* {
    padding: 0;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

a {
    text-decoration-line: none;
    color: #000;
}

.fl-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.fl-row-center {
    display: flex;
    align-items: center;
}

.fl-col-center {
    display: flex;
    justify-content: center;
}

.fl-main-start {
    display: flex;
    justify-content: flex-start;
    align-items: center;

}

.magrin-left-10 {
    margin-left: 10px;
}

.magrin-left-20 {
    margin-left: 20px;
}

.m-t-44 {
    margin-top: 44px;
}

.max-width-1200 {
    width: 1200px;
}

/* M站 定位内容最大和最小宽度 */
.m-main {
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}


/* --------------------------- */
.mask-wrap {
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    box-sizing: border-box;
    z-index: 99999;
    animation: mask-wrap-animation .2s;
}

@keyframes mask-wrap-animation {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

.mask-content {
    width: 264px;
    height: 266px;
    padding: 24px 0;
    margin: 45% auto 0;
    box-sizing: border-box;
    background: #FFFFFF;
    border-radius: 12px;
    display: flex;
    align-items: center;
    flex-direction: column;
    position: relative;
    animation: mask-content-animate .3s;
}

@keyframes mask-content-animate {
    0% {
        opacity: 0;
        transform: scale(0);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.mask-title {
    font-weight: 500;
    font-size: 20px;
    color: #100D24;
}

.mask-close-img {
    width: 16px;
    height: 16px;
    position: absolute;
    top: 13px;
    right: 13px;
}

.mask-content-img {
    width: 138px;
    height: 138px;
    margin: 16px 0;
}

.mask-content-download {
    font-size: 14px;
    color: #100D24;
}