```css
/* ===== 基础视觉变量 - 高可读性 ===== */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f7fb;
  --bg-card: #ffffff;
  --bg-footer: #1b2a3a;
  --text-primary: #1F2937;   /* 深灰蓝，正文高对比 */
  --text-secondary: #3d4c5f; /* 辅助文字，依然清晰 */
  --text-heading: #111827;   /* 更深色标题 */
  --text-link: #1e4b7a;      /* 深蓝链接 */
  --text-on-dark: #f0f4fa;   /* 深色背景上的亮色文字 */
  --text-footer: #d1dce8;    /* footer 亮色 */
  --border-light: #d4dce6;
  --brand-primary: #1a3a5f;  /* 深蓝品牌色 */
  --accent: #2c5f8a;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --radius: 12px;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --gradient-primary: linear-gradient(145deg, #1a3a5f, #2c5f8a);
  --gradient-banner: linear-gradient(145deg, #1a3a5f 0%, #2c5f8a 50%, #3a7bd5 100%);
}

/* 暗黑模式变量 */
html[data-theme="dark"] {
  --bg-primary: #0f1722;
  --bg-secondary: #1e293b;
  --bg-card: #1f2937;
  --bg-footer: #0b1219;
  --text-primary: #E2E8F0;
  --text-secondary: #cbd5e1;
  --text-heading: #F8FAFC;
  --text-link: #93c5fd;
  --text-on-dark: #f1f5f9;
  --text-footer: #b6c8dc;
  --border-light: #334155;
  --brand-primary: #3b82f6;
  --accent: #60a5fa;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(148, 163, 184, 0.2);
  --gradient-primary: linear-gradient(145deg, #0f1722, #1e293b);
  --gradient-banner: linear-gradient(145deg, #1e293b 0%, #2c5f8a 50%, #3b82f6 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.3s, color 0.3s;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--text-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

h1 { font-size: 2.2rem; letter-spacing: 0.5px; }
h2 { font-size: 1.9rem; margin-top: 2.2rem; border-left: 6px solid var(--accent); padding-left: 0.8rem; }
h3 { font-size: 1.4rem; margin-top: 1.8rem; }
h4 { font-size: 1.1rem; font-weight: 600; }

p { margin-bottom: 1.2rem; color: var(--text-primary); }

a { color: var(--text-link); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* 按钮 */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(44, 95, 138, 0.3);
}

.btn:hover {
  background: #1f4a6e;
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(44, 95, 138, 0.4);
}

/* 卡片 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

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

/* 毛玻璃效果 */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
}

/* 导航 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-heading);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.logo span { color: var(--accent); -webkit-text-fill-color: var(--accent); }

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

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

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

.menu-btn {
  display: none;
  background: none;
  border: 2px solid var(--border-light);
  border-radius: 30px;
  padding: 4px 12px;
  font-size: 1.2rem;
  color: var(--text-heading);
  cursor: pointer;
  transition: all 0.3s ease;
}

.menu-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-light);
  animation: slideDown 0.3s ease;
}

.mobile-menu a {
  color: var(--text-primary);
  padding: 0.3rem 0;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.mobile-menu a:hover {
  color: var(--accent);
  padding-left: 10px;
  text-decoration: none;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 搜索 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  padding: 0.2rem 0.2rem 0.2rem 1rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(44, 95, 138, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  font-size: 1rem;
  padding: 0.6rem 0;
  width: 180px;
  color: var(--text-primary);
  outline: none;
  transition: width 0.3s ease;
}

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

.search-box button {
  background: var(--gradient-primary);
  border: none;
  border-radius: 50px;
  padding: 0.45rem 1.2rem;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.search-box button:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(44, 95, 138, 0.3);
}

/* 轮播 */
.banner {
  background: var(--gradient-banner);
  border-radius: 20px;
  padding: 3rem 2.5rem;
  margin: 2rem 0;
  color: white;
  position: relative;
  overflow: hidden;
  animation: gradientShift 8s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: float 10s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-30px, 20px) rotate(10deg); }
}

.banner h2 {
  color: white;
  border-left: none;
  font-size: 2.5rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.banner p {
  color: #eef3fa;
  font-size: 1.1rem;
  max-width: 600px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.banner .btn {
  background: #f0b84b;
  color: #1f2937;
  box-shadow: 0 4px 12px rgba(240, 184, 75, 0.3);
}

.banner .btn:hover {
  background: #e0a83b;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(240, 184, 75, 0.4);
}

/* 卡片网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.8rem;
  margin: 2rem 0;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

/* 数字动画 */
.stats {
  display: flex;
  gap: 3rem;
  background: var(--bg-secondary);
  border-radius: 20px;
  padding: 2rem;
