/* ==================================================
   Pillar Detail Page — Shared Styles
   台灣雲商書院 · 五大版圖分頁
   ================================================== */
:root{
  --paper:#f4ebd9;
  --paper-2:#ebdfc4;
  --ink:#1a1410;
  --ink-soft:#3a2e24;
  --vermilion:#d94a2b;
  --indigo:#2f3e6f;
  --jade:#4a6b52;
  --gold:#c8a94a;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans TC",system-ui,sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

/* --- Top bar --- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(244,235,217,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(26,20,16,.12);
  padding:14px 40px;
  display:flex;justify-content:space-between;align-items:center;
}
.topbar .home-link{
  font-family:"JetBrains Mono",monospace;
  font-size:12px;letter-spacing:2px;text-decoration:none;color:var(--ink);
  padding:8px 14px;border:1px solid var(--ink);
  transition:all .2s;
}
.topbar .home-link:hover{background:var(--ink);color:var(--paper)}
.topbar .brand{font-family:"Noto Serif TC",serif;font-weight:700;font-size:15px;letter-spacing:2px}
.topbar .brand em{font-family:"Fraunces",serif;font-style:italic;font-size:11px;color:var(--vermilion);margin-left:6px}

/* --- Breadcrumb --- */
.crumbs{
  padding:24px 40px 0;
  font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:2px;
  color:var(--ink-soft);
}
.crumbs a{color:var(--vermilion);text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* --- Hero --- */
.pd-hero{
  padding:70px 40px 90px;
  max-width:1200px;margin:0 auto;
  position:relative;
}
.pd-hero .num{
  font-family:"JetBrains Mono",monospace;
  font-size:14px;color:var(--vermilion);letter-spacing:4px;margin-bottom:24px;
}
.pd-hero h1{
  font-family:"Noto Serif TC",serif;
  font-size:clamp(48px,7vw,96px);
  line-height:1.05;font-weight:700;letter-spacing:-1px;
  margin-bottom:26px;
}
.pd-hero h1 em{color:var(--vermilion);font-style:normal}
.pd-hero .sub{
  font-family:"Fraunces",serif;font-style:italic;
  font-size:22px;color:var(--ink-soft);margin-bottom:32px;
}
.pd-hero .lede{
  max-width:700px;font-size:17px;line-height:1.9;color:var(--ink-soft);
}

/* Hero decorative seal */
.seal{
  position:absolute;right:60px;top:80px;
  width:110px;height:110px;background:var(--vermilion);color:var(--paper);
  display:flex;align-items:center;justify-content:center;
  font-family:"Noto Serif TC",serif;font-size:22px;font-weight:700;
  transform:rotate(6deg);box-shadow:4px 4px 0 var(--ink);
  letter-spacing:2px;line-height:1.2;text-align:center;
}
@media (max-width:820px){.seal{display:none}}

/* --- Section base --- */
.pd-section{padding:80px 40px;max-width:1200px;margin:0 auto}
.pd-section.alt{background:var(--paper-2);max-width:none;padding:80px 40px}
.pd-section.alt > .inner{max-width:1200px;margin:0 auto}
.pd-section.dark{background:var(--ink);color:var(--paper);max-width:none;padding:80px 40px}
.pd-section.dark > .inner{max-width:1200px;margin:0 auto}
.pd-section.dark h2{color:var(--paper)}
.pd-section.dark .kicker{color:var(--gold)}

.kicker{
  font-family:"JetBrains Mono",monospace;
  font-size:12px;letter-spacing:3px;color:var(--vermilion);
  padding-bottom:14px;border-bottom:1px solid currentColor;display:inline-block;margin-bottom:32px;
}
.pd-section h2{
  font-family:"Noto Serif TC",serif;
  font-size:clamp(32px,4vw,52px);line-height:1.15;font-weight:700;
  margin-bottom:24px;letter-spacing:-.5px;
}
.pd-section h2 em{color:var(--vermilion);font-style:normal}
.pd-section p.para{font-size:16px;line-height:1.9;color:var(--ink-soft);max-width:800px;margin-bottom:20px}
.pd-section.dark p.para{color:rgba(244,235,217,.75)}

/* --- Feature grid --- */
.feat-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;margin-top:40px;
}
.feat{
  border:1.5px solid currentColor;padding:32px 28px;
  background:var(--paper);color:var(--ink);
  transition:transform .25s,box-shadow .25s;
}
.pd-section.dark .feat{background:transparent;color:var(--paper);border-color:rgba(244,235,217,.3)}
.feat:hover{transform:translate(-3px,-3px);box-shadow:6px 6px 0 var(--ink)}
.pd-section.dark .feat:hover{box-shadow:6px 6px 0 var(--vermilion)}
.feat .icon{
  font-size:32px;color:var(--vermilion);margin-bottom:16px;
  display:inline-block;
}
.feat h3{
  font-family:"Noto Serif TC",serif;font-size:22px;font-weight:700;
  margin-bottom:12px;letter-spacing:-.3px;
}
.feat h3 small{
  display:block;font-family:"Fraunces",serif;font-style:italic;
  font-size:12px;color:var(--ink-soft);font-weight:400;margin-top:4px;letter-spacing:1px;
}
.pd-section.dark .feat h3 small{color:rgba(244,235,217,.6)}
.feat p{font-size:14px;line-height:1.75;color:var(--ink-soft)}
.pd-section.dark .feat p{color:rgba(244,235,217,.75)}

