.nav {
    margin-top: 95px;
    width: 100%;
    position: relative;
    background: rgb(29, 29, 31);
}

.nav-container {
    position: relative;
    width: 1920px;
    height: 449px;
    margin: 0 auto;
}

.nav-container img {
    width: 100%;
    height: 100%;
}

.nav-container .text-area .title {
    position: absolute;
    left: 179px;
    top: 343px;
    font-size: 48px;
    font-family: 'MicrosoftYaHei';
    font-weight: bold;
    color: #FBFBFD;
    line-height: 48px;
}

#swiper-container {
    width: 1674px;
    height: 781px;
    margin: 0 auto;
    margin-bottom: 43px;
}

#swiper-container .swiper-slide {
    width: 100%;
    background-position: center;
    background-size: cover;
    position: relative;
}

#swiper-container .swiper-button-next {
    width: 41px;
    height: 41px;
    border-radius: 50%;
    font-size: 10px;
    background: rgba(0, 0, 0, 0);
    color: white;
    line-height: 41px;
    text-align: center;
    margin-right: 20px;
}

#swiper-container .swiper-button-prev {
    width: 41px;
    height: 41px;
    border-radius: 50%;
    font-size: 10px;
    background: rgba(0, 0, 0, 0);
    color: white;
    line-height: 41px;
    text-align: center;
    margin-left: 20px;
}

.product-part .title {
    width: 100%;
    text-align: center;
    font-size: 48px;
    font-family: MicrosoftYaHei;
    font-weight: 400;
    color: #FBFBFD;
    margin-top: 74px;
    margin-bottom: 28px;
}

.product-part .con {
    position: relative;
    width: 1674px;
    background: #000;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    align-content: center;
}

.product-part .con .fangan {
    width: 1548px;
    font-size: 22px;
    font-family: 'MicrosoftYaHei';
    font-weight: 400;
    color: #FBFBFD;
    line-height: 48px;
}

.product-part .con .part {
    width: 350px;
    height: 178px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 190px;
    margin-right: 130px;
}

.product-part .con .part p {
    font-size: 36px;
    font-family: 'Source Han Sans SC';
    font-weight: 500;
    color: #FBFBFD;
    line-height: 49px;
    margin-left: 20px;
}

.swiper-erweima {
    text-align: center;
    margin-bottom: 40px;
}

.swiper-erweima p {
    font-size: 27px;
    font-family: 'MicrosoftYaHei';
    font-weight: 400;
    color: #FFFFFF;
    line-height: 35px; 
    margin-top: 34px;
}