/* ============================================================
   光波科技 GB007007 — 官网视觉系统
   石墨底 / 干涉青单一强调 / 中文宋体标题 + 等宽参数
   ============================================================ */

:root{
  --ink:#0A0C0D;
  --graphite:#111415;
  --steel:#181C1D;
  --steel-2:#202628;
  --line:rgba(233,236,234,.10);
  --line-strong:rgba(233,236,234,.22);
  --chalk:#E9ECEA;
  --ash:#8C9598;
  --ash-dim:#5E696C;
  --accent:#17C2B0;
  --accent-dim:rgba(23,194,176,.42);
  --accent-faint:rgba(23,194,176,.09);

  --sans:"Noto Sans SC","Source Han Sans SC",-apple-system,"Segoe UI",sans-serif;
  --serif:"Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --mono:"IBM Plex Mono","Noto Sans Mono",Consolas,monospace;

  --wrap:1280px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--chalk);
  font-family:var(--sans);
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 clamp(20px,4vw,48px);}

[hidden]{display:none !important;}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.hl{color:var(--accent);}

/* ---------- 顶部状态条 ---------- */
.topline{
  background:#07090A;
  border-bottom:1px solid var(--line);
  font-size:12.5px;letter-spacing:.02em;color:var(--ash-dim);
}
.topline-inner{display:flex;justify-content:space-between;gap:16px;align-items:center;height:36px;flex-wrap:wrap;}
.tl-right{display:flex;align-items:center;gap:8px;color:var(--ash);}
.tl-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent-dim);flex:none;}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(10,12,13,.82);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.nav.is-scrolled{background:rgba(8,10,11,.96);border-bottom-color:var(--line-strong);}
.nav-inner{display:flex;align-items:center;gap:28px;height:74px;}

.brand{display:flex;align-items:center;gap:11px;flex:none;}
.brand-mark{width:30px;height:30px;color:var(--accent);flex:none;}
.brand-txt{display:flex;flex-direction:column;line-height:1.1;}
.brand-txt strong{font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:.06em;}
.brand-txt em{font-family:var(--mono);font-style:normal;font-size:10.5px;letter-spacing:.22em;color:var(--ash-dim);margin-top:3px;}

.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14px;color:var(--ash);}
.nav-links a{position:relative;padding:4px 0;transition:color .25s var(--ease);}
.nav-links a:hover{color:var(--chalk);}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;
  background:var(--accent);transition:right .35s var(--ease);
}
.nav-links a:hover::after{right:0;}

.nav-cta{
  flex:none;font-size:13.5px;letter-spacing:.04em;padding:10px 20px;
  border:1px solid var(--line-strong);color:var(--chalk);
  transition:border-color .25s var(--ease),background .25s var(--ease),color .25s var(--ease);
}
.nav-cta:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-faint);}

.nav-toggle{display:none;background:none;border:0;padding:8px;flex-direction:column;gap:5px;align-items:flex-end;}
.nav-toggle span{width:22px;height:1px;background:var(--chalk);display:block;}

/* ---------- HERO ---------- */
.hero{position:relative;padding:clamp(56px,7vw,108px) 0 0;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 78% 12%,rgba(23,194,176,.055),transparent 62%),
    radial-gradient(680px 420px at 8% 88%,rgba(23,194,176,.03),transparent 65%);
  pointer-events:none;
}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(to right,rgba(233,236,234,.045) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(233,236,234,.045) 1px,transparent 1px);
  background-size:112px 112px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 72%);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 72%);
}
.hero-inner{
  position:relative;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.86fr);
  gap:clamp(32px,5vw,72px);align-items:center;
}
.hero-inner > *,
.prod-layout > *,
.tech-layout > *,
.enquiry-layout > *,
.bench-notes > *,
.voice-grid > *,
.footer-inner > *{min-width:0;}

.kicker{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ash);margin:0 0 22px;display:flex;align-items:center;gap:10px;
}
.kicker::before{content:"";width:26px;height:1px;background:var(--accent);flex:none;}

h1{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(42px,5.4vw,74px);line-height:1.14;letter-spacing:.01em;
  margin:0 0 26px;
}
.hero-lede{
  font-size:clamp(15px,1.15vw,16.5px);line-height:1.85;color:var(--ash);
  max-width:34em;margin:0 0 34px;font-weight:300;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:20px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;letter-spacing:.04em;padding:14px 28px;border:1px solid transparent;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .3s var(--ease);
}
.btn-primary{background:var(--accent);color:#04100F;font-weight:500;border-color:var(--accent);}
.btn-primary:hover{background:#1CD8C5;box-shadow:0 0 0 1px rgba(23,194,176,.35),0 12px 34px -14px rgba(23,194,176,.6);transform:translateY(-1px);}
.btn-ghost{border-color:var(--line-strong);color:var(--chalk);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-faint);}

