/* 全局重置和基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f9faff;
}

img {
  /* max-width: 100%; */
  height: auto;
}

a {
  text-decoration: none;
  color: inherit;
}

/* 页面过渡动画 */
.page-enter-active,
.page-leave-active {
  transition: opacity 0.3s;
}
.page-enter-from,
.page-leave-to {
  opacity: 0;
}

/* 顶部介绍区块 */



  

/* 吸顶时导航栏背景和阴影 */
.header.fixed {
  background: linear-gradient(135deg, #7b5cff 0%, #4a90e2 100%);
  box-shadow: 0 2px 16px rgba(123,92,255,0.10);
  animation: slideDown 0.4s cubic-bezier(.77,0,.18,1);
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}