img {

    filter: grayscale(100%);

}

.nav li:not(:last-child) {

    border-right: 1px solid #333;

}

html, body {

    height: 100%;

    margin:;

}

body {

    align-items: center;

    display: flex;

}

.calendar {

    table-layout: fixed;

}

h1{

    position: relative;

}

h1:after{

    content: '与h1内容相同文字';

    z-index:;

    color: #e3e3e3;

    position: absolute;

    top:;

    left:;

    -webkit-mask-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0,0,0,0)), color-stop(50%, rgba(0,0,0,1)), to(rgba(0,0,0,0)));

}

.disabled {

    pointer-events: none;

}