.slideout-panel {
  position: relative;
  z-index: 1;
  /*will-change: transform;*/
  background-color: #fff; /* A background-color is required */
  min-height: 100vh;
}

.slideout-open,
.slideout-open .slideout-panel {
  overflow: hidden;
}

#fix_header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  padding: 5px 0 4px 0;
  z-index: 10000;
  width: 100%;
  background: #fff;
  transition: all 0.31s;
}
#fix_header.shadow {
  box-shadow: 0 0 20px #000;
}