html , body{
    height: 100%;
    width: 100%;
    margin: 0;
    border: 0;
    padding: 0;
    line-height: 1;
}

#title{
    height: 10%;
    background-image: url("../IMAGE/hgd_logo.png");
    background-repeat: no-repeat;
    background-size: contain;
    background-color: #d00000;
    text-align: center;
    font-family: cursive;
    color: white;
    padding-top: 2%;
    font-size: 250%;
    margin: 0;
    border: 0;
}

a{
    color: black;
    transition: color 200ms ease 0s;
}

a:hover{
    color: red;
}

pre{
    font-size: 80%;
    width: 100%;
    margin: 0;
    border: 0;
    padding: 0;
}

#search{
    font-size: 25px;
    width: 100%;
    height: 50px;
    text-align: center;
    background-color: #c9cbc7;
    margin: 0;
    border: 0;
    padding-top: 20px;
}

#list{
    position: relative;
    z-index: 10;
    text-align: center;
    background-color: rgba(51,192,255,0.75);
    float: left;
    width: 20%;
    height: 70%;
    overflow: visible;
}

dd.border{
    padding-top: 5%;
    padding-bottom: 5%;
    color: white;
    width: 99%;
    height: 15%;
    font-size: 90%;
    border: 3px ridge black;
    background-color: #88d6ff;
    margin: 0;
    transition: width 300ms ease 0s;
}

dd.border:hover{
    width: 110%;
}


#host_image{
    width: 80%;
    float: right;
    height: 70% ;
    background-image: url("../IMAGE/feng1.jpg");
    background-size: cover; /* 确保图片完全覆盖 */
    background-position: center; /* 图片居中 */
    background-repeat: no-repeat; /*图片不重复*/
    transition: opacity 600ms ease 0s;
}

#fix{
    width: 100%;
    height: 70%;
}

.fast{
    text-align: center;
    font-size: 27px;
    line-height: 32px;
    text-indent: 2em;
    width: 20%;
    height: 50%;
    padding: 50px;
    margin: 5% 1em 1em 2%;
    transition: box-shadow 300ms ease 0s;
    float: left;
    box-sizing: border-box;/*设置块为边界模式可以边界及以内保持不变，添加内边距等只会减小内容大小*/
    border: 5px solid #ff0003; /*没有solid显示样式则无法显示*/
    background-color: #e4faff;
    overflow: auto;
}


.fast:hover{
    box-shadow: 5px 5px 5px #ff0003;
}