:root{
  --bg:#FBFAF7;--bg2:#F3EFE6;--card:#FFFFFF;--line:rgba(16,35,63,.13);
  --ink:#10233F;--mid:#42536B;--grey:#7C8798;--gold:#A8843C;--gold-soft:rgba(168,132,60,.12);
  --cn:"PingFang HK","PingFang SC","Microsoft YaHei",sans-serif;
  --en:"Helvetica Neue","PingFang HK",sans-serif;--mono:ui-monospace,"SF Mono",monospace;
  --max:1240px;--ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{background:var(--bg);scroll-behavior:smooth}
body{margin:0;color:var(--mid);font-family:var(--cn);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;background:var(--bg)}
img{display:block;max-width:100%}
a{color:var(--ink);text-decoration:none}
h1,h2,h3{color:var(--ink);font-weight:600;line-height:1.22;margin:0;letter-spacing:-.01em}
p{margin:0 0 14px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* 內部使用橫幅 */
.banner{position:fixed;top:0;left:0;right:0;z-index:60;background:var(--gold);color:#14100A;
  font-size:11.5px;letter-spacing:.06em;text-align:center;padding:6px 14px;font-weight:600}
.banner span{opacity:.75;font-weight:400}

/* 導航 */
header{position:fixed;top:30px;left:0;right:0;z-index:50;background:linear-gradient(180deg,rgba(251,250,247,.96),rgba(251,250,247,.72) 72%,rgba(251,250,247,0));
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.nav{display:flex;align-items:center;gap:26px;height:62px}
.brand{font-family:var(--en);letter-spacing:.2em;font-size:12px;color:var(--ink)}
.brand b{color:var(--gold);font-weight:600}
.nav nav{margin-left:auto;display:flex;gap:24px;font-size:13px}
.nav nav a{color:var(--grey);transition:color .25s var(--ease)}
.nav nav a:hover,.nav nav a[aria-current]{color:var(--ink)}
.nav nav a[aria-current]{border-bottom:1px solid var(--gold);padding-bottom:2px}

/* 首屏 */
.hero{position:relative;height:100svh;min-height:640px;display:grid;grid-template-columns:minmax(380px,44%) 1fr;align-items:center;overflow:hidden;background:var(--bg)}
.hero-media{position:relative;height:100%;background:#EDE9E0;order:2}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:56% 50%;
  transform:scale(1.01);animation:ken 26s var(--ease) infinite alternate;filter:saturate(.92) contrast(1.04)}
@keyframes ken{from{transform:scale(1.01) translate3d(0,0,0)}to{transform:scale(1.055) translate3d(-.8%,-.6%,0)}}
/* 跟隨滑鼠的光源 */
.hero-spot{position:absolute;left:44%;right:0;top:0;bottom:0;pointer-events:none;mix-blend-mode:soft-light;opacity:0;transition:opacity .6s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,45%),rgba(255,246,220,.85),rgba(255,236,190,.35) 42%,transparent 70%)}
.hero:hover .hero-spot{opacity:1}
.hero-shade{position:absolute;left:44%;right:0;top:0;bottom:0;pointer-events:none;background:linear-gradient(90deg,var(--bg) 0%,rgba(251,250,247,.55) 6%,transparent 22%)}
.hero-in{position:relative;z-index:2;order:1;width:100%;padding:0 0 0 max(28px,calc((100vw - 1240px)/2))}
.kicker{font-family:var(--en);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--gold)}
.hero h1{font-size:clamp(34px,4.4vw,60px);margin:18px 0 16px;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p{font-size:clamp(15px,1.3vw,17px);max-width:520px;color:var(--mid)}
.cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border:1px solid var(--gold);
  color:#14100A;background:var(--gold);font-size:14px;letter-spacing:.04em;transition:.3s var(--ease)}
.btn:hover{background:transparent;color:var(--gold)}
.btn.ghost{border-color:rgba(16,35,63,.22);background:transparent;color:var(--ink)}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold)}
.scroll-hint{display:none}
.scroll-hint::after{content:"";display:block;width:1px;height:34px;margin:10px auto 0;
  background:linear-gradient(180deg,var(--gold),transparent);animation:drop 2s infinite}
@keyframes drop{0%{opacity:0;transform:scaleY(.2)}40%{opacity:1}100%{opacity:0;transform:scaleY(1)}}

