/* 探偵事務所四季彩 共通スタイル
   夜の藍色を基調に、四季の4色（春・夏・秋・冬）を細い帯で添える */
:root {
  --ink: #232634; --ink-soft: #5a5d6b; --paper: #fbfaf7; --card: #ffffff;
  --night: #1d2540; --night-2: #28325a; --on-night: #f4f1ea; --on-night-soft: #c9cbd8;
  --accent: #c8a46a; --line: #e4e1d8; --mist: #f1efe8;
  --spring: #e9a6b4; --summer: #6fae8c; --autumn: #d9884a; --winter: #7d9cc9;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-print-color-adjust: exact; print-color-adjust: exact; scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.9; -webkit-text-size-adjust: 100%; }
h1, h2, h3, h4 { font-family: var(--serif); margin: 0; line-height: 1.5; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: #fff; padding: 8px 12px; z-index: 20; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.seasons { display: flex; width: 64px; height: 4px; }
.seasons i { flex: 1; display: block; }
.seasons i:nth-child(1) { background: var(--spring); } .seasons i:nth-child(2) { background: var(--summer); }
.seasons i:nth-child(3) { background: var(--autumn); } .seasons i:nth-child(4) { background: var(--winter); }

.btn { display: inline-flex; flex-direction: column; justify-content: center; align-items: center; text-decoration: none; border-radius: 6px; padding: 12px 26px; font-weight: 700; line-height: 1.35; border: 0; cursor: pointer; font-family: inherit; font-size: 16px; }
.btn-gold { background: var(--accent); color: #1d2540; }
.btn-gold:hover { filter: brightness(1.06); }
.btn-ghost { border: 1.5px solid var(--on-night-soft); color: var(--on-night); }
.btn-line { border: 1.5px solid var(--night-2); color: var(--night-2); background: transparent; }
.btn small { font-size: 11px; font-weight: 500; }

/* ヘッダー */
.hd { background: var(--night); color: var(--on-night); position: sticky; top: 0; z-index: 10; }
.hd .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; flex-wrap: wrap; }
.brand { display: grid; line-height: 1.3; text-decoration: none; }
.brand b { font-family: var(--serif); font-size: 21px; letter-spacing: .08em; }
.brand span { font-size: 11px; color: var(--on-night-soft); letter-spacing: .06em; }
.nav { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; font-size: 14px; }
.nav a { text-decoration: none; color: var(--on-night-soft); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--on-night); }
.nav .btn { padding: 8px 16px; font-size: 13px; color: #1d2540; }

/* トップ：写真のヒーロー（写真はUnsplash、商用利用可） */
.hero { position: relative; color: var(--on-night); background: var(--night) url("/assets/hero.jpg") center / cover no-repeat; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(20,25,46,.94) 0%, rgba(20,25,46,.78) 50%, rgba(20,25,46,.45) 100%); }
.hero .wrap { position: relative; padding-block: 72px 80px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.hero .eyebrow { font-size: 13px; color: var(--accent); letter-spacing: .12em; margin-bottom: 16px; }
.hero h1 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; margin-bottom: 18px; }
.nb { display: inline-block; }
.hero p.lead { color: var(--on-night-soft); margin-bottom: 28px; max-width: 30em; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.tel-note { margin-top: 14px; font-size: 13.5px; color: var(--on-night-soft); max-width: 34em; }
.promise { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 10px; padding: 24px; display: grid; gap: 14px; }
.promise h2 { font-size: 17px; color: var(--on-night); }
.promise ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.promise li { display: grid; grid-template-columns: 22px 1fr; gap: 10px; font-size: 14.5px; color: var(--on-night-soft); }
.promise li::before { content: ""; width: 10px; height: 10px; margin-top: 9px; border-radius: 50%; background: var(--accent); }
.promise li b { color: var(--on-night); }

/* 下層ページの見出し */
.page-head { background: var(--night); color: var(--on-night); }
.page-head .wrap { padding-block: 52px; display: grid; gap: 10px; }
.crumb { font-size: 12px; color: var(--on-night-soft); }
.crumb a { text-decoration: none; }
.page-head h1 { font-size: clamp(26px, 3.6vw, 34px); }
.page-head p.lead { color: var(--on-night-soft); max-width: 40em; }

.license { background: var(--mist); border-bottom: 1px solid var(--line); font-size: 13.5px; color: var(--ink-soft); }
.license .wrap { display: flex; gap: 8px 28px; flex-wrap: wrap; padding-block: 12px; }
.license b { color: var(--ink); }

.sec { padding-block: 80px; }
.alt { background: var(--mist); }
.head { display: grid; gap: 10px; margin-bottom: 40px; }
.head h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; }
.head p { color: var(--ink-soft); max-width: 40em; }
.prose { max-width: 46em; display: grid; gap: 16px; }
.prose h3 { font-size: 19px; margin-top: 12px; }
.prose ul { margin: 0; padding-left: 1.3em; }

/* サービス */
.svc { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.svc article { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 30px; display: grid; gap: 14px; align-content: start; min-width: 0; }
.svc .tag { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.svc h3 { font-size: 22px; }
.svc ul { margin: 0; padding-left: 1.2em; }
.svc .more { font-weight: 700; color: var(--night-2); }

