/* =========================================================
   ケイワイ電子工業 v2 — 白基調ハイエンド
   コンセプト: 余白 / 明朝ディスプレイ / 極細罫線 / 紺×真鍮
   ========================================================= */
:root{
  --ink:#1a2230;
  --ink2:#3c4657;
  --muted:#6b7482;
  --faint:#9aa3af;
  --line:#e7e9ed;
  --line2:#d8dce2;
  --bg:#ffffff;
  --bg2:#f7f8f9;
  --navy:#0e2a47;
  --navy2:#1f5fa5;
  --brass:#a8874f;
  --brass2:#cfb27a;
  --sans:"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic Medium","Yu Gothic",Meiryo,system-ui,sans-serif;
  --serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP","MS PMincho",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:2;font-size:15.5px;-webkit-font-smoothing:antialiased}
a{color:var(--navy2);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
.wrap.narrow{max-width:880px}

/* ---- preview bar ---- */
.pvbar{background:#faf6ee;color:#8a6d3b;font-size:12px;text-align:center;padding:6px 12px;border-bottom:1px solid #eee3cc;letter-spacing:.06em}

/* ---- header ---- */
header.site{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
header.site.scrolled{box-shadow:0 4px 24px rgba(14,42,71,.07)}
.nav{display:flex;align-items:center;gap:20px;max-width:1160px;margin:0 auto;padding:16px 28px}
.logo{color:var(--ink);white-space:nowrap;line-height:1.3}
.logo b{font-family:var(--serif);font-size:20px;font-weight:600;letter-spacing:.08em;display:block}
.logo small{font-size:10px;color:var(--brass);letter-spacing:.34em;font-weight:600}
.nav nav{margin-left:auto;display:flex;gap:26px;flex-wrap:wrap}
.nav nav a{color:var(--ink2);font-size:13px;letter-spacing:.12em;position:relative;padding:4px 0}
.nav nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--brass);transition:right .3s}
.nav nav a:hover::after,.nav nav a.on::after{right:0}
.nav nav a.on{color:var(--navy)}
.nav .cta{border:1px solid var(--navy);color:var(--navy);padding:9px 20px;font-size:12.5px;letter-spacing:.14em;transition:.3s;white-space:nowrap}
.nav .cta:hover{background:var(--navy);color:#fff}
.navtoggle{display:none;margin-left:auto;width:46px;height:42px;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0;background:#fff;border:1px solid var(--line);border-radius:2px;cursor:pointer}
.navtoggle span{display:block;width:22px;height:2px;background:var(--navy);transition:transform .3s,opacity .3s}
.nav.open .navtoggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.open .navtoggle span:nth-child(2){opacity:0}
.nav.open .navtoggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:760px){
  .nav{flex-wrap:wrap;gap:10px 14px;position:relative}
  .navtoggle{display:flex}
  .nav nav{order:3;flex-basis:100%;margin-left:0;flex-direction:column;gap:0;max-height:0;overflow:hidden;transition:max-height .35s ease}
  .nav.open nav{max-height:75vh;overflow-y:auto}
  .nav nav a{padding:13px 2px;font-size:15px;letter-spacing:.08em;border-bottom:1px solid var(--line)}
  .nav nav a::after{display:none}
  .nav .cta{display:none}
  .nav.open .cta{display:block;order:4;flex-basis:100%;text-align:center;margin-top:2px}
}

/* ---- hero (top) ---- */
.hero{position:relative;overflow:hidden;padding:110px 0 90px;background:
  radial-gradient(1200px 500px at 85% -10%, #f3f6fa 0%, rgba(255,255,255,0) 60%),
  var(--bg)}
.hero .grid-bg{position:absolute;inset:0;pointer-events:none;width:100%;height:100%}

