:root{
  --bg:#070a12;
  --bg-2:#0a0e17;
  --panel:#0e1420;
  --panel-2:#111827;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#e8ecf4;
  --muted:#8a93a6;
  --muted-2:#5f6779;
  --brand:#38e1b0;
  --brand-2:#4aa8ff;
  --brand-3:#7c6cff;
  --warn:#ffb454;
  --danger:#ff5a6a;
  --radius:16px;
  --maxw:1180px;
  --glow: 0 0 0 1px rgba(56,225,176,.25), 0 20px 60px -20px rgba(56,225,176,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Noto Sans TC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
::selection{background:rgba(56,225,176,.3);color:#fff}

/* ambient background */
.bg-orbs{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.orb.a{width:520px;height:520px;background:radial-gradient(circle,#0e5e4a,transparent 70%);top:-140px;left:-120px}
.orb.b{width:560px;height:560px;background:radial-gradient(circle,#123a63,transparent 70%);top:220px;right:-180px}
.orb.c{width:480px;height:480px;background:radial-gradient(circle,#2a1f66,transparent 70%);bottom:-160px;left:35%}
.grid-overlay{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:2}

/* nav */
header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(7,10,18,.92),rgba(7,10,18,.55));
  border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;letter-spacing:.2px}
.logo{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 6px 18px -6px rgba(56,225,176,.7)}
.logo svg{width:18px;height:18px;display:block}
.brand small{color:var(--muted);font-weight:500;font-size:12px;margin-left:2px;letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:10px;font-weight:600;font-size:14.5px;
  padding:10px 18px;cursor:pointer;border:1px solid transparent;transition:all .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--brand),#2bc79b);color:#04140f;
  box-shadow:0 10px 24px -10px rgba(56,225,176,.8)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 30px -10px rgba(56,225,176,.95)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.25)}
.nav-cta{display:flex;gap:12px;align-items:center}
.lang-switch{display:inline-flex;align-items:center;border:1px solid var(--line-2);border-radius:9px;overflow:hidden;font-size:13px;font-weight:600}
.lang-switch a,.lang-switch span{padding:7px 12px;color:var(--muted);transition:all .2s}
.lang-switch span{background:rgba(56,225,176,.14);color:var(--brand)}
.lang-switch a:hover{color:var(--text);background:rgba(255,255,255,.06)}

/* hero */
.hero{padding:92px 0 70px;text-align:center;position:relative}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(56,225,176,.08);border:1px solid rgba(56,225,176,.25);
  font-size:13px;color:var(--brand);font-weight:500;margin-bottom:26px}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
h1.hero-title{font-weight:800;font-size:clamp(38px,6vw,72px);line-height:1.12;letter-spacing:-.02em;margin-bottom:22px}
.hero-title .grad{background:linear-gradient(120deg,var(--brand) 0%,var(--brand-2) 55%,var(--brand-3) 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:clamp(16px,2vw,20px);color:var(--muted);max-width:680px;margin:0 auto 38px;font-weight:400}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:12px}
.hero-note{font-size:13px;color:var(--muted-2);font-family:"JetBrains Mono",monospace}

/* stat bar */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:64px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{background:var(--bg-2);padding:26px 20px;text-align:center}
.stat .n{font-family:"JetBrains Mono",monospace;font-size:clamp(26px,3.4vw,38px);font-weight:700;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .l{font-size:13.5px;color:var(--muted);margin-top:6px}

/* section shell */
section{position:relative;z-index:2;padding:96px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 56px}
.kicker{font-family:"JetBrains Mono",monospace;font-size:13px;letter-spacing:2px;text-transform:uppercase;
  color:var(--brand);font-weight:500;margin-bottom:14px}
h2{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.18;margin-bottom:16px}
.sec-head p{color:var(--muted);font-size:16.5px}

