/* 全局样式 */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    padding: 15px 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    text-decoration: none;
}

.navbar-right {
    display: flex;
    align-items: center;
}

.navbar-right a {
    margin-left: 15px;
    text-decoration: none;
    color: #666;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.navbar-right a:hover {
    background-color: #f0f0f0;
}

/* 主内容区域 */
.main-content {
    background-color: #fff;
    padding: 30px;
    margin-top: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

/* 表单样式 */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #666;
}

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

.form-group .submit-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
}

.form-group .submit-btn:hover {
    background-color: #45a049;
}

/* 消息样式 */
.flash-messages {
    margin-bottom: 20px;
}

.flash {
    padding: 10px 15px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.flash.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.flash.danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.flash.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar-right {
        margin-top: 10px;
    }
    
    .navbar-right a {
        margin-left: 10px;
        margin-right: 10px;
    }
}