.layoutMain {
  height: 100%;
  display: flex;
} 
.layoutContent {
  flex: 1 1;
  height: 100%;
  width: 100%;
  position: relative;
  box-sizing: border-box;
  // padding: 0 12px;
}
.sidebarArrow {
  background-color: #fff;
  border-radius: 0 12px 12px 0;
  position: relative;
  &::before {
    content: "";
    position: absolute;
    width: 10px;
    height: 10px;
    bottom: -10px;
    background: #000;
    background:radial-gradient(circle at 0 0, transparent 10px, #fff 10px);
    transform: rotate(180deg);
}
&::after {
  content: "";
    position: absolute;
    width: 10px;
    height: 10px;
    top: -10px;
    background: #000;
    background:radial-gradient(circle at 0 0, transparent 10px, #fff 10px);
    transform: rotate(90deg);
}
}