/* feature grid */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:linear-gradient(180deg,var(--panel),rgba(10,14,23,.6));
  border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
  transition:transform .25s,border-color .25s,box-shadow .25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:var(--radius);
  background:radial-gradient(500px circle at var(--mx,50%) var(--my,0%),rgba(56,225,176,.10),transparent 40%);
  opacity:0;transition:opacity .3s;pointer-events:none}
.card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:0 24px 50px -30px rgba(0,0,0,.9)}
.card:hover::before{opacity:1}
.ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(56,225,176,.16),rgba(74,168,255,.10));border:1px solid rgba(56,225,176,.22)}
.ic svg{width:23px;height:23px;stroke:var(--brand);fill:none;stroke-width:1.8}
.card h3{font-size:18.5px;font-weight:700;margin-bottom:9px}
.card p{color:var(--muted);font-size:14.5px}

/* metrics / probe types */
.metrics-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.metric-list{display:flex;flex-direction:column;gap:14px}
.metric-row{display:flex;align-items:center;gap:16px;padding:16px 18px;border:1px solid var(--line);
  border-radius:12px;background:var(--panel);transition:border-color .2s,background .2s}
.metric-row:hover{border-color:rgba(56,225,176,.35);background:var(--panel-2)}
.metric-row .tag{font-family:"JetBrains Mono",monospace;font-size:12px;font-weight:700;color:var(--brand);
  background:rgba(56,225,176,.1);border:1px solid rgba(56,225,176,.25);padding:4px 9px;border-radius:7px;min-width:66px;text-align:center}
.metric-row .txt strong{display:block;font-size:15px;font-weight:600}
.metric-row .txt span{font-size:13px;color:var(--muted)}
/* terminal card */
.terminal{background:#060910;border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;
  box-shadow:0 40px 80px -40px rgba(0,0,0,.95)}
.term-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.term-bar .d{width:11px;height:11px;border-radius:50%}
.d.r{background:#ff5f57}.d.y{background:#febc2e}.d.g{background:#28c840}
.term-bar .title{margin-left:8px;font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--muted)}
.term-body{padding:20px;font-family:"JetBrains Mono",monospace;font-size:13px;line-height:1.9}
.term-body .ln{white-space:pre-wrap}
.c-brand{color:var(--brand)}.c-blue{color:var(--brand-2)}.c-mut{color:var(--muted)}.c-warn{color:var(--warn)}.c-ok{color:#4ade80}.c-err{color:var(--danger)}

/* use cases */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{padding:28px 24px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,var(--panel),transparent);position:relative}
.case .num{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--brand);margin-bottom:14px;font-weight:700}
.case h3{font-size:18px;margin-bottom:10px}
.case p{color:var(--muted);font-size:14.5px}
.case ul{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:8px}
.case li{font-size:13.5px;color:var(--muted);display:flex;gap:9px;align-items:flex-start}
.case li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:8px;flex:none}

/* benefits */
.benefits{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.benefit{padding:26px 22px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.benefit .b-ic{font-size:24px;margin-bottom:14px}
.benefit h4{font-size:16px;margin-bottom:8px}
.benefit p{font-size:13.5px;color:var(--muted)}

/* pricing */
.pricing{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch}
.plan{border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;background:var(--panel);
  display:flex;flex-direction:column;transition:transform .25s,border-color .25s}
.plan:hover{transform:translateY(-4px)}
.plan.feat{border-color:rgba(56,225,176,.5);background:linear-gradient(180deg,rgba(56,225,176,.06),var(--panel));
  box-shadow:var(--glow);position:relative}
.plan.feat .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#04140f;font-size:12px;font-weight:700;
  padding:5px 14px;border-radius:999px;white-space:nowrap}
.plan.payg{border-color:rgba(74,168,255,.45);background:linear-gradient(180deg,rgba(74,168,255,.06),var(--panel))}
.plan .pname{font-size:15px;font-weight:600;color:var(--muted);margin-bottom:10px}
.plan .price{font-family:"JetBrains Mono",monospace;font-size:34px;font-weight:700;letter-spacing:-1px}
.plan .price small{font-size:13.5px;color:var(--muted);font-weight:400}
.plan .pdesc{font-size:13.5px;color:var(--muted);margin:10px 0 20px;min-height:54px}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:11px;margin-bottom:24px;flex:1}
.plan li{font-size:13.5px;display:flex;gap:9px;align-items:flex-start;color:var(--text)}
.plan li svg{width:17px;height:17px;stroke:var(--brand);fill:none;stroke-width:2;flex:none;margin-top:2px}
.plan li.off{color:var(--muted-2)}
.plan li.off svg{stroke:var(--muted-2)}
.plan .btn{width:100%;justify-content:center}

