:root{
  --paper:#f5f2ea;
  --paper-2:#ebe7dc;
  --ink:#16130f;
  --ink-2:#4a443c;
  --ink-3:#8a8177;
  --rule:#d6d0c2;
  --rule-2:#c2bbaa;
  --accent:#b8232a;
  --max:1240px;
  --pad:clamp(20px,4vw,56px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Instrument Sans",-apple-system,"Helvetica Neue",sans-serif;
  font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{margin:0;font-family:"Fraunces",Georgia,serif;font-weight:400;letter-spacing:-.02em}
p{margin:0}

.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.sec-num{color:var(--ink-3)}
hr.rule{border:0;border-top:1px solid var(--rule);margin:0}

/* ---------- top bar ---------- */
.bar{
  position:sticky;top:0;z-index:40;
  background:rgba(245,242,234,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--rule);
}
.bar-in{display:flex;align-items:center;gap:clamp(16px,3vw,48px);height:62px}
.brand{display:flex;align-items:baseline;gap:9px;text-decoration:none;white-space:nowrap}
.brand b{font-family:"Fraunces",serif;font-weight:500;font-size:19px;letter-spacing:-.01em}
.brand span{font-family:"IBM Plex Mono",monospace;font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3)}
.bar nav{display:flex;gap:clamp(14px,2.2vw,30px);margin-left:auto}
.bar nav a{
  text-decoration:none;font-size:12.5px;letter-spacing:.02em;color:var(--ink-2);
  padding:4px 0;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;
}
.bar nav a:hover{color:var(--ink);border-color:var(--ink)}
.bar .cta{
  text-decoration:none;font-family:"IBM Plex Mono",monospace;font-size:10.5px;
  letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--ink);padding:9px 15px;transition:background .2s,color .2s;
}
.bar .cta:hover{background:var(--ink);color:var(--paper)}
@media(max-width:880px){.bar nav{display:none}}

/* ---------- hero ---------- */
.hero{padding:clamp(56px,8vw,104px) 0 clamp(40px,5vw,64px)}
.hero-grid{display:grid;grid-template-columns:1.55fr .95fr;gap:clamp(28px,5vw,72px);align-items:start}
.eyebrow{display:flex;align-items:center;gap:11px;margin-bottom:clamp(20px,3vw,32px)}
.eyebrow i{display:block;width:34px;height:1px;background:var(--accent)}
h1{
  font-size:clamp(38px,6.1vw,76px);
  line-height:.98;
  font-variation-settings:"SOFT" 0,"WONK" 1;
}
h1 em{font-style:italic;font-weight:300}
.lede{
  margin-top:clamp(22px,3vw,32px);max-width:44ch;
  font-size:clamp(15.5px,1.5vw,18px);line-height:1.6;color:var(--ink-2);
}
.actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:clamp(26px,3.5vw,38px)}
.btn{
  display:inline-flex;align-items:center;gap:9px;text-decoration:none;
  padding:14px 22px;font-size:13px;font-weight:500;letter-spacing:.01em;
  border:1px solid var(--ink);transition:background .2s,color .2s,transform .2s;
}
.btn.solid{background:var(--ink);color:var(--paper)}
.btn.solid:hover{background:var(--accent);border-color:var(--accent);transform:translateY(-1px)}
.btn.ghost:hover{background:var(--paper-2)}
.btn .arw{font-family:"IBM Plex Mono",monospace;font-size:12px}

/* data sheet */
.sheet{border:1px solid var(--rule-2);background:var(--paper-2);padding:0}
.sheet-top{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 16px;border-bottom:1px solid var(--rule-2);
}
.sheet-top .mono{color:var(--ink-3)}
.sheet dl{margin:0;padding:4px 0}
.sheet .row{
  display:flex;justify-content:space-between;gap:14px;
  padding:13px 16px;border-bottom:1px solid var(--rule);
}
.sheet .row:last-child{border-bottom:0}
.sheet dt{font-size:12.5px;color:var(--ink-2)}
.sheet dd{
  margin:0;font-family:"IBM Plex Mono",monospace;font-size:12.5px;
  font-weight:500;text-align:right;letter-spacing:.01em;
}
.sheet .note{
  padding:12px 16px;border-top:1px solid var(--rule-2);
  font-size:11.5px;color:var(--ink-3);line-height:1.5;
}

/* ---------- trust strip ---------- */
.strip{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:var(--paper-2)}
.strip-in{display:flex;flex-wrap:wrap;gap:0}
.strip-in div{
  flex:1 1 190px;padding:18px clamp(14px,2vw,26px);
  border-right:1px solid var(--rule);
}
.strip-in div:last-child{border-right:0}
.strip-in .k{display:block;font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:5px}
.strip-in .v{font-size:14px;font-weight:500}

