:root{
  --bg:#0b1020; --bg2:#0f1530; --surface:#ffffff; --surface-2:#f6f8fc;
  --ink:#0e1726; --ink-2:#475069; --ink-3:#8a93a8;
  --line:#e6eaf2; --brand:#3b5bff; --brand-2:#7c4dff;
  --accent:#3b5bff; --accent2:#7c4dff;
  --radius:18px; --radius-sm:12px; --shadow:0 18px 50px -22px rgba(13,23,38,.35);
  --maxw:1180px; --header-h:68px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.luc{display:inline-flex;align-items:center;justify-content:center;line-height:0;vertical-align:middle}
.luc svg{width:1em!important;height:1em!important;display:block}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;border-radius:999px;padding:12px 22px;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 14px 30px -12px var(--accent)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.05)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-dark{background:#0e1726;color:#fff}
.btn-dark:hover{transform:translateY(-2px)}

/* ---------------- Header / Nav ---------------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid transparent;transition:.25s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 10px 30px -24px rgba(13,23,38,.5)}
.nav-wrap{max-width:var(--maxw);margin:0 auto;height:var(--header-h);padding:0 22px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.01em}
.brand-mark{width:32px;height:32px;border-radius:100px;color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:0 8px 18px -8px var(--brand)}
.brand em{font-style:normal;color:var(--ink-3);font-weight:600}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav>a,.nav-link{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:10px;font-weight:600;color:var(--ink-2);background:none;border:none;font-family:inherit;font-size:15px;cursor:pointer;transition:.18s}
.nav>a:hover,.nav-link:hover{color:var(--ink);background:var(--surface-2)}
.caret{font-size:10px;transition:.25s}
.nav-item{position:relative}
.nav-item.has-mega:hover .caret,.nav-item.has-mega.open .caret{transform:rotate(180deg)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:10px}

/* ---------------- Mega menu（渐进式浮出） ---------------- */
.mega{position:absolute;top:calc(100% + 10px);left:0;width:min(820px,86vw);background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:20px;opacity:0;visibility:hidden;transform:translateY(14px) scale(.98);transform-origin:top left;transition:opacity .28s ease,transform .32s cubic-bezier(.2,.8,.2,1),visibility .28s}
.nav-item.has-mega:hover .mega,.nav-item.has-mega.open .mega,.nav-item.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.mega::before{content:"";position:absolute;top:-12px;left:40px;width:22px;height:22px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line);transform:rotate(45deg)}
.mega-inner{}
.mega-head{display:flex;align-items:baseline;gap:12px;padding-bottom:14px;margin-bottom:8px;border-bottom:1px solid var(--line)}
.mega-head strong{font-size:17px}
.mega-head span{color:var(--ink-3);font-size:13px}
.mega-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:18px 22px}
.mega-col{opacity:0;transform:translateY(14px);transition:opacity .42s ease,transform .42s cubic-bezier(.2,.8,.2,1)}
.nav-item.has-mega:hover .mega-col,.nav-item.has-mega.open .mega-col{opacity:1;transform:translateY(0)}
.mega-col:nth-child(1){transition-delay:.05s}
.mega-col:nth-child(2){transition-delay:.11s}
.mega-col:nth-child(3){transition-delay:.17s}
.mega-col:nth-child(4){transition-delay:.23s}
.mega-col:nth-child(5){transition-delay:.29s}
.mega-col:nth-child(6){transition-delay:.35s}
.mega-col:nth-child(7){transition-delay:.41s}
.mega-col:nth-child(8){transition-delay:.47s}
.mega-col:nth-child(9){transition-delay:.53s}
.mega-col h4{display:flex;align-items:center;gap:8px;margin:0 0 10px;font-size:13px;color:var(--ink);text-transform:none;letter-spacing:.02em}
.mega-col h4 .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.mega-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.mega-col li a{display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:9px;color:var(--ink-2);font-size:14px;font-weight:500;transition:.16s}
.mega-col li a:hover{background:var(--surface-2);color:var(--accent)}
.mega-col li a .luc{color:var(--accent);font-size:16px;flex:none}
.mega-foot{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);text-align:right}
.mega-foot a{font-weight:700;color:var(--accent)}

/* ---------------- Hero ---------------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 600px at 80% -10%,rgba(124,77,255,.18),transparent),linear-gradient(180deg,#0b1020,#0f1530);color:#eef2ff;padding:96px 0 84px}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(900px 500px at 70% 0%,#000,transparent);opacity:.7}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.08;margin:14px 0 18px;letter-spacing:-.01em;font-weight:850}
.hero h1 .grad{background:linear-gradient(120deg,#8ab4ff,#c4a3ff 55%,#ffd1a8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(16px,2vw,20px);color:#b9c2e6;max-width:680px;margin:0 0 30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:46px;padding-top:30px;border-top:1px solid rgba(255,255,255,.1)}
.hero-stats .num{font-size:30px;font-weight:850;color:#fff}
.hero-stats .lbl{color:#9aa6d4;font-size:13px;margin-top:2px}
.hero-art{position:absolute;right:-40px;top:50%;transform:translateY(-50%);width:440px;max-width:42vw;opacity:.9;z-index:1}
@media(max-width:900px){.hero-art{display:none}}