/* 料金 */
.plans { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.plans.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 26px; display: grid; gap: 12px; align-content: start; min-width: 0; }
.plan.featured { border: 2px solid var(--accent); }
.plan .kind { font-size: 12px; color: var(--ink-soft); }
.plan h3 { font-size: 19px; }
.plan .price { font-family: var(--serif); font-size: 28px; font-weight: 900; color: var(--night); font-variant-numeric: tabular-nums; }
.plan .price small { font-family: var(--sans); font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-left: 4px; }
.plan .fit { font-size: 14px; color: var(--ink-soft); }
.plan .note { font-size: 12.5px; color: var(--ink-soft); border-top: 1px dashed var(--line); padding-top: 10px; }
.price-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.price-list li { display: flex; justify-content: space-between; gap: 10px; border-bottom: 1px dotted var(--line); padding-bottom: 4px; }
.price-list li span:last-child { white-space: nowrap; font-weight: 700; }
.plans-note { margin-top: 18px; font-size: 13.5px; color: var(--ink-soft); }

/* 理由 */
.reasons { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; }
.reason { display: grid; gap: 10px; align-content: start; min-width: 0; }
.reason .bar { width: 36px; height: 4px; border-radius: 2px; }
.reason:nth-child(1) .bar { background: var(--spring); } .reason:nth-child(2) .bar { background: var(--summer); }
.reason:nth-child(3) .bar { background: var(--autumn); } .reason:nth-child(4) .bar { background: var(--winter); }
.reason h3 { font-size: 17px; }
.reason p { font-size: 14.5px; color: var(--ink-soft); }

/* 事例 */
.draft-flag { display: inline-block; justify-self: start; background: #fff1b8; color: #5a4300; border: 1px dashed #d9b84a; border-radius: 6px; padding: 4px 12px; font-size: 13px; font-weight: 700; }
.case-tabs { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
.case-col { display: grid; gap: 16px; align-content: start; min-width: 0; }
.case-col h3.col { font-size: 19px; padding-left: 12px; border-left: 4px solid var(--accent); }
.case { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 22px; display: grid; gap: 10px; }
.case .who { font-size: 12.5px; color: var(--ink-soft); }
.case h4 { font-size: 17px; }
.case dl { margin: 0; display: grid; gap: 8px; font-size: 14.5px; }
.case dt { font-size: 12px; font-weight: 700; color: var(--night-2); }
.case dd { margin: 0; }
.case .meta { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 12.5px; color: var(--ink-soft); border-top: 1px dashed var(--line); padding-top: 10px; font-variant-numeric: tabular-nums; }

/* 流れ */
.flow { list-style: none; margin: 0; padding: 0; display: grid; counter-reset: f; max-width: 820px; }
.flow li { counter-increment: f; display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding-block: 18px; border-bottom: 1px solid var(--line); }
.flow li::before { content: counter(f); font-family: var(--serif); font-size: 26px; font-weight: 900; color: var(--accent); text-align: center; }
.flow h3 { font-size: 17px; margin-bottom: 4px; }
.flow p { font-size: 14.5px; color: var(--ink-soft); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px 18px; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin-top: 8px; color: var(--ink-soft); font-size: 15px; }

/* 相談の案内 */
.cta { background: var(--night); color: var(--on-night); text-align: center; }
.cta h2 { font-size: clamp(22px, 3vw, 28px); margin-bottom: 10px; }
.cta p { color: var(--on-night-soft); margin-bottom: 26px; }
.cta .actions { justify-content: center; }
.cta .tel-note { margin: 16px auto 0; }

/* 事務所案内 */
.co { margin: 0; border-top: 1px solid var(--line); max-width: 820px; }
.co div { display: grid; grid-template-columns: 10em 1fr; gap: 16px; padding-block: 15px; border-bottom: 1px solid var(--line); }
.co dt { font-weight: 700; }
.co dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }

/* フォーム */
.form { display: grid; gap: 22px; max-width: 720px; }
.field { display: grid; gap: 6px; }
.label-row { display: flex; align-items: center; gap: 8px; }
.field label, .field legend { font-weight: 700; font-size: 15px; }
.req { font-size: 11px; background: var(--night-2); color: #fff; border-radius: 4px; padding: 0 6px; }
.opt { font-size: 11px; background: var(--mist); color: var(--ink-soft); border-radius: 4px; padding: 0 6px; }
.field input[type="text"], .field input[type="email"], .field input[type="tel"], .field textarea, .field select { width: 100%; font: inherit; font-size: 16px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); }
.field textarea { min-height: 180px; resize: vertical; }
.field .hint { font-size: 13px; color: var(--ink-soft); }
fieldset.field { border: 0; padding: 0; margin: 0; }
.choices { display: flex; gap: 10px 22px; flex-wrap: wrap; }
.choices label { font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.agree { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.agree input { margin-top: 7px; width: 18px; height: 18px; }
.hp { position: absolute; left: -9999px; }
.note-box { background: var(--card); border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; padding: 14px 18px; font-size: 14px; max-width: 720px; display: grid; gap: 4px; }

.doc { max-width: 780px; }
.doc h2 { font-size: 19px; margin-block: 32px 10px; }
.doc ol, .doc ul { padding-left: 1.4em; }

/* フッター */
.ft { background: #151a2e; color: #b9bccb; font-size: 13.5px; }
.ft .wrap { padding-block: 32px; display: grid; gap: 8px; }
.ft b { color: #f4f1ea; font-family: var(--serif); font-size: 16px; }
.ft nav { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 6px; }
.ft a { text-decoration: none; }
.ft a:hover { color: #f4f1ea; }
.ft small { font-size: 11px; color: #8a8ea3; }

@media (max-width: 860px) {
  .hero .wrap, .svc, .plans, .plans.two, .case-tabs { grid-template-columns: 1fr; }
  .reasons { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .nav a:not(.btn) { display: none; }
  .hero::before { background: rgba(20,25,46,.82); }
}
@media (max-width: 480px) {
  .reasons { grid-template-columns: 1fr; }
  .sec { padding-block: 56px; }
  .co div { grid-template-columns: 1fr; gap: 0; }
  .actions .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }