```css
:root {
  --bg-main: #f8f0fa;
  --bg-card: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #2d3c4f;
  --text-accent: #4a2b5a;
  --text-link: #2b4c7e;
  --border-light: #d9c5e0;
  --brand-soft: #d9b8e0;
  --brand-deep: #3a1f4a;
  --nav-bg: rgba(255, 255, 255, 0.92);
  --footer-bg: #2e1a3a;
  --footer-text: #f2e8f6;
  --footer-heading: #ffffff;
  --tag-bg: #e6d7f0;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  --code-bg: #f1e8f5;
  --gradient-main: linear-gradient(145deg, #dcc8ea 0%, #b99ad1 100%);
  --gradient-banner: linear-gradient(135deg, #e0cff0, #c6a9e0);
  --gradient-card: linear-gradient(145deg, #ffffff, #f8f0fa);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] {
  --bg-main: #121016;
  --bg-card: #1d1a23;
  --text-primary: #f2e8f6;
  --text-secondary: #d6c4dd;
  --text-accent: #d3b4e8;
  --text-link: #b8d4f0;
  --border-light: #3f2e4a;
  --brand-soft: #6b4f7a;
  --brand-deep: #b39ac7;
  --nav-bg: rgba(20, 15, 24, 0.92);
  --footer-bg: #0d090f;
  --footer-text: #dccde6;
  --footer-heading: #ffffff;
  --tag-bg: #342a3d;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --code-bg: #2d2333;
  --gradient-main: linear-gradient(145deg, #3f2e4a 0%, #6b4f7a 100%);
  --gradient-banner: linear-gradient(135deg, #3f2e4a, #6b4f7a);
  --gradient-card: linear-gradient(145deg, #1d1a23, #2d2333);
  --glass-bg: rgba(29, 26, 35, 0.7);
  --glass-border: rgba(63, 46, 74, 0.3);
}

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

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

body {
  background-color: var(--bg-main);
  background-image: radial-gradient(circle at 10% 20%, rgba(217, 184, 224, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(217, 184, 224, 0.1) 0%, transparent 30%);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
  word-break: break-word;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

p, li, span, div, article, section {
  color: var(--text-primary);
}

a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, opacity 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

a:hover, a:focus-visible {
  color: var(--brand-deep);
  text-decoration: underline;
  outline: 2px solid var(--brand-deep);
  outline-offset: 2px;
}

a:focus:not(:focus-visible) {
  outline: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* 导航吸顶 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 12px;
  flex-wrap: wrap;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-accent);
  letter-spacing: 2px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease;
  display: inline-block;
}

.logo a:hover {
  color: var(--brand-deep);
  transform: scale(1.05);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav-menu a {
  font-weight: 500;
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 20px;
  font-size: 0.95rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand-deep);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu a:hover {
  background: var(--brand-soft);
  color: #17202a;
  text-decoration: none;
}

.nav-menu a:hover::after {
  width: 70%;
}

.menu-toggle {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.menu-toggle:hover {
  background: var(--brand-soft);
}

.nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-card);
  border-radius: 30px;
  padding: 4px 8px 4px 12px;
  border: 1px solid var(--border-light);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box:focus-within {
  border-color: var(--brand-deep);
  box-shadow: 0 0 0 2px rgba(58, 31, 74, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  padding: 6px 0;
  width: 140px;
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.search-box input:focus {
  outline: none;
}

.search-box button {
  background: var(--brand-deep);
  color: #ffffff;
  border: none;
  border-radius: 30px;
  padding: 6px 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.search-box button:hover {
  background: #5a3f6e;
  transform: scale(1.05);
}

.theme-btn {
  background: var(--tag-bg);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  padding: 6px 12px;
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 44px;
}

.theme-btn:hover {
  background: var(--brand-soft);
  transform: scale(1.05);
}

/* 移动菜单 */
@media (max-width: 900px) {
  .nav-wrap {
    position: relative;
  }

  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
    gap: 4px;
    order: 3;
  }

  .nav-menu.open {
    display: flex;
    animation: slideDown 0.3s ease-out;
  }

  .nav-menu a {
    width: 100%;
    padding: 10px 8px;
    border-radius: 8px;
  }

