/* ==========================================================
   空き家投資家ナビ HP スタイル
   ターゲット: 個人投資家(楽待・健美家利用層)
   トーン: 信頼・スピード・プロフェッショナル
   ========================================================== */

:root {
  --navy: #10263f;
  --navy-deep: #0a1a2e;
  --gold: #c9a04e;
  --gold-light: #e3c98a;
  --line-green: #06c755;
  --line-green-dark: #05b34c;
  --text: #1e2a38;
  --text-sub: #55647a;
  --bg: #ffffff;
  --bg-gray: #f4f6f9;
  --border: #e2e7ee;
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; vertical-align: middle; }
a { color: inherit; }

/* ---------- 共通レイアウト ---------- */
.section-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 20px;
}

.section-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 8px;
  text-align: center;
}

.section-title {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  text-align: center;
  line-height: 1.5;
  margin-bottom: 40px;
  color: var(--navy);
}

.sp-only { display: none; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--navy);
  color: var(--gold-light);
}

.header-nav {
  display: flex;
  gap: 20px;
  margin-left: auto;
}

.header-nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  transition: color 0.2s;
}

.header-nav a:hover { color: var(--navy); }

.header-cta {
  flex-shrink: 0;
  text-decoration: none;
  background: var(--gold);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: 999px;
  transition: background 0.2s;
}

.header-cta:hover { background: #b58c3e; }

/* ---------- ヒーロー ---------- */
.hero {
  background:
    radial-gradient(ellipse 80% 60% at 85% 10%, rgba(201, 160, 78, 0.18), transparent 60%),
    linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 55%, #1a3a5c 100%);
  color: #fff;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 88px 20px 72px;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold-light);
  border: 1px solid rgba(227, 201, 138, 0.5);
  border-radius: 999px;
  padding: 6px 18px;
  margin-bottom: 24px;
}

.hero-title {
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  font-size: clamp(30px, 5.6vw, 52px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
}

.hero-title span { display: block; }

.hero-title em {
  font-style: normal;
  color: var(--gold-light);
}

.hero-lead {
  max-width: 640px;
  margin: 24px auto 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
}

.hero-cta { margin-top: 36px; }

.hero-points {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-points li {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 7px 18px;
}

.hero-points strong { color: var(--gold-light); font-weight: 700; }

/* ---------- ボタン ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--line-green);
  color: #fff;
  text-decoration: none;
  font-size: 17px;
  font-weight: 700;
  padding: 16px 36px;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(6, 199, 85, 0.35);
  transition: transform 0.15s, background 0.2s;
}

.btn-primary:hover {
  background: var(--line-green-dark);
  transform: translateY(-2px);
}

.btn-primary .btn-sub {
  font-size: 13px;
  font-weight: 500;
  opacity: 0.9;
}

.btn-large { font-size: 19px; padding: 18px 44px; }

/* ---------- こんな方へ ---------- */
.audience { background: var(--bg); }

.audience-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.audience-list li {
  background: var(--bg-gray);
  border-radius: var(--radius);
  padding: 28px 24px;
  border-top: 3px solid var(--gold);
}

.audience-list h3 {
  font-size: 17px;
  color: var(--navy);
  margin-bottom: 10px;
  line-height: 1.5;
}

.audience-list p { font-size: 14px; color: var(--text-sub); }

/* ---------- 特徴 ---------- */
.features { background: var(--bg-gray); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: 0 2px 12px rgba(16, 38, 63, 0.06);
}

.feature-num {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 19px;
  color: var(--navy);
  line-height: 1.5;
  margin-bottom: 14px;
}

.feature-card p { font-size: 14px; color: var(--text-sub); }

/* ---------- 基礎知識 ---------- */
.knowledge { background: var(--bg); }

.knowledge-body > p {
  max-width: 800px;
  margin: 0 auto 36px;
  font-size: 15px;
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.knowledge-grid article {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.knowledge-grid h3 {
  font-size: 16px;
  color: var(--navy);
  margin-bottom: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--gold);
  line-height: 1.5;
}

.knowledge-grid p { font-size: 14px; color: var(--text-sub); }

.knowledge-note {
  max-width: 800px;
  margin: 28px auto 0;
  font-size: 12px;
  color: var(--text-sub);
}

