cb_admin/css/index.css

.outer-box {
  position: relative;
  height: 100%;
  width: 100%;
}
.outer-box header {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 7;
  width: 100%;
  padding: 0 20px;
  background: #242A33;
  color: #999;
  height: 50px;
  line-height: 40px;
}