/* Layout: corporate multi-page site. Full-bleed deep-navy hero with animated fiber light trails,
   then alternating paper / white bands. Section heads pair a large English word with the Japanese title. */
:root{
  --paper:#f4f5f3;
  --surface:#ffffff;
  --ink:#121b24;
  --sub:#5a646e;
  --rule:#dde0de;
  --navy:#0b1a2a;
  --navy-2:#13283d;
  --on-navy:#e8eef3;
  --on-navy-sub:#9fb0bf;
  --accent:#0a7f86;
  --accent-soft:#e3f0ef;
  --spark:#e0a33a;
  --mincho:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  --gothic:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;
  --latin:"Jost","Zen Kaku Gothic New",system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0f151b;--surface:#151e27;--ink:#e8edf1;--sub:#9ba7b2;--rule:#26323d;
  --navy:#08121d;--navy-2:#0f2132;--accent:#41bcc1;--accent-soft:#12302f;--spark:#e8b45a;color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0f151b;--surface:#151e27;--ink:#e8edf1;--sub:#9ba7b2;--rule:#26323d;
  --navy:#08121d;--navy-2:#0f2132;--accent:#41bcc1;--accent-soft:#12302f;--spark:#e8b45a;color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--gothic);font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--spark);outline-offset:3px}
img,svg{max-width:100%}
h1,h2,h3{margin:0;text-wrap:balance}
p{margin:0}
.wrap{max-width:1160px;margin:0 auto;padding-inline:24px}
@media (max-width:600px){.wrap{padding-inline:18px}}
.num{font-family:var(--latin);font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.hd{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:76px;flex-wrap:wrap;padding-block:8px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.mark{width:34px;height:34px;flex:none}
.brand .t{display:flex;flex-direction:column;line-height:1.15}
.brand b{font-family:var(--latin);font-weight:600;letter-spacing:.2em;font-size:17px}
.brand small{font-size:11px;color:var(--sub);letter-spacing:.1em}
.nav{display:flex;align-items:center;gap:4px 28px;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:700;display:flex;flex-direction:column;align-items:center;line-height:1.3}
.nav a span{font-family:var(--latin);font-size:10px;letter-spacing:.16em;color:var(--sub);font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{color:var(--accent)}
.nav .cta{background:var(--accent);color:#fff;padding:10px 20px;border-radius:2px;flex-direction:row;gap:8px}
.nav .cta:hover{color:#fff;filter:brightness(1.08)}
@media (max-width:820px){.nav{gap:4px 16px}.nav a span{display:none}.nav a{font-size:13px}.nav .cta{padding:8px 14px}}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy);color:var(--on-navy);overflow:hidden;isolation:isolate}
.hero canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-1}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,var(--navy) 0%,color-mix(in srgb,var(--navy) 70%,transparent) 45%,transparent 80%)}
.hero .wrap{padding-block:120px 110px;display:grid;gap:28px}
@media (max-width:700px){.hero .wrap{padding-block:72px 64px}}
.hero .eyebrow{font-family:var(--latin);letter-spacing:.3em;font-size:12px;color:var(--spark);text-transform:uppercase}
.hero h1{font-family:var(--mincho);font-weight:600;font-size:clamp(36px,6vw,72px);line-height:1.3;letter-spacing:.04em}
.hero .lead{max-width:34em;color:var(--on-navy-sub);font-size:clamp(15px,1.7vw,17px)}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.btn{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:15px;padding:14px 28px;border-radius:2px;border:1px solid transparent;cursor:pointer;font-family:var(--gothic)}
.btn::after{content:"";width:18px;height:1px;background:currentColor;transition:width .2s}
.btn:hover::after{width:26px}
.btn.primary{background:var(--accent);color:#fff}
.btn.light{border-color:color-mix(in srgb,var(--on-navy) 50%,transparent);color:var(--on-navy)}
.btn.outline{border-color:var(--accent);color:var(--accent)}
.hero .scroll{position:absolute;right:24px;bottom:28px;font-family:var(--latin);font-size:10px;letter-spacing:.3em;color:var(--on-navy-sub);writing-mode:vertical-rl}
@media (max-width:700px){.hero .scroll{display:none}}

