*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;color:#1a1a2e;background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid #eef0f4}
.nav-inner{display:flex;align-items:center;height:64px;gap:32px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:18px}
.logo-icon{font-size:22px}
.logo-text{color:#00C1B0}
.nav-links{display:flex;gap:28px;flex:1}
.nav-links a{color:#4a5568;font-size:15px;padding:6px 0;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:#00C1B0}
.nav-links a.active{font-weight:600}
.btn-download-top{padding:8px 20px;background:#00C1B0;color:#fff;border-radius:20px;font-size:14px;font-weight:600;transition:all .2s}
.btn-download-top:hover{background:#00a896;transform:translateY(-1px)}

.hero{padding:80px 0 100px;background:linear-gradient(135deg,#f0fdfb 0%,#e6f9ff 50%,#f0f4ff 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-200px;right:-200px;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(0,193,176,.15),transparent 70%)}
.hero-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center;position:relative}
.hero h1{font-size:52px;font-weight:800;color:#0f172a;letter-spacing:-1px}
.hero-slogan{font-size:22px;color:#00a896;font-weight:600;margin:12px 0 24px}
.hero-desc{font-size:17px;color:#4a5568;margin-bottom:36px}
.hero-btns{display:flex;gap:16px;margin-bottom:24px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:#00C1B0;color:#fff;border-radius:12px;font-size:16px;font-weight:600;box-shadow:0 8px 24px rgba(0,193,176,.3);transition:all .2s}
.btn-primary:hover{background:#00a896;transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,193,176,.4)}
.btn-primary .ver{font-size:13px;opacity:.85;font-weight:400}
.btn-large{padding:18px 44px;font-size:18px}
.btn-secondary{display:inline-flex;align-items:center;padding:14px 32px;background:#fff;color:#1a1a2e;border:1px solid #e2e8f0;border-radius:12px;font-size:16px;font-weight:600;transition:all .2s}
.btn-secondary:hover{border-color:#00C1B0;color:#00C1B0}
.hero-meta{display:flex;gap:24px;font-size:14px;color:#64748b}

.screenshot{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.12),0 4px 12px rgba(0,0,0,.06);transform:perspective(1000px) rotateY(-5deg) rotateX(2deg)}
.screenshot-bar{height:36px;background:#f7f9fc;display:flex;align-items:center;padding:0 14px;gap:6px;border-bottom:1px solid #eef0f4}
.screenshot-bar .dot{width:11px;height:11px;border-radius:50%}
.dot.red{background:#ff5f57}.dot.yellow{background:#ffbd2e}.dot.green{background:#28c840}
.screenshot-title{margin-left:12px;font-size:12px;color:#94a3b8}
.screenshot-body{padding:20px 24px}
.mock-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid #f1f5f9;font-size:14px;color:#475569}
.mock-row:last-child{border-bottom:none}
.mock-status{color:#00C1B0;font-weight:600}
.mock-path{font-size:12px;color:#94a3b8;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mock-switch{width:40px;height:22px;background:#cbd5e1;border-radius:11px;position:relative}
.mock-switch.on{background:#00C1B0}
.mock-switch::after{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;background:#fff;border-radius:50%;transition:all .3s}
.mock-switch.on::after{left:21px}

.features{padding:100px 0;background:#fff}
.section-title{text-align:center;font-size:36px;font-weight:800;color:#0f172a}
.section-sub{text-align:center;color:#64748b;margin:12px 0 60px;font-size:16px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{padding:36px 28px;border:1px solid #eef0f4;border-radius:16px;transition:all .25s;background:#fff}
.feature-card:hover{border-color:#00C1B0;transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,193,176,.12)}
.feature-icon{font-size:40px;margin-bottom:16px}
.feature-card h3{font-size:19px;color:#0f172a;margin-bottom:10px}
.feature-card p{color:#64748b;font-size:14px;line-height:1.7}

.sources{padding:80px 0;background:#f8fafc}
.source-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:20px}
.source-tags span{padding:8px 18px;background:#fff;border:1px solid #e2e8f0;border-radius:20px;font-size:14px;color:#475569;transition:all .2s}
.source-tags span:hover{border-color:#00C1B0;color:#00C1B0}

.cta{padding:100px 0;background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%);color:#fff;text-align:center}
.cta h2{font-size:40px;font-weight:800;margin-bottom:12px}
.cta p{color:#cbd5e1;font-size:17px;margin-bottom:36px}
.cta .btn-primary{background:#00C1B0}
.cta-hint{color:#94a3b8;font-size:14px;margin-top:20px}

.footer{background:#0f172a;color:#cbd5e1;padding:60px 0 0}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col a{display:block;color:#94a3b8;font-size:14px;padding:6px 0;transition:color .2s}
.footer-col a:hover{color:#00C1B0}
.footer-desc{color:#64748b;font-size:14px;margin-top:12px}
.footer-bottom{border-top:1px solid #1e293b;padding:24px 0;text-align:center;color:#64748b;font-size:13px}

.ai-chat-btn{position:fixed;right:28px;bottom:28px;z-index:999;display:flex;align-items:center;gap:8px;padding:14px 22px;background:linear-gradient(135deg,#00C1B0,#00a896);color:#fff;border-radius:30px;cursor:pointer;box-shadow:0 12px 32px rgba(0,193,176,.4);font-weight:600;font-size:15px;transition:all .25s}
.ai-chat-btn:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,193,176,.55)}
.ai-chat-icon{font-size:20px}
.ai-chat-panel{position:fixed;right:28px;bottom:100px;z-index:1000;width:380px;height:560px;background:#fff;border-radius:16px;box-shadow:0 24px 64px rgba(0,0,0,.18);display:none;flex-direction:column;overflow:hidden}
.ai-chat-panel.open{display:flex;animation:slideUp .3s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.ai-chat-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg,#00C1B0,#00a896);color:#fff}
.ai-chat-header strong{font-size:16px}
.ai-chat-sub{font-size:12px;opacity:.85;margin-top:2px}
.ai-chat-close{background:none;border:none;color:#fff;font-size:26px;cursor:pointer;padding:0 4px;line-height:1}
.ai-chat-messages{flex:1;overflow-y:auto;padding:20px;background:#f8fafc;display:flex;flex-direction:column;gap:12px}
.ai-msg{max-width:85%;padding:12px 16px;border-radius:12px;font-size:14px;line-height:1.6;word-wrap:break-word}
.ai-msg-bot{background:#fff;color:#1a1a2e;border-bottom-left-radius:4px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.ai-msg-user{background:#00C1B0;color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.ai-msg-typing{color:#94a3b8;font-style:italic}
.ai-chat-input{display:flex;padding:12px 16px;border-top:1px solid #eef0f4;gap:8px;background:#fff}
.ai-chat-input input{flex:1;padding:10px 14px;border:1px solid #e2e8f0;border-radius:20px;font-size:14px;outline:none;transition:border .2s}
.ai-chat-input input:focus{border-color:#00C1B0}
.ai-chat-input button{padding:10px 20px;background:#00C1B0;color:#fff;border:none;border-radius:20px;cursor:pointer;font-size:14px;font-weight:600}
.ai-chat-input button:hover{background:#00a896}

@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:38px}
  .feature-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .ai-chat-panel{right:12px;left:12px;width:auto}
  .ai-chat-btn{right:12px}
}