/* ============================================================
   Craftflow — Brand Design System v3final
   AI 企業工作流導入 · 老牌可信 · 專業顧問
   ============================================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&family=Noto+Serif+TC:wght@400;500;600;700&display=swap');

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  font-family:'DM Sans','Noto Sans TC',system-ui,-apple-system,sans-serif;
  background:#0b1119;
  color:rgba(255,255,255,.82);
  line-height:1.7;
  overflow-x:hidden;
}
::selection{background:rgba(201,168,76,.3);color:#fff}

/* --- CSS Custom Properties --- */
:root{
  --gold:#c9a84c;
  --gold-light:#e8d18a;
  --gold-dark:#a68a30;
  --bg:#0b1119;
  --bg-card:#101924;
  --bg-card-hover:#172133;
  --border:rgba(255,255,255,.06);
  --border-gold:rgba(201,168,76,.25);
  --text:rgba(255,255,255,.82);
  --text-muted:rgba(255,255,255,.4);
  --text-heading:rgba(255,255,255,.92);
  --radius:10px;
  --radius-lg:18px;
  --shadow:0 8px 40px rgba(0,0,0,.4);
  --transition:.35s cubic-bezier(.22,.61,.36,1);
  --max-w:1200px;
  --nav-h:72px;
}

/* --- Typography --- */
h1,h2,h3,h4{font-family:'Cormorant Garamond','Noto Serif TC',serif;color:var(--text-heading);font-weight:600;letter-spacing:-.01em;line-height:1.2}
h1{font-size:clamp(2.4rem,5.5vw,4.2rem)}
h2{font-size:clamp(1.8rem,3.8vw,3rem);margin-bottom:.6em}
h3{font-size:clamp(1.2rem,2.2vw,1.6rem);margin-bottom:.4em}
h4{font-size:1.1rem}
.section-label{display:inline-block;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:.8rem;font-weight:600}

/* --- Gold accent elements --- */
.gold{color:var(--gold)}
.gold-border{border-color:var(--border-gold)!important}

/* --- Container --- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}
.container-wide{max-width:1360px;margin:0 auto;padding:0 1.5rem}

/* --- Navigation --- */
nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--nav-h);
  background:rgba(11,17,25,.85);
  backdrop-filter:blur(16px) saturate(1.4);
  -webkit-backdrop-filter:blur(16px) saturate(1.4);
  border-bottom:1px solid rgba(255,255,255,.04);
  transition:var(--transition);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;max-width:1360px;margin:0 auto;padding:0 1.5rem;
}
.logo{
  font-family:'Cormorant Garamond',serif;font-size:1.4rem;font-weight:600;
  color:#fff;text-decoration:none;letter-spacing:.02em;
  display:flex;align-items:center;gap:.5rem;
}
.logo span{color:var(--gold)}
.nav-links{display:flex;align-items:center;gap:.1rem;list-style:none}
.nav-links a{
  color:var(--text-muted);text-decoration:none;font-size:.82rem;font-weight:500;
  padding:.5rem .85rem;border-radius:6px;transition:var(--transition);
  position:relative;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.04)}
.nav-cta{
  background:var(--gold);color:#0b1119!important;font-weight:700!important;
  padding:.5rem 1.3rem!important;border-radius:6px!important;
  font-size:.78rem!important;letter-spacing:.03em;
  transition:var(--transition);
}
.nav-cta:hover{background:var(--gold-light)!important;transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:.3rem}

