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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

a {
    color: #5C84FF;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #4169E1;
}

/* 头部 */
.header {
    background: linear-gradient(135deg, #5C84FF 0%, #64B3FF 100%);
    color: white;
    padding: 40px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.logo h1 {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 8px;
}

.tagline {
    font-size: 16px;
    opacity: 0.9;
}

/* 主要内容 */
.main {
    padding: 40px 0;
}

.section {
    background: white;
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-size: 28px;
    font-weight: bold;
    color: #1a1a1a;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #5C84FF;
}

/* 联系我们 */
.contact-info {
    margin-top: 20px;
}

.company-info {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid #5C84FF;
}

.company-info h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 20px;
    font-weight: 600;
}

.info-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    font-size: 16px;
    line-height: 1.6;
}

.info-item .icon {
    font-size: 20px;
    margin-right: 12px;
    min-width: 24px;
}

.info-item .text {
    color: #333;
}

.info-item a {
    color: #5C84FF;
    font-weight: 500;
}

.info-item a:hover {
    color: #4169E1;
    text-decoration: underline;
}

/* 应用介绍 */
.intro-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 25px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: background 0.3s;
}

.feature-item:hover {
    background: #e9ecef;
}

.feature-icon {
    font-size: 24px;
    margin-right: 12px;
}

.feature-item span:last-child {
    font-size: 15px;
    color: #333;
}

/* 常见问题 */
.faq-list {
    margin-top: 20px;
}

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e9ecef;
}

.faq-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.faq-question {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 15px;
    font-weight: 600;
}

.faq-answer {
    color: #555;
    line-height: 1.8;
}

.faq-answer p {
    margin-bottom: 10px;
}

.faq-answer ol,
.faq-answer ul {
    margin-left: 25px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.faq-answer li {
    margin-bottom: 8px;
}

.note {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 12px 15px;
    margin-top: 15px;
    border-radius: 4px;
    font-size: 14px;
    color: #856404;
}

/* 系统要求 */
.requirements-content {
    display: grid;
    gap: 15px;
}

.requirement-item {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 6px;
    font-size: 15px;
}

.requirement-item strong {
    color: #5C84FF;
    margin-right: 10px;
}

/* 隐私与安全 */
.privacy-content p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.privacy-content ul {
    margin-left: 25px;
    margin-bottom: 15px;
}

.privacy-content li {
    margin-bottom: 10px;
}

/* 意见反馈 */
.feedback-content p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.contact-detail {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    margin: 20px 0;
}

.contact-detail p {
    margin: 8px 0;
    font-size: 15px;
    line-height: 1.8;
}

.contact-detail strong {
    color: #1a1a1a;
    font-size: 18px;
}

.contact-detail a {
    color: #5C84FF;
    font-weight: 500;
}

.contact-detail a:hover {
    text-decoration: underline;
}

.highlight {
    background: #fff3cd;
    border-left: 4px solid #ff6b6b;
    padding: 15px;
    margin-top: 20px;
    border-radius: 4px;
    font-weight: 600;
    color: #c92a2a;
    font-size: 16px;
}

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

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: white;
    margin: 0 5px;
}

.footer-links a:hover {
    color: #64B3FF;
}

.separator {
    color: #7f8c8d;
    margin: 0 10px;
}

.copyright,
.company {
    color: #bdc3c7;
    font-size: 14px;
    margin: 5px 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 30px 0;
    }

    .logo h1 {
        font-size: 24px;
    }

    .tagline {
        font-size: 14px;
    }

    .section {
        padding: 25px 20px;
    }

    .section-title {
        font-size: 22px;
    }

    .company-info {
        padding: 20px;
    }

    .company-info h3 {
        font-size: 18px;
    }

    .info-item {
        font-size: 14px;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .faq-question {
        font-size: 18px;
    }

    .contact-detail {
        padding: 20px;
    }

    .footer {
        padding: 30px 0;
    }

    .footer-links {
        flex-direction: column;
    }

    .separator {
        display: none;
    }

    .footer-links a {
        display: block;
        margin: 10px 0;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 20px;
    }

    .section {
        padding: 20px 15px;
    }

    .section-title {
        font-size: 20px;
    }

    .company-info {
        padding: 15px;
    }

    .company-info h3 {
        font-size: 16px;
    }

    .info-item {
        font-size: 13px;
        flex-wrap: wrap;
    }

    .contact-detail {
        padding: 15px;
    }
}