CSS样式声明顺序

.declaration-order {
    /* Positioning */
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 100;

    /* Box-model */
    display: block;
    float: right;
    width: 100px;
    height: 100px;

    /* Typography */
    font: normal 13px "Helvetica Neue", sans-serif;
    line-height: 1.5;
    color: #333;
    text-align: center;

    /* Visual */
    background-color: #f5f5f5;
    border: 1px solid #e5e5e5;
    border-radius: 3px;

    /* Misc */
    opacity: 1;
}