```css
:root {
  --bg1: #f5f7fb;
  --bg2: #ffffff;
  --card-bg: #ffffff;
  --text-strong: #1a2634;
  --text-body: #243447;
  --text-secondary: #3a4a5c;
  --text-footer: #d1dce6;
  --brand: #0f3b5e;
  --brand-accent: #1d5b8e;
  --border-light: #dce3ec;
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
  --nav-bg: #ffffff;
  --footer-bg: #0b1e2b;
  --btn-bg: #1d5b8e;
  --btn-text: #ffffff;
  --hero-text: #f0f6fc;
  --tag-bg: #e7edf5;
  --dark-bg: #12181f;
  --dark-card: #1d262f;
  --dark-text: #e2e8f0;
  --dark-heading: #f8fafc;
  --dark-secondary: #b0c4d8;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --accent-1: #f0b90b;
  --accent-2: #ff6b6b;
  --accent-3: #4ecdc4;
  --gradient-hero: linear-gradient(135deg, #0b1e2b 0%, #1d4b6e 50%, #2d6a9f 100%);
  --gradient-card: linear-gradient(145deg, #ffffff, #f0f4fa);
  --gradient-title: linear-gradient(135deg, #1d5b8e, #0f3b5e);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg1);
  color: var(--text-body);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', sans-serif;
  line-height: 1.6;
  transition: background 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

body.dark {
  background: var(--dark-bg);
  color: var(--dark-text);
}

body.dark .card,
body.dark .article-card,
body.dark .faq-item,
body.dark .howto-box,
body.dark .info-box {
  background: var(--dark-card);
  border-color: #2b3a48;
  color: var(--dark-text);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

body.dark h1,
body.dark h2,
body.dark h3,
body.dark h4,
body.dark .nav-links a,
body.dark .logo {
  color: var(--dark-heading) !important;
}

body.dark .meta,
body.dark .publish-date,
body.dark .faq-q,
body.dark .article-excerpt {
  color: var(--dark-secondary) !important;
}

body.dark .footer {
  background: #0b141c;
}

body.dark .navbar {
  background: rgba(24, 34, 45, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

body.dark .search-box {
  background: rgba(30, 42, 53, 0.8);
  border-color: #3a4c5e;
}

body.dark .dark-toggle {
  border-color: #4b5f73;
  color: var(--dark-text);
}

body.dark th {
  background: #1d2a36;
  color: var(--dark-heading);
}

body.dark td {
  border-top-color: #2b3b4a;
  color: var(--dark-text);
}

body.dark .mobile-menu-btn {
  color: var(--dark-heading);
}

body.dark .mobile-nav-open {
  background: #18222d;
}

body.dark .search-box input {
  color: var(--dark-text);
}

body.dark .search-box input::placeholder {
  color: var(--dark-secondary);
}

body.dark .footer a {
  color: #c3d7e8;
}

body.dark .footer h4 {
  color: #ffffff;
}

body.dark .copy {
  color: #9ab0c2;
  border-top-color: #2a4152;
}

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

h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h3 {
  font-size: 1.2rem;
}

h4 {
  font-size: 1.05rem;
}

p {
  color: var(--text-body);
  line-height: 1.7;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 导航栏 */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: all 0.3s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  height: 68px;
}

.logo {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.02);
}

.logo span {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  transition: all 0.3s ease;
}

.nav-links a {
  color: var(--text-body);
  font-weight: 550;
  font-size: 1rem;
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-accent), var(--accent-1));
  transition: width 0.3s ease;
}

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

body.dark .nav-links a {
  color: var(--dark-text);
}

.actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-box {
  display: flex;
  background: var(--bg1);
  border-radius: 30px;
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(29, 91, 142, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 6px 12px;
  font-size: 0.9rem;
  color: var(--text-body);
  outline: none;
  width: 180px;
  transition: width 0.3s ease;
}

.search-box input:focus {
  width: 220px;
}

.search-box button {
  background: linear-gradient(135deg, var(--btn-bg), var(--brand));
  border: none;
  color: white;
  border-radius: 30px;
  padding: 6px 14px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}

.search-box button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(29, 91, 142, 0.3);
}

.dark-toggle {
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 30px;
  padding: 6px 14px;
  cursor: pointer;
  color: var(--text-body);
  font-weight: 500;
  transition: all 0.3s ease;
}

.dark-toggle:hover {
  background: var(--tag-bg);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--text-strong);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.mobile-menu-btn:hover {
