:root{--primary-color: #6366f1;--primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);--primary-glow: rgba(99, 102, 241, .15);--bg-dark: #ffffff;--bg-card: #f8fafc;--text-main: #1e293b;--text-muted: #64748b;--glass-border: rgba(99, 102, 241, .1);--font-family: "Outfit", "Inter", system-ui, sans-serif;--card-shadow: 0 10px 25px -5px rgba(99, 102, 241, .1), 0 8px 10px -6px rgba(99, 102, 241, .1)}*{margin:0;padding:0;box-sizing:border-box}body{background-color:var(--bg-dark);color:var(--text-main);font-family:var(--font-family);line-height:1.6;overflow-x:hidden}.glass{background:#fff;border:1px solid var(--glass-border);border-radius:20px;box-shadow:var(--card-shadow);transition:all .4s cubic-bezier(.4,0,.2,1)}.glass:hover{transform:translateY(-10px);box-shadow:0 20px 25px -5px #6366f133}nav{position:absolute;top:0;width:100%;padding:1.5rem 8%;display:flex;justify-content:space-between;align-items:center;z-index:1000;background:linear-gradient(to bottom,#0009,#0000);border-bottom:1px solid rgba(255,255,255,.05)}.logo{font-size:1.6rem;font-weight:900;color:#fff;display:flex;align-items:center;gap:.6rem;letter-spacing:-.01em}.nav-links{display:flex;gap:2.5rem}.nav-links a{color:#ffffffd9;text-decoration:none;font-weight:500;font-size:.95rem;transition:all .3s ease}.nav-links a:hover{color:#fff;text-shadow:0 0 10px rgba(99,102,241,.5)}.btn-download{background:var(--primary-gradient);color:#fff;padding:.7rem 1.8rem;border-radius:8px;text-decoration:none;font-weight:600;transition:all .3s ease;box-shadow:0 4px 15px #6366f14d}.btn-download:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f166}.hero{height:100vh;display:flex;align-items:center;justify-content:center;padding:0 10%;position:relative;overflow:hidden;background:#000;color:#fff;text-align:center}.hero-video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at center,#0003,#000000b3);z-index:1}.hero:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:150px;background:linear-gradient(to top,var(--bg-dark) 0%,transparent 100%);z-index:2}.hero-content{position:relative;z-index:10;max-width:900px;width:100%}.hero-content h1{text-shadow:0 4px 20px rgba(0,0,0,.5)}.hero-visual{display:none}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-15px)}}h1{font-size:4.5rem;line-height:1.05;margin-bottom:2rem;font-weight:900;color:var(--text-main);letter-spacing:-.02em}.gradient-text{background:var(--primary-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-gradient-text{background:linear-gradient(135deg,#c7d2fe,#f0abfc);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline-block;filter:drop-shadow(0 2px 10px rgba(0,0,0,.4))}.hero p{font-size:1.25rem;color:#ffffffe6;max-width:700px;margin-left:auto;margin-right:auto;margin-bottom:2.5rem;text-shadow:0 2px 10px rgba(0,0,0,.5)}.bg-glow{position:absolute;width:600px;height:600px;background:radial-gradient(circle,var(--primary-glow) 0%,transparent 70%);top:-200px;right:-200px;filter:blur(80px);opacity:.4;pointer-events:none}section{padding:100px 10%}section:nth-of-type(2n){background-color:var(--bg-card)}.section-title{text-align:center;font-size:2.8rem;margin-bottom:4rem;font-weight:800}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.feature-card{padding:3rem 2rem;background:#fff;transition:transform .3s ease}.feature-card:hover{transform:translateY(-10px)}.feature-icon{width:60px;height:60px;background:var(--bg-card);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--primary-color);margin-bottom:1.5rem}.feature-card h3{margin-bottom:1rem}.feature-card p{color:var(--text-muted)}#tutorials .glass{background:#fff;border:none}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:3rem}.pricing-card{padding:3.5rem 2rem;text-align:center;position:relative;background:#fff;transition:transform .3s ease,border-color .3s ease}.pricing-card.popular{border:2.5px solid transparent;background-image:linear-gradient(#fff,#fff),var(--primary-gradient);background-origin:border-box;background-clip:padding-box,border-box;transform:scale(1.05)}.pricing-card.popular:before{content:"推荐方案";position:absolute;top:-15px;left:50%;transform:translate(-50%);background:var(--primary-gradient);color:#fff;padding:.3rem 1.5rem;border-radius:30px;font-size:.8rem;font-weight:800;box-shadow:0 4px 12px #6366f14d}.price{font-size:3.5rem;font-weight:900;margin:1.5rem 0;background:var(--primary-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.price span{font-size:1rem;color:var(--text-muted)}.features-list{list-style:none;margin:2rem 0;text-align:left}.features-list li{margin-bottom:1rem;display:flex;align-items:center;gap:.8rem;color:var(--text-muted)}.features-list li i{color:var(--primary-color);font-size:1rem}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:2000;opacity:0;pointer-events:none;transition:opacity .3s ease}.modal-overlay.active{opacity:1;pointer-events:auto}.modal-content{width:100%;max-width:420px;padding:3.5rem;background:#fff;border-radius:16px;position:relative}.modal-close{position:absolute;top:1.5rem;right:1.5rem;cursor:pointer;color:var(--text-muted);transition:color .3s ease}.modal-close:hover{color:#fff}.auth-form h2{margin-bottom:2rem;text-align:center}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.6rem;font-size:.9rem;font-weight:600;color:var(--text-muted)}.form-group input{width:100%;padding:.9rem 1rem;background:#f8f9fa;border:1px solid #dee2e6;border-radius:8px;color:var(--text-main);outline:none;transition:border-color .3s ease}.form-group input:focus{border-color:var(--primary-color)}.auth-btn{width:100%;padding:1rem;background:var(--primary-color);color:#fff;border:none;border-radius:8px;font-weight:700;cursor:pointer;margin-top:1rem;transition:opacity .3s ease}.auth-btn:hover{opacity:.9}.auth-switch{margin-top:1.5rem;text-align:center;font-size:.9rem;color:var(--text-muted)}.auth-switch span{color:var(--primary-color);cursor:pointer;font-weight:600}footer{background-color:#090a0a;color:#fff;padding:80px 10%}footer h2,footer p{color:#fff}footer .gradient-text{color:var(--primary-color)}@media(max-width:1024px){h1{font-size:3rem}.hero{flex-direction:column;text-align:center;padding-top:140px}.hero-visual img{max-width:90%}.nav-links{display:none}.pricing-card.popular{transform:scale(1)}section{padding:60px 8%}}