:root{--bg:#1b1340;--bg2:#0f0a29;--purple:#6d4aff;--purple2:#8a72ff;--pink:#e94ac2;--text:#eae7f5;--muted:#a8a3c4;--card:#241a52;--border:#3a2f6b}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;background:var(--bg2);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(15,10,41,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:1280px;margin:0 auto;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px}
.logo-mark{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--purple),var(--pink));display:inline-block}
.nav-links{display:flex;gap:28px;flex:1;justify-content:center}
.nav-links a{font-size:15px;color:var(--text);opacity:.85;transition:opacity .2s}
.nav-links a:hover{opacity:1;color:var(--purple2)}
.nav-cta{display:flex;gap:12px;align-items:center}
.lang-switch{font-size:14px;color:var(--muted);padding:6px 10px;border-radius:6px;border:1px solid var(--border)}
.btn{display:inline-block;padding:12px 24px;border-radius:8px;font-weight:600;font-size:15px;transition:all .2s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,var(--purple),var(--pink));color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(109,74,255,.4)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--purple2)}

/* hero */
.hero{padding:80px 0 100px;background:radial-gradient(ellipse at top,var(--bg) 0%,var(--bg2) 70%);position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}
.hero h1{font-size:56px;line-height:1.1;font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 .accent{background:linear-gradient(135deg,var(--purple2),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:19px;color:var(--muted);margin-bottom:32px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-img{border-radius:20px;overflow:hidden;box-shadow:0 30px 80px rgba(109,74,255,.35)}

/* sections */
section.block{padding:80px 0}
.section-title{font-size:40px;font-weight:800;letter-spacing:-.02em;text-align:center;margin-bottom:16px}
.section-sub{text-align:center;color:var(--muted);font-size:17px;max-width:640px;margin:0 auto 56px}

/* feature grid */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:var(--purple2)}
.card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--purple),var(--pink));display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:20px;color:#fff;font-weight:700}
.card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:36px;display:flex;flex-direction:column}
.price.featured{border-color:var(--purple);position:relative;box-shadow:0 20px 60px rgba(109,74,255,.25)}
.price .tag{position:absolute;top:-12px;right:24px;background:linear-gradient(135deg,var(--purple),var(--pink));color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:20px}
.price h3{font-size:22px;margin-bottom:8px}
.price .amt{font-size:44px;font-weight:800;margin:12px 0}
.price .amt small{font-size:16px;color:var(--muted);font-weight:500}
.price ul{list-style:none;margin:24px 0;flex:1}
.price ul li{padding:8px 0;color:var(--muted);font-size:15px;padding-left:24px;position:relative}
.price ul li::before{content:"✓";position:absolute;left:0;color:var(--purple2);font-weight:700}

/* download */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px;text-align:center}
.dl h4{margin:12px 0 6px;font-size:18px}
.dl p{color:var(--muted);font-size:14px;margin-bottom:16px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat h3{font-size:44px;background:linear-gradient(135deg,var(--purple2),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
.stat p{color:var(--muted)}

/* cta band */
.cta-band{background:linear-gradient(135deg,var(--purple) 0%,#4b2eb5 60%,var(--pink) 100%);border-radius:24px;padding:60px 40px;text-align:center;margin:40px 0}
.cta-band h2{font-size:36px;font-weight:800;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.85);margin-bottom:24px;font-size:17px}
.cta-band .btn-primary{background:#fff;color:var(--purple)}

/* generic prose */
.prose{max-width:820px;margin:0 auto;padding:60px 24px}
.prose h1{font-size:44px;font-weight:800;letter-spacing:-.02em;margin-bottom:16px}
.prose .subtitle{color:var(--muted);font-size:18px;margin-bottom:40px}
.prose h2{font-size:26px;font-weight:700;margin:36px 0 12px}
.prose h3{font-size:20px;font-weight:700;margin:24px 0 8px}
.prose p,.prose li{color:#cfcbe6;font-size:16px;margin-bottom:12px}
.prose ul,.prose ol{padding-left:24px;margin-bottom:16px}

/* faq */
.faq details{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin-bottom:12px;cursor:pointer}
.faq summary{font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::after{content:"+";font-size:24px;color:var(--purple2)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:12px;color:var(--muted)}

/* form */
.form{max-width:560px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px}
.form label{display:block;margin-bottom:6px;font-size:14px;color:var(--muted)}
.form input,.form select,.form textarea{width:100%;padding:12px 14px;border-radius:8px;background:var(--bg2);border:1px solid var(--border);color:var(--text);font-size:15px;margin-bottom:18px;font-family:inherit}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--purple2)}
.form textarea{min-height:130px;resize:vertical}

/* footer */
.site-footer{background:#0a0620;border-top:1px solid var(--border);padding:64px 0 32px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:40px;margin-bottom:40px}
.footer-col h4{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:#cfcbe6;font-size:14px;transition:color .2s}
.footer-col a:hover{color:var(--purple2)}
.footer-brand p{color:var(--muted);font-size:14px;max-width:280px;margin-top:12px}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;color:var(--muted);font-size:13px;flex-wrap:wrap;gap:12px}

/* responsive */
@media (max-width:960px){
  .hero-grid,.grid-3,.grid-2,.price-grid,.dl-grid,.stats,.footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:38px}
  .section-title{font-size:30px}
  .nav-links{display:none}
  .stats{grid-template-columns:repeat(2,1fr)}
}