```css
/* ===== 全局重置与字体 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 50%, #dde3ea 100%);
  color: #1f2a3a;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.3s ease;
}

/* ===== 暗黑模式 ===== */
body.dark-mode {
  background: linear-gradient(135deg, #0b111a 0%, #0f172a 50%, #131c2b 100%);
  color: #e2e8f0;
}

body.dark-mode .card,
body.dark-mode .faq-item,
body.dark-mode .article-card,
body.dark-mode .sidebar-box,
body.dark-mode .howto-box,
body.dark-mode .footer-box {
  background: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(148, 163, 184, 0.15);
  color: #e2e8f0;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5 {
  color: #f1f5f9;
}

body.dark-mode .text-muted,
body.dark-mode .breadcrumb {
  color: #94a3b8;
}

body.dark-mode .site-footer {
  background: rgba(15, 23, 42, 0.95);
  color: #94a3b8;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

body.dark-mode .nav-menu a {
  color: #cbd5e1;
}

body.dark-mode .btn-outline {
  border-color: #475569;
  color: #cbd5e1;
}

body.dark-mode .btn-primary {
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

body.dark-mode .tag {
  background: rgba(51, 65, 85, 0.5);
  color: #f1f5f9;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

body.dark-mode .table-custom th {
  background: rgba(51, 65, 85, 0.4);
  color: #f8fafc;
}

body.dark-mode .table-custom td {
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

body.dark-mode .navbar {
  background: rgba(15, 23, 42, 0.85);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

body.dark-mode .menu-toggle {
  color: #e2e8f0;
}

body.dark-mode a {
  color: #93c5fd;
}

body.dark-mode .logo a {
  color: #f1f5f9;
}

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

/* ===== 标题层级 ===== */
h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #1f2a3a 0%, #2c3e50 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.dark-mode h1 {
  background: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 1.5rem;
  color: #1f2a3a;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  border-radius: 3px;
  background: linear-gradient(180deg, #c44536, #e67e22);
}

body.dark-mode h2 {
  color: #f1f5f9;
}

h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: #1e3b4f;
  margin-bottom: 0.8rem;
}

body.dark-mode h3 {
  color: #e2e8f0;
}

/* ===== 链接 ===== */
a {
  color: #1e4a6b;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

a:hover {
  color: #c44536;
}

/* ===== 导航栏 ===== */
.navbar {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  padding-bottom: 12px;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #1f2a3a, #c44536);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: #1f2a3a;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #c44536, #e67e22);
  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: #c44536;
}

.nav-menu a:hover::after {
  width: 100%;
}

/* ===== 按钮 ===== */
.btn-primary {
  background: linear-gradient(135deg, #1f4e6b, #1a3a4d);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-block;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 15px rgba(31, 78, 107, 0.2);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(31, 78, 107, 0.3);
}

.btn-outline {
  border: 2px solid #2c5f7a;
  color: #1f3b4b;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.95rem;
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: rgba(44, 95, 122, 0.1);
  transform: translateY(-2px);
}

/* ===== 卡片 ===== */
.card,
.faq-item,
.article-card,
.sidebar-box,
.howto-box {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-radius: 24px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before,
.article-card::before,
.howto-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #c44536, #e67e22, #f39c12);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover::before,
.article-card:hover::before,
.howto-box:hover::before {
  opacity: 1;
}

.card:hover,
.article-card:hover,
.howto-box:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  font-size: 0.9rem;
  color: #4b5e6d;
  padding: 12px 0;
  margin-top: 10px;
}

.breadcrumb a {
  color: #1e4a6b;
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: #c44536;
}

/* ===== 标签 ===== */
.tag {
  background: linear-gradient(135deg, #e8edf3, #dde3ea);
  color: #1f3b4b;
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 500;
  display: inline-block;
  margin: 4px 4px 4px 0;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ===== FAQ样式 ===== */
.faq-item {
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item summary {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.02);
