/* ===== GFT Security — shared design system ===== */
:root{
  --bg:#0a1320;--bg-2:#0c1828;--surface:#101f35;--surface-2:#13263f;--surface-hi:#16294a;
  --line:rgba(150,178,220,.13);--line-2:rgba(150,178,220,.22);
  --text:#eaf1fb;--muted:#9db0cc;--muted-2:#67789a;
  --accent:#3f86e0;--accent-2:#6aa8f2;--accent-soft:rgba(63,134,224,.13);--gold:#d9a441;
  --maxw:1240px;--ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--text);font-family:'Noto Sans TC',sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
::selection{background:rgba(63,134,224,.32);}
a{color:inherit;text-decoration:none;}
h1,h2,h3{margin:0;font-weight:900;letter-spacing:-.01em;line-height:1.12;}
.mono{font-family:'JetBrains Mono',monospace;}
.grotesk{font-family:'Space Grotesk',sans-serif;}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.26em;text-transform:uppercase;color:var(--accent-2);}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px;}

/* atmospheric background */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;}
.bg-fx .grid{position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;opacity:.4;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 0%,transparent 75%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 0%,transparent 75%);}
.bg-fx .glow1{position:absolute;top:-340px;right:-180px;width:760px;height:760px;border-radius:50%;background:radial-gradient(circle,rgba(63,134,224,.22),transparent 62%);filter:blur(20px);}
.bg-fx .glow2{position:absolute;top:380px;left:-280px;width:680px;height:680px;border-radius:50%;background:radial-gradient(circle,rgba(40,80,150,.20),transparent 64%);filter:blur(20px);}
.content{position:relative;z-index:1;}

/* nav */
header{position:sticky;top:0;z-index:40;}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px;background:rgba(10,19,32,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);}
.brand{display:flex;align-items:center;gap:11px;}
.brand-plate{display:inline-flex;align-items:center;background:#fff;border-radius:11px;padding:8px 16px;
  box-shadow:0 8px 20px -8px rgba(0,0,0,.6),0 1px 0 rgba(255,255,255,.7) inset,0 0 0 1px rgba(0,0,0,.05);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);}
.brand:hover .brand-plate{transform:translateY(-1px);box-shadow:0 12px 26px -8px rgba(0,0,0,.7),0 1px 0 rgba(255,255,255,.7) inset,0 0 0 1px rgba(0,0,0,.05);}
.brand-plate img{height:34px;width:auto;display:block;}
.brand .logo{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;position:relative;overflow:hidden;background:linear-gradient(150deg,#4f96ec,#274d86);box-shadow:0 6px 16px -2px rgba(63,134,224,.5),0 2px 0 rgba(255,255,255,.25) inset,0 -6px 10px rgba(13,30,60,.5) inset;flex:0 0 auto;}
.brand .logo::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.45),rgba(255,255,255,0) 52%);pointer-events:none;}
.brand .logo svg{position:relative;z-index:1;filter:drop-shadow(0 1px 1px rgba(0,28,66,.55));}
.brand .name{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:19px;letter-spacing:-.01em;white-space:nowrap;}
.brand .name b{color:var(--accent-2);font-weight:700;}
.brand .zh{font-size:11px;color:var(--muted-2);letter-spacing:.16em;margin-top:1px;}
nav.menu{display:flex;gap:30px;}
nav.menu a{font-size:14.5px;color:var(--muted);font-weight:500;transition:color .2s;position:relative;white-space:nowrap;}
nav.menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:width .25s var(--ease);}
nav.menu a:hover,nav.menu a.active{color:var(--text);}
nav.menu a:hover::after,nav.menu a.active::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:14px;}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:'Noto Sans TC',sans-serif;font-weight:700;font-size:14.5px;padding:11px 21px;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:.22s var(--ease);white-space:nowrap;}
.btn .arr{transition:transform .22s var(--ease);}
.btn:hover .arr{transform:translateX(3px);}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(63,134,224,.32),inset 0 1px 0 rgba(255,255,255,.25);}
.btn-primary:hover{background:#4c91ea;box-shadow:0 12px 30px rgba(63,134,224,.42),inset 0 1px 0 rgba(255,255,255,.3);transform:translateY(-1px);}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--text);border-color:var(--line-2);}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--accent);}
.btn-lg{padding:14px 26px;font-size:15.5px;}

