/* ============================================================
   TIDETRUST — styles
   Palette: deep navy (brand blue from logo) + signal orange
   ============================================================ */

:root{
  --navy:#0A1826; --navy-2:#0E2233; --navy-3:#143047;
  --blue:#1F5C8B; --blue-2:#2E7BB8; --blue-soft:#DDE9F2;
  --accent:#E8631A; --accent-2:#FF7A2E;
  --paper:#FFFFFF; --paper-alt:#F4F7FA;
  --tx:#16232E; --tx-2:#5A6B78; --tx-inv:#EAF1F6; --tx-inv-2:#9DB2C2;
  --line:#E2E8EE; --line-inv:rgba(255,255,255,.14);
  --font-sans:"Inter","PingFang SC","Microsoft YaHei","Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",sans-serif;
  --mono:ui-monospace,"SF Mono",Consolas,"JetBrains Mono",monospace;
  --wrap:1180px;
  --r:14px; --r-sm:8px;
  --shadow:0 20px 60px -24px rgba(10,24,38,.35);
  --ease:cubic-bezier(.22,.61,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html[data-lang="zh"]{letter-spacing:.01em}
body{font-family:var(--font-sans);color:var(--tx);background:var(--paper);line-height:1.65;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}

h1,h2,h3{line-height:1.12;font-weight:750;letter-spacing:-.022em}
html[data-lang="zh"] h1,html[data-lang="zh"] h2,html[data-lang="zh"] h3{letter-spacing:.02em;font-weight:650}
h2{font-size:clamp(30px,4.4vw,46px)}
h3{font-size:20px}

/* ---------- top bar ---------- */
.topbar{height:2px;background:var(--accent)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border-radius:999px;white-space:nowrap;
  font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;background:transparent;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,color .25s,border-color .25s}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-2);transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(232,99,26,.55)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:13.5px}

/* ---------- eyebrow ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--blue-2);font-weight:600}
html[data-lang="zh"] .eyebrow{letter-spacing:.3em}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:0 0 auto;
  box-shadow:0 0 0 3px rgba(232,99,26,.18)}

/* ============ HEADER ============ */
.site-header{position:fixed;inset:0 0 auto;z-index:60;padding:14px 0;
  transition:background .35s,box-shadow .35s,padding .35s}
.site-header.is-scrolled{background:rgba(8,20,32,.86);backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line-inv);padding:8px 0}
.header-inner{display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;color:#fff;flex-shrink:0}
.brand-logo{height:58px;width:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.brand-script{height:20px;width:auto;display:block}
.site-header.is-scrolled .brand-logo{height:48px}
.site-header.is-scrolled .brand-script{height:17px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:17px;letter-spacing:.12em;font-weight:800}
.brand-text em{font-style:normal;font-family:var(--mono);font-size:8.5px;letter-spacing:.32em;color:var(--tx-inv-2);margin-top:3px;white-space:nowrap}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{color:var(--tx-inv);font-size:14.5px;font-weight:500;opacity:.85;position:relative;padding:6px 0;white-space:nowrap}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);border-radius:2px;transition:width .3s var(--ease)}
.nav a:hover{opacity:1}
.nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:16px}
.lang{display:flex;gap:2px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);
  border-radius:999px;padding:3px}
.lang-btn{border:0;background:transparent;color:var(--tx-inv-2);font-size:12px;font-weight:600;
  padding:5px 12px;border-radius:999px;cursor:pointer;font-family:inherit;transition:background .2s,color .2s;white-space:nowrap}
.lang-btn:hover{color:#fff}
.lang-btn.is-active{background:#fff;color:var(--navy)}
.burger{display:none;background:0;border:0;width:38px;height:38px;cursor:pointer;flex-direction:column;
  justify-content:center;gap:5px;align-items:center}
.burger span{width:20px;height:2px;background:#fff;border-radius:2px;transition:.3s}

