.masonry {
    -moz-column-count:4; /* Firefox */
    -webkit-column-count:4; /* Safari 和 Chrome */
    column-count:4;
    -moz-column-gap: 2em;
    -webkit-column-gap: 2em;
    column-gap: 2em;
    width: 80%;
    margin:2em auto;
}
.item {
    padding: 1em;
    margin-bottom: 2em;
    -moz-page-break-inside: avoid;
    -webkit-column-break-inside: avoid;
    break-inside: avoid;
    border: 1px solid #A9A9A9;
    border-radius: 5px;
}
.item_content img {
    width: 100%;
    height: 100%;
}
.item_content a {
    display: inline-block;
    color: #636363;
}
.huang {
    font-size: 14px;
    color: chocolate;
}
.item_content a span {
    color: #333333;
    font-size: 13px;
}