* {
        padding: 0;
        margin: 0;
    }
    .container,
    body {
        background-color: #CDCDCD;
    }
    .ctn-nav {
        width: 100%;
        height: 50px;
        background-color: rgba(47, 47, 47, 0.98);
        padding: 0 30%;
    }
    .nav-title {
        width: 600px;
        height: 50px;
    }
    .navctn-tit {
        color: #ddd;
        width: 100px;
        font-size: 24px;
        line-height: 50px;
    }

    .navcrn-ipt {
        width: 300px;
        height: 25px;
        margin-left: 100px;
        border-radius: 5px;
        text-indent: 10px;
        border: none;
    }
    .ctn-middle {
        width: 600px;
        padding: 0 10px;
        margin: 0 auto;
    }
    .mid-h2 {
        margin-top: 20px;
    }
    .mid-span {
        float: right;
        border-radius: 100%;
        color: #666;
        background-color: #E6E6FA;
        width: 25px;
        height: 25px;
        text-align: center;
        line-height: 25px;
        font-size: 14px;
    }
    ol,
    ul {
        margin-top: 5px;
        padding: 0 5px;
        list-style: none;
    }
    button {
        width: 20px;
        height: 20px;
        border-radius: 100%;
    }
    li {
        margin-top: 10px;
        background-color: white;
        border-radius: 5px;
    }
    .delbtn {
        width: 25px;
        height: 25px;
        border-radius: 100%;
        float: right;
        background-color: red;
    }
    .checkdom {
        width: 20px;
        height: 20px;
        margin: 0 10px;
        margin-top: 5px;
    }