/* ===== F1 fullsite — shared CSS =====
   F1デザイン（縦スパイン＋たわむ格子背景）下層ページ＋共通UI
============================================ */

:root{
  --bg: #faf7f0;
  --bg-soft: #f3efe5;
  --ink: #101820;
  --ink-2: #2b333b;
  --ink-3: #5a5f66;
  --accent: #0e4f5a;
  --gold: #b9a66b;
  --line: rgba(16,24,32,.10);
  --line-soft: rgba(120,110,90,.22);
  --muted-text: rgba(120,110,90,.7);
  --maxw: 1100px;
  --maxread: 760px;
}

*{box-sizing:border-box}
html,body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:system-ui,-apple-system,'Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;
  -webkit-font-smoothing:antialiased;
  text-size-adjust:100%;-webkit-text-size-adjust:100%;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}

/* ===== Background stage (sub pages) ===== */
.bg-stage{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-stage canvas, .bg-stage svg{
  position:absolute;inset:0;width:100%;height:100%;display:block;
}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;
  background:rgba(250,247,240,.82);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid rgba(16,24,32,.06);
}
.site-header .brand{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;font-size:15px;letter-spacing:.04em;color:var(--ink);
}
.site-header .brand .en{
  display:inline-block;font-size:10.5px;letter-spacing:.22em;
  color:var(--accent);margin-right:8px;font-family:system-ui,sans-serif;
}
.site-header .nav{
  display:flex;gap:22px;align-items:center;font-size:13px;
}
.site-header .nav a{
  display:inline-block;padding:6px 2px;
  border-bottom:1px solid transparent;transition:border-color .2s;
}
.site-header .nav a:hover{border-bottom-color:var(--ink)}
.site-header .nav .has-sub{position:relative}
.site-header .nav .has-sub > .toggle{
  background:none;border:none;cursor:pointer;color:inherit;
  padding:6px 2px;border-bottom:1px solid transparent;font-size:13px;
}
.site-header .nav .has-sub > .toggle:hover{border-bottom-color:var(--ink)}
.site-header .nav .sub{
  position:absolute;top:calc(100% + 6px);left:50%;transform:translateX(-50%);
  background:rgba(250,247,240,.98);border:1px solid rgba(16,24,32,.08);
  padding:8px 6px;min-width:220px;display:none;
  box-shadow:0 8px 30px rgba(16,24,32,.08);
}
.site-header .nav .has-sub:hover .sub,
.site-header .nav .has-sub:focus-within .sub{display:block}
.site-header .nav .sub a{
  display:block;padding:9px 12px;border:none;font-size:13px;line-height:1.5;
}
.site-header .nav .sub a:hover{color:var(--accent);background:rgba(14,79,90,.05)}
.site-header .ham{
  display:none;width:34px;height:34px;
  align-items:center;justify-content:center;
  border:1px solid rgba(16,24,32,.18);background:transparent;cursor:pointer;
}
.site-header .ham svg{width:18px;height:18px}

@media(max-width:820px){
  .site-header{padding:12px 16px}
  .site-header .nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(250,247,240,.99);
    padding:8px 0 14px;border-bottom:1px solid rgba(16,24,32,.06);
  }
  .site-header.open .nav{display:flex}
  .site-header .nav > a, .site-header .nav .has-sub > .toggle{
    padding:12px 20px;border-bottom:1px solid rgba(16,24,32,.05);
    border-radius:0;text-align:left;width:100%;
  }
  .site-header .nav .has-sub{position:static}
  .site-header .nav .sub{
    position:static;transform:none;display:block;
    border:none;padding:0 0 6px;background:transparent;
    box-shadow:none;min-width:0;
  }
  .site-header .nav .sub a{padding:10px 36px;font-size:13px}
  .site-header .ham{display:inline-flex}
}

/* ===== Page body container ===== */
.subpage{
  position:relative;z-index:1;padding-top:62px;
}

/* ===== Hero (sub pages) ===== */
.hero{
  position:relative;
  padding:88px 28px 56px;
  max-width:var(--maxw);margin:0 auto;
}
.hero .eyebrow{
  font-size:11px;letter-spacing:.24em;color:var(--accent);
  margin:0 0 18px;font-weight:600;
}
.hero h1{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;font-size:34px;line-height:1.5;letter-spacing:.02em;
  margin:0 0 26px;color:var(--ink);
  max-width:880px;
}
.hero .lead{
  font-size:15.5px;line-height:2.05;color:var(--ink-2);
  max-width:var(--maxread);margin:0;
}