/* ---------------- Sections ---------------- */
section{padding:74px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 42px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);margin:12px 0 12px;letter-spacing:-.01em;font-weight:820}
.sec-head p{color:var(--ink-2);margin:0;font-size:17px}

/* categories */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:18px}
.cat-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--surface);transition:.22s;overflow:hidden}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.cat-card .ic{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));font-size:24px;margin-bottom:14px}
.cat-card h3{margin:0 0 6px;font-size:19px}
.cat-card p{color:var(--ink-2);margin:0 0 14px;font-size:14.5px;min-height:42px}
.cat-card .meta{font-size:13px;color:var(--ink-3);font-weight:600}

/* product grid */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:20px}
.prod-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:24px;transition:.25s;overflow:hidden;display:flex;flex-direction:column}
.prod-card::after{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--accent),var(--accent2));transform:scaleX(0);transform-origin:left;transition:.3s}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.prod-card:hover::after{transform:scaleX(1)}
.prod-card .top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.prod-card .badge{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));font-size:26px;flex:none}
.prod-card .tag{font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.04em}
.prod-card h3{margin:2px 0 0;font-size:19px}
.prod-card .desc{color:var(--ink-2);font-size:14.5px;margin:0 0 18px;flex:1}
.prod-card .more{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--accent);font-size:14.5px}
.prod-card:hover .more .luc{transform:translateX(4px)}
.prod-card .more .luc{transition:.2s}

/* generic feature/value blocks */
.cols-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.card{border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px;background:var(--surface);transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));font-size:22px;margin-bottom:12px}
.card h4{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--ink-2);font-size:14.5px}
.list-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.list-item{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface)}
.list-item .luc{color:var(--accent);font-size:20px;flex:none;margin-top:2px}
.list-item b{display:block;font-size:15.5px;margin-bottom:2px}
.list-item span{color:var(--ink-2);font-size:14px}
.value-band{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:24px;padding:46px;position:relative;overflow:hidden}
.value-band::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.14)}
.value-band h3{margin:0 0 10px;font-size:14px;letter-spacing:.14em;text-transform:uppercase;opacity:.85;font-weight:700}
.value-band p{margin:0;font-size:clamp(19px,2.6vw,26px);font-weight:750;line-height:1.5;max-width:860px;position:relative}

/* ---------------- Product detail page ---------------- */
.phero{position:relative;overflow:hidden;color:#fff;padding:64px 0 56px}
.phero .motif{position:absolute;inset:0;opacity:.9;z-index:0}
.phero .wrap{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.8);font-size:14px;margin-bottom:18px}
.crumb a:hover{color:#fff}
.phero .ptop{display:flex;align-items:center;gap:18px;margin-bottom:18px}
.phero .pbadge{width:74px;height:74px;border-radius:20px;display:grid;place-items:center;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);font-size:38px;backdrop-filter:blur(4px)}
.phero .chip{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);font-size:13px;font-weight:700;margin-bottom:10px}
.phero h1{font-size:clamp(30px,4.6vw,50px);margin:6px 0 6px;font-weight:850}
.phero .pen{opacity:.85;font-size:15px;letter-spacing:.04em;margin:0 0 16px}
.phero .ptag{font-size:clamp(17px,2.2vw,22px);font-weight:650;max-width:760px;margin:0 0 22px}
.phero .pactions{display:flex;gap:12px;flex-wrap:wrap}
.phero .pactions .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.34)}
.phero .pactions .btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff}
.showcase{margin-top:30px;border-radius:20px;overflow:hidden;box-shadow:0 30px 60px -30px rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.2)}
.showcase img{width:100%}
.psection{padding:64px 0}
.psection.alt{background:var(--surface-2)}
.block-title{display:flex;align-items:center;gap:12px;margin:0 0 26px}
.block-title .bar{width:5px;height:26px;border-radius:4px;background:linear-gradient(180deg,var(--accent),var(--accent2))}
.block-title h2{margin:0;font-size:clamp(24px,3vw,32px);font-weight:820}
.block-title .sub{color:var(--ink-3);font-size:14px;margin-left:auto;font-weight:600}
.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}

/* ---------------- Footer ---------------- */
.site-footer{background:#0b1020;color:#c2cae6;padding:60px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.site-footer h5{color:#fff;font-size:14px;letter-spacing:.06em;text-transform:uppercase;margin:0 0 16px}
.site-footer a{color:#aab4d8;display:block;padding:5px 0;font-size:14.5px;transition:.16s}
.site-footer a:hover{color:#fff}
.foot-brand p{color:#8b95bd;font-size:14.5px;max-width:320px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#7d88b3;font-size:13.5px}
.foot-bottom .links{display:flex;gap:18px;flex-wrap:wrap}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.mega,.mega-col{transition:none}}

@media(max-width:860px){
  .mega-cols{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav{display:none}
}