@media (max-width: 768px) {
    .sect {
        margin-bottom: 3.2rem;
    }

    .list-group-item {
        border: none;
    }

    .gongaobox {
        display: flex;
        justify-content: center;
        align-items: flex-start;
        margin-top: 100px;
        min-height: 100vh;
    }
    .pingjibox {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .contenttime {
        color: #333333; 
        margin-top: 10px;
        margin-bottom: 15px;
    }
    .contentdetail {
        width: 400px;
        height: 200px;
        background-color: red;
       }

    .zhengshutext {
        margin-top: 20px;
    }

    .titlecolor {
        font-weight: 400;
        color: #000000;
    }

}

@media (min-width: 769px) {
    .left {
        min-width: 500px;
    }
    .gongaobox {
        display: flex;
        justify-content: center;
        align-items: flex-start;
        margin-top: 150px;
        min-height: 100vh;
    }
    .pingjibox {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .contenttime {
        color: #333333; 
        margin-top: 10px;
        margin-bottom: 15px;
    }
   .contentdetail {
    width: 400px;
    height: 200px;
    background-color: red;
   }
    .zhengshutext {
        margin-top: 20px;
    }

    .titlecolor {
        font-weight: 400;
        color: #000000;
    }

}