/* section base */
section.block{padding:104px 0;}
.sec-head{max-width:680px;margin-bottom:54px;}
.sec-head h2{font-size:clamp(30px,3.6vw,46px);margin-top:14px;}
.sec-head p{color:var(--muted);font-size:17px;margin:18px 0 0;}
.sec-head.center{margin:0 auto 56px;text-align:center;}

/* page hero band */
.page-hero{padding:78px 0 64px;border-bottom:1px solid var(--line);position:relative;}
.page-hero .crumb{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted-2);letter-spacing:.08em;margin-bottom:20px;}
.page-hero .crumb a:hover{color:var(--accent-2);}
.page-hero h1{font-size:clamp(34px,4.4vw,56px);margin-top:14px;}
.page-hero h1 .hl{color:transparent;background:linear-gradient(100deg,var(--accent-2),#a7cbf6 60%,var(--accent));-webkit-background-clip:text;background-clip:text;}
.page-hero p.lead{color:var(--muted);font-size:18px;max-width:600px;margin:22px 0 0;line-height:1.7;}

/* standard pills */
.std{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--muted);padding:8px 15px;border:1px solid var(--line);border-radius:8px;background:var(--surface);transition:.2s;}
.std:hover{color:var(--text);border-color:var(--line-2);}
.std.dk{border-color:var(--line-2);color:var(--accent-2);background:var(--accent-soft);}

/* footer */
footer{border-top:1px solid var(--line);background:rgba(8,14,24,.6);padding:58px 0 34px;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.foot-grid h5{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.14em;color:var(--muted-2);text-transform:uppercase;margin:0 0 18px;font-weight:600;padding-bottom:9px;border-bottom:1px solid var(--line-2);}
.foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.foot-grid li a{color:var(--muted);font-size:14.5px;transition:color .2s;}
.foot-grid li a:hover{color:var(--text);}
.foot-brand p{color:var(--muted);font-size:14px;margin:16px 0 0;max-width:280px;line-height:1.7;}
.foot-contact{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--muted);display:flex;flex-direction:column;gap:10px;}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:46px;padding-top:26px;border-top:1px solid var(--line);flex-wrap:wrap;}
.foot-bottom span{color:var(--muted-2);font-size:13px;}

/* shared 3D icon crystal */
.svc-ico{width:74px;height:74px;border-radius:20px;display:grid;place-items:center;flex:0 0 auto;position:relative;isolation:isolate;
  background:linear-gradient(158deg,#22456f 0%,#16294a 46%,#0b1626 100%);border:1px solid rgba(150,178,220,.20);
  box-shadow:0 2px 1px rgba(255,255,255,.16) inset,0 -14px 22px rgba(7,14,26,.6) inset,0 16px 26px -12px rgba(0,0,0,.75),0 12px 26px -10px rgba(63,134,224,.5);}
.svc-ico::before{content:"";position:absolute;inset:1px;border-radius:19px;z-index:0;pointer-events:none;
  background:radial-gradient(130% 86% at 50% -26%,rgba(146,188,248,.62),rgba(146,188,248,0) 58%),linear-gradient(180deg,rgba(255,255,255,.18),rgba(255,255,255,0) 42%);}
.svc-ico::after{content:"";position:absolute;inset:0;border-radius:20px;z-index:0;pointer-events:none;
  background:radial-gradient(circle at 50% 68%,rgba(63,134,224,.42),transparent 62%);}
.svc-ico svg{width:36px;height:36px;color:#dbe9ff;position:relative;z-index:1;stroke-width:1.6;
  filter:drop-shadow(0 2px 3px rgba(0,0,0,.55)) drop-shadow(0 0 7px rgba(83,150,235,.55));}
.svc-ico.sm{width:56px;height:56px;border-radius:16px;}
.svc-ico.sm::before{border-radius:15px;}
.svc-ico.sm::after{border-radius:16px;}
.svc-ico.sm svg{width:27px;height:27px;}

/* responsive shared */
@media(max-width:1000px){
  nav.menu{display:none;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media(max-width:640px){
  .wrap{padding:0 22px;}
  section.block{padding:72px 0;}
  .foot-grid{grid-template-columns:1fr;}
  .nav-cta .btn-ghost{display:none;}
}