  border-radius: 16px;
  transition: all 0.3s ease;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

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

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: #c44536;
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item summary:hover {
  background: rgba(196, 69, 54, 0.05);
}

.faq-item[open] summary {
  background: rgba(196, 69, 54, 0.05);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.faq-item p {
  padding: 20px;
  color: #4b5e6d;
  font-size: 0.95rem;
  line-height: 1.8;
}

body.dark-mode .faq-item summary {
  background: rgba(255, 255, 255, 0.03);
}

body.dark-mode .faq-item p {
  color: #cbd5e1;
}

.faq-item {
  animation: fadeInUp 0.6s ease backwards;
}

.faq-item:nth-child(2) { animation-delay: 0.1s; }
.faq-item:nth-child(3) { animation-delay: 0.2s; }
.faq-item:nth-child(4) { animation-delay: 0.3s; }
.faq-item:nth-child(5) { animation-delay: 0.4s; }
.faq-item:nth-child(6) { animation-delay: 0.5s; }
.faq-item:nth-child(7) { animation-delay: 0.6s; }
.faq-item:nth-child(8) { animation-delay: 0.7s; }
.faq-item:nth-child(9) { animation-delay: 0.8s; }
.faq-item:nth-child(10) { animation-delay: 0.9s; }
.faq-item:nth-child(11) { animation-delay: 1s; }
.faq-item:nth-child(12) { animation-delay: 1.1s; }
.faq-item:nth-child(13) { animation-delay: 1.2s; }
.faq-item:nth-child(14) { animation-delay: 1.3s; }
.faq-item:nth-child(15) { animation-delay: 1.4s; }

/* ===== 文章卡片 ===== */
.article-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeInUp 0.6s ease backwards;
}

.article-card:nth-child(2) { animation-delay: 0.1s; }
.article-card:nth-child(3) { animation-delay: 0.2s; }
.article-card:nth-child(4) { animation-delay: 0.3s; }
.article-card:nth-child(5) { animation-delay: 0.4s; }
.article-card:nth-child(6) { animation-delay: 0.5s; }
.article-card:nth-child(7) { animation-delay: 0.6s; }
.article-card:nth-child(8) { animation-delay: 0.7s; }
.article-card:nth-child(9) { animation-delay: 0.8s; }
.article-card:nth-child(10) { animation-delay: 0.9s; }

.article-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1f2a3a;
  line-height: 1.4;
  transition: color 0.3s;
}

.article-card:hover h4 {
  color: #c44536;
}

.article-card .text-muted {
  font-size: 0.85rem;
  color: #6b7c8d;
}

.article-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #4b5e6d;
  flex-grow: 1;
}

body.dark-mode .article-card h4 {
  color: #f1f5f9;
}

body.dark-mode .article-card p {
  color: #cbd5e1;
}

.article-card a {
  color: #c44536;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s;
}

.article-card a:hover {
  transform: translateX(4px);
  color: #e67e22;
}

/* ===== 表格 ===== */
.table-custom {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.table-custom th {
  background: linear-gradient(135deg, #1f4e6b, #2c5f7a);
  color: #ffffff;
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.table-custom td {
  padding: 14px 16px;
  border-bottom: 1px solid #e2e8f0;
  background: rgba(255, 255, 255, 0.8);
}

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

.table-custom tr:hover td {
  background: rgba(196, 69, 54, 0.03);
}

body.dark-mode .table-custom td {
  background: rgba(30, 41, 59, 0.8);
}

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(135deg, #1f2a3a 0%, #0f172a 100%);
  color: #94a3b8;
  padding: 60px 0 30px;
  margin-top: 80px;
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .site-footer {
  background: linear-gradient(135deg, #0f172a 0%, #0b111a 100%);
}

.footer-box {
  background: transparent !important;
  box-shadow: none !important;
  border: none !important;
  backdrop-filter: none !important;
  padding: 0;
}

.footer-box h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.footer-box a {
  color: #94a3b8;
  transition: color 0.3s;
  font-weight: 400;
}

.footer-box a:hover {
  color: #c44536;
}

.footer-box p {
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ===== 返回顶部按钮 ===== */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #1f4e6b, #2c5f7a);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

#backTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#backTop:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 12px 35px rgba(196, 69, 54, 0.3);
}

body.dark-mode #backTop {
  background: linear-gradient(135deg, #c44536, #e67e22);
}

/* ===== 移动端菜单 ===== */
.menu-toggle {
  display: none;
  font-size: 2rem;
  background: none;
  border: none;
  color: #1f2a3a;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: all 0.3s;
}

