/* AI財經先行者 — shared design system for the nSchool academy hub + sub-academies */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@700;900&display=swap');
:root{
  --bg:#F5F3EF; --bg2:#FAF8F5; --card:#FFF; --line:#E8E5DF;
  --ink:#16181D; --muted:#6B6E76;
  --brand:#3B7DD8; --brand2:#22915A; --gold:#C6993E; --gold2:#D4A843; --green:#22915A;
  --radius:16px; --maxw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;
  font-size:17px}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:76px 0}
h2{font-size:clamp(26px,4vw,36px);margin-bottom:26px;line-height:1.25;font-weight:800}
h3{font-size:20px;margin-bottom:8px}
p{color:var(--muted);font-size:16.5px}
.center{text-align:center}
.placeholder{color:var(--gold2);font-weight:600}

/* top nav */
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.82);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:58px;gap:12px}
.nav .brand{font-weight:800;letter-spacing:.02em;color:var(--ink);text-decoration:none;font-size:18px;white-space:nowrap}
.nav .brand b{color:var(--brand2)}
.nav .links{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.nav .links a{font-size:14.5px;color:var(--muted);text-decoration:none;padding:7px 11px;border-radius:8px}
.nav .links a:hover,.nav .links a.active{color:var(--ink);background:var(--card)}

.eyebrow{display:inline-block;font-weight:700;letter-spacing:.12em;color:var(--brand2);
  background:rgba(34,145,90,.1);border:1px solid rgba(34,145,90,.35);
  padding:7px 16px;border-radius:999px;font-size:15px;margin-bottom:20px}
.btn{display:inline-block;background:linear-gradient(135deg,var(--brand2),var(--brand));
  color:#fff;font-weight:800;text-decoration:none;padding:16px 34px;border-radius:999px;
  font-size:18px;border:none;cursor:pointer;transition:transform .15s,box-shadow .15s;
  box-shadow:0 8px 32px rgba(34,145,90,.18)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(34,145,90,.26)}
.btn.gold{background:linear-gradient(135deg,#D4A843,#B8862D);color:#fff;
  box-shadow:0 8px 32px rgba(198,153,62,.20)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--ink);box-shadow:none}
.micro{margin-top:14px;font-size:14px;color:var(--muted)}

.hero{background:radial-gradient(1200px 500px at 50% -10%,rgba(91,139,255,.22),transparent),
  linear-gradient(180deg,var(--bg2),var(--bg));text-align:center;padding:72px 0 52px}
.hero h1{font-size:clamp(32px,5.4vw,52px);line-height:1.16;margin:0 0 20px;font-weight:800}
.hero .sub{font-size:clamp(17px,2.4vw,20px);max-width:720px;margin:0 auto 32px;color:var(--muted);line-height:1.7}

.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:880px){.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:780px){.g2,.g3{grid-template-columns:1fr}}
@media(max-width:520px){.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{color:var(--ink)}
.alt{background:var(--bg2)}

/* academy card (hub) */
.acad{display:flex;flex-direction:column;gap:10px;text-decoration:none;position:relative;
  transition:transform .15s,border-color .15s}
.acad:hover{transform:translateY(-3px);border-color:var(--brand2)}
.acad .ico{font-size:30px}
.acad .tag{position:absolute;top:16px;right:16px;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px}
.tag-live{background:rgba(34,145,90,.12);color:var(--brand2);border:1px solid rgba(34,145,90,.35)}
.tag-soon{background:rgba(159,176,216,.12);color:var(--muted);border:1px solid var(--line)}
.acad .go{color:var(--brand2);font-weight:700;font-size:14px;margin-top:auto}

ul.checks{list-style:none;display:grid;gap:12px}
ul.checks li{padding-left:32px;position:relative;color:var(--ink)}
ul.checks li::before{content:"✓";position:absolute;left:0;top:0;color:#fff;
  background:var(--green);width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  font-weight:900;font-size:13px}

.stats{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;margin-top:8px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 26px;min-width:170px}
.stat .n{font-size:28px;font-weight:900}
.stat .l{font-size:13px;color:var(--muted)}

.steps .step{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-bottom:1px dashed var(--line)}
.steps .step:last-child{border-bottom:none}
.steps .num{flex:0 0 40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--brand2),var(--brand));
  color:#fff;font-weight:900;display:grid;place-items:center;font-size:18px}

details.faq{border-bottom:1px solid var(--line);padding:16px 0}
details.faq summary{cursor:pointer;font-weight:700;color:var(--ink);list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq p{margin-top:10px}

footer{padding:40px 0;border-top:1px solid var(--line);background:#FFF}
footer p{font-size:13px;text-align:center;color:var(--muted)}

