/* Birdwing Technologies 共通スタイル（案A: コーポレート信頼系） */
:root {
  --navy: #1F3A5F; --navy-dark: #16293F; --orange: #E07B39; --orange-dark: #C96A28;
  --gray: #4A5568; --muted: #8B97A5; --light: #F5F7FA; --border: #D9E0E8;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "Noto Sans JP", sans-serif; color: #2D3748; line-height: 1.9; background: #fff; }
.serif { font-family: "Noto Serif JP", serif; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
img { max-width: 100%; }

/* Header */
header { border-bottom: 1px solid var(--border); background: #fff; position: sticky; top: 0; z-index: 20; }
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { font-weight: 700; font-size: 19px; color: var(--navy); text-decoration: none; letter-spacing: .02em; }
.logo span { color: var(--orange); }
nav { display: flex; align-items: center; }
nav a { color: var(--gray); text-decoration: none; margin-left: 26px; font-size: 14px; }
nav a:hover { color: var(--navy); }
nav a.nav-cta { background: var(--navy); color: #fff; padding: 10px 22px; border-radius: 4px; }
nav a.nav-cta:hover { background: var(--navy-dark); color: #fff; }

/* Hero（トップ用） */
.hero { background: linear-gradient(180deg, #FBFCFE 0%, var(--light) 100%); padding: 88px 0 72px; border-bottom: 1px solid var(--border); }
.hero-label { color: var(--orange); font-weight: 700; font-size: 14px; letter-spacing: .15em; margin-bottom: 16px; }
.hero h1 { font-size: 40px; line-height: 1.5; color: var(--navy); margin-bottom: 20px; }
.hero p.lead { color: var(--gray); max-width: 600px; margin-bottom: 32px; }
.hero-note { font-size: 12px; color: var(--muted); margin-top: 12px; }

/* ページヘッダー（下層ページ用） */
.page-head { background: var(--light); border-bottom: 1px solid var(--border); padding: 48px 0 40px; }
.page-head .en { color: var(--orange); font-weight: 700; font-size: 13px; letter-spacing: .2em; }
.page-head h1 { font-size: 30px; color: var(--navy); }

/* ボタン */
.btn-primary { display: inline-block; background: var(--orange); color: #fff; font-weight: 700; padding: 16px 40px; border-radius: 4px; text-decoration: none; }
.btn-primary:hover { background: var(--orange-dark); }
.btn-sub { display: inline-block; color: var(--navy); font-weight: 500; padding: 16px 24px; text-decoration: none; }
.btn-outline { display: inline-block; border: 2px solid var(--navy); color: var(--navy); font-weight: 700; padding: 14px 36px; border-radius: 4px; text-decoration: none; }

/* セクション共通 */
.section { padding: 72px 0; }
.section.alt { background: var(--light); }
.section-label { text-align: center; color: var(--orange); font-weight: 700; font-size: 13px; letter-spacing: .2em; margin-bottom: 8px; }
.section h2 { text-align: center; font-size: 28px; color: var(--navy); margin-bottom: 12px; }
.section .section-lead { text-align: center; color: var(--muted); font-size: 14px; margin-bottom: 44px; }

/* カード群 */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card { border: 1px solid var(--border); background: #fff; padding: 28px 24px; }
.card.topline { border-top: 3px solid var(--navy); }
.card .num { font-family: "Noto Serif JP", serif; color: var(--orange); font-size: 26px; font-weight: 700; margin-bottom: 10px; }
.card h3 { font-size: 17px; color: var(--navy); margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--gray); }

/* サービスカード */
.service { background: #fff; border: 1px solid var(--border); padding: 24px; }
.service h3 { font-size: 16px; color: var(--navy); margin-bottom: 8px; padding-bottom: 8px; border-bottom: 2px solid var(--orange); display: inline-block; }
.service p { font-size: 13px; color: var(--gray); margin-bottom: 12px; }
.service .price { font-weight: 700; color: var(--navy); font-size: 15px; }
.service .price small { color: var(--muted); font-weight: 400; }

/* キャンペーン帯 */
.campaign { background: var(--navy); color: #fff; text-align: center; padding: 48px 24px; }
.campaign .badge { display: inline-block; border: 1px solid rgba(255,255,255,.4); padding: 4px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 16px; letter-spacing: .1em; }
.campaign h2 { font-size: 26px; margin-bottom: 8px; color: #fff; }
.campaign .price-line { font-size: 18px; margin-bottom: 24px; }
.campaign .price-line strong { color: #FFB477; font-size: 32px; }
.campaign .cond { font-size: 12px; color: rgba(255,255,255,.7); margin-top: 14px; }

/* 流れ */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.flow-step { background: #fff; border: 1px solid var(--border); padding: 24px 20px; position: relative; }
.flow-step .step-num { color: var(--orange); font-family: "Noto Serif JP", serif; font-weight: 700; font-size: 22px; margin-bottom: 8px; }
.flow-step h3 { font-size: 15px; color: var(--navy); margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--gray); }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq details { border: 1px solid var(--border); background: #fff; margin-bottom: 12px; }
.faq summary { cursor: pointer; padding: 18px 20px; font-weight: 700; color: var(--navy); font-size: 15px; list-style: none; position: relative; padding-right: 44px; }
.faq summary::after { content: "＋"; position: absolute; right: 20px; top: 16px; color: var(--orange); font-size: 18px; }
.faq details[open] summary::after { content: "−"; }
.faq .a { padding: 0 20px 18px; font-size: 14px; color: var(--gray); }

