/* 通用头部，底部设计 */
    
    .header {
        height: 60px;
        background: #f2f2f2;
    }
    
    .navbar-brand>img {
        display: block;
        width: 140px;
        height: 40px;
        line-height: 40px;
        margin-left: -156px;
        margin-top: -10px;
    }
    
    .footer {
        height: 160px;
        background: #ccc;
        text-align: center;
    }
    
    .footer-1,
    .footer-2 {
        height: 51px;
        line-height: 51px;
    }
    
    .footer-3 {
        height: 60px;
        line-height: 60px;
    }
    
    .footer-1 li {
        list-style: none;
        float: left;
    }
    
    .footer-1 a {
        color: #000;
        text-align: center;
        margin-left: 15px;
        padding-left: 110px;
    }
    
    .footer-2 li {
        list-style: none;
        float: left;
        margin-left: 100px;
    }
    
    .footer-2 a {
        color: #000;
        text-align: center;
        margin-left: 16px;
        padding-left: 40px;
    }
    
    .footer-3 img {
        margin-left: 35px;
        margin-right: 20px;
    }
    /* 暗黑模式 */