/* ============ HERO ============ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  color:#fff;overflow:hidden;background:var(--navy)}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  filter:saturate(.82) contrast(1.05);
  opacity:0;transition:opacity 1.4s ease;will-change:opacity}
.hero-video.is-active{opacity:1;animation:heroZoom 18s var(--ease) forwards}
@keyframes heroZoom{from{transform:scale(1.08)}to{transform:scale(1)}}
.hero-veil{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,18,29,.92) 0%,rgba(9,25,40,.78) 42%,rgba(10,26,42,.35) 75%,rgba(10,26,42,.55) 100%),
             linear-gradient(to top,rgba(7,18,29,.95) 0%,transparent 34%)}
.hero-grid{position:relative;z-index:2;width:100%;padding-top:110px;padding-bottom:40px}
.hero-copy{max-width:640px}
.hero-copy > *{opacity:0;transform:translateY(26px);animation:riseIn .9s var(--ease) forwards}
.hero-copy .eyebrow{animation-delay:.15s}
.hero-title{animation-delay:.28s;font-size:clamp(44px,7vw,84px);margin:18px 0 22px;
  color:#fff;text-shadow:0 2px 30px rgba(0,0,0,.35)}
.hero-title span{display:inline-block}
.hero-desc{animation-delay:.42s;font-size:17px;line-height:1.7;color:var(--tx-inv);max-width:520px}
.hero-actions{animation-delay:.55s;display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
@keyframes riseIn{to{opacity:1;transform:none}}

.hero-foot{position:relative;z-index:2;width:100%;padding-bottom:64px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  border:1px solid var(--line-inv);border-radius:var(--r);
  overflow:hidden;backdrop-filter:blur(10px);background:rgba(10,26,42,.42)}
.stats > div{background:rgba(9,22,35,.55);padding:20px 24px}
.stats dt{font-size:clamp(24px,3vw,34px);font-weight:780;letter-spacing:-.02em;color:#fff;
  font-variant-numeric:tabular-nums}
.stats dd{font-size:12.5px;color:var(--tx-inv-2);margin-top:2px;letter-spacing:.04em}

.scroll-cue{position:absolute;left:50%;bottom:18px;z-index:3;width:22px;height:36px;
  border:1.6px solid rgba(255,255,255,.4);border-radius:12px;transform:translateX(-50%)}
.scroll-cue::after{content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;margin-left:-1.5px;
  border-radius:2px;background:#fff;animation:cueDrop 1.8s ease-in-out infinite}
@keyframes cueDrop{0%{transform:translateY(0);opacity:1}70%{transform:translateY(11px);opacity:0}100%{opacity:0}}

/* ============ STRIP ============ */
.strip{background:var(--navy);color:var(--tx-inv-2);border-top:1px solid var(--line-inv);
  overflow:hidden;padding:14px 0}
.strip-track{display:flex;gap:34px;align-items:center;white-space:nowrap;width:max-content;
  animation:marquee 30s linear infinite}
.strip-track span{font-family:var(--mono);font-size:12px;letter-spacing:.18em}
.strip-track i{width:5px;height:5px;border-radius:50%;background:var(--accent);flex:0 0 auto}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ============ SECTIONS ============ */
.section{padding:110px 0}
.section-alt{background:var(--paper-alt)}
.section-dark{background:var(--navy);color:var(--tx-inv)}
.section-dark h2,.section-dark h3{color:#fff}
.sec-head{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:end;margin-bottom:60px}
.sec-head h2{margin-top:16px}
.sec-desc{color:var(--tx-2);font-size:15.5px}
.section-dark .sec-desc{color:var(--tx-inv-2)}

