*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',sans-serif;background:#fff;color:#000;-webkit-font-smoothing:antialiased;overflow-x:hidden;min-height:100vh}
.sai-banner{position:fixed;top:0;left:0;right:0;z-index:200;background:rgba(0,0,0,0.7);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,0.1);padding:8px 16px;text-align:center;font-size:11px;color:rgba(255,255,255,0.8);letter-spacing:0.05em}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.animate-fade-in-up{opacity:0;animation:fadeInUp 0.6s ease-out forwards}
.sai-app{max-width:1280px;margin:0 auto;padding-top:36px}
.sai-nav{padding:24px;display:flex;align-items:center;justify-content:space-between}
.sai-logo{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:600}
.sai-star{font-size:22px}
.sai-links{display:none;list-style:none;gap:32px}
@media(min-width:768px){.sai-links{display:flex}}
.sai-links a{color:#374151;text-decoration:none;font-size:14px;cursor:pointer;transition:color .2s}
.sai-links a:hover{color:#000}
.sai-auth{display:flex;align-items:center;gap:16px}
.sai-login{color:#374151;text-decoration:none;font-size:14px}
.sai-start{background:#000;color:#fff;text-decoration:none;font-size:14px;font-weight:500;padding:10px 20px;border-radius:9999px;transition:background .2s}
.sai-start:hover{background:#1f2937}
.sai-hero{padding:64px 24px 96px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:24px}
.sai-rating{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:#000}
.sai-rating-box{width:24px;height:24px;border:1px solid #d1d5db;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;font-size:12px}
.sai-hero h1{font-size:clamp(40px,7vw,80px);font-weight:400;line-height:1.1;letter-spacing:-0.04em;color:#000}
.sai-grad{background:linear-gradient(to right,#000,#6b7280,#9ca3af);-webkit-background-clip:text;background-clip:text;color:transparent}
.sai-hero p{font-size:18px;color:#4b5563;max-width:640px;line-height:1.5}
.sai-cta{display:inline-block;background:#000;color:#fff;text-decoration:none;font-size:15px;font-weight:500;padding:14px 32px;border-radius:9999px;transition:background .2s}
.sai-cta:hover{background:#1f2937}
.sai-tabs{display:inline-flex;background:#f3f4f6;border-radius:12px;padding:4px;flex-wrap:wrap;justify-content:center}
.sai-tab{background:transparent;border:none;color:#6b7280;font-size:14px;font-weight:500;padding:10px 18px;border-radius:8px;cursor:pointer;font-family:inherit;transition:all .2s}
.sai-tab.is-active{background:#fff;color:#000;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.sai-video-wrap{position:relative;width:100%;height:clamp(400px,60vw,500px);border-radius:24px;overflow:hidden;margin-top:16px}
.sai-video-wrap video{width:100%;height:100%;object-fit:cover}
.sai-overlays{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.18)}
.sai-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .4s ease-out}
.sai-overlay.is-active{opacity:1;pointer-events:auto}
.sai-card{background:#fff;color:#000;border-radius:16px;padding:32px;max-width:480px;width:90%;box-shadow:0 8px 30px rgba(0,0,0,0.2);text-align:left}
.sai-card h4{font-size:18px;font-weight:600;margin-bottom:16px}
.sai-progress{height:6px;background:#e5e7eb;border-radius:9999px;overflow:hidden;margin:16px 0}
.sai-progress div{height:100%;border-radius:9999px}
.sai-progress-purple div{background:#a855f7}
.sai-progress-orange div{background:#fbbf24}
.sai-card ol,.sai-card ul{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:14px;color:#374151}
.sai-success{font-size:32px;font-weight:600;color:#16a34a;margin-bottom:8px}
.sai-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:16px}
.sai-metrics div{font-size:24px;font-weight:600;color:#000}
.sai-metrics small{display:block;font-size:11px;color:#6b7280;font-weight:400;margin-top:4px}
.sai-deploy{margin-top:16px;background:#000;color:#fff;border:none;padding:10px 24px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500}
.sai-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:48px;margin-top:48px;font-size:14px;color:#9ca3af}
.sai-logos span{font-weight:500;letter-spacing:0.05em}
.sai-l-italic{font-style:italic;font-family:Georgia,serif}
.sai-l-c{font-size:12px}