css-响应式表单

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css3的@media检测到屏幕尺寸，将表格元素设置为block块状，并且隐藏表头，将td设置下边框看起来跟一行行的一样。最后我们使用css3的:before { content: “姓名”; }生成每行对应的标签定义，这样就能知道每行数据的意义。 

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@media only screen and (max-width: 760px),
(min-device-width: 768px) and (max-device-width: 1024px) {
    /* Force table to not be like tables anymore */
    table,
    thead,
    tbody,
    th,
    td,
    tr {
        display: block;
    }
    thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }

    tr {
        border: 1px solid #ccc;
    }

    td {
        /* Behave  like a "row" */
        border: none;
        border-bottom: 1px solid #eee;
        position: relative;
        padding-left: 50%;
    }

    td:before {
        /* Now like a table header */
        position: absolute;
        /* Top/left values mimic padding */
        top: 6px;
        left: 6px;
        width: 45%;
        padding-right: 10px;
        white-space: nowrap;
    }

    /*Label the data*/
    td:nth-of-type(1):before {
        content: "姓名";
    }
    td:nth-of-type(2):before {
        content: "性别";
    }
    td:nth-of-type(3):before {
        content: "出生年月";
    }
}