:root{
  --begainIconBg: linear-gradient(90deg, #4097F4 0%, rgba(255,255,255,0) 100%);
  --begainBtnBg:#4097F4;
  --itemBg:rgba(64, 151, 244, 0.50);
  --itemTopColor:#5AB221;
  --answerBg:#4097F4;
}



body,html{
  padding: 0;
  margin: 0;
  background: #f5f5f5;
}

.img-item{
  position: relative;
}
.img-item img{
  width: 100%;
  margin-top: 12px;
}

.top{
  display: block;
  width: 93.6%;
  margin: 12px auto 0;
}

.top-text{
  font-size: 20px;
  font-family: Source Han Sans CN;
  font-weight: bold;
  line-height: 30px;
  color: #E78110;
  text-align: center;
  margin-top: 20px;
  margin-bottom: 15px;
}

.begain-text{
  width: 93.6%;
  margin: 12px auto 50px;
  background: #fff;
  border-radius: 8px;
  padding: 16px 12px;
}


.begain-icon{
  width: 60px;
  height: 12px;
  background: var(--begainIconBg);
  border-radius: 4px;
  margin-bottom: 8px;
}

.begain-p{
  font-size: 18px;
  font-family: Source Han Sans CN;
  font-weight: 400;
  line-height: 32px;
  color: #555555;
}

.p2{
  margin-top: 14px;
}

.begain-btn{
  width: 275px;
  height: 50px;
  background: var(--begainBtnBg);
  border-radius: 8px;
  margin: 0 auto;
  font-size: 22px;
  font-family: Source Han Sans CN;
  font-weight: bold;
  line-height: 50px;
  color: #FFFFFF;
  text-align: center;
  cursor: pointer;
}

.item{
  width: 93.6%;
  margin: 0 auto;
  background: var(--itemBg);
  border-radius: 8px;
  padding: 16px 12px;
  display: none;
}

.item-in{
  background: #FFFFFF;
  border-radius: 8px;
  padding: 20px 16px 8px;
}

.item-title{
  font-size: 38px;
  font-family: Source Han Sans CN;
  font-weight: bold;
  line-height: 38px;
  color: var(--itemTopColor);
  text-align: center;
  position: relative;
}

.item-title::before{
  content: '';
  width: 30%;
  height: 2px;
  background: var(--itemTopColor);
  position: absolute;
  top: 50%;
  left: 0;
}

.item-title::after{
  content: '';
  width: 30%;
  height: 2px;
  background: var(--itemTopColor);
  position: absolute;
  top: 50%;
  right: 0;
}

.text{
  font-size: 20px;
  font-family: Source Han Sans CN;
  font-weight: bold;
  line-height: 32px;
  color: #333333;
  margin-top: 18px;
  margin-bottom: 30px;
}

.answer{
  padding: 7px 20px;
  background: var(--answerBg);
  font-size: 16px;
  font-family: Source Han Sans CN;
  font-weight: 400;
  line-height: 32px;
  color: #FFFFFF;
  border-radius: 4px;
  margin-bottom: 12px;
  cursor: pointer;
}

.textbox{
  display: none;
}


@media (min-width:500px) {
  .img-item{
    width: 500px;
    margin: 0 auto;
  }
  .top{
    width: 500px;
  }

  .begain-text{
    width: 500px;
  }

  .item{
    width: 500px;
  }
}