/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #4e73df;
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #4e73df;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #4e73df;
    color: white;
}

.btn-primary:hover {
    background-color: #2e59d9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(78, 115, 223, 0.3);
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* 表单样式 */
.form-container {
    max-width: 450px;
    margin: 3rem auto;
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #4e73df;
    box-shadow: 0 0 0 2px rgba(78, 115, 223, 0.2);
}

.error-message {
    color: #e74a3b;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.success-message {
    color: #1cc88a;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

/* 用户信息样式 */
.user-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.info-item {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 5px;
}

.info-label {
    font-size: 0.875rem;
    color: #6c757d;
    margin-bottom: 0.25rem;
}

.info-value {
    font-weight: 500;
    color: #333;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .form-container {
        margin: 2rem auto;
        padding: 1.5rem;
    }
    
    .user-info {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-container {
    animation: fadeIn 0.5s ease;
}

/* 加载状态 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(78, 115, 223, 0.3);
    border-radius: 50%;
    border-top-color: #4e73df;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 页脚样式 */
.footer {
    text-align: center;
    padding: 2rem 0;
    color: #6c757d;
    font-size: 0.875rem;
    margin-top: 3rem;
}