/* ===== HearScience — 共通スタイル ===== */

:root {
  --bg-primary: #fff8f2;
  --bg-secondary: #fff3e6;
  --bg-card: #ffffff;
  --bg-card-hover: #ffeedd;
  --accent-blue: #b5454e;
  --accent-cyan: #c75b7a;
  --accent-purple: #8b6090;
  --accent-green: #8b3558;
  --accent-orange: #d4690a;
  --accent-red: #c0392b;
  --text-primary: #2d1a22;
  --text-secondary: #5c3848;
  --text-muted: #8a6872;
  --border: rgba(199, 91, 122, 0.18);
  --border-bright: rgba(199, 91, 122, 0.45);
  --glow-blue: rgba(181, 69, 78, 0.08);
  --glow-cyan: rgba(199, 91, 122, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
}

/* ===== ナビゲーション ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 248, 242, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  box-shadow: 0 1px 6px rgba(199, 91, 122, 0.08);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-logo span {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.9rem;
  margin-left: 0.5rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: all 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-cyan);
  background: var(--glow-cyan);
}

/* ===== ヒーロー ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 5rem;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(199,91,122,0.10) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  background: rgba(199,91,122,0.10);
  border: 1px solid var(--border-bright);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #2d1a22 30%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

/* ===== セクション共通 ===== */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
}

h2.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}

h2.section-title .accent {
  color: var(--accent-cyan);
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 680px;
  margin-bottom: 3rem;
}

/* ===== フェーズカード（ホーム） ===== */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.5rem;
}

.phase-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s;
  display: block;
  position: relative;
  overflow: hidden;
}

.phase-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent, var(--accent-blue));
  border-radius: 16px 16px 0 0;
}

.phase-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-bright);
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(199,91,122,0.14), 0 0 0 1px var(--border-bright);
}

.phase-num {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.phase-icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.phase-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.phase-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.phase-card .phase-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}

.tag {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: rgba(199,91,122,0.07);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ===== 詳細ページ ===== */
.page-hero {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem 3rem;
}

.page-hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb span { margin: 0 0.4rem; }

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.page-hero p.lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
}

/* ===== コンテンツレイアウト ===== */
.content-layout {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

/* ===== 情報ブロック ===== */
.info-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2rem;
}

.info-block h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.info-block h2 .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--glow-cyan);
  border: 1px solid var(--border-bright);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.info-block h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--accent-blue);
}

.info-block p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 0.75rem;
}

.info-block ul, .info-block ol {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  line-height: 1.85;
}

.info-block li {
  margin-bottom: 0.5rem;
}

.info-block li strong {
  color: var(--text-primary);
}

/* ===== 障害カード ===== */
.disorder-card {
  background: rgba(192, 57, 43, 0.05);
  border: 1px solid rgba(192, 57, 43, 0.22);
  border-radius: 12px;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.disorder-card .disorder-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.disorder-icon {
  font-size: 1.4rem;
}

.disorder-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #b03020;
  margin: 0;
}

.disorder-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 0.5rem;
}

.disorder-card ul {
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  line-height: 1.8;
}

/* ===== 補聴器対応カード ===== */
.hearing-aid-card {
  background: rgba(199, 91, 122, 0.07);
  border: 1px solid rgba(199, 91, 122, 0.25);
  border-radius: 12px;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.hearing-aid-card .ha-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hearing-aid-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-green);
  margin: 0;
}

.hearing-aid-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 0.5rem;
}

.hearing-aid-card ul {
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  line-height: 1.8;
}

.hearing-aid-card li strong {
  color: var(--text-primary);
}

/* ===== 限界カード ===== */
.limitation-card {
  background: rgba(212, 105, 10, 0.06);
  border: 1px solid rgba(212, 105, 10, 0.22);
  border-radius: 12px;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.limitation-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-orange);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.limitation-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== メカニズム図 ===== */
.mechanism-visual {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  margin: 2rem 0;
}

.mechanism-visual img {
  max-width: 100%;
  border-radius: 8px;
}

.mechanism-caption {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 1rem;
  line-height: 1.6;
}

/* ===== データハイライト ===== */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.1;
}

.stat-unit {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* ===== 症状逆引き ===== */
.symptom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.symptom-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s;
  display: block;
}

.symptom-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.symptom-q {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.symptom-q::before {
  content: "Q. ";
  color: var(--accent-cyan);
}

.symptom-links {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.symptom-link-tag {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: rgba(199,91,122,0.10);
  color: var(--accent-blue);
  border: 1px solid rgba(199,91,122,0.28);
}

/* ===== テーブル ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 1.5rem 0;
}

.data-table th {
  background: rgba(199,91,122,0.10);
  color: var(--accent-blue);
  font-weight: 700;
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 2px solid var(--border);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}

.data-table td strong {
  color: var(--text-primary);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: rgba(199,91,122,0.03); }

/* ===== AI企業カード ===== */
.maker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.maker-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
}

.maker-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--accent-cyan);
}

.maker-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.maker-card .maker-model {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ===== フッター ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-nav a {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-nav a:hover { color: var(--accent-cyan); }

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== フッター：関連サイトロゴ ===== */
.footer-partners {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  padding: 2rem 0;
  margin: 0 0 2rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.footer-partners > div:not(.footer-partner-label) {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-partner-label {
  width: 100%;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.footer-partner-link {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  padding: 0.75rem 1.25rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.25s;
  text-decoration: none;
}

.footer-partner-link:hover {
  background: #ffffff;
  border-color: var(--border-bright);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(199,91,122,0.15);
}

.footer-partner-link img {
  display: block;
  max-height: 56px;
  max-width: 220px;
  width: auto;
  object-fit: contain;
}

.footer-partner-name {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  text-align: center;
  display: block;
}

@media (max-width: 480px) {
  .footer-partners { gap: 1.5rem; }
  .footer-partner-link img { max-height: 44px; max-width: 160px; }
}

/* ===== 次ページナビ ===== */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.page-nav a {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.25s;
  min-width: 200px;
  flex: 1;
}

.page-nav a:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-bright);
}

.page-nav .nav-direction {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-nav .nav-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.page-nav a.next { text-align: right; }

/* ===== 画像ビジュアル ===== */
.visual-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin: 2rem 0;
}

.visual-box img {
  width: 100%;
  display: block;
}

.visual-box figcaption {
  padding: 1.25rem 1.75rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  line-height: 1.7;
}

/* ===== ハイライトボックス ===== */
.highlight-box {
  background: rgba(199,91,122,0.06);
  border-left: 4px solid var(--accent-blue);
  border-radius: 0 10px 10px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.highlight-box p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0;
}

.highlight-box strong {
  color: var(--text-primary);
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { padding: 4rem 1.5rem 3rem; }
  .section { padding: 3rem 1.5rem; }
  .content-layout { padding: 2.5rem 1.25rem; }
  .info-block { padding: 1.75rem; }
  .page-hero { padding: 2.5rem 1.25rem 2rem; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 0.6rem 0.75rem; }
}