/* 基本样式 */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #280ed2;
    background-color: #f5f5f5;
}

/* 头部样式 */
header {
    background-color: #13004c;
    box-shadow: 0 2px 4px rgba(69, 71, 78, 0.093);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo h1 {
    margin: 0;
    font-size: 1.2rem;
    margin-left: 10px;
    color: #4992e7;
}

/* 导航栏样式 */
nav ul {
    padding: 0;
    list-style-type: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #4992e7;
    text-decoration: none;
    font-weight: bold;
}

nav ul li a:hover,
nav ul li a.active {
    color: #fdfdfd;
}

/* 主要内容样式 */
main {
    padding-top: 80px;
    min-height: calc(100vh - 160px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-container {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.auth-container h2 {
    color: #4a90e2;
    margin-bottom: 20px;
    text-align: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn {
    display: inline-block;
    background-color: #4a90e2;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 16px;
    border: none;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #3a7bc8;
}

.auth-links {
    margin-top: 20px;
    text-align: center;
}

.auth-links a {
    color: #4a90e2;
    text-decoration: none;
}

.auth-links a:hover {
    text-decoration: underline;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }

    nav ul {
        margin-top: 20px;
    }

    nav ul li {
        margin: 0 10px;
    }

    .auth-container {
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 20px;
    }
}