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

body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

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

/* 头部样式 */
.header {
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    margin-bottom: 20px;
}

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

.header h1 {
    font-size: 24px;
}

.header .nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 20px;
}

.header .nav a:hover {
    text-decoration: underline;
}

/* 表单样式 */
.form {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.form h2 {
    margin-bottom: 20px;
    color: #333;
}

.form-group {
    margin-bottom: 15px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 3px;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 16px;
}

.btn:hover {
    background-color: #555;
}

.btn-primary {
    background-color: #007bff;
}

.btn-primary:hover {
    background-color: #0069d9;
}

/* 卡片样式 */
.card {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 15px;
    color: #333;
}

/* 结果显示 */
.result {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 3px;
    margin-top: 15px;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header .container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header .nav {
        margin-top: 10px;
    }
    
    .header .nav a {
        margin-left: 0;
        margin-right: 15px;
    }
}