/* 基础样式 */
:root {
    --primary-color: #d81c35;
    --primary-hover: #b01627;
    --text-color: #2c3e50;
    --light-bg: #faf2f3;
    --border-color: #eee;
    --shadow-light: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 16px rgba(216,28,53,0.08);
    --radius: 8px;
    --spacing-sm: 8px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #faf2f3;
    padding: 10px;
}

.container {
    background: linear-gradient(135deg, #fff9fa 0%, #feeaee 100%);
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-light);
}

h1 {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 25px;
    font-size: clamp(1.5rem, 4vw, 2rem);
}

/* 标签页样式 */
.tabs {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    flex-wrap: wrap;
    gap: 2px;
}

/* 下拉选择器样式 */
.tab-selector-container {
    margin-bottom: var(--spacing-lg);
    display: none; /* 默认隐藏，在小屏幕上显示 */
}

.tab-selector {
    width: 100%;
    padding: 12px 15px;
    font-size: 16px;
    color: var(--text-color);
    background-color: #fff;
    border: 2px solid var(--primary-color);
    border-radius: var(--radius);
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d81c35' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    transition: all 0.3s ease;
}

.tab-selector:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(216,28,53,0.2);
    border-color: var(--primary-hover);
}

.tab-selector option {
    padding: 10px;
}

.tablinks {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-bottom: none;
    padding: 12px 15px;
    cursor: pointer;
    border-radius: 4px 4px 0 0;
    font-size: 15px;
    line-height: 1.3;
    white-space: normal;
    transition: all 0.3s ease;
    flex: 1;
    text-align: center;
    min-width: min-content;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.tablinks:hover {
    background-color: #e9ecef;
}

.tablinks.active {
    background-color: #fff;
    border-bottom: 1px solid #fff;
    margin-bottom: -1px;
    color: var(--primary-color);
    font-weight: 600;
}

.tabcontent {
    display: none;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: 0 4px 4px 4px;
    background: #fff;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 输入区域样式 */
.input-card {
    background: #fff;
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-light);
}

.input-section {
    background: rgba(255,255,255,0.95);
    box-shadow: var(--shadow-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-color);
    font-weight: 500;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 15px;
    transition: border-color 0.3s;
}

.input-group input:focus,
.input-group select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(216,28,53,0.1);
}

.input-group input:disabled,
.input-group input.disabled {
    background-color: #f2f2f2;
    color: #999;
    cursor: not-allowed;
}

.checkbox-group {
    margin: 10px 0;
    display: flex;
    align-items: center;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--primary-color);
}

.checkbox-group label {
    font-size: 14px;
}

.note-box {
    background-color: #fcf0f2;
    border: 1px solid #f8d9de;
    border-left: 3px solid var(--primary-color);
    padding: 10px 15px;
    margin: 10px 0 15px 0;
    border-radius: 4px;
    font-size: 13px;
    color: #666;
}

.resident-group,
.non-resident-group {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* 按钮样式 */
.calculate-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    margin: var(--spacing-lg) 0;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.calculate-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.calculate-btn:active {
    transform: translateY(0);
}

/* 结果展示样式 */
.result-section {
    background: #ffffff;
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    margin-top: var(--spacing-lg);
    box-shadow: var(--shadow-light);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.result-card {
    background: var(--light-bg);
    border-radius: 6px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-medium);
    position: relative;
}

.result-card h3 {
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    font-size: 16px;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding: 5px 0;
}

.result-item span:last-child {
    color: var(--primary-color);
    font-weight: 600;
}

.tax-group {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid #eee;
}

.tax-group h3 {
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    font-size: 16px;
}

.result-item.total {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.1em;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed #eee;
    background: #fcf0f2;
    padding: 8px;
    border-radius: 4px;
}

.result-item.total span:last-child {
    color: var(--primary-color);
    font-size: 1.2em;
}

/* 计算依据高亮样式 */
.highlighted-basis {
    background-color: #fcf0f2;
    border: 1px solid #f8d9de;
    border-radius: 3px;
    padding: 3px 6px;
    margin: 0 -2px;
    display: inline-block;
    line-height: 1.4;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .desktop-tabs {
        display: none; /* 在小屏幕上隐藏传统标签页 */
    }
    
    .tab-selector-container {
        display: block; /* 在小屏幕上显示下拉选择器 */
        position: relative; /* 添加相对定位 */
        z-index: 10; /* 添加层级，确保在顶层 */
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .input-section, 
    .result-section,
    .input-card {
        padding: var(--spacing-md);
    }
}

/* 平板/中等屏幕专用样式 */
@media (min-width: 481px) and (max-width: 768px) {
    .tab-selector {
        max-width: 500px;
        margin: 0 auto;
        display: block;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
    