/* 料金表 */
.price-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.price-table th, .price-table td { border: 1px solid var(--border); padding: 14px 16px; text-align: left; vertical-align: top; }
.price-table thead th { background: var(--navy); color: #fff; text-align: center; }
.price-table thead th.light-col { background: #2E7D7B; }
.price-table thead th.full-col { background: var(--orange); }
.price-table td .p { font-weight: 700; color: var(--navy); font-size: 16px; }
.price-table td .d { font-size: 13px; color: var(--gray); }
.price-table tbody th { background: var(--light); color: var(--navy); width: 160px; }

/* 会社概要 */
.company-table { width: 100%; border-collapse: collapse; font-size: 14px; max-width: 780px; margin: 0 auto; }
.company-table th, .company-table td { border-bottom: 1px solid var(--border); padding: 16px 12px; text-align: left; }
.company-table th { color: var(--navy); width: 180px; font-weight: 700; }
.profile { display: flex; gap: 32px; align-items: flex-start; max-width: 780px; margin: 0 auto 56px; }
.avatar { flex-shrink: 0; width: 140px; height: 140px; border-radius: 50%; background: var(--navy); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 36px; font-weight: 700; font-family: "Noto Serif JP", serif; }
.profile .name { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.profile .title { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.profile p { font-size: 14px; color: var(--gray); }

/* フォーム */
.form-wrap { max-width: 640px; margin: 0 auto; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-weight: 700; color: var(--navy); font-size: 14px; margin-bottom: 6px; }
.form-group .req { color: var(--orange); font-size: 11px; margin-left: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 1px solid var(--border); padding: 12px 14px; font-size: 15px; font-family: inherit; border-radius: 4px; background: #fff; }
.form-group textarea { min-height: 140px; }
.form-note { font-size: 12px; color: var(--muted); margin-top: 20px; }

/* CTA帯 */
.cta-band { background: var(--light); border-top: 1px solid var(--border); text-align: center; padding: 64px 24px; }
.cta-band h2 { font-size: 24px; color: var(--navy); margin-bottom: 12px; }
.cta-band p { color: var(--gray); font-size: 14px; margin-bottom: 28px; }

/* 準備中 */
.placeholder-box { text-align: center; padding: 80px 24px; border: 1px dashed var(--border); background: var(--light); max-width: 780px; margin: 0 auto; }
.placeholder-box .mark { font-size: 40px; margin-bottom: 12px; }
.placeholder-box h3 { color: var(--navy); margin-bottom: 10px; }
.placeholder-box p { font-size: 14px; color: var(--gray); }

/* フッター */
footer { background: var(--navy-dark); color: rgba(255,255,255,.75); padding: 40px 0 32px; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 20px; }
.footer-links a { color: rgba(255,255,255,.75); text-decoration: none; margin-right: 20px; }
.footer-links a:hover { color: #fff; }
.copyright { margin-top: 20px; color: rgba(255,255,255,.5); }

/* プライバシーポリシー等の文章ページ */
.prose { max-width: 780px; margin: 0 auto; font-size: 14px; color: var(--gray); }
.prose h2 { font-size: 18px; color: var(--navy); margin: 32px 0 10px; text-align: left; }
.prose ul { padding-left: 22px; margin: 8px 0; }

/* レスポンシブ */
@media (max-width: 820px) {
  .hero h1 { font-size: 30px; }
  .grid3, .grid2, .flow { grid-template-columns: 1fr; }
  nav a:not(.nav-cta) { display: none; }
  .profile { flex-direction: column; align-items: center; text-align: center; }
  .profile p { text-align: left; }
  .price-table { display: block; overflow-x: auto; }
  .section { padding: 48px 0; }
}