/* ---------- sections ---------- */
section{padding:clamp(48px,7vw,92px) 0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:clamp(26px,3.5vw,44px);flex-wrap:wrap}
.sec-head h2{font-size:clamp(26px,3.6vw,42px);line-height:1.05}
.sec-head p{max-width:40ch;font-size:14.5px;color:var(--ink-2);line-height:1.6}

@media(max-width:760px){
  .strip-in div{flex:1 1 50%;border-bottom:1px solid var(--rule)}
  .strip-in div:nth-child(2n){border-right:0}
  .strip-in div:nth-last-child(-n+2){border-bottom:0}
}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.filters button{
  font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;
  background:transparent;border:1px solid var(--rule-2);color:var(--ink-2);
  padding:8px 13px;cursor:pointer;transition:all .18s;
}
.filters button:hover{border-color:var(--ink);color:var(--ink)}
.filters button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}

/* product grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
@media(max-width:1080px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:440px){.grid{grid-template-columns:1fr}}
.card{
  background:var(--paper);display:flex;flex-direction:column;
  transition:background .22s;
}
.card.hide{display:none}
.card:hover{background:#fff}
.card .ph{padding:clamp(14px,2.4vw,26px);display:flex;align-items:center;justify-content:center;aspect-ratio:1/.82}
.card .ph img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .4s cubic-bezier(.2,.7,.3,1)}
.card:hover .ph img{transform:scale(1.045)}
.card .meta{
  margin-top:auto;padding:0 clamp(14px,2.4vw,22px) clamp(15px,2.4vw,22px);
  border-top:1px solid var(--rule);padding-top:13px;
}
.card .model{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.12em;color:var(--accent);text-transform:uppercase}
.card .name{font-family:"Fraunces",serif;font-size:15.5px;line-height:1.3;margin-top:5px;letter-spacing:-.01em}
.card .cat{font-size:11px;color:var(--ink-3);margin-top:6px}

.cta-cell{background:var(--paper-2)}
.cta-cell:hover{background:var(--paper-2)}
.cta-ph{align-items:flex-start;justify-content:flex-start;padding:clamp(18px,2.6vw,28px)}
.cta-line{font-family:"Fraunces",serif;font-size:19px;line-height:1.22;letter-spacing:-.01em;margin-bottom:9px}
.cta-sub{font-size:12.5px;line-height:1.55;color:var(--ink-2)}
.cta-link{
  display:inline-block;margin-top:16px;text-decoration:none;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
}
.cta-link:hover{color:var(--accent);border-color:var(--accent)}

/* capability */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
@media(max-width:840px){.caps{grid-template-columns:1fr}}
.cap{background:var(--paper);padding:clamp(22px,3vw,34px)}
.cap .n{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;color:var(--ink-3)}
.cap h3{font-size:21px;margin:12px 0 10px;line-height:1.2}
.cap p{font-size:14px;color:var(--ink-2);line-height:1.62}

/* contact */
.contact{background:var(--ink);color:var(--paper);padding:clamp(52px,7vw,96px) 0}
.contact h2{font-size:clamp(30px,4.4vw,54px);line-height:1.02;color:var(--paper)}
.contact .lede{color:#b8b1a5}
.contact-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(30px,5vw,64px)}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr}}
.contact a.mail{
  display:inline-block;margin-top:6px;
  font-family:"Fraunces",serif;font-size:clamp(20px,2.6vw,30px);
  color:var(--paper);text-decoration:none;border-bottom:1px solid #4a443c;
  padding-bottom:3px;transition:border-color .2s,color .2s;
}
.contact a.mail:hover{border-color:var(--accent);color:#fff}
.contact dl{margin:0;display:grid;gap:0}
.contact .row{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid #2e2a24}
.contact dt{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:#8a8177;padding-top:3px}
.contact dd{margin:0;font-size:14px;text-align:right;color:#e6e0d4}
.contact .btn{border-color:#4a443c;color:var(--paper)}
.contact .btn:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}

/* footer */
footer{padding:26px 0 34px;border-top:1px solid var(--rule)}
.foot{display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:space-between;align-items:center;font-size:11.5px;color:var(--ink-3)}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink)}

/* reveal */
.rv{opacity:0;transform:translateY(14px);animation:rv .7s cubic-bezier(.2,.7,.3,1) forwards}
@keyframes rv{to{opacity:1;transform:none}}

/* ---------- responsive (kept last so it wins) ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .sheet{max-width:480px}
  .contact-grid{gap:34px}
}
@media(max-width:520px){
  h1{font-size:clamp(31px,8.8vw,42px)}
  .actions{gap:9px}
  .actions .btn{flex:1 1 100%;justify-content:center}
  .card .name{font-size:15px}
}
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;animation:none}
  .card:hover .ph img{transform:none}
}

