/* 基本样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

/* 头部样式 */
header {
  background: linear-gradient(135deg, #4285f4, #34a853);
  color: white;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* 主要内容区域 */
main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* 英雄区域 */
.hero {
  background: white;
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
}

.hero h2 {
  color: #4285f4;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: #666;
}

#notification-btn {
  background: #4285f4;
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

#notification-btn:hover {
  background: #3367d6;
}

/* 特性卡片 */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: white;
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card h3 {
  color: #4285f4;
  margin-bottom: 0.5rem;
}

/* 底部 */
footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 1.5rem;
  margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  header h1 {
    font-size: 1.5rem;
  }
  
  .hero {
    padding: 1.5rem;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
  
  main {
    margin: 1rem auto;
  }
}

/* 安装提示样式 */
.install-prompt {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #4285f4;
  color: white;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  display: none;
  z-index: 1000;
}

.install-prompt button {
  background: white;
  color: #4285f4;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 0.5rem;
  font-weight: bold;
}

.install-prompt .close-btn {
  background: none;
  color: white;
  float: right;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  margin-top: -0.5rem;
  margin-right: -0.5rem;
}