.menu-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* ===== hero区域特效 ===== */
header.container > div:first-child {
  animation: fadeInLeft 0.8s ease backwards;
}

header.container > div:last-child {
  animation: fadeInRight 0.8s ease 0.2s backwards;
}

header svg {
  transition: all 0.5s ease;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

header svg:hover {
  transform: scale(1.02) rotate(1deg);
}

/* ===== 网格布局优化 ===== */
.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

/* ===== 动画关键帧 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #c44536, #e67e22);
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #e67e22, #f39c12);
  border: 2px solid transparent;
  background-clip: padding-box;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-menu {
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }
  
  .nav-menu {
    display: none;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 20px;
    border-radius: 0 0 24px 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    gap: 0;
  }
  
  body.dark-mode .nav-menu {
    background: rgba(15, 23, 42, 0.98);
  }
  
  .nav-menu.open {
    display: flex;
    animation: fadeInDown 0.3s ease backwards;
  }
  
  .nav-menu a {
    padding: 12px 16px;
    width: 100%;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }
  
  body.dark-mode .nav-menu a {
    border-bottom-color: rgba(255, 255, 255, 0.05);
  }
  
  .nav-menu a:last-child {
    border-bottom: none;
  }
  
  .nav-menu a::after {
    display: none;
  }
  
  .nav-menu a:hover {
    background: rgba(196, 69, 54, 0.05);
    color: #c44536;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .btn-primary,
  .btn-outline {
    display: block;
    width: 100%;
    text-align: center;
    margin: 8px 0 !important;
  }
  
  header.container {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  header.container > div {
    flex: 1 1 100% !important;
  }
  
  .footer-box {
    flex-direction: column;
    text-align: center;
    gap: 20px !important;
  }
  
  .card,
  .article-card,
  .howto-box {
    padding: 20px;
    border-radius: 16px;
  }
  
  #backTop {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  .faq-item summary {
    font-size: 0.95rem;
    padding: 14px 16px;
  }
  
  .faq-item p {
    padding: 16px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .logo a {
    font-size: 1.2rem;
  }
  
  .article-card {
    padding: 16px;
  }
  
  .table-custom th,
  .table-custom td {
    padding: 10px 12px;
    font-size: 0.85rem;
  }
}

/* ===== 暗黑模式过渡动画 ===== */
body,
.navbar,
.card,
.faq-item,
.article-card,
.site-footer,
.btn-primary,
.btn-outline,
.tag,
.table-custom th,
.table-custom td {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

/* ===== 滚动渐显效果 ===== */
.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 渐变装饰元素 ===== */
.section-gradient {
  background: linear-gradient(135deg, rgba(196, 69, 54, 0.03) 0%, rgba(230, 126, 34, 0.03) 100%);
}

/* ===== 图片占位样式 ===== */
.svg-img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.lazy-img {
  background: linear-gradient(135deg, #d7dee8 25%, #e8edf3 50%, #d7dee8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ===== 装饰性动态背景 ===== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 20%, rgba(196, 69, 54, 0.03) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(230, 126, 34, 0.03) 0%, transparent 50%);
  animation: rotate 30s linear infinite;
  z-index: -1;
  pointer-events: none;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== 卡片悬浮光效 ===== */
.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: skewX(-25deg);
  transition: left 0.5s ease;
}

.card:hover::after {
  left: 150%;
}

/* ===== 品牌色渐变 ===== */
.text-gradient {
  background: linear-gradient(135deg, #c44536, #e67e22);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 暗色模式下的特殊调整 ===== */
body.dark-mode .card::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
}

body.dark-mode .faq-item summary:hover {
  background: rgba(255, 255, 255, 0.05);
}

body.dark-mode .faq-item[open] summary {
  background: rgba(255, 255, 255, 0.05);
}

/* ===== SEO友好的文本样式 ===== */
.seo-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #4b5e6d;
}

body.dark-mode .seo-text {
  color: #cbd5e1;
}

/* ===== 打印样式 ===== */
@media print {
  body {
    background: #fff;
    color: #000;
  }
  
  .navbar,
  .site-footer,
  #backTop,
  .btn-primary,
  .btn-outline,
  .menu-toggle {
    display: none !important;
  }
  
  .card,
  .faq-item,
  .article-card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}
```