/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', 'Noto Sans SC', 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333333;
    background-color: #ffffff;
}

.container {
    max-width: 1296px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 主要内容 */
.main-content {
    padding: 40px 0;
    min-height: 100vh;
}

.technical-support {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.support-header {
    background: linear-gradient(135deg, #1669d5, #1250a1);
    color: #ffffff;
    padding: 40px;
    text-align: center;
}

.support-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.support-intro {
    font-size: 18px;
    line-height: 1.6;
    opacity: 0.95;
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

.support-content {
    padding: 40px;
}

.support-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 24px;
    font-weight: 600;
    color: #1669d5;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e9ecef;
}

.contact-info {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid #1669d5;
}

.contact-info p {
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    margin-bottom: 10px;
}

.contact-note {
    font-size: 14px;
    color: #666666;
    font-style: italic;
    margin-top: 15px;
}

.contact-link {
    color: #1669d5;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: #1250a1;
    text-decoration: underline;
}

/* FAQ 样式 */
.faq-item {
    margin-bottom: 30px;
    background: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.faq-question {
    font-size: 18px;
    font-weight: 600;
    color: #1669d5;
    background: #f8f9fa;
    padding: 20px 25px;
    margin: 0;
    border-bottom: 1px solid #e9ecef;
}

.faq-answer {
    padding: 25px;
}

.faq-answer p {
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    margin-bottom: 15px;
}

.feature-list {
    margin: 20px 0;
    padding-left: 20px;
}

.feature-list li {
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    margin-bottom: 12px;
    padding-left: 10px;
}

.feature-list li strong {
    color: #1669d5;
    font-weight: 600;
}

.privacy-note {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 15px;
    margin-top: 20px;
    font-size: 14px;
    color: #856404;
    font-weight: 500;
}

.update-info {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    border-top: 3px solid #1669d5;
}

.update-date {
    font-size: 14px;
    color: #666666;
    font-weight: 400;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .support-title {
        font-size: 28px;
    }
    
    .support-intro {
        font-size: 16px;
    }
    
    .support-content {
        padding: 20px;
    }
    
    .support-header {
        padding: 30px 20px;
    }
    
    .section-title {
        font-size: 20px;
    }
    
    .faq-question {
        font-size: 16px;
        padding: 15px 20px;
    }
    
    .faq-answer {
        padding: 20px;
    }
    
    .contact-info {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .support-title {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .faq-question {
        font-size: 15px;
    }
    
    .faq-answer p,
    .feature-list li {
        font-size: 15px;
    }
}