@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700;900&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#07070f;
  --surf:#0e0e1c;
  --card:#12121f;
  --line:rgba(255,255,255,.07);
  --text:#dde1f0;
  --muted:rgba(221,225,240,.42);
  --p:#9f7aea;
  --b:#4fc3f7;
  --g:#43e39b;
  --o:#ffb347;
  --pk:#f472b6;
  --grad:linear-gradient(120deg,#9f7aea,#4fc3f7);
  --grad2:linear-gradient(120deg,#f472b6,#9f7aea);
}

html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans TC','PingFang TC','Microsoft JhengHei',sans-serif;
  background:var(--bg);color:var(--text);
  font-size:15px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
/* ── DOT GRID PATTERN (non-hero sections) ── */
.section,footer{
  background-image:
    radial-gradient(circle,rgba(159,122,234,.18) 1px,transparent 1px),
    radial-gradient(circle,rgba(79,195,247,.1) 1px,transparent 1px) !important;
  background-size:32px 32px,64px 64px !important;
  background-position:0 0,16px 16px !important;
}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--p);border-radius:3px}

/* ── HEADER ── */
header{
  position:fixed;top:0;left:0;right:0;z-index:999;
  background:rgba(7,7,15,.82);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);height:64px;
  display:flex;align-items:center;padding:0 5%;
  transition:box-shadow .3s;
}
header.scrolled{box-shadow:0 2px 28px rgba(0,0,0,.55)}
.header-inner{
  width:100%;max-width:1160px;margin:0 auto;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none}
.logo-mark{
  width:42px;height:42px;border-radius:10px;
  background:rgba(67,227,155,.08);
  border:1px solid rgba(67,227,155,.35);
  box-shadow:0 0 12px rgba(67,227,155,.15),inset 0 1px 0 rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:16px;color:#fff;flex-shrink:0;
  overflow:hidden;
}
.logo-zh{font-size:15px;font-weight:700;color:#fff;letter-spacing:.8px}
.logo-en{font-size:10.5px;color:rgba(67,227,155,.7);letter-spacing:2px;font-weight:400}
nav{display:flex;align-items:center;gap:6px}
nav a{
  text-decoration:none;font-size:13px;color:var(--g);
  padding:7px 16px;border-radius:8px;
  letter-spacing:1.2px;transition:color .25s,background .25s,border-color .25s,box-shadow .25s;
  white-space:nowrap;
  background:linear-gradient(180deg,rgba(67,227,155,.1) 0%,rgba(67,227,155,.04) 100%);
  border:1px solid rgba(67,227,155,.25);
  box-shadow:0 2px 8px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.08);
}
nav a:hover{
  color:#fff;
  background:linear-gradient(180deg,rgba(67,227,155,.2) 0%,rgba(67,227,155,.08) 100%);
  border-color:rgba(67,227,155,.5);
  box-shadow:0 4px 16px rgba(0,0,0,.5),0 0 12px rgba(67,227,155,.15),inset 0 1px 0 rgba(255,255,255,.12);
}
nav a.active{
  color:#fff;
  background:linear-gradient(180deg,rgba(67,227,155,.18) 0%,rgba(67,227,155,.07) 100%);
  border-color:rgba(67,227,155,.45);
  box-shadow:0 4px 16px rgba(0,0,0,.5),0 0 10px rgba(67,227,155,.12),inset 0 1px 0 rgba(255,255,255,.1);
}
.nav-join{
  background:linear-gradient(180deg,rgba(67,227,155,.1) 0%,rgba(67,227,155,.04) 100%)!important;
  color:var(--g)!important;
  font-weight:400!important;padding:7px 16px!important;
  border-radius:8px!important;margin-left:0;
  border:1px solid rgba(67,227,155,.25)!important;
  box-shadow:0 2px 8px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.08)!important;
}
.menu-toggle{
  display:none;flex-direction:column;justify-content:space-between;
  width:36px;height:36px;padding:8px 6px;
  background:rgba(67,227,155,.08);border:1px solid rgba(67,227,155,.3);
  border-radius:8px;cursor:pointer;
}
.menu-toggle span{
  display:block;height:2px;background:var(--g);border-radius:2px;
  transition:transform .25s,opacity .25s;
}
.menu-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ── HERO ── */
.hero{
  min-height:auto;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;
  padding:60px 6% 50px;position:relative;overflow:hidden;
  background:var(--bg);
}
#circuit-canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.hero-glow{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 55% 55% at 25% 45%,rgba(159,122,234,.17) 0%,transparent 60%),
    radial-gradient(ellipse 45% 55% at 78% 58%,rgba(79,195,247,.12) 0%,transparent 60%),
    radial-gradient(ellipse 30% 30% at 50% 5%, rgba(67,227,155,.07) 0%,transparent 55%);
  animation:hglow 9s ease-in-out infinite alternate;
}
@keyframes hglow{from{opacity:.7}to{opacity:1}}
.hero-inner{position:relative;z-index:1;max-width:780px}

