:root{--logo:url("img/logo.png")}
:root{
  /* light ground */
  --ground:#FFFFFF; --surface:#FAF9F7; --surface-2:#F1EFEB;
  --ink:#15181D; --titanium:#4A4E59; --muted:#6E7480;
  --rule:#E6E4E0; --rule-strong:#C6C2BA;
  /* dark ground */
  --deep:#111419; --deep-2:#1A1E25; --deep-3:#252A33;
  --on-deep:#F4F3F1; --on-deep-2:#A8AEB8; --on-deep-rule:rgba(255,255,255,.13);
  /* accent */
  --accent:#8A5F14;        /* gold text on white  5.6:1 */
  --accent-fill:#FFDC84;   /* gold fill / text on dark 10.5:1 */
  --accent-mid:#C9922E; --accent-ink:#15181D;
  --max:1180px;
  --step-0:1rem; --step-1:1.1875rem; --step-2:1.5rem; --step-3:2.125rem;
  --step-4:2.75rem; --step-5:4rem;
  --sans:"Archivo","Noto Sans TC",-apple-system,"Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono","Noto Sans TC",ui-monospace,Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
  /* engineering hairline grid */
  --grid: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px) 0 0/100% 46px,
          linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px) 0 0/46px 100%;
}
html{background:#fff;color-scheme:light;scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);
  font-size:var(--step-0);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3{margin:0;font-weight:600;line-height:1.12;letter-spacing:-0.025em;text-wrap:balance}
p{margin:0}
a{color:inherit}
img{max-width:100%;display:block}
::selection{background:var(--accent-fill);color:var(--accent-ink)}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:clamp(20px,5vw,52px)}
.label{font-family:var(--mono);font-size:0.75rem;font-weight:500;letter-spacing:0.16em;
  text-transform:uppercase;color:var(--accent)}

/* ── scroll reveal ─────────────────────────────── */
.rv{opacity:0;transform:translateY(16px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ── header ────────────────────────────────────── */
.mark{width:calc(var(--s,34px)*0.946);height:var(--s,34px);background-color:currentColor;
  -webkit-mask:var(--logo) center/contain no-repeat;mask:var(--logo) center/contain no-repeat;flex:none}
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--rule);transition:box-shadow .3s var(--ease),background .3s var(--ease)}
header.stuck{box-shadow:0 1px 20px rgba(17,20,25,.09);background:rgba(255,255,255,.95)}
.bar{display:flex;align-items:center;gap:18px;height:74px;transition:height .3s var(--ease)}
header.stuck .bar{height:62px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.brand .nm{display:flex;flex-direction:column;line-height:1.15}
.brand .nm b{font-size:0.9375rem;font-weight:700;letter-spacing:-0.015em}
.brand .nm span{font-family:var(--mono);font-size:0.625rem;letter-spacing:0.11em;color:var(--accent);text-transform:uppercase}
.spacer{flex:1}
nav{display:flex;gap:28px}
nav a{position:relative;font-size:0.875rem;color:var(--titanium);text-decoration:none;padding:6px 0}
nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent-fill);
  transform:scaleX(0);transform-origin:left;transition:transform .32s var(--ease)}
nav a:hover{color:var(--ink)}
nav a:hover::after{transform:scaleX(1)}
nav a[aria-current="page"]{color:var(--ink);font-weight:600}
nav a[aria-current="page"]::after{transform:scaleX(1)}
.langs{display:flex;border:1px solid var(--rule-strong);border-radius:2px;overflow:hidden}
.langs button{font-family:var(--mono);font-size:0.6875rem;letter-spacing:.1em;padding:5px 9px;
  background:transparent;color:var(--muted);border:0;cursor:pointer;transition:background .2s,color .2s}
.langs button[aria-pressed="true"]{background:var(--accent-fill);color:var(--accent-ink)}
.burger{display:none;background:none;border:1px solid var(--rule-strong);border-radius:2px;padding:7px 9px;cursor:pointer}
.burger span{display:block;width:17px;height:2px;background:var(--ink);margin:3px 0}
@media(max-width:900px){
  nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--rule);
      flex-direction:column;gap:0;padding:6px 0;display:none}
  nav.open{display:flex}
  nav a{padding:13px clamp(20px,5vw,52px);border-bottom:1px solid var(--rule);border-left:3px solid transparent}
  nav a::after{display:none}
  nav a[aria-current="page"]{border-left-color:var(--accent-fill)}
  .burger{display:block}
}