.hero-note{font-size:12.5px;color:var(--ash-dim);letter-spacing:.02em;margin:0;}

/* 干涉图 */
.hero-visual{margin:0;position:relative;}
.fringe-frame{position:relative;}
#fringe{display:block;width:100%;filter:saturate(1.12) drop-shadow(0 0 10px rgba(23,194,176,.16));}
.fringe-meta{
  position:absolute;left:6%;bottom:4%;display:flex;flex-direction:column;gap:2px;
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;
}
.fm-row{display:flex;gap:12px;color:var(--ash-dim);}
.fm-row em{font-style:normal;color:var(--accent);min-width:104px;}
.fm-row span{color:var(--ash-dim);}
.hero-visual figcaption{
  margin-top:14px;font-size:11.5px;letter-spacing:.03em;color:var(--ash-dim);
  display:flex;align-items:center;gap:8px;
}
.hero-visual figcaption::before{content:"";width:14px;height:1px;background:var(--line-strong);}

/* 规格条 */
.spec-strip{
  margin-top:clamp(46px,5.6vw,78px);
  border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:repeat(4,1fr);position:relative;
}
.spec{padding:26px 24px 26px 0;position:relative;}
.spec + .spec{padding-left:28px;}
.spec + .spec::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:1px;background:var(--line);}
.spec-num{
  display:block;font-family:var(--mono);font-weight:500;color:var(--chalk);
  font-size:clamp(26px,2.6vw,34px);line-height:1.1;letter-spacing:-.01em;
}
.spec-num small{font-size:.46em;color:var(--accent);margin-left:5px;letter-spacing:.06em;font-weight:400;}
.spec-key{display:block;margin-top:9px;font-size:12.5px;color:var(--ash);letter-spacing:.02em;}
.spec-disclaimer{
  grid-column:1 / -1;margin:0;padding:10px 0 0;border-top:1px solid var(--line);
  font-size:11.5px;color:var(--ash-dim);letter-spacing:.02em;
}

/* ---------- 通用区块 ---------- */
.section{padding:clamp(64px,7.5vw,112px) 0;position:relative;}
.section-head{max-width:min(100%,1000px);margin-bottom:clamp(40px,5vw,64px);}
h2{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(28px,3.3vw,44px);line-height:1.3;letter-spacing:.01em;
  margin:0 0 20px;text-wrap:balance;
}
.section-lede{color:var(--ash);font-size:15.5px;line-height:1.85;font-weight:300;margin:0;max-width:44em;}

/* ---------- 买家关注 ---------- */
.focus{background:var(--graphite);border-top:1px solid var(--line);}
.focus-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);}
.focus-item{padding:32px 30px 38px 0;position:relative;}
.focus-item + .focus-item{padding-left:30px;border-left:1px solid var(--line);}
.focus-idx{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--accent);margin:0 0 16px;}
.focus-item h3{font-family:var(--serif);font-size:19px;font-weight:600;margin:0 0 12px;letter-spacing:.02em;}
.focus-item p{font-size:14.5px;line-height:1.85;color:var(--ash);font-weight:300;margin:0;}

/* ---------- 产品体系 ---------- */
.prod-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:clamp(28px,4vw,64px);align-items:start;}
.prod-tabs{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.prod-tab{
  display:flex;align-items:center;gap:14px;background:none;border:0;border-bottom:1px solid var(--line);
  text-align:left;padding:16px 4px;color:var(--ash);font-size:14.5px;letter-spacing:.02em;
  transition:color .25s var(--ease),padding-left .3s var(--ease),background .25s var(--ease);
}
.prod-tab span{font-family:var(--mono);font-size:11px;color:var(--ash-dim);transition:color .25s var(--ease);}
.prod-tab:hover{color:var(--chalk);padding-left:10px;}
.prod-tab.is-on{color:var(--chalk);background:linear-gradient(90deg,var(--accent-faint),transparent 70%);padding-left:10px;}
.prod-tab.is-on span{color:var(--accent);}

.prod-panels{position:relative;min-height:380px;}
.prod-panel{display:none;animation:fadeUp .5s var(--ease) both;}
.prod-panel.is-on{display:block;}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}

.prod-panel h3{
  font-family:var(--serif);font-size:clamp(22px,2.2vw,28px);font-weight:600;margin:0 0 14px;letter-spacing:.02em;
}
.prod-panel h3 small{
  display:block;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--ash-dim);text-transform:uppercase;font-weight:400;margin-top:10px;
}
.prod-desc{font-size:15.5px;line-height:1.85;color:var(--ash);max-width:44em;margin:0 0 26px;font-weight:300;}

