.background {
    position: absolute;
    background: url('/images/login-0a384837bfff7d093d498fa32f1196b7.jpg') center bottom no-repeat;
    background-size: cover;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.login_logo {
    background: url('/images/logo-f50378e0893e6f26b1383231bfedbf3a.png') no-repeat center center;
    width: 212px;
    height: 79px;
    margin: 0 auto;
}

.form-horizontal {
    padding: 18px 10px 8px 10px;
}

.panel {
    width: 280px;
    height: 378px;
    position: absolute;
    background: transparent;
}

.panel-body {
    margin-top: 30px;
    background: #ffffff;
    border-radius: 5px;
}

.deng_lu {
    width: 280px;
    height: 50px;
    margin: 30px auto;
    color: #fff;
    font-size: 22px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 5px;
    text-align: center;
    line-height: 50px;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(51, 51, 51, 0.6);
}

.panel-heading {
    font-size: 24px;
    color: #F0F0F0;
    text-align: center;
}

.username {
    background: #e0e0e0;;
    text-indent: 5px;
    width: 230px;
    height: 38px;
}

.password {
    background: #e0e0e0;;
    text-indent: 5px;
    width: 230px;
    height: 38px;
}

.tu_left {
    margin-left: 50px;
}

.bing_tu > div > ul > li {
    float: left;
}