CSS

body {
    /* 页面背景色 */
    background-color: lightblue;
    /* 页面背景图像 */
    background-image: url();
}

p {
    background-color: "red";
    color: "red";
    /* 边框宽度、样式、颜色 */
    border: 2px solid Tomato;
    /* 圆角 */
    border-radius: 5px;

    margin-top: 100px;
    margin-bottom: 100px;
    margin-right: 150px;
    margin-left: 80px;
}