/* ツール（AI活用度チェック・作業時間の試算） */
.tool-cards .card { display: flex; flex-direction: column; }
.tool-cards .card .tag { display: inline-block; align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--orange); border: 1px solid var(--orange); border-radius: 20px; padding: 2px 12px; margin-bottom: 12px; }
.tool-cards .card p { flex-grow: 1; margin-bottom: 20px; }
.tool-cards .card .btn-outline { text-align: center; padding: 12px 20px; }
.tool-wrap { max-width: 780px; margin: 0 auto; }
.tool-intro { font-size: 14px; color: var(--gray); margin-bottom: 32px; }
.progress { height: 6px; background: var(--border); border-radius: 3px; margin-bottom: 8px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--orange); width: 0; transition: width .3s; }
.progress-text { font-size: 12px; color: var(--muted); margin-bottom: 24px; text-align: right; }
.q-block { border: 1px solid var(--border); background: #fff; padding: 24px; margin-bottom: 16px; }
.q-block .q-area { font-size: 12px; color: var(--orange); font-weight: 700; letter-spacing: .05em; }
.q-block h3 { font-size: 16px; color: var(--navy); margin: 4px 0 14px; }
.choice { display: block; border: 1px solid var(--border); border-radius: 4px; padding: 10px 14px; margin-bottom: 8px; font-size: 14px; color: var(--gray); cursor: pointer; }
.choice:hover { border-color: var(--navy); }
.choice input { margin-right: 10px; accent-color: var(--orange); }
.choice:has(input:checked) { border-color: var(--orange); background: #FFF7F0; color: var(--navy); }
.tool-actions { text-align: center; margin: 32px 0; }
.tool-actions button { font-family: inherit; font-size: 16px; border: none; cursor: pointer; }
.tool-actions button:disabled { background: var(--muted); cursor: not-allowed; }
.result { border: 2px solid var(--navy); background: #fff; padding: 32px 28px; margin-top: 8px; }
.result .stage-label { font-size: 13px; color: var(--orange); font-weight: 700; letter-spacing: .1em; }
.result h2 { text-align: left; font-size: 24px; color: var(--navy); margin: 4px 0 12px; }
.result h3 { font-size: 16px; color: var(--navy); margin: 24px 0 10px; }
.result p, .result li { font-size: 14px; color: var(--gray); }
.result ul { padding-left: 22px; }
.stage-scale { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin: 16px 0 8px; }
.stage-scale div { font-size: 12px; text-align: center; padding: 6px 2px; background: var(--light); color: var(--muted); border-radius: 3px; }
.stage-scale div.on { background: var(--navy); color: #fff; font-weight: 700; }
.bars { margin-top: 8px; }
.bar-row { display: grid; grid-template-columns: 140px 1fr 48px; align-items: center; gap: 12px; font-size: 13px; color: var(--gray); margin-bottom: 8px; }
.bar-track { height: 10px; background: var(--light); border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--navy); }
.bar-row .v { text-align: right; color: var(--navy); font-weight: 700; }
.result .cta-box { background: var(--light); padding: 20px; margin-top: 28px; text-align: center; }
.result .cta-box p { margin-bottom: 14px; }
.calc-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.calc-table th, .calc-table td { border-bottom: 1px solid var(--border); padding: 12px 8px; text-align: left; vertical-align: middle; }
.calc-table thead th { color: var(--navy); font-size: 13px; border-bottom: 2px solid var(--navy); }
.calc-table td.num, .calc-table th.num { text-align: right; white-space: nowrap; }
.calc-table input[type=number] { width: 80px; border: 1px solid var(--border); border-radius: 4px; padding: 6px 8px; font-size: 15px; font-family: inherit; text-align: right; }
.calc-table .rate { color: var(--muted); font-size: 13px; }
.calc-table .task-desc { display: block; font-size: 12px; color: var(--muted); }
.calc-settings { display: flex; flex-wrap: wrap; gap: 16px 32px; margin: 24px 0; font-size: 14px; color: var(--navy); }
.calc-settings label { font-weight: 700; }
.calc-settings input { width: 100px; border: 1px solid var(--border); border-radius: 4px; padding: 6px 8px; font-size: 15px; font-family: inherit; text-align: right; margin: 0 6px; }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 8px 0 16px; }
.kpi { background: var(--light); padding: 18px 12px; text-align: center; }
.kpi .k { font-size: 12px; color: var(--muted); }
.kpi .v { font-family: "Noto Serif JP", serif; font-size: 28px; font-weight: 700; color: var(--navy); line-height: 1.4; }
.kpi .v small { font-size: 14px; margin-left: 2px; }
.tool-note { font-size: 12px; color: var(--muted); margin-top: 16px; }
@media (max-width: 820px) {
  .kpis { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 96px 1fr 40px; }
  .calc-table thead { display: none; }
  .calc-table tr { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; padding: 14px 0; border-bottom: 1px solid var(--border); }
  .calc-table td { border: none; padding: 0; }
  .calc-table td:first-child, .calc-table td:last-child { grid-column: 1 / -1; }
  .calc-table td.num { text-align: left; }
  .calc-table td[data-label]::before { content: attr(data-label); display: block; font-size: 12px; color: var(--muted); }
  .calc-table td:last-child[data-label]::before { display: inline; margin-right: 8px; }
  .calc-table td:last-child { color: var(--navy); font-weight: 700; }
  .calc-table input[type=number] { width: 72px; }
}
@media (max-width: 480px) {
  .header-inner { height: 60px; }
  .logo { font-size: 16px; white-space: nowrap; }
  nav a.nav-cta { padding: 8px 14px; font-size: 13px; white-space: nowrap; margin-left: 12px; }
}

/* 問い合わせフォーム：エラー表示・ボット対策欄・Turnstile */
.form-alert { background: #FDECEC; border: 1px solid #E8A3A3; color: #9B2C2C; padding: 12px 16px; border-radius: 6px; font-size: 14px; margin-bottom: 24px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.cf-turnstile { margin-bottom: 20px; }
#submitBtn:disabled { opacity: .6; cursor: wait; }