.a-loading{position: fixed;top: 0px;left: 0px;right: 0px;bottom: 0px;z-index:20191014;background-color: rgba(0, 0, 0, 0.6);}
/**加载动画**/
.wave-loader {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    height: 40px;
    margin: 20px auto;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -20px;
    margin-left: -20px;
}

.wave-loader div {
    width: 6px;
    height: 20px;
    margin: 0 3px;
    background-color: #16d17f;
    animation: wave 1.2s infinite ease-in-out;
}

.wave-loader div:nth-child(1) { animation-delay: 0s; }
.wave-loader div:nth-child(2) { animation-delay: 0.1s; }
.wave-loader div:nth-child(3) { animation-delay: 0.2s; }
.wave-loader div:nth-child(4) { animation-delay: 0.3s; }
.wave-loader div:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 40%, 100% { transform: scaleY(0.4); }
    20% { transform: scaleY(1); }
}