.about{
    min-height: 100vh;
    background: #F6F7FB;
}
.top img{
    width: 100%;
}
.about-text-box{
    padding: 66px 0;
    display: flex;
    justify-content: center;
}
.about-text{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.about-text h3{
    font-size: 40px;
    color: #221E1F;
    margin-bottom: 20px;
}
.about-text h4{
    color: #666666;
    font-size: 18px;
    margin-bottom: 64px;
}
.about-text .text{
    display: flex;
}
.about-text .text .left-img{
    flex: 0 0 450px;
    margin-right: 64px;
}
.about-text .text .text-p .p{
    color: #333333;
    line-height: 32px;
    margin-bottom: 30px;
}
.about-text .text .text-p .p-tips{
    display: flex;
    align-items: center;
    margin-bottom: 18px;
}
.about-text .text .text-p .p-tips img{
    width: 30px;
    height: 30px;
    margin-right: 8px;
    color: #333333;
}
.advantage-box{
    background: url("../img/advantage-bg.png") no-repeat;
    background-size: 100% 100%;
    height: 718px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.advantage{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.advantage h4{
    font-size: 24px;
    color: #FFFFFF;
    margin-bottom: 72px;
}
.advantage .list{
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.advantage .list .item{
    width: 31%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #FFFFFF;
    box-shadow: inset 0px 1px 3px 0px rgba(255,255,255,0.5), 0px 2px 12px 0px rgba(0,0,0,0.0809);
    border-radius: 6px 6px 6px 6px;
}
.advantage .item img{
   width: 450px;
    height: 276px;
    margin-bottom: 18px;
}
.advantage .item  .title{
    font-size: 20px;
    color: #333333;
    margin-bottom: 16px;
}
.advantage .item  .tips{
    color: #666666;
    margin-bottom: 30px;
}
.contact-us-box{
    background: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
}
.contact-us{
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.contact-us h3{
    font-size: 40px;
    color: #221E1F;
    font-weight: 500;
    margin-bottom: 140px;
}
.contact-us .info{
    display: flex;
}
.contact-us .info .info-left{
    flex: 0 0 420px;
    margin-right: 55px;
}
.contact-us .info .info-left h4{
    font-size: 24px;
    color: #333333;
    margin-bottom: 36px;
}
.contact-us .info .info-left .line{
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    color: #333333;
}
.contact-us .info .info-left .line img{
    margin-right: 8px;
}
.contact-us .info .info-left form{
    margin-top: 50px;
}
.contact-us .info .info-left form p{
    margin-bottom: 16px;
}
.contact-us .info .info-left form p input,select{
    width: 420px;
    height: 42px;
    border-radius: 2px 2px 2px 2px;
    border: 1px solid #E0E0E0;
    background: #FFFFFF;
    padding: 0 12px;
    box-sizing: border-box;
}
.contact-us .info .info-left form p textarea{
    width: 420px;
    height: 138px;
    resize: none;
    border-radius: 2px 2px 2px 2px;
    border: 1px solid #E0E0E0;
    padding: 12px;
    box-sizing: border-box;
}
.contact-us .info .info-left form p button{
    width: 420px;
    height: 42px;
    background: #2A7EFB;
    border-radius: 2px 2px 2px 2px;
    border: none;
    color: #fff;
}
.contact-us .info .info-right{
    flex: 1;
}
.contact-us .info .info-right img{
    width: 100%;
    height: 600px;
}
.intellectual-property-box{
    padding: 90px 0;
    display: flex;
    justify-content: center;
}
.intellectual-property{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.intellectual-property h3{
    font-size: 40px;
    color: #221E1F;
    margin-bottom: 64px;
}
.intellectual-property .list{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.intellectual-property .list .item{
    box-sizing: border-box;
    width: 24%;
    padding: 10px;
    background: #fff;
    box-shadow: 0px 2px 12px 0px rgba(0,0,0,0.0819);
    border-radius: 4px 4px 4px 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;

    img{
        width: 100%;
    }
}