.product-page{
  --product-ground:#F1F1ED;
  --product-ground-deep:#E8E8E3;
  --product-ink:#15181A;
  --product-ink-soft:#6C7073;
  --product-ink-faint:#96999A;
  --product-rule:#D5D5CF;
  --product-rule-strong:#B9B9B2;
  --product-serif:"Songti SC","Source Han Serif SC","Noto Serif SC","STSong","SimSun",serif;
  --product-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  min-height:70vh;
  background:var(--product-ground);
  color:var(--product-ink);
  font-family:var(--product-sans);
  font-size:15.5px;
  font-weight:400;
  line-height:2.05;
}

.product-page p{margin:0}
.product-page section{padding:0}

.product-shell{
  max-width:1120px;
  margin:0 auto;
  padding:0 clamp(20px,5vw,56px);
}

.product-crumb{
  padding-top:34px;
  color:var(--product-ink-faint);
  font-size:11.5px;
  letter-spacing:.16em;
}
.product-crumb a:hover{color:var(--product-ink-soft)}
.product-crumb span{margin:0 .5em}

.product-sheet{
  display:grid;
  grid-template-columns:minmax(0,46fr) minmax(0,54fr);
  gap:clamp(32px,6vw,88px);
  align-items:start;
  padding:38px 0 96px;
}

.product-viewer{position:sticky;top:108px}
.product-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--product-rule);
  background:var(--product-ground-deep);
}
.product-frame--portrait{aspect-ratio:2/3}
.product-frame--landscape{aspect-ratio:3/2}
.product-frame img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:contain;
  opacity:0;
  transition:opacity .32s ease;
}
.product-frame img.is-visible{opacity:1}

.product-light-switch{
  display:flex;
  gap:26px;
  align-items:center;
  margin-top:16px;
}
.product-light-switch button{
  appearance:none;
  padding:4px 0 7px;
  border:0;
  border-bottom:1px solid transparent;
  background:none;
  color:var(--product-ink-faint);
  cursor:pointer;
  font-family:var(--product-sans);
  font-size:12.5px;
  letter-spacing:.2em;
  transition:color .2s,border-color .2s;
}
.product-light-switch button[aria-pressed="true"]{
  border-bottom-color:var(--product-ink);
  color:var(--product-ink);
}
.product-light-switch button:hover{color:var(--product-ink-soft)}
.product-light-hint{
  margin-left:auto;
  color:var(--product-ink-faint);
  font-size:11.5px;
  letter-spacing:.06em;
}

.product-name{
  margin-top:-8px;
  font-family:var(--product-serif);
  font-size:clamp(46px,6.4vw,74px);
  font-weight:400;
  line-height:1.06;
  letter-spacing:.06em;
}
.product-eyebrow{
  margin-top:20px;
  color:var(--product-ink-soft);
  font-size:12px;
  letter-spacing:.24em;
}
.product-lede{max-width:34em;margin-top:30px}
.product-lede p+p{margin-top:1.05em}

.product-block{margin-top:46px}
.product-block-label{
  padding-bottom:12px;
  border-bottom:1px solid var(--product-rule-strong);
  color:var(--product-ink-faint);
  font-size:11px;
  letter-spacing:.26em;
}

.product-specs{list-style:none}
.product-specs li{
  display:grid;
  grid-template-columns:5.6em 1fr;
  gap:16px;
  padding:13px 0;
  border-bottom:1px solid var(--product-rule);
  font-size:14.5px;
  line-height:1.7;
}
.product-spec-label{
  padding-top:2px;
  color:var(--product-ink-soft);
  font-size:12.5px;
  letter-spacing:.12em;
}

.product-notice{
  margin-top:14px;
  color:var(--product-ink);
  font-size:14px;
  line-height:1.95;
}
.product-notice strong{font-weight:600}

.product-details{border-bottom:1px solid var(--product-rule)}
.product-details summary{
  display:flex;
  justify-content:space-between;
  padding:16px 0;
  color:var(--product-ink-soft);
  cursor:pointer;
  font-size:12.5px;
  letter-spacing:.16em;
  list-style:none;
}
.product-details summary::-webkit-details-marker{display:none}
.product-details summary::after{content:"＋";color:var(--product-ink-faint);font-size:12px}
.product-details[open] summary::after{content:"－"}
.product-details-body{
  max-width:36em;
  padding-bottom:22px;
  color:var(--product-ink-soft);
  font-size:13.8px;
  line-height:1.95;
}
.product-details-body p+p{margin-top:.9em}

.product-enquire{
  margin-top:52px;
  padding-top:30px;
  border-top:1px solid var(--product-rule-strong);
}
.product-enquire-title{
  font-family:var(--product-serif);
  font-size:23px;
  letter-spacing:.08em;
}
.product-enquire-lines{margin-top:18px;font-size:14.5px;line-height:2.1}
.product-enquire-lines a{padding-bottom:1px;border-bottom:1px solid var(--product-rule-strong)}
.product-enquire-lines a:hover{border-bottom-color:var(--product-ink)}
.product-enquire-visit{
  max-width:32em;
  margin-top:20px!important;
  color:var(--product-ink-soft);
  font-size:14px;
  line-height:1.95;
}

.product-adjacent{
  display:flex;
  justify-content:flex-start;
  padding:26px 0;
  border-top:1px solid var(--product-rule);
  color:var(--product-ink-soft);
  font-size:13.5px;
  letter-spacing:.08em;
}
.product-adjacent a:hover{color:var(--product-ink)}

.product-load-error{
  min-height:60vh;
  padding:80px 22px;
  text-align:center;
}
.product-load-error h1{font-family:var(--product-serif);font-size:2rem;font-weight:400}
.product-load-error p{margin-top:16px;color:var(--product-ink-soft)}

@media (max-width:820px){
  .product-page{font-size:15px;line-height:1.95}
  .product-sheet{grid-template-columns:1fr;gap:34px;padding:26px 0 64px}
  .product-viewer{position:static}
  .product-name{margin-top:0;font-size:clamp(40px,12vw,54px)}
  .product-light-hint{display:none}
  .product-specs li{grid-template-columns:5em 1fr;gap:12px}
}

@media (max-width:600px){
  .product-shell{padding:0 22px}
  .product-crumb{padding-top:24px}
}

@media (prefers-reduced-motion:reduce){
  .product-page *{transition:none!important}
}