* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}

/* 头部样式 */
.header {
    background: #1a2b4c;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 40px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #00a1e9;
}

/* 登录表单区域 */
.login-container {
    min-height: 70vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f5f7fa;
}

.login-form {
    background: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.form-title {
    text-align: center;
    color: #1a2b4c;
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.login-btn {
    width: 100%;
    padding: 0.8rem;
    background: #00a1e9;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.login-btn:hover {
    background: #0086c3;
}

.extra-links {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.extra-links a {
    color: #666;
    text-decoration: none;
}

/* 底部样式 */
.footer {
    background: #1a2b4c;
    color: white;
    padding: 2rem 5%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-info h3 {
    color: #00a1e9;
    margin-bottom: 1rem;
}

.copyright {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .login-form {
        margin: 1rem;
        padding: 1.5rem;
    }
}