/* ── buttons ───────────────────────────────────── */
.btn{position:relative;display:inline-flex;align-items:center;gap:9px;background:var(--accent-fill);
  color:var(--accent-ink);font-size:0.875rem;font-weight:600;padding:13px 24px;border-radius:2px;
  text-decoration:none;border:1px solid var(--accent-fill);cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(201,146,46,.32)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule-strong);box-shadow:none}
.btn.ghost:hover{border-color:var(--accent-mid);box-shadow:0 6px 18px rgba(17,20,25,.09)}
.on-deep .btn.ghost{color:var(--on-deep);border-color:rgba(255,255,255,.28)}
.on-deep .btn.ghost:hover{border-color:var(--accent-fill);background:rgba(255,255,255,.05)}
:focus-visible{outline:2px solid var(--accent-mid);outline-offset:3px}

/* ── page shell ────────────────────────────────── */
.sec{padding-block:clamp(58px,7.5vw,104px)}
.sec + .sec{border-top:1px solid var(--rule)}
.tint{background:var(--surface)}
.tint + .sec, .sec.tint{border-top:1px solid var(--rule)}
.head{display:flex;flex-direction:column;gap:15px;margin-bottom:44px;max-width:62ch}
.head h1,.head h2{font-size:clamp(1.8rem,3.8vw,var(--step-3))}
.head p{color:var(--titanium);font-size:var(--step-1);line-height:1.62}

/* ── dark band (hero + inner page tops + cta) ──── */
.on-deep{position:relative;background:var(--deep);color:var(--on-deep);isolation:isolate;overflow:hidden;
  border-bottom:3px solid var(--accent-fill)}
.on-deep .label{color:var(--accent-fill)}
.on-deep h1,.on-deep h2,.on-deep h3{color:var(--on-deep)}
.on-deep p{color:var(--on-deep-2)}
.on-deep .bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center;
  opacity:.30;filter:grayscale(.28) contrast(1.06)}
.on-deep::before{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,var(--deep) 4%,rgba(17,20,25,.90) 42%,rgba(17,20,25,.58) 100%), var(--grid)}

/* hero */
.hero{padding-block:clamp(64px,9vw,124px) 0}
.hero .eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:0.9375rem;font-weight:600;
  color:var(--accent-fill);letter-spacing:.01em;margin-bottom:26px}
.hero .eyebrow::before{content:"";width:38px;height:1px;background:var(--accent-fill);flex:none}
.hero h1{font-size:clamp(2.05rem,5.2vw,3.5rem);max-width:21ch;margin-bottom:26px;letter-spacing:-0.035em;text-wrap:pretty}
.hero .lede{font-size:clamp(1.0625rem,1.6vw,var(--step-1));max-width:52ch;line-height:1.68;color:var(--on-deep-2)}
.hero .cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:38px}

/* stats inside the dark band */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  margin-top:clamp(52px,7vw,86px);border-top:1px solid var(--on-deep-rule)}
.stat{padding:24px 22px 30px 0;border-right:1px solid var(--on-deep-rule);position:relative}
.stat::before{content:"";position:absolute;top:-1px;left:0;width:26px;height:1px;background:var(--accent-fill)}
.stat:last-child{border-right:0}
.stat b{font-family:var(--mono);font-size:clamp(1.9rem,4vw,2.7rem);font-weight:400;letter-spacing:-0.03em;
  line-height:1;display:flex;align-items:baseline;height:1em;
  font-variant-numeric:tabular-nums;color:var(--on-deep)}
/* 中文數值：等寬字沒有中文，改用無襯線並校正到同樣的視覺高度與基線 */
.stat b .cjk{font-family:var(--sans);font-weight:600;font-size:0.82em;letter-spacing:0.02em;
  line-height:1;position:relative;top:-0.02em}
.stat b sup{font-size:.4em;vertical-align:super;color:var(--accent-fill);letter-spacing:0}
.stat span{display:block;margin-top:12px;font-size:0.8125rem;color:var(--on-deep-2);line-height:1.5}
@media(max-width:640px){
  .stat{border-right:0;border-bottom:1px solid var(--on-deep-rule);padding:18px 0 20px}
  .stat:last-child{border-bottom:0}
}

/* inner page top — same photographic treatment as the home hero */
.pagetop{padding-block:clamp(60px,7.5vw,96px)}
.pagetop .wrap{position:relative;z-index:1}
.pagetop .bg{opacity:.26}
.pagetop::before{background:linear-gradient(100deg,var(--deep) 8%,rgba(17,20,25,.90) 46%,rgba(17,20,25,.60) 100%), var(--grid)}
.pagetop h1{font-size:clamp(1.95rem,4.6vw,var(--step-4));margin-top:14px;letter-spacing:-0.03em}
.sincewrap{font-family:var(--mono);font-weight:400;letter-spacing:-0.01em;
  font-size:clamp(2.4rem,6.5vw,4.4rem);display:block;line-height:1}
.pagetop p{font-size:var(--step-1);max-width:58ch;margin-top:16px;line-height:1.62}