/* ============ PRODUCTS ============ */
.pfilter{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 34px}
.pf-btn{border:1px solid var(--line);background:#fff;color:var(--tx-2);font:inherit;font-size:13.5px;
  font-weight:600;padding:9px 18px;border-radius:999px;cursor:pointer;
  transition:color .2s,border-color .2s,background .2s}
.pf-btn:hover{border-color:var(--blue);color:var(--blue)}
.pf-btn.is-active{background:var(--navy);border-color:var(--navy);color:#fff}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  cursor:pointer;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;
  display:flex;flex-direction:column}
.pcard.is-hidden,.pcard.is-cut{display:none}
.pgrid-more{display:flex;align-items:center;justify-content:center;gap:11px;width:fit-content;
  margin:34px auto 0;padding:13px 26px;background:#fff;border:1px solid var(--line);
  border-radius:999px;cursor:pointer;font-family:var(--mono);font-size:12px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--tx);
  transition:border-color .25s,color .25s,transform .25s var(--ease),box-shadow .25s}
.pgrid-more:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);
  box-shadow:0 14px 30px -18px rgba(10,24,38,.4)}
.pgrid-more[hidden]{display:none}
.pm-arrow{width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-3px);transition:transform .35s var(--ease)}
.pgrid-more.is-expanded .pm-arrow{transform:rotate(-135deg) translateY(-1px)}
.pcard:hover,.pcard:focus-visible{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent;outline:none}
.pcard-media{aspect-ratio:4/3;overflow:hidden;background:#fff;
  display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}
.pcard-media img{width:100%;height:100%;object-fit:contain;padding:11%;
  transition:transform .6s var(--ease)}
.pcard:hover .pcard-media img{transform:scale(1.06)}
.pcard-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.pcard-body h3{font-size:16.5px}
.pcard-body p{font-size:13.5px;color:var(--tx-2);flex:1}
.ptag{font-family:var(--mono);font-size:10.5px;color:var(--blue);letter-spacing:.05em;
  line-height:1.5;word-break:break-word}
.prange{font-size:12.5px;color:var(--tx-2);font-weight:600;font-variant-numeric:tabular-nums}
.pspec{font-size:13px;font-weight:650;color:var(--accent);margin-top:6px;
  transition:transform .3s var(--ease)}
.pcard:hover .pspec{transform:translateX(5px)}
.prod-note{margin-top:52px;padding:22px 28px;border:1px dashed var(--line);border-radius:var(--r);
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
  color:var(--tx-2);font-size:14.5px}
.prod-note a{color:var(--accent);font-weight:650;white-space:nowrap}
.prod-note a:hover{text-decoration:underline}

/* ============ CAPABILITIES ============ */
.cap-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:stretch}
.cap-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-inv);
  border:1px solid var(--line-inv);border-radius:var(--r);overflow:hidden}
.cap{background:var(--navy-2);padding:30px 28px}
.cap-num{font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:.15em}
.cap h3{font-size:17px;margin:12px 0 8px}
.cap p{font-size:13.5px;color:var(--tx-inv-2)}
.cap-media{position:relative;border-radius:var(--r);overflow:hidden;min-height:340px;margin:0}
.cap-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.85)}
.cap-media figcaption{position:absolute;left:16px;bottom:16px;z-index:2;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--tx-inv);
  background:rgba(8,20,32,.72);backdrop-filter:blur(8px);padding:8px 14px;border-radius:999px;
  border:1px solid var(--line-inv)}

