/* =========================================================
   柴田製作所 提案デモ  --  shared stylesheet
   ========================================================= */
:root{
  --ink:#141a21;
  --steel:#1d2733;
  --steel-2:#27333f;
  --paper:#f5f6f7;
  --white:#ffffff;
  --line:#dde1e6;
  --muted:#5d6b7a;
  --accent:#e8590c;
  --accent-dark:#c74a08;
  --radius:10px;
  --shadow:0 10px 30px rgba(20,26,33,.10);
  --font-sans:'Noto Sans JP',"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  --font-en:'Oswald','Noto Sans JP',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--white);
  line-height:1.85;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(29,39,51,.96);
  backdrop-filter:blur(6px);
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  height:68px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:36px;height:36px;flex:0 0 auto;border-radius:8px;
  background:linear-gradient(135deg,var(--accent),#f08c00);
  display:grid;place-items:center;
  font-family:var(--font-en);font-weight:600;color:#fff;font-size:18px;
}
.brand-text{line-height:1.25}
.brand-text .name{font-weight:900;font-size:17px;letter-spacing:.04em}
.brand-text .tag{font-size:10.5px;color:#b9c3cd;letter-spacing:.08em}
.gnav ul{display:flex;gap:4px}
.gnav a{
  display:block;padding:8px 14px;border-radius:6px;
  font-size:14px;font-weight:500;letter-spacing:.04em;color:#dfe5ea;
  transition:.2s;
}
.gnav a:hover{background:rgba(255,255,255,.1);color:#fff}
.gnav a.current{color:#fff;box-shadow:inset 0 -2px 0 var(--accent)}
.gnav a.nav-cta{
  background:var(--accent);color:#fff;font-weight:700;margin-left:8px;
}
.gnav a.nav-cta:hover{background:var(--accent-dark)}
.nav-toggle{
  display:none;background:none;border:0;cursor:pointer;
  width:44px;height:44px;position:relative;
}
.nav-toggle span{
  position:absolute;left:10px;right:10px;height:2px;background:#fff;
  transition:.25s;
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:22px}
.nav-toggle span:nth-child(3){top:29px}
body.nav-open .nav-toggle span:nth-child(1){top:22px;transform:rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){top:22px;transform:rotate(-45deg)}

@media(max-width:900px){
  .nav-toggle{display:block}
  .gnav{
    position:fixed;inset:68px 0 auto 0;
    background:var(--steel);
    transform:translateY(-130%);transition:.3s;
    box-shadow:var(--shadow);
  }
  body.nav-open .gnav{transform:translateY(0)}
  .gnav ul{flex-direction:column;padding:12px 20px 20px;gap:2px}
  .gnav a{padding:13px 10px;font-size:15px}
  .gnav a.nav-cta{margin-left:0;text-align:center;margin-top:8px}
}

/* ---------- hero (top) ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:var(--steel);
}
.hero-bg{
  position:absolute;inset:0;
  background:url(img/hero.jpg) center/cover no-repeat;
  opacity:.5;
}
.hero-grad{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,26,33,.92) 20%,rgba(20,26,33,.55) 60%,rgba(232,89,12,.28));
}
.hero-inner{
  position:relative;max-width:1120px;margin:0 auto;
  padding:110px 24px 96px;
}
.hero .en-label{
  font-family:var(--font-en);letter-spacing:.3em;font-size:13px;
  color:var(--accent);text-transform:uppercase;font-weight:500;
}
.hero h1{
  font-size:clamp(28px,5vw,52px);font-weight:900;line-height:1.35;
  margin:18px 0 20px;letter-spacing:.03em;
}
.hero h1 .accent{color:#ffb37a}
.hero .lead{
  font-size:clamp(14px,1.8vw,17px);color:#d6dde3;max-width:620px;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.hero-badges span{
  border:1px solid rgba(255,255,255,.35);border-radius:999px;
  padding:7px 18px;font-size:13px;font-weight:500;background:rgba(20,26,33,.35);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

/* ---------- page hero (sub pages) ---------- */
.page-hero{
  position:relative;color:#fff;background:var(--steel);overflow:hidden;
}
.page-hero .ph-bg{
  position:absolute;inset:0;background-position:center;background-size:cover;opacity:.35;
}
.page-hero .ph-grad{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,26,33,.94) 30%,rgba(20,26,33,.6));
}
.page-hero .ph-inner{
  position:relative;max-width:1120px;margin:0 auto;padding:72px 24px 64px;
}
.page-hero .en-label{
  font-family:var(--font-en);letter-spacing:.3em;font-size:12px;
  color:var(--accent);text-transform:uppercase;
}
.page-hero h1{font-size:clamp(26px,4vw,40px);font-weight:900;margin-top:10px;letter-spacing:.04em}
.page-hero p.desc{margin-top:14px;color:#ccd4db;max-width:640px;font-size:15px}
.breadcrumb{
  position:relative;max-width:1120px;margin:0 auto;padding:14px 24px 0;
  font-size:12px;color:#9aa7b2;display:flex;gap:8px;flex-wrap:wrap;
}
.breadcrumb a{color:#c2ccd5;text-decoration:underline;text-underline-offset:3px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 34px;border-radius:6px;font-weight:700;font-size:15px;
  letter-spacing:.05em;transition:.2s;border:2px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{border-color:var(--steel);color:var(--steel)}
.btn-outline:hover{background:var(--steel);color:#fff}
.btn .arrow{font-family:var(--font-en);transition:transform .2s}
.btn:hover .arrow{transform:translateX(4px)}

