*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:'Microsoft YaHei','SimHei',Arial,sans-serif;background:#f5f5f5;color:#333;line-height:1.6;min-height:100vh;padding-bottom:80px;}

.top-nav{background:#1a1a2e;padding:12px 0;position:sticky;top:0;z-index:200;}
.nav-container{max-width:1200px;margin:0 auto;padding:0 16px;display:flex;justify-content:space-between;align-items:center;}
.nav-left{display:flex;align-items:center;gap:10px;}
.nav-logo{font-size:20px;font-weight:900;color:#ff6b35;text-decoration:none;}
.nav-slogan{font-size:12px;color:#888;}
.nav-right{display:none;}
.nav-link{color:#ccc;font-size:14px;margin-left:20px;text-decoration:none;}
.nav-link:hover{color:#ff6b35;}
.nav-link.download{background:#ff6b35;color:#fff;padding:6px 16px;border-radius:4px;font-weight:600;}

.hero-section{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);padding:40px 0;}
.hero-container{max-width:1200px;margin:0 auto;padding:0 16px;display:flex;flex-direction:column;align-items:center;gap:24px;}
.hero-left{text-align:center;width:100%;}
.safety-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(76,175,80,0.2);color:#4caf50;padding:6px 14px;border-radius:20px;margin-bottom:16px;font-size:13px;font-weight:600;}
.hero-left h1{font-size:24px;font-weight:900;color:#fff;margin-bottom:12px;white-space:nowrap;}
.hero-meta{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:12px;font-size:13px;color:#aaa;}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:20px;}
.hero-tags .tag{font-size:11px;color:#ff6b35;background:rgba(255,107,53,0.15);padding:4px 10px;border-radius:4px;border:1px solid rgba(255,107,53,0.3);}
.hero-download{display:flex;flex-direction:column;gap:10px;width:100%;max-width:320px;margin:0 auto;}
.download-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 24px;border-radius:8px;text-decoration:none;font-size:15px;font-weight:700;border:none;}
.download-btn.primary{background:linear-gradient(135deg,#ff6b35 0%,#ff8c42 100%);color:#fff;}
.download-btn.secondary{background:rgba(255,255,255,0.1);color:#fff;border:1px solid rgba(255,255,255,0.3);}
.download-btn.large{padding:18px 32px;font-size:17px;}
.hero-right{width:100%;max-width:160px;}
.hero-cover{width:100%;border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,0.3);}

.section-container{max-width:1200px;margin:0 auto;padding:0 16px;}
.section-header{text-align:center;margin-bottom:24px;}
.section-header h2{font-size:24px;font-weight:800;color:#333;margin-bottom:8px;}
.section-desc{font-size:14px;color:#666;}

.features-section{background:#fff;padding:48px 0;margin-top:2px;}
.features-grid{display:flex;flex-direction:column;gap:16px;}
.feature-card{background:#f8f9fa;padding:20px;border-radius:10px;border-left:4px solid #ff6b35;}
.feature-card h3{font-size:15px;font-weight:700;color:#333;margin-bottom:8px;}
.feature-card p{font-size:13px;color:#666;line-height:1.8;text-indent:2em;}

.screenshots-section{background:#f5f5f5;padding:48px 0;}
.screenshots-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;}
.screenshot-item{border-radius:8px;overflow:hidden;border:2px solid #fff;box-shadow:0 4px 12px rgba(0,0,0,0.08);}
.screenshot-item img{width:100%;height:auto;display:block;}

.intro-section{background:#fff;padding:48px 0;}
.intro-text{font-size:14px;color:#666;line-height:1.8;text-indent:2em;margin-bottom:24px;}
.highlight-list{display:flex;flex-direction:column;gap:16px;}
.highlight-item{display:flex;gap:16px;align-items:flex-start;padding:16px;background:#f8f9fa;border-radius:10px;}
.highlight-num{font-size:28px;font-weight:900;color:#ff6b35;line-height:1;flex-shrink:0;}
.highlight-content h3{font-size:15px;font-weight:700;color:#333;margin-bottom:4px;}
.highlight-content p{font-size:13px;color:#666;line-height:1.6;}