  .nav-menu a::after {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .search-box {
    order: 2;
    flex: 1;
    max-width: 200px;
  }

  .search-box input {
    width: 100%;
  }

  .nav-actions {
    flex: 1;
    justify-content: flex-end;
  }
}

@media (max-width: 480px) {
  .search-box {
    display: none;
  }

  .logo a {
    font-size: 1.5rem;
  }
}

/* Banner */
.banner {
  background: var(--gradient-banner);
  border-radius: 28px;
  padding: 2.5rem 2rem;
  margin: 2rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease-out;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.banner-text {
  flex: 1 1 300px;
  position: relative;
  z-index: 1;
}

.banner-text h1 {
  font-size: 2.6rem;
  color: #1f1726;
  text-shadow: 0 2px 6px rgba(255, 255, 255, 0.3);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.banner-text p {
  font-size: 1.2rem;
  color: #2d1d3a;
  margin: 0.8rem 0 1.2rem;
  font-weight: 500;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  background: #2d1d3a;
  color: #ffffff;
  padding: 10px 24px;
  border-radius: 40px;
  font-weight: 600;
  border: none;
  transition: all 0.2s ease;
  display: inline-block;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: #4e3463;
  color: white;
  transform: scale(1.02);
  text-decoration: none;
}

.btn-light {
  background: #ffffff;
  color: #2d1d3a;
}

.btn-light:hover {
  background: #f0e6f5;
  color: #2d1d3a;
}

.banner-svg {
  flex: 0 0 180px;
  position: relative;
  z-index: 1;
  animation: float 4s ease-in-out infinite;
}

/* 移动端Banner优化 */
@media (max-width: 768px) {
  .banner {
    padding: 2rem 1.5rem;
    margin: 1rem 0;
  }

  .banner-text h1 {
    font-size: 2rem;
  }

  .banner-text p {
    font-size: 1rem;
  }

  .banner-svg {
    flex: 0 0 120px;
    margin: 0 auto;
  }
}

/* 卡片区域 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card {
  background: var(--gradient-card);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-deep), var(--brand-soft), var(--brand-deep));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.card:hover::before {
  opacity: 1;
}

.card h3, .card h4 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
}

.tag {
  background: var(--tag-bg);
  color: var(--text-primary);
  border-radius: 30px;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  transition: all 0.2s ease;
}

.tag:hover {
  background: var(--brand-soft);
  transform: translateY(-2px);
}

/* 文章/新闻样式 */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.article-item {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 1.2rem 1.5rem;
  border-left: 6px solid var(--brand-deep);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand-soft), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.article-item:hover {
  transform: translateX(4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.article-item:hover::after {
  transform: scaleX(1);
}

.article-item h4 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.article-item p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
}

.meta span {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* FAQ 样式 */
.faq-item {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--brand-deep);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.faq-question {
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  user-select: none;
  padding: 8px 0;
}

.faq-question::after {
  content: '▾';
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--brand-deep);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-question.active::after {
  transform: rotate(180deg);
}

.faq-answer {
  margin-top: 12px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
  animation: fadeIn 0.3s ease-out;
  border-top: 1px solid var(--border-light);
  padding-top: 12px;
}

/* 表格 */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  overflow: hidden;
  border-radius: 12px;
}

.info-table th, .info-table td {
  padding: 12px 15px;
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  background: var(--bg-card);
}

.info-table th {
  background: var(--tag-bg);
  font-weight: 600;
}

.info-table tr {
  transition: background-color 0.2s ease;
}

.info-table tr:hover td {
  background: var(--brand-soft);
}

/* footer */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 2.5rem 0 1rem;
  margin-top: 3rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-deep), var(--brand-soft), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.site-footer h4 {
  color: var(--footer-heading);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.site-footer a {
  color: var(--footer-text);
  opacity: 0.9;