.spec-table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:14px;}
.spec-table th{
  text-align:left;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ash);font-weight:500;padding:0 16px 10px 0;border-bottom:1px solid var(--line-strong);
}
.spec-table td{padding:13px 16px 13px 0;border-bottom:1px solid var(--line);color:var(--ash);vertical-align:top;}
.spec-table td:first-child{color:var(--chalk);white-space:nowrap;}
.spec-table .mono{color:var(--chalk);font-size:13px;letter-spacing:.01em;}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;padding:0;list-style:none;}
.tag-row li{
  font-size:12px;letter-spacing:.03em;color:var(--ash);padding:5px 11px;
  border:1px solid var(--line);background:rgba(233,236,234,.02);
}
.prod-foot{
  font-size:13.5px;color:var(--ash);margin:0;padding-left:14px;border-left:2px solid var(--accent-dim);
  line-height:1.8;
}
.serve-list{display:grid;gap:0;margin:0 0 22px;padding:0;list-style:none;border-top:1px solid var(--line);}
.serve-list li{display:grid;grid-template-columns:170px minmax(0,1fr);gap:18px;padding:15px 0;border-bottom:1px solid var(--line);}
.serve-list strong{font-family:var(--serif);font-size:15.5px;font-weight:600;letter-spacing:.02em;}
.serve-list span{font-size:14px;color:var(--ash);font-weight:300;}

/* ---------- 技术底座 ---------- */
.tech{background:var(--graphite);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.tech-layout{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,5vw,80px);align-items:start;}
.cutaway{
  margin:0;padding:28px;border:1px solid var(--line);background:var(--ink);position:sticky;top:110px;
}
.cutaway svg{width:100%;display:block;}
.cutaway figcaption{font-size:11.5px;color:var(--ash-dim);letter-spacing:.02em;margin-top:14px;line-height:1.7;}

.tech-list{display:grid;gap:0;border-top:1px solid var(--line);}
.tech-item{display:grid;grid-template-columns:44px minmax(0,1fr);grid-template-areas:"idx title" "idx body";gap:0 20px;padding:24px 0;border-bottom:1px solid var(--line);}
.tech-idx{grid-area:idx;font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.1em;margin:0;padding-top:3px;}
.tech-item h3{grid-area:title;font-family:var(--serif);font-size:18px;font-weight:600;margin:0 0 8px;letter-spacing:.02em;}
.tech-item p{grid-area:body;font-size:14.5px;line-height:1.85;color:var(--ash);margin:0;font-weight:300;}

/* ---------- 应用行业 ---------- */
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);}
.ind-card{
  padding:clamp(22px,2.4vw,34px);border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  transition:background .35s var(--ease);
  position:relative;overflow:hidden;
}
.ind-card::after{
  content:"";position:absolute;left:0;top:0;width:2px;height:0;background:var(--accent);
  transition:height .4s var(--ease);
}
.ind-card:hover{background:rgba(233,236,234,.025);}
.ind-card:hover::after{height:100%;}
.ind-card h3{font-family:var(--serif);font-size:19px;font-weight:600;margin:0 0 12px;letter-spacing:.03em;}
.ind-card p{font-size:14px;line-height:1.85;color:var(--ash);margin:0 0 14px;font-weight:300;}
.ind-meta{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--ash-dim);margin:0;}

/* ---------- 对标 ---------- */
.bench{background:var(--graphite);border-top:1px solid var(--line);}
.bench-table-wrap{overflow-x:auto;border-top:1px solid var(--line-strong);-webkit-overflow-scrolling:touch;}
.table-hint{
  display:none;font-size:11px;letter-spacing:.08em;color:var(--ash-dim);
  margin:12px 0 0;text-align:right;
}
.bench-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:860px;}
.bench-table th{
  text-align:left;padding:14px 18px 14px 0;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ash);font-weight:500;
  border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
.bench-table td{padding:18px 18px 18px 0;border-bottom:1px solid var(--line);color:var(--ash);vertical-align:top;line-height:1.7;}
.bench-table td strong{color:var(--chalk);font-weight:500;font-family:var(--serif);font-size:14.5px;letter-spacing:.02em;}
.bench-table td.mono{color:var(--chalk);font-size:12.5px;}
.bench-table tr:hover td{background:rgba(233,236,234,.02);}
.bench-self td{background:var(--accent-faint);border-bottom:1px solid rgba(23,194,176,.28);}
.bench-self td:first-child strong{color:var(--accent);}