.hero-chip{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid rgba(159,122,234,.35);background:rgba(159,122,234,.09);
  border-radius:50px;padding:6px 18px;
  font-size:11px;letter-spacing:3px;color:var(--p);margin-bottom:28px;
}
.chip-dot{width:7px;height:7px;background:var(--g);border-radius:50%;animation:blink 2.2s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.2}}

.hero h1,.page-hero h1{
  font-size:clamp(34px,5.5vw,66px);font-weight:900;
  line-height:1.12;letter-spacing:-.5px;margin-bottom:16px;
}
.grad{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.grad2{background:var(--grad2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-en{font-size:12px;letter-spacing:4px;color:var(--muted);margin-bottom:22px}
.hero-desc{font-size:16px;color:rgba(221,225,240,.52);line-height:1.85;margin-bottom:44px;max-width:540px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}

/* ── BUTTONS ── */
.btn{
  display:inline-block;padding:13px 30px;border-radius:50px;
  font-size:14px;font-weight:700;text-decoration:none;
  letter-spacing:.5px;transition:transform .2s,opacity .2s;
  cursor:pointer;border:none;font-family:inherit;
}
.btn:hover{transform:translateY(-2px)}
.btn-fill{background:var(--grad);color:#fff}
.btn-fill:hover{opacity:.88}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:rgba(159,122,234,.4)}

/* ── SECTION ── */
.section{padding:96px 6%}
.section-inner{max-width:1160px;margin:0 auto}
.sec-tag{display:inline-block;font-size:11px;letter-spacing:3.5px;color:var(--p);font-weight:700;text-transform:uppercase;margin-bottom:12px}
.sec-h{font-size:clamp(24px,3vw,38px);font-weight:900;line-height:1.2;margin-bottom:14px}
.sec-sub{font-size:15px;color:var(--muted);max-width:520px;line-height:1.85}
.divider{width:48px;height:3px;background:var(--grad);border-radius:2px;margin:16px 0 48px}

/* ── FOOTER ── */
footer{background:#06060e;border-top:1px solid var(--line);padding:52px 5% 34px}
.footer-inner{max-width:1160px;margin:0 auto}
.footer-top{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:48px;padding-bottom:38px;border-bottom:1px solid var(--line);margin-bottom:26px;
}
.footer-brand p{font-size:13px;color:var(--muted);max-width:240px;line-height:1.75;margin-top:14px}
.footer-nav-group{display:flex;gap:52px}
.fng h4{font-size:11px;font-weight:700;letter-spacing:2.5px;color:rgba(255,255,255,.25);margin-bottom:16px;text-transform:uppercase}
.fng ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.fng ul li a{text-decoration:none;font-size:14px;color:rgba(255,255,255,.42);transition:color .2s}
.fng ul li a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:rgba(255,255,255,.18);flex-wrap:wrap;gap:8px}

/* ── CARDS ── */
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
.card:hover{border-color:rgba(159,122,234,.35);transition:border-color .25s}


/* ── SCROLL REVEAL ── */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .65s ease,transform .65s ease}
.reveal.in{opacity:1;transform:none}

/* ── RESPONSIVE ── */
@media(max-width:860px){
  .header-inner{grid-template-columns:1fr auto}
  .menu-toggle{display:flex}
  nav{
    display:none;position:fixed;top:64px;left:0;right:0;
    flex-direction:column;padding:12px 5% 16px;gap:8px;
    background:rgba(9,16,26,.97);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(67,227,155,.2);z-index:998;
  }
  nav.open{display:flex}
  nav a{display:flex!important;align-items:center}
  nav a::after{display:none}
  .footer-top{flex-direction:column}
  .footer-nav-group{flex-wrap:wrap;gap:28px}
}