/* ============ INDUSTRIES ============ */
.ind-acc{border-top:1px solid var(--line)}
.ind-item{border-bottom:1px solid var(--line)}
.ind-head{display:grid;grid-template-columns:64px 1fr 40px;align-items:center;gap:18px;width:100%;
  padding:24px 6px;background:none;border:0;cursor:pointer;text-align:left;
  font:inherit;color:inherit;transition:background .25s,padding-left .3s var(--ease)}
.ind-head:hover{background:var(--paper-alt);padding-left:18px}
.ind-idx{font-family:var(--mono);font-size:12px;color:var(--tx-2)}
.ind-name{font-size:clamp(19px,2.4vw,26px);font-weight:650;letter-spacing:-.015em}
.ind-arrow{font-size:22px;color:var(--tx-2);transition:transform .3s var(--ease),color .3s;justify-self:end}
.ind-head:hover .ind-arrow{transform:translateX(6px);color:var(--accent)}
.ind-item.open .ind-arrow{transform:rotate(90deg);color:var(--accent)}
.ind-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s var(--ease)}
.ind-item.open .ind-panel{grid-template-rows:1fr}
.ind-inner{overflow:hidden;min-height:0}
.ind-media{height:min(300px,34vw);border-radius:14px;background-color:var(--paper-alt);
  background-size:cover;background-position:center 40%;position:relative;overflow:hidden;
  background-image:linear-gradient(120deg,#22344a 0%,#3b5570 55%,#7d97ad 100%)}
.ind-media::after{content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,0) 42%,rgba(255,255,255,.65) 78%,#fff 100%)}
.ind-body{max-width:860px;padding:20px 6px 34px}
.ind-pain{font-size:15px;line-height:1.75;color:var(--tx-2);margin:0 0 16px}
.ind-pain b{color:var(--tx);font-weight:650}
.ind-models{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.ind-models-t{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--tx-2);text-transform:uppercase}
.ind-chips{display:flex;gap:10px;flex-wrap:wrap}
.ind-chip{font-family:var(--mono);font-size:12.5px;color:var(--blue);background:var(--paper-alt);
  border:1px solid var(--line);border-radius:999px;padding:7px 16px;cursor:pointer;
  transition:border-color .25s,color .25s,transform .25s var(--ease)}
.ind-chip:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.ind-sum{font-size:15.5px;line-height:1.8;color:var(--tx);margin:0;
  padding-left:14px;border-left:2px solid var(--accent)}

/* ============ QUALITY ============ */
.quality-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.lead{color:var(--tx-2);font-size:16px;margin:20px 0 28px;max-width:480px}
.q-list{list-style:none;border-top:1px solid var(--line)}
.q-list li{display:flex;justify-content:space-between;gap:24px;padding:15px 4px;
  border-bottom:1px solid var(--line);font-size:14.5px}
.q-list strong{font-weight:650;white-space:nowrap}
.q-list span{color:var(--tx-2);font-family:var(--mono);font-size:13px;text-align:right}
.q-video{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3;background:var(--navy);margin:0}
.q-video video{width:100%;height:100%;object-fit:cover;filter:saturate(.9)}
.q-video figcaption{position:absolute;left:16px;bottom:16px;font-family:var(--mono);font-size:11px;
  letter-spacing:.12em;color:var(--tx-inv);background:rgba(8,20,32,.72);backdrop-filter:blur(8px);
  padding:8px 14px;border-radius:999px;border:1px solid var(--line-inv)}
.cert-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:70px}
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:18px 20px;
  transition:transform .3s var(--ease),box-shadow .3s}
.cert:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.cert-k{display:block;font-family:var(--mono);font-size:12.5px;font-weight:700;color:var(--blue);letter-spacing:.06em}
.cert-v{display:block;font-size:12.5px;color:var(--tx-2);margin-top:6px}
.cert-note{margin-top:18px;font-size:13px;color:var(--tx-2)}
/* quality section on dark background */
.section-dark .eyebrow{color:#7FA8C9}
#quality .lead{color:var(--tx-inv-2)}
#quality .q-list{border-top-color:var(--line-inv)}
#quality .q-list li{border-bottom-color:var(--line-inv)}
#quality .q-list strong{color:#fff}
#quality .q-list span{color:var(--tx-inv-2)}
#quality .cert{background:rgba(255,255,255,.055);border-color:var(--line-inv)}
#quality .cert:hover{box-shadow:0 20px 44px -20px rgba(0,0,0,.55)}
#quality .cert-k{color:#7FB2DC}
#quality .cert-v{color:var(--tx-inv-2)}
#quality .cert-note{color:var(--tx-inv-2)}