/* ---------- sections ---------- */
section{padding:84px 0}
.section-head{margin-bottom:44px}
.section-head .en{
  font-family:var(--font-en);color:var(--accent);letter-spacing:.28em;
  font-size:12.5px;text-transform:uppercase;font-weight:500;
}
.section-head h2{
  font-size:clamp(23px,3.2vw,32px);font-weight:900;letter-spacing:.04em;margin-top:8px;
}
.section-head p.note{margin-top:12px;color:var(--muted);font-size:14.5px;max-width:640px}
.section-head.center{text-align:center}
.section-head.center p.note{margin-inline:auto}
.bg-paper{background:var(--paper)}
.bg-steel{background:var(--steel);color:#fff}
.bg-steel .section-head h2{color:#fff}
.bg-steel .section-head p.note{color:#b8c2cc}

/* ---------- top: problem strip ---------- */
.spec-strip{
  background:var(--ink);color:#fff;padding:0;
}
.spec-strip .wrap{
  display:grid;grid-template-columns:repeat(4,1fr);
}
.spec-strip .cell{
  padding:26px 18px;text-align:center;
  border-left:1px solid rgba(255,255,255,.08);
}
.spec-strip .cell:first-child{border-left:0}
.spec-strip .num{
  font-family:var(--font-en);font-size:30px;font-weight:600;color:#ffb37a;line-height:1.2;
}
.spec-strip .num small{font-size:14px;margin-left:2px}
.spec-strip .label{font-size:12.5px;color:#c2ccd5;margin-top:4px;letter-spacing:.05em}
@media(max-width:760px){
  .spec-strip .wrap{grid-template-columns:repeat(2,1fr)}
  .spec-strip .cell:nth-child(3){border-left:0}
  .spec-strip .cell{border-top:1px solid rgba(255,255,255,.08)}
  .spec-strip .cell:nth-child(-n+2){border-top:0}
}

/* ---------- cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media(max-width:900px){.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.25s;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:16/9;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:24px 26px 28px;flex:1;display:flex;flex-direction:column}
.card h3{font-size:18px;font-weight:700;letter-spacing:.03em}
.card h3 .en{
  display:block;font-family:var(--font-en);font-size:11px;color:var(--accent);
  letter-spacing:.25em;text-transform:uppercase;margin-bottom:6px;font-weight:500;
}
.card p{font-size:14px;color:var(--muted);margin-top:10px;flex:1}
.card .more{
  margin-top:16px;font-size:13.5px;font-weight:700;color:var(--accent);
  display:inline-flex;align-items:center;gap:6px;
}

/* ---------- feature list ---------- */
.feature{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.feature.rev{grid-template-columns:1fr 1.05fr}
.feature.rev .feature-img{order:2}
@media(max-width:900px){
  .feature,.feature.rev{grid-template-columns:1fr}
  .feature.rev .feature-img{order:0}
}
.feature-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.feature-body h3{font-size:22px;font-weight:900;letter-spacing:.03em;margin-bottom:14px}
.feature-body p{color:var(--muted);font-size:15px}
.checklist{margin-top:18px;display:grid;gap:10px}
.checklist li{
  position:relative;padding-left:30px;font-size:14.5px;font-weight:500;
}
.checklist li::before{
  content:"";position:absolute;left:0;top:7px;width:18px;height:18px;border-radius:50%;
  background:var(--accent);
  clip-path:none;
}
.checklist li::after{
  content:"";position:absolute;left:5px;top:12px;width:8px;height:4px;
  border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg);
}
.bg-steel .checklist li{color:#e7ecf0}

/* ---------- tables ---------- */
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
table.spec th,table.spec td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line)}
table.spec thead th{
  background:var(--steel);color:#fff;font-weight:700;font-size:13.5px;
  letter-spacing:.06em;white-space:nowrap;
}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:nth-child(even){background:#fafbfc}
table.spec td .en{font-family:var(--font-en);letter-spacing:.03em}
.spec-note{font-size:12.5px;color:var(--muted);margin-top:10px}

