E293B;
  font-weight: 500;
}

.page-header {
  padding: 24px 0 16px;
  border-bottom: 1px solid #E2E8F0;
  margin-bottom: 24px;
}

.page-title {
  font-size: 2rem;
  font-weight: 800;
  color: #1E293B;
  margin: 0;
}

.page-title-area {
  margin-bottom: 32px;
}

.page-title-area p {
  font-size: 0.9375rem;
  color: #475569;
  line-height: 1.7;
  max-width: 720px;
  margin: 0;
}

/* ---------- 通用组件 ---------- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  min-height: 44px;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background-color: #1E3A8A;
  color: #FFFFFF;
  border: 1px solid #1E3A8A;
}

.btn-primary:hover {
  background-color: #1E40AF;
  border-color: #1E40AF;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: #1E3A8A;
  border: 1px solid #CBD5E1;
}

.btn-secondary:hover {
  border-color: #1E3A8A;
  color: #1E3A8A;
  transform: translateY(-1px);
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1E293B;
  position: relative;
  padding-left: 14px;
}

.section-heading h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background-color: #F59E0B;
}

.section-link {
  font-size: 0.875rem;
  color: #1E3A8A;
  font-weight: 500;
  white-space: nowrap;
}

.section-link:hover {
  color: #F59E0B;
}

.section-block {
  padding: 56px 0;
  border-bottom: 1px solid #E2E8F0;
}

.section-block:last-child {
  border-bottom: none;
}

.container {
  width: 100%;
}

/* FAQ 折叠 */
.faq-item {
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  background-color: #FFFFFF;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1E293B;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  position: relative;
  padding-right: 48px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: #1E3A8A;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid #E2E8F0;
}

.faq-answer {
  padding: 16px 20px;
  font-size: 0.9375rem;
  color: #475569;
}

.faq-answer p {
  margin-bottom: 8px;
}

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

/* ---------- 首页 ---------- */
.site-home .hero-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 64px 0 56px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #1E3A8A;
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 4px;
  padding: 4px 12px;
  margin-bottom: 16px;
}

.hero-content h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: #1E293B;
  margin-bottom: 16px;
}

.hero-slogan {
  font-size: 1.0625rem;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
}

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

.hero-media {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(30, 41, 59, 0.08);
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

/* 行业动态预览 */
.dongtai-preview .preview-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.dongtai-preview .preview-item {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.dongtai-preview .preview-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.06);
  border-color: #BFDBFE;
}

.dongtai-preview .preview-item h3 {
  margin-bottom: 8px;
}

.dongtai-preview .preview-item h3 a {
  color: #1E293B;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.dongtai-preview .preview-item h3 a:hover {
  color: #1E3A8A;
}

.dongtai-preview .preview-item time {
  display: block;
  font-size: 0.8125rem;
  color: #94A3B8;
  margin-bottom: 8px;
}

.dongtai-preview .preview-item p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 服务指南网格 */
.zhinan-grid .guide-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.zhinan-grid .guide-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 28px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: block;
}

.zhinan-grid .guide-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.06);
  border-color: #BFDBFE;
}

.zhinan-grid .guide-card h3 {
  font-size: 1.0625rem;
  color: #1E3A8A;
  margin-bottom: 10px;
}

.zhinan-grid .guide-card p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 专题卡片 */
.zhuanti-cards .topic-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.zhuanti-cards .topic-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.zhuanti-cards .topic-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.06);
  border-color: #BFDBFE;
}

.zhuanti-cards .topic-card figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.zhuanti-cards .topic-card figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.zhuanti-cards .topic-card h3 {
  padding: 16px 20px 8px;
  font-size: 1.0625rem;
}

.zhuanti-cards .topic-card h3 a {
  color: #1E293B;
}

.zhuanti-cards .topic-card h3 a:hover {
  color: #1E3A8A;
}

.zhuanti-cards .topic-card p {
  padding: 0 20px 20px;
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 0;
}

/* FAQ 列表 */
.wenda-list .faq-items {
  max-width: 820px;
}

/* 术语精选 */
.shuyu-index .term-picks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.shuyu-index .term-item {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
}

.shuyu-index .term-item h3 {
  font-size: 1rem;
  color: #1E3A8A;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid #F59E0B;
  display: inline-block;
}

.shuyu-index .term-item p {
  font-size: 0.875rem;
  color: #64748B;
  line-height: 1.6;
  margin-bottom: 0;
}

/* 合作咨询入口 */
.contact-entry {
  padding: 56px 0;
}

.contact-inner {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 48px;
  text-align: center;
}

