.tool-entrance {
  position: absolute;
  z-index: 99;
  top: 0;
  left: -30px;
  bottom: 0;
  margin: auto;
  display: inline-block;
  width: 30px;
  height: 85px;
  padding: 5px;
  background: #333;
  text-align: center;
  color: #fff;
  cursor: pointer;
  user-select: none;
}

.tool-main {
  position: absolute;
  z-index: 90;
  top: 0;
  width: 100%;
  height: 100%;
  background: #ccc;
}
.tool-input-group > input {
  width: 40%;
}
.tool-input-group > button {
  width: 50%;
}


.tool-btn {
  box-sizing: border-box;
  margin: 5px;
}