来自柯南百科
.top-card {
    padding: 12px 20px;
    padding-bottom: 50px;
    border: 1px solid #dcdcdc;
    border-radius: 20px;
    background-color: #fcfcfc;
    box-shadow: 0 0 2px #ccc;
    transition: box-shadow .5s cubic-bezier(0.22, 0.61, 0.36, 1);
    color: #464646;
    position: relative;
}

.top-card:hover {
    box-shadow: 0 0 5px #bbb;
}

.border-wrap {
    display: inline-block;
    position: relative;
    padding-bottom: 3.5px;
}

.wrap-green {
    background: linear-gradient(to right, #64c172, rgba(169, 248, 188, 0.678), rgba(255, 255, 255, 0));
}

.wrap-blue {
    background: linear-gradient(to right, #6a6cc7, rgba(97, 184, 221, 0.678), rgba(255, 255, 255, 0));
}

.wrap-red {
    background: linear-gradient(to right, #e34e4e, rgba(199, 119, 119, 0.678), rgba(255, 255, 255, 0));
}

.wrap-yellow {
    background: linear-gradient(to right, #ff8000, rgba(255, 80, 0, 0.37), rgba(255, 255, 255, 0));
}

.wrap-purple {
	background: linear-gradient(to right, #a24b9d, rgba(179, 133, 177, 0.678), rgba(255, 255, 255, 0));
}

.wrap-black {
    background: linear-gradient(to right, #2b2b2b, rgba(110, 110, 110, 0.678), rgba(255, 255, 255, 0));
}

.top-card-title {
    display: inline-block;
    padding-left: 2px;
    background-color: #fcfcfc;
    font-weight: bolder;
    font-weight: 900;
    font-size: 1.2em;
    letter-spacing: 5px;
    -webkit-user-select: none;
    user-select: none;
}

.top-card-link {
	height: 18px;
	width: 21px;
    line-height: 1em;
    font-size: 1.2em;
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
    position: absolute;
    right: 18px;
    top: 18px;
}

.top-card-link a {
    color: #45494d;
    text-decoration: none;
    transition: all .3s linear;
}

.top-card-link a:hover {
    color: #858585;
}

.top-card-content {
    margin-top: 5px;
}

@media{
    .top-card {
        border: 1px solid #3c3c3c;
        background-color: #313131;
        box-shadow: 0 0 2px #5d5d5d;
        color: #c4c4c4;
    }

    .top-card:hover {
        box-shadow: 0 0 5px #535353;
    }

    .top-card-title {
        background-color: #313131;
    }
}