.bench-notes{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(32px,5vw,72px);margin-top:clamp(40px,5vw,64px);}
.bench-notes h3{font-family:var(--serif);font-size:20px;font-weight:600;margin:0 0 22px;letter-spacing:.02em;}
.adv-list{margin:0;padding:0;list-style:none;display:grid;gap:18px;counter-reset:a;}
.adv-list li{position:relative;padding-left:34px;font-size:14.5px;line-height:1.85;color:var(--ash);font-weight:300;}
.adv-list li::before{
  counter-increment:a;content:counter(a,decimal-leading-zero);position:absolute;left:0;top:3px;
  font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.1em;
}
.adv-list li strong{display:block;color:var(--chalk);font-family:var(--serif);font-size:15.5px;font-weight:600;margin-bottom:4px;letter-spacing:.02em;}
.bench-notes article > p{font-size:14.5px;line-height:1.9;color:var(--ash);margin:0 0 22px;font-weight:300;}
.bench-source{font-size:11.5px !important;color:var(--ash-dim) !important;line-height:1.8 !important;border-top:1px solid var(--line);padding-top:16px;}

/* ---------- 客户声音 ---------- */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);}
.voice{margin:0;padding:clamp(24px,2.6vw,36px) clamp(22px,2.4vw,34px) clamp(24px,2.6vw,34px) 0;position:relative;}
.voice + .voice{padding-left:clamp(22px,2.4vw,34px);border-left:1px solid var(--line);}
.voice blockquote{
  margin:0 0 24px;font-family:var(--serif);font-size:17px;line-height:1.95;font-weight:500;
  color:var(--chalk);letter-spacing:.01em;position:relative;
}
.voice blockquote::before{
  content:"";display:block;width:20px;height:1px;background:var(--accent);margin-bottom:18px;
}
.voice figcaption{display:flex;flex-direction:column;gap:4px;}
.voice figcaption strong{font-size:14px;font-weight:500;letter-spacing:.03em;}
.voice figcaption span{font-family:var(--mono);font-size:11px;color:var(--ash-dim);letter-spacing:.05em;}
.voice-note{margin:26px 0 0;font-size:11.5px;color:var(--ash-dim);letter-spacing:.02em;}

/* ---------- 公信力 ---------- */
.trust{background:var(--graphite);border-top:1px solid var(--line);}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);margin-bottom:clamp(44px,5vw,72px);}
.trust-cell{padding:clamp(22px,2.4vw,32px);border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
.trust-num{
  display:block;font-family:var(--mono);font-size:clamp(26px,2.8vw,36px);font-weight:500;
  color:var(--accent);letter-spacing:-.01em;line-height:1.1;margin-bottom:14px;
}
.trust-cell h3{font-family:var(--serif);font-size:16px;font-weight:600;margin:0 0 10px;letter-spacing:.02em;}
.trust-cell p{font-size:13.5px;color:var(--ash);line-height:1.8;margin:0;font-weight:300;}
.org-note{font-family:var(--sans);font-size:11.5px;font-weight:400;color:var(--ash-dim);letter-spacing:.04em;margin-left:6px;}

.trust-org{margin-bottom:clamp(40px,4.5vw,64px);}
.trust-org h3,.trust-doc h3{font-family:var(--serif);font-size:18px;font-weight:600;margin:0 0 22px;letter-spacing:.02em;padding-bottom:14px;border-bottom:1px solid var(--line);}
.org-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0;padding:0;list-style:none;border-top:0;}
.org-list li{display:flex;flex-direction:column;gap:5px;padding:16px 20px 16px 0;border-bottom:1px solid var(--line);}
.org-list li span{font-family:var(--serif);font-size:16px;font-weight:500;letter-spacing:.04em;}
.org-list li em{font-family:var(--mono);font-style:normal;font-size:11px;color:var(--ash-dim);letter-spacing:.08em;}

.doc-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 40px;margin:0;padding:0;list-style:none;}
.doc-list li{font-size:14px;color:var(--ash);padding-left:18px;position:relative;line-height:1.7;font-weight:300;}
.doc-list li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:1px;background:var(--accent-dim);}

/* ---------- 询价 ---------- */
.enquiry{border-top:1px solid var(--line-strong);}
.enquiry-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1fr);gap:clamp(36px,5vw,80px);align-items:start;}
.enquiry-lede{font-size:15px;line-height:1.85;color:var(--ash);max-width:36em;margin:0 0 40px;font-weight:300;}

.contact-block{border-top:1px solid var(--line);}
.contact-row{display:grid;grid-template-columns:88px minmax(0,1fr) auto;gap:16px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;}
.contact-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--ash-dim);text-transform:uppercase;}
.contact-row a.mono{font-size:16px;letter-spacing:.02em;color:var(--chalk);transition:color .25s var(--ease);}
.contact-row a.mono:hover{color:var(--accent);}
.contact-name{font-size:12.5px;color:var(--ash-dim);white-space:nowrap;}
.contact-row span:not(.contact-label):not(.contact-name){color:var(--ash);}

