* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  font-size: 12px;
  height: 100%;
}

.app {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.beian {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
}

img {
  width: 100%;
  height: 100%;
}

.msk {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  z-index: 100;
  background-color: rgba(0, 0, 0, 0.6);
}

.msk .tip {
  right: 2rem;
  position: absolute;
  margin-top: 1rem;
  width: 12rem;
  height: 12rem;
  background-color: rgba(255, 255, 255, 0.6);
  border-radius: 0.5rem;
  text-align: center;
}

.msk .tip:before {
  position: absolute;
  content: "";
  width: 0;
  height: 0;
  left: 10rem;
  top: -10px;
  border-bottom: 10px solid rgba(255, 255, 255, 0.6);
  border-right: 10px solid transparent;
  border-left: 10px solid transparent;
}

.msk .tip .tip_icon {
  background-color: rgba(0, 0, 0, 0.6);
  width: 3rem;
  height: 3rem;
  margin: 3rem auto 0.5rem;
  border-radius: 3rem;
}

.msk .tip .tip_icon img {
  width: 2rem;
  height: 2rem;
  margin-top: 0.5rem;
  vertical-align: middle;
}