*{
    margin: 0;
    border: 0;
}
a{
    text-decoration: none;
}
kbd{
    display: inline-block;
    /*kbd默认是inline属性*/
    border: 1px solid red;
    width: 4em;
    height: 4em;
    text-transform: uppercase;
    /*文本小写变大写*/
    position: relative;

}
kbd>button{
    position: absolute;
    right: 0;
    bottom: 0;
    display: none;
    /*绝对定位到右下角*/

    transition: all 0.3s;
    border-radius: 2px;
}
kbd:hover>button{
    display: inline-block;
    /*鼠标浮到kbd上才出现*/
}
kbd>button:hover{
    background: rgb(238, 152, 24);
    color:#fff;
}
#mainxxxx{
    display: inline-block;

    padding: 20px;
    background: rgba(255,255,255,0.7);
    border-radius: 10px;
}

body {
    /*background: linear-gradient(to bottom, #fff 0%,#888e94 100%);*/
    background: #ccc url("./wall.jpg") repeat center center scroll;

    background-size: cover;
    /*背景完全覆盖*/

}
main {
    margin: 0;
    text-align: center;

    /*绝对居中父元素上的三行代码*/

    display: flex;
    justify-content: center;
    align-items: center;

    height: 100vh;

    min-width: 800px;
    /*设置最小宽度,防止变形*/

}
/*mainxxx这个div居中*/
#mainxxxx>div:nth-child(2){
    margin-left: -30px;

}
#mainxxxx>div:nth-child(3){
    margin-left: -112px;
}
/*美化按键*/
/**/
/*}*/
.kbd{
    margin: 0;
    padding: 0;
    border:0;
    width: 65px;
    height: 50px;

    /*线性渐变:0-70白色,70-100,fff-f3f3f3渐变*/
    background: linear-gradient(to bottom, #fff 0%,#fff 70%,#f3f3f3 100%);
    border-radius: 7px;

    /*下方阴影,box-shadow5个最常用属性,分别是左偏移,右偏移,模糊,扩张,颜色*/
    box-shadow: 0 5px 0 0 #767d81;
    color: #767D81;
    font-family: Helvetical;


    vertical-align: top;
    position: relative;
    /*用flex布局居中文字*/
    /*display: inline-flex;*/
    /*align-items: center;*/
    /*justify-content: center;*/
}
.kbd_wrapper{
    display: inline-block;
    vertical-align: top;
    /*这两句一定要搭配使用!!!!*/

    width: 65px;
    height: 55px;
    /*border:1px solid #3C3C3D;*/
    border-radius: 7px;
    margin: 0 5px;

    /**/
    box-shadow: 0 4px 3px 0 #3C3C3D,0 0 1px 0 #3C3C3D;
    /*下,一圈*/
}
#mainxxxx>div{
    margin: 10px 0;
}

/*让html和body占满屏幕100%的方法*/
/*方法一:!*html,body{*!*/
    /*height: 100%;*/
/*}*/
kbd img{
    width: 16px;
    height: 16px;
    position: absolute;
    left: 7px;
    bottom: 4px;
}
kbd .text{
    position: absolute;
    left: 7px;
    top: 4px;
}
.kbd_wrapper:hover {
    animation: shake 0.82s cubic-bezier(.36,.07,.19,.97) both;
}

.search{
    text-align: center;
    position: fixed;
    top: 130px;
    left: 50%;
    transform: translateX(-50%);
    min-width: 500px;
}
.search #searchInput{
    border: 0;
    background: transparent;
    color: white;
    border-bottom: 3px solid #ccc;
    outline: none;   
    width: 250px;
}
.search .button{
    display: inline-block;
    background: #fff;
    border-radius: 5px;
    border: 2px solid #767D81;
    color: #767D81;
    padding: 5px 10px;
    cursor: pointer;
    user-select:none;

    transition: all .5s;
}
.search .button:hover{
    background: rgb(206, 206, 206);
}
 
.tips{
    position: fixed;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);

    padding:20px;
    padding-top: 10px;
    background: rgba(255,255,255,0.7);
    border-radius: 10px;

}
.tips .title{
    text-align: center;
    font-weight: 600;
    font-size: 21px;
    margin-bottom: 15px;
}
@keyframes shake{
    10%, 90% {
        transform: translate3d(-1px, 0, 0);
    }
    20%, 80% {
        transform: translate3d(2px, 0, 0);
    }
    
    30%, 50%, 70% {
        transform: translate3d(-4px, 0, 0);
    }
    40%, 60% {
        transform: translate3d(4px, 0, 0);
    }
}