```css
/* ===== 全局重置与设计令牌 ===== */
:root {
  --primary: #1f3a52;
  --primary-dark: #0b1c2e;
  --primary-light: #3b5f7d;
  --accent: #b22234;
  --accent-hover: #8b1a2b;
  --bg: #f0f4f8;
  --bg-card: rgba(255, 255, 255, 0.85);
  --text: #1f2937;
  --text-light: #4a5b6d;
  --border: rgba(31, 58, 82, 0.12);
  --shadow: 0 8px 32px rgba(31, 58, 82, 0.12);
  --shadow-hover: 0 12px 40px rgba(31, 58, 82, 0.2);
  --radius: 20px;
  --radius-sm: 14px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.7);
}

/* 暗色模式变量覆盖 */
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #60a5fa;
    --primary-dark: #93c5fd;
    --primary-light: #3b82f6;
    --accent: #f87171;
    --accent-hover: #ef4444;
    --bg: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.9);
    --text: #e2e8f0;
    --text-light: #94a3b8;
    --border: rgba(148, 163, 184, 0.2);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.7);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.2);
  }
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 90px;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.3s ease;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 20px;
  border: 2px solid var(--bg);
}

/* ===== 通用容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ===== 链接 ===== */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
}

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

/* ===== 标题层级 ===== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin: 2.5rem 0 1.5rem;
  padding-bottom: 0.75rem;
  position: relative;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--primary);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  margin: 1.5rem 0 1rem;
  color: var(--text);
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

p {
  color: var(--text);
  margin-bottom: 1rem;
  line-height: 1.8;
}

/* ===== 卡片组件 ===== */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
  background-size: 200% 100%;
  animation: gradientMove 4s linear infinite;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

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

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

/* ===== 导航栏 ===== */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  flex-wrap: wrap;
  gap: 15px;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--accent);
  font-weight: 700;
}

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

.nav-links a {
  font-weight: 500;
  color: var(--text);
  padding: 8px 16px;
  border-radius: 30px;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  background: var(--primary);
  color: white;
}

.nav-links a:hover::after {
  width: 60%;
}

.menu-icon {
  display: none;
  font-size: 2rem;
  cursor: pointer;
  user-select: none;
  color: var(--text);
  transition: transform 0.3s ease;
}

.menu-icon:hover {
  transform: scale(1.1);
  color: var(--accent);
}

/* 移动端菜单 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 20px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
  border: 1px solid var(--glass-border);
  animation: slideDown 0.3s ease;
}

.mobile-nav a {
  padding: 14px 16px;
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
  border-bottom: 1px solid var(--border);
}

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

.mobile-nav a:hover {
  background: var(--primary);
  color: white;
  padding-left: 24px;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(31, 58, 82, 0.3);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.btn::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:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(31, 58, 82, 0.4);
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

/* ===== Banner 区域 ===== */
header .card {
  background: linear-gradient(135deg, rgba(240, 245, 253, 0.9), rgba(255, 255, 255, 0.9));
  border: none;
  box-shadow: 0 20px 60px rgba(31, 58, 82, 0.15);
  position: relative;
  overflow: hidden;
}

header .card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 80%;
  height: 200%;
  background: radial-gradient(circle, rgba(31, 58, 82, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  header .card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9));
  }
}

/* ===== 徽章 ===== */
.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 6px 18px;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.3px;
  box-shadow: 0 2px 8px rgba(31, 58, 82, 0.2);
}

/* ===== 网格布局 ===== */
.grid-2,
.grid-3 {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ===== 表格样式 ===== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 20px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 14px;
  text-align: left;
  font-weight: 600;
}

td {
  padding: 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

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

tr:hover td {
  background: rgba(31, 58, 82, 0.05);
}

@media (prefers-color-scheme: dark) {
  tr:hover td {
    background: rgba(96, 165, 250, 0.1);
  }
}

/* ===== FAQ 样式 ===== */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  font-size: 1.05rem;
  transition: color 0.3s ease;
}

.faq-question span {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
  color: var(--accent);
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-item.active .faq-question span {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--text-light);
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding-top: 12px;
}

/* ===== 页脚 ===== */
.footer {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #e2e8f0;
  padding: 50px 0 30px;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), transparent, var(--accent));
}

.footer h4 {
  color: white;
  margin-bottom: 15px;
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s ease;
}

.footer a:hover {
  color: white;
  text-decoration: underline;
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 统计数字 ===== */
.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ===== 列表优化 ===== */
ul[style*="list-style: none"],
ul:not([class]) {
  list-style: none;
}

ul[style*="list-style: none"] li,
ul:not([class]) li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  padding-left: 0;
}

ul[style*="list-style: none"] li:last-child,
ul:not([class]) li:last-child {
  border-bottom: none;
}

ul[style*="list-style: none"] li:hover,
ul:not([class]) li:hover {
  padding-left: 12px;
  background: rgba(31, 58, 82, 0.03);
  border-radius: 10px;
}

@media (prefers-color-scheme: dark) {
  ul[style*="list-style: none"] li:hover,
  ul:not([class]) li:hover {
    background: rgba(96, 165, 250, 0.1);
  }
}

/* ===== 有序列表 ===== */
ol {
  padding-left: 24px;
  margin: 16px 0;
}

ol li {
  padding: 8px 0;
  position: relative;
}

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

/* ===== 锚点偏移 ===== */
.anchor-offset {
  scroll-margin-top: 90px;
}

/* ===== 图片占位 ===== */
.img-svg {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: var(--radius-sm);
  width: 100%;
  height: auto;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* ===== 工具类 ===== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* ===== 滚动动画 ===== */
@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);
  }
}

.card {
  animation: fadeInUp 0.6s ease both;
}

.card:nth-child(2) {
  animation-delay: 0.1s;
}

.card:nth-child(3) {
  animation-delay: 0.2s;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-links {
    display: none;
  }
  
  .menu-icon {
    display: block;
  }
  
  .mobile-nav.show {
    display: flex;
  }
  
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .card {
    padding: 20px;
  }
  
  header .card {
    flex-direction: column;
    text-align: center;
  }
  
  header .card > div {
    min-width: 100% !important;
  }
  
  header .card svg {
    max-width: 180px;
    margin: 20px auto 0;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  .card {
    padding: 16px;
    border-radius: 16px;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.3rem;
  }
  
  .footer {
    padding: 30px 0 20px;
  }
  
  .footer .container {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}

/* ===== 打印优化 ===== */
@media print {
  .navbar,
  .footer,
  .btn,
  .menu-icon {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ===== 无障碍 ===== */
@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;
  }
}

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

/* ===== 选择文本 ===== */
::selection {
  background: var(--primary);
  color: white;
}

/* ===== 高对比度模式 ===== */
@media (forced-colors: active) {
  .btn,
  .nav-links a:hover {
    border: 2px solid ButtonText;
  }
}
```