/* 章節 */
section{position:relative;padding:104px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:14px}
.sec-num{font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:.1em}
.sec-head h2{font-size:clamp(24px,3.2vw,38px)}
.lede{color:var(--mid);font-size:16px;max-width:720px}
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* 光源引導：車輛熱點 */
.stage{position:relative;margin-top:44px;border:1px solid var(--line);background:#EDE9E0;overflow:hidden}
.stage img{width:100%;display:block;opacity:.96;aspect-ratio:16/7;object-fit:cover;object-position:50% 50%}
.stage::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(56% 60% at var(--sx,50%) var(--sy,50%),rgba(255,250,232,.42),rgba(168,132,60,.10) 45%,transparent 72%);
  transition:background .5s var(--ease)}
.hot{position:absolute;width:34px;height:34px;border-radius:50%;border:1px solid var(--gold);
  background:rgba(201,163,86,.14);cursor:pointer;transform:translate(-50%,-50%);transition:.3s var(--ease)}
.hot::after{content:"";position:absolute;inset:-1px;border-radius:50%;border:1px solid var(--gold);
  animation:pulse 2.6s infinite}
@keyframes pulse{0%{transform:scale(1);opacity:.85}70%{transform:scale(2.1);opacity:0}100%{opacity:0}}
.hot:hover,.hot.on{background:var(--gold);box-shadow:0 0 26px rgba(201,163,86,.65)}
.hot span{position:absolute;left:44px;top:50%;transform:translateY(-50%);white-space:nowrap;
  font-size:12.5px;color:var(--ink);background:rgba(255,255,255,.96);border:1px solid var(--line);box-shadow:0 6px 22px rgba(16,35,63,.12);
  padding:7px 12px;opacity:0;pointer-events:none;transition:.3s}
.hot.on span,.hot:hover span{opacity:1}
.caption{margin-top:10px;font-size:11.5px;color:var(--grey)}
.caption b{color:var(--gold);font-weight:500}

/* 卡片 */
.grid{display:grid;gap:16px;margin-top:34px}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(185px,1fr))}
.card{border:1px solid var(--line);background:var(--card);padding:26px 24px;transition:.4s var(--ease)}
.card:hover{border-color:rgba(168,132,60,.42);background:#FFFDF7;transform:translateY(-3px);box-shadow:0 10px 28px rgba(16,35,63,.07)}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14px;margin:0;color:var(--mid)}
.num{font-family:var(--mono);font-size:38px;color:var(--ink);line-height:1.05}
.num small{font-size:15px;color:var(--gold);margin-left:4px}
.num-lab{font-size:12.5px;color:var(--grey);margin-top:8px}

/* 規格表 */
table{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:26px}
th,td{text-align:left;padding:15px 14px;border-bottom:1px solid var(--line)}
th{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);font-weight:500}
td.k{color:var(--grey);width:34%}
tr:hover td{background:rgba(16,35,63,.028)}
.ok{color:#2F7D5B}.wait{color:var(--gold)}

/* 圖集 */
.shots{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:16px;margin-top:34px}
.shot{border:1px solid var(--line);overflow:hidden;position:relative;background:#EDE9E0}
.shot{display:block}.shot img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 1.2s var(--ease)}
.shot:hover img{transform:scale(1.04)}
.shot .meta{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;font-size:11.5px;color:var(--grey);
  background:linear-gradient(0deg,rgba(251,250,247,.96),rgba(251,250,247,0))}

/* 表單 */
form{display:grid;gap:14px;max-width:640px;margin-top:30px}
label{font-size:12px;color:var(--grey);display:block;margin-bottom:6px;letter-spacing:.04em}
input,select,textarea{width:100%;background:#fff;border:1px solid var(--line);
  color:var(--ink);padding:14px 15px;font:inherit;font-size:14.5px;transition:.25s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--gold);background:#FFFDF6}

footer{border-top:1px solid var(--line);padding:56px 0 70px;font-size:12.5px;color:var(--grey)}
footer strong{color:var(--ink);font-weight:600}
.note{border-left:2px solid var(--gold);background:rgba(168,132,60,.08);padding:16px 20px;font-size:13.5px;color:var(--mid)}
@media(max-width:900px){
  .hero{grid-template-columns:1fr;align-items:start;height:auto;min-height:0}
  .hero-media{order:1;height:44svh}
  .hero-in{order:2;padding:34px 24px 8px}
  .hero-shade,.hero-spot{display:none}
  .scroll-hint{display:none}
}
@media(max-width:760px){
  .nav nav{display:none}
  section{padding:72px 0}
  .hot span{left:auto;right:44px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}