.index-product-box{
    width: 100%;
    display: block;
    position: relative;
}
.index-product-all-box{
    width: 1000px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
    font-size: 0;
    position: relative;
    box-sizing: border-box;
    padding: 40px 0;
}
.index-product-title-box{
    text-align: center;
    margin-bottom: 70px;
}
.index-product-title-en{
    font-size: 26px;
    font-family: "Oswald";
    font-weight: 700;
    letter-spacing: 2px;
}
.index-product-title-ch{
    display: inline-block;
    width: 210px;
    font-size: 24px;
    color: #25262d;
    font-weight: bold;
    letter-spacing: 2px;
    margin-top: 15px;
    position: relative;
}
.index-product-title-ch:after{
    content: '';
    width: 1px;
    height: 11px;
    display: block;
    background-color: #25262d;
    position: absolute;
    bottom: calc(50% - 6px);
    left: 0;
}
.index-product-title-ch:before{
    content: '';
    width: 1px;
    height: 11px;
    display: block;
    background-color: #25262d;
    position: absolute;
    bottom: calc(50% - 6px);
    right: 0;
}
.index-product-info{
    width: 320px;
    display: inline-block;
    vertical-align: top;
    margin-left: 20px;
    margin-bottom: 20px;
}
.index-product-info:nth-child(3n + 1){
    margin-left: 0;
}
.index-product-info-img-box{
    width: 100%;
    overflow: hidden;
}
.index-product-info-img{
    width: 100%;
    height: 320px;
    position: relative;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    display:         flex;
    display: -webkit-flex;
    align-items: center;
    -webkit-align-items: center;
    justify-content: center;
    -webkit-justify-content: center;
    flex-direction:column;
}
.index-product-info-mask-box{
    width: 280px;
    height: 200px;
    position: absolute;
    box-sizing: border-box;
    padding: 10px;
    background-color: rgba(37, 38, 45, 0.6);
    display:         flex;
    display: -webkit-flex;
    align-items: center;
    -webkit-align-items: center;
    justify-content: center;
    -webkit-justify-content: center;
    flex-direction:column;
    opacity: 0;
    transition: all .3s linear;
}
.index-product-info-mask-en{
    font-size: 16px;
    font-family: "Oswald";
    letter-spacing: 1px;
    color: #fff;
}
.index-product-info-mask-ch{
    font-size: 14px;
    color: #25262d;
    letter-spacing: 1px;
    color: #fff;
    margin-top: 5px;
}
.index-product-info-border-w{
    background-color: #eee;
    width: 0;
    height: 1px;
    display: block;
    transition: all .3s linear;
}
.index-product-info-border-h{
    background-color: #eee;
    width: 1px;
    height: 0;
    display: block;
    transition: all .3s linear;
}
.index-product-info-border-tl .index-product-info-border-w,
.index-product-info-border-tl .index-product-info-border-h{
    position: absolute;
    top: 10px;
    left: 10px;
}
.index-product-info-border-tr .index-product-info-border-w,
.index-product-info-border-tr .index-product-info-border-h{
    position: absolute;
    top: 10px;
    right: 10px;
}
.index-product-info-border-bl .index-product-info-border-w,
.index-product-info-border-bl .index-product-info-border-h{
    position: absolute;
    bottom: 10px;
    left: 10px;
}
.index-product-info-border-br .index-product-info-border-w,
.index-product-info-border-br .index-product-info-border-h{
    position: absolute;
    bottom: 10px;
    right: 10px;
}



/*hover*/
.index-product-info:hover .index-product-info-mask-box{
    opacity: 1;
}
.index-product-info:hover .index-product-info-border-w{
    width: 10px;
}
.index-product-info:hover .index-product-info-border-h{
    height: 10px;
}

@media only screen and (max-width: 1000px){
    .index-product-all-box{
        width: 750px;
    }
    .index-product-info{
        width: 240px;
        margin-left: 15px;
        margin-bottom: 15px;
    }
    .index-product-info-img{
        height: 240px;
    }
    .index-product-info-mask-box{
        width: 200px;
        height: 143px;
    }
    .index-product-info-mask-en{
        font-size: 14px;
    }
    .index-product-info-mask-ch{
        font-size: 12px;
    }
}
@media only screen and (max-width: 750px){
    .index-product-all-box{
        width: 550px;
    }
    .index-product-info{
        width: 270px;
        margin-bottom: 10px;
    }
    .index-product-info:nth-child(n){
        margin-left: 10px;
    }
    .index-product-info:nth-child(2n + 1){
        margin-left: 0;
    }
    .index-product-info-img{
        height: 270px;
    }
    .index-product-info-mask-box{
        width: 230px;
        height: 164px;
    }
    .index-product-title-box{
        margin-bottom: 50px;
    }
    .index-product-title-en{
        font-size: 22px;
    }
    .index-product-title-ch{
        font-size: 20px;
        width: 160px;
        margin-top: 10px;
    }
    .index-product-info-mask-box{
        opacity: 1;
    }
}
@media only screen and (max-width: 550px){
    .index-product-all-box{
        width: 400px;
        padding: 20px 0;
    }
    .index-product-info{
        width: 195px;
    }
    .index-product-info-img{
        height: 195px;
    }
    .index-product-info-mask-box{
        width: 155px;
        height: 110px;
    }
    .index-product-title-box{
        margin-bottom: 30px;
    }
    .index-product-title-en{
        font-size: 18px;
    }
    .index-product-title-ch{
        font-size: 16px;
        width: 130px;
        margin-top: 0;
    }
    .index-product-title-ch:before,
    .index-product-title-ch:after{
        display: none;
    }
}
@media only screen and (max-width: 400px){
    .index-product-all-box{
        width: 300px;
        padding: 10px 0;
    }
    .index-product-info{
        width: 100%;
    }
    .index-product-info:nth-child(n){
        margin-left: 0;
    }
    .index-product-info-img{
        height: 300px;
    }
    .index-product-info-mask-box{
        width: 260px;
        height: 186px;
    }
    .index-product-title-box{
        margin-bottom: 10px;
    }
    .index-product-title-en{
        font-size: 16px;
    }
    .index-product-title-ch{
        font-size: 14px;
        width: 110px;
    }
}



/*animation*/

@keyframes title_b_fadeInLeft {
    0%{
        transform: translateX(10px);
        opacity: 0;
    }
    to {
        transform: translateX(0px);
        opacity: 1;
    }
}
@keyframes title_b_fadeInRight {
    0%{
        transform: translateX(-10px);
        opacity: 0;
    }
    to {
        transform: translateX(0px);
        opacity: 1;
    }
}
@media only screen and (min-width: 1001px){
    .index-product-title-en,
    .index-product-title-ch,
    .index-product-title-ch:before,
    .index-product-title-ch:after,
    .index-product-info{
        opacity: 0;
    }
    .index-product-title-en.anima{
        animation: fadeInDown 1s ease 0s 1 both;
    }
    .index-product-title-ch.anima{
        animation: fade 1s ease .4s 1 both;
    }
    .index-product-title-ch.anima:before{
        animation: title_b_fadeInLeft 1s ease .5s 1 both;
    }
    .index-product-title-ch.anima:after{
        animation: title_b_fadeInRight 1s ease .5s 1 both;
    }
    .index-product-info.anima{
        animation: fadeInUp 1s ease 0s 1 both;
    }
}