/* ============ CONTACT ============ */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:start}
.contact-quick{margin-top:20px;font-size:15.5px;font-weight:600;color:var(--tx-inv-2)}
.contact-quick a{color:var(--tx-inv);transition:color .25s}
.contact-quick a:hover{color:var(--accent-2)}
.cq-sep{margin:0 10px;color:var(--tx-inv-2)}
.contact-list{list-style:none;margin-top:8px}
.contact-list li{display:flex;align-items:baseline;gap:18px;padding:13px 0;border-bottom:1px solid var(--line-inv)}
.cl-k{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--tx-inv-2);flex:0 0 86px}
.contact-list a{color:var(--tx-inv);font-size:15.5px;font-weight:500}
.contact-list a:hover{color:var(--accent-2)}
.contact-note{margin-top:18px;font-size:13px;color:var(--tx-inv-2)}

.inquiry{display:grid;grid-template-columns:1fr 1fr;gap:18px;
  background:var(--navy-2);border:1px solid var(--line-inv);border-radius:var(--r);padding:32px}
.field{display:flex;flex-direction:column;gap:7px}
.field-wide{grid-column:1/-1}
.field label{font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--tx-inv-2)}
.field input,.field textarea{background:rgba(255,255,255,.05);border:1px solid var(--line-inv);
  border-radius:var(--r-sm);padding:12px 14px;color:#fff;font:inherit;font-size:14.5px;
  transition:border-color .25s,background .25s;width:100%}
.field input::placeholder,.field textarea::placeholder{color:rgba(157,178,194,.5)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue-2);background:rgba(255,255,255,.08)}
.form-foot{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.form-hint{font-size:12px;color:var(--tx-inv-2);max-width:340px}
.form-ok,.form-err{grid-column:1/-1;font-size:14px;padding:12px 16px;border-radius:var(--r-sm)}
.form-ok{background:rgba(14,159,110,.14);color:#5CE0AC;border:1px solid rgba(14,159,110,.4)}
.form-err{background:rgba(220,38,38,.14);color:#F59B9B;border:1px solid rgba(220,38,38,.4)}

/* file upload inside the inquiry form */
.upload-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.upload-btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer}
.upload-btn svg{flex:0 0 auto;opacity:.9}
.upload-hint{font-size:12px;color:var(--tx-inv-2);line-height:1.45}
.upload-list{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.upload-list li{position:relative;display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);
  border:1px solid var(--line-inv);border-radius:var(--r-sm);padding:6px 10px 6px 6px;font-size:12.5px;color:var(--tx-inv-2);max-width:240px}
.upload-list img{width:38px;height:38px;object-fit:cover;border-radius:4px;flex:0 0 auto}
.upload-list .file-ic{width:38px;height:38px;display:grid;place-items:center;border-radius:4px;background:rgba(255,255,255,.08);font-size:10px;letter-spacing:.06em}
.upload-list .file-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.upload-list .file-x{background:none;border:0;color:var(--tx-inv-2);cursor:pointer;font-size:15px;line-height:1;padding:0 2px}
.upload-list .file-x:hover{color:var(--accent-2)}
.up-progress{display:flex;align-items:center;gap:10px;margin-top:10px}
.up-bar{flex:1;height:4px;border-radius:999px;background:rgba(255,255,255,.14);overflow:hidden}
.up-bar span{display:block;height:100%;width:0;border-radius:999px;background:var(--accent);transition:width .2s ease}
.up-text{font-size:12px;color:var(--tx-inv-2);white-space:nowrap;min-width:74px;text-align:right}

