:root {
    --primary-color: rgb(0, 111, 79);
    --secondary-color: #ffffff;
    --gradient-color: rgb(160, 189, 180);
    --gradient-dropdown-color: #73946B;
    --accent-color: #e67e22; /* 强调色-橙色 */
    --text-color: #ffffff; /* 正文颜色 */
    --notes-text-color: rgba(13, 90, 65, 0.72);
    --background-color: rgba(15, 66, 53, 0.4);
    --border-color: rgba(149, 154, 149, 0.56);
    --error-color: #8b0606;
    --error-color-hover: #a42e2e;
}
body {
    background: url('https://uia.njfu.edu.cn/authserver/custom/images/bg1.jpg') no-repeat center center fixed;
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
}

.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}


.logo {
    display: flex;
    flex-direction: row;
    align-items:  center;
    justify-content: center;
    gap: 20px;
    padding-bottom: 20px;
}
.logo h1 {
    color: #ffffff;
}
.logo img {

}

.login-form {
    padding: 38px 30px 30px 30px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.13);
    width: 340px;
    box-sizing: border-box;
    backdrop-filter: blur(10px) brightness(90%);
    background-color: rgba(255, 255, 255, 0.4);
    border-radius: 10px
}

.login-form h2 {
    margin: 0 0 30px 0;
    font-weight: 700;
    color: #20232a;
    text-align: center;
    letter-spacing: 2px;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 7px;
    color: #333;
    font-size: 15px;
    font-weight: 500;
}

.input-group input[type="text"],
.input-group input[type="email"],
.input-group input[type="password"] {
    width: 100%;
    padding: 11px 38px 11px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.2s;
    box-sizing: border-box;
    outline: none;
}

.input-group input:focus {
    border-color: var(--primary-color);
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.toggle-password {
    position: absolute;
    right: 11px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #999;
    font-size: 18px;
    user-select: none;
}

.error-message {
    color: #d93026;
    font-size: 13px;
    margin-top: 3px;
    display: block;
    min-height: 1em;
}

.options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 22px;
    font-size: 14px;
}

.options label {
    display: flex;
    align-items: center;
    gap: 5px;
}

.options .forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.15s;
}
.options .forgot-link:hover {
    text-decoration: none;
    color: var(--text-color);
}

.login-button {
    width: 100%;
    padding: 12px 0;
    background: linear-gradient(90deg, var(--primary-color));
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 2px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.18s;
    margin-bottom: 15px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.login-button:hover {
    background: #fff;
    color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(50, 112, 246, 0.12);
    transform: translateY(-1px) scale(1.04);
}
.login-button:active {
    /* 弹性动画 */
    animation: login-button-press 0.22s;
}
@keyframes login-button-press {
    0%   { transform: scale(1); }
    50%  { transform: scale(0.96);}
    80%  { transform: scale(1.04);}
    100% { transform: scale(1);}
}

.register-link {
    text-align: center;
    font-size: 14px;
}
.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-left: 5px;
    transition: color 0.15s;
}
.register-link a:hover {
    color: var(--text-color);
}