.contact-inner h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.contact-inner > p {
  font-size: 0.9375rem;
  color: #475569;
  max-width: 560px;
  margin: 0 auto 32px;
}

.contact-types {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 720px;
  margin: 0 auto;
}

.contact-types li {
  background-color: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1E293B;
}

/* ---------- 内页布局 ---------- */
/* 侧栏在左 */
.sidebar-left .layout-shell,
.sidebar-left .page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.sidebar-left .layout-shell > aside,
.sidebar-left .page-layout > aside {
  position: sticky;
  top: 88px;
}

/* 侧栏在右（主内容在前） */
.layout-shell:not(.sidebar-left) {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

.layout-shell:not(.sidebar-left) > aside {
  position: sticky;
  top: 88px;
}

/* ---------- 行业动态页 ---------- */
.aside-filter,
.aside-categories {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
}

.aside-filter h2,
.aside-categories h2 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #F59E0B;
  display: inline-block;
}

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

.filter-list a {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: #475569;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.filter-list a:hover {
  background-color: #EFF6FF;
  color: #1E3A8A;
}

.aside-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #E2E8F0;
}

.aside-note p {
  font-size: 0.8125rem;
  color: #94A3B8;
  line-height: 1.6;
  margin-bottom: 0;
}

.dynamic-list .section-title {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.dynamic-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.dynamic-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 41, 59, 0.05);
  border-color: #BFDBFE;
}

.dynamic-item img {
  width: 100%;
  height: 100%;
  min-height: 120px;
  object-fit: cover;
  border-radius: 6px;
}

.dynamic-content {
  display: flex;
  flex-direction: column;
}

.dynamic-meta {
  font-size: 0.8125rem;
  color: #94A3B8;
  margin-bottom: 8px;
}

.dynamic-content h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.dynamic-content h3 a {
  color: #1E293B;
}

.dynamic-content h3 a:hover {
  color: #1E3A8A;
}

.dynamic-content p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  color: #1E3A8A;
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 4px;
  padding: 2px 8px;
  margin-right: 8px;
}

.aside-related {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
}

.aside-related h2 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #F59E0B;
  display: inline-block;
}

.related-list li {
  padding: 10px 0;
  border-bottom: 1px solid #F1F5F9;
}

.related-list li:last-child {
  border-bottom: none;
}

.related-list a {
  font-size: 0.875rem;
  color: #475569;
  line-height: 1.5;
  display: block;
}

.related-list a:hover {
  color: #1E3A8A;
}

/* ---------- 服务指南页 ---------- */
.aside-categories ul li {
  margin-bottom: 4px;
}

.aside-categories ul a {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: #475569;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.aside-categories ul a:hover {
  background-color: #EFF6FF;
  color: #1E3A8A;
}

.guide-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.guide-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 41, 59, 0.05);
  border-color: #BFDBFE;
}

.guide-media {
  border-radius: 6px;
  overflow: hidden;
}

.guide-media img {
  width: 100%;
  height: 100%;
  min-height: 140px;
  object-fit: cover;
}

.guide-content h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.guide-content h3 a {
  color: #1E293B;
}

.guide-content h3 a:hover {
  color: #1E3A8A;
}

.guide-content > p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 12px;
  line-height: 1.6;
}

.material-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.material-list li {
  font-size: 0.8125rem;
  color: #475569;
  background-color: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 4px;
  padding: 4px 10px;
}

.guide-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1E3A8A;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.guide-link:hover {
  color: #F59E0B;
}

.guide-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.guide-link:hover::after {
  transform: translateX(3px);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 相关推荐（指南页） */
.related-links {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid #E2E8F0;
}

.related-links h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

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

.related-links ul li {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 16px;
}

.related-links ul a {
  font-size: 0.875rem;
  color: #1E3A8A;
  font-weight: 500;
  line-height: 1.5;
  display: block;
}

.related-links ul a:hover {
  color: #F59E0B;
}

/* ---------- 专题整理页 ---------- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.topic-media {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-content {
  padding: 20px;
}

.topic-content h2 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.topic-content h2 a {
  color: #1E293B;
}

.topic-content h2 a:hover {
  color: #1E3A8A;
}

.topic-content p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 14px;
  line-height: 1.6;
}

.topic-content a {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1E3A8A;
}

.topic-content a:hover {
  color: #F59E0B;
}

/* ---------- 术语表页 ---------- */
.alphabet-index {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 32px;
}

.alphabet-index a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #475569;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.alphabet-index a:hover {
  background-color: #EFF6FF;
  color: #1E3A8A;
}

.term-groups {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.term-group {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  scroll-margin-top: 88px;
}

.term-group > h2 {
  font-size: 1.25rem;
  color: #1E3A8A;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #F59E0B;
  display: inline-block;
}

