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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f5f5f5;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

input[type="text"],
input[type="number"],
input[type="tel"],
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
select:focus {
    outline: none;
    border-color: #4CAF50;
}

.radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.checkbox-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    margin-bottom: 0;
    font-weight: normal;
    white-space: normal;
}

.radio-label input[type="radio"],
.radio-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    flex-shrink: 0;
}

.cascade-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

select:disabled {
    background-color: #f9f9f9;
    cursor: not-allowed;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.submit-btn:active {
    transform: translateY(1px);
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin: 10px;
    }
    
    .cascade-group {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .radio-group,
    .checkbox-group {
        gap: 12px;
    }
    
    h1 {
        font-size: 20px;
    }
}
.input-with-button {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}
.send-btn {
    padding: 10px 12px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s;
}
.send-btn:hover {
    background-color: #45a049;
}
.send-btn:disabled {
    background-color: #9e9e9e;
    cursor: not-allowed;
}