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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

header, footer {
    background-color: #4a6fa5;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

header h1 {
    margin-bottom: 0.5rem;
}

main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section.tutorial {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.step {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.step:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

h2 {
    color: #4a6fa5;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: #4a6fa5;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.image-container {
    margin: 1.5rem 0;
    text-align: center;
}

.image-container img {
    max-width: 100%;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

ul, ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

ul ul {
    margin-bottom: 0;
}

footer {
    margin-top: 2rem;
    padding: 1rem 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    main {
        margin: 1rem auto;
    }
    
    section.tutorial {
        padding: 1.5rem;
    }
    
    .step {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }
    
    h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    header, footer {
        padding: 1.5rem 0;
    }
    
    section.tutorial {
        padding: 1rem;
    }
    
    .step {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }
    
    h2 {
        font-size: 1.2rem;
    }
}