/* ---- 回路トレース・アニメーション（白背景版・グリーン発光） ---- */
.trace{fill:none;stroke:#d9e2ec;stroke-width:1.6}
.trace2{fill:none;stroke:#ecf0f5;stroke-width:1.2}
.pulse{fill:none;stroke:#12c48f;stroke-width:2.4;stroke-linecap:round;stroke-dasharray:34 460;opacity:.85;animation:dash 3.2s linear infinite;filter:drop-shadow(0 0 3px rgba(18,196,143,.9)) drop-shadow(0 0 9px rgba(18,196,143,.45))}
.pulse.lite{stroke:#5fe0b8;stroke-width:2;opacity:.6;filter:drop-shadow(0 0 4px rgba(95,224,184,.7))}
@keyframes dash{to{stroke-dashoffset:-494}}
.pad{fill:#f3f6fa;stroke:#dde5ee;stroke-width:1}
.node{fill:#fff;stroke:#c8d4e0;stroke-width:1.6}
.node.lit{fill:#12c48f;stroke:#12c48f}
@keyframes blink{0%,100%{fill:#e2e9f1;stroke:#c8d4e0;filter:none}50%{fill:#12c48f;stroke:#12c48f;filter:drop-shadow(0 0 5px rgba(18,196,143,.9))}}
.blink{animation:blink 2.4s ease-in-out infinite}
/* ランダムに走る閃光（点灯時間の異なる素数系の周期でランダム感を出す） */
@keyframes spark{0%,86%,100%{opacity:0}90%{opacity:1}94%{opacity:.2}}
.spark{fill:#12c48f;opacity:0;animation:spark 4.7s linear infinite;filter:drop-shadow(0 0 6px rgba(18,196,143,1)) drop-shadow(0 0 14px rgba(18,196,143,.5))}
@media (prefers-reduced-motion: reduce){.pulse,.blink,.spark{animation:none}}
.hero .inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center;max-width:1160px;margin:0 auto;padding:0 28px}
@media(max-width:960px){.hero{padding:70px 0 60px}.hero .inner{grid-template-columns:1fr;gap:44px}}
.hero .en{font-size:11px;letter-spacing:.42em;color:var(--brass);font-weight:600;margin-bottom:22px}
.hero h1{font-family:var(--serif);font-weight:600;font-size:46px;line-height:1.62;letter-spacing:.06em;margin:0 0 26px;color:var(--ink)}
.hero h1 em{font-style:normal;color:var(--navy);border-bottom:1px solid var(--brass)}
.hero p.lead{color:var(--muted);font-size:15px;max-width:34em;margin:0 0 36px}
@media(max-width:640px){.hero h1{font-size:31px}}

/* buttons */
.btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-f{display:inline-block;background:var(--navy);color:#fff;padding:15px 34px;font-size:13.5px;letter-spacing:.14em;transition:.3s;border:1px solid var(--navy)}
.btn-f:hover{background:#173c63}
.btn-o{display:inline-block;border:1px solid var(--line2);color:var(--ink);padding:15px 34px;font-size:13.5px;letter-spacing:.14em;transition:.3s;background:#fff}
.btn-o:hover{border-color:var(--navy);color:var(--navy)}
.btn-t{display:inline-block;color:var(--navy);font-size:13.5px;letter-spacing:.12em;border-bottom:1px solid var(--brass);padding-bottom:3px}
.btn-t:hover{color:var(--brass)}

/* hero animation card */
.heroanim{border:1px solid var(--line);background:#fff;box-shadow:0 30px 60px -30px rgba(14,42,71,.25)}
.heroanim .screen{aspect-ratio:16/10;background:#fff}
.heroanim iframe{width:100%;height:100%;border:0;display:block}
.halabel{display:flex;align-items:center;gap:10px;padding:12px 18px;font-size:11.5px;letter-spacing:.14em;color:var(--muted);border-top:1px solid var(--line)}
.halabel .dot{width:7px;height:7px;border-radius:50%;background:var(--brass);animation:blink 1.6s infinite}
@keyframes blink{50%{opacity:.25}}

/* ---- section base ---- */
section{padding:96px 0}
section.alt{background:var(--bg2)}
.sec-h{display:flex;align-items:center;gap:18px;margin-bottom:14px}
.sec-h .en{font-size:11px;letter-spacing:.4em;color:var(--brass);font-weight:600;white-space:nowrap}
.sec-h .ln{height:1px;background:var(--line2);flex:1;max-width:80px}
h2.title{font-family:var(--serif);font-weight:600;font-size:32px;letter-spacing:.08em;line-height:1.6;margin:0 0 22px}
@media(max-width:640px){h2.title{font-size:24px}section{padding:64px 0}}
p.sub{color:var(--muted);max-width:44em;margin:0 0 44px}
h3{font-family:var(--serif);font-weight:600;font-size:19px;letter-spacing:.06em;margin:0 0 12px}

/* ---- stats ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media(max-width:820px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{padding:38px 20px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
@media(max-width:820px){.stat:nth-child(2){border-right:0}.stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}}
.stat .num{font-family:var(--serif);font-size:40px;color:var(--navy);line-height:1.2}
.stat .num small{font-size:16px;color:var(--brass);margin-left:2px}
.stat .lbl{font-size:12px;letter-spacing:.18em;color:var(--muted);margin-top:8px}