/* --- Hero --- */
.hero{
  min-height:100vh;display:flex;align-items:center;
  padding:var(--nav-h) 0 0;
  position:relative;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 80% 50% at 30% 40%, rgba(201,168,76,.04) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 70% 60%, rgba(255,255,255,.02) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 50% 80%, rgba(201,168,76,.02) 0%, transparent 50%);
  pointer-events:none;
}
.hero-content{position:relative;z-index:1;max-width:800px}
.hero h1{margin-bottom:.5rem}
.hero .subtitle{font-size:clamp(1rem,2vw,1.2rem);color:var(--text-muted);line-height:1.6;margin-bottom:2.5rem}
.hero .stats{display:flex;gap:2.5rem;margin-top:3rem}
.hero .stat{text-align:center}
.hero .stat-num{font-size:2.2rem;font-weight:700;color:var(--gold);font-family:'Cormorant Garamond',serif}
.hero .stat-label{font-size:.75rem;color:var(--text-muted);margin-top:.1rem}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.75rem 2rem;border-radius:8px;font-size:.88rem;font-weight:600;
  text-decoration:none;transition:var(--transition);cursor:pointer;
  border:none;letter-spacing:.01em;
}
.btn-gold{background:var(--gold);color:#0b1119}
.btn-gold:hover{background:var(--gold-light);transform:translateY(-2px);box-shadow:0 6px 25px rgba(201,168,76,.2)}
.btn-outline{background:transparent;border:1px solid var(--border-gold);color:var(--gold)}
.btn-outline:hover{background:rgba(201,168,76,.08);transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-group{display:flex;gap:.8rem;flex-wrap:wrap}

/* --- Section --- */
.section{padding:clamp(4rem,8vw,7rem) 0}
.section-dark{background:rgba(255,255,255,.015)}
.section-gold-bg{background:linear-gradient(135deg, rgba(201,168,76,.04) 0%, transparent 60%)}
.section-header{text-align:center;max-width:640px;margin:0 auto 3.5rem}
.section-header p{color:var(--text-muted);font-size:.95rem}

/* --- Grid Cards --- */
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:1.5rem}

.card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:2rem;transition:var(--transition);
}
.card:hover{background:var(--bg-card-hover);border-color:var(--border-gold);transform:translateY(-3px)}
.card-icon{font-size:2rem;margin-bottom:1rem}
.card h3{font-size:1.2rem;margin-bottom:.5rem}
.card p{color:var(--text-muted);font-size:.85rem;line-height:1.6}
.card .meta{color:var(--text-muted);font-size:.78rem;margin-top:.6rem}

/* --- Price Cards --- */
.pricing-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem
}
.pricing-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:2rem 1.8rem;text-align:center;transition:var(--transition);
  position:relative;
}
.pricing-card:hover{border-color:var(--border-gold);transform:translateY(-3px)}
.pricing-card.featured{
  border-color:var(--gold);background:linear-gradient(135deg, rgba(201,168,76,.08) 0%, transparent 60%);
}
.pricing-card .tag{
  position:absolute;top:-.6rem;left:50%;transform:translateX(-50%);
  background:var(--gold);color:#0b1119;font-size:.65rem;font-weight:700;
  padding:.25rem .9rem;border-radius:20px;letter-spacing:.05em;
}
.pricing-card .icon{font-size:1.8rem;margin-bottom:.5rem}
.pricing-card .name{font-family:'Cormorant Garamond',serif;font-size:1.1rem;font-weight:600;margin-bottom:.3rem}
.pricing-card .price{font-size:2rem;font-weight:700;color:var(--gold);font-family:'Cormorant Garamond',serif;margin-bottom:.2rem}
.pricing-card .price-sub{font-size:.7rem;color:var(--text-muted);margin-bottom:1rem}
.pricing-card ul{list-style:none;text-align:left;margin:1rem 0}
.pricing-card ul li{padding:.3rem 0;font-size:.8rem;color:var(--text-muted);display:flex;gap:.5rem;align-items:flex-start}
.pricing-card ul li::before{content:"✦";color:var(--gold);font-size:.6rem;margin-top:.3rem}
.pricing-card .btn{margin-top:.5rem}

/* --- Process Timeline --- */
.timeline{position:relative;padding-left:2.5rem}
.timeline::before{
  content:'';position:absolute;left:.6rem;top:0;bottom:0;
  width:2px;background:linear-gradient(to bottom, var(--gold), var(--border));
}
.timeline-item{position:relative;padding-bottom:2.5rem}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:'';position:absolute;left:-2rem;top:.35rem;
  width:12px;height:12px;border-radius:50%;
  background:var(--gold);border:3px solid #0b1119;
}
.timeline-item .step{font-family:'Cormorant Garamond',serif;font-size:.8rem;color:var(--gold);font-weight:600;margin-bottom:.15rem}
.timeline-item h4{margin-bottom:.2rem}
.timeline-item p{color:var(--text-muted);font-size:.85rem;line-height:1.6}

