html {
    height: 100%
}

body.signin {
    height: 100vh;
    background: url(../img/login-background.jpg) no-repeat center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    color: rgba(255, 255, 255, .95);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body.signin::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, .35);
    z-index: 0;
}

.signinpanel {
    position: relative;
    z-index: 1;
    width: 420px;
    max-width: 90vw;
    margin-left: 600px;
}

/* ========== Logo 区域 ========== */
.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo h1 {
    font-size: 26px;
    font-weight: 600;
    color: #fff;
    margin: 0 0 8px 0;
    letter-spacing: 2px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, .3);
}

.login-logo p {
    font-size: 13px;
    color: rgba(255, 255, 255, .7);
    margin: 0;
    letter-spacing: 1px;
}

/* ========== 登录卡片 ========== */
.login-box {
    background: #fff;
    border-radius: 8px;
    padding: 40px 36px 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .2);
}

.login-box .login-title {
    font-size: 18px;
    color: #333;
    text-align: center;
    margin: 0 0 28px 0;
    font-weight: 500;
    letter-spacing: 1px;
}

.login-box .form-group {
    margin-bottom: 20px;
}

.login-box .form-group:last-of-type {
    margin-bottom: 10px;
}

/* ========== 输入框图标 ========== */
.input-icon {
    position: relative;
}

.input-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 16px;
    z-index: 2;
    transition: color .3s;
}

.input-icon .form-control {
    padding-left: 40px !important;
    height: 44px !important;
    border-radius: 4px !important;
    border: 1px solid #000;
    font-size: 14px;
    color: #333;
    transition: border-color .3s, box-shadow .3s;
}

.input-icon .form-control:focus {
    border-color: #1ab394 !important;
    box-shadow: 0 0 0 3px rgba(26, 179, 148, .12) !important;
}

/* 验证码输入框 */
.signinpanel .code {
    padding-left: 14px !important;
    height: 44px !important;
    border-radius: 4px !important;
    border: 1px solid #e5e5e5;
    font-size: 14px;
    color: #333;
    margin: 0;
}

.signinpanel .code:focus {
    border-color: #1ab394 !important;
    box-shadow: 0 0 0 3px rgba(26, 179, 148, .12) !important;
}

/* 验证码图片 */
.signinpanel .imgcode {
    width: 100%;
    height: 44px;
    border-radius: 4px;
    cursor: pointer;
    border: 1px solid #e5e5e5;
    object-fit: cover;
}

/* ========== 记住我 ========== */
.login-remember {
    padding-top: 4px;
}

.login-remember label {
    color: #777;
    font-size: 13px;
    font-weight: normal;
    cursor: pointer;
    margin: 0;
}

.login-remember input[type="checkbox"] {
    margin-right: 4px;
    vertical-align: middle;
}

/* ========== 登录按钮 ========== */
.btn-login {
    height: 44px;
    background: #1ab394;
    border: none;
    color: #fff;
    font-size: 16px;
    border-radius: 4px;
    letter-spacing: 4px;
    cursor: pointer;
    transition: background .3s, box-shadow .3s;
    margin-top: 8px;
}

.btn-login:hover {
    background: #18a689;
    box-shadow: 0 4px 12px rgba(26, 179, 148, .4);
}

.btn-login:active {
    background: #149077;
}

.btn-login:disabled {
    background: #a0d9cc;
    cursor: not-allowed;
}

/* ========== 页脚 ========== */
.signup-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 0;
    border-top: none;
    color: rgba(255, 255, 255, .6);
    font-size: 12px;
}

.signup-footer .pull-left {
    float: none !important;
}

/* ========== 错误样式 ========== */
label.error {
    color: #ed5565;
    font-size: 12px;
    font-weight: normal;
    margin-top: 4px;
    display: block;
    position: inherit;
}

/* ========== 响应式 ========== */
@media screen and (max-width: 480px) {
    .signinpanel {
        width: 92vw;
        max-width: 92vw;
    }

    .login-box {
        padding: 28px 20px 24px;
    }

    .login-logo h1 {
        font-size: 22px;
    }

    .login-logo p {
        font-size: 11px;
    }
}