/* ---- differentiation panels ---- */
.diff{display:grid;grid-template-columns:1fr 1fr;gap:28px}
@media(max-width:900px){.diff{grid-template-columns:1fr}}
.dpanel{position:relative;background:#fff;border:1px solid var(--line);padding:46px 42px 42px;transition:.35s;overflow:hidden}
.dpanel::before{content:"";position:absolute;top:0;left:0;width:52px;height:2px;background:var(--brass);transition:width .4s}
.dpanel:hover{box-shadow:0 24px 50px -24px rgba(14,42,71,.22);transform:translateY(-3px)}
.dpanel:hover::before{width:110px}
.dpanel .no{font-family:var(--serif);font-size:13px;color:var(--brass);letter-spacing:.3em;margin-bottom:16px}
.dpanel h3{font-size:24px;margin-bottom:16px}
.dpanel p{color:var(--muted);font-size:14px;margin:0 0 20px}
.dpanel ul{margin:0 0 26px;padding:0;list-style:none}
.dpanel li{font-size:13.5px;color:var(--ink2);padding:9px 0 9px 22px;border-bottom:1px solid var(--line);position:relative}
.dpanel li::before{content:"—";position:absolute;left:0;color:var(--brass)}
.dpanel .ph{margin:0 -42px;margin-top:26px}
.dpanel .ph img{width:100%;height:190px;object-fit:cover;filter:saturate(.92)}

/* ---- cards (strengths) ---- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:820px){.cards{grid-template-columns:1fr}}
.card{background:#fff;padding:40px 34px}
.card .ic{color:var(--navy);margin-bottom:20px}
.card h3{font-size:17px}
.card p{color:var(--muted);font-size:13.5px;margin:0}

/* ---- process strip ---- */
.flow{display:flex;flex-wrap:wrap;gap:0;align-items:stretch;border:1px solid var(--line);background:#fff}
.flow span{flex:1;min-width:110px;text-align:center;padding:20px 8px;font-size:13px;letter-spacing:.08em;color:var(--ink2);border-right:1px solid var(--line);position:relative}
.flow span:last-child{border-right:0}
.flow span i{display:block;font-style:normal;font-family:var(--serif);font-size:11px;color:var(--brass);letter-spacing:.2em;margin-bottom:4px}
.flow span.hl{background:var(--navy);color:#fff}
.flow span.hl i{color:#cfb27a}

/* ---- two-column ---- */
.two{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
@media(max-width:900px){.two{grid-template-columns:1fr;gap:40px}}

/* ---- table ---- */
table.spec{width:100%;border-collapse:collapse;font-size:14px}
table.spec th{white-space:nowrap;text-align:left;font-weight:600;color:var(--muted);letter-spacing:.1em;padding:15px 22px 15px 2px;border-bottom:1px solid var(--line);width:8.5em;vertical-align:top;font-size:12.5px}
table.spec td{padding:15px 0;border-bottom:1px solid var(--line);color:var(--ink2)}

/* ---- inspection gate ---- */
.gates{counter-reset:g;display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.gate{background:#fff;display:grid;grid-template-columns:120px 1fr 360px;gap:0;align-items:stretch}
@media(max-width:960px){.gate{grid-template-columns:1fr}}
.gate .gno{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;border-right:1px solid var(--line);padding:26px 10px}
@media(max-width:960px){.gate .gno{flex-direction:row;border-right:0;border-bottom:1px solid var(--line);justify-content:flex-start;padding:14px 22px}}
.gate .gno .g-en{font-size:10px;letter-spacing:.3em;color:var(--brass)}
.gate .gno .g-n{font-family:var(--serif);font-size:30px;color:var(--navy);line-height:1}
.gate .gbody{padding:32px 36px}
.gate .gbody h3{margin-bottom:8px}
.gate .gbody .eq{display:inline-block;font-size:11.5px;letter-spacing:.12em;color:var(--navy);border:1px solid var(--line2);padding:3px 12px;margin:0 6px 10px 0;background:var(--bg2)}
.gate .gbody p{color:var(--muted);font-size:13.5px;margin:8px 0 0}
.gate .gmedia{border-left:1px solid var(--line);background:#fff;position:relative;aspect-ratio:680/400;min-height:200px;align-self:center;width:100%;overflow:hidden}
@media(max-width:960px){.gate .gmedia{border-left:0;border-top:1px solid var(--line)}}
.gate .gmedia iframe{position:absolute;left:0;top:0;border:0}
.gate .gmedia img,.gate .gmedia video{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover}

/* ---- equipment grid ---- */
.eqgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media(max-width:900px){.eqgrid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.eqgrid{grid-template-columns:1fr}}
.eq-c{background:#fff;border:1px solid var(--line)}
.eq-c img{width:100%;height:180px;object-fit:cover;filter:saturate(.92)}
.eq-c .tx{padding:20px 22px 24px}
.eq-c .tx b{font-size:14.5px;letter-spacing:.04em;display:block;margin-bottom:4px}
.eq-c .tx span{font-size:12.5px;color:var(--muted);display:block;line-height:1.8}