/* ── banner image ──────────────────────────────── */
.banner{margin-top:clamp(38px,4.5vw,56px)}
.banner img{aspect-ratio:21/8;width:100%;object-fit:cover}
@media(max-width:760px){.banner img{aspect-ratio:3/2}}

.claim{display:flex;align-items:center;gap:16px;font-size:clamp(1.0625rem,1.8vw,var(--step-2));
  font-weight:600;letter-spacing:-0.02em;color:var(--ink);margin-bottom:52px;
  padding-bottom:34px;border-bottom:1px solid var(--rule)}
.claim::before{content:"";flex:none;width:34px;height:3px;background:var(--accent-fill)}

/* ── nav cards ─────────────────────────────────── */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-top:0}
.card{position:relative;background:#fff;border:1px solid var(--rule);padding:30px 28px 26px;
  text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:9px;overflow:hidden;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.card::before{content:"";position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--accent-fill);
  transform:scaleY(0);transform-origin:top;transition:transform .34s var(--ease)}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(17,20,25,.10);border-color:var(--rule-strong)}
.card:hover::before{transform:scaleY(1)}
.card .label{margin-bottom:3px}
.card h3{font-size:var(--step-1)}
.card p{font-size:0.875rem;color:var(--titanium);line-height:1.58}
.card em{font-style:normal;font-size:0.8125rem;color:var(--accent);margin-top:auto;padding-top:14px;font-weight:600}
.card em::after{content:"";display:inline-block;width:0;transition:width .3s var(--ease)}
.card:hover em::after{width:6px}

/* ── generic grids ─────────────────────────────── */
.g3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.g3 > div{background:#fff;border:1px solid var(--rule);padding:28px 26px;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease)}
.g3 > div:hover{border-color:var(--rule-strong);box-shadow:0 10px 26px rgba(17,20,25,.07)}
.tint .g3 > div{background:#fff}
.g3 h3{font-size:var(--step-1);margin:11px 0 9px}
.g3 p{font-size:0.875rem;color:var(--titanium);line-height:1.6}
.two{display:grid;grid-template-columns:1.08fr 1fr;gap:clamp(32px,5.5vw,72px);align-items:start}
@media(max-width:820px){.two{grid-template-columns:1fr}}

/* ── images ────────────────────────────────────── */
.imgs{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px;margin-top:clamp(34px,4vw,48px)}
.imgs figure,.imgs .ph{margin:0;overflow:hidden;background:var(--surface-2)}
.imgs img{aspect-ratio:4/3;object-fit:cover;width:100%;
  transition:transform .8s var(--ease),filter .5s var(--ease)}
.imgs figure:hover img,.imgs .ph:hover img{transform:scale(1.035)}

/* ── chips ─────────────────────────────────────── */
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
/* 等寬網格：每列數量固定，不會出現只剩一個的尾巴 */
.chips.even{display:grid;grid-template-columns:repeat(6,1fr);gap:9px}
.chips.even .chip{text-align:center;padding-inline:8px}
.two .chips.even{grid-template-columns:repeat(3,1fr)}
@media(max-width:980px){.chips.even{grid-template-columns:repeat(4,1fr)}}
@media(max-width:820px){.two .chips.even{grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.chips.even,.two .chips.even{grid-template-columns:repeat(2,1fr)}}
.chip{font-family:var(--mono);font-size:0.75rem;letter-spacing:.05em;border:1px solid var(--rule-strong);
  padding:7px 13px;border-radius:2px;color:var(--titanium);background:#fff;transition:border-color .25s,color .25s}
.chip:hover{border-color:var(--accent-mid);color:var(--ink)}

/* ── facts ─────────────────────────────────────── */
.facts{border-top:1px solid var(--rule)}
.facts div{display:flex;justify-content:space-between;gap:20px;padding:14px 0;
  border-bottom:1px solid var(--rule);font-size:0.875rem}
.facts dt{color:var(--muted);font-family:var(--mono);font-size:0.75rem;letter-spacing:.08em;text-transform:uppercase}
.facts dd{margin:0;text-align:right;font-variant-numeric:tabular-nums}
.note{font-size:0.9375rem;color:var(--titanium);line-height:1.65;border-left:3px solid var(--accent-fill);
  padding:2px 0 2px 18px}
.note b{color:var(--ink)}