/* ---------- sections ---------- */
.sec{padding-block:110px}
.sec.white{background:var(--surface)}
@media (max-width:700px){.sec{padding-block:72px}}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px 32px;flex-wrap:wrap;margin-bottom:48px}
.head .en{display:block;font-family:var(--latin);font-weight:500;font-size:clamp(40px,6vw,76px);letter-spacing:.06em;line-height:1;color:var(--ink);text-transform:uppercase}
.head .en::first-letter{color:var(--accent)}
.head h2{font-size:15px;font-weight:700;margin-top:14px;display:flex;align-items:center;gap:10px}
.head h2::before{content:"";width:24px;height:2px;background:var(--accent)}
.head p{max-width:30em;color:var(--sub);font-size:15px}
.more{font-weight:700;font-size:14px;text-decoration:none;display:inline-flex;gap:10px;align-items:center}
.more::after{content:"→"}

/* news */
.news{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.news li{display:grid;grid-template-columns:120px 110px minmax(0,1fr);gap:8px 24px;padding:22px 4px;border-bottom:1px solid var(--rule);align-items:baseline}
.news time{font-family:var(--latin);color:var(--sub);font-size:14px;letter-spacing:.06em}
.news .cat{font-size:11px;border:1px solid var(--accent);color:var(--accent);text-align:center;padding:1px 0;border-radius:2px;letter-spacing:.1em}
@media (max-width:600px){.news li{grid-template-columns:auto auto;}.news li p{grid-column:1/-1}}

/* vision band */
.vision{background:var(--navy-2);color:var(--on-navy);position:relative;overflow:hidden}
.vision .wrap{padding-block:110px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px 72px;align-items:center}
@media (max-width:860px){.vision .wrap{grid-template-columns:1fr;padding-block:72px}}
.vision .en{font-family:var(--latin);letter-spacing:.3em;font-size:12px;color:var(--spark)}
.vision h2{font-family:var(--mincho);font-weight:600;font-size:clamp(26px,3.3vw,40px);line-height:1.55;margin-top:18px}
.vision h2 span{display:inline-block}
.vision p{color:var(--on-navy-sub)}
.vision p+p{margin-top:16px}
.vision .more{color:var(--on-navy);margin-top:28px}

/* business cards */
.bizgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,330px),1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.biz{background:var(--surface);padding:36px 32px;display:grid;gap:14px;align-content:start;text-decoration:none;color:var(--ink);position:relative;transition:background .2s}
.biz:hover{background:var(--accent-soft)}
.biz .ico{width:44px;height:44px;color:var(--accent)}
.biz .ico *{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.biz .en{font-family:var(--latin);font-size:11px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase}
.biz h3{font-size:19px;line-height:1.5}
.biz p{color:var(--sub);font-size:14px}
.biz .go{font-size:13px;font-weight:700;color:var(--accent)}
.biz.wide{background:var(--navy);color:var(--on-navy)}
.biz.wide p{color:var(--on-navy-sub)}
.biz.wide:hover{background:var(--navy-2)}
.biz.wide .go,.biz.wide .en{color:var(--spark)}

/* strengths */
.strengths{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:40px}
.st{border-top:2px solid var(--ink);padding-top:24px;display:grid;gap:12px;align-content:start}
.st .k{font-family:var(--latin);font-size:13px;letter-spacing:.2em;color:var(--accent)}
.st h3{font-size:20px;line-height:1.55}
.st p{color:var(--sub);font-size:15px}

/* company snippet */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:40px 72px;align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}
dl.co{display:grid;grid-template-columns:minmax(100px,170px) minmax(0,1fr);margin:0;border-top:1px solid var(--ink)}
dl.co dt,dl.co dd{margin:0;padding:18px 6px;border-bottom:1px solid var(--rule);font-size:15px;min-width:0}
dl.co dt{font-weight:700}
dl.co dd ul{margin:0;padding-left:1.2em}
@media (max-width:560px){dl.co{grid-template-columns:1fr}dl.co dt{border-bottom:none;padding-bottom:0;color:var(--sub);font-size:13px}}