/* faq */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.qa{border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}
.qa summary{cursor:pointer;padding:20px 22px;font-weight:600;font-size:16px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px}
.qa summary::-webkit-details-marker{display:none}
.qa summary .plus{transition:transform .25s;color:var(--brand);font-size:22px;flex:none}
.qa[open] summary .plus{transform:rotate(45deg)}
.qa .a{padding:0 22px 20px;color:var(--muted);font-size:14.5px}

/* cta band */
.cta-band{margin:0 auto;max-width:var(--maxw);
  border:1px solid rgba(56,225,176,.28);border-radius:24px;padding:60px 40px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(56,225,176,.10),rgba(74,168,255,.06),rgba(124,108,255,.08))}
.cta-band::after{content:"";position:absolute;inset:0;background:radial-gradient(600px circle at 50% -20%,rgba(56,225,176,.2),transparent 60%);pointer-events:none}
.cta-band h2{margin-bottom:14px}
.cta-band p{color:var(--muted);max-width:540px;margin:0 auto 30px;font-size:16px}

/* footer */
footer{border-top:1px solid var(--line);padding:52px 0 34px;position:relative;z-index:2;margin-top:40px}
.foot{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot .col h5{font-size:13px;text-transform:uppercase;letter-spacing:1px;color:var(--muted-2);margin-bottom:14px}
.foot .col a,.foot .col span{display:block;color:var(--muted);font-size:14px;margin-bottom:9px;transition:color .2s}
.foot .col a:hover{color:var(--brand)}
.foot-brand{max-width:300px}
.foot-brand p{color:var(--muted);font-size:14px;margin-top:14px}
.copy{margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--muted-2);font-size:13px}

/* legal pages */
.legal{max-width:840px;margin:0 auto;padding:70px 24px 40px;position:relative;z-index:2}
.legal h1{font-size:clamp(30px,4.4vw,44px);font-weight:800;letter-spacing:-.02em;margin-bottom:10px}
.legal .updated{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--muted-2);margin-bottom:44px}
.legal h2{font-size:21px;margin:40px 0 14px;font-weight:700}
.legal p,.legal li{color:var(--muted);font-size:15px}
.legal p{margin-bottom:12px}
.legal ul{padding-left:22px;margin-bottom:12px;display:flex;flex-direction:column;gap:7px}
.legal strong{color:var(--text)}
.legal a{color:var(--brand);border-bottom:1px dashed rgba(56,225,176,.4)}
.legal .notice{border:1px solid rgba(74,168,255,.35);background:rgba(74,168,255,.07);border-radius:12px;padding:16px 20px;margin:20px 0}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

@media(max-width:1020px){
  .pricing{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .features,.cases{grid-template-columns:1fr 1fr}
  .benefits{grid-template-columns:1fr 1fr}
  .metrics-wrap{grid-template-columns:1fr;gap:30px}
  .stats{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links{display:none}
  .nav-cta .btn-ghost{display:none}
  .features,.cases,.benefits,.pricing{grid-template-columns:1fr}
  section{padding:70px 0}
  .hero{padding:64px 0 50px}
  .cta-band{padding:44px 24px;margin:0 24px}
}