:root {
  --ink: #1b2433;
  --ink-soft: #4a5566;
  --muted: #7a8494;
  --navy: #13213a;
  --navy-2: #1d3157;
  --accent: #b5622a;
  --accent-soft: #f3e4d7;
  --paper: #faf8f4;
  --card: #ffffff;
  --line: #e4ded4;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.95; letter-spacing: .02em; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy-2); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* ヘッダー */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(250,248,244,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; min-height: 64px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 36px; height: 36px; border-radius: 50%; }
.brand b { font-family: var(--serif); font-size: 19px; letter-spacing: .04em; }
.brand small { display: block; font-size: 11px; color: var(--muted); letter-spacing: .08em; line-height: 1.2; }
.nav { display: flex; flex-wrap: wrap; gap: 2px 4px; list-style: none; margin: 0; padding: 0; }
.nav a { display: block; padding: 6px 10px; font-size: 14px; font-weight: 700; color: var(--ink-soft); text-decoration: none; border-radius: 4px; }
.nav a:hover { color: var(--ink); background: var(--accent-soft); }
.nav a[aria-current="page"] { color: var(--accent); }
.nav .tel { background: var(--navy); color: #fff; }
.nav .tel:hover { background: var(--navy-2); color: #fff; }

/* トップ */
.hero { position: relative; color: #fff; background: var(--navy) url("img/hero.jpg") 70% center / cover no-repeat; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(19,33,58,.96) 0%, rgba(19,33,58,.85) 45%, rgba(19,33,58,.35) 100%); }
.hero .wrap { position: relative; padding-top: 88px; padding-bottom: 88px; }
.eyebrow { display: inline-block; font-size: 13px; letter-spacing: .14em; color: #f0c9a6; border: 1px solid rgba(240,201,166,.5); padding: 2px 12px; border-radius: 99px; margin-bottom: 20px; }
.hero h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(34px, 6vw, 60px); line-height: 1.35; margin: 0 0 16px; letter-spacing: .04em; }
.hero .sub { font-size: clamp(16px, 2vw, 19px); margin: 0 0 28px; color: #dfe5ee; max-width: 34em; }
.hero .question { font-family: var(--serif); font-size: clamp(20px, 2.6vw, 26px); margin: 0 0 32px; padding-left: 16px; border-left: 3px solid var(--accent); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; border-radius: 6px; font-weight: 700; text-decoration: none; font-size: 16px; line-height: 1.4; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #9c5222; }
.btn-ghost { border: 1px solid rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-2); }

/* 手紙 */
.letter { background: var(--card); max-width: 800px; margin: -40px auto 0; position: relative; border: 1px solid var(--line); border-radius: 4px; box-shadow: 0 10px 40px rgba(19,33,58,.08); padding: 56px 0 24px; }
.letter p { margin: 0 0 1.4em; font-size: 17px; }
.chapter { padding: 48px 0 8px; }
.chapter + .chapter { border-top: 1px solid var(--line); }
.chapter-no { font-family: var(--serif); color: var(--accent); font-size: 14px; letter-spacing: .2em; margin: 0 0 6px; }
.chapter h2 { font-family: var(--serif); font-size: clamp(24px, 3.4vw, 32px); line-height: 1.5; margin: 0 0 20px; letter-spacing: .03em; }
.kicker { font-family: var(--serif); font-size: clamp(20px, 2.6vw, 24px); line-height: 1.6; color: var(--navy-2); margin: 0 0 28px; padding: 16px 20px; background: var(--accent-soft); border-left: 4px solid var(--accent); }
.criteria { counter-reset: c; list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 10px; }
.criteria li { counter-increment: c; position: relative; padding: 14px 16px 14px 60px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; font-weight: 700; }
.criteria li::before { content: counter(c); position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 30px; height: 30px; border-radius: 50%; background: var(--navy); color: #fff; font-family: var(--serif); display: grid; place-items: center; font-size: 15px; }

.qa { margin: 8px 0 28px; display: grid; gap: 8px; }
.qa details { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; }
.qa summary { cursor: pointer; padding: 14px 44px 14px 16px; font-weight: 700; list-style: none; position: relative; line-height: 1.7; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; position: absolute; right: 16px; top: 12px; font-size: 20px; color: var(--accent); font-weight: 400; }
.qa details[open] summary::after { content: "−"; }
.qa details[open] summary { color: var(--navy-2); }
.qa .ans { padding: 0 16px 16px; margin: 0; font-size: 16px; color: var(--ink-soft); }
.qa-label { font-size: 13px; color: var(--muted); margin: 0 0 4px; letter-spacing: .06em; }

.gets { list-style: none; padding: 0; margin: 0 0 28px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.gets li { position: relative; padding: 12px 14px 12px 40px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; font-size: 15px; line-height: 1.7; }
.gets li::before { content: ""; position: absolute; left: 14px; top: 17px; width: 14px; height: 8px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

.ps { margin-top: 24px; padding: 28px 24px; background: var(--paper); border: 1px dashed #cfc5b6; border-radius: 4px; }
.ps h2 { font-size: 20px; margin-bottom: 12px; }
.ps .last { font-family: var(--serif); font-size: 20px; color: var(--navy-2); margin-bottom: 0; }