/* contact band */
.cband{background:var(--accent);color:#fff}
.cband .wrap{padding-block:80px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center}
@media (max-width:760px){.cband .wrap{grid-template-columns:1fr;padding-block:56px}}
.cband .en{text-transform:uppercase;font-family:var(--latin);font-size:clamp(36px,5vw,60px);letter-spacing:.06em;line-height:1;font-weight:500}
.cband p{margin-top:14px;opacity:.9}
.cband .tel{display:flex;flex-direction:column;gap:4px}
.cband .tel b{font-family:var(--latin);font-size:clamp(26px,3.4vw,36px);letter-spacing:.04em;font-weight:500}
.cband .tel small{opacity:.85}
.cband .btn{background:#fff;color:var(--accent);margin-top:14px;justify-self:start}

/* ---------- sub pages ---------- */
.phero{background:var(--navy);color:var(--on-navy);position:relative;overflow:hidden}
.phero .wrap{padding-block:88px 72px}
.phero .en{font-family:var(--latin);font-size:clamp(40px,6vw,72px);letter-spacing:.06em;line-height:1;font-weight:500;text-transform:uppercase}
.phero h1{font-size:16px;margin-top:16px;font-weight:700;display:flex;gap:10px;align-items:center}
.phero h1::before{content:"";width:24px;height:2px;background:var(--spark)}
.phero svg{position:absolute;right:-60px;top:50%;transform:translateY(-50%);width:520px;opacity:.22;pointer-events:none}
.phero svg *{fill:none;stroke:var(--on-navy);stroke-width:1}
.crumb{font-size:12px;color:var(--sub);padding-block:14px;border-bottom:1px solid var(--rule);background:var(--surface)}
.crumb a{color:var(--sub);text-decoration:none}
.crumb a:hover{color:var(--accent)}
.crumb span{margin-inline:8px}

.bizrow{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:24px 64px;padding-block:56px;border-top:1px solid var(--rule);scroll-margin-top:90px}
.bizrow:last-child{border-bottom:1px solid var(--rule)}
@media (max-width:860px){.bizrow{grid-template-columns:1fr;padding-block:40px}}
.bizrow .ico{width:52px;height:52px;color:var(--accent)}
.bizrow .ico *{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.bizrow .en{display:block;font-family:var(--latin);font-size:12px;letter-spacing:.2em;color:var(--accent);margin-top:16px;text-transform:uppercase}
.bizrow h2{font-size:clamp(21px,2.4vw,26px);line-height:1.5;margin-top:6px}
.bizrow .txt>*+*{margin-top:18px}
.bizrow .txt p{color:var(--sub)}
.bizrow ul.pts{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:10px}
.bizrow ul.pts li{background:var(--surface);border:1px solid var(--rule);padding:12px 16px;font-size:14px;font-weight:700;display:flex;gap:10px;align-items:center}
.bizrow ul.pts li::before{content:"";width:6px;height:6px;background:var(--accent);flex:none}

.mvv{display:grid;gap:0;border-top:1px solid var(--ink)}
.mvv>div{display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:12px 48px;padding:40px 0;border-bottom:1px solid var(--rule)}
@media (max-width:760px){.mvv>div{grid-template-columns:1fr;padding:28px 0}}
.mvv .k{font-family:var(--latin);font-size:28px;letter-spacing:.08em;font-weight:500}
.mvv .k small{display:block;font-family:var(--gothic);font-size:13px;color:var(--sub);letter-spacing:.04em;font-weight:700}
.mvv h3{font-family:var(--mincho);font-size:clamp(20px,2.4vw,26px);line-height:1.6;font-weight:600}
.mvv p{color:var(--sub);margin-top:10px}
.vals{list-style:none;padding:0;margin:0;display:grid;gap:18px}
.vals li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 16px}
.vals b{font-family:var(--mincho);font-size:20px;grid-row:span 2}
.vals b::before{content:"";display:inline-block;width:8px;height:8px;background:var(--accent);margin-right:12px;vertical-align:middle}
.vals span{color:var(--sub);font-size:15px}

.access{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:center;background:var(--surface);border:1px solid var(--rule);padding:32px}
@media (max-width:760px){.access{grid-template-columns:1fr}}
.access .mapart{aspect-ratio:16/10;max-width:100%;background:var(--paper);border:1px solid var(--rule);position:relative;overflow:hidden}
.access .mapart svg{width:100%;height:100%;display:block}
.access .mapart .road{stroke:var(--rule);stroke-width:10;fill:none}
.access .mapart .road2{stroke:var(--rule);stroke-width:4;fill:none}
.access .mapart .rail{stroke:var(--sub);stroke-width:2;stroke-dasharray:8 6;fill:none;opacity:.6}
.access .mapart .pin{fill:var(--accent)}
.access .mapart text{font-size:12px;fill:var(--sub);font-family:var(--gothic)}

