.toolbar {
  position: absolute;
  background: #008dc2;
  width: 1.32rem;
  height: 100%;
  z-index: 10;
}

.toolbar .buttons {
  position: absolute;
  bottom: .18rem;
}

.toolbar button {
  display: none;
  margin: .22rem .2rem;
  width: .94rem;
  height: .94rem;
  border-radius: .06rem;
  background: center / cover no-repeat transparent;
}
.toolbar button::after { /* for preloading */
  content: '';
  z-index: -1;
  visibility: hidden;
}

.toolbar .index {
  position: absolute;
  display: block;
  top: .2rem;
}
.toolbar .title {
  position: absolute;
  width: .93rem;
  height: 5rem;
  left: .2rem;
  top: 1.64rem;
  background: center 0 / contain no-repeat;
}

.tab {
  position: absolute;
  left: 1.32rem;
  right: 0;
  height: 100%;
  margin: 0 auto;
  border: 0 solid #fff;
  border-width: 0 0 0 .08rem;
  overflow: hidden;
  z-index: 12;
}

.error {
  position: absolute;
  width: 8rem;
  height: 1rem;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  line-height: 1rem;
  font-size: .35rem;
}

.page {
  box-sizing: border-box;
  background-color: #fff;
}

.page-index,
.page-nav,
.static,
.button,
.mask,
.popup,
.select {
  position: absolute;
  box-sizing: border-box;
}

.mask.opened { opacity: 0; }