/* ============ FOOTER ============ */
.site-footer{background:#060F19;color:var(--tx-inv-2)}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:44px;padding:70px 28px 50px}
/* tight-cropped logo sits flush with the text edge; info block fills the space to its right */
.footer-brand{display:flex;align-items:flex-start;gap:26px}
.footer-logo{width:112px;height:auto;flex:none;margin-top:2px}
.footer-brand-info{min-width:0}
.footer-brand .brand-text{display:block;margin-bottom:12px}
.footer-brand .brand-text em{letter-spacing:.06em;font-size:9.5px}
.footer-brand-info p{font-size:13.5px;line-height:1.65}
.footer-col h4{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
.footer-col a{display:block;font-size:13.5px;padding:4px 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.social-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.social-row a{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-inv);border-radius:50%;color:var(--tx-inv);
  transition:border-color .25s,color .25s,transform .25s,background .25s}
.social-row a:hover{border-color:var(--accent);color:#fff;background:rgba(232,99,26,.16);transform:translateY(-2px)}
.social-row svg{width:18px;height:18px;display:block}
/* optical size calibration — each brand glyph fills its canvas differently;
   sizes chosen so rendered glyph height ≈ 15px for all */
.social-row .ic-li{width:17px;height:17px}   /* LinkedIn: glyph 87.5% of canvas  */
.social-row .ic-fb{width:15px;height:15px}   /* Facebook: glyph fills full height */
.social-row .ic-wa{width:18px;height:18px}   /* WhatsApp: glyph ~83%              */
.social-row .ic-tg{width:20px;height:20px}   /* Telegram: diagonal plane ~65%     */
.social-row .ic-vk{width:25px;height:25px}   /* VK wordmark: short+wide lettering */
.social-row .ic-max{width:15px;height:15px}  /* MAX bubble: fills canvas          */
.social-row .ic-wc{width:22px;height:22px}   /* WeChat: twin bubbles ~69%         */
.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid var(--line-inv);padding-top:22px;padding-bottom:26px;font-size:12.5px}
.footer-mono{font-family:var(--mono);letter-spacing:.2em}

/* ============ SPEC MODAL ============ */
.modal{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:24px}
.modal[hidden]{display:none}
.modal-backdrop{position:absolute;inset:0;background:rgba(5,13,22,.72);backdrop-filter:blur(6px);
  animation:fadeIn .25s}
.modal-panel{position:relative;background:#fff;border-radius:18px;max-width:680px;width:100%;
  max-height:86vh;overflow:auto;padding:38px 40px;box-shadow:0 40px 90px -20px rgba(0,0,0,.5);
  animation:panelIn .4s var(--ease)}
@keyframes fadeIn{from{opacity:0}}
@keyframes panelIn{from{opacity:0;transform:translateY(26px) scale(.98)}}
.modal-x{position:absolute;top:14px;right:16px;width:38px;height:38px;border-radius:50%;
  border:1px solid var(--line);background:#fff;font-size:20px;color:var(--tx-2);cursor:pointer;
  transition:background .2s,color .2s,transform .2s}
.modal-x:hover{background:var(--navy);color:#fff;transform:rotate(90deg)}
.modal-panel h3{font-size:26px;margin:14px 0 10px}
.m-lead{color:var(--tx-2);font-size:14.5px}
.m-sub{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);
  font-family:var(--mono);margin:28px 0 12px}
.spec-table{width:100%;border-collapse:collapse;font-size:13.5px}
.spec-table tr{border-bottom:1px solid var(--line)}
.spec-table tr:last-child{border-bottom:0}
.spec-table th{text-align:left;font-weight:600;color:var(--tx-2);padding:9px 12px 9px 0;
  width:44%;vertical-align:top;font-size:13px}
.spec-table td{padding:9px 0;font-weight:600;font-variant-numeric:tabular-nums}
.cross-table th{width:30%}
.cross-table td{font-family:var(--mono);font-size:12.5px}
.dim-table{font-size:13px}
.dim-table tr{display:table-row}
.dim-table th{width:auto;text-align:center;padding:9px 10px;color:var(--tx-2)}
.dim-table td,.dim-table td.mono{text-align:center;font-variant-numeric:tabular-nums;padding:8px 10px}
.dim-table td.mono{font-family:var(--mono);font-weight:700;color:var(--blue)}
.m-lead{margin-bottom:18px}
.m-note{font-size:12.5px;color:var(--tx-2);margin:22px 0 18px}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media (max-width:1020px){
  .pgrid{grid-template-columns:repeat(2,1fr)}
  .cap-wrap{grid-template-columns:1fr}
  .cap-media{min-height:280px}
  .quality-grid,.contact-grid{grid-template-columns:1fr;gap:44px}
  .sec-head{grid-template-columns:1fr;gap:18px;align-items:start}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cert-row{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .wrap{padding:0 20px}
  .section{padding:72px 0}
  .pgrid{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats > div{padding:14px 16px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:56px 20px 40px}
  .inquiry{grid-template-columns:1fr;padding:22px}
  .nav{position:fixed;inset:0;background:rgba(6,15,25,.97);backdrop-filter:blur(16px);
    flex-direction:column;align-items:center;justify-content:center;gap:34px;
    opacity:0;pointer-events:none;transition:opacity .35s}
  .nav.is-open{opacity:1;pointer-events:auto}
  .nav a{font-size:24px}
  .burger{display:flex}
  .header-actions .btn{display:none}
  .hero-title{font-size:clamp(38px,11vw,54px)}
  .modal-panel{padding:28px 22px}
  .cert-row{grid-template-columns:1fr}
  .contact-list li{flex-wrap:wrap}
}

