/* header制作开始 */
.top {
    width: 100%;
    min-height: 100vh;
    position: relative;
    background-size: cover;
    background-position: center;
    background-image: url(../images/01.png);
}

.top img {
    width: 100%;
    height: 100%;
}

.logo {
    width: 165px;
    max-width: 40%;
    height: auto;
    position: absolute;
    top: 20px;
    left: 50px;
}

@media (max-width: 768px) {
    .logo {
        left: 20px;
        width: 130px;
    }
    .login_box li {
        min-width: 120px;
        margin: 0 5px;
    }
    .login_box li h4 {
        font-size: 14px;
    }
    .register_text {
        font-size: 12px;
    }
}

.logo img {
    width: 100%;
    height: 100%;
}

.register_text {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #ffffff;
    font-size: 14px;
    padding: 5px 10px;
    background-color: rgba(0,0,0,0.3);
    border-radius: 4px;
}

.register_text a {
    color: #ffffff;
}

.register_text a:hover {
    color: #007bff;
}

.login_box {
    width: 90%;
    max-width: 600px;
    height: 51px;
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
}

.login_box li {
    width: 175px;
    height: 50px;
    background-color: #01b1ed;
    margin: 0 12px;
    border-radius: 5px;
    float: left;
    text-align: center;
}

@media (max-width: 768px) {
    .login_box {
        height: auto;
        flex-wrap: wrap;
        top: 65%;
    }
    .login_box li {
        width: 45%;
        margin: 10px 2%;
        float: none;
    }
}

.login_box li img {
    height: 30px;
    width: 30px;
    margin-top: 12px;
    margin-left: 10px;
}

.login_box li h4 {
    display: inline-block;
    vertical-align: middle;
    margin-left: 8px;
    font-size: 16px;
    color: #ffffff;
    font-weight: 400;
    line-height: 1;
}

.bottom_box {
    width: 95px;
    height: 5px;
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
}

.bottom_box li {
    height: 3px;
    width: 40px;
    margin-right: 5px;
    float: left;
}

.bottom_box .white {

    background-color: #fff;
}

/* <!-- header部分制作结束 --> */