/* ===== Section ===== */
.section{
  position:relative;
  padding:48px 28px;max-width:var(--maxw);margin:0 auto;
}
.section + .section{padding-top:24px}
.section .index-mark{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-size:54px;font-weight:700;color:rgba(120,110,90,.22);
  line-height:.85;margin:0 0 4px;
}
.section .eyebrow{
  font-size:10.5px;letter-spacing:.24em;color:var(--accent);
  margin:0 0 14px;font-weight:600;
}
.section h2{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;font-size:22px;line-height:1.55;
  margin:0 0 22px;padding-bottom:14px;
  border-bottom:1px solid var(--line-soft);
  letter-spacing:.02em;
}
.section h3{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;font-size:16px;margin:24px 0 10px;color:var(--ink);
  letter-spacing:.02em;
}
.section p{
  font-size:15px;line-height:2.05;color:var(--ink-2);
  max-width:var(--maxread);margin:0 0 18px;
}
.section p b, .section li b{color:var(--ink);font-weight:700}
.section ul.bullets{padding-left:1.2em;margin:0 0 18px;max-width:var(--maxread)}
.section ul.bullets li{font-size:15px;line-height:2;color:var(--ink-2);margin:0 0 6px}

/* ===== Cards (品質 / 対応領域) ===== */
.cards{
  display:grid;gap:16px;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  margin:0 0 24px;
}
.cards .card{
  background:rgba(255,255,255,.62);
  border:1px solid var(--line-soft);
  padding:22px 22px 24px;
}
.cards .card h3{margin:0 0 10px;font-size:15.5px}
.cards .card p{margin:0;font-size:14px;line-height:1.95}

/* ===== Steps list ===== */
.steps{
  counter-reset:step;list-style:none;padding:0;margin:0 0 24px;
  max-width:820px;
}
.steps li{
  counter-increment:step;position:relative;
  padding:20px 0 20px 60px;
  border-bottom:1px dashed var(--line-soft);
  font-size:15px;line-height:1.95;color:var(--ink-2);
}
.steps li:last-child{border-bottom:none}
.steps li::before{
  content:counter(step);
  position:absolute;left:0;top:20px;
  width:38px;height:38px;border-radius:50%;
  background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;font-size:14px;
}
.steps li b{
  display:inline-block;font-weight:700;color:var(--ink);
  margin-right:6px;
}

/* ===== Note callout (リスクも正直に) ===== */
.note{
  border-left:3px solid var(--gold);
  padding:16px 20px;margin:24px 0;
  background:rgba(255,255,255,.5);
  max-width:820px;
}
.note p{margin:0 0 10px;font-size:14.5px;line-height:1.95}
.note p:last-child{margin:0}

/* ===== CTA block ===== */
.cta-block{
  position:relative;
  padding:48px 32px 52px;max-width:var(--maxw);margin:56px auto 0;
  background:#fff;border:1px solid var(--line-soft);
}
.cta-block h2{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-size:22px;margin:0 0 14px;border:none;padding:0;
}
.cta-block p{
  font-size:14.5px;line-height:1.95;color:var(--ink-2);
  margin:0 0 22px;max-width:680px;
}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;background:var(--ink);color:#fff;
  font-size:14px;letter-spacing:.05em;border:1px solid var(--ink);
  transition:background .2s,color .2s;cursor:pointer;
}
.btn:hover{background:transparent;color:var(--ink)}
.btn.outline{background:transparent;color:var(--ink)}
.btn.outline:hover{background:var(--ink);color:#fff}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn.gold:hover{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn .arrow{display:inline-block;transform:translateX(0);transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}

/* ===== Definition list look (種別案内) ===== */
.dl-block{margin:0 0 28px;max-width:var(--maxread)}
.dl-block .item{padding:14px 0;border-bottom:1px solid var(--line-soft)}
.dl-block .item:first-child{padding-top:0}
.dl-block .item .label{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-weight:700;color:var(--ink);font-size:15px;margin:0 0 6px;
}
.dl-block .item p{margin:0;font-size:14.5px;line-height:1.95}