.term-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
}

.term-list .term-item {
  background: none;
  border: none;
  border-bottom: 1px solid #F1F5F9;
  border-radius: 0;
  padding: 12px 0;
}

.term-list .term-item:last-child {
  border-bottom: none;
}

.term-list dt {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 4px;
}

.term-list dd {
  font-size: 0.875rem;
  color: #64748B;
  line-height: 1.6;
  margin: 0;
}

.term-figure,
.term-media {
  display: block;
}

.term-figure img,
.term-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 6px;
}

.term-related {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #E2E8F0;
}

.term-related h2 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.term-related ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.term-related ul li {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 16px;
}

.term-related ul a {
  font-size: 0.875rem;
  color: #1E3A8A;
  font-weight: 500;
  line-height: 1.5;
  display: block;
}

.term-related ul a:hover {
  color: #F59E0B;
}

/* ---------- 常见问题页 ---------- */
.faq-group {
  margin-bottom: 40px;
}

.faq-group > h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #F59E0B;
  display: inline-block;
}

.faq-list .faq-item {
  margin-bottom: 12px;
}

/* 相关推荐（FAQ页） */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(30, 41, 59, 0.06);
}

.related-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.related-card h3 {
  font-size: 1rem;
  padding: 16px 20px 8px;
}

.related-card h3 a {
  color: #1E293B;
}

.related-card h3 a:hover {
  color: #1E3A8A;
}

.related-card p {
  font-size: 0.875rem;
  color: #64748B;
  padding: 0 20px;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card a {
  display: inline-block;
  margin: 0 20px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #1E3A8A;
}

.related-card a:hover {
  color: #F59E0B;
}

/* FAQ 页联系入口 */
.contact-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.contact-item {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
}

.contact-item h3 {
  font-size: 1rem;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.contact-item p {
  font-size: 0.875rem;
  color: #64748B;
  margin-bottom: 0;
  line-height: 1.6;
}

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

.error-section {
  text-align: center;
  padding: 64px 24px;
  max-width: 560px;
}

.error-code {
  font-size: 4.5rem;
  font-weight: 800;
  color: #1E3A8A;
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.9375rem;
  color: #64748B;
  margin-bottom: 28px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #FFFFFF;
  background-color: #1E3A8A;
  border-radius: 6px;
  min-height: 44px;
  border: 1px solid #1E3A8A;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: #1E40AF;
  color: #FFFFFF;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .zhinan-grid .guide-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .shuyu-index .term-picks {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .site-home .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .layout-shell:not(.sidebar-left) {
    grid-template-columns: 1fr 260px;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }

  .brand-name {
    font-size: 1.125rem;
  }

  .brand-tag {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 12px 16px;
    gap: 2px;
  }

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

  .site-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #E2E8F0;
    box-shadow: 0 8px 16px rgba(30, 41, 59, 0.08);
    z-index: 99;
  }

  .site-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: 6px;
  }

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

  .site-home .hero-section {
    padding: 40px 0;
  }

  .hero-content h1 {
    font-size: 1.625rem;
  }

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

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

  .section-block {
    padding: 40px 0;
  }

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

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

  .zhuanti-cards .topic-list {
    grid-template-columns: 1fr;
  }

  .shuyu-index .term-picks {
    grid-template-columns: 1fr;
  }

  .contact-types {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 16px;
  }

  /* 内页：侧栏与主内容单列，主内容在前 */
  .sidebar-left .layout-shell,
  .sidebar-left .page-layout,
  .layout-shell:not(.sidebar-left) {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-left .layout-shell > aside,
  .sidebar-left .page-layout > aside,
  .layout-shell:not(.sidebar-left) > aside {
    position: static;
    order: 2;
  }

  .sidebar-left .layout-shell > section,
  .sidebar-left .page-layout > section,
  .layout-shell:not(.sidebar-left) > section {
    order: 1;
  }

  .dynamic-item {
    grid-template-columns: 1fr;
  }

  .dynamic-item img {
    height: 180px;
  }

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

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

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

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

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

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

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

  .contact-group {
    grid-template-columns: 1fr;
  }

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

  .page-title {
    font-size: 1.5rem;
  }

  .alphabet-index {
    padding: 12px;
    gap: 2px;
  }

  .alphabet-index a {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 1rem;
  }

  .hero-content h1 {
    font-size: 1.375rem;
  }

  .hero-slogan {
    font-size: 0.9375rem;
  }

  .section-heading {
    flex-direction: column;
    gap: 8px;
  }

  .section-heading h2 {
    font-size: 1.25rem;
  }

  .footer-bottom {
    text-align: left;
  }
}