```css
/* ============================================
   妖精网站 - 完整样式表
   域名: legongkaiwu.com.cn
   设计: 渐变Banner / 圆角卡片 / 毛玻璃 / 响应式 / 暗色模式
   ============================================ */

/* ---------- 全局变量 ---------- */
:root {
  --bg: #ffffff;
  --bg-elev: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #334155;
  --text-muted: #475569;
  --heading-color: #0f172a;
  --accent: #2563eb;
  --accent-dark: #1e40af;
  --border-light: #e2e8f0;
  --nav-bg: rgba(255,255,255,0.92);
  --card-bg: #ffffff;
  --footer-bg: #0f172a;
  --footer-text: #e2e8f0;
  --footer-link: #bfdbfe;
  --btn-text: #ffffff;
  --code-bg: #f1f5f9;
  --shadow-sm: 0 4px 10px rgba(0,0,0,0.02);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --gradient-hero: linear-gradient(145deg, #e0f2fe 0%, #ffffff 50%, #f0f9ff 100%);
  --gradient-card: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  --gradient-btn: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0b1120;
  --bg-elev: #1e293b;
  --text-primary: #e2e8f0;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --heading-color: #f8fafc;
  --accent: #3b82f6;
  --accent-dark: #60a5fa;
  --border-light: #334155;
  --nav-bg: rgba(15, 23, 42, 0.92);
  --card-bg: #1e293b;
  --footer-bg: #020617;
  --footer-text: #cbd5e1;
  --footer-link: #93c5fd;
  --btn-text: #ffffff;
  --code-bg: #0f172a;
  --shadow-sm: 0 4px 10px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.5);
  --gradient-hero: linear-gradient(145deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  --gradient-card: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --gradient-btn: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.3s, color 0.3s;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--heading-color) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.8rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 1.5rem;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 0.4rem;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
}

h3 {
  font-size: 1.25rem;
  margin-top: 1rem;
}

h4 {
  font-size: 1.1rem;
  margin-top: 0.8rem;
  color: var(--text-secondary);
}

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

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

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

/* ---------- 布局容器 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.section {
  padding: 4rem 0;
}

/* ---------- 头部导航 ---------- */
header {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.3s;
}

header:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 1rem;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--heading-color);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 2px;
}

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

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

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

/* 导航工具按钮 */
.menu-btn, .dark-toggle, .search-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  margin-left: 0.5rem;
  padding: 0.5rem;
  border-radius: 8px;
  transition: background 0.2s;
}

.menu-btn:hover, .dark-toggle:hover, .search-btn:hover {
  background: var(--bg-elev);
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-elev);
  border-radius: 30px;
  padding: 0.3rem 1rem;
  border: 1px solid var(--border-light);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  width: 180px;
  font-size: 0.95rem;
}

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

/* 移动菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--card-bg);
  padding: 1rem;
  gap: 0.8rem;
  border-top: 1px solid var(--border-light);
  animation: slideDown 0.3s ease;
}

.mobile-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  transition: background 0.2s;
}

.mobile-menu a:hover {
  background: var(--bg-elev);
  color: var(--accent);
  text-decoration: none;
}

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

/* ---------- Hero 区域 ---------- */
.hero {
  background: var(--gradient-hero);
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

.hero-content {
  flex: 1 1 400px;
  position: relative;
  z-index: 1;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

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

.hero-visual svg {
  width: 100%;
  max-width: 420px;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(37, 99, 235, 0.15));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* ---------- 按钮 ---------- */
.btn {
  background: var(--gradient-btn);
  color: var(--btn-text);
  padding: 0.8rem 2rem;
  border-radius: 40px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-block;
  text-align: center;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
  color: white;
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

/* ---------- 卡片 ---------- */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-btn);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

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

.card h3 {
  margin-bottom: 0.8rem;
  font-size: 1.1rem;
}

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

.card a {
  font-weight: 600;
  display: inline-block;
  margin-top: 1rem;
}

/* 标签 */
.tag {
  display: inline-block;
  background: var(--gradient-btn);
  color: white;
  padding: 0.3rem 1.2rem;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  margin-bottom: 1rem;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.2rem 0;
  transition: background 0.2s;
}

.faq-item:first-child {
  border-top: 1px solid var(--border-light);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  color: var(--heading-color);
  font-size: 1.05rem;
  padding: 0.5rem 0;
  transition: color 0.2s;
}

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

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--text-secondary);
  padding-left: 0.5rem;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding-top: 0.5rem;
}

/* ---------- 表格 ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.info-table th, .info-table td {
  border: 1px solid var(--border-light);
  padding: 0.8rem 1rem;
  text-align: left;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.info-table th {
  background: var(--bg-elev);
  font-weight: 600;
}

.info-table tr:hover {
  background: var(--bg-elev);
}

/* ---------- 引用 ---------- */
blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-style: italic;
  margin: 1.5rem 0;
}

/* ---------- 列表 ---------- */
ol, ul {
  color: var(--text-primary);
  margin-left: 1.2rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

/* ---------- 步骤容器 ---------- */
.steps-container {
  background: var(--bg-elev);
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

/* ---------- 页脚 ---------- */
footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-btn);
}

footer a {
  color: var(--footer-link);
  transition: opacity 0.2s;
}

footer a:hover {
  opacity: 0.8;
  color: var(--footer-link);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-col {
  flex: 1 1 200px;
}

.footer-col h4 {
  color: var(--footer-text);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-col p, .footer-col li {
  color: var(--footer-text);
  opacity: 0.9;
  font-size: 0.95rem;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 3rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--gradient-btn);
  color: white;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  cursor: pointer;
  z-index: 99;
  border: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

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

.to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

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

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

/* ---------- 响应式设计 ---------- */
@media (max-width: 768px) {
  .nav-links, .search-box { 
    display: none; 
  }
  
  .mobile-menu { 
    display: flex; 
  }
  
  .menu-btn { 
    display: block; 
  }
  
  .hero-grid { 
    flex-direction: column; 
    text-align: center;
  }
  
  .hero-content p {
    margin: 0 auto 1rem;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  h1 { 
    font-size: 1.8rem; 
  }
  
  .section {
    padding: 2.5rem 0;
  }
  
  .grid-cards {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .footer-grid {
    flex-direction: column;
    text-align: center;
  }
  
  .to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }
}

@media (min-width: 769px) {
  .menu-btn { 
    display: none; 
  }
}

/* 触摸设备优化 */
@media (hover: none) {
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* 打印样式 */
@media print {
  header, footer, .to-top, .hero-cta, .search-box {
    display: none;
  }
  
  body {
    font-size: 12pt;
  }
  
  .container {
    max-width: 100%;
  }
}

/* 无障碍 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 5px;
}

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

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

/* 暗色模式过渡 */
body, .card, header, .hero, footer, .search-box, .mobile-menu {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
```