/* ---------- 流れ ---------- */
.flow { background: var(--bg-gray); }

.flow-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: flow;
}

.flow-list li {
  background: #fff;
  border-radius: var(--radius);
  padding: 26px 22px;
  position: relative;
  box-shadow: 0 2px 12px rgba(16, 38, 63, 0.06);
}

.flow-step {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  background: var(--navy);
  border-radius: 4px;
  padding: 3px 10px;
  margin-bottom: 12px;
}

.flow-list h3 {
  font-size: 16px;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.5;
}

.flow-list p { font-size: 13px; color: var(--text-sub); }

/* ---------- FAQ ---------- */
.faq { background: var(--bg); }

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 48px 18px 52px;
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  position: relative;
  list-style: none;
  line-height: 1.6;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::before {
  content: "Q";
  position: absolute;
  left: 20px;
  top: 17px;
  font-family: Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--gold);
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--gold);
  transition: transform 0.2s;
}

.faq-list details[open] summary::after { content: "−"; }

.faq-list details p {
  padding: 0 24px 20px 52px;
  font-size: 14px;
  color: var(--text-sub);
}

/* ---------- CTAバンド ---------- */
.cta-band {
  background:
    radial-gradient(ellipse 70% 80% at 15% 100%, rgba(201, 160, 78, 0.16), transparent 60%),
    linear-gradient(200deg, var(--navy-deep) 0%, var(--navy) 60%, #1a3a5c 100%);
  color: #fff;
  text-align: center;
}

.cta-title {
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  font-size: clamp(24px, 4.4vw, 36px);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-lead {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}

.cta-note {
  margin-top: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 運営会社 ---------- */
.company { background: var(--bg); }

.company-table {
  max-width: 720px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.company-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  border-bottom: 1px solid var(--border);
}

.company-row dt {
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  background: var(--bg-gray);
}

.company-row dd { padding: 16px 20px; font-size: 14px; }

.company-row a { color: #2263a8; }

/* ---------- フッター ---------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.75);
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 20px 32px;
  text-align: center;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.footer-desc { font-size: 13px; margin-top: 6px; }

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 28px 0;
}

.footer-nav a {
  font-size: 13px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.2s;
}

.footer-nav a:hover { color: #fff; }

.footer-copyright { font-size: 12px; color: rgba(255, 255, 255, 0.45); }

/* ---------- 法務ページ(privacy) ---------- */
.legal-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 64px 20px;
}

.legal-header { text-align: center; margin-bottom: 48px; }

.legal-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.legal-title {
  font-size: clamp(24px, 4vw, 32px);
  color: var(--navy);
  margin-top: 8px;
}

.legal-section { margin-bottom: 36px; }

.legal-section h2 {
  font-size: 18px;
  color: var(--navy);
  padding-left: 12px;
  border-left: 3px solid var(--gold);
  margin-bottom: 12px;
  line-height: 1.5;
}

.legal-section p, .legal-section li { font-size: 14px; color: var(--text); }

.legal-section ul { padding-left: 22px; margin-top: 8px; }

.legal-intro { font-size: 14px; margin-bottom: 36px; }

.legal-contact { border-top: 1px solid var(--border); margin-top: 12px; }

.legal-contact-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  border-bottom: 1px solid var(--border);
}

.legal-contact-row dt {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-gray);
  color: var(--navy);
}

.legal-contact-row dd { padding: 12px 16px; font-size: 13px; }

.legal-date { margin-top: 40px; font-size: 13px; color: var(--text-sub); }

.legal-back { margin-top: 32px; text-align: center; }

.legal-back a { font-size: 14px; color: #2263a8; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .header-nav { display: none; }

  .audience-list,
  .feature-grid,
  .knowledge-grid { grid-template-columns: 1fr; }

  .flow-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .sp-only { display: inline; }

  .section-inner { padding: 56px 18px; }

  .hero-inner { padding: 64px 18px 56px; }

  .hero-lead { font-size: 14px; }

  .btn-primary { font-size: 15px; padding: 15px 26px; }

  .btn-large { font-size: 16px; padding: 16px 30px; }

  .flow-list { grid-template-columns: 1fr; }

  .company-row,
  .legal-contact-row { grid-template-columns: 1fr; }

  .company-row dt, .legal-contact-row dt { padding-bottom: 4px; }

  .company-row dd, .legal-contact-row dd { padding-top: 8px; }
}