  transform: scale(1.1);
}

/* 移动端导航 */
@media (max-width: 900px) {
  .nav-links,
  .actions .search-box {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .mobile-nav-open {
    display: flex;
    flex-direction: column;
    background: var(--nav-bg);
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    padding: 20px;
    gap: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  
  .mobile-nav-open a {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
  }
  
  .mobile-nav-open a:last-child {
    border-bottom: none;
  }
  
  body.dark .mobile-nav-open {
    background: #18222d;
  }
}

/* Hero 区域 */
.hero {
  background: var(--gradient-hero);
  border-radius: 0 0 40px 40px;
  padding: 56px 0 48px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlow 8s ease-in-out infinite;
}

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

.hero-content {
  max-width: 800px;
  color: var(--hero-text);
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease;
}

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

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.2;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: 1.2rem;
  color: #d4e1ed;
  margin-bottom: 24px;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
}

.hero .btn {
  background: linear-gradient(135deg, var(--accent-1), #ffd700);
  color: #0b1e2b;
  padding: 14px 36px;
  border-radius: 40px;
  font-weight: 600;
  display: inline-block;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(240, 185, 11, 0.3);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.hero .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(240, 185, 11, 0.4);
  text-decoration: none;
}

/* 区块标题 */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 48px 0 16px;
  border-left: 6px solid var(--brand-accent);
  padding-left: 18px;
  position: relative;
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 18px;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent), var(--accent-1));
  border-radius: 2px;
}

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

.card {
  background: var(--gradient-card);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-accent), var(--accent-1), var(--accent-2));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

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

.card h3 {
  margin-bottom: 12px;
  color: var(--text-strong);
  font-weight: 700;
}

.card p {
  color: var(--text-body);
  line-height: 1.6;
}

/* 信息框 */
.info-box {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  line-height: 1.8;
}

.info-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.info-box strong {
  color: var(--text-strong);
  font-weight: 700;
}

/* 文章卡片 */
.article-card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
}

.article-card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
  line-height: 1.4;
  transition: color 0.2s ease;
}

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

.publish-date {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: inline-block;
  padding: 2px 10px;
  background: var(--tag-bg);
  border-radius: 20px;
  font-weight: 500;
}

.article-excerpt {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.read-more {
  display: inline-block;
  margin-top: 12px;
  font-weight: 600;
  color: var(--brand-accent);
  transition: all 0.3s ease;
  position: relative;
}

.read-more::after {
  content: ' →';
  transition: transform 0.3s ease;
  display: inline-block;
}

.read-more:hover {
  color: var(--brand);
  text-decoration: none;
  transform: translateX(4px);
}

/* FAQ */
.faq-item {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  margin-bottom: 16px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: fadeIn 0.5s ease;
}

.faq-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.faq-q {
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.faq-a {
  margin-bottom: 8px;
  padding-left: 8px;
  color: var(--text-body);
  line-height: 1.6;
}

/* HowTo 框 */
.howto-box {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: fadeIn 0.6s ease;
}

.howto-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.howto-box h4 {
  color: var(--text-strong);
  margin-bottom: 12px;
  margin-top: 16px;
  font-weight: 600;
}

.howto-box ul,
.howto-box ol {
  margin-left: 24px;
  margin-bottom: 12px;
  color: var(--text-body);
}

.howto-box li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.howto-box p {