  justify-content: space-around;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: 1rem;
  border-radius: 12px;
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1rem 0;
  transition: background 0.3s ease;
}

.faq-item:hover {
  background: var(--bg-secondary);
  border-radius: 8px;
  padding-left: 1rem;
  padding-right: 1rem;
}

.faq-q {
  font-weight: 600;
  cursor: pointer;
  color: var(--text-heading);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.3s ease;
}

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

.faq-q span {
  transition: transform 0.3s ease;
  font-size: 0.8rem;
}

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

.faq-a {
  display: none;
  padding-top: 0.8rem;
  color: var(--text-primary);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.faq-item.active .faq-a {
  display: block;
}

/* Footer */
footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: 3rem 0 1.5rem;
  margin-top: 3rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

footer a {
  color: #b7d0e8;
  transition: color 0.3s ease, transform 0.3s ease;
  display: inline-block;
}

footer a:hover {
  color: white;
  text-decoration: none;
  transform: translateX(4px);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
}

.footer-grid h4 {
  color: white;
  margin-bottom: 1rem;
  position: relative;
}

.footer-grid h4::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.footer-bottom {
  border-top: 1px solid #334155;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  font-size: 0.9rem;
  text-align: center;
}

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

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  text-align: left;
  transition: background 0.3s ease;
}

th {
  background: var(--bg-secondary);
  color: var(--text-heading);
  font-weight: 600;
}

td {
  color: var(--text-primary);
}

tr:hover td {
  background: var(--bg-secondary);
}

/* 图片占位 */
.svg-img {
  background: linear-gradient(145deg, #e2e8f0, #cbd5e1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  min-height: 120px;
  color: var(--text-heading);
  transition: transform 0.3s ease;
}

.svg-img:hover {
  transform: scale(1.02);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(44, 95, 138, 0.3);
  border: none;
  font-size: 1.2rem;
}

.to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(44, 95, 138, 0.4);
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 暗黑模式按钮 */
.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  padding: 6px 16px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.05);
}

/* 新闻列表样式 */
.news-list {
  list-style: none;
  line-height: 2.2;
}

.news-list li {
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-light);
  transition: padding-left 0.3s ease;
}

.news-list li:hover {
  padding-left: 10px;
}

.news-list a {
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.news-list a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* 链接组样式 */
.link-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.95rem;
}

.link-group a {
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  transition: all 0.3s ease;
  background: var(--bg-secondary);
}

.link-group a:hover {
  background: var(--accent);
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
}

/* 联系人卡片 */
.contact-card {
  text-align: center;
  padding: 2rem;
}

.contact-card h4 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.contact-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 播放按钮动画 */
.play-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(44, 95, 138, 0.3);
}

.play-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(44, 95, 138, 0.4);
}

/* 移动端适配 */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .mobile-menu.open { display: flex; }
  
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }
  
  .container { padding: 0 14px; }
  
  .banner {
    padding: 2rem 1.5rem;
    margin: 1rem 0;
  }
  
  .banner h2 {
    font-size: 1.8rem;
  }
  
  .banner p {
    font-size: 1rem;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .card {
    padding: 1.2rem;
  }
  
  .stats {
    gap: 1.5rem;
    padding: 1.5rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .search-box input {
    width: 120px;
  }
  
  .search-box input:focus {
    width: 150px;
  }
  
  .to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }
  
  .footer-grid h4::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .link-group {
    justify-content: center;
    gap: 1rem;
  }
  
  .news-list li {
    font-size: 0.9rem;
  }
}

/* 平板适配 */
@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .nav-links {
    gap: 1.2rem;
  }
  
  .nav-links a {
    font-size: 0.9rem;
  }
}

/* 动画增强 */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 10px;
  transition: background 0.3s ease;
}

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

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

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

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

/* 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;
  }
  
  .reveal {
    opacity: 1;
    transform: none;
  }
}
```