:root{
  --ink:#1c1a17;
  --ink-soft:#4a463f;
  --washi:#ffffff;
  --indigo:#0f7b89;      /* 実際のコーポレートブランドカラー（ティール） */
  --indigo-deep:#092529; /* 上記を暗くした背景用（濃色パネル・cream文字とのコントラスト13.7:1） */
  --teal-text:#074149;   /* バッジ等の小さい文字用（washi比7.1:1、AAA相当の余裕を確保） */
  --seal:#9c3b2e;
  --line:#c9bfa9;        /* 装飾目的の罫線・分割線用（コントラスト比を優先しない箇所） */
  --line-strong:#8a7752; /* フォーム枠線・ボタン枠線などUI部品用（washi比 3.5:1 / paper-card比 3.9:1、WCAG 1.4.11準拠） */
  --paper-card:#f7f3e9;
  --max:1120px;
  --focus:#083e46;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--washi);
  color:var(--ink);
  font-family:"Noto Sans JP",sans-serif;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.disp{
  font-family:"Shippori Mincho",serif;
  color:var(--ink);
  margin:0;
  letter-spacing:.02em;
}
a{color:inherit;}
img,svg{display:block;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px;}

/* 全ページ共通：フォーカスの可視化。アウトラインを消すだけの実装は禁止 */
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

/* ---------- 原稿用紙風グリッド（装飾のみ。情報を持たないためaria-hidden必須） ---------- */
.grid-texture{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity:.18;
  position:absolute;
  inset:0;
  pointer-events:none;
}

/* ---------- header（プロダクトページ用の簡易ヘッダー。企業サイトのヘッダーとは別） ---------- */
header.product-header{
  position:sticky; top:0; z-index:50;
  background:rgba(239,232,216,.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 28px;
  max-width:var(--max); margin:0 auto;
  gap:20px;
}
.brand{
  display:flex; align-items:baseline; gap:10px;
  font-family:"Shippori Mincho",serif;
  font-size:22px; font-weight:700;
  text-decoration:none;
}
.brand .en{
  font-family:"Noto Sans JP",sans-serif;
  font-size:11px; letter-spacing:.14em; color:var(--ink-soft); font-weight:500;
}
.back-to-corp{
  font-size:12px; color:var(--ink-soft); text-decoration:none; border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.back-to-corp:hover{color:var(--ink);}
.nav-links{display:flex; gap:28px; font-size:14px; flex:1; justify-content:center;}
.nav-links a{text-decoration:none; color:var(--ink-soft); padding-bottom:2px; border-bottom:1px solid transparent; transition:border-color .2s, color .2s;}
.nav-links a:hover{color:var(--ink); border-color:var(--seal);}
.btn-primary{
  background:var(--teal-text); color:#fdfaf2; border:1px solid var(--teal-text);
  padding:11px 22px; font-size:14px; font-weight:500;
  cursor:pointer; letter-spacing:.04em;
  transition:background .2s, transform .15s;
  text-decoration:none; display:inline-block;
}
.btn-primary:hover{background:var(--indigo-deep); transform:translateY(-1px);}
@media (max-width:820px){ .nav-links{display:none;} }

/* ---------- hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  padding:88px 0 96px;
  border-bottom:1px solid var(--line);
}
.hero-grid{
  position:relative; z-index:2;
  display:grid;
  grid-template-columns: 1.05fr 1fr;
  gap:56px;
  align-items:center;
}
@media (max-width:900px){ .hero-grid{grid-template-columns:1fr;} }