.enquiry-form{border:1px solid var(--line);padding:clamp(22px,2.6vw,34px);background:rgba(233,236,234,.015);}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.f-row label,.enquiry-form > label{display:block;font-size:12px;letter-spacing:.06em;color:var(--ash);}
.f-row label.wide,.enquiry-form > label{grid-column:1 / -1;}
input,select,textarea{
  width:100%;margin-top:7px;background:rgba(10,12,13,.7);border:1px solid var(--line);
  color:var(--chalk);font-family:inherit;font-size:14px;padding:11px 13px;
  transition:border-color .25s var(--ease),background .25s var(--ease);
  border-radius:0;appearance:none;-webkit-appearance:none;
}
select{background-image:linear-gradient(45deg,transparent 50%,var(--ash-dim) 50%),linear-gradient(135deg,var(--ash-dim) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:34px;}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-dim);background:rgba(10,12,13,.9);}
input::placeholder,textarea::placeholder{color:var(--ash-dim);}
textarea{resize:vertical;}
.enquiry-form > label{margin-bottom:16px;}
.f-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:8px;}
.f-hint{font-size:11.5px;color:var(--ash-dim);letter-spacing:.02em;}
.f-output{
  margin:18px 0 0;padding:16px;border:1px solid rgba(23,194,176,.28);background:rgba(23,194,176,.05);
  font-family:var(--mono);font-size:12px;line-height:1.9;color:var(--chalk);white-space:pre-wrap;word-break:break-word;
}
.f-output:not([hidden]){display:block;}

/* ---------- FAQ ---------- */
.faq{background:var(--graphite);border-top:1px solid var(--line);}
.faq-list{border-top:1px solid var(--line-strong);}
.faq-list details{border-bottom:1px solid var(--line);}
.faq-list summary{
  list-style:none;cursor:pointer;padding:22px 40px 22px 0;position:relative;
  font-family:var(--serif);font-size:16.5px;font-weight:500;letter-spacing:.02em;color:var(--chalk);
  transition:color .25s var(--ease);
}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{
  content:"";position:absolute;right:6px;top:50%;width:11px;height:11px;
  border-right:1px solid var(--ash);border-bottom:1px solid var(--ash);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s var(--ease),border-color .25s var(--ease);
}
.faq-list details[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--accent);}
.faq-list summary:hover{color:var(--accent);}
.faq-list details p{margin:0;padding:0 40px 24px 0;font-size:14.5px;line-height:1.9;color:var(--ash);max-width:60em;font-weight:300;}

/* ---------- FOOTER ---------- */
.footer{background:#07090A;border-top:1px solid var(--line-strong);padding:clamp(48px,6vw,78px) 0 0;}
.footer-inner{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.4fr);gap:clamp(32px,5vw,64px);}
.footer-brand{display:flex;gap:14px;align-items:flex-start;}
.footer-brand .brand-mark{width:34px;height:34px;color:var(--accent);flex:none;margin-top:2px;}
.footer-brand strong{font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:.04em;display:block;margin-bottom:10px;}
.footer-brand p{font-size:12.5px;color:var(--ash-dim);line-height:1.9;margin:0;max-width:30em;}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.footer-cols h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ash-dim);font-weight:500;margin:0 0 16px;}
.footer-cols a,.footer-cols span{display:block;font-size:13px;color:var(--ash);line-height:2;transition:color .25s var(--ease);}
.footer-cols a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:clamp(40px,5vw,64px);padding-top:18px;padding-bottom:26px;
  border-top:1px solid var(--line);font-size:11.5px;color:var(--ash-dim);letter-spacing:.02em;
}
.footer-bottom .icp{
  color:var(--ash);border-bottom:1px solid transparent;
  transition:color .25s var(--ease),border-color .25s var(--ease);white-space:nowrap;
}
.footer-bottom .icp::before{content:"· ";}
.footer-bottom .icp:hover{color:var(--accent);border-bottom-color:var(--accent-dim);}
.footer-bottom .icp-note{color:var(--ash);white-space:nowrap;margin-left:.55em;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .prod-panel{animation:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:minmax(0,1fr);}
  .hero-visual{max-width:440px;width:100%;margin-top:8px;}
  .focus-grid{grid-template-columns:repeat(2,1fr);}
  .focus-item:nth-child(3){border-left:0;padding-left:0;}
  .focus-item:nth-child(3),.focus-item:nth-child(4){border-top:1px solid var(--line);}
  .ind-grid{grid-template-columns:repeat(2,1fr);}
  .voice-grid{grid-template-columns:1fr;}
  .voice,.voice + .voice{border-left:0;padding-left:0;border-top:1px solid var(--line);}
  .voice:first-child{border-top:0;}
  .trust-grid{grid-template-columns:repeat(2,1fr);}
  .org-list{grid-template-columns:repeat(2,1fr);}
  .bench-notes{grid-template-columns:1fr;}
  .enquiry-layout{grid-template-columns:1fr;}
  .prod-layout{grid-template-columns:1fr;}
  .prod-tabs{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);}
  .prod-tab{border-right:1px solid var(--line);}
  .tech-layout{grid-template-columns:1fr;}
  .cutaway{position:static;max-width:460px;}
  .doc-list{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr;}
}

