```css
:root {
  --bg: #F8F9FA;
  --surface: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --text-primary: #1F2937;
  --text-secondary: #3E4B5C;
  --text-title: #0B1E33;
  --brand: #1A3A5F;
  --brand-dark: #0F2A44;
  --border: #D1D9E6;
  --accent: #C73E3E;
  --footer-bg: #0E1E2F;
  --footer-text: #D1D9E6;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 12px 28px rgba(0, 0, 0, 0.12);
  --radius: 16px;
  --radius-sm: 12px;
  --space: 24px;
  --text-link: #1E5B9E;
  --glass-border: rgba(255, 255, 255, 0.25);
  --gradient-banner: linear-gradient(135deg, #1A3A5F 0%, #2B4F77 50%, #3A6B9E 100%);
  --gradient-accent: linear-gradient(135deg, #C73E3E, #E07A5F);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #111B26;
  --surface: #1A2634;
  --surface-glass: rgba(26, 38, 52, 0.78);
  --text-primary: #E2E8F0;
  --text-secondary: #C0CBD9;
  --text-title: #F1F5F9;
  --brand: #5B8DC9;
  --brand-dark: #2B4F77;
  --border: #2D3E50;
  --accent: #E07A5F;
  --footer-bg: #0B1219;
  --footer-text: #B0BECF;
  --text-link: #8BB9E0;
  --gradient-banner: linear-gradient(135deg, #0F2A44, #1A3A5F, #2B4F77);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 16px 32px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: none;
  color: var(--brand);
}

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

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

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-title);
  display: flex;
  align-items: center;
  gap: 6px;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

.logo span {
  background: var(--gradient-accent);
  color: white;
  padding: 2px 12px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  box-shadow: 0 2px 8px rgba(199, 62, 62, 0.3);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 0;
  transition: color 0.2s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--brand);
  text-decoration: none;
}

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

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 3px 4px;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(26, 58, 95, 0.12);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 6px 10px;
  color: var(--text-primary);
  outline: none;
  width: 130px;
  font-size: 0.9rem;
}

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

.search-box button {
  background: var(--brand);
  border: none;
  color: white;
  padding: 6px 14px;
  border-radius: 30px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s, transform 0.2s;
}

.search-box button:hover {
  background: var(--brand-dark);
  transform: scale(1.03);
}

/* 主题与菜单按钮 */
.theme-toggle,
.menu-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.2rem;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--brand);
  color: white;
  border-color: var(--brand);
  transform: rotate(15deg);
}

.menu-toggle {
  display: none;
}

/* 移动菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  gap: 4px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.mobile-menu.open {
  max-height: 400px;
  padding: 16px 24px 24px;
}

.mobile-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, padding-left 0.3s;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu a:hover {
  color: var(--brand);
  padding-left: 8px;
}

/* ---------- Banner ---------- */
.banner {
  background: var(--gradient-banner);
  color: white;
  padding: 48px 0;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 48px 48px;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 60%);
  pointer-events: none;
}

.banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(199, 62, 62, 0.15), transparent 60%);
  pointer-events: none;
}

.banner-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.banner-text {
  flex: 1.2;
  max-width: 640px;
}

.banner-text h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  color: #ffffff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.banner-text p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 28px;
  line-height: 1.6;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.btn-group {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 30px;
  border-radius: 60px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  font-size: 1rem;
  letter-spacing: 0.3px;
}

.btn-light {
  background: #ffffff;
  color: var(--brand-dark);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn-light:hover {
  background: #f0f2f5;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.8);
  color: white;
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-3px);
  border-color: white;
}

.banner-visual {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.svg-banner {
  width: 300px;
  height: auto;
  filter: drop-shadow(0 12px 28px rgba(0, 0, 0, 0.3));
  animation: float 5s ease-in-out infinite;
}

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

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 20px 0 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* ---------- 区块 ---------- */
.section {
  padding: 56px 0;
}

.section-title {
  font-size: 2rem;
  color: var(--text-title);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 14px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: 4px;
}

/* ---------- 卡片网格 ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  color: var(--text-title);
  margin-bottom: 8px;
  font-size: 1.15rem;
  line-height: 1.4;
  font-weight: 600;
  transition: color 0.2s;
}

.card h3:hover {
  color: var(--brand);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card .meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  margin-top: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.card .meta a {
  color: var(--text-link);
  font-weight: 500;
  margin-left: auto;
  transition: color 0.2s;
}

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

.tag {
  background: var(--bg);
  padding: 2px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--text-primary);
  border: 1px solid var(--border);
  font-weight: 500;
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  padding: 0 20px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.active {
  border-color: var(--brand);
