.sec1 {
    margin: 147px auto 0;
    width: 1520px;
    padding-bottom: 240px;
}
.sec1 h1 {
    font-size: 42px;
    font-family: PingFang SC;
    font-weight: 500;
    color: #000000;
    text-align: center;
}
.sec1 .item {
    display: flex;
    align-items: center;
    height: 280px;
    padding-left: 10px;
}
.sec1 .item .img {
    width: 845px;
}
.sec1 .item .img img {
    transition: 0.6s;
}
.sec1 .item {
    border-bottom: 1px solid #E6E6E6;
}
.sec1 .item .content h2 {
    font-size: 26px;
    font-family: PingFang SC;
    font-weight: bold;
    color: #970005;
    margin-bottom: 25px;
    transition: 0.6s;
}
.sec1 .item .content p {
    font-size: 22px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #333333;
    transition: 0.6s;
}
.sec1 .item:after {
    content: "";
    width: 0%;
    height: 1px;
    background: #970005;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: 1;
    transition: 1s;
}
.sec1 .item:hover:after {
    width: 100%;
}
@media screen and (max-width: 1600px) {
    .sec1 h1 {
        font-size: 36px;
    }
    .sec1 {
        width: 90%;
        margin: 80px auto 0;
    }
    .sec1 .item .content p {
        font-size: 20px;
    }
    .sec1 .item .img {
        width: 55%;
    }
}
@media screen and (max-width: 1400px) {
    .sec1 h1 {
        font-size: 32px;
    }
    .sec1 .item .content p {
        font-size: 18px;
    }
    .sec1 .item .content h2 {
        font-size: 24px;
    }
    .sec1 .item{
        height: 220px;
    }
}
@media screen and (max-width: 1365px) {
    .sec1 .item .content {
        width: 45%;
    }
}
@media screen and (max-width: 1023px) {
    .sec1 h1 {
        font-size: 28px;
    }
    .sec1 {
        margin: 40px auto 0;
    }

}
@media screen and (max-width: 768px) {
    .sec1 .item .content {
        width: 70%;
    }
    .sec1 .item .content h2{
        font-size: 22px;
        margin-bottom: 10px;
    }
    .sec1 .item{
        height: 180px;
    }
    .sec1{
        padding-bottom: 60px;
    }
    .sec1 .item .content p {
        font-size: 16px;
    }
    .sec1 .item .img {
        width: 30%;
    }
}