:root{
  --navy:#0E1B33; --navy-soft:#1A2A4A;
  --primary:#2D5BD6; --primary-soft:#E7EEFC;
  --bg:#F4F6FA; --surface:#FFFFFF; --surface-alt:#F8FAFC;
  --text:#0F1B2D; --text-2:#5B6B85; --text-3:#94A3B8;
  --border:#E4E9F2;
  --ok:#10936B; --ok-s:#E1F4EC;
  --warn:#C77700; --warn-s:#FBEED5;
  --danger:#D33A36; --danger-s:#FBE4E3;
  --info:#2D5BD6; --info-s:#E7EEFC;
  --radius:14px; --radius-sm:9px;
  --shadow:0 1px 2px rgba(15,27,45,.04),0 8px 24px rgba(15,27,45,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans TC",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text); background:var(--bg); line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;border-radius:var(--radius-sm);
  padding:11px 20px;cursor:pointer;transition:.18s;white-space:nowrap;border:1px solid transparent}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:#2349b0}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{background:var(--surface);border-color:#cbd5e1}
.btn-lg{padding:14px 26px;font-size:16px}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--primary);background:var(--primary-soft);padding:5px 12px;border-radius:999px;margin-bottom:16px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;
  background:var(--primary);color:#fff}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:16px}
.brand-text small{font-size:11px;color:var(--text-2)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:15px;font-weight:500;color:var(--text-2)}
.nav-links a:hover{color:var(--text)}
.nav-links .nav-cta{color:#fff}
.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-burger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.2s}

/* Hero */
.hero{padding:64px 0 56px;background:
  radial-gradient(1200px 500px at 80% -10%,rgba(45,91,214,.10),transparent 60%),
  linear-gradient(180deg,#fff, var(--bg))}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-copy h1{font-size:clamp(30px,4.4vw,50px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.hero-copy .accent{color:var(--primary)}
.lead{margin:20px 0 28px;font-size:clamp(15px,1.6vw,18px);color:var(--text-2);max-width:36em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:36px;flex-wrap:wrap}
.hero-stats dt{font-size:30px;font-weight:700;color:var(--text)}
.hero-stats dd{font-size:14px;color:var(--text-2)}

.hero-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden}
.hc-head{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;
  border-bottom:1px solid var(--border);font-weight:700}
.hc-head a{font-size:13px;font-weight:600;color:var(--primary)}
.hc-list{list-style:none}
.hc-list li{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border)}
.hc-list li:last-child{border-bottom:0}
.hc-list div{flex:1;display:flex;flex-direction:column}
.hc-list strong{font-size:14px;font-weight:600}
.hc-list small{font-size:12px;color:var(--text-2)}
.dot{width:9px;height:9px;border-radius:50%;flex:none}
.dot.warn{background:var(--warn)} .dot.danger{background:var(--danger)}
.dot.info{background:var(--info)} .dot.ok{background:var(--ok)}
.tag{font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px}
.tag.warn{color:var(--warn);background:var(--warn-s)}
.tag.danger{color:var(--danger);background:var(--danger-s)}
.tag.info{color:var(--info);background:var(--info-s)}
.tag.ok{color:var(--ok);background:var(--ok-s)}

/* Sections */
.section{padding:72px 0}
.section-alt{background:var(--surface-alt)}
.section-head{max-width:680px;margin:0 auto 44px;text-align:center}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:12px;color:var(--text-2);font-size:16px}

/* Module grid */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.module-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;transition:.2s}
.module-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d3ddee}
.m-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;
  font-size:24px;background:var(--primary-soft);margin-bottom:16px}
.module-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.module-card p{font-size:14.5px;color:var(--text-2)}

/* Flow */
.flow-grid{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:f}
.flow-grid li{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 18px;display:flex;flex-direction:column;gap:8px}
.flow-grid li span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--navy);color:#fff;font-weight:700}
.flow-grid strong{font-size:16px}
.flow-grid small{font-size:13px;color:var(--text-2)}

/* AI */
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.ai-copy h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:18px}
.ai-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.ai-list li{position:relative;padding-left:30px;font-size:15.5px;color:var(--text-2)}
.ai-list li::before{content:"✦";position:absolute;left:0;top:0;color:var(--primary);font-weight:700}
.ai-chat{background:var(--navy);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:14px}
.bubble{padding:14px 16px;border-radius:14px;font-size:14.5px;max-width:90%}
.bubble.q{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}
.bubble.a{align-self:flex-start;background:#22335a;color:#dfe7f5;border-bottom-left-radius:4px}

/* Roles */
.role-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.role{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:20px;display:flex;flex-direction:column;gap:6px}
.role strong{font-size:16px}
.role small{font-size:13.5px;color:var(--text-2)}

/* CTA */
.cta{padding:80px 0}
.cta-inner{background:linear-gradient(120deg,var(--navy),#1c3666);border-radius:24px;
  padding:56px 32px;text-align:center;color:#fff}
.cta-inner h2{font-size:clamp(22px,3vw,32px);font-weight:700;max-width:24em;margin:0 auto}
.cta-inner p{margin:14px 0 28px;color:#bcd}
.cta-inner .btn-primary{background:#fff;color:var(--navy)}
.cta-inner .btn-primary:hover{background:#eef2fb}

/* Footer */
.site-footer{background:var(--navy);color:#9fb0cc;padding:40px 0}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.footer-inner strong{color:#fff;font-size:16px}
.footer-inner p{font-size:13px}
.copy{font-size:13px;color:#7e90b0}

/* ---------- RWD ---------- */
@media (max-width:980px){
  .hero-grid,.ai-grid{grid-template-columns:1fr;gap:32px}
  .module-grid,.role-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .nav-burger{display:flex}
  .nav-links{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;
    gap:0;background:#fff;border-bottom:1px solid var(--border);padding:8px 20px 18px;
    transform:translateY(-130%);transition:transform .25s ease;box-shadow:var(--shadow)}
  .nav-links a{padding:14px 4px;border-bottom:1px solid var(--border);font-size:16px}
  .nav-links .nav-cta{margin-top:12px;border-bottom:0;justify-content:center}
  .nav-toggle:checked ~ .nav-links{transform:translateY(0)}
  .nav-toggle:checked ~ .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle:checked ~ .nav-burger span:nth-child(2){opacity:0}
  .nav-toggle:checked ~ .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero{padding:40px 0}
  .section{padding:52px 0}
  .hero-stats{gap:24px}
  .cta-inner{padding:40px 20px}
}
@media (max-width:520px){
  .module-grid,.role-grid,.flow-grid{grid-template-columns:1fr}
  .hero-actions .btn{flex:1}
  .hero-stats{justify-content:space-between;width:100%}
  .hero-stats dt{font-size:26px}
}