  box-shadow: 0 4px 16px rgba(26, 58, 95, 0.08);
}

.faq-q {
  padding: 18px 0;
  font-weight: 600;
  color: var(--text-title);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  transition: color 0.2s;
  user-select: none;
}

.faq-q:hover {
  color: var(--brand);
}

.faq-q span {
  font-size: 0.9rem;
  transition: transform 0.3s ease;
  color: var(--text-secondary);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-q span {
  transform: rotate(180deg);
  color: var(--brand);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--text-primary);
}

.faq-a-inner {
  padding: 0 0 18px;
  border-top: none;
  line-height: 1.7;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.faq-item.active .faq-a {
  max-height: 300px;
}

/* ---------- 新手指南 ---------- */
.guide-box {
  background: var(--surface);
  padding: 28px;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s ease;
}

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

.guide-box h3 {
  color: var(--text-title);
  margin-bottom: 8px;
}

.guide-box h4 {
  color: var(--text-title);
  margin: 16px 0 8px;
  font-weight: 600;
}

.guide-box ol {
  margin-left: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

.guide-box ol li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text-primary);
}

.guide-box ol li:last-child {
  border-bottom: none;
}

.guide-box ol li::marker {
  color: var(--accent);
  font-weight: 700;
}

/* ---------- 联系区域 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.contact-info p {
  margin-bottom: 8px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text-primary);
}

.contact-info p:last-child {
  border-bottom: none;
}

.contact-info strong {
  color: var(--text-title);
  min-width: 100px;
  display: inline-block;
}

.friendly-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.friendly-links a {
  color: var(--text-link);
  padding: 8px 12px;
  background: var(--bg);
  border-radius: 8px;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.friendly-links a:hover {
  background: var(--brand);
  color: white;
  padding-left: 16px;
  border-color: var(--brand);
}

/* ---------- 高亮块 ---------- */
.highlight {
  background: var(--surface);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  border-left: 6px solid var(--accent);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  transition: transform 0.2s ease;
}

.highlight:hover {
  transform: translateX(4px);
}

/* ---------- 表格 ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.info-table th,
.info-table td {
  border: 1px solid var(--border);
  padding: 14px 16px;
  text-align: left;
}

.info-table th {
  background: var(--brand);
  color: white;
  font-weight: 600;
}

.info-table td {
  background: var(--surface);
  color: var(--text-primary);
}

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

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 56px 0 24px;
  position: relative;
}

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

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
}

.footer-col {
  flex: 1;
  min-width: 160px;
}

.footer-col h4 {
  color: #ffffff;
  margin-bottom: 16px;
  font-size: 1.1rem;
  font-weight: 600;
}

.footer-col a {
  color: var(--footer-text);
  font-size: 0.95rem;
  line-height: 2.2;
  transition: color 0.2s, padding-left 0.2s;
  display: inline-block;
}

.footer-col a:hover {
  color: #ffffff;
  padding-left: 6px;
  text-decoration: none;
}

.footer-col p {
  color: var(--footer-text);
  font-size: 0.95rem;
  line-height: 2;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--footer-text);
}

.footer-bottom p {
  margin-bottom: 8px;
}

.footer-bottom a {
  color: var(--footer-text);
  margin: 0 8px;
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: #ffffff;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 30px;
  background: var(--brand);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  border: none;
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--brand-dark);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* ---------- 动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 分隔线 */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

/* 内联图标 */
.icon-svg {
  width: 20px;
  height: 20px;
  vertical-align: middle;
  margin-right: 6px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .banner-text h1 {
    font-size: 2.4rem;
  }
  
  .banner-grid {
    gap: 24px;
  }
  
  .svg-banner {
    width: 240px;
  }
  
  .article-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-links,
  .search-box {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .banner {
    padding: 32px 0;
    border-radius: 0 0 32px 32px;
  }
  
  .banner-grid {
    flex-direction: column;
    text-align: center;
  }
  
  .banner-text h1 {
    font-size: 2rem;
  }
  
  .banner-text p {
    font-size: 1.1rem;
  }
  
  .banner-visual {
    margin-top: 16px;
  }
  
  .svg-banner {
    width: 200px;
  }
  
  .btn-group {
    justify-content: center;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .article-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .card {
    padding: 20px;
  }
  
  .footer-grid {
    gap: 28px;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
  
  .section {
    padding: 40px 0;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .guide-box {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.5rem;
  }
  
  .logo span {
    font-size: 0.85rem;
    padding: 2px 8px;
  }
  
  .theme-toggle,
  .menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
  
  .banner-text h1 {
    font-size: 1.7rem;
  }
  
  .banner-text p {
    font-size: 1rem;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.4rem;
  }
  
  .card h3 {
    font-size: 1.05rem;
  }
  
  .faq-item {
    padding: 0 14px;
  }
  
  .faq-q {
    font-size: 0.95rem;
    padding: 14px 0;
  }
}

/* ---------- 无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--brand);
  border-radius: 8px;
}

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

/* 选中文本 */
::selection {
  background: var(--accent);
  color: white;
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
```