* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}
a {
    text-decoration: none;
    color: #333;
}
.header {
    background: #fff;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}
.logo {
    font-size: 20px;
    font-weight: bold;
    color: #0066ff;
}
.nav {
    display: flex;
    gap: 30px;
}
.nav a {
    color: #666;
    transition: color 0.3s;
}
.nav a:hover {
    color: #0066ff;
}
.buy-btn {
    background: #0066ff;
    color: #fff;
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 500;
}
.hero {
    background: #000;
    padding: 30px 0;
    text-align: center;
}
.hero-video {
    max-width: 800px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
}
.hero-video img {
    width: 100%;
    height: auto;
    display: block;
}
.hero-btns {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}
.download-btn {
    background: #28a745;
    color: #fff;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.download-btn:hover {
    background: #218838;
}
.purchase-btn {
    background: #0066ff;
    color: #fff;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.purchase-btn:hover {
    background: #0052cc;
}
.section {
    padding: 60px 20px;
}
.section-container {
    max-width: 1200px;
    margin: 0 auto;
}
.section-title {
    text-align: center;
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #333;
}
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.feature-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}
.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
}
.feature-icon.vision {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.feature-icon.aim {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}
.feature-icon.safe {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}
.feature-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}
.feature-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
}
.screenshots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.screenshot-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.screenshot-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}
.testimonials {
    max-width: 800px;
    margin: 0 auto;
}
.testimonial-item {
    background: #f8f9fa;
    padding: 20px 30px;
    border-radius: 8px;
    margin-bottom: 20px;
    position: relative;
}
.testimonial-item::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 15px;
    font-size: 30px;
    color: #ddd;
}
.testimonial-text {
    color: #666;
    font-size: 15px;
}
.faq-section {
    background: #f8f9fa;
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    padding: 20px 30px;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.faq-question {
    font-weight: bold;
    color: #333;
    margin-bottom: 10px;
}
.faq-answer {
    color: #666;
    font-size: 14px;
}
.cta-section {
    background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
    color: #fff;
    text-align: center;
    padding: 60px 20px;
}
.cta-title {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 15px;
}
.cta-desc {
    margin-bottom: 30px;
    opacity: 0.9;
}
.cta-btn {
    background: #fff;
    color: #0066ff;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    display: inline-block;
    transition: transform 0.3s;
}
.cta-btn:hover {
    transform: scale(1.05);
}
.recommend-section {
    background: #fff;
}
.recommend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}
.recommend-item {
    background: #f8f9fa;
    padding: 15px 20px;
    border-radius: 8px;
    transition: background 0.3s;
}
.recommend-item:hover {
    background: #eee;
}
.recommend-url {
    font-size: 12px;
    color: #999;
    margin-bottom: 5px;
}
.recommend-link {
    color: #0066ff;
    font-size: 14px;
    display: block;
}
.recommend-link:hover {
    text-decoration: underline;
}
.footer {
    background: #1a1a2e;
    color: #888;
    text-align: center;
    padding: 30px 20px;
    font-size: 14px;
}
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    .hero-video {
        width: 100%;
    }
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
    .features {
        grid-template-columns: 1fr;
    }
    .screenshots {
        grid-template-columns: 1fr;
    }
}