.chanpinB {
    padding-bottom: 40px;
}
.chanpinB .lt {
    float: left;
    width: 50%;
    height: 350px;
}
.chanpinB .ri {
    float: right;
    width: 50%;
    height: 350px;
}
.chanpinB li:nth-child(1) .ri {
    background: url(../images/20190124173534_75140.jpg) center center no-repeat;
    background-size: cover;

}
.chanpinB li:nth-child(2)  .ri {
    background: url(../images/20180618235353_54489.jpg) center center no-repeat;
    background-size: cover;
    float: left;
}
.chanpinB li:nth-child(2)  .lt {
    float: right;
}
.chanpinB li:nth-child(3)  .ri {
    background: url(../images/20180618235353_54484.jpg) center center no-repeat;
    background-size: cover;

}
.chanpinB li:nth-child(4)  .ri {
    background: url(../images/20180618235353_54483.jpg) center center no-repeat;
    float: left;
    background-size: cover;
}
.chanpinB li:nth-child(4)  .lt {
    float: right;
}
.chanpinB .ri .bg{
    height: 100%;
    width: 100%;
    transition: 0.5s ease;
    background-color: #00000000;
}
.chanpinB .ri .box {
    display: none;
    height: 100%;
    width: 100%;
    color: #fff;
    transition: 0.5s ease;
    position: relative;
}
.chanpinB .ri .box .tu {
    width: 100px;
    height: 100px;
    background-color: #fff;
    left: 50%;
    top: 25%;
    transform: translate(-50%,-100px);
    position: absolute;
    transition: cubic-bezier(0.65, 0.05, 0.36, 1) 1.5s;
}
.chanpinB .ri .box .zi {
    position: absolute;
    left: 50%;
    top: 50%;
    font-size: 16px;
    transform: translate(-50%,100px);
    color: #fff;
    transition: cubic-bezier(0.65, 0.05, 0.36, 1) 1.5s;
}
.chanpinB .bg:hover{
    background-color: #00000080;
}

.chanpinB .bg:hover .box  {
    display: block;

}
.chanpinB .ri .box:hover .tu {
    transform: translate(-50%,-15px);

}
.chanpinB .ri .box:hover .zi {
    transform: translate(-50%,0px);

}

.chanpinB .lt h3 {
    margin: 60px 10% 20px;
    font-size: 30px;
    font-weight: 700;
    color: #4e5fa2;
}
.chanpinB .lt p {
    font-size: 16px;
    color: #333;
    margin: 5% 10%;
    line-height: 2
}
.chanpinC {
    padding-top: 40px;
}
.chanpinC ul {
    padding: 0 0 40px 0;
}

.chanpinC li {
    float: left;
    overflow: hidden;
    width: 33.33%;
    height: 365px;
    padding: 0 12px;
    margin-bottom: 15px;
}

.chanpinC li a {
    display: block;
    position: relative;
}
.chanpinC li .img {
    width: 100%;
    height: 300px;
    text-align: center;
}

.chanpinC li .img img {
    max-height: 280px;
    max-width: 80%;
}
.chanpinC li p {
    text-align: center;
    padding: 10px;
    height: 60px;
}
.chanpinC li .line {
    position: absolute;
    bottom: -5px;
    width: 100%;
    background-color: #4e5fa2;
    height: 0;
    transition: 0.4s ease;
}
.chanpinC li:hover .line {
    height: 5px;
}