@media (max-width:720px){
  body{font-size:15px;}
  .wrap{padding-left:20px;padding-right:20px;}
  h1{font-size:clamp(34px,10.4vw,46px);}
  .hero-lede{font-size:14.5px;}
  .topline-inner{height:auto;padding:8px 0;font-size:11px;line-height:1.6;}
  .tl-left{display:none;}
  .nav-inner{height:62px;gap:16px;}
  .nav-links{display:none;}
  .nav-cta{padding:8px 14px;font-size:12.5px;}
  .nav-toggle{display:flex;}
  .nav.is-open .nav-links{
    display:flex;flex-direction:column;gap:0;position:absolute;left:0;right:0;top:100%;
    background:rgba(8,10,11,.98);border-bottom:1px solid var(--line-strong);padding:8px clamp(20px,4vw,48px) 18px;
  }
  .nav.is-open .nav-links a{padding:12px 0;border-bottom:1px solid var(--line);}
  .nav.is-open .nav-links a::after{display:none;}

  .spec-strip{grid-template-columns:1fr 1fr;}
  .spec{padding:20px 16px 20px 0;}
  .spec:nth-child(3){padding-left:0;border-top:1px solid var(--line);}
  .spec:nth-child(3)::before{display:none;}
  .spec:nth-child(4){border-top:1px solid var(--line);}
  .spec-key{font-size:11.5px;}

  .focus-grid{grid-template-columns:1fr;}
  .focus-item,.focus-item + .focus-item{padding-left:0;border-left:0;border-top:1px solid var(--line);}
  .focus-item:first-child{border-top:0;}
  .ind-grid{grid-template-columns:1fr;}
  .trust-grid{grid-template-columns:1fr;}
  .org-list{grid-template-columns:1fr;}
  .footer-cols{grid-template-columns:1fr 1fr;}
  .f-row{grid-template-columns:1fr;}
  .contact-row{grid-template-columns:80px minmax(0,1fr);}
  .contact-name{grid-column:2;}
  .serve-list li{grid-template-columns:1fr;gap:6px;}
  .faq-list summary{font-size:15px;padding-right:32px;}
  .faq-list details p{padding-right:0;}
  .table-hint{display:block;}
}
/* ---------- language switcher ---------- */
.lang{position:relative;margin-left:14px;flex:0 0 auto;}
.lang-btn{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 11px;
  background:transparent;border:1px solid var(--line-strong);color:var(--chalk);
  font-family:var(--sans);font-size:12px;letter-spacing:.02em;cursor:pointer;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.lang-btn:hover,.lang.is-open .lang-btn{border-color:var(--accent);color:var(--accent);}
.lang-flag{width:22px;height:15px;flex:0 0 auto;border-radius:1px;overflow:hidden;display:block;
  box-shadow:0 0 0 1px rgba(255,255,255,.16);}
.lang-flag svg{width:100%;height:100%;display:block;}
.lang-name{white-space:nowrap;}
.lang-caret{width:7px;height:7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform .25s var(--ease);}
.lang.is-open .lang-caret{transform:rotate(225deg) translateY(-1px);}
.lang-menu{
  position:absolute;right:0;top:calc(100% + 8px);z-index:60;min-width:216px;padding:5px;
  background:rgba(10,12,13,.98);border:1px solid var(--line-strong);
  box-shadow:0 18px 44px rgba(0,0,0,.6);display:none;max-height:min(72vh,540px);overflow:auto;
  scrollbar-width:thin;
}
.lang.is-open .lang-menu{display:block;}
.lang-menu button{
  display:flex;align-items:center;gap:10px;width:100%;padding:8px 10px;
  background:none;border:0;color:var(--ash);font-family:var(--sans);font-size:12.5px;
  text-align:left;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease);
}
.lang-menu button:hover{background:var(--accent-faint);color:var(--accent);}
.lang-menu button[aria-selected="true"]{color:var(--accent);}
.lm-flag{width:20px;height:14px;flex:0 0 auto;border-radius:1px;overflow:hidden;}
.lm-flag svg{width:100%;height:100%;display:block;}
.lm-name{flex:1;white-space:nowrap;}
.lm-code{font-family:var(--mono);font-size:10px;opacity:.5;letter-spacing:.08em;}

