* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, 'Microsoft YaHei', sans-serif; background: #0A0E27; color: #fff; overflow-x: hidden; }

/* 导航 */
.navbar { display: flex; justify-content: space-between; align-items: center; padding: 20px 60px; position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(10,14,39,0.8); backdrop-filter: blur(10px); }
.logo { font-size: 22px; font-weight: bold; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: #B0B8D0; text-decoration: none; transition: color .3s; }
.nav-links a:hover { color: #00D4FF; }
.btn-login { color: #fff !important; }
.btn-register { background: linear-gradient(135deg, #00D4FF, #6366F1); padding: 8px 20px; border-radius: 20px; color: #fff !important; }

/* 首屏 */
.hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; text-align: center; padding-top: 80px; }
.particles { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 20% 50%, rgba(0,212,255,0.15), transparent 50%), radial-gradient(circle at 80% 80%, rgba(99,102,241,0.15), transparent 50%); animation: pulse 4s infinite; }
@keyframes pulse { 0%,100% { opacity: .6; } 50% { opacity: 1; } }
.hero-content { position: relative; z-index: 2; }
.hero h1 { font-size: 56px; margin-bottom: 20px; }
.gradient-text { background: linear-gradient(135deg, #00D4FF, #8B5CF6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.subtitle { font-size: 20px; color: #B0B8D0; margin-bottom: 40px; }
.hero-btns { display: flex; gap: 20px; justify-content: center; margin-bottom: 60px; }
.btn-primary { background: linear-gradient(135deg, #00D4FF, #6366F1); color: #fff; padding: 14px 32px; border-radius: 30px; text-decoration: none; font-weight: bold; border: none; cursor: pointer; transition: transform .3s; display: inline-block; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,212,255,0.3); }
.btn-outline { border: 2px solid #00D4FF; color: #00D4FF; padding: 12px 30px; border-radius: 30px; text-decoration: none; transition: all .3s; display: inline-block; }
.btn-outline:hover { background: #00D4FF; color: #0A0E27; }
.btn-block { display: block; text-align: center; }
.hero-stats { display: flex; gap: 60px; justify-content: center; }
.hero-stats > div { text-align: center; }
.hero-stats .num { display: block; font-size: 36px; font-weight: bold; background: linear-gradient(135deg, #00D4FF, #8B5CF6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stats .label { color: #B0B8D0; font-size: 14px; }

/* 通用区块 */
.section { padding: 80px 60px; }
.section-dark { background: rgba(255,255,255,0.02); }
.section-title { font-size: 40px; text-align: center; margin-bottom: 16px; }
.section-sub { text-align: center; color: #B0B8D0; margin-bottom: 50px; }

/* AI员工卡片 */
.ai-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; }
.ai-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(0,212,255,0.2); border-radius: 16px; padding: 30px 20px; text-align: center; cursor: pointer; transition: all .3s; }
.ai-card:hover { transform: translateY(-8px); border-color: #00D4FF; box-shadow: 0 10px 40px rgba(0,212,255,0.2); }
.ai-avatar { font-size: 48px; margin-bottom: 12px; }
.ai-name { font-size: 18px; font-weight: bold; margin-bottom: 6px; }
.ai-title { font-size: 13px; color: #00D4FF; margin-bottom: 10px; }
.ai-desc { font-size: 12px; color: #B0B8D0; }

/* 功能卡片 */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 1200px; margin: 0 auto; }
.feature-card { background: rgba(255,255,255,0.05); border-radius: 16px; padding: 30px; text-align: center; transition: transform .3s; }
.feature-card:hover { transform: translateY(-5px); }
.feature-icon { font-size: 40px; margin-bottom: 16px; }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { color: #B0B8D0; font-size: 14px; }

/* 价格卡片 */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; }
.price-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: 30px; position: relative; }
.price-card.featured { border-color: #00D4FF; box-shadow: 0 0 30px rgba(0,212,255,0.2); }
.badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: linear-gradient(135deg, #00D4FF, #6366F1); padding: 4px 16px; border-radius: 12px; font-size: 12px; }
.price-name { font-size: 18px; color: #B0B8D0; margin-bottom: 10px; }
.price-amount { font-size: 36px; font-weight: bold; margin-bottom: 20px; }
.price-amount span { font-size: 14px; color: #B0B8D0; font-weight: normal; }
.price-features { list-style: none; margin-bottom: 24px; }
.price-features li { padding: 8px 0; color: #B0B8D0; font-size: 14px; }

/* 底部 */
.footer { text-align: center; padding: 40px; color: #666; border-top: 1px solid rgba(255,255,255,0.1); }

/* 响应式 - 平板 */
@media (max-width: 1024px) {
  .ai-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 响应式 - 手机 */
@media (max-width: 768px) {
  .navbar { padding: 12px 16px; flex-wrap: wrap; }
  .logo { font-size: 18px; }
  .nav-links { gap: 10px; flex-wrap: wrap; }
  .nav-links a { font-size: 13px; }
  .btn-register { padding: 6px 14px; font-size: 13px; }
  .hero { min-height: auto; padding: 100px 20px 60px; }
  .hero h1 { font-size: 28px; }
  .subtitle { font-size: 16px; }
  .hero-btns { flex-direction: column; gap: 12px; align-items: center; }
  .hero-btns a { width: 80%; text-align: center; }
  .hero-stats { gap: 30px; flex-wrap: wrap; }
  .hero-stats .num { font-size: 28px; }
  .section { padding: 40px 20px; }
  .section-title { font-size: 26px; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .ai-card { padding: 20px 12px; }
  .ai-avatar { font-size: 36px; }
  .ai-name { font-size: 15px; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card { padding: 24px; }
}