* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

header p {
    color: #7f8c8d;
}

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

.form-section h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #34495e;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input[type="file"] {
    display: none;
}

.file-upload {
    border: 2px dashed #ddd;
    border-radius: 5px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    position: relative;
}

.file-upload::before {
    content: '点击或拖拽文件到此处上传';
    color: #7f8c8d;
}

.preview {
    margin-top: 1rem;
    max-width: 200px;
    margin: 1rem auto 0;
}

.preview img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.form-submit {
    text-align: center;
}

button[type="submit"] {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button[type="submit"]:hover {
    background-color: #2980b9;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .form-section {
        padding: 1.5rem;
    }
}