@media (max-width:1080px){
  .lang{margin-left:8px;}
  .lang-btn{height:34px;padding:0 9px;font-size:11.5px;}
  .lang-name{display:none;}
  .lang-menu{right:-56px;min-width:200px;}
}
@media (max-width:640px){
  .lang-menu{right:-24px;}
}
@media (max-width:1500px){
  .nav-inner{
    display:grid;grid-template-columns:1fr auto;grid-template-areas:"brand lang" "cta links";
    align-items:center;height:auto;padding-top:8px;padding-bottom:10px;gap:8px 10px;
  }
  .nav-links{grid-area:links;justify-self:end;margin-left:0;gap:20px;font-size:13px;}
  .brand{grid-area:brand;min-width:0;}
  .lang{grid-area:lang;margin-left:0;justify-self:end;}
  .nav-toggle{grid-area:toggle;justify-self:end;align-self:center;}
  .nav-cta{grid-area:cta;justify-self:start;text-align:center;padding:9px 16px;font-size:12.5px;}
  .lang-menu{right:0;min-width:196px;}
}
@media (max-width:1080px){
  .nav-inner{grid-template-areas:"brand lang" "cta toggle";}
}
/* ---------- 多语言长词断行 ---------- */
h1,h2,h3,.hero-lede,.section-lede{overflow-wrap:break-word;hyphens:auto;}
html:is([lang="de"],[lang="ru"]) h1{font-size:clamp(34px,5vw,72px);letter-spacing:0;hyphens:manual;}

/* ---------- RTL：阿拉伯语版式 ---------- */
html[dir="rtl"] body{text-align:right;}
html[dir="rtl"] .lang{margin-left:0;margin-right:14px;}
html[dir="rtl"] .lang-menu{right:auto;left:0;}
html[dir="rtl"] .spec{padding:26px 0 26px 24px;}
html[dir="rtl"] .spec-strip .spec:last-child{padding-left:0;}
html[dir="rtl"] .focus-item{padding:32px 0 38px 30px;}
html[dir="rtl"] .voice{padding:clamp(24px,2.6vw,36px) 0 clamp(24px,2.6vw,34px) clamp(22px,2.4vw,34px);}
html[dir="rtl"] .spec-table td{padding:13px 0 13px 16px;}
html[dir="rtl"] .contact-row{grid-template-columns:88px minmax(0,1fr) auto;}
html[dir="rtl"] .ind-grid{border-left:0;border-right:1px solid var(--line);}
html[dir="rtl"] .trust-grid{border-left:0;border-right:1px solid var(--line);}
html[dir="rtl"] .trust-cell{border-right:0;border-left:1px solid var(--line);}
html[dir="rtl"] .mono{direction:ltr;unicode-bidi:isolate;display:inline-block;}
html[dir="rtl"] .nav-links a::after{left:auto;right:0;}
html[dir="rtl"] .nav-links a:hover::after{left:0;right:auto;}
html[dir="rtl"] .lang-caret{margin-left:0;margin-right:6px;}
html[dir="rtl"] .org-note{margin-left:0;margin-right:6px;}
html[dir="rtl"] .f-row > *{text-align:right;}
html[dir="rtl"] input,html[dir="rtl"] textarea,html[dir="rtl"] select{text-align:right;}
html[dir="rtl"] .bench-table th,html[dir="rtl"] .bench-table td{text-align:right;}
html[dir="rtl"] .lm-name,html[dir="rtl"] .lm-code{direction:rtl;}
@media (max-width:1080px){html[dir="rtl"] .lang-menu{right:auto;left:-56px;}}
@media (max-width:640px){html[dir="rtl"] .lang-menu{left:-24px;}}

/* ---------- 首页产品区：通往参数中心 ---------- */
.prod-more{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:clamp(18px,3vw,40px);
  align-items:center;margin-top:clamp(28px,3.4vw,44px);padding:clamp(20px,2.4vw,30px);
  border:1px solid var(--line);background:rgba(23,194,176,.035);
}
.prod-more h3{font-family:var(--serif);font-size:clamp(18px,1.9vw,22px);font-weight:600;margin:0 0 10px;letter-spacing:.02em;}
.prod-more p{font-size:13.5px;line-height:1.9;color:var(--ash);margin:0;font-weight:300;max-width:52em;}
.prod-more > a{white-space:nowrap;}
@media (max-width:760px){.prod-more{grid-template-columns:1fr;}.prod-more > a{justify-self:start;}}
html[dir="rtl"] .prod-more > a{direction:rtl;}

