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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  color: white;
}

/* 背景图 */
#background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  filter: blur(8px);
  transform: scale(1.1);
  z-index: -1;
  transition: opacity 0.8s;
}

/* 加载动画 */
.loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.2em;
  opacity: 0.7;
  z-index: 100;
}

/* 内容卡片 */
.card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 60px 80px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  animation: fadeIn 0.8s ease-out;
}

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

h1 {
  font-size: 3em;
  margin-bottom: 15px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 1.2em;
  opacity: 0.9;
  margin-bottom: 40px;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
}

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.service-btn {
  padding: 18px 30px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.service-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 图标 */
.icon {
  font-size: 1.5em;
}

/* 响应式 */
@media (max-width: 768px) {
  .card {
    padding: 40px 30px;
  }
  
  h1 {
    font-size: 2.5em;
  }
  
  .services {
    grid-template-columns: 1fr;
  }
}

/* 错误提示 */
.error-msg {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: #ff6b6b;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 200;
  display: none;
}