/* --- Case Card (horizontal) --- */
.case-card{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;transition:var(--transition);
}
.case-card:hover{border-color:var(--border-gold)}
.case-before,.case-after{padding:2rem}
.case-before{background:rgba(255,255,255,.02);border-right:1px solid var(--border)}
.case-label{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;font-weight:600;margin-bottom:.8rem}
.case-before .case-label{color:#e74c3c}
.case-after .case-label{color:#2ecc71}
.case-before ul,.case-after ul{list-style:none}
.case-before li,.case-after li{padding:.25rem 0;font-size:.8rem;color:var(--text-muted);display:flex;gap:.4rem;align-items:flex-start}
.case-before li::before{content:"✕";color:#e74c3c;font-size:.65rem;margin-top:.25rem}
.case-after li::before{content:"✓";color:#2ecc71;font-size:.75rem}
.case-footer{padding:1.2rem 2rem;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;grid-column:1/-1}
.case-footer .tags{display:flex;gap:.4rem;flex-wrap:wrap}
.case-footer .tag{font-size:.65rem;background:rgba(201,168,76,.1);color:var(--gold);padding:.15rem .6rem;border-radius:4px}

/* --- CTA Section --- */
.cta-section{
  text-align:center;padding:clamp(4rem,8vw,6rem) 0;
  position:relative;
}
.cta-section h2{margin-bottom:.8rem}
.cta-section p{color:var(--text-muted);max-width:520px;margin:0 auto 2rem}

/* --- Footer --- */
footer{
  border-top:1px solid var(--border);
  padding:3rem 0 2rem;
}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2.5rem}
.footer-brand .logo{margin-bottom:.5rem}
.footer-brand p{font-size:.82rem;color:var(--text-muted);max-width:320px}
.footer-col h4{font-size:.85rem;font-weight:600;color:var(--text-heading);margin-bottom:.8rem;letter-spacing:.02em}
.footer-col a{display:block;color:var(--text-muted);text-decoration:none;font-size:.8rem;padding:.25rem 0;transition:var(--transition)}
.footer-col a:hover{color:var(--gold)}
.footer-social{display:flex;gap:.6rem;margin-top:1rem}
.footer-social a{
  width:38px;height:38px;border-radius:8px;
  background:rgba(255,255,255,.04);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  text-decoration:none;font-size:1rem;transition:var(--transition);color:var(--text-muted);
}
.footer-social a:hover{background:rgba(201,168,76,.1);border-color:var(--border-gold);color:var(--gold)}
.footer-bottom{margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border);font-size:.75rem;color:var(--text-muted);text-align:center}

/* --- Page Header --- */
.page-header{
  padding:calc(var(--nav-h) + 4rem) 0 3rem;
  text-align:center;position:relative;
}
.page-header h1{margin-bottom:.5rem}
.page-header p{color:var(--text-muted);max-width:560px;margin:0 auto;font-size:.95rem}

/* --- Responsive --- */
@media(max-width:900px){
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:rgba(11,17,25,.98);backdrop-filter:blur(12px);
    flex-direction:column;padding:1rem;gap:.2rem;
    transform:translateY(-120%);opacity:0;transition:var(--transition);
    pointer-events:none;border-bottom:1px solid var(--border);
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-toggle{display:block}
  .nav-links a{padding:.7rem 1rem;width:100%}
  .nav-cta{margin-top:.3rem;text-align:center!important}
  .case-card{grid-template-columns:1fr}
  .case-before{border-right:none;border-bottom:1px solid var(--border)}
  .hero .stats{gap:1.5rem;flex-wrap:wrap}
  .footer-inner{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
}

/* --- Animations --- */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.anim-fade-up{animation:fadeUp .7s var(--transition) forwards}
.anim-fade-in{animation:fadeIn .8s forwards}
.anim-delay-1{animation-delay:.1s}
.anim-delay-2{animation-delay:.2s}
.anim-delay-3{animation-delay:.35s}
.anim-delay-4{animation-delay:.5s}

/* --- Utility --- */
.text-center{text-align:center}
.mt-2{margin-top:2rem}
.mt-3{margin-top:3rem}
.gap-row{display:flex;gap:.5rem;flex-wrap:wrap}
.muted{color:var(--text-muted)}