* {
    margin: 0;
    padding: 0;
    /* css3盒子模型 */
    box-sizing: border-box;
}
/* 版心 */
.w {
    width: 1200px;
    margin: 0 auto;
}
/* em 和 i 斜体的文字不倾斜 */
em,
i {
    font-style: normal
}
/* 去掉li 的小圆点 */
li {
    list-style: none
}

img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* border 0 照顾低版本浏览器 如果 图片外面包含了链接会有边框的问题 */
    border: 0;
    /* 取消图片底侧有空白缝隙的问题 */
    vertical-align: middle
}

button {
    /* 当我们鼠标经过button 按钮的时候，鼠标变成小手 */
    cursor: pointer
}

a {
    color: #333;
    text-decoration: none
}

p {
    font-size: 14px;
    color: #333;
}

button,
input {
    /* "\5B8B\4F53" 就是宋体的意思 这样浏览器兼容性比较好 */
    font-family: Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, "\5B8B\4F53", sans-serif;
    /* 默认有灰色边框我们需要手动去掉 */
    border: 0; 
    outline: none;
}

body {
    /* CSS3 抗锯齿形 让文字显示的更加清晰 */
    -webkit-font-smoothing: antialiased;
    font: 12px/1.5 Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, "\5B8B\4F53", sans-serif;
    color: #666
}

.box {
    position: relative;
    width: 100%;
    height: 100vh;
    background-color: #ebf3f9;
}

.box_cont {
    position: absolute;
    width: 1280px;
    height: 636px;
    display: flex;
    background-color: #fff;
    margin:-318px 0 0 -640px;
    top: 50%;
    left: 50%;
    border-radius: 35px;
    overflow: hidden;
}

.box_cont_img {
    width: 55%;
    height: 100%;
    background: url('../images/tup.jpg') no-repeat;
    background-size: 100% 100%;
}

.box_cont_logo {
    position:relative;
    width: 45%;
    height: 100%;
}

.box_cont_logo_back {
    position: absolute;
    top: 15px;
    right: 20px;
    padding: 10px;
    font-size: 14px;
    cursor: pointer;
}

    .box_cont_logo_back a:hover {
        color: #0c53f5 !important;
    }

    .box_cont_logo_title {
        margin-top: 100px;
        font-size: 32px;
        color: #0c53f5;
        text-align: center;
    }

.box_cont_logo_num,
.box_cont_logo_password,
.box_cont_logo_yzm {
    width: 360px;
    height: 47px;
    margin: 30px auto;
    padding: 0 10px;
    display: flex;
    align-items: center;
    border: 1px solid #eff1f2;
    border-radius: 5px;
}

.box_cont_logo_password {
    padding: 0;
    display: none;
}

.box_cont_logo_wjmm {
    width: 360px;
    margin: 30px auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.box_cont_logo_yzm {
    display: none;
    justify-content: space-between;
    border: none;
    padding: 0;
}

.box_cont_logo_password_left {
    flex: 1;
    height: 47px;
    margin-right: 20px;
    padding: 0 10px;
    display: flex;
    align-items: center;
    border: 1px solid #eff1f2;
    border-radius: 5px;
}

.box_cont_logo_password_right {
    width: 125px;
    height: 47px;
    line-height: 45px;
    text-align: center;
    font-size: 14px;
    color: #0c53f5;
    border: 1px solid #0c53f5;
    border-radius: 5px;
    float: right;
}

.box_cont_logo_xy {
    width: 360px;
    margin: 30px auto;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    font-size: 14px;
    color: #999;
}

.box_cont_logo_xy a {
    color: #0c53f5;
}

.box_cont_logo_btn {
    width: 360px;
    height: 47px;
    margin: 30px auto;
    color: #fff;
    font-size: 16px;
    line-height: 45px;
    text-align: center;
    background-image: linear-gradient(#094cd6, #0371d9);
    border-radius: 5px;
}

.box_cont_logo_text {
    margin-top: 100px;
    text-align: center;
    font-size: 14px;
}

.box_cont_logo_text a {
    color: #0c53f5;
}

.tab {
    cursor: pointer;
}