/* ============ ZH typography ============ */
html[data-lang="zh"] .hero-title{letter-spacing:.03em;line-height:1.18}
html[data-lang="zh"] .ind-name{letter-spacing:.02em}

/* screenshot/debug mode: ?shot=1 collapses full-viewport hero */
html[data-shot] .hero{min-height:0;height:820px}
html[data-shot] .hero-grid{padding-top:140px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .hero-copy > *{opacity:1;transform:none}
  .reveal{opacity:1;transform:none}
}

/* ============ PROCESS ============ */
.pr-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:0;counter-reset:pr}
.pr-step{position:relative;padding:6px 18px 10px;text-align:left}
.pr-step:not(:last-child)::after{content:'\2192';position:absolute;right:-8px;top:34px;
  font-family:var(--mono);font-size:16px;color:var(--tx-3);opacity:.6}
.pr-ic{width:56px;height:56px;color:var(--blue);display:block;margin-bottom:16px;
  transition:color .3s var(--ease),transform .3s var(--ease)}
.pr-step:hover .pr-ic{color:var(--accent);transform:translateY(-3px)}
.pr-step h3{font-size:15.5px;font-weight:650;margin:0 0 8px;letter-spacing:-.01em}
.pr-step p{font-size:13px;line-height:1.7;color:var(--tx-2);margin:0}
/* header stays on one line between burger and desktop widths */
@media (min-width:1081px) and (max-width:1340px){
  .header-inner{gap:18px}
  .nav{gap:15px}
  .nav a{font-size:13.5px}
  .header-actions{gap:10px}
  .header-actions .btn{padding:11px 18px;font-size:13.5px}
  .lang-btn{padding:5px 9px}
}

/* header stays on one line between burger and desktop widths */
@media (min-width:1081px) and (max-width:1340px){
  .header-inner{gap:18px}
  .nav{gap:15px}
  .nav a{font-size:13.5px}
  .header-actions{gap:10px}
  .header-actions .btn{padding:11px 18px;font-size:13.5px}
  .lang-btn{padding:5px 9px}
}

@media (max-width:1080px){
  .pr-grid{grid-template-columns:repeat(2,1fr);gap:26px 18px}
  .pr-step:not(:last-child)::after{content:''}
  .pr-step{padding:0}
}