/* ===== ASTC Glossary — Shared Styles ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#111827;--bg-card:#1f2937;--bg-elevated:#374151;--border:#374151;
  --text:#f3f4f6;--text-secondary:#9ca3af;--text-muted:#6b7280;
  --blue:#3b82f6;--gold:#f59e0b;--teal:#2bb5b8;
  --green:#22c55e;--purple:#a855f7;--red:#ef4444;
  --radius:12px;--max-w:1200px;
}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:'Noto Sans TC','Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* ===== Navbar ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;transition:transform .3s,background .3s,box-shadow .3s}
.navbar.scrolled{background:rgba(17,24,39,.95);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-w);margin:0 auto;padding:0 24px}
.nav-logo{font-size:18px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:8px}
.nav-logo img{margin-top:3px}
.nav-logo .teal{color:var(--teal)}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{color:var(--text-secondary);font-size:14px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--gold)}
.nav-links .nav-cta{background:var(--gold);color:#111;padding:8px 20px;border-radius:8px;font-weight:700;font-size:14px;transition:all .2s}
.nav-links .nav-cta:hover{background:#d97706;color:#111;transform:translateY(-1px)}
.nav-hamburger{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* ===== Sections ===== */
section{padding:80px 0}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:clamp(24px,3.5vw,36px);font-weight:800;margin-bottom:12px}
.section-header p{font-size:16px;color:var(--text-secondary);max-width:600px;margin:0 auto}
.section-label{display:inline-block;font-size:13px;font-weight:700;color:var(--gold);margin-bottom:12px;text-transform:uppercase;letter-spacing:1px}

/* ===== Buttons ===== */
.btn-primary{display:inline-flex;align-items:center;gap:6px;padding:14px 28px;border-radius:10px;background:var(--gold);color:#111;font-weight:700;font-size:16px;border:none;cursor:pointer;transition:all .2s}
.btn-primary:hover{background:#d97706;transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,158,11,.25)}
.btn-secondary{display:inline-flex;align-items:center;gap:6px;padding:14px 28px;border-radius:10px;background:transparent;color:var(--text);font-weight:600;font-size:16px;border:1px solid var(--border);cursor:pointer;transition:all .2s}
.btn-secondary:hover{border-color:var(--text-secondary);background:var(--bg-card)}

/* ===== Page Hero (sub-pages) ===== */
.page-hero{padding:140px 0 60px;text-align:center;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 50% 50%,rgba(59,130,246,.06) 0%,transparent 60%)}
.page-hero h1{font-size:clamp(28px,4vw,44px);font-weight:900;margin-bottom:12px;position:relative}
.page-hero h1 .gold{color:var(--gold)}
.page-hero p{font-size:17px;color:var(--text-secondary);max-width:600px;margin:0 auto;position:relative}
.page-hero .breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:16px;position:relative}
.page-hero .breadcrumb a{color:var(--text-secondary)}

/* ===== Cards ===== */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .3s}
.card:hover{border-color:#475569;transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.3)}

/* ===== Footer ===== */
.footer{border-top:1px solid var(--border);padding:48px 0 32px}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap;max-width:var(--max-w);margin:0 auto;padding:0 24px}
.footer-brand{max-width:300px}
.footer-brand .logo{font-size:18px;font-weight:800;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.footer-brand .logo .teal{color:var(--teal)}
.footer-brand p{font-size:13px;color:var(--text-muted);line-height:1.6}
.footer-links h4{font-size:14px;font-weight:700;margin-bottom:12px;color:var(--text-secondary)}
.footer-links a{display:block;font-size:13px;color:var(--text-muted);margin-bottom:8px;transition:color .2s}
.footer-links a:hover{color:var(--text)}
.footer-social{display:flex;gap:12px;margin-top:16px}
.footer-social a{width:36px;height:36px;border-radius:8px;background:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .2s}
.footer-social a:hover{border-color:var(--blue);background:rgba(59,130,246,.1)}
.footer-copy{text-align:center;padding-top:24px;margin-top:24px;border-top:1px solid var(--border);font-size:12px;color:var(--text-muted);max-width:var(--max-w);margin-left:auto;margin-right:auto;padding-left:24px;padding-right:24px}

/* ===== Back to Top ===== */
.top-btn{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;border:none;cursor:pointer;background:var(--blue);color:#fff;font-size:20px;display:none;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(59,130,246,.3);transition:all .2s;z-index:50}
.top-btn.show{display:flex}
.top-btn:hover{transform:translateY(-2px)}

/* ===== Scroll Reveal ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Mobile Menu ===== */
.mobile-menu{display:none;position:fixed;inset:0;background:rgba(17,24,39,.98);z-index:200;flex-direction:column;align-items:center;justify-content:center;gap:24px}
.mobile-menu.open{display:flex}
.mobile-menu a{font-size:20px;font-weight:600;color:var(--text)}
.mobile-menu .close-btn{position:absolute;top:20px;right:20px;background:none;border:none;color:var(--text);font-size:28px;cursor:pointer}

/* ===== RWD ===== */
@media(max-width:768px){
  .nav-links{display:none}
  .nav-hamburger{display:block}
  .page-hero{padding:120px 0 40px}
  .page-hero h1{font-size:28px}
  .footer-inner{flex-direction:column}
}