```css
/* ---------- 设计令牌 ---------- */
:root {
  --bg-primary: #F9F7F1;
  --bg-card: #FFFFFF;
  --bg-deep: #0B3B2C;
  --bg-banner: linear-gradient(135deg, #1F4A3A, #0B3B2C);
  --text-primary: #1F2937;
  --text-secondary: #2F3E4E;
  --text-tertiary: #4B5E6D;
  --text-invert: #FFFFFF;
  --text-invert-soft: #E2E8F0;
  --accent: #B47C3C;
  --accent-dark: #8A5A28;
  --border-light: #D6D3C9;
  --nav-bg: rgba(255, 255, 255, 0.92);
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.05);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #12181F;
  --bg-card: #1E2733;
  --bg-deep: #0A1A14;
  --bg-banner: linear-gradient(135deg, #1A2E26, #0B1F18);
  --text-primary: #F1F5F9;
  --text-secondary: #E2E8F0;
  --text-tertiary: #CBD5E1;
  --text-invert: #FFFFFF;
  --text-invert-soft: #E2E8F0;
  --accent: #D9A45B;
  --accent-dark: #F0C987;
  --border-light: #334155;
  --nav-bg: rgba(18, 24, 31, 0.92);
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.5);
}

/* ---------- 基础 ---------- */
* {
  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;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: 2.6rem;
  color: var(--text-invert);
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
  animation: fadeInDown 0.8s ease;
}

h2 {
  font-size: 2.2rem;
  border-left: 6px solid var(--accent);
  padding-left: 1rem;
  margin: 2rem 0 1.2rem;
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
  animation: slideIn 0.6s ease;
}

h3 {
  font-size: 1.5rem;
  margin: 1.8rem 0 0.8rem;
  color: var(--text-primary);
}

h4 {
  font-size: 1.2rem;
  margin: 1.2rem 0 0.5rem;
  color: var(--text-secondary);
}

p {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

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

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

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

a:hover::after {
  width: 100%;
}

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

/* ---------- 导航 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
  transition: transform 0.3s ease;
  display: inline-block;
}

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

.logo span {
  color: var(--accent-dark);
}

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

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  position: relative;
  transition: color 0.3s;
}

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

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

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

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 40px;
  padding: 4px 8px;
  transition: box-shadow 0.3s, border-color 0.3s;
}

.search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(180, 124, 60, 0.2);
  border-color: var(--accent);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 8px 10px;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  width: 140px;
  transition: width 0.3s;
}

.search-box input:focus {
  width: 180px;
}

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

.search-box button:hover {
  background: var(--accent-dark);
  transform: scale(1.05);
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  padding: 8px 16px;
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.theme-toggle:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: transform 0.3s;
}

.menu-toggle:hover {
  transform: rotate(90deg);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    padding: 20px;
    gap: 12px;
    box-shadow: var(--shadow-md);
    border-radius: 0 0 20px 20px;
    animation: slideDown 0.3s ease;
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .search-box input {
    width: 100px;
  }
  
  .search-box input:focus {
    width: 140px;
  }
}

/* ---------- Banner ---------- */
.banner {
  background: var(--bg-banner);
  color: white;
  padding: 3rem 0 4rem;
  border-radius: 0 0 40px 40px;
  position: relative;
  overflow: hidden;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

.banner-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: center;
  position: relative;
}

.banner h1 {
  margin-bottom: 1rem;
  font-size: 3rem;
  background: linear-gradient(135deg, #fff 0%, #F0C987 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease;
}

.banner p {
  color: var(--text-invert-soft);
  font-size: 1.2rem;
  max-width: 600px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-cta {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
  background: var(--accent);
  color: white;
  padding: 12px 28px;
  border-radius: 40px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}

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

.btn:hover {
  background: var(--accent-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

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

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.banner svg {
  width: 100%;
  height: auto;
  max-width: 400px;
  animation: float 4s ease-in-out infinite;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.2));
}

/* ---------- 卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.card h3 {
  margin-top: 0;
  color: var(--text-primary);
  transition: color 0.3s;
}

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

.card p {
  color: var(--text-secondary);
  transition: color 0.3s;
}

.card:hover p {
  color: var(--text-primary);
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.2rem 1.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s;
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  padding: 1rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  color: var(--text-primary);
  transition: color 0.3s;
}

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

.faq-question span {
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform 0.3s;
  color: var(--accent);
}

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

.faq-answer {
  padding-bottom: 1.2rem;
  color: var(--text-secondary);
  animation: slideDown 0.4s ease;
}

.faq-answer p {
  margin-bottom: 0.5rem;
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

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

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

th {
  background: var(--bg-deep);
  color: var(--text-invert);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.9rem;
}

td {
  color: var(--text-secondary);
  transition: background 0.2s;
}

tr:hover td {
  background: rgba(180, 124, 60, 0.05);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 1rem 0;
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

.breadcrumb a {
  color: var(--accent-dark);
  transition: color 0.2s;
}

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

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-deep);
  color: var(--text-invert-soft);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-radius: 40px 40px 0 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer a {
  color: var(--text-invert-soft);
  transition: color 0.2s, padding-left 0.2s;
}

.footer a:hover {
  color: white;
  padding-left: 5px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer h4 {
  color: white;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

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

.footer p, .footer li {
  color: var(--text-invert-soft);
  font-size: 0.95rem;
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: 0.5rem;
  transition: transform 0.2s;
}

.footer li:hover {
  transform: translateX(5px);
}

.copyright {
  border-top: 1px solid #2A4A3A;
  margin-top: 2rem;
  padding-top: 1.5rem;
  text-align: center;
  color: var(--text-invert-soft);
  font-size: 0.9rem;
}

/* ---------- 其他 ---------- */
.section {
  margin: 3rem 0;
  position: relative;
}

.badge {
  background: var(--accent);
  color: white;
  border-radius: 30px;
  padding: 2px 12px;
  font-size: 0.8rem;
  display: inline-block;
  transition: transform 0.2s;
}

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

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 40px;
  width: 48px;
  height: 48px;
  font-size: 1.8rem;
  cursor: pointer;
  opacity: 0.9;
  z-index: 999;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.back-to-top:hover {
  opacity: 1;
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  background: var(--accent-dark);
}

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

.back-to-top.hide {
  opacity: 0;
  visibility: hidden;
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

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

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

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

@keyframes slideIn {
  from {
    width: 0;
  }
  to {
    width: 60px;
  }
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  .banner-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .banner h1 {
    font-size: 2.2rem;
  }
  
  .banner p {
    margin: 0 auto;
  }
  
  .banner-cta {
    justify-content: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.5rem;
  }
}

@media (max-width: 500px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .nav-actions .search-box {
    display: none;
  }
  
  .banner {
    border-radius: 0 0 20px 20px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 16px;
  }
}

/* ---------- 暗黑模式 ---------- */
[data-theme="dark"] .card, 
[data-theme="dark"] .faq-item, 
[data-theme="dark"] table {
  background: var(--bg-card);
}

[data-theme="dark"] .btn {
  color: #0B1F18;
}

[data-theme="dark"] .footer {
  background: #0A1A14;
}

[data-theme="dark"] .banner {
  background: linear-gradient(135deg, #1A2E26, #0B1F18);
}

[data-theme="dark"] .search-box input {
  color: var(--text-primary);
}

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

[data-theme="dark"] .theme-toggle:hover {
  color: white;
}

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

::selection {
  background: var(--accent);
  color: white;
}

::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}

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

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