:root{
  --bg:#ffffff; --bg2:#f4f6fb; --text:#0f172a; --muted:#566074; --line:#e3e8f2;
  --brand:#4f46e5; --brand2:#06b6d4; --card:#ffffff; --hero:#0b1020;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b1020; --bg2:#10172b; --text:#e8ecf6; --muted:#9aa6bf; --line:#1f2a45; --card:#121a30; --hero:#070b17; }
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font:16px/1.75 -apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:20;background:color-mix(in srgb,var(--hero) 82%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08);color:#fff}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:1px}
.menu{display:flex;align-items:center;gap:28px;font-size:15px}
.menu a:not(.btn){opacity:.8;transition:opacity .2s}
.menu a:not(.btn):hover{opacity:1}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer}
.burger i{display:block;width:22px;height:2px;background:#fff;margin:5px 0}

/* buttons */
.btn{display:inline-block;padding:12px 26px;border-radius:999px;border:0;cursor:pointer;font:inherit;font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand2));transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(79,70,229,.35)}
.btn.small{padding:7px 18px;font-size:14px}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.35)}

/* hero */
.hero{position:relative;background:var(--hero);color:#fff;padding:150px 0 90px;overflow:hidden}
.hero canvas{position:absolute;inset:0;width:100%;height:100%}
.hero-in{position:relative}
.eyebrow{color:var(--brand2);letter-spacing:3px;font-size:14px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,5.2vw,54px);line-height:1.3;font-weight:800}
.grad{background:linear-gradient(90deg,#67e8f9,#a5b4fc);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:640px;margin:24px 0 34px;color:#b8c2da;font-size:18px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{list-style:none;display:flex;gap:10px;flex-wrap:wrap;margin-top:56px;padding:0}
.hero-tags li{padding:6px 16px;border:1px solid rgba(255,255,255,.18);border-radius:999px;font-size:14px;color:#cbd5ec}

/* sections */
.sec{padding:90px 0}
.sec.alt{background:var(--bg2)}
.kicker{color:var(--brand);font-weight:600;letter-spacing:2px;font-size:14px;margin-bottom:8px}
h2{font-size:clamp(26px,3.6vw,36px);margin-bottom:22px;line-height:1.35}
.two{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:start}
.two p{color:var(--muted);margin-bottom:14px}
.values{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.values div{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.values b{display:block;font-size:20px;margin-bottom:4px}
.values span{color:var(--muted);font-size:14px}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(15,23,42,.12);border-color:var(--brand)}
.ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;background:linear-gradient(135deg,rgba(79,70,229,.14),rgba(6,182,212,.14))}
.ico svg{width:26px;height:26px;fill:none;stroke:var(--brand);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 20px}
.tabs button{padding:9px 20px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--text);font:inherit;cursor:pointer}
.tabs button[aria-selected=true]{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-color:transparent}
.panel{display:none;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:32px}
.panel.show{display:block;animation:fade .3s}
.panel h3{font-size:22px;margin-bottom:8px}
.panel p{color:var(--muted);margin-bottom:14px}
.panel ul{padding-left:20px;color:var(--text)}
.panel li{margin:4px 0}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* steps */
.steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:34px;counter-reset:s}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 18px;position:relative}
.steps li::before{content:"0" counter(s);display:block;font-size:30px;font-weight:800;color:var(--brand);opacity:.35;margin-bottom:6px}
.steps b{display:block;font-size:17px}
.steps span{color:var(--muted);font-size:14px}

/* contact */
.info{display:grid;grid-template-columns:90px 1fr;gap:10px 8px;margin-top:24px;font-size:15px}
.info dt{color:var(--muted)}
.form{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px;display:grid;gap:16px}
.form label{display:grid;gap:6px;font-size:14px;color:var(--muted)}
.form input,.form select,.form textarea{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;outline:none}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.18)}
.form input.err{border-color:#ef4444}
.tip{font-size:14px;min-height:20px;color:var(--brand2)}

.foot{background:var(--hero);color:#8d98b3;font-size:14px;padding:26px 0}
.foot-in{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:860px){
  .two{grid-template-columns:1fr;gap:32px}
  .grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .burger{display:block}
  .menu{position:absolute;top:64px;left:0;right:0;background:var(--hero);flex-direction:column;align-items:flex-start;padding:16px 20px 22px;gap:16px;display:none}
  .menu.open{display:flex}
}
@media (max-width:560px){
  .grid,.values{grid-template-columns:1fr}
  .hero{padding-top:120px}
  .sec{padding:64px 0}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}
.info a,.foot a{text-decoration:underline;text-underline-offset:3px}
.foot a:hover{color:#fff}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.tip a{text-decoration:underline}