#div_mask {
    width: 100%;
    position: fixed;
    background-color: black;
    opacity: 0.3;
    display: none;
    top: 0;
    height: 100%;
    z-index: 99;
    left: 0;
}

/* 可选参数 */
#spec-param {
    position: fixed;
    bottom: -600px;
    width: 100%;
    background-color: white;
    z-index: 999;
    padding: 10px;
    transition: all .2s ease-in-out;
}
#spec-param .product-info {
    display: flex;
    border-bottom: 1px solid #EAEAEA;
    padding-bottom: 10px;
}
#spec-param .product-info .cover {
    width: 50px;
    height: 50px;
}
#spec-param .product-info .cover img {
    width: 50px;
    height: 50px;
    border-radius: 4px;
}
#spec-param .product-info .detail {
    margin-left: 10px;
}
#spec-param .product-info .detail .price {
    color: #FF6D00;
}
#spec-param .product-info .detail .price .vip-price {
    background-color: #FF6D00;
    color: white;
    font-size: 16px;
    border-radius: 20px;
    font-weight: bold;
    padding: 3px 10px;
    margin-left: 10px;
}
#spec-param .product-info .detail .description {
    color: #FF6D00;
    margin-top: 10px;
}
#spec-param .param-detail {
    padding-bottom: 10px;
    border-bottom: 1px solid #EAEAEA;
    max-height: 300px;
    overflow-y: auto;
}
#spec-param .param-detail .param-specification {
    color: #868686;
    border-bottom: 1px solid #EAEAEA;
    padding-bottom: 10px;
    margin-bottom: 10px;
}
#spec-param .param-detail .param-specification p {
    margin-top: 6px;
}
#spec-param .param-detail .param-specification p span {
    width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
}
#spec-param .param-detail .param-specification .product-title p {
    font-size: 16px;
    padding: 5px 0;
    color: #333333;
}
#spec-param .param-detail li {
    border: 1px solid rgba(225,225,225,1);
    padding: 5px 6px;
    font-size: 10px;
    color: #868686;
    margin-top: 5px;
    border-radius: 4px;
    display: inline-block;
}
#spec-param .param-detail .cur {
    border: 1px solid #FF6D00;
    color: #FF6D00;
}
#spec-param .purchase-amount {
    display: flex;
    justify-content: space-between;
    padding-top: 10px;
}
#spec-param .purchase-amount .right-content span {
    vertical-align: middle;
}
#spec-param .param-bottom {
    padding: 20px 0;
}
#spec-param .param-bottom .confirm-btn {
    width: 100%;
    height: 32px;
    background-color: #FF6D00;
    color: white;
    border: none;
    font-weight: bold;
    border-radius: 20px;
}