:root{
  --bg:#070812;
  --card:#0f1720;
  --muted:#9aa6b2;
  --accent:linear-gradient(90deg,#00d2ff,#3a7bd5);
  --glow:#00d2ff;
  --glass: rgba(255,255,255,0.04);
  --radius:14px;
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, 'Helvetica Neue', 'Noto Sans TC', Arial;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: var(--bg);
  color:#e6eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
#bg-canvas{
  position:fixed;
  top:0;
  left:0;
  z-index:-1;
  pointer-events:none;
}
.container{max-width:1100px;margin:0 auto;padding:2rem}
.nav-backdrop{position:fixed;top:0;left:0;right:0;z-index:60;backdrop-filter: blur(6px);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:0.75rem 1rem}
.brand{display:flex;align-items:center;gap:0.8rem}
.logo{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,#00d2ff,#3a7bd5);box-shadow:0 6px 20px rgba(58,123,213,0.18)}
.names .ch{font-weight:700}
.names .en{font-size:0.8rem;color:var(--muted);margin-top:2px}
.menu{display:flex;gap:1rem;align-items:center}
.menu a{color:var(--muted);text-decoration:none;padding:0.45rem 0.65rem;border-radius:8px}
.menu a.primary{background:linear-gradient(90deg,#00d2ff22,#3a7bd522);color:#dff6ff}
.language-select{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted);padding:0.45rem 0.65rem;border-radius:8px;font-family:inherit}
.language-select:focus{outline:none;border-color:var(--glow)}

.hero{min-height:68vh;display:grid;align-items:center;position:relative;padding-top:84px;overflow:hidden}
.hero .glow{position:absolute;inset:0;filter:blur(120px);opacity:0.7;background:radial-gradient(circle at 20% 30%, rgba(0,210,255,0.12), transparent 10%), radial-gradient(circle at 80% 70%, rgba(58,123,213,0.08), transparent 10%)}
.hero-inner{position:relative;z-index:2;padding:4rem 1rem}
.hero h1{font-size:clamp(2rem,6vw,3.6rem);margin:0 0 0.6rem;letter-spacing:-0.02em}
.tag{color:var(--muted);max-width:720px}
.hero-actions{margin-top:1.4rem;display:flex;gap:0.8rem}
.btn{background:var(--glow);color:#042033;padding:0.7rem 1rem;border-radius:10px;text-decoration:none;font-weight:600}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted)}

.section{padding:4rem 0}
.section.alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,0.01));}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem}
.card{background:var(--glass);padding:1.2rem;border-radius:12px;box-shadow:0 6px 30px rgba(2,6,23,0.6);backdrop-filter: blur(6px)}
.card h3{margin:0 0 0.6rem}

.contact-form{display:grid;gap:0.7rem;max-width:720px}
.contact-form input,.contact-form textarea{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:0.75rem;border-radius:10px;color:inherit}
.contact-form .actions{display:flex;gap:0.6rem;align-items:center}

.footer{border-top:1px solid rgba(255,255,255,0.03);margin-top:2rem; text-align: center; font-size: 0.9rem;}
.liame{padding:0rem 0; margin-top: 0rem;text-align: center;font-size: 1.2rem;}
.footer-links{padding: 0.2rem 0;margin-top: 0.2rem; color:#ffffff; text-align: center; font-size:0.9rem;}
.footer-links a {
    color: #ffffff;        /* 固定白色 */
      text-decoration: none; /* 移除底線，可選 */
      }

.footer-links a:hover {
        color: #ffffff;        /* 滑鼠移上去仍保持白色 */
        }
.small{color:var(--muted);font-size:0.9rem}

@media(max-width:820px){
  .nav-backdrop{position:fixed}
}

@media(max-width:768px){
  .hero{min-height:50vh;padding-top:64px}
  .hero-inner{padding:2rem 1rem}
  .hero h1{font-size:clamp(1.8rem,5vw,3rem)}
  .section{padding:3rem 0}
  .grid{grid-template-columns:1fr}
}

@media(max-width:520px){
  .hero h1{font-size:2rem}
  .container{padding:1rem}
  .hero-actions{flex-direction:column;gap:0.6rem}
  .btn{width:100%;text-align:center}
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
  opacity: 0;
}

/* Device-specific adjustments */
@media(max-width:768px){
  .mobile .hero{min-height:60vh}
  .mobile .section{padding:2rem 0}
}

@media(min-width:769px) and (max-width:1024px){
  .tablet .grid{grid-template-columns:repeat(2,1fr)}
}

@media(min-width:1025px){
  .desktop .hero{min-height:80vh}
}