body{
    margin: 0 auto;
}
.container{
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/*主体*/
.about{
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.aiv1{
  width: 100%;
  max-width: 390px;
  height: auto;
}
/* 添加图片自适应样式 */
.aiv1 img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.aiv2 {
    margin: 15px 0;
    text-align: center;
}

.aiv3 {
    margin: 15px 0;
    padding: 0 15px;
}

.about-content {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.about-content h3 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.about-content h4 {
    font-size: 14px;
    font-weight: bold;
    margin-top: 15px;
    margin-bottom: 8px;
    color: #444;
}

.about-content h5 {
    font-size: 13px;
    font-weight: bold;
    margin-top: 12px;
    margin-bottom: 6px;
    color: #555;
}

.about-content p {
    font-size: 13px;
    margin-bottom: 12px;
    color: #666;
}

.about-content ul {
    margin-left: 20px;
    margin-bottom: 12px;
}

.about-content li {
    font-size: 13px;
    margin-bottom: 4px;
    color: #666;
}

.about-content a {
    color: #0066cc;
    text-decoration: none;
}

.about-content a:hover {
    text-decoration: underline;
}

/* Tesla 风格 - 质保内容样式 */
/* 移动端默认样式 */
.warranty-content {
    width: 100%;
    max-width: 390px;
    margin: 0 auto;
    padding: 48px 24px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #ffffff;
    color: #1d1d1f;
    line-height: 1.5;
}

/* 平板及以上设备 (768px+) */
@media screen and (min-width: 768px) {
    .warranty-content {
        max-width: 700px;
        padding: 60px 40px;
    }
    
    .warranty-content h2 {
        font-size: 34px;
        margin-bottom: 48px;
        padding-bottom: 28px;
    }
    
    .warranty-content h3 {
        font-size: 20px;
        margin-top: 48px;
        margin-bottom: 20px;
    }
    
    .warranty-content p {
        font-size: 15px;
        margin-bottom: 18px;
    }
    
    .warranty-content .highlight-box {
        padding: 24px;
        margin: 28px 0;
    }
    
    .warranty-content .data-list {
        margin: 28px 0;
    }
    
    .warranty-content .data-item {
        padding: 24px 28px;
    }
    
    .warranty-content .data-value {
        font-size: 15px;
    }
}

/* 桌面端 (1024px+) */
@media screen and (min-width: 1024px) {
    .warranty-content {
        max-width: 900px;
        padding: 72px 40px;
        margin: 0 auto;
    }
    
    .warranty-content h2 {
        font-size: 40px;
        margin-bottom: 56px;
        padding-bottom: 32px;
    }
    
    .warranty-content h3 {
        font-size: 22px;
        margin-top: 56px;
        margin-bottom: 24px;
    }
    
    .warranty-content p {
        font-size: 16px;
        line-height: 1.7;
        margin-bottom: 20px;
    }
    
    .warranty-content .highlight-box {
        padding: 28px 32px;
        margin: 32px 0;
        border-radius: 16px;
    }
    
    .warranty-content .highlight-box p {
        font-size: 16px;
    }
    
    .warranty-content .data-list {
        margin: 32px 0;
        border-radius: 16px;
    }
    
    .warranty-content .data-item {
        padding: 28px 32px;
    }
    
    .warranty-content .data-label {
        font-size: 15px;
    }
    
    .warranty-content .data-value {
        font-size: 16px;
    }
    
    .warranty-content .note {
        font-size: 14px;
        margin-top: 32px;
        padding-top: 32px;
    }
}

/* 大屏幕 (1440px+) */
@media screen and (min-width: 1440px) {
    .warranty-content {
        max-width: 1100px;
        padding: 80px 60px;
    }
    
    .warranty-content h2 {
        font-size: 44px;
    }
    
    .warranty-content h3 {
        font-size: 24px;
    }
    
    .warranty-content p {
        font-size: 17px;
    }
}

/* Tesla 风格标题 */
.warranty-content h2 {
    font-size: 28px;
    font-weight: 500;
    letter-spacing: -0.5px;
    color: #1d1d1f;
    margin-bottom: 40px;
    text-align: left;
    border-bottom: 1px solid #e5e5e5;
    padding-bottom: 24px;
}

/* Tesla 风格章节标题 */
.warranty-content h3 {
    font-size: 17px;
    font-weight: 600;
    color: #1d1d1f;
    margin-top: 40px;
    margin-bottom: 16px;
    letter-spacing: -0.2px;
}

/* Tesla 风格正文 */
.warranty-content p {
    font-size: 14px;
    color: #86868b;
    margin-bottom: 16px;
    line-height: 1.6;
}

/* Tesla 风格高亮卡片 */
.warranty-content .highlight-box {
    background-color: #f5f5f7;
    border-radius: 12px;
    padding: 20px;
    margin: 24px 0;
}

.warranty-content .highlight-box p {
    font-size: 15px;
    color: #1d1d1f;
    font-weight: 500;
    margin-bottom: 0;
    line-height: 1.5;
}

.warranty-content .highlight-box strong {
    color: #e8210d;
    font-weight: 600;
}

/* Tesla 风格数据卡片 */
.warranty-content .data-list {
    margin: 24px 0;
    border: 1px solid #e5e5e5;
    border-radius: 12px;
    overflow: hidden;
}

.warranty-content .data-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background-color: #ffffff;
    border-bottom: 1px solid #e5e5e5;
}

.warranty-content .data-item:last-child {
    border-bottom: none;
}

.warranty-content .data-item:first-child {
    background-color: #f5f5f7;
}

.warranty-content .data-label {
    font-size: 14px;
    color: #1d1d1f;
    font-weight: 500;
}

.warranty-content .data-value {
    font-size: 14px;
    color: #e8210d;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Tesla 风格说明文字 */
.warranty-content .note {
    font-size: 13px;
    color: #86868b;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e5e5e5;
}

/* Tesla 按钮风格（预留） */
.warranty-content .tesla-btn {
    display: inline-block;
    background-color: #007bff;
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    margin-top: 24px;
    transition: background-color 0.3s;
}

.warranty-content .tesla-btn:hover {
    background-color: #0056b3;
}