    .container {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }
    
    .tab-selector {
        font-size: 14px;
        padding: 10px 12px;
    }
    
    .tabcontent {
        padding: 12px;
    }
    
    .input-group label {
        font-size: 14px;
    }
    
    .input-group small {
        font-size: 12px;
        display: block;
        margin-top: 3px;
    }
    
    .input-group input,
    .input-group select {
        padding: 8px 10px;
        font-size: 14px;
    }
    
    .calculate-btn {
        padding: 10px;
        font-size: 15px;
        margin: 15px 0;
    }
    
    .result-section,
    .input-section,
    .input-card {
        padding: 12px;
    }
    
    .result-card {
        padding: 10px;
    }
    
    .result-item {
        font-size: 13px;
        flex-wrap: wrap;
        position: relative;
        padding-right: 45%;
        min-height: 30px;
        margin-bottom: 12px;
    }
    
    /* 改进复杂计算结果在移动端的显示 */
    .tax-group h3 {
        font-size: 15px;
    }
    
    .tax-group h3 small {
        display: block;
        margin-top: 4px;
    }
    
    /* 确保结果项的对齐，防止文字折行导致混乱 */
    .result-item span:first-child {
        position: relative;
        width: 100%;
        padding-right: 5px;
        line-height: 1.4;
    }
    
    .result-item span:last-child {
        position: absolute;
        right: 0;
        top: 0;
        text-align: right;
        width: 45%;
        line-height: 1.4;
        word-break: break-word;
    }
    
    /* 强调总计行 */
    .result-item.total {
        padding-right: 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        min-height: 36px;
    }
    
    .result-item.total span:last-child {
        position: static;
        width: auto;
    }
    
    /* 优化复选框在移动端的显示 */
    .checkbox-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .checkbox-group label {
        margin-bottom: 8px;
    }
    
    /* 优化多个复选框并排显示的情况 */
    .non-resident-group .checkbox-group label {
        margin-bottom: 10px;
    }
    
    /* 移动端高亮区域优化 */
    .result-item span.highlighted-basis {
        background-color: #fcf0f2;
        border: 1px solid #f8d9de;
        padding: 2px 4px;
        display: inline-block;
        word-break: break-word;
        margin-top: -2px;
    }
    
    .highlighted-basis h3 {
        font-size: 1em;
    }
}

/* 二维码区域样式 */
.qrcode-container {
    margin: 30px auto;
    padding: 30px 25px 25px;
    text-align: center;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    max-width: 500px;
    border: 1px solid #f8d9de;
}

.qrcode-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 20px;
}

.qrcode-image {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    display: block;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.qrcode-description {
    font-size: 14px;
    margin-top: 20px;
    line-height: 1.4;
    font-weight: 500;
    color: #d81c35;
}

/* 响应式二维码样式 */
@media (max-width: 768px) {
    .qrcode-container {
        padding: 20px;
        margin: 25px auto;
    }
    
    .qrcode-image {
        width: 150px;
        height: 150px;
    }
    
    .qrcode-title {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .qrcode-container {
        padding: 15px;
        margin: 20px auto;
    }
    
    .qrcode-image {
        width: 140px;
        height: 140px;
    }
    
    .qrcode-title {
        font-size: 15px;
        margin-bottom: 15px;
    }
    
    .qrcode-description {
        font-size: 13px;
        margin-top: 15px;
    }
}

/* 特定计算器结果区域的自定义样式 */
/* 个人买卖二手住宅计算器结果区域 */
#resultSection .result-card,
#resultSection .tax-group,
/* 企业持有房屋房产税计算器结果区域 */
#corporatePropertyTaxResult .result-card,
#corporatePropertyTaxResult .tax-group:not(:last-child) {
    background-color: #ffffff;
}

/* 其他已有的特定计算器结果项 */
#propertyTaxResult .result-card,
#resultSection .tax-group:not(.total) .result-item:not(.total),
#corporateTaxResult .tax-group:not(:last-child) .result-item:not(.total) {
    background-color: #ffffff;
}

/* 注意：总计部分的背景色由原有的.result-item.total样式控制，不需要重复定义 */

/* Multi-owner Styles */
.owner-info-group {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    background-color: #fcfcfc;
    position: relative;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.owner-info-group h4 {
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
    font-size: 1.1em;
    color: #333;
}

.remove-owner-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background-color: #f7f7f7;
    border: 1px solid #ddd;
    color: #888;
    padding: 4px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background-color 0.2s, color 0.2s;
}

.remove-owner-btn:hover {
    background-color: #e74c3c;
    color: #fff;
    border-color: #e74c3c;
}

.add-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: transparent;
    color: #e74c3c;
    border: 2px dashed #e74c3c;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
    transition: background-color 0.2s, color 0.2s;
}

.add-btn:hover {
    background-color: rgba(231, 76, 60, 0.05);
}