:root{
  --bg:#070A12;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.08);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.65);
  --line: rgba(255,255,255,.12);
  --pri:#7c5cff;
  --pri2:#22d3ee;
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --r: 18px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 20% 15%, rgba(124,92,255,.35), transparent 60%),
    radial-gradient(900px 600px at 80% 20%, rgba(34,211,238,.22), transparent 55%),
    radial-gradient(900px 600px at 50% 80%, rgba(255,255,255,.06), transparent 55%),
    var(--bg);
}

a{ color:inherit; text-decoration:none; }
.container{ width:min(1100px, 92vw); margin-inline:auto; }

.topbar{
  position:sticky; top:0; z-index:20;
  backdrop-filter: blur(10px);
  background: rgba(7,10,18,.55);
  border-bottom: 1px solid var(--line);
}
.topbar__inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand img{ display:block; }

.nav{ display:flex; gap:18px; align-items:center; }
.nav__link{
  color:var(--muted);
  padding:10px 12px;
  border-radius: 12px;
}
.nav__link:hover{ background: rgba(255,255,255,.06); color:var(--text); }
.nav__cta{
  padding:10px 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--pri), var(--pri2));
  color:#071018;
  font-weight: 700;
}

.navbtn{
  display:none;
  width:42px; height:42px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  border-radius: 14px;
}
.navbtn span{
  display:block; width:18px; height:2px; margin:4px auto;
  background: rgba(255,255,255,.8);
}

.mobile-nav{
  display:none;
  padding: 10px 4vw 16px;
  border-top: 1px solid var(--line);
}
.mobile-nav a{
  display:block;
  padding:12px 12px;
  border-radius: 14px;
  color: var(--text);
}
.mobile-nav a:hover{ background: rgba(255,255,255,.06); }

.hero{ padding: 46px 0 54px; }
.hero__grid{
  display:grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 22px;
  align-items:start;
}

.hero__card, .hero__side{
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,.03));
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 26px;
}

.badge{
  display:inline-flex;
  padding: 8px 12px;
  border: 1px solid rgba(124,92,255,.35);
  background: rgba(124,92,255,.12);
  border-radius: 999px;
  color: rgba(255,255,255,.88);
  font-size: 13px;
}

h1{
  margin: 14px 0 10px;
  font-size: clamp(28px, 3.2vw, 44px);
  letter-spacing: .2px;
}
.sub{ margin: 0 0 16px; color: var(--muted); line-height: 1.7; }

.cta{ display:flex; gap: 12px; flex-wrap:wrap; margin: 18px 0 16px; }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  font-weight: 750;
  transition: transform .08s ease, background .12s ease, border-color .12s ease;
  user-select:none;
}
.btn:active{ transform: translateY(1px); }
.btn--primary{
  background: linear-gradient(135deg, var(--pri), var(--pri2));
  color:#071018;
  border-color: transparent;
}
.btn--ghost{
  background: rgba(255,255,255,.04);
  color: rgba(255,255,255,.9);
}
.btn--ghost:hover{ background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.18); }
.btn--block{ width:100%; }

.trust{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 16px;
}
.trust__item{
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  border-radius: 16px;
  padding: 12px;
}
.trust__t{ font-weight: 800; font-size: 14px; }
.trust__d{ color: var(--muted); font-size: 13px; margin-top: 4px; }

.note{
  margin-top: 16px;
  color: rgba(255,255,255,.55);
  font-size: 12.5px;
  line-height: 1.6;
}

.hero__side h2{ margin: 0 0 8px; font-size: 18px; }
.muted{ margin: 0 0 14px; color: var(--muted); line-height: 1.6; }
.contact{ display:grid; gap: 10px; margin-top: 10px; }

.mini{
  margin-top: 14px;
  border-top: 1px solid rgba(255,255,255,.10);
  padding-top: 12px;
  display:grid;
  gap: 10px;
  color: rgba(255,255,255,.78);
  font-size: 13px;
}
.mini__row{ display:flex; justify-content:space-between; gap: 14px; }
.mini__row a{ color: rgba(34,211,238,.95); }

.footer{
  border-top: 1px solid var(--line);
  background: rgba(7,10,18,.55);
  padding: 22px 0 34px;
}
.footer__inner{
  display:flex; justify-content:space-between; align-items:center;
  gap: 14px; flex-wrap:wrap;
}
.footer__links{ display:flex; gap: 14px; color: var(--muted); }
.footer__links a:hover{ color: var(--text); }
.footer__copy{ color: rgba(255,255,255,.55); font-size: 13px; }

.to-top{
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 44px; height: 44px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.05);
  color: rgba(255,255,255,.9);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 900px){
  .hero__grid{ grid-template-columns: 1fr; }
  .trust{ grid-template-columns: 1fr; }
}
@media (max-width: 720px){
  .nav{ display:none; }
  .navbtn{ display:inline-block; }
  .mobile-nav{ display:block; }
}