.eyebrow{
  font-size:12px; letter-spacing:.28em; color:var(--seal); font-weight:700;
  margin-bottom:18px; display:block;
}
.hero h1{
  font-size:46px;
  line-height:1.45;
  font-weight:700;
  text-wrap: pretty;
}
@media (max-width:900px){ .hero h1{font-size:38px;} }
@media (max-width:520px){ .hero h1{font-size:30px;} }
.hero h1 em{
  font-style:normal; color:var(--indigo);
  box-shadow: inset 0 -0.32em 0 rgba(31,53,82,.16);
}
.hero p.lead{
  margin-top:26px; font-size:16px; color:var(--ink-soft); max-width:44ch;
}
.hero-cta{margin-top:34px; display:flex; gap:16px; flex-wrap:wrap;}
.btn-ghost{
  border:1px solid var(--line-strong); background:transparent; color:var(--ink);
  padding:11px 22px; font-size:14px; cursor:pointer; text-decoration:none;
  transition:background .2s,color .2s;
}
.btn-ghost:hover{background:var(--ink); color:var(--washi); border-color:var(--ink);}

/* ---------- signature stage（アニメーション演出を載せる共通の箱） ---------- */
.demo-stage{
  position:relative;
  background:var(--paper-card);
  border:1px solid var(--line-strong);
  box-shadow: 6px 6px 0 rgba(28,26,23,.06);
  min-height:360px;
  overflow:hidden;
}
.demo-head{
  display:flex; justify-content:space-between; align-items:center;
  padding:14px 18px; border-bottom:1px solid var(--line);
  font-size:12px; letter-spacing:.08em; color:var(--ink-soft);
}
.demo-body{position:relative; height:300px;}

/* ---------- section shell ---------- */
section{padding:88px 0;}
.section-head{margin-bottom:52px;}
.section-head .eyebrow{margin-bottom:14px;}
.section-head h2{font-size:32px; font-weight:700; line-height:1.5; white-space:nowrap;}
@media (max-width:600px){ 
  .section-head h2{
    font-size:25px;
    white-space:normal;
    text-wrap:pretty;
  }
}
.section-head p{margin-top:16px; color:var(--ink-soft); font-size:15px; max-width:640px;}

.divider{border:none; border-top:1px solid var(--line); margin:0;}

/* ---------- pain points ---------- */
.pain-list{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
.pain-item{background:var(--washi); padding:30px 26px;}
.pain-item .num{font-family:"Shippori Mincho",serif; font-size:13px; color:var(--seal); letter-spacing:.1em;}
.pain-item p{margin:14px 0 0; font-size:14.5px; color:var(--ink-soft);}
@media (max-width:820px){ .pain-list{grid-template-columns:1fr;} }

/* ---------- features ---------- */
.feat-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
.feat-card{background:var(--paper-card); padding:32px 28px; min-height:190px; position:relative;}
.feat-card .icon{width:30px; height:30px; margin-bottom:18px; color:var(--indigo);}
.feat-card h3{font-family:"Noto Sans JP",sans-serif; font-size:16px; font-weight:700;}
.feat-card p{margin-top:10px; font-size:13.5px; color:var(--ink-soft);}
@media (max-width:900px){ .feat-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:600px){ .feat-grid{grid-template-columns:1fr;} }

/* ---------- security banner ---------- */
.security{background:var(--indigo-deep); color:#ffffff; position:relative; overflow:hidden;}
.security .grid-texture{opacity:.06; filter:invert(1);}
.security-inner{position:relative; z-index:2; display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center;}
@media (max-width:900px){ .security-inner{grid-template-columns:1fr;} }
.security h2{color:#ffffff; font-size:32px; white-space:nowrap;}
@media (max-width:600px){ .security h2{font-size:25px; white-space:normal; text-wrap:pretty;} }
.security p{color:#ffffff; font-size:15px; margin-top:18px; max-width:52ch;}
.flow{border:1px solid rgba(242,237,224,.35); padding:26px;}
.flow-row{display:flex; align-items:center; gap:14px; padding:10px 0; font-size:13.5px; border-bottom:1px dashed rgba(242,237,224,.25);}
.flow-row:last-child{border-bottom:none;}
.flow-row .tag{font-size:10.5px; letter-spacing:.08em; padding:3px 8px; border:1px solid currentColor;}
.tag.ok{color:#8fd0a8;}
.tag.no{color:#e39a8a; text-decoration:line-through; opacity:.9;}

