body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
}
#background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}
header {
  width: 45.69rem;
  height: 3.75rem;
  margin: 6.56rem auto;
}
header .logo {
  display: flex;
  justify-content: space-between;
}
header img {
  width: 3.75rem;
  height:3.75rem;
}
.main {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  height:96.38rem ;
  width: 54rem;
  border-radius: 3.13rem;
  opacity: 1;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  text-align: center;
}
.main-img {
  display: block;
  margin: 5.75rem auto 0;
  width: 32.06rem;
  height: 32.06rem;
  box-sizing: border-box;
  border: .31rem solid #FFFFFF;
  border-radius: 3.13rem;
}

.title-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 3.69rem auto ;
}
.title-box .main-title {
  font-size: 3.75rem;
  font-weight: 600;
}
.title-box .sub-title {
  margin-top:1.69rem ;
  font-size: 2.5rem;
  font-weight: 600;
}


#audio-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 auto;
  width: 46.06rem;
  height: 15.63rem;
  text-align: center;
  color: white;
  font-size: 2em;
}
#audio-controls img {
  width: 15.63rem;
  height: 15.63rem;
}
#audio-controls button img {
  width:7.5rem;
  height: 7.5rem;
}
#play-pause, #next,#prev {
  cursor: pointer;
  margin: 2rem;
  border-radius: 4.96px;
  background-color: rgba(255, 255, 255, 0);
}
.time-box {
  display: flex;
  justify-content: space-between;
  width: 45.69rem;
  height: 3.5rem;
  font-size: 2.5rem;
  margin:  0 auto;
}

.modal {
  display: none; /* 默认隐藏 */
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.6);
}

.modal-content {
  background-color: rgba(0, 0, 0, .5);
  width: 100%;
  height: 100%;
  max-width: 400px;
}

.close {
  border-radius: 50%;
  width: 3.75rem;
  height: 3.75rem;
  position: absolute;
  right: 6.19rem;
  top: 4rem;
}
.modal-content-skin {
  position: absolute;
  color: #fff;
  left: 1.81rem;
  top: 3.13rem;
  font-size: 3.13rem;
  font-weight: 600;
}
.close img {
  width: 100%;
  height: 100%;
}

.close:hover,
.close:focus {
  cursor: pointer;
}

.background-options {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  padding: 9.38rem 3.13rem 0;
}

.background-option {
  box-sizing: border-box;
  display: block;
  height: 25.81rem;
  width: 18.75rem;
  border: .63rem solid #fff;
  margin-bottom: 1rem;
  border-radius: 3.13rem;
  position: relative;
}

.background-option.selected {
  border: .63rem solid #28D1B3;
}
.background-option.selected::after {
  content: '';
  color: white;
  background: url('../images/check.png') center center no-repeat;
  background-size: cover;
  border-radius: 3.13rem;
  width: 3.25rem;
  height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  bottom: .31rem;
  right: .31rem;
  font-size: .88rem;
  z-index: 1;
}

.background-options img {
  width: 100%;
  height: 100%;
  border-radius: 3.13rem
}

.genreModal-content {
  /* margin: 15% auto;
  padding: 20px;
  width: 80%;
  max-width: 600px; */
}
.genre-content {
  height: 100rem;
  width: 59.5rem; 
  margin: 11.88rem auto 0;
}
.content-title {
  color: #fff;
  font-size: 5rem;
  font-weight: 600;
  margin-bottom: 4.19rem;
}
.content-list {
  width: 59.5rem; 
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.content-list .list-item {
  width: 18.13rem;
  height: 31.81rem;
  /* background-color: pink; */
  color: #fff;
  font-weight: 600;
}
.content-list .list-item img{
  display: block;
  width: 18.13rem;
  height: 18.13rem;
  border-radius: 3.13rem;
  opacity: 1;
  box-sizing: border-box;
  border: .31rem solid #FFFFFF;
}
.content-list .list-item-img.selected {
  border: .31rem solid #28D1B3; 
}
.list-item .list-item-title {
  margin: 3.25rem auto 1.69rem;
  text-align: center;
  font-size: 2.5rem;
  font-weight: 600;
}
.list-item .list-item-subtitle {
  text-align: center;
  font-size: 1.88rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.timeoutModal-content {
  width: 56.13rem;
  height: 45.38rem;
  border-radius: 3.13rem;
  opacity: 1;
  background: #FFFFFF;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 3.13rem;
}
.timer-options {
  display: flex;
  width: 100%;
  height: 7.31rem;
  justify-content: space-between;
  margin: 6.25rem auto;
}
.time-option {
  width: 13.38rem;
  height: 7.31rem;
  line-height: 7.31rem;
  font-size: 2.81rem;
  font-weight: 600;
  text-align: center;
  background-color: #D8D8D8;
  border: none;
  cursor: pointer;
  border-radius: 3.13rem;
}
.time-option.selected {
  background-color: #D000FF;
   color: #fff;
}
.timeoutModal-title {
  display: flex;
  justify-content: center;
  align-items: center;

}
.timeoutModal-title span {
  flex: 1;
  text-align: center;
  font-size: 5rem;
  font-weight: 600;
}
.timeoutModal-title #close1 {
  width: 4.5rem;
  height: 4.5rem;
}
.btn {
  display: flex;
  justify-content: space-between;
  width: 100%;
}
.btn button{
  width: 21.75rem;
  height: 7.31rem;
  border-radius: 1.56rem;
  text-align: center;
  line-height: 7.31rem;
}
#startTimer{
  background-color:#D000FF;
  color: #fff;
}