:root{--primary:#2563eb;--primary-hover:#1d4ed8;--secondary:#4f46e5;--background:#f8fafc;--surface:#fff;--text:#0f172a;--text-light:#64748b;--border:#e2e8f0;--shadow:0 10px 40px #0f172a14;--shadow-hover:0 20px 60px #2563eb26;--radius:20px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--text);background:radial-gradient(circle at top,#eef4ff 0%,#fff 65%);font-family:Inter,Arial,Helvetica,sans-serif}main{max-width:1200px;margin:0 auto;padding:0 24px}.container{width:min(1200px,92%);margin:auto}.navbar{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);z-index:999;background:#fffc;border-bottom:1px solid #e2e8f0b3;justify-content:space-between;align-items:center;padding:24px 0;display:flex;position:sticky;top:0}.logo{margin-left:16px;font-size:30px;font-weight:800}.nav-links{gap:32px;display:flex}.nav-links a{color:var(--text-light);text-decoration:none;transition:all .2s}.nav-links a:hover{color:var(--primary)}.hero{text-align:center;padding:110px 20px}.hero span{background:linear-gradient(90deg, var(--primary), var(--secondary));color:#0000;-webkit-background-clip:text}.hero p{color:var(--text-light);margin-top:24px;max-width:720px;margin-inline:auto;font-size:22px}.upload-box{border-radius:var(--radius);border:2px dashed var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);max-width:760px;box-shadow:var(--shadow);cursor:pointer;background:#ffffffe6;margin:60px auto;padding:70px;transition:all .25s}.upload-box:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}.upload-box.dragging{border-color:var(--primary);background:#eff6ff}.upload-icon{margin-bottom:20px;font-size:70px}.upload-box h3{margin-bottom:10px;font-size:30px}.upload-box p{color:var(--text-light);margin-bottom:25px}.upload-box small{color:var(--text-light);margin-top:20px;display:block}.btn{background:linear-gradient(90deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:14px;padding:16px 34px;font-size:17px;font-weight:600;transition:all .2s}.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px #2563eb59}.btn:disabled{opacity:.6;cursor:not-allowed;box-shadow:none;transform:none}.features{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px;margin:120px auto;padding:16px;display:grid}.feature-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px;transition:all .25s}.feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-8px)}.icon{margin-bottom:18px;font-size:42px}.feature-card h3{margin-bottom:14px}.feature-card p{color:var(--text-light);line-height:1.6}.comparison{text-align:center;margin:120px auto}.compare-card{flex-wrap:wrap;justify-content:center;align-items:center;gap:40px;margin-top:50px;display:flex}.compare-card>div{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;min-width:220px;padding:40px}.compare-card strong{margin-top:15px;font-size:34px;display:block}.arrow{color:var(--primary);font-size:42px}.trust{color:var(--text-light);margin-top:30px}.seo{text-align:center;max-width:850px;margin:140px auto}.seo h2{margin-bottom:30px;font-size:42px}.seo p{color:var(--text-light);margin-bottom:20px;line-height:1.8}footer{text-align:center;color:var(--text-light);border-top:1px solid var(--border);margin-top:120px;padding:60px}@media (width<=768px){.hero h1{font-size:46px}.hero p{font-size:18px}.upload-box{padding:40px 25px}.compare-card{flex-direction:column}.arrow{transform:rotate(90deg)}.nav-links{display:none}}.btn{cursor:pointer;letter-spacing:.2px;color:#fff;background:linear-gradient(135deg,#3b82f6 0%,#2563eb 45%,#4f46e5 100%);border:none;border-radius:16px;justify-content:center;align-items:center;gap:10px;padding:16px 34px;font-size:16px;font-weight:600;transition:transform .2s,box-shadow .2s,filter .2s;display:inline-flex;box-shadow:0 8px 20px #2563eb59,inset 0 1px #ffffff40}.btn:hover{filter:brightness(1.05);transform:translateY(-2px)scale(1.02);box-shadow:0 16px 35px #2563eb73,inset 0 1px #ffffff4d}.btn:active{transform:translateY(1px)scale(.99);box-shadow:0 6px 15px #2563eb40}.btn:disabled{opacity:.6;cursor:not-allowed;filter:none;box-shadow:none;transform:none}.action-card,.success-card{text-align:center;background:#fff;border-radius:24px;max-width:600px;margin:40px auto;padding:35px;box-shadow:0 20px 50px #00000014}.action-card h2,.success-card h2{margin-bottom:20px}.size-info{background:#f8fafc;border-radius:16px;justify-content:space-between;margin-bottom:25px;padding:20px;display:flex}.size-info strong{color:#2563eb}.btn-large{width:100%;padding:18px}.success-icon{font-size:64px}.comparison-small{gap:20px;margin:30px 0;display:flex}.comparison-small div{background:#f8fafc;border-radius:16px;flex:1;padding:20px}.comparison-small strong{margin-top:8px;font-size:24px;display:block}.hero h1{letter-spacing:-1px;max-width:750px;margin:auto;font-size:clamp(36px,4vw,52px);font-weight:800;line-height:1.15}