/* ---------- works ---------- */
.works-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media(max-width:820px){.works-grid{grid-template-columns:1fr}}
.work{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 28px;transition:.2s;
}
.work:hover{box-shadow:var(--shadow)}
.work .work-tag{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.08em;
  color:#fff;background:var(--steel);border-radius:4px;padding:3px 10px;
}
.work .work-tag.alt{background:var(--accent)}
.work h3{font-size:17px;font-weight:700;margin:12px 0 6px}
.work dl{
  display:grid;grid-template-columns:82px 1fr;gap:4px 14px;
  font-size:13.5px;margin-top:10px;
}
.work dt{color:var(--muted);font-weight:500;white-space:nowrap}
.work dd{font-weight:500}

/* ---------- flow ---------- */
.flow{counter-reset:step;display:grid;gap:0}
.flow li{
  counter-increment:step;position:relative;
  padding:22px 20px 22px 84px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;
}
.flow li::before{
  content:"0" counter(step);
  position:absolute;left:22px;top:50%;transform:translateY(-50%);
  font-family:var(--font-en);font-size:26px;font-weight:600;color:var(--accent);
}
.flow li h3{font-size:16.5px;font-weight:700}
.flow li p{font-size:13.5px;color:var(--muted);margin-top:4px}

/* ---------- company ---------- */
.msg-quote{
  border-left:4px solid var(--accent);padding:6px 0 6px 24px;margin:26px 0;
  font-size:15.5px;font-weight:500;line-height:2.1;
}
.history{border-left:2px solid var(--line);margin-left:8px;padding-left:34px;display:grid;gap:26px}
.history li{position:relative}
.history li::before{
  content:"";position:absolute;left:-42px;top:8px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--accent);
}
.history .year{
  font-family:var(--font-en);font-size:19px;font-weight:600;color:var(--accent);letter-spacing:.04em;
}
.history p{font-size:14.5px;margin-top:2px}

/* ---------- contact ---------- */
.contact-panel{
  display:grid;grid-template-columns:1fr 1fr;gap:28px;
}
@media(max-width:860px){.contact-panel{grid-template-columns:1fr}}
.contact-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 34px;text-align:center;
}
.contact-box .en{
  font-family:var(--font-en);font-size:11.5px;letter-spacing:.25em;color:var(--accent);
  text-transform:uppercase;
}
.contact-box h3{font-size:19px;font-weight:900;margin:6px 0 14px}
.contact-box .tel{
  font-family:var(--font-en);font-size:36px;font-weight:600;letter-spacing:.02em;color:var(--steel);
  line-height:1.2;
}
.contact-box .hours{font-size:13px;color:var(--muted);margin-top:8px}
.form{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px 38px;
}
.form .row{margin-bottom:22px}
.form label{
  display:block;font-size:14px;font-weight:700;margin-bottom:8px;
}
.form label .req{
  display:inline-block;background:var(--accent);color:#fff;font-size:10.5px;
  border-radius:4px;padding:1px 8px;margin-left:8px;vertical-align:2px;font-weight:700;
}
.form input,.form textarea,.form select{
  width:100%;padding:13px 14px;border:1px solid #c8cfd6;border-radius:6px;
  font:inherit;font-size:15px;background:#fafbfc;
}
.form input:focus,.form textarea:focus,.form select:focus{
  outline:2px solid var(--accent);outline-offset:1px;background:#fff;
}
.form .hint{font-size:12.5px;color:var(--muted);margin-top:6px}
@media(max-width:600px){.form{padding:28px 20px}}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;background:var(--steel);color:#fff;overflow:hidden;
}
.cta-band .cta-bg{
  position:absolute;inset:0;background:url(img/mesh.jpg) center/cover;opacity:.18;
}
.cta-band .inner{
  position:relative;max-width:900px;margin:0 auto;text-align:center;
  padding:76px 24px;
}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:900;letter-spacing:.04em}
.cta-band p{color:#c8d1d9;margin-top:14px;font-size:15px}
.cta-band .hero-cta{justify-content:center}
.cta-band .tel-inline{
  font-family:var(--font-en);font-size:30px;font-weight:600;color:#fff;letter-spacing:.02em;
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#aeb9c3;font-size:13.5px}
.footer-inner{
  max-width:1120px;margin:0 auto;padding:56px 24px 28px;
  display:grid;grid-template-columns:1.2fr 1fr;gap:36px;
}
@media(max-width:760px){.footer-inner{grid-template-columns:1fr}}
.footer-brand .name{color:#fff;font-weight:900;font-size:17px;letter-spacing:.05em}
.footer-brand p{margin-top:12px;line-height:2}
.footer-nav{display:flex;gap:40px;flex-wrap:wrap}
.footer-nav ul{display:grid;gap:8px}
.footer-nav a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  max-width:1120px;margin:0 auto;padding:18px 24px 26px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:11.5px;color:#7b8894;
}
.demo-note{
  background:#fff3cd;color:#7a5a00;text-align:center;
  font-size:12px;padding:8px 16px;letter-spacing:.03em;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}