.guide-section{background:#f5f5f5;padding:48px 0;}
.guide-content{background:#fff;border-radius:10px;padding:24px;}
.guide-content h3{font-size:15px;font-weight:700;color:#333;margin:16px 0 8px;}
.guide-content h3:first-child{margin-top:0;}
.guide-content p{font-size:13px;color:#666;line-height:1.8;text-indent:2em;}

.download-section{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);padding:48px 0;text-align:center;}
.download-section h2{font-size:26px;font-weight:800;color:#fff;margin-bottom:8px;}
.download-desc{font-size:14px;color:#ff6b35;margin-bottom:24px;font-weight:600;}
.download-buttons{display:flex;flex-direction:column;gap:12px;width:100%;max-width:400px;margin:0 auto 20px;}
.download-info{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;font-size:13px;color:#888;}

.footer{background:#333;color:#999;padding:30px 0;}
.footer-container{display:none;}
.footer-bottom{text-align:center;padding-top:10px;}
.footer-bottom .copyright{font-size:12px;margin-bottom:4px;}
.footer-bottom .disclaimer{font-size:10px;}

.bottom-bar{position:fixed;bottom:0;left:0;width:100%;background:#fff;border-top:1px solid #eee;padding:10px 16px;z-index:100;box-shadow:0 -2px 10px rgba(0,0,0,0.05);}
.bottom-btn{display:flex;align-items:center;justify-content:center;gap:6px;background:linear-gradient(135deg,#ff6b35 0%,#ff8c42 100%);color:#fff;padding:12px 20px;border-radius:6px;text-decoration:none;font-size:15px;font-weight:700;border:none;width:100%;}

@media(min-width:768px){
    .hero-container{gap:32px;}
    .hero-left h1{font-size:30px;}
    .hero-download{flex-direction:row;max-width:420px;}
    .download-btn{flex:1;}
    .hero-right{max-width:220px;}
    .hero-cover{border-radius:12px;}
    .features-grid{grid-template-columns:repeat(2,1fr);}
    .screenshots-grid{grid-template-columns:repeat(3,1fr);}
    .download-buttons{flex-direction:row;max-width:500px;}
}

@media(min-width:1024px){
    .nav-right{display:flex;}
    .hero-container{flex-direction:row-reverse;align-items:flex-start;gap:48px;}
    .hero-left{text-align:left;width:auto;flex:1;}
    .hero-left h1{font-size:36px;margin-bottom:16px;}
    .hero-meta{justify-content:flex-start;gap:20px;}
    .hero-tags{justify-content:flex-start;margin-bottom:24px;}
    .hero-download{margin:0;}
    .hero-right{flex-shrink:0;width:auto;}
    .hero-cover{width:300px;height:300px;object-fit:cover;border-radius:16px;}
    .features-grid{grid-template-columns:repeat(4,1fr);gap:20px;}
    .screenshots-grid{grid-template-columns:repeat(5,1fr);gap:12px;}
    .highlight-list{grid-template-columns:repeat(2,1fr);}
    .download-buttons{max-width:560px;}
    .footer-container{display:flex;justify-content:space-around;max-width:1200px;margin:0 auto;padding:0 32px;border-bottom:1px solid #444;}
    .footer-col{width:25%;}
    .footer-col h4{font-size:14px;color:#fff;margin-bottom:12px;}
    .footer-col ul{list-style:none;padding:0;}
    .footer-col li{margin-bottom:8px;}
    .footer-col a{color:#999;font-size:13px;text-decoration:none;}
    .footer-col a:hover{color:#ff6b35;}
    .footer-bottom{max-width:1200px;margin:0 auto;padding:16px 32px;}
}