/* contact page */
.cgrid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:40px;align-items:start}
@media (max-width:900px){.cgrid{grid-template-columns:1fr}}
form.f{display:grid;gap:22px;background:var(--surface);border:1px solid var(--rule);padding:36px}
@media (max-width:600px){form.f{padding:22px}}
.field{display:grid;gap:8px}
.field label{font-weight:700;font-size:14px;display:flex;align-items:center;gap:8px}
.req{font-size:11px;background:var(--accent);color:#fff;padding:1px 8px;border-radius:2px;font-weight:700}
.opt{font-size:11px;background:var(--rule);color:var(--sub);padding:1px 8px;border-radius:2px}
.field input,.field select,.field textarea{font:inherit;font-size:16px;padding:12px 14px;border:1px solid var(--rule);border-radius:2px;background:var(--paper);color:var(--ink);width:100%}
.field textarea{min-height:170px;resize:vertical}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.check input{margin-top:6px}
.formmsg{padding:14px 16px;background:var(--accent-soft);font-size:15px;border-left:3px solid var(--accent)}
.side{display:grid;gap:16px}
.side .box{background:var(--navy);color:var(--on-navy);padding:28px;display:grid;gap:6px}
.side .box .k{font-size:13px;color:var(--on-navy-sub);font-weight:700}
.side .box b{font-family:var(--latin);font-size:26px;font-weight:500;letter-spacing:.04em;word-break:break-all;user-select:all}
.side .box small{color:var(--on-navy-sub)}

/* doc */
.doc{max-width:860px;margin:0 auto;padding:64px 24px 100px}
.doc h2{font-size:21px;margin:48px 0 12px;padding-bottom:10px;border-bottom:1px solid var(--rule);position:relative}
.doc h2::after{content:"";position:absolute;left:0;bottom:-1px;width:64px;height:2px;background:var(--accent)}
.doc h3{font-size:16px;margin:26px 0 6px}
.doc p,.doc li{font-size:15px}
.doc p+p{margin-top:10px}
.doc ol,.doc ul{padding-left:1.4em;margin:8px 0}
.doc .date{margin-top:44px;text-align:right;color:var(--sub);font-size:14px}
.doc dl.kv{display:grid;grid-template-columns:minmax(100px,170px) minmax(0,1fr);margin:0;border-top:1px solid var(--ink)}
.doc dl.kv dt,.doc dl.kv dd{margin:0;padding:12px 6px;border-bottom:1px solid var(--rule);font-size:15px;min-width:0}
.doc dl.kv dt{font-weight:700}
@media (max-width:560px){.doc dl.kv{grid-template-columns:1fr}.doc dl.kv dt{border-bottom:none;padding-bottom:0}}

/* ---------- footer ---------- */
.ft{background:var(--navy);color:var(--on-navy-sub);font-size:14px}
.ft .wrap{padding-block:72px 32px;display:grid;gap:48px}
.ft .top{display:grid;grid-template-columns:minmax(0,1.3fr) repeat(3,minmax(0,1fr));gap:32px}
@media (max-width:860px){.ft .top{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ft .top{grid-template-columns:1fr}}
.ft .brand{color:var(--on-navy)}
.ft .brand small{color:var(--on-navy-sub)}
.ft address{font-style:normal;margin-top:18px;line-height:1.8}
.ft h4{margin:0 0 12px;color:var(--on-navy);font-family:var(--latin);letter-spacing:.18em;font-size:12px;font-weight:500}
.ft ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ft a{color:var(--on-navy-sub);text-decoration:none}
.ft a:hover{color:var(--on-navy)}
.ft .bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid color-mix(in srgb,var(--on-navy) 15%,transparent);padding-top:24px;font-size:12px}
.totop{font-family:var(--latin);letter-spacing:.2em}

/* gentle entrance; content visible at rest */
@keyframes rise{from{transform:translateY(10px)}to{transform:none}}
.hero h1,.hero .lead,.hero .actions{animation:rise .8s ease-out both}
.hero .lead{animation-delay:.12s}.hero .actions{animation-delay:.22s}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}