.master {
  width: 100%;
  height: 100%;
}
.master > div:not(.el-backtop) {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  width: 100%;
  height: calc(100% - 3.16em);
  padding: 0.1rem 0.2rem;
  overflow: auto;
}
.master .element-target {
  font-size: 0.16rem;
  color: var(--color-primary);
}