/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background-color: #fafafa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid #dee2e6;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: #6c757d;
    font-weight: 400;
}

/* 主要内容区域 */
.main {
    padding: 60px 0;
}

/* 概览部分 */
.overview-section {
    margin-bottom: 80px;
}

.car-cards {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.car-card {
    flex: 1;
    background: white;
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.car-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.car-image {
    margin-bottom: 30px;
}

.car-placeholder {
    width: 200px;
    height: 120px;
    border-radius: 12px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
}

.car-placeholder.z9gt {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.car-placeholder.s9t {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.car-name {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 8px;
}

.car-tagline {
    color: #6c757d;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.price-range {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.price-label {
    color: #6c757d;
    font-size: 0.9rem;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e74c3c;
}

.vs-divider {
    font-size: 2rem;
    font-weight: 700;
    color: #6c757d;
    padding: 20px;
}

/* 对比部分通用样式 */
.comparison-section {
    margin-bottom: 80px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 50px;
}

/* 动力系统对比 */
.powertrain-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.powertrain-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.powertrain-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
}

.powertrain-options {
    margin-bottom: 30px;
}

.option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid #e9ecef;
}

.option:last-child {
    border-bottom: none;
}

.option-name {
    font-weight: 600;
    color: #2c3e50;
}

.option-price {
    color: #e74c3c;
    font-weight: 700;
}

.specs {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.spec-label {
    color: #6c757d;
    font-weight: 500;
}

.spec-value {
    font-weight: 700;
    color: #2c3e50;
}

/* 参数对比表格 */
.comparison-table {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th {
    background: #f8f9fa;
    padding: 20px;
    text-align: left;
    font-weight: 700;
    color: #2c3e50;
    border-bottom: 2px solid #dee2e6;
}

.comparison-table td {
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.param-name {
    font-weight: 600;
    color: #2c3e50;
    background: #f8f9fa;
}

/* 配置层级对比 */
.config-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.config-column h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
}

.config-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.config-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
}

.config-card ul {
    list-style: none;
}

.config-card li {
    padding: 8px 0;
    color: #6c757d;
    border-bottom: 1px solid #f1f3f4;
}

.config-card li:last-child {
    border-bottom: none;
}

/* 总结部分 */
.summary-section {
    margin-bottom: 60px;
}

.summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.summary-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.summary-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 25px;
}

.summary-card ul {
    list-style: none;
}

.summary-card li {
    padding: 12px 0;
    color: #6c757d;
    position: relative;
    padding-left: 25px;
}

.summary-card li::before {
    content: "•";
    color: #667eea;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 40px 0;
}

.footer p {
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .car-cards {
        flex-direction: column;
    }
    
    .vs-divider {
        transform: rotate(90deg);
    }
    
    .powertrain-grid,
    .config-comparison,
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.car-card,
.powertrain-card,
.comparison-table,
.config-card,
.summary-card {
    animation: fadeInUp 0.6s ease-out;
}

/* 悬停效果 */
.comparison-table tr:hover {
    background-color: #f8f9fa;
    transition: background-color 0.3s ease;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}