body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    color: #333;
}

.container {
    background-color: #fff;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    width: calc(100vw * 3 / 4); 
    max-width: 800px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    margin-bottom: 40px;
    font-size: 2.5em;
    color: #007bff;
}

.input-group {
    margin-bottom: 25px;
    text-align: left;
    width: 100%;
}

.input-group {
   display: flex;
   align-items: center;
   margin-bottom: 20px;
   flex-wrap:wrap;
}

.input-group > label {
    display: block;
    margin-bottom: 8px;
    font-size: 1.1em;
    width: 150px;
    text-align: left;
    padding-right: 15px;
}

.input-group > div{
    flex:1;
    margin-bottom:0;
    position: relative;
}

input[type="number"],
select {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    box-sizing: border-box;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s ease-in-out;
}

input[type="number"]:focus,
select:focus {
    border-color: #007bff;
}

button {
    width: 100%;
    padding: 18px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2em;
    transition: background-color 0.2s ease-in-out;
    margin-top: 20px;
}

button:hover {
    background-color: #0056b3;
}

.result {
    margin-top: 30px;
    font-size: 1.3em;
    white-space: nowrap;
    text-align: center;
}

#divorce-sub-options {
    display: inline-flex;
    margin-left:10px;
}

#intellectual-property-sub-options {
    display: inline-flex;
    margin-left:10px;
}

#administrative-sub-options{
    display: inline-flex;
    margin-left:10px;
}

.additional-box1, .additional-box2 {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 8px;
    margin-top: 15px;
    display: inline-block;
    width: calc(50% - 10px);
    box-sizing: border-box;
    text-align:center;
}

.additional-box1{
    margin-right:5px;
}

.additional-box2{
    margin-left:5px;
}

@media (max-width: 768px) {
    .container {
        width: 90%;
        padding: 30px;
    }
    
    .input-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .input-group > label {
        width: auto;
        padding-right:0;
        margin-bottom:5px;
    }
    
    .additional-box1, .additional-box2{
        width: 100%;
        margin-left:0;
        margin-right:0;
    }
}

/* 说明弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1100;
    overflow-y: auto;
}

.modal-content {
    position: relative;
    background-color: #fff;
    margin: 20px auto;
    padding: 20px;
    width: 90%;
    max-width: 700px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.instructions-content {
    font-size: 14px;
    line-height: 1.5;
}

.instructions-content h2 {
    font-size: 20px;
    margin: 0 0 15px 0;
}

.instruction-section {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.instruction-section h3 {
    color: #1890ff;
    margin: 0 0 10px 0;
    font-size: 16px;
}

.instruction-item {
    margin-bottom: 12px;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 6px;
}

.instruction-item:last-child {
    margin-bottom: 0;
}

.instruction-item h4 {
    color: #333;
    margin: 0 0 6px 0;
    font-size: 15px;
}

.instruction-item p {
    margin: 4px 0;
    color: #666;
}

.instruction-item ul {
    margin: 4px 0;
    padding-left: 20px;
    color: #666;
}

.close-btn {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 24px;
    color: #666;
    cursor: pointer;
    transition: color 0.3s;
}

.close-btn:hover {
    color: #333;
}