  margin-bottom: 8px;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border-radius: 14px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 14px;
  overflow: hidden;
}

th {
  background: linear-gradient(135deg, #eef2f7, #e0e8f0);
  color: var(--text-strong);
  font-weight: 600;
  padding: 12px;
  text-align: left;
  border-bottom: 2px solid var(--border-light);
}

td {
  padding: 12px;
  border-top: 1px solid var(--border-light);
  color: var(--text-body);
}

tr:hover td {
  background: rgba(29, 91, 142, 0.03);
}

/* Footer */
.footer {
  background: linear-gradient(135deg, var(--footer-bg), #0d2436);
  color: #b8cdde;
  padding: 48px 24px 24px;
  margin-top: 64px;
  border-radius: 32px 32px 0 0;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent), var(--accent-1), var(--accent-2));
}

.footer a {
  color: #c3d7e8;
  transition: color 0.3s ease;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer h4 {
  color: #ffffff;
  margin-bottom: 16px;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 8px;
}

.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent-1);
}

.copy {
  border-top: 1px solid #2a4152;
  margin-top: 32px;
  padding-top: 20px;
  text-align: center;
  color: #9ab0c2;
  font-size: 0.9rem;
}

/* 数字统计 */
.stat-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--brand-accent);
  line-height: 1.2;
  transition: transform 0.3s ease;
}

.stat-number:hover {
  transform: scale(1.05);
}

/* 返回顶部按钮 */
#backTop {
  position: fixed;
  bottom: 40px;
  right: 30px;
  background: linear-gradient(135deg, var(--btn-bg), var(--brand));
  color: white;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 999;
  display: none;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
}

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

#backTop:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(29, 91, 142, 0.4);
}

/* 图片 */
img,
svg {
  max-width: 100%;
  height: auto;
}

/* 滚动动画 - 适用于滚动进入视口的元素 */
.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);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .navbar {
    padding: 0 16px;
  }
  
  .nav-inner {
    height: 60px;
  }
  
  .logo {
    font-size: 1.4rem;
  }
  
  .hero {
    padding: 40px 0 32px;
    border-radius: 0 0 24px 24px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.4rem;
    margin: 32px 0 12px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .faq-item,
  .article-card,
  .info-box,
  .howto-box {
    padding: 16px;
    border-radius: 14px;
  }
  
  .footer {
    padding: 32px 16px 16px;
    border-radius: 24px 24px 0 0;
    margin-top: 48px;
  }
  
  .search-box input:focus {
    width: 140px;
  }
  
  .dark-toggle {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
  
  #backTop {
    bottom: 20px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.6rem;
  }
  
  .hero p {
    font-size: 0.95rem;
  }
  
  .hero .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.2rem;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .actions {
    gap: 6px;
  }
  
  .search-box {
    display: none;
  }
}

/* 打印优化 */
@media print {
  .navbar,
  .footer,
  #backTop,
  .hero .btn,
  .search-box,
  .dark-toggle,
  .mobile-menu-btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card,
  .info-box,
  .article-card,
  .faq-item,
  .howto-box {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  .hero {
    background: white;
    color: black;
    padding: 20px 0;
  }
  
  .hero h1,
  .hero p {
    color: black;
  }
}

/* 高对比度可访问性 */
@media (prefers-contrast: more) {
  :root {
    --text-body: #000000;
    --text-secondary: #000000;
    --brand-accent: #0044aa;
  }
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 毛玻璃效果 */
.glass-effect {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

body.dark .glass-effect {
  background: rgba(29, 38, 47, 0.7);
  border-color: rgba(255, 255, 255, 0.1);
}

/* 渐变边框卡片 */
.gradient-border {
  position: relative;
  background: var(--card-bg);
  border-radius: 18px;
}

.gradient-border::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, var(--brand-accent), var(--accent-1));
  border-radius: 20px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gradient-border:hover::before {
  opacity: 1;
}

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

::-webkit-scrollbar-track {
  background: var(--bg1);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--brand-accent), var(--brand));
  border-radius: 5px;
}

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

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

body.dark ::-webkit-scrollbar-thumb {
  background: var(--dark-secondary);
}
```