/* ===== Table (会社概要) ===== */
table.info{
  width:100%;max-width:820px;border-collapse:collapse;
  font-size:14.5px;background:rgba(255,255,255,.4);
}
table.info th, table.info td{
  text-align:left;padding:14px 14px;
  border-bottom:1px solid var(--line-soft);
  vertical-align:top;
}
table.info th{
  width:200px;font-weight:700;color:var(--ink);
  background:rgba(255,255,255,.55);
}
table.info td{color:var(--ink-2);line-height:1.85}
table.info td .placeholder{
  display:inline-block;padding:2px 8px;
  background:rgba(185,166,107,.18);color:#7a6a36;
  font-size:12px;border-radius:2px;
}

@media(max-width:560px){
  table.info, table.info tbody, table.info tr, table.info th, table.info td{display:block;width:100%}
  table.info th{border-bottom:none;padding:14px 14px 4px;background:transparent}
  table.info td{padding:0 14px 14px}
}

/* ===== Form ===== */
.form{max-width:720px;margin:0 0 24px}
.form .field{margin:0 0 18px}
.form label{
  display:block;font-size:13.5px;letter-spacing:.04em;
  color:var(--ink);margin:0 0 8px;font-weight:600;
}
.form label .req{color:#c0432e;margin-left:4px;font-weight:700}
.form input, .form select, .form textarea{
  width:100%;padding:12px 14px;
  background:#fff;border:1px solid rgba(16,24,32,.18);
  font:inherit;font-size:14.5px;color:var(--ink);
  border-radius:0;
}
.form textarea{min-height:140px;resize:vertical;line-height:1.7}
.form input:focus, .form select:focus, .form textarea:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 2px rgba(14,79,90,.10);
}
.form .row-checkbox{
  display:flex;gap:10px;align-items:flex-start;
  font-size:13.5px;color:var(--ink-2);line-height:1.7;
}
.form .row-checkbox input{width:auto;margin-top:4px}
.form .note-inline{font-size:12px;color:var(--muted-text);margin:6px 0 0}
.form .submit-row{margin-top:18px;display:flex;gap:14px;align-items:center}
.form .form-msg{
  display:none;margin:12px 0 0;padding:12px 14px;
  background:rgba(14,79,90,.08);border-left:3px solid var(--accent);
  font-size:13px;color:var(--ink);
}
.form.sent .form-msg{display:block}

/* ===== Policy ===== */
.policy h2{
  font-size:18px;border-bottom:1px solid var(--line-soft);
  padding-bottom:10px;margin-top:36px;
}
.policy h2:first-of-type{margin-top:24px}
.policy p, .policy ul.bullets{max-width:820px}
.policy .placeholder-block{
  display:block;margin:10px 0;padding:10px 14px;
  background:rgba(185,166,107,.14);color:#7a6a36;
  font-size:13px;border-left:3px solid var(--gold);
}

/* ===== Footer ===== */
.site-footer{
  position:relative;z-index:2;
  margin-top:80px;padding:48px 28px 24px;
  background:#101820;color:#e9e6df;
  font-size:13px;line-height:1.85;
}
.site-footer .inner{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;
}
.site-footer .brand{
  font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-size:17px;letter-spacing:.04em;color:#fff;margin:0 0 14px;
  font-weight:700;
}
.site-footer .nap{font-size:12.5px;line-height:1.95;color:#c8c5be}
.site-footer h4{
  margin:0 0 12px;font-family:'Hiragino Mincho ProN','Yu Mincho',serif;
  font-size:13.5px;color:#fff;letter-spacing:.06em;font-weight:700;
}
.site-footer ul{margin:0;padding:0;list-style:none}
.site-footer ul li{margin:0 0 7px}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .copy{
  border-top:1px solid rgba(255,255,255,.10);
  margin-top:32px;padding-top:18px;text-align:center;
  font-size:11.5px;color:#9e9b95;letter-spacing:.06em;
}
@media(max-width:760px){
  .site-footer .inner{grid-template-columns:1fr;gap:28px}
}

/* ===== Responsive ===== */
@media(max-width:600px){
  .hero{padding:72px 18px 36px}
  .hero h1{font-size:25px;line-height:1.55}
  .hero .lead{font-size:14.5px;line-height:2}
  .section{padding:36px 18px}
  .section h2{font-size:19px}
  .section p, .section ul.bullets li{font-size:14.5px;line-height:2}
  .cta-block{padding:32px 20px 36px;margin-top:40px}
  .cta-block h2{font-size:19px}
  .steps li{padding:18px 0 18px 54px;font-size:14.5px}
  .steps li::before{width:34px;height:34px;top:18px}
}

/* ===== Reduced motion guard ===== */
@media(prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  .bg-stage canvas{opacity:.9}
}