/* ---------- spec table ---------- */
.spec-table{width:100%; border-collapse:collapse; font-size:14px;}
.spec-table th, .spec-table td{text-align:left; padding:16px 18px; border-bottom:1px solid var(--line); vertical-align:top;}
.spec-table th{width:220px; font-family:"Shippori Mincho",serif; font-weight:700; color:var(--ink-soft); font-size:13.5px; letter-spacing:.02em;}
.spec-table tr:first-child th, .spec-table tr:first-child td{border-top:1px solid var(--line);}

/* ---------- カスタマイズ可能要素（プレースホルダー入り） ---------- */
.customize-grid{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line);}
@media (max-width:820px){ .customize-grid{grid-template-columns:1fr;} }
.customize-card{background:var(--paper-card); padding:30px 28px; position:relative;}
.customize-card .badge{
  display:inline-block; font-size:11px; letter-spacing:.06em; font-weight:700;
  padding:3px 10px; border:1px solid var(--teal-text); color:var(--teal-text); margin-bottom:14px;
}
.customize-card .badge.optional{border-color:var(--seal); color:var(--seal);}
.customize-card h3{font-family:"Noto Sans JP",sans-serif; font-size:17px; font-weight:700;}
.customize-card p{margin-top:10px; font-size:14px; color:var(--ink-soft);}
.customize-card .ph-note{
  margin-top:16px; padding:10px 12px; font-size:12.5px; color:var(--ink-soft);
  border:1px dashed var(--line-strong); background:rgba(255,255,255,.5);
}
.customize-card .ph-note b{color:var(--seal);}

/* ---------- roadmap ---------- */
.roadmap-list{display:flex; flex-direction:column; border-top:1px solid var(--line);}
.roadmap-item{display:grid; grid-template-columns:180px 1fr; gap:20px; padding:20px 0; border-bottom:1px solid var(--line); align-items:baseline;}
.roadmap-item .status{font-size:12px; letter-spacing:.08em; color:var(--seal); font-weight:700;}
.roadmap-item p{margin:0; font-size:14.5px; color:var(--ink-soft);}
@media (max-width:600px){ .roadmap-item{grid-template-columns:1fr; gap:4px;} }

/* ---------- contact ---------- */
.contact{background:var(--paper-card); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.contact-grid{display:grid; grid-template-columns:1fr 1.2fr; gap:60px;}
@media (max-width:900px){ .contact-grid{grid-template-columns:1fr;} }
.contact-note{font-size:14px; color:var(--ink-soft); margin-top:18px;}
form{display:flex; flex-direction:column; gap:18px;}
.field{display:flex; flex-direction:column; gap:6px;}
.field label{font-size:12.5px; letter-spacing:.05em; color:var(--ink-soft);}
.field input, .field select, .field textarea{
  font:inherit; font-size:14.5px;
  padding:11px 12px; border:1px solid var(--line-strong); background:#fff;
  color:var(--ink);
}
.field textarea{resize:vertical; min-height:96px;}
.field-row{display:grid; grid-template-columns:1fr 1fr; gap:18px;}
@media (max-width:520px){ .field-row{grid-template-columns:1fr;} }
.submit-btn{
  background:var(--seal); color:#fdfaf2; border:1px solid var(--seal); padding:14px 26px;
  font-size:14.5px; letter-spacing:.04em; cursor:pointer; align-self:flex-start;
  transition:background .2s;
}
.submit-btn:hover{background:#7e2f24;}
.form-msg{font-size:13.5px; margin-top:4px; display:none;}
.form-msg.show{display:block;}
.form-msg.ok{color:#215c3f; font-weight:500;}

footer.product-footer{padding:44px 0; font-size:13px; color:var(--ink-soft);}
footer.product-footer .foot-row{display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;}
footer.product-footer a{text-decoration:underline; text-underline-offset:2px;}