:root{
  color-scheme: dark;
  --bg:#070a12; --bg2:#0b1020; --card:rgba(255,255,255,.045); --card2:rgba(255,255,255,.08);
  --text:#f3f6fc; --muted:rgba(243,246,252,.68); --line:rgba(255,255,255,.12);
  --blue:#7db4ff; --blue2:#5b8cff; --red:#ff6a5c;
  --r:24px; --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background-color:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;
  font-family:system-ui,-apple-system,"Segoe UI","Noto Sans TC","Microsoft JhengHei",Arial,sans-serif;
  background-image:radial-gradient(1000px 600px at 12% -5%,rgba(125,180,255,.18),transparent 60%),radial-gradient(800px 500px at 100% 10%,rgba(255,106,92,.10),transparent 60%),linear-gradient(180deg,var(--bg2),var(--bg) 60%);
  background-repeat:no-repeat}
a{color:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:8px}
.skip{position:absolute;left:-999px;top:8px;background:var(--blue);color:#06101f;padding:8px 14px;border-radius:999px;z-index:1001}
.skip:focus{left:12px}
.wrap{max-width:var(--maxw);margin:auto;padding:0 20px 72px}

.top{position:sticky;top:0;z-index:50;background:rgba(7,10,18,.78);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top .in{max-width:var(--maxw);margin:auto;padding:11px 20px;display:flex;align-items:center;gap:16px;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}
.brand img{width:30px;height:30px;border-radius:9px}
.top nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0}
.top nav a{display:block;padding:6px 12px;border-radius:999px;font-size:14px;color:var(--muted);text-decoration:none}
.top nav a:hover{color:var(--text);background:rgba(255,255,255,.08)}
.right{display:flex;align-items:center;gap:10px}
.lang{font-size:13px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--muted)}
.lang:hover{color:var(--text);border-color:rgba(255,255,255,.3)}

.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;border:1px solid var(--line);background:var(--card2);color:var(--text);transition:transform .16s ease,border-color .16s ease}
.btn:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.34)}
.btn.primary{border-color:transparent;background:linear-gradient(135deg,#9cc6ff,#5b8cff);color:#04101f}
.btn.sm{padding:8px 16px;font-size:14px}

.hero{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:center;padding:56px 0 20px}
.nw{white-space:nowrap}
.kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.appname{display:flex;align-items:center;gap:16px;margin:14px 0 6px}
.appname img{width:72px;height:72px;border-radius:20px;box-shadow:0 12px 34px rgba(0,0,0,.5)}
h1{font-size:clamp(34px,5.2vw,56px);line-height:1.05;margin:0;font-weight:750;letter-spacing:-.01em}
.tagline{font-size:clamp(18px,2.4vw,24px);margin:6px 0 0;color:rgba(255,255,255,.9);font-weight:500}
.lead{color:var(--muted);font-size:16px;max-width:56ch;margin:16px 0 0}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:34px 0 0;padding:0}
.facts div{border-left:2px solid var(--red);padding-left:12px}
.facts dt{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.facts dd{margin:3px 0 0;font-size:14px;font-weight:600}

.shot{margin:0;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.6);background:#000}
.shot img{display:block;width:100%;height:auto}

section{margin-top:84px}
h2{font-size:clamp(24px,3.4vw,34px);line-height:1.2;margin:0;font-weight:720;letter-spacing:-.005em}
.sub{margin:10px 0 28px;color:var(--muted);max-width:68ch}
h3{margin:0;font-size:16px}
.grid{display:grid;gap:18px}
.g4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.card{border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(180deg,var(--card2),var(--card));padding:22px}
.card p{margin:8px 0 0;color:var(--muted);font-size:14.5px}
.num{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#04101f;font-weight:700;font-size:14px;margin-bottom:12px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--red);display:inline-block;margin-right:8px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split.rev .shot{order:-1}
.split p{color:var(--muted)}
.lib{width:100%;border-collapse:separate;border-spacing:0;margin-top:26px;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.lib th,.lib td{padding:13px 16px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.lib th{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);background:var(--card)}
.lib tr:last-child td{border-bottom:0}
.lib td:first-child{font-weight:650;white-space:nowrap}
.lib a{color:var(--blue)}
.pill{font-size:12px;padding:2px 10px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}

.qa{border:1px solid var(--line);border-radius:18px;background:var(--card);margin-bottom:12px;padding:0 20px}
.qa summary{cursor:pointer;padding:16px 0;font-weight:620;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;gap:14px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--blue);font-size:22px;line-height:1}
.qa[open] summary::after{content:"\2212"}
.qa p{margin:0 0 18px;color:rgba(255,255,255,.8);font-size:15px;max-width:76ch}

.cta{text-align:center;padding:48px 22px;border-radius:30px;border:1px solid var(--line);background:radial-gradient(640px 240px at 50% 0%,rgba(125,180,255,.22),transparent 70%),linear-gradient(180deg,var(--card2),var(--card))}
.cta .sub{margin-left:auto;margin-right:auto}
.cta .actions{justify-content:center}
.crumbs{font-size:13px;color:var(--muted);padding-top:22px}
.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}
.pagehead{padding:30px 0 6px;max-width:760px}
.steps{counter-reset:s;list-style:none;margin:0;padding:0;display:grid;gap:14px}
.steps li{counter-increment:s;position:relative;padding:18px 20px 18px 66px;border-radius:20px;border:1px solid var(--line);background:var(--card)}
.steps li::before{content:counter(s);position:absolute;left:18px;top:16px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#04101f;background:linear-gradient(135deg,var(--blue),var(--blue2))}
.steps b{display:block;font-size:16px}
.steps span{color:var(--muted);font-size:14.5px}
.dl3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}

footer{margin-top:60px;border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
footer a{text-decoration:none;color:rgba(255,255,255,.82)}footer a:hover{text-decoration:underline}
footer nav{display:flex;gap:16px;flex-wrap:wrap}

@media(max-width:900px){.hero,.split{grid-template-columns:1fr}.split.rev .shot{order:0}.top nav{display:none}.facts{grid-template-columns:1fr}.hero{padding-top:34px}}
@media(max-width:560px){.lib th:nth-child(3),.lib td:nth-child(3){display:none}.wrap{padding:0 16px 56px}.top .in{padding:10px 16px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}.btn:hover{transform:none}}