/* AJ AI MARKETING — 對外官網樣式（home / services / checkup 共用） */
:root{
  --ground:#F1F4F3; --card:#FFFFFF; --raised:#F7F9F8;
  --ink:#212927; --ink-2:#4B5551; --muted:#79837F;
  --line:#DCE3E0; --line-2:#C6CFCB;
  --brand:#7E5F16; --brand-ink:#FFFFFF; --brand-btn:#7E5F16; --brand-soft:#F1E9D6;
  --alert:#A03F2B; --alert-soft:#F6E6E1;
  --shadow-1:0 1px 2px rgba(33,41,39,.05);
  --shadow-2:0 1px 2px rgba(33,41,39,.04),0 10px 28px -16px rgba(33,41,39,.16);
  --r:4px; --r-card:7px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ground:#0F1312; --card:#171C1A; --raised:#1E2422;
    --ink:#E7EBE8; --ink-2:#BFC7C3; --muted:#8B958F;
    --line:#28302D; --line-2:#39423E;
    --brand:#D6B063; --brand-ink:#171C1A; --brand-btn:#8A6A1C; --brand-soft:#2A2416;
    --alert:#E29279; --alert-soft:#2D1E19;
    --shadow-1:0 1px 2px rgba(0,0,0,.45);
    --shadow-2:0 1px 2px rgba(0,0,0,.4),0 10px 28px -16px rgba(0,0,0,.7);
  }
}
:root[data-theme="dark"]{
  --ground:#0F1312; --card:#171C1A; --raised:#1E2422;
  --ink:#E7EBE8; --ink-2:#BFC7C3; --muted:#8B958F;
  --line:#28302D; --line-2:#39423E;
  --brand:#D6B063; --brand-ink:#171C1A; --brand-btn:#8A6A1C; --brand-soft:#2A2416;
  --alert:#E29279; --alert-soft:#2D1E19;
  --shadow-1:0 1px 2px rgba(0,0,0,.45);
  --shadow-2:0 1px 2px rgba(0,0,0,.4),0 10px 28px -16px rgba(0,0,0,.7);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
  font-size:17px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.serif{font-family:"Noto Serif TC",Georgia,serif}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums}
h1,h2,h3{font-family:"Noto Serif TC",Georgia,serif;text-wrap:balance;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.24;font-weight:700}
h2{font-size:clamp(23px,2.8vw,34px);line-height:1.35;font-weight:700}
h3{font-size:19px;line-height:1.5;font-weight:600}
p{margin:0;color:var(--ink-2)}
a{color:var(--brand)}
.label{font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);font-weight:500}

/* header */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--ground) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:26px;height:64px}
.brand{font-family:"Noto Serif TC",serif;font-weight:700;font-size:17px;color:var(--ink);text-decoration:none;letter-spacing:.02em;white-space:nowrap}
.brand span{color:var(--brand)}
.nav .links{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav .links a{color:var(--ink-2);text-decoration:none;font-size:15px}
.nav .links a:hover{color:var(--brand)}
.nav .links a.btn-primary,.nav .links a.btn-primary:hover{color:#FFFFFF}
@media(max-width:720px){.nav .links a.hide-sm{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:var(--r);
  font-size:16px;font-weight:700;text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .12s,box-shadow .12s}
.btn-primary{background:var(--brand-btn);color:#FFFFFF;box-shadow:var(--shadow-1)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:2px}

/* cards & sections */
section{padding:76px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1)}
.sec-head{max-width:60ch;margin-bottom:34px;display:flex;flex-direction:column;gap:10px}

footer{border-top:1px solid var(--line);padding:38px 0 56px;color:var(--muted);font-size:14px;background:var(--card)}
footer a{color:var(--ink-2);text-decoration:none}
footer a:hover{color:var(--brand)}
.foot-row{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center}