/* ===== 知識衛星風 課程卡 (sat.cool style cinematic course cards) ===== */
.courses{display:grid;gap:22px;margin-top:6px}
.xcard{position:relative;display:block;border-radius:20px;overflow:hidden;text-decoration:none;
  min-height:300px;background:#0b1224;border:1px solid var(--line);
  transition:transform .2s,border-color .2s,box-shadow .2s}
.xcard:hover{transform:translateY(-4px);border-color:rgba(247,166,0,.6);box-shadow:0 30px 70px rgba(0,0,0,.55)}
.xcard .ph{position:absolute;inset:0;background-size:cover;background-position:right top;background-repeat:no-repeat}
.xcard .shade{position:absolute;inset:0;
  background:linear-gradient(90deg,#070b16 0%,rgba(7,11,22,.92) 38%,rgba(7,11,22,.5) 60%,rgba(7,11,22,.12) 100%)}
.xcard .body{position:relative;z-index:2;max-width:58%;padding:34px 32px}
.xcard .xcat{font-size:13px;letter-spacing:.14em;font-weight:800;color:var(--gold2);margin-bottom:13px}
.xcard .xtitle{font-size:clamp(25px,3.3vw,37px);font-weight:900;color:#fff;line-height:1.16;margin-bottom:14px;text-shadow:0 2px 24px rgba(0,0,0,.6)}
.xcard .xdesc{font-size:15.5px;color:#c7d2ea;margin-bottom:18px;max-width:440px;line-height:1.7}
.xcard .xfmt{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:#fff;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:5px 13px;border-radius:999px;margin-bottom:20px}
.xcard .xmeta{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.xcard .xprice{font-size:25px;font-weight:900;color:#fff}
.xcard .xorig{font-size:15px;color:#8595bd;text-decoration:line-through}
.xcard .xstud{font-size:13.5px;color:var(--muted)}
.xcard .xbadge{position:absolute;top:18px;right:18px;z-index:3;font-size:12.5px;font-weight:800;
  padding:6px 14px;border-radius:999px;background:#E74C3C;color:#fff;box-shadow:0 8px 22px rgba(231,76,60,.45)}
.xcard .xbadge.soon{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1200}
.xcard .xteacher{position:absolute;right:20px;bottom:16px;z-index:3;font-size:13px;color:#dbe4ff;font-weight:600;
  background:rgba(7,11,22,.5);padding:4px 12px;border-radius:999px;backdrop-filter:blur(4px)}
@media(max-width:880px){
  .xcard{min-height:380px;display:flex;flex-direction:column;justify-content:flex-end}
  .xcard .ph{background-position:right top}
  .xcard .shade{background:linear-gradient(0deg,#070b16 14%,rgba(7,11,22,.86) 48%,rgba(7,11,22,.3) 100%)}
  .xcard .body{max-width:100%}
  .xcard .xteacher{display:none}
}

/* ===== mobile-first hardening (dark hub + academies) ===== */
html{overflow-x:hidden}
img,video,iframe{max-width:100%}
@media(max-width:640px){
  section{padding:46px 0}
  .wrap{padding:0 16px}
  .nav .wrap{height:auto;min-height:56px;flex-wrap:wrap;padding:9px 14px;gap:8px}
  .nav .brand{font-size:17px}
  .nav .links{width:100%;justify-content:flex-start;gap:4px;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav .links::-webkit-scrollbar{display:none}
  .nav .links a{font-size:14px;padding:6px 9px;white-space:nowrap;flex:0 0 auto}
  .hero2{min-height:auto}
  .hero2-inner{padding:44px 2px;gap:16px}
  .hero2-title{font-size:clamp(34px,9vw,52px)}
  .hero2-sub{font-size:clamp(18px,5vw,22px)}
  .hero2-body{font-size:16px}
  .hero{padding:64px 0 48px}
  .btn{padding:14px 26px;font-size:16px}
  h2{font-size:clamp(24px,7vw,32px)}
  .stat{min-width:140px;flex:1 1 40%}
  .xcard{min-height:340px}
  .xcard .body{padding:22px 18px;max-width:100%}
  .xcard .xtitle{font-size:clamp(23px,7.4vw,30px)}
  .xcard .xdesc{font-size:14.5px}
}
@media(max-width:560px){
  .wall{grid-template-columns:repeat(4,1fr)}
  .grid.g3,.grid.g4,.grid.g2{grid-template-columns:1fr}
}

/* ===== 金色精品點綴（對齊工具 theme.css）Kevin light 2026-06-26 ===== */
h1,h2,h3,.hero2-title,.xtitle,.acad h3{font-family:"Noto Serif TC",serif;letter-spacing:.01em}
h2{background:linear-gradient(92deg,#16181D 10%,var(--gold) 90%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.center h2{background:linear-gradient(92deg,var(--gold),#16181D,var(--gold));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.card{border-top:1px solid rgba(198,153,62,.30)}
.eyebrow{color:var(--gold);background:rgba(198,153,62,.09);border-color:rgba(198,153,62,.38)}
.nav .brand b{color:var(--gold)}
.acad:hover{border-color:rgba(198,153,62,.55)}
.acad .go{color:var(--gold)}
.stat .n{background:linear-gradient(180deg,#D4A843,#B8862D);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}