/* =========================================================
 汎叡 FR 網站共用樣式（所有頁面共用這一份）
 ========================================================= */

:root{
  --navy:#1d3a6b;
  --navy-dark:#162e56;
  --text:#2b2f36;
  --muted:#5b6270;
  --accent:#2f6b4f;
  --line:#dde3ea;
  --logo-blue:#2b8fd0;
  --logo-green:#7cc142;
  --max:1180px;
  --bg:#f2f5f9;      /* 背景：霧藍灰 */
  --surface:#fff;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:"Noto Sans TC","Inter",system-ui,sans-serif;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* Header */
header{border-bottom:1px solid var(--line);background:var(--bg)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:6px}
.logo-mark{
  font-family:"Inter",sans-serif;font-weight:700;font-size:40px;letter-spacing:-3px;line-height:1;
  background:linear-gradient(90deg,var(--logo-green) 0 45%,var(--logo-blue) 55%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.logo-text strong{display:block;color:var(--logo-blue);font-size:21px;font-weight:700;letter-spacing:2px;line-height:1.1}
.logo-text small{display:block;color:var(--logo-blue);font-family:"Inter",sans-serif;font-size:11px;letter-spacing:.3px}
.menu{display:flex;align-items:center;gap:36px;font-size:15px;font-weight:500;color:var(--text)}
.menu a:hover{color:var(--navy)}
.menu .contact{margin-left:22px;display:inline-flex;align-items:center;gap:14px}
.menu-toggle{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--navy)}

/* Hero */
.hero{padding:44px 0 56px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:"Inter",sans-serif;font-size:11px;font-weight:500;letter-spacing:.4px;color:var(--accent);
  margin-bottom:34px;
}
.eyebrow::before{content:"";width:6px;height:6px;background:var(--accent)}
h1{
  font-size:clamp(36px,5vw,60px);font-weight:900;line-height:1.25;color:var(--navy);
  letter-spacing:2px;margin-bottom:38px;
}
.lead{font-size:16px;line-height:1.75;color:var(--muted);margin-bottom:38px}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.btn{
  display:inline-flex;align-items:center;gap:22px;height:47px;padding:0 22px;
  font-size:14px;font-weight:500;border-radius:2px;transition:.2s;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--navy);color:#fff;border:1px solid var(--navy)}
.btn-primary:hover{background:var(--navy-dark)}
.btn-outline{background:var(--surface);color:var(--navy);border:1px solid #c9cfd8}
.btn-outline:hover{border-color:var(--navy)}
.steps{display:flex;align-items:center;gap:12px;font-size:11px;color:var(--muted)}
.steps span.sep{color:#b8bdc6}

.visual{
  position:relative;aspect-ratio:522/504;overflow:hidden;
  background:#1b2333 url("../images/hero.jpg") center/cover no-repeat;
  /* 柔光陰影：白色細邊＋帶藍色調的柔和陰影 */
  border-radius:20px;
  border:6px solid #fff;
  box-shadow:0 30px 60px -20px rgba(29,58,107,.35),0 12px 24px -12px rgba(29,58,107,.2);
}
.visual.placeholder{
  background:
    radial-gradient(circle at 55% 52%, #9fb6c9 0 18%, #5e7186 19% 22%, transparent 23%),
    linear-gradient(160deg,#2a3346 0%,#1a2130 60%,#121826 100%);
}
.visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,16,30,.15) 0%,rgba(10,16,30,0) 45%,rgba(10,16,30,.65) 100%);
}
.visual .cap{
  z-index:1;
  position:absolute;left:22px;right:22px;bottom:20px;
  display:flex;justify-content:space-between;align-items:center;
  color:rgba(255,255,255,.92);font-size:10px;
}
.visual .cap .en{font-family:"Inter",sans-serif;letter-spacing:.4px}

@media (max-width:900px){
  .menu{display:none}
  .menu.open{
    display:flex;flex-direction:column;align-items:flex-start;gap:18px;
    position:absolute;top:78px;left:0;right:0;background:var(--bg);padding:20px 24px;border-bottom:1px solid var(--line);z-index:10;
  }
  .menu.open .contact{margin-left:0}
  .menu-toggle{display:block}
  header{position:relative}
  .hero-grid{grid-template-columns:1fr}
  .visual{order:-1}
  .eyebrow{margin-bottom:20px}
  h1{margin-bottom:24px}
}

/* ===== 關於汎叡 頁面 ===== */
.menu a.active{color:var(--navy);font-weight:700}
.page-head{padding:40px 0 28px;border-bottom:1px solid var(--line)}
.page-head .eyebrow{margin-bottom:12px}
.page-head h1{margin-bottom:12px;font-size:clamp(32px,4.2vw,48px)}
.page-head .lead{max-width:640px;margin-bottom:0}

.story{padding:72px 0 96px}
.story-grid{display:grid;grid-template-columns:280px 1fr;gap:64px;align-items:start}
.story-side{position:sticky;top:24px}
.story-side h2{font-size:24px;color:var(--navy);margin-bottom:14px;letter-spacing:1px}
.story-side p{font-size:14px;line-height:1.8;color:var(--muted)}
.stat{margin-top:28px;padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:12px}
.stat b{display:block;font-family:"Inter",sans-serif;font-size:40px;font-weight:500;color:var(--navy);line-height:1}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--muted)}

