body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
}

.login-container {
    max-width: 400px;
    /* 减少内边距以减小表单高度 */
    padding: 15px 50px; 
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    /* 让表单在垂直和水平方向都居中 */
    margin: auto; 
}

.login-container h2 {
    text-align: center;
    margin-bottom: 15px;
}

.login-container label {
    display: block;
    margin-bottom: 5px;
}

.login-container input[type="text"],
.login-container input[type="password"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 12px;
    border: 1px solid #ddd;
    border-radius: 3px;
}

.login-container input[type="submit"] {
    width: 100%;
    padding: 10px;
    /* 设置按钮颜色 */
    background-color: var(--primary-color);; 
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.login-container input[type="submit"]:hover {
    /* 鼠标悬停时颜色加深 */
    background-color: var(--primary-color);; 
}

.error {
    color: var(--primary-color);;
    margin-bottom: 15px;
    text-align: center;
}

.captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
}

.captcha-row input[type="text"] {
    flex: 1;
    margin-bottom: 0;
}

.captcha-row img {
    height: 35px; /* 可根据实际情况调整高度 */
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #f8f9fa;
    border-top: 1px solid #e2e6ea;
}