/*底部*/
        .footer {
            width: 100%;
            min-width: 1200px;
            background: #003366;
            position: absolute;
            right: 0;
            bottom: 0;
            left: 0;
        }

        .footer .copyright {
            margin: 0;
            padding: 6px 0;
            color: rgb(205, 213, 225);
            text-align: center;
            font-size: 12px;
            line-height: 20px;
        }
        /*修改*/
        @media screen and (min-width: 1200px) {
            .mian-content,.header-top,.header,.sidebar .navigation,.footer .links{
                width: 1200px;
            }
        }