.brands-box{
    width: 100%;
    display: block;
    position: relative;
    margin-top: 100px;
    min-height: calc(100vh - 100px);
}
.page-banner-box{
    width: 100%;
    display: block;
    padding-top: 150px;
}
.page-banner-box span{
    display: block;
    width: 100%;
    height: 460px;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}
.brands-all-box{
    width: 1000px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
    font-size: 0;
    position: relative;
    box-sizing: border-box;
    padding: 20px 0;
}
.brands-logo-box{
    text-align: center;
}
.brands-text-en-box{
    font-size: 16px;
    color: #25262d;
    font-family: "Roboto";
    font-weight: 300;
    letter-spacing: 1px;
    line-height: 2;
    margin-top: 30px;
}
.brands-text-ch-box{
    font-size: 16px;
    color: #25262d;
    letter-spacing: 1px;
    line-height: 2;
    margin-top: 30px;
    margin-bottom: 40px;
}
#brands .index-product-info-box{
    box-sizing: border-box;
    padding: 50px 0;
    border-top: 1px solid #eee;
}


@media only screen and (max-width: 1000px){
    .brands-all-box{
        width: 750px;
    }
    .brands-box{
        margin-top: 80px;
        min-height: calc(100vh - 80px);
    }
    .page-banner-box{
        padding-top: 0;
    }
    .page-banner-box span{
        height: calc(100vw * 0.24);
    }
}
@media only screen and (max-width: 750px){
    .brands-all-box{
        width: 550px;
    }
}
@media only screen and (max-width: 550px){
    .brands-all-box{
        width: 400px;
        padding: 0;
    }
    .brands-box{
        margin-top: 54px;
        min-height: calc(100vh - 54px);
    }
    .brands-text-en-box{
        font-size: 14px;
        margin-top: 10px;
    }
    .brands-text-ch-box{
        font-size: 14px;
        margin-top: 10px;
        margin-bottom: 15px;
    }
    #brands .index-product-info-box{
        padding: 20px 0;
    }
}
@media only screen and (max-width: 400px){
    .brands-all-box{
        width: 300px;
    }
}





/*animation*/

@keyframes b_rotate_Y {
    0%{
        transform: rotateX(-90deg);
        opacity: 0;
    }
    to {
        opacity: 1;
        transform: rotateX(0deg);
    }
}
@media only screen and (min-width: 1001px){
    .page-banner-box,
    .brands-logo-box,
    .brands-text-en-box,
    .brands-text-ch-box{
        opacity: 0;
    }
    .page-banner-box.anima{
        animation: fade 1s ease 0s 1 both;
    }
    .brands-logo-box.anima{
        animation: fadeInDown 1s ease 0s 1 both;
    }
    .brands-text-en-box.anima{
        animation: b_rotate_Y 1s ease 0s 1 both;
    }
    .brands-text-ch-box.anima{
        animation: b_rotate_Y 1s ease 0s 1 both;
    }
}