:root{--ink:#121828;--muted:#697386;--line:#dfe5ed}
*{box-sizing:border-box}
html{background:#f7f9fc}
body{margin:0;color:var(--ink);background:radial-gradient(circle at 80% 0,rgba(91,92,226,.11),transparent 30%),radial-gradient(circle at 0 80%,rgba(32,184,135,.09),transparent 30%),#f7f9fc;font-family:"Manrope","Noto Sans TC",sans-serif}
header{display:flex;height:88px;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 clamp(25px,5vw,78px);background:rgba(255,255,255,.82);backdrop-filter:blur(20px)}
header img{width:175px}header span{color:#70798a;font:800 11px "Space Grotesk";letter-spacing:.14em}
main{padding:clamp(45px,5vw,80px) clamp(25px,5vw,78px) 70px}
.intro{display:grid;grid-template-columns:1.15fr .85fr;align-items:end;gap:50px;margin-bottom:52px}.intro small{color:#5b5ce2;font:800 12px "Space Grotesk";letter-spacing:.12em}.intro h1{margin:20px 0 0;font-size:clamp(52px,6vw,92px);line-height:1.02;letter-spacing:-.065em}.intro h1 em{color:#5b5ce2;font-style:normal}.intro p{max-width:660px;margin:0;color:var(--muted);font-size:20px;line-height:1.75}
.deck-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}.deck-grid a{display:flex;min-height:410px;flex-direction:column;border:1px solid var(--line);border-radius:26px;color:var(--ink);background:#fff;padding:28px;text-decoration:none;box-shadow:0 24px 60px rgba(50,65,88,.08);transition:.35s}.deck-grid a.is-featured{grid-column:1/-1;min-height:300px;background:linear-gradient(125deg,color-mix(in srgb,var(--a) 9%,white),#fff)}.deck-grid a:hover{border-color:var(--a);box-shadow:0 30px 70px color-mix(in srgb,var(--a) 16%,transparent);transform:translateY(-8px)}.deck-grid small{color:var(--a);font:800 11px "Space Grotesk";letter-spacing:.08em}.deck-grid h2{margin:60px 0 16px;font-size:34px}.deck-grid a.is-featured h2{margin-top:40px;font-size:44px}.deck-grid p{margin:0;color:var(--muted);font-size:15px;line-height:1.75}.deck-grid a.is-featured p{max-width:850px;font-size:17px}.deck-grid b{margin-top:auto;color:#8a93a2;font-size:12px}.deck-grid span{margin-top:14px;color:var(--a);font-size:14px;font-weight:900}
footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:28px clamp(25px,5vw,78px);color:#7d8797;font-size:13px}footer a{color:#5b5ce2;text-decoration:none;font-weight:900}
@media(max-width:1100px){.deck-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){header span{display:none}.intro{grid-template-columns:1fr}.intro h1{font-size:48px}.intro p{font-size:17px}.deck-grid{grid-template-columns:1fr}.deck-grid a,.deck-grid a.is-featured{min-height:330px}.deck-grid a.is-featured h2{font-size:36px}footer{align-items:flex-start;flex-direction:column;gap:12px}}

/* ── v3：用對話管理企業 ── */
.intro{margin-bottom:34px}
.intro h1{font-size:clamp(46px,5.6vw,84px)}
.demo{border:1px solid var(--line);border-radius:30px;background:#fff;padding:clamp(22px,3vw,40px);box-shadow:0 30px 80px rgba(50,65,88,.09);margin-bottom:40px}
.demo-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:22px}
.demo-head small{color:#5b5ce2;font:800 11px "Space Grotesk";letter-spacing:.14em}
.demo-head h2{margin:10px 0 0;font-size:clamp(26px,3vw,40px);letter-spacing:-.04em}
.demo-tabs{display:flex;flex-wrap:wrap;gap:8px}
.demo-tabs button{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#465064;padding:10px 14px;font:700 13px "Noto Sans TC";cursor:pointer;transition:.25s}
.demo-tabs button span{color:#9aa3b2;font:800 10px "Space Grotesk"}
.demo-tabs button:hover{border-color:#5b5ce2;color:#5b5ce2}
.demo-tabs button.is-active{background:#121828;border-color:#121828;color:#fff}
.demo-tabs button.is-active span{color:#8ee7ef}
.demo-stage{border-radius:22px;background:#f3f1ec;padding:clamp(16px,2.4vw,30px);min-height:420px}
.demo-panel{display:none;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:center}
.demo-panel.is-active{display:grid}
.demo-panel ul{margin:0;padding:0;list-style:none;display:grid;gap:14px}
.demo-panel li{border-left:2px solid #5b5ce2;padding-left:14px;color:#465064;font-size:14px;line-height:1.65}
.demo-panel li b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:60px}
.pillars article{border:1px solid var(--line);border-radius:22px;background:#fff;padding:26px;box-shadow:0 20px 50px rgba(50,65,88,.06)}
.pillars small{color:#5b5ce2;font:800 11px "Space Grotesk";letter-spacing:.12em}
.pillars h3{margin:16px 0 8px;font-size:22px;letter-spacing:-.03em}
.pillars p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.7}
.decks-head{margin-bottom:22px}
.decks-head small{color:#5b5ce2;font:800 11px "Space Grotesk";letter-spacing:.14em}
.decks-head h2{margin:10px 0 8px;font-size:clamp(30px,3.4vw,44px);letter-spacing:-.04em}
.decks-head p{max-width:720px;margin:0;color:var(--muted);font-size:16px;line-height:1.7}
.deck-grid{grid-template-columns:repeat(3,1fr)}
.deck-grid a{min-height:360px}
.deck-grid h2{margin:44px 0 14px;font-size:30px}
@media(max-width:1100px){.deck-grid{grid-template-columns:repeat(2,1fr)}.pillars{grid-template-columns:1fr}.demo-panel{grid-template-columns:1fr}}
@media(max-width:720px){.deck-grid{grid-template-columns:1fr}.demo-head{align-items:flex-start}.demo-tabs button{font-size:12px;padding:8px 11px}}