```css
/* ===== 全局变量与重置 ===== */
:root {
  --bg-light: #F8FAFC;
  --bg-dark: #0F172A;
  --surface-light: #FFFFFF;
  --surface-dark: #1E293B;
  --text-primary-light: #17202A;
  --text-secondary-light: #243447;
  --text-muted-light: #334155;
  --text-primary-dark: #F1F5F9;
  --text-secondary-dark: #E2E8F0;
  --text-muted-dark: #CBD5E1;
  --border-light: #E2E8F0;
  --border-dark: #334155;
  --brand: #1F3A5F;
  --brand-light: #2D4F7A;
  --brand-dark: #14283F;
  --accent: #D4A373;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius: 16px;
  --transition: 0.3s ease;
  --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);
}

[data-theme="dark"] {
  --bg-light: #0F172A;
  --bg-dark: #0F172A;
  --surface-light: #1E293B;
  --surface-dark: #1E293B;
  --text-primary-light: #F1F5F9;
  --text-secondary-light: #E2E8F0;
  --text-muted-light: #CBD5E1;
  --border-light: #334155;
  --brand: #3B5B8C;
  --brand-light: #4A6FA3;
  --brand-dark: #1F3A5F;
  --accent: #E2B185;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary-light);
  line-height: 1.7;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--surface-light);
  box-shadow: var(--shadow);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition), border-color var(--transition);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background-color: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--brand);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary-light);
  position: relative;
  padding: 8px 0;
}

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

.nav-links a:hover {
  color: var(--brand);
}

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

.nav-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  color: var(--text-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
}

.icon-btn:hover {
  background: var(--border-light);
  transform: scale(1.1);
}

.menu-toggle {
  display: none;
}

/* 移动菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface-light);
  padding: 16px;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background-color: var(--glass-bg);
}

.mobile-menu a {
  padding: 8px 0;
  font-weight: 500;
  color: var(--text-secondary-light);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .mobile-menu.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }
}

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

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 40px;
  padding: 4px 12px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-box:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(31, 58, 95, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 8px 4px;
  font-size: 0.9rem;
  color: var(--text-primary-light);
  outline: none;
  width: 140px;
}

.search-box input::placeholder {
  color: var(--text-muted-light);
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--brand);
  transition: transform 0.2s;
}

.search-box button:hover {
  transform: scale(1.2);
}

/* ===== 主视觉 ===== */
.hero {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand), var(--brand-light));
  color: white;
  border-radius: 24px;
  margin: 24px 0;
  padding: 48px 40px;
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  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%);
  animation: heroPulse 8s ease-in-out infinite;
}

@keyframes heroPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

.hero-content {
  flex: 1 1 300px;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  background: linear-gradient(90deg, #ffffff, #e2e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease;
}

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

.hero-content p {
  font-size: 1.1rem;
  color: #e2e8f0;
  margin-top: 16px;
  max-width: 600px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 28px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
  background: var(--accent);
  color: #1F2937;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

.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;
}

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

.btn-outline {
  background: transparent;
  border: 2px solid white;
  color: white;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.hero-visual {
  flex: 1 1 200px;
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.hero-visual svg {
  width: 220px;
  height: auto;
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.3));
  animation: float 3s ease-in-out infinite;
}

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

/* ===== 卡片与区块 ===== */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 48px 0 24px;
  color: var(--text-primary-light);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 40%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--surface-light);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

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

.card h3 {
  color: var(--brand);
  font-size: 1.4rem;
  margin-bottom: 12px;
}

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

.badge {
  display: inline-block;
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
  color: white;
  padding: 4px 12px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: transform 0.2s;
}

.badge:hover {
  transform: scale(1.05);
}

/* ===== 表格 ===== */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface-light);
  border-radius: 12px;
}

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

th {
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
  color: white;
  font-weight: 600;
}

td {
  color: var(--text-secondary-light);
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 16px 0;
  transition: background 0.3s;
}

.faq-item:hover {
  background: rgba(0, 0, 0, 0.02);
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  color: var(--text-primary-light);
  user-select: none;
}

.faq-answer {
  margin-top: 12px;
  color: var(--text-secondary-light);
  line-height: 1.8;
  display: none;
  animation: fadeIn 0.3s ease;
}

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

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

.faq-question::after {
  content: '+';
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--brand);
  transition: transform 0.3s;
}

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

/* ===== 页脚 ===== */
.site-footer {
  background: var(--surface-light);
  border-top: 1px solid var(--border-light);
  margin-top: 60px;
  padding: 40px 0 20px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background-color: var(--glass-bg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-grid h4 {
  color: var(--text-primary-light);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

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

.footer-grid p,
.footer-grid li {
  color: var(--text-secondary-light);
}

.footer-grid a {
  color: var(--text-secondary-light);
  transition: color 0.2s, padding-left 0.2s;
}

.footer-grid a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  margin-top: 24px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  color: var(--text-muted-light);
}

/* ===== 工具类 ===== */
.text-muted {
  color: var(--text-muted-light);
}

.mt-4 {
  margin-top: 16px;
}

.mt-6 {
  margin-top: 24px;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.article-card .date {
  font-size: 0.85rem;
  color: var(--text-muted-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-card .date::before {
  content: '📅';
  font-size: 0.9rem;
}

.article-card a {
  margin-top: auto;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s, transform 0.7s;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 返回顶部 ===== */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  color: white;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  display: none;
  z-index: 99;
  transition: transform 0.3s, box-shadow 0.3s;
}

#backTop:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* ===== 暗黑模式调整 ===== */
[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #0F172A, #1F3A5F, #2D4F7A);
}

[data-theme="dark"] .hero-content h1,
[data-theme="dark"] .hero-content p {
  color: #F1F5F9;
}

[data-theme="dark"] .btn-outline {
  border-color: #E2E8F0;
  color: #E2E8F0;
}

[data-theme="dark"] .card {
  background: var(--surface-dark);
  border-color: var(--border-dark);
}

[data-theme="dark"] th {
  background: linear-gradient(90deg, var(--brand-dark), var(--brand));
}

[data-theme="dark"] .site-footer {
  background: var(--surface-dark);
  border-color: var(--border-dark);
}

[data-theme="dark"] .footer-grid h4 {
  color: var(--text-primary-dark);
}

[data-theme="dark"] .footer-grid p,
[data-theme="dark"] .footer-grid li {
  color: var(--text-secondary-dark);
}

[data-theme="dark"] .footer-bottom {
  border-color: var(--border-dark);
  color: var(--text-muted-dark);
}

[data-theme="dark"] .faq-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 32px 24px;
    flex-direction: column;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-cta {
    justify-content: center;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

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

  .nav-actions {
    gap: 8px;
  }

  .icon-btn {
    padding: 6px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 24px 16px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .hero-visual svg {
    width: 160px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .card {
    padding: 20px;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .search-box {
    display: none;
  }

  .logo {
    font-size: 1.3rem;
  }

  .logo svg {
    width: 32px;
    height: 32px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .site-header,
  .site-footer,
  #backTop,
  .hero-cta,
  .search-box,
  .nav-actions {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .hero {
    background: white;
    color: black;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .hero-content h1,
  .hero-content p {
    color: black;
    text-shadow: none;
  }
}

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

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-radius: 4px;
}

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

/* ===== 选择文字样式 ===== */
::selection {
  background: var(--brand);
  color: white;
}

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