/* 電話の箱 */
.callbox { background: var(--navy); color: #fff; border-radius: 6px; padding: 32px 24px; text-align: center; margin: 8px 0 32px; }
.callbox .say { font-family: var(--serif); font-size: clamp(20px, 3vw, 26px); margin: 0 0 8px; }
.callbox .num { display: inline-block; font-size: clamp(30px, 5vw, 40px); font-weight: 700; letter-spacing: .06em; color: #fff; text-decoration: none; margin: 4px 0 8px; }
.callbox .note { font-size: 14px; color: #c9d2df; margin: 0; }
.callbox .addr { font-size: 14px; color: #c9d2df; margin: 12px 0 0; }

/* 見出しつきのページ */
.page-head { background: var(--navy); color: #fff; }
.page-head .wrap { padding-top: 56px; padding-bottom: 48px; }
.page-head h1 { font-family: var(--serif); font-size: clamp(28px, 4.4vw, 40px); margin: 0 0 8px; letter-spacing: .04em; }
.page-head p { margin: 0; color: #c9d2df; max-width: 46em; }
main section { padding: 56px 0; }
main section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-title { font-family: var(--serif); font-size: clamp(22px, 3vw, 28px); margin: 0 0 8px; }
.sec-lead { color: var(--ink-soft); margin: 0 0 28px; }

/* 取扱機種 */
.tier { margin-bottom: 48px; }
.tier-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; border-bottom: 2px solid var(--navy); padding-bottom: 8px; }
.tier-head .step { font-family: var(--serif); color: var(--accent); font-size: 14px; letter-spacing: .16em; }
.tier-head h2 { font-family: var(--serif); font-size: 24px; margin: 0; }
.tier-head p { margin: 0; color: var(--muted); font-size: 14px; flex-basis: 100%; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 20px; display: flex; flex-direction: column; }
.card .maker { font-size: 13px; color: var(--muted); letter-spacing: .06em; margin: 0; }
.card h3 { font-size: 18px; margin: 2px 0 12px; line-height: 1.5; }
.card dl { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 4px 8px; margin: 0 0 12px; font-size: 14px; line-height: 1.7; }
.card dt { color: var(--muted); }
.card dd { margin: 0; overflow-wrap: anywhere; }
.card .fit { font-size: 15px; background: var(--paper); border-left: 3px solid var(--accent); padding: 10px 12px; margin: 0 0 12px; }
.card .foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.card .price { font-weight: 700; color: var(--navy-2); }
.notice { font-size: 13px; color: var(--muted); }

/* 会社・ロボット */
.info { width: 100%; border-collapse: collapse; background: var(--card); }
.info th, .info td { border: 1px solid var(--line); padding: 12px 16px; text-align: left; vertical-align: top; }
.info th { background: var(--paper); width: 9em; font-weight: 700; }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 24px 0; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 20px; }
.feature h3 { font-family: var(--serif); font-size: 20px; margin: 0 0 8px; color: var(--navy-2); }
.feature p { margin: 0; font-size: 15px; }
.products { display: grid; gap: 24px; }
.products img { border: 1px solid var(--line); background: #fff; margin: 0 auto; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 24px; }
.panel h3 { font-family: var(--serif); margin: 0 0 8px; font-size: 20px; }
.contact-list { margin: 0; }
.contact-list dt { font-size: 13px; color: var(--muted); }
.contact-list dd { margin: 0 0 16px; font-size: 18px; overflow-wrap: anywhere; }

/* フッター */
.site-footer { background: var(--navy); color: #c9d2df; font-size: 14px; margin-top: 0; }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 24px; padding-top: 48px; padding-bottom: 32px; }
.site-footer h3 { color: #fff; font-family: var(--serif); font-size: 17px; margin: 0 0 12px; }
.site-footer a { color: #e3e8ef; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.copyright { text-align: center; font-size: 12px; padding: 16px; border-top: 1px solid rgba(255,255,255,.1); color: #9aa6b8; }

/* スマホの電話ボタン */
.float-call { display: none; }

@media (max-width: 760px) {
  .site-header { position: static; }
  .letter { margin-top: 0; border-left: 0; border-right: 0; border-radius: 0; box-shadow: none; padding-top: 32px; }
  .letter p { font-size: 16px; }
  .gets, .features, .two { grid-template-columns: minmax(0, 1fr); }
  .site-footer .wrap { grid-template-columns: minmax(0, 1fr); }
  .hero .wrap { padding-top: 56px; padding-bottom: 56px; }
  .hero::before { background: rgba(19,33,58,.82); }
  .info th { width: 6.5em; }
  .nav a { padding: 4px 8px; font-size: 13px; }
  .float-call { display: block; position: fixed; left: 16px; right: 16px; bottom: 12px; z-index: 30; text-align: center; background: var(--accent); color: #fff; padding: 12px; border-radius: 8px; font-weight: 700; text-decoration: none; box-shadow: 0 6px 20px rgba(0,0,0,.25); }
  body.has-float { padding-bottom: 72px; }
}

/* 申込みの箱のメールボタン */
.callbox .mail-btn { margin: 12px 0 10px; }