/* ── products list ─────────────────────────────── */
.plist{columns:2;column-gap:52px;margin-top:8px}
@media(max-width:640px){.plist{columns:1}}
.plist div{break-inside:avoid;position:relative;padding:17px 0 17px 46px;border-bottom:1px solid var(--rule);
  transition:padding-left .3s var(--ease)}
.plist div:hover{padding-left:53px}
.plist i{position:absolute;left:0;top:19px;font-style:normal;font-family:var(--mono);font-size:0.8125rem;
  color:var(--accent-mid);letter-spacing:.04em;font-variant-numeric:tabular-nums}
.plist b{display:block;font-size:var(--step-1);font-weight:600;letter-spacing:-0.015em}
.plist span{display:block;font-family:var(--mono);font-size:0.8125rem;letter-spacing:.07em;
  text-transform:uppercase;color:var(--accent);margin-top:6px}

/* 設備規格清單 */
.spec{margin:0;border-top:2px solid var(--ink)}
.spec div{display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:14px 0;border-bottom:1px solid var(--rule)}
.spec dt{font-size:0.9375rem;color:var(--ink)}
.spec dd{margin:0;font-family:var(--mono);font-size:1.375rem;font-weight:500;line-height:1;
  letter-spacing:-0.02em;font-variant-numeric:tabular-nums}
.spec .tot{border-bottom:2px solid var(--ink);background:var(--surface);
  margin-inline:-12px;padding-inline:12px}
.spec .tot dt{font-weight:600}
.spec .tot dd{font-size:1.75rem;color:var(--accent)}
.specnote{margin-top:14px;font-size:0.8125rem;color:var(--muted);line-height:1.6}

/* ── contact ───────────────────────────────────── */
.cta-band{position:relative;background:var(--deep);color:var(--on-deep);overflow:hidden;isolation:isolate}
.cta-band::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--grid)}
.cta-band .label{color:var(--accent-fill)}
.cta-band h2{color:var(--on-deep)}
.cta-band p{color:var(--on-deep-2)}
.cta-band .btn.ghost{color:var(--on-deep);border-color:rgba(255,255,255,.28)}
.cta-band .btn.ghost:hover{border-color:var(--accent-fill);background:rgba(255,255,255,.05)}
.ctline{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:26px 34px;border-top:1px solid var(--on-deep-rule);padding-top:26px}
.ctline > div{display:flex;flex-direction:column;gap:8px}
.ctline b{font-size:var(--step-1);font-weight:600;color:var(--on-deep);letter-spacing:-0.01em}
.ctline a{text-decoration:none}
.ctline a:hover{color:var(--accent-fill)}

.qgrid{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(32px,5vw,64px);align-items:start}
@media(max-width:820px){.qgrid{grid-template-columns:1fr}}
.ch{display:flex;gap:16px;padding:17px 0;border-bottom:1px solid var(--rule)}
.ch .label{flex:none;width:76px;padding-top:5px}
.ch b{display:block;font-size:var(--step-1);font-weight:600;line-height:1.35}
.ch small{display:block;color:var(--titanium);font-size:0.8125rem;margin-top:4px;line-height:1.55}
form{display:grid;gap:16px;background:#fff;border:1px solid var(--rule);padding:clamp(24px,4vw,34px);
  box-shadow:0 14px 40px rgba(17,20,25,.06)}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.f2{grid-template-columns:1fr}}
label{display:grid;gap:7px}
label .label{color:var(--muted)}
input,textarea,select{font-family:var(--sans);font-size:0.9375rem;color:var(--ink);background:#fff;
  border:1px solid var(--rule-strong);padding:11px 13px;border-radius:2px;width:100%;transition:border-color .2s,box-shadow .2s}
input:focus,textarea:focus,select:focus{border-color:var(--accent-mid);outline:none;box-shadow:0 0 0 3px rgba(255,220,132,.5)}
textarea{resize:vertical;min-height:100px}

/* ── footer ────────────────────────────────────── */
footer{background:var(--deep-2);color:var(--on-deep-2);border-top:3px solid var(--accent-fill);
  padding-block:clamp(50px,6.5vw,72px) 38px}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:38px}
@media(max-width:820px){.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.fgrid{grid-template-columns:1fr}}
footer .brand{color:var(--on-deep)}
footer .brand .nm span{color:var(--accent-fill)}
.fgrid h4{font-family:var(--mono);font-size:0.6875rem;letter-spacing:.15em;text-transform:uppercase;
  color:var(--accent-fill);font-weight:500;margin:0 0 14px}
.fgrid p,.fgrid a{font-size:0.875rem;color:var(--on-deep-2);line-height:1.78;text-decoration:none}
.fgrid a:hover{color:var(--accent-fill)}
.legal{margin-top:44px;padding-top:22px;border-top:1px solid var(--on-deep-rule);display:flex;flex-wrap:wrap;
  gap:14px;justify-content:space-between;font-family:var(--mono);font-size:0.6875rem;letter-spacing:.07em;color:#7C838F}

[data-lang="zh"] .en,[data-lang="en"] .zh{display:none !important}