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

body {
    font-family: "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #1E293B;
    background-color: #FFFFFF;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: #F97316;
    color: #FFFFFF;
}

.btn-primary:hover {
    background-color: #EA580C;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #2563EB;
    border: 2px solid #2563EB;
}

.btn-secondary:hover {
    background-color: #2563EB;
    color: #FFFFFF;
}

.btn-download {
    background-color: #2563EB;
    color: #FFFFFF;
    padding: 10px 24px;
}

.btn-download:hover {
    background-color: #1D4ED8;
}

.btn-large {
    padding: 16px 48px;
    font-size: 18px;
}

.btn-download-header {
    background-color: #F97316;
    color: #FFFFFF;
    padding: 8px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-download-header:hover {
    background-color: #EA580C;
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #2563EB;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: #475569;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #2563EB;
}

/* Hero区域 */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
    text-align: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 20px;
    color: #475569;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
}

.hero-trust {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 30px;
}

.trust-badge {
    background-color: #DBEAFE;
    color: #1E40AF;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.platform-icons {
    display: flex;
    gap: 24px;
    justify-content: center;
}

.platform-icon {
    background-color: #F1F5F9;
    color: #475569;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
}

/* 通用区块样式 */
.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    color: #1E293B;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: #475569;
    margin-bottom: 50px;
}

/* 功能展示区 */
.features {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

/* 下载区域 */
.download-section {
    padding: 80px 0;
    background-color: #F8FAFC;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.download-card {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.download-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.download-title {
    font-size: 20px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 8px;
}

.download-version {
    font-size: 14px;
    color: #64748B;
    margin-bottom: 20px;
}

/* 截图展示区 */
.screenshots {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.screenshot-item {
    text-align: center;
}

.screenshot-placeholder {
    background: linear-gradient(135deg, #DBEAFE 0%, #E0E7FF 100%);
    border-radius: 12px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1E40AF;
    font-size: 16px;
    font-weight: 500;
}

.screenshot-caption {
    margin-top: 12px;
    font-size: 14px;
    color: #475569;
}

/* 用户评价区 */
.testimonials {
    padding: 80px 0;
    background-color: #F8FAFC;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: #2563EB;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: #475569;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-size: 15px;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.author-name {
    font-weight: 600;
    color: #1E293B;
}

.author-title {
    font-size: 13px;
    color: #64748B;
}

/* FAQ区域 */
.faq {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: #F8FAFC;
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-question {
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: #1E293B;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: "+";
    font-size: 20px;
    color: #2563EB;
    transition: transform 0.3s ease;
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
    font-size: 14px;
    color: #475569;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background-color: #1E293B;
    color: #CBD5E1;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo-text {
    color: #FFFFFF;
}

.footer-slogan {
    margin-top: 12px;
    font-size: 14px;
    color: #94A3B8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: 16px;
}

.footer-link {
    display: block;
    color: #94A3B8;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #FFFFFF;
}

.footer-notice {
    font-size: 13px;
    color: #94A3B8;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: #64748B;
}

/* 页面标题区域 */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
    text-align: center;
}

.page-title {
    font-size: 42px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 18px;
    color: #475569;
}

/* 产品功能详情页 */
.features-detail {
    padding: 80px 0;
}

.feature-detail-item {
    margin-bottom: 80px;
    padding-bottom: 80px;
    border-bottom: 1px solid #E2E8F0;
}

.feature-detail-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.feature-detail-content {
    max-width: 800px;
    margin: 0 auto;
}

.feature-detail-icon {
    font-size: 64px;
    text-align: center;
    margin-bottom: 24px;
}

.feature-detail-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    color: #1E293B;
    margin-bottom: 20px;
}

.feature-detail-desc {
    font-size: 16px;
    color: #475569;
    line-height: 1.8;
    text-align: center;
    margin-bottom: 30px;
}

.feature-detail-list {
    list-style: none;
    max-width: 600px;
    margin: 0 auto;
}

.feature-detail-list li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    font-size: 15px;
    color: #475569;
}

.feature-detail-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2563EB;
    font-weight: 700;
}

/* CTA区域 */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    text-align: center;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 18px;
    color: #DBEAFE;
    margin-bottom: 40px;
}

/* 下载页面 */
.download-page {
    padding: 80px 0;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.download-card-large {
    background-color: #F8FAFC;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.download-card-large:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.download-card-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.download-card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 12px;
}

.download-card-version {
    font-size: 14px;
    color: #2563EB;
    font-weight: 600;
    margin-bottom: 8px;
}

.download-card-size {
    font-size: 13px;
    color: #64748B;
    margin-bottom: 20px;
}

.download-card-requirements {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
}

.download-card-requirements li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    font-size: 14px;
    color: #475569;
}

.download-card-requirements li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #2563EB;
}

/* 安装指南 */
.install-guide {
    background-color: #F8FAFC;
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
}

.install-guide-title {
    font-size: 28px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 30px;
    text-align: center;
}

.install-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.install-step {
    display: flex;
    gap: 16px;
}

.step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background-color: #2563EB;
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.step-content h3 {
    font-size: 16px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

/* 安全提醒 */
.security-notice {
    background-color: #FEF3C7;
    border: 1px solid #FCD34D;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
}

.security-notice h3 {
    font-size: 18px;
    font-weight: 600;
    color: #92400E;
    margin-bottom: 12px;
}

.security-notice p {
    font-size: 14px;
    color: #78350F;
    line-height: 1.6;
}

/* 帮助中心 */
.help-content {
    padding: 80px 0;
}

.help-section {
    margin-bottom: 60px;
}

.help-section-title {
    font-size: 28px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 12px;
}

.help-section-desc {
    font-size: 16px;
    color: #475569;
    margin-bottom: 30px;
}

.help-guide {
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 24px;
}

.guide-title {
    font-size: 18px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 20px;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.guide-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.guide-step .step-number {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background-color: #2563EB;
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.guide-step p {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
    padding-top: 4px;
}

/* 关于我们页面 */
.about-content {
    padding: 80px 0;
}

.about-section {
    margin-bottom: 60px;
}

.about-section-title {
    font-size: 28px;
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 24px;
}

.about-text {
    max-width: 800px;
}

.about-text p {
    font-size: 16px;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 16px;
}

/* 核心价值观 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.value-card {
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
}

.value-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.value-title {
    font-size: 20px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 12px;
}

.value-desc {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #E2E8F0;
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    flex-shrink: 0;
    width: 80px;
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    color: #2563EB;
    padding-top: 8px;
}

.timeline-content {
    flex: 1;
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 20px;
    margin: 0 30px;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

/* 数据统计 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 30px;
}

.stat-card {
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
}

.stat-card .stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: #2563EB;
    margin-bottom: 8px;
}

.stat-card .stat-label {
    font-size: 14px;
    color: #475569;
}

/* 联系信息 */
.contact-info {
    max-width: 600px;
}

.contact-info p {
    font-size: 16px;
    color: #475569;
    margin-bottom: 16px;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    padding: 10px 0;
    padding-left: 24px;
    position: relative;
    font-size: 15px;
    color: #475569;
}

.contact-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #2563EB;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
        height: auto;
        padding: 15px 20px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 16px;
        margin-top: 10px;
        flex-wrap: wrap;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .page-title {
        font-size: 32px;
    }
    
    .timeline::before {
        left: 40px;
    }
    
    .timeline-item {
        flex-direction: row !important;
    }
    
    .timeline-year {
        width: 80px;
    }
    
    .timeline-content {
        margin: 0 0 0 20px;
    }
}