.main-box-outer {
    padding-bottom: 65px;
}
.top-bar-outer {
    background-color: rgb(35,37,38);
    height: 150px;
    width: 100%;
    min-width: 1200px;
}
.top-bar-inner {
    margin: 0 auto;
    height: 100%;
    width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.top-bar-inner h1 {
    font-size: 34px;
    color:white;
    line-height: 50px;
    font-weight: 500;
    text-align: center;
    width: 100%;
}


body {
    overflow-x: scroll;
}
.main-box {
    width: 100%;
    padding: 30px 2% 20px;
    margin-top: 0;
}
.main-box * {
    padding: 0;
    margin: 0;
    font-size: 14px;
    box-sizing: border-box;
}

.main-box ul li {
    list-style: none;
    font-weight: bold;
}
.main-content-box {
    width: 1400px;
    min-width: 1400px;
    padding: 0 15px;
    margin: 0 auto;
}

.nav-box {
    width: 100%;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    line-height: 50px;
}
.nav-item {
    margin-right: 20px;
    padding: 5px 5px 0;
    list-style: none;
    cursor: pointer;
    border-bottom: 2px solid white;
    transition: border-bottom-color, 200ms;
}
.nav-item:last-child {
    margin-right: 0;
}
.active-item {
    border-bottom: 2px solid rgb(37,37,37);
}

.type-box {
    width: 100%;
    margin-top: 50px;
}
.product-box {
    width: 100%;
    display: none;
}
.active-product-box {
    display: block;
}
.product-list {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}
.product-list .product-item {
    width: 24%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}
.product-list .product-item:first-child {
    /* border: 0; */
    cursor: default;
}
.product-list .product-item:not(:last-child) {
    border-right: 0;
}
.product-img-box {
    width: 100%;
    height: 322px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: pointer;
    margin-bottom: 2px;
}
.param-type-select {
    width: 75%;
    height: 42px;
    line-height: 42px;
    border: 0;
    font-size: 18px;
    margin-right: 20%;
}
.product-title {
    height: 22px;
    line-height: 22px;
    font-size: 16px;
    font-weight: bold;
    margin-top: 10px;
}
.product-price {
    font-size: 14px;
    font-weight: normal;
}
.product-img-box img{
    height: 70%;
}
.product-img-box img.logo {
    width: 50%;
    height: auto;
}
.buy-now-btn {
    display: inline-block;
    height: 32px;
    width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: white;
    background-color: rgb(0,112,213);
    border-radius: 25px;
    font-weight: normal;
    margin-bottom: 25px;
}

.buy-now-btn:hover {
    background-color: rgb(36,144,227);
}

.param-item, 
.buy-now-box,
.param-select-box {
    min-height: 65px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    text-align: center;
    line-height: 1.3;
    font-weight: 400;
}
.param-item:nth-child(2n-1),
.value-item:nth-child(2n-1) {
    background-color: rgb(245,245,245);
}
.param-item {
    border: 1px solid rgb(240,240,240);
    border-bottom: 0;
    white-space: pre-line;
    padding: 10px;
    line-height: 1.4;
    justify-content: flex-start;
    text-align: left;
}
.param-type-item {
    font-weight: bold;
    color: black;
    font-size: 1.4em;
}
.product-item.product-params .param-type-item {
    white-space: nowrap;
    z-index: 2;
}
.product-list li:nth-child(2) .param-item{
    border-left: 0;
}
.product-list li:nth-last-child(2) .param-item{
    border-right: 0;
}

.product-list li:not(:last-child) .param-type-item{
    border-right: 0;
}
.product-list li:not(:first-child) .param-type-item{
    border-left: 0;
}
.product-list li {
    border-bottom: 1px solid rgb(240,240,240);
}




@media screen and (max-width: 960px) {
    div.main-box {
        padding: 30px 2% 20px;
        margin-top: 0;
    }
    .main-content-box {
        width: 100%;
        padding: 0px 3%;
    }

    .top-bar-outer {
        width: 100%;
        min-width: auto;
    }
    .top-bar-inner {
        width: 100%;
    }
    

    .main-content-box {
        width: 100%;
        min-width: 100%;
        padding: 0px;
    }
    .nav-item {
        padding: 0;
        height: 45px;
        line-height: 45px;
        border-width: 1px;
    }
    .active-item {
        border-width: 1px;
    }
    .type-box {
        overflow-x: scroll;
        margin-top: 30px;
    }

    .product-box {
        width: 100%;
    }
    .product-list {
        width: auto;
    }

    .product-list .product-item {
        width: 45vw;
    }
    .product-img-box {
        height: 178px;
    } 
}