.timeline{list-style:none;position:relative;padding-left:36px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(var(--logo-green),var(--logo-blue))}
.timeline li{position:relative;padding-bottom:44px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-36px;top:4px;width:16px;height:16px;border-radius:50%;
  background:var(--bg);border:3px solid var(--logo-blue)}
.timeline li:first-child::before{border-color:var(--logo-green)}
.timeline .tag{font-family:"Inter",sans-serif;font-size:12px;font-weight:500;letter-spacing:.6px;color:var(--accent);margin-bottom:8px}
.timeline h3{font-size:20px;color:var(--navy);margin-bottom:12px}
.timeline p{font-size:16px;line-height:1.9;color:var(--text)}

.closing{margin-top:56px;padding:36px 40px;border-radius:16px;background:var(--navy);color:#fff;
  box-shadow:0 30px 60px -24px rgba(29,58,107,.45)}
.closing p{font-size:19px;line-height:1.8;font-weight:500}
.closing .actions{margin:26px 0 0}
.closing .btn-light{background:#fff;color:var(--navy);border:1px solid #fff}
.closing .btn-light:hover{background:#e8eef6}
.closing .btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.closing .btn-ghost:hover{border-color:#fff}

@media (max-width:900px){
  .page-head{padding:32px 0 24px}
  .story{padding:48px 0 72px}
  .story-grid{grid-template-columns:1fr;gap:40px}
  .story-side{position:static}
  .closing{padding:28px 24px}
  .closing p{font-size:17px}
}


/* ===== 產品介紹 頁面 ===== */
.cat-nav{position:sticky;top:0;z-index:20;background:rgba(242,245,249,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.cat-nav-inner{display:flex;gap:8px;height:52px;align-items:center;overflow-x:auto}
.cat-nav a{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;font-size:14px;font-weight:500;color:var(--muted);white-space:nowrap;transition:.2s}
.cat-nav a span{font-family:"Inter",sans-serif;font-size:11px;color:var(--logo-blue)}
.cat-nav a:hover{background:var(--surface);color:var(--navy)}

.product-cat{padding:48px 0 72px;scroll-margin-top:52px}
.product-cat.alt{background:var(--surface)}
.cat-grid{display:grid;grid-template-columns:280px 1fr;gap:56px;align-items:start}
.cat-intro{position:sticky;top:96px}
.cat-num{font-family:"Inter",sans-serif;font-size:56px;font-weight:500;line-height:1;margin-bottom:16px;
  background:linear-gradient(90deg,var(--logo-green),var(--logo-blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.cat-intro .eyebrow{margin-bottom:12px}
.cat-intro h2{font-size:30px;color:var(--navy);letter-spacing:1px;margin-bottom:14px}
.cat-intro p:last-child{font-size:15px;line-height:1.85;color:var(--muted)}

.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.product-grid.grid-2{grid-template-columns:repeat(2,1fr)}
.product-grid.grid-2 .product-img{aspect-ratio:16/9}
.product-grid.grid-2 .product-img svg{width:24%}
.product-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;transition:transform .2s,box-shadow .2s,border-color .2s}
.product-cat.alt .product-card{background:var(--bg)}
.product-card:hover{transform:translateY(-4px);border-color:#c6d3e2;box-shadow:0 20px 40px -24px rgba(29,58,107,.35)}
.product-img{display:grid;place-items:center;aspect-ratio:4/3;border-radius:10px;margin-bottom:18px;color:var(--navy);
  background:radial-gradient(circle at 30% 25%,rgba(124,193,66,.16),transparent 60%),radial-gradient(circle at 75% 80%,rgba(43,143,208,.18),transparent 60%),#e9eff6}
.product-cat.alt .product-img{background:radial-gradient(circle at 30% 25%,rgba(124,193,66,.16),transparent 60%),radial-gradient(circle at 75% 80%,rgba(43,143,208,.18),transparent 60%),#fff}
.product-img svg{width:38%;height:auto}
.product-img img{width:100%;height:100%;object-fit:cover;border-radius:10px}
.product-en{font-family:"Inter",sans-serif;font-size:11px;font-weight:500;letter-spacing:.6px;color:var(--accent);margin-bottom:6px}
.product-card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.product-desc{font-size:14px;line-height:1.75;color:var(--text);margin-bottom:12px}
.product-use{font-size:13px;line-height:1.7;color:var(--muted);margin-bottom:10px}
.product-use span{display:inline-block;margin-right:8px;padding:1px 8px;border-radius:4px;background:rgba(43,143,208,.1);color:var(--logo-blue);font-size:12px;font-weight:500}
.product-spec{font-size:12px;color:#8a919c;margin-bottom:18px}
.product-link{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--navy)}
.product-link svg{width:14px;height:14px;transition:transform .2s}
.product-link:hover svg{transform:translateX(3px)}

.product-cta{padding:24px 0 96px}
.product-cta .closing{margin-top:0}

@media (max-width:900px){
  .product-cat{padding:36px 0 56px}
  .cat-grid{grid-template-columns:1fr;gap:28px}
  .cat-intro{position:static}
  .product-grid.grid-2{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .cat-num{font-size:44px}
  .product-cta{padding:8px 0 72px}
}