#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}
.head_text {
    padding: 10vh 35px 20px;
}
.big_tit {
    font-size: 30px;
    font-weight: 500;
    color: #000;
}
.desc {
    font-size: 14px;
    color: #777;
}
.footer {
    padding: 10px;
    font-size: 14px;
    color: #888;
    text-align: center;
    margin-top: auto;
}
.login_box {
    padding: 10px 35px;
}
.login_row {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 10px 0;
    border: none;
    border-bottom: 1px solid #f1f1f1;
    margin-bottom: 5px;
}
.login_row img {
    width: 25px;
    height: 25px;
    display: block;
    margin-right: 5px;
}

.login_row input {
    flex: 1;
    border: none;
    font-size: 16px;
    color: #000;
    padding: 5px;
}
.login_row input::placeholder {
    color: #ccc;
}
.login_btn {
    height: 50px;
    font-size: 16px;
    font-weight: 500;
    color: #fff;
    background: -webkit-linear-gradient(left, #3185ff 10%, #7bdefd 90%);
    margin-top: 10px;
    border-radius: 25px;
}
.reg_btn {
    height: 50px;
    font-size: 16px;
    font-weight: 500;
    border: 1px solid #3185ff;
    margin-top: 20px;
    border-radius: 25px;
    color: #3185ff;
}

.login_label {
    padding: 10px 0;
    font-size: 14px;
}
.login_label a {
    color: #999;
}
.login_label span {
    color: #3185ff;
}

.get_code {
    color: #3185ff;
}
.agreement {
    text-align: center;
    padding: 10px 0;
    font-size: 14px;
}
.agreement a {
    color: #3185ff;
}
.head_nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 50px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    border-bottom: 1px solid #f7f8f9;
    background-color: #fff;
    z-index: 111;
}
.nav_icon {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.nav_icon img {
    width: 25px;
    height: 25px;
}
.nav_txt {
    text-align: center;
    font-size: 16px;
    color: #000;
    line-height: 50px;
    font-weight: 500;
    flex: 1;
}
.top_logo {
    display: block;
    width: 160px;
    height: 160px;
    margin: 10vh auto 20px;
}

.nav_blank {
    height: 51px;
}