/* ---------- 页脚联系小注 ---------- */
.f-note{font-size:.82em;letter-spacing:0;opacity:.62;margin-left:.28em;}

/* ---------- 产品卡现场录像 ---------- */
.pv-btn{display:inline-flex;align-items:center;gap:.5em;margin:0 0 .2rem;padding:.35rem .65rem;
  border:1px solid rgba(23,194,176,.45);border-radius:2px;background:transparent;color:inherit;
  font:inherit;font-size:.78rem;letter-spacing:.08em;opacity:.85;cursor:pointer;transition:background .18s,opacity .18s;}
.pv-btn:hover{background:rgba(23,194,176,.12);opacity:1;}
.pv-btn .pv-ico{font-size:.85em;line-height:1;color:#17C2B0;}
.pv-btn .pv-dur{font-family:var(--mono,monospace);}
.pv-video{display:block;width:100%;max-height:70vh;background:#000;object-fit:contain;}
html[dir="rtl"] .pv-btn{direction:rtl;}

/* ============================================================
   香槟金点缀层（champagne accent）
   干涉青继续做功能色（数据、链接高亮、主按钮）
   香槟金只做「金属框架 / 次级强调」，不替换主调
   ============================================================ */
:root{
  --champagne:#E8D6B4;
  --champagne-deep:#C9A96A;
  --champagne-faint:rgba(232,214,180,.10);
  --champagne-line:rgba(232,214,180,.26);
  --champagne-line-soft:rgba(232,214,180,.16);
}

/* 首屏：在干涉青旁边补一层香槟冷光 */
.hero::before{
  background:
    radial-gradient(900px 520px at 78% 12%,rgba(23,194,176,.055),transparent 62%),
    radial-gradient(680px 460px at 10% 4%,rgba(232,214,180,.050),transparent 66%),
    radial-gradient(680px 420px at 8% 88%,rgba(23,194,176,.03),transparent 65%);
}

/* 小标题：香槟字 + 香槟短横 */
.kicker{color:var(--champagne);}
.kicker::before{background:var(--champagne);}

/* 规格条：上下线改香槟 */
.spec-strip{border-top:1px solid var(--champagne-line);border-bottom:1px solid var(--champagne-line-soft);}

/* 主按钮：青底加一圈香槟金属内描边 */
.btn-primary{box-shadow:inset 0 0 0 1px rgba(232,214,180,.42);}
.btn-primary:hover{box-shadow:inset 0 0 0 1px rgba(232,214,180,.78),0 12px 34px -14px rgba(201,169,106,.55);}

/* 次级按钮 hover 走香槟 */
.btn-ghost:hover{border-color:var(--champagne);color:var(--champagne);background:var(--champagne-faint);}

/* 导航右上询价按钮 */
.nav-cta{border-color:var(--champagne-line);}
.nav-cta:hover{border-color:var(--champagne);color:var(--champagne);background:var(--champagne-faint);}

/* 成绩类大数字改香槟（参数类小数字仍用青） */
.trust-num{color:var(--champagne);}

/* 引用横线 / 文档条目前缀 / 行业卡 hover 竖条 */
.voice blockquote::before{background:var(--champagne);}
.doc-list li::before{background:var(--champagne-deep);}
.ind-card::after{background:var(--champagne);}

/* 对标表：自评行由青改香槟，行 hover 也偏香槟 */
.bench-self td{background:var(--champagne-faint);border-bottom:1px solid var(--champagne-line);}
.bench-self td:first-child strong{color:var(--champagne);}
.bench-table tr:hover td{background:rgba(232,214,180,.035);}

/* 首页通往参数中心的入口条 */
.prod-more{border-color:var(--champagne-line);background:rgba(232,214,180,.035);}

/* 页脚：顶线与版权分隔线走香槟 */
.footer{border-top:1px solid var(--champagne-line);}
.footer-bottom{border-top:1px solid var(--champagne-line-soft);}
.footer-cols a:hover{color:var(--champagne);}

/* 联系方式与表单 */
.contact-row a.mono:hover{color:var(--champagne);}
input:focus,select:focus,textarea:focus{border-color:var(--champagne-line);}

/* 产品卡录像按钮 */
.pv-btn{border-color:rgba(232,214,180,.42);}
.pv-btn:hover{background:rgba(232,214,180,.12);}
.pv-btn .pv-ico{color:var(--champagne);}