/* SEO优化静态网站样式 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* 导航栏 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 28px;
    color: #f56565;
    font-weight: 700;
    margin: 0;
}

.nav-subtitle {
    font-size: 14px;
    color: #666;
    margin-left: 12px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #f56565;
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: #f56565;
}

/* 主横幅 */
.hero {
    background: linear-gradient(135deg, #fef7f7 0%, #ffe5e5 100%);
    padding: 80px 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #333;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    color: #666;
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(245, 101, 101, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(245, 101, 101, 0.4);
}

.btn-secondary {
    background: #fff;
    color: #f56565;
    border: 2px solid #f56565;
}

.btn-secondary:hover {
    background: #fef7f7;
}

.hero-image {
    text-align: center;
    animation: fadeIn 1s ease;
}

.qrcode {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.qrcode-tip {
    margin-top: 16px;
    color: #666;
    font-size: 14px;
}

/* 章节标题 */
.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    border-radius: 2px;
}

/* 视频区域 */
.video-section {
    padding: 80px 0;
    background: #fff;
}

.video-wrapper {
    max-width: 900px;
    margin: 0 auto 24px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    background: #000;
}

.promo-video {
    width: 100%;
    height: auto;
    display: block;
    max-height: 600px;
}

.video-description {
    text-align: center;
    color: #666;
    font-size: 16px;
    margin-top: 24px;
}

/* 核心功能区域 */
.features-section {
    padding: 80px 0;
    background: #fef7f7;
}

/* 功能卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: #fff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

.feature-card h3 {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 产品优势 */
.advantages-section {
    background: #fff;
    padding: 80px 0;
}

.advantages-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.advantage-item {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    background: #fff;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.advantage-number {
    font-size: 48px;
    font-weight: 700;
    color: #f56565;
    opacity: 0.3;
    flex-shrink: 0;
    width: 80px;
}

.advantage-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.advantage-content p {
    color: #666;
    line-height: 1.6;
}

/* 使用场景区域 */
.scenarios-section {
    padding: 80px 0;
    background: #fef7f7;
}

/* 使用场景 */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.scenario-card {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe5e5 100%);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid rgba(245, 101, 101, 0.2);
}

.scenario-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: #f56565;
    margin-bottom: 12px;
}

.scenario-card p {
    color: #666;
    line-height: 1.6;
}

/* 下载引导 */
.download-section {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.download-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.download-content > p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.download-qrcode {
    display: inline-block;
    background: #fff;
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.download-qrcode img {
    width: 200px;
    height: 200px;
    display: block;
}

.download-qrcode p {
    margin-top: 16px;
    color: #333;
    font-size: 14px;
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #fef7f7 0%, #ffe5e5 100%);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    color: #333;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    color: #666;
}

/* 功能详情 */
.features-detail {
}

.feature-detail-item {
    display: flex;
    gap: 32px;
    padding: 40px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.feature-detail-icon {
    font-size: 64px;
    flex-shrink: 0;
}

.feature-detail-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin-bottom: 12px;
}

.feature-intro {
    font-size: 18px;
    color: #666;
    margin-bottom: 24px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 12px 0;
    padding-left: 24px;
    position: relative;
    color: #666;
    line-height: 1.6;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #f56565;
    font-weight: 600;
}

/* 使用指南 */
.guide-section {
}

.guide-step {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
    padding: 40px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #f56565;
}

.step-number {
    font-size: 48px;
    font-weight: 700;
    color: #f56565;
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fef7f7;
    border-radius: 50%;
}

.step-content h2 {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 16px;
}

.step-content > p {
    font-size: 16px;
    color: #666;
    margin-bottom: 16px;
    line-height: 1.6;
}

.step-list {
    list-style: none;
    padding-left: 0;
    margin: 16px 0;
}

.step-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: #666;
}

.step-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #f56565;
    font-weight: 600;
    font-size: 20px;
}

.step-tips {
    background: #fef7f7;
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    border-left: 3px solid #f56565;
}

.step-tips strong {
    color: #f56565;
}

/* 常见问题 */
.faq-section {
    margin-top: 60px;
    padding: 40px;
    background: #fef7f7;
    border-radius: 16px;
}

.faq-section h2 {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin-bottom: 32px;
    text-align: center;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.faq-item {
    background: #fff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.faq-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
}

.faq-item p {
    color: #666;
    line-height: 1.6;
}

/* 关于页面 */
.about-section {
    margin-bottom: 60px;
}

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

.about-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin: 48px 0 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f0f0;
}

.about-content h2:first-child {
    margin-top: 0;
}

.about-content p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 16px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.value-item {
    background: #fef7f7;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid rgba(245, 101, 101, 0.2);
}

.value-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: #f56565;
    margin-bottom: 12px;
}

.value-item p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.target-list,
.features-list {
    list-style: none;
    padding-left: 0;
    margin: 24px 0;
}

.target-list li,
.features-list li {
    padding: 12px 0;
    padding-left: 24px;
    position: relative;
    color: #666;
    line-height: 1.8;
}

.target-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #f56565;
    font-weight: 600;
}

.download-cta {
    background: linear-gradient(135deg, #fef7f7 0%, #ffe5e5 100%);
    padding: 48px;
    border-radius: 16px;
    text-align: center;
    margin-top: 48px;
    border: 1px solid rgba(245, 101, 101, 0.2);
}

.download-cta h3 {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
}

.download-cta > p {
    color: #666;
    margin-bottom: 32px;
}

/* 页脚 */
.footer {
    background: #333;
    color: #fff;
    padding: 60px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #fff;
}

.footer-section p {
    color: #ccc;
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid #444;
    color: #999;
}

.footer-bottom p {
    margin: 8px 0;
}

.footer-icp {
    font-size: 14px;
    color: #999;
    margin-top: 12px;
}

.footer-icp a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-icp a:hover {
    color: #ccc;
}

.footer-separator {
    margin: 0 12px;
    color: #666;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 16px;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-actions {
        justify-content: center;
    }

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

    .advantage-item {
        flex-direction: column;
    }

    .advantage-number {
        width: auto;
    }

    .feature-detail-item {
        flex-direction: column;
        text-align: center;
    }

    .guide-step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto;
    }

    .section-title {
        font-size: 28px;
    }

    .container {
        padding: 0 16px;
    }

    .video-section {
        padding: 40px 0;
        margin: 40px 0;
    }

    .video-wrapper {
        margin: 0 auto 16px;
    }

    .promo-video {
        max-height: 400px;
    }

    .video-description {
        font-size: 14px;
        padding: 0 16px;
    }
}