/* ---------- tech / lens section ---------- */
.tech{display:grid;grid-template-columns:1.02fr 1fr;gap:clamp(26px,4vw,60px);align-items:start}
@media(max-width:900px){.tech{grid-template-columns:1fr}}
.tech-lede{font-size:clamp(15px,1.5vw,17px);line-height:1.65;color:var(--ink-2);max-width:46ch}
.facts{margin-top:30px;border-top:1px solid var(--rule)}
.fact{display:grid;grid-template-columns:106px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--rule)}
.fact dt{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.06em;color:var(--accent);padding-top:3px}
.fact dd{margin:0;font-size:14px;line-height:1.6;color:var(--ink-2)}
.fact dd b{color:var(--ink);font-weight:600}
.chart{border:1px solid var(--rule);background:#fbf9f3;padding:clamp(12px,1.8vw,22px)}
.chart svg{display:block;width:100%;height:auto}
.chart figcaption{font-size:11.5px;color:var(--ink-3);line-height:1.6;margin-top:12px;padding-top:11px;border-top:1px solid var(--rule)}
.legend{display:flex;gap:20px;flex-wrap:wrap;margin-top:2px;margin-bottom:10px;font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.03em;color:var(--ink-2)}
.legend i{display:inline-block;width:22px;height:0;border-top:2.5px solid var(--ink);vertical-align:middle;margin-right:8px}
.legend .dash i{border-top:2px dashed var(--ink-3)}

.coat{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule);margin-top:clamp(30px,4vw,52px)}
@media(max-width:900px){.coat{grid-template-columns:1fr}}
.coat>div{background:var(--paper);padding:clamp(20px,2.4vw,30px)}
.coat .tag{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.1em;
  color:var(--accent);margin-bottom:10px}
.coat h3{font-size:19px;margin:0 0 10px;line-height:1.25}
.coat p{margin:0;font-size:14px;line-height:1.65;color:var(--ink-2)}

.coat-head{margin-top:clamp(34px,4vw,54px);margin-bottom:18px;max-width:52ch}
.coat-head .mono{font-size:11px;letter-spacing:.12em;color:var(--ink-3);margin-bottom:8px}
.coat-head h3{font-size:22px;margin:0 0 8px}
.coat-head p{margin:0;font-size:14px;line-height:1.65;color:var(--ink-2)}
.coat{margin-top:0}

.docs{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule);border-top:0}
@media(max-width:840px){.docs{grid-template-columns:1fr}}
.docs>div{background:var(--paper-2);padding:20px clamp(16px,2vw,24px)}
.docs .k{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.1em;
  color:var(--ink-3);margin-bottom:7px}
.docs .v{font-size:13.5px;line-height:1.6;color:var(--ink-2)}

/* 型号规格表 */
.modeltable{width:100%;border-collapse:collapse;margin-top:26px;font-size:13.5px}
.modeltable th{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3);text-align:left;font-weight:400;
  padding:9px 14px 9px 0;border-bottom:1px solid var(--ink)}
.modeltable td{padding:12px 14px 12px 0;border-bottom:1px solid var(--rule);color:var(--ink-2);
  vertical-align:top}
.modeltable td:first-child{font-family:"IBM Plex Mono",monospace;color:var(--accent);
  font-size:12.5px;letter-spacing:.04em;white-space:nowrap}
@media(max-width:640px){
  .modeltable{font-size:12.5px}
  .modeltable th,.modeltable td{padding-right:10px}
}

/* 单品页两栏 */
.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(26px,4vw,60px);align-items:start;margin-top:14px}
.detail-ph{background:#fbf9f3;border:1px solid var(--rule);padding:clamp(14px,2vw,28px)}
.detail-ph img{display:block;width:100%;height:auto}
@media(max-width:820px){.detail-grid{grid-template-columns:1fr}}

/* 卡片图片可点 */
a.ph{display:block}
a.ph img{transition:opacity .15s}
a.ph:hover img{opacity:.86}

/* 型号索引表 */
.idx-table{width:100%;border-collapse:collapse;margin-top:24px;font-size:13px}
.idx-table th{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3);font-weight:400;text-align:left;
  padding:8px 12px 8px 0;border-bottom:1px solid var(--ink);white-space:nowrap}
.idx-table td{padding:9px 12px 9px 0;border-bottom:1px solid var(--rule);
  color:var(--ink-2);font-variant-numeric:tabular-nums}
.idx-table td:first-child a{font-family:"IBM Plex Mono",monospace;color:var(--accent);
  font-size:12px;text-decoration:none}
.idx-table td:first-child a:hover{text-decoration:underline}

/* 配色色卡 */
.swatch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));
  gap:clamp(10px,1.6vw,18px);margin-top:24px}
.sw{margin:0;background:#fbf9f3;border:1px solid var(--rule);padding:8px;
  display:flex;flex-direction:column;align-items:center}
.sw img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain}
.sw figcaption{font-size:10.5px;letter-spacing:.06em;color:var(--ink-3);margin-top:6px}

/* 首页折叠：默认只显示 12 款 */
.grid:not(.is-all) .more-optical{display:none}
.grid-more{display:flex;justify-content:center;margin-top:clamp(26px,3.4vw,44px)}