前端分享-1.css

/* 总体设置 */
* {
    box-sizing: border-box;
}

/* 外围容器设置 */
.navigation_bar {
    position: fixed;

    top: 10vh;
    left: 35vw;
}
.navigation_bar > ul {
    padding: 1px;
    border: 1px solid rgb(153, 153, 153);
}

/* 容器各项设置 */
.navigation_bar > ul > li {
    float: left;

    position: relative;
}
.navigation_bar > ul > li:hover {
    background-color: rgb(153, 153, 153);
}

/* 容器各项超链接样式设置 */
.navigation_bar > ul > li > a {
    text-decoration: none;
    text-align: center;
    color: black;
    font-weight: bold;
    line-height: 2em;

    display: block;

    width: 100%;
    height: 100%;
    margin-right: 30px;
}
.navigation_bar > ul > li > a:hover {
    color: white;

    outline: 1px solid #ccc;
}

/* 下拉框样式设置部分 */
.select {
    display: none;

    position: absolute;

    width: 100px;
}
.select > li {
    width: 110px;
    height: 30px;
    padding-left: 15px;
    background-color: rgb(230, 230, 230);
    border: 1px solid rgb(153, 153, 153);
    border-bottom: 0px;

    line-height: 30px;
}
.select > li:last-child {
    border-bottom: 1px solid rgb(153, 153, 153);
}
.select > li:hover {
    background-color: white;
}
.select > li > a {
    text-decoration: none;
    text-align: center;
    color: black;
    line-height: 2em;

    width: 100%;
    height: 100%;
}
.select > li > a:hover {
    color: #aaa;
}


/* 实现下拉框与项目样式联动 */
.item:hover .select {
    display: block;
}
.item:hover > a {
    color: white;
}


/* 清除浮动模块 */
.clearfix::before, .clearfix::after{
    content: '';
    display: table;
    clear: both;
    /* 以下代码为了解决 IE 浏览器的兼容问题 */
    height: 0;
    overflow: hidden;
    /* 以下代码为了去隐藏content中的内容 */
    visibility: hidden;
  }