}

.site-footer a:hover {
  color: #ffffff;
  opacity: 1;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1.5rem;
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
}

.footer-bottom p {
  color: var(--footer-text);
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--brand-deep);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 100;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #5a3f6e;
  transform: scale(1.1);
}

/* 面包屑 */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb span {
  color: var(--text-secondary);
}

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

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

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

/* 动画 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* 滚动动画延迟 */
.delay-1 {
  transition-delay: 0.1s;
}

.delay-2 {
  transition-delay: 0.2s;
}

.delay-3 {
  transition-delay: 0.3s;
}

/* 自定义动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* 响应式布局优化 */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .banner {
    padding: 2rem 1.5rem;
    margin: 1rem 0;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  :root {
    --text-secondary: #1a1a1a;
    --border-light: #666;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 打印优化 */
@media print {
  .site-header,
  .back-to-top,
  .search-box,
  .theme-btn,
  .menu-toggle {
    display: none !important;
  }

  .site-footer {
    margin-top: 0;
  }

  .card,
  .article-item,
  .faq-item {
    break-inside: avoid;
    box-shadow: none;
  }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: var(--brand-soft);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-deep);
}

/* 选中文本样式 */
::selection {
  background: var(--brand-soft);
  color: var(--text-primary);
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px solid var(--brand-deep);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 链接图标 */
a[target="_blank"]::after {
  content: '↗';
  font-size: 0.8em;
  margin-left: 4px;
  opacity: 0.7;
}

/* 列表样式优化 */
ol, ul {
  padding-left: 1.2em;
}

ol li, ul li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
}

ol li::marker {
  color: var(--brand-deep);
  font-weight: bold;
}

/* 引用样式 */
blockquote {
  border-left: 4px solid var(--brand-deep);
  padding: 12px 20px;
  background: var(--bg-card);
  border-radius: 0 12px 12px 0;
  margin: 1rem 0;
  font-style: italic;
}

/* 代码块 */
code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1rem 0;
}

pre code {
  background: none;
  padding: 0;
}

/* 响应式字体 */
@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.2rem;
  }
}

/* 毛玻璃效果 */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

/* 渐变文本 */
.gradient-text {
  background: linear-gradient(135deg, var(--brand-deep), var(--brand-soft));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* 卡片悬浮效果增强 */
.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card-icon {
  font-size: 2rem;
  display: inline-block;
  transition: transform 0.3s ease;
}

/* 文章阅读更多链接 */
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  transition: gap 0.2s ease;
  margin-top: 8px;
}

.read-more:hover {
  gap: 8px;
}

/* 标签组 */
.tag-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0;
}

/* 分隔线 */
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-light), transparent);
  margin: 2rem 0;
}

/* 主内容区域 */
main {
  flex: 1;
}

/* 暗色模式下图片优化 */
[data-theme="dark"] img {
  filter: brightness(0.9);
}

/* 平滑显示 */
.fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* 页面加载动画 */
@keyframes pageLoad {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.site-header,
.banner,
main > section {
  animation: pageLoad 0.6s ease-out;
}

/* 导航栏滚动阴影增强 */
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* 卡片网格响应式优化 */
@media (min-width: 1600px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 内容区域间距 */
section {
  margin: 3rem 0;
}

section h2 {
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--brand-deep);
  border-radius: 2px;
}

/* 联系方式区域 */
.contact-info {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  background: var(--bg-card);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid var(--border-light);
}

.contact-info p {
  margin-bottom: 8px;
}

.contact-info strong {
  color: var(--text-accent);
}

/* 免责声明区域 */
.disclaimer {
  background: var(--tag-bg);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin: 1rem 0;
  border-left: 4px solid var(--brand-deep);
}

/* 返回顶部按钮移动端优化 */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
}

/* 无障碍优化 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
```