* {
  margin: 0;
  padding: 0;
  border: 0;
}
a {
  text-decoration: none;
}
.full-box {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.box {
  position: relative;
  margin: 0 auto;
  width: 16rem;
  height: 25.2rem;
  background-color: #0c9;
  overflow: hidden;
  text-align: center;
  color: #fff;
}

#player .music-nav {
  position: absolute;
  bottom: 0;
  width: 16rem;
  height: 3.25rem;
  background-color: rgba(255, 255, 255, 0.5);
}
#player .music-nav input {
  width: 16rem;
  height: 0.25rem;
  background-color: #fff;
  -webkit-appearance: none;
}
#player .music-nav input::-webkit-slider-thumb {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 0.25rem;
  background-image: url(../img/thub2.png);
  background-size: 100%;
  -webkit-appearance: none;
}
#player .music-nav .operate {
  float: left;
  margin-top: 0.5rem;
  margin-left: 4.5rem;
}
#player .music-nav #before {
  width: 0;
  height: 0;
  border-top: 0.625rem solid transparent;
  border-right: 1.25rem solid #fff;
  border-bottom: 0.625rem solid transparent;
  border-radius: 0.75rem;
}
#player .music-nav #next {
  width: 0;
  height: 0;
  border-top: 0.625rem solid transparent;
  border-left: 1.25rem solid #fff;
  border-bottom: 0.625rem solid transparent;
  border-radius: 0.75rem;
}
#player .cover {
  margin: 0.5rem;
  width: 15rem;
  height: 15rem;
  background-image: url(../img/cover4.jpeg);
  background-size: 100%;
  border-radius: 7.5rem;
}
#player .cover-play {
  -webkit-animation: turn 6s infinite linear;
  animation: turn 6s infinite linear;
}
@keyframes turn {
  0% {
    transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
@-webkit-keyframes turn {
  0% {
    transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
#player audio {
  margin: 2.5rem;
}