/* ---- dark CTA ---- */
.cta-dark{background:linear-gradient(rgba(14,42,71,.55),rgba(14,42,71,.78)),url("img/ai-cta-dark.png") center/cover no-repeat var(--navy);color:#fff;padding:90px 0;position:relative;overflow:hidden}
.cta-dark .en{font-size:11px;letter-spacing:.42em;color:#cfb27a;margin-bottom:18px}
.cta-dark h2{font-family:var(--serif);font-weight:600;font-size:30px;letter-spacing:.08em;margin:0 0 16px}
.cta-dark p{color:#b9c6d6;font-size:14px;max-width:40em;margin:0 0 34px}
.cta-dark .btn-f{background:#fff;color:var(--navy);border-color:#fff}
.cta-dark .btn-f:hover{background:#e9eef4}
.cta-dark .btn-o{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.cta-dark .btn-o:hover{border-color:#fff;color:#fff}
.cta-dark .tr{position:absolute;right:-40px;top:-40px;opacity:.14;pointer-events:none}

/* ---- page hero (sub pages) ---- */
.page-hero{padding:86px 0 64px;border-bottom:1px solid var(--line);position:relative;overflow:hidden;background:
  radial-gradient(900px 340px at 90% -20%, #f2f5f9 0%, rgba(255,255,255,0) 60%), var(--bg)}
.page-hero>.wrap{position:relative;z-index:2}
.page-hero .circuit-bg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:1}
.page-hero .en{font-size:11px;letter-spacing:.42em;color:var(--brass);font-weight:600;margin-bottom:18px}
.page-hero h1{font-family:var(--serif);font-weight:600;font-size:40px;letter-spacing:.1em;margin:0 0 18px;line-height:1.5}
@media(max-width:640px){.page-hero h1{font-size:28px}}
.page-hero p{color:var(--muted);margin:0;max-width:40em}
.crumb{font-size:11.5px;color:var(--faint);letter-spacing:.1em;margin-top:26px}
.crumb a{color:var(--muted)}

/* ---- news ---- */
ul.news{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
ul.news li{display:flex;gap:26px;padding:20px 4px;border-bottom:1px solid var(--line);font-size:14px;align-items:baseline}
ul.news time{font-family:var(--serif);color:var(--brass);font-size:13px;letter-spacing:.08em;white-space:nowrap}
ul.news .tag{font-size:10.5px;letter-spacing:.14em;border:1px solid var(--line2);color:var(--muted);padding:2px 10px;margin-right:12px;white-space:nowrap}
@media(max-width:640px){ul.news li{flex-direction:column;gap:6px}}

/* ---- media frame ---- */
.frame{border:1px solid var(--line);background:#fff;box-shadow:0 24px 50px -30px rgba(14,42,71,.2)}
.frame .screen{aspect-ratio:16/10;background:#fff;position:relative}
.frame iframe,.frame video{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover}
.frame .cap{padding:12px 18px;font-size:11.5px;letter-spacing:.14em;color:var(--muted);border-top:1px solid var(--line)}

/* ---- footer ---- */
footer.site{border-top:1px solid var(--line);padding:70px 0 40px;background:var(--bg2)}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr;gap:40px}
@media(max-width:760px){footer .cols{grid-template-columns:1fr}}
footer .fl b{font-family:var(--serif);font-size:18px;letter-spacing:.1em;font-weight:600;display:block;margin-bottom:6px}
footer .fl .en{font-size:10px;letter-spacing:.32em;color:var(--brass);margin-bottom:20px}
footer .badges{display:flex;gap:14px;flex-wrap:wrap;margin:18px 0 22px}
footer .badges span{font-size:11.5px;letter-spacing:.08em;color:var(--ink2);border:1px solid var(--line2);background:#fff;padding:7px 16px;display:inline-flex;align-items:center;gap:8px}
footer .badges img{height:20px;width:auto}
footer nav{display:flex;gap:22px;flex-wrap:wrap;margin-bottom:22px}
footer nav a{color:var(--muted);font-size:12.5px;letter-spacing:.1em}
footer nav a:hover{color:var(--navy)}
footer small{display:block;color:var(--faint);font-size:12px;letter-spacing:.06em;line-height:2}
footer .copy{margin-top:34px;padding-top:22px;border-top:1px solid var(--line);color:var(--faint);font-size:11px;letter-spacing:.12em;text-align:center}

/* ---- reveal ---- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.12s}.rv.d2{transition-delay:.24s}.rv.d3{transition-delay:.36s}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}