/* AppBar 组件样式 */
.MuiAppBar-root {
  display: flex;
  flex-direction: column;
  width: 100%;
  z-index: 1100;
}

/* 定位 */
.MuiAppBar-positionFixed {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

.MuiAppBar-positionAbsolute {
  position: absolute;
}

.MuiAppBar-positionSticky {
  position: sticky;
  top: 0;
}

.MuiAppBar-positionStatic {
  position: static;
}

.MuiAppBar-positionRelative {
  position: relative;
}

/* 颜色 */
.MuiAppBar-colorDefault {
  background-color: #1e293b;
  color: #f8fafc;
}

.MuiAppBar-colorPrimary {
  background-color: #667eea;
  color: #ffffff;
}

.MuiAppBar-colorSecondary {
  background-color: #764ba2;
  color: #ffffff;
}

.MuiAppBar-colorTransparent {
  background-color: transparent;
}