/* --- Cases (case studies) --- */
.cases{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;margin-top:36px}
.case{
  background:var(--paper);border-left:4px solid var(--vermilion);
  padding:28px 30px;
  box-shadow:4px 4px 0 rgba(26,20,16,.08);
}
.case .tag{
  font-family:"JetBrains Mono",monospace;font-size:10px;letter-spacing:2px;
  color:var(--vermilion);margin-bottom:12px;
}
.case h4{
  font-family:"Noto Serif TC",serif;font-size:20px;margin-bottom:10px;line-height:1.35;
}
.case p{font-size:14px;color:var(--ink-soft);line-height:1.75;margin-bottom:14px}
.case .kpis{
  display:flex;gap:20px;padding-top:14px;
  border-top:1px dashed rgba(26,20,16,.25);
}
.case .kpi{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--ink-soft)}
.case .kpi strong{display:block;font-size:22px;color:var(--vermilion);margin-bottom:2px}

/* --- Roadmap --- */
.timeline{
  position:relative;padding:20px 0 20px 40px;margin-top:32px;
  border-left:2px solid var(--vermilion);
}
.timeline .step{position:relative;padding-bottom:36px}
.timeline .step::before{
  content:"";position:absolute;left:-49px;top:6px;
  width:16px;height:16px;background:var(--vermilion);border:3px solid var(--paper);border-radius:50%;
}
.pd-section.dark .timeline .step::before{border-color:var(--ink)}
.timeline .when{
  font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:2px;
  color:var(--vermilion);margin-bottom:6px;
}
.timeline h4{
  font-family:"Noto Serif TC",serif;font-size:20px;margin-bottom:8px;
}
.timeline p{font-size:14px;color:var(--ink-soft);line-height:1.75}
.pd-section.dark .timeline p{color:rgba(244,235,217,.7)}

/* --- Stats strip --- */
.stat-strip{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:0;
  border-top:2px solid var(--ink);border-bottom:2px solid var(--ink);
  margin-top:48px;
}
.stat{
  padding:26px 20px;text-align:left;border-right:1px solid rgba(26,20,16,.2);
}
.stat:last-child{border-right:none}
.stat .n{
  font-family:"JetBrains Mono",monospace;font-size:38px;font-weight:700;
  color:var(--vermilion);line-height:1;
}
.stat .l{font-size:12px;letter-spacing:2px;color:var(--ink-soft);margin-top:8px;text-transform:uppercase}
.pd-section.dark .stat-strip{border-color:rgba(244,235,217,.4)}
.pd-section.dark .stat{border-color:rgba(244,235,217,.15)}
.pd-section.dark .stat .l{color:rgba(244,235,217,.6)}

/* --- FAQ --- */
.faq{max-width:820px;margin-top:32px}
.faq details{
  border-bottom:1px solid rgba(26,20,16,.2);padding:22px 0;cursor:pointer;
}
.faq summary{
  font-family:"Noto Serif TC",serif;font-size:19px;font-weight:700;
  list-style:none;display:flex;justify-content:space-between;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-family:"JetBrains Mono",monospace;color:var(--vermilion);font-size:24px;
  transition:transform .3s;
}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:14px;color:var(--ink-soft);font-size:15px;line-height:1.85}

/* --- CTA footer --- */
.pd-cta{
  background:var(--vermilion);color:var(--paper);
  padding:80px 40px;text-align:center;
}
.pd-cta h2{
  font-family:"Noto Serif TC",serif;font-size:clamp(32px,4vw,52px);
  font-weight:700;margin-bottom:20px;letter-spacing:-.5px;
}
.pd-cta p{
  font-size:17px;max-width:600px;margin:0 auto 32px;line-height:1.8;opacity:.92;
}
.pd-cta .btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.pd-cta .btn{
  padding:16px 34px;background:var(--paper);color:var(--ink);
  text-decoration:none;font-weight:700;letter-spacing:2px;
  border:2px solid var(--paper);transition:all .2s;
  font-size:14px;display:inline-block;
}
.pd-cta .btn:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.pd-cta .btn.ghost{background:transparent;color:var(--paper)}
.pd-cta .btn.ghost:hover{background:var(--paper);color:var(--vermilion)}

/* --- Prev / Next pillar nav --- */
.pillar-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border-top:1px solid rgba(26,20,16,.15);
  border-bottom:1px solid rgba(26,20,16,.15);
}
.pillar-nav a{
  padding:36px 40px;text-decoration:none;color:var(--ink);
  display:block;transition:background .2s;
}
.pillar-nav a:hover{background:var(--paper-2)}
.pillar-nav a.next{text-align:right;border-left:1px solid rgba(26,20,16,.15)}
.pillar-nav .hint{
  font-family:"JetBrains Mono",monospace;font-size:11px;
  letter-spacing:3px;color:var(--vermilion);margin-bottom:8px;
}
.pillar-nav .title{font-family:"Noto Serif TC",serif;font-size:22px;font-weight:700}

/* --- Site footer --- */
.pd-foot{
  background:var(--ink);color:rgba(244,235,217,.7);
  padding:36px 40px;text-align:center;font-size:12px;letter-spacing:2px;
  font-family:"JetBrains Mono",monospace;
}
.pd-foot a{color:var(--vermilion);text-decoration:none}

/* --- Responsive --- */
@media (max-width:720px){
  .topbar,.pd-hero,.pd-section,.pd-section.alt,.pd-section.dark,.pd-cta,.pd-foot,.pillar-nav a{padding-left:22px;padding-right:22px}
  .pd-hero{padding-top:48px;padding-bottom:60px}
  .pillar-nav{grid-template-columns:1fr}
  .pillar-nav a.next{border-left:none;border-top:1px solid rgba(26,20,16,.15);text-align:left}
}