@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;600;700;900&family=Noto+Sans+JP:wght@300;400;500;700&family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #0D1F3C;
  --primary-light: #1A3A6B;
  --accent: #B8943A;
  --accent-light: #D4AF6A;
  --accent-pale: #F5EDD8;
  --white: #FFFFFF;
  --bg-light: #F7F9FC;
  --bg-gray: #EDF0F5;
  --text-dark: #0D1F3C;
  --text-medium: #3D4F6B;
  --text-light: #7B8FA8;
  --border: #DDE3ED;
  --danger: #C0392B;
  --shadow-sm: 0 2px 12px rgba(13, 31, 60, 0.06);
  --shadow-md: 0 6px 30px rgba(13, 31, 60, 0.1);
  --shadow-lg: 0 12px 50px rgba(13, 31, 60, 0.14);
  --shadow-xl: 0 24px 80px rgba(13, 31, 60, 0.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-serif: 'Noto Serif JP', 'Georgia', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-en: 'Inter', sans-serif;
  --max-width: 1200px;
  --content-width: 820px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* =====================
   スクロールプログレスバー
   ===================== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* =====================
   サイトヘッダー（共通）
   ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.logo-tagline {
  font-size: 0.65rem;
  color: var(--text-light);
  letter-spacing: 0.08em;
  font-family: var(--font-en);
  font-weight: 400;
  text-transform: uppercase;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-item {
  font-size: 0.7rem;
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border: 1px solid var(--accent);
  border-radius: 30px;
}

/* =====================
   ヒーローセクション（トップ）
   ===================== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 80% at 70% 50%, rgba(26,58,107,0.6) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(184,148,58,0.12) 0%, transparent 60%),
    linear-gradient(135deg, #060E1E 0%, #0D1F3C 50%, #0F2548 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-noise {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
}

.hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 120px 40px 100px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(184,148,58,0.1);
  border: 1px solid rgba(184,148,58,0.3);
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 28px;
}

.hero-label::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.25;
  color: var(--white);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

.hero-title .accent {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.9;
  color: rgba(255,255,255,0.7);
  margin-bottom: 44px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: var(--primary);
  padding: 15px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
  letter-spacing: 0.02em;
  box-shadow: 0 4px 20px rgba(184,148,58,0.35);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(184,148,58,0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: rgba(255,255,255,0.85);
  padding: 15px 32px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.25);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.4);
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
}

.stat-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(184,148,58,0.3);
}

.stat-number {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.stat-sub {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.35);
  margin-top: 4px;
  font-family: var(--font-en);
}

/* =====================
   SNS事例フィード（トップ）
   ===================== */
.sns-section {
  background: var(--bg-light);
  padding: 100px 0;
  overflow: hidden;
}

.section-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  margin-bottom: 60px;
}

.section-eyebrow {
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-eyebrow::before {
  content: '';
  display: block;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 900;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-medium);
  max-width: 600px;
  line-height: 1.8;
}

.sns-feed-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

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

.sns-post {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.sns-post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--danger), #E74C3C);
}

.sns-post.type-yahoo::before { background: linear-gradient(90deg, #6C3483, #9B59B6); }
.sns-post.type-x::before { background: linear-gradient(90deg, #17202A, #34495E); }
.sns-post.type-5ch::before { background: linear-gradient(90deg, #117A65, #1ABC9C); }

.sns-post:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.post-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.post-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.post-meta {
  flex: 1;
  min-width: 0;
}

.post-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-platform {
  font-size: 0.72rem;
  color: var(--text-light);
  font-family: var(--font-en);
}

.post-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-en);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: #FDEDEC;
  color: var(--danger);
  white-space: nowrap;
}

.post-text {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-medium);
  margin-bottom: 16px;
  font-style: italic;
}

.post-text strong {
  color: var(--danger);
  font-style: normal;
}

.post-analysis {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border-left: 3px solid var(--accent);
}

.post-analysis-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--font-en);
}

.post-analysis-text {
  font-size: 0.82rem;
  color: var(--text-medium);
  line-height: 1.6;
}

/* =====================
   科学メソッドセクション
   ===================== */
.method-section {
  padding: 100px 0;
  background: var(--white);
}

.method-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  margin-top: 60px;
}

.method-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  z-index: 0;
}

.method-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 8px;
}

.step-number {
  width: 72px;
  height: 72px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(13,31,60,0.25);
  transition: var(--transition);
  border: 3px solid var(--white);
  outline: 2px solid var(--primary);
}

.method-step:hover .step-number {
  transform: scale(1.1);
  background: var(--accent);
  color: var(--primary);
}

.step-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.step-desc {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* =====================
   記事一覧（カテゴリフィルター）
   ===================== */
.articles-section {
  padding: 100px 0;
  background: var(--bg-light);
}

.articles-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  margin-top: 40px;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-medium);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.filter-tab.active {
  font-weight: 700;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(184,148,58,0.25);
}

.article-card-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-card-thumb .thumb-label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

.article-card-thumb::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(transparent, rgba(0,0,0,0.2));
}

.card-category {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.cat-science { background: rgba(26,58,107,0.9); color: #fff; }
.cat-sns { background: rgba(192,57,43,0.9); color: #fff; }
.cat-politics { background: rgba(109,40,135,0.9); color: #fff; }
.cat-relations { background: rgba(22,101,79,0.9); color: #fff; }
.cat-basics { background: rgba(184,148,58,0.9); color: var(--primary); }
.cat-philosophy { background: rgba(30,39,46,0.9); color: #fff; }

.article-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.55;
  margin-bottom: 12px;
  flex: 1;
}

.article-card-title a {
  text-decoration: none;
  color: inherit;
}

.article-card-title a:hover {
  color: var(--accent);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-light);
  font-family: var(--font-en);
  padding-top: 14px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* =====================
   感情論診断テスト（トップ）
   ===================== */
.quiz-section {
  padding: 100px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}

.quiz-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.quiz-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
}

.quiz-inner .section-title {
  color: var(--white);
}

.quiz-inner .section-desc {
  color: rgba(255,255,255,0.65);
}

.quiz-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-top: 48px;
  backdrop-filter: blur(10px);
}

.quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}

.quiz-progress-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.5s ease;
}

.quiz-count {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  white-space: nowrap;
}

.quiz-question {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.6;
  margin-bottom: 32px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.92rem;
  color: rgba(255,255,255,0.8);
  text-align: left;
  width: 100%;
}

.quiz-option:hover {
  background: rgba(184,148,58,0.15);
  border-color: rgba(184,148,58,0.4);
  color: var(--white);
}

.quiz-option.selected {
  background: rgba(184,148,58,0.2);
  border-color: var(--accent);
  color: var(--white);
}

.option-letter {
  width: 28px;
  height: 28px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

.quiz-nav {
  display: flex;
  justify-content: flex-end;
  margin-top: 28px;
}

.quiz-btn {
  padding: 12px 28px;
  background: var(--accent);
  color: var(--primary);
  border: none;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.quiz-btn:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.quiz-result {
  display: none;
  text-align: center;
  padding: 20px 0;
}

.result-score {
  font-family: var(--font-en);
  font-size: 5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.result-label {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.result-desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  max-width: 480px;
  margin: 0 auto 28px;
}

.result-retry {
  font-size: 0.85rem;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  background: none;
  border: none;
  font-family: var(--font-sans);
}

/* =====================
   インフォ・テキストセクション
   ===================== */
.info-section {
  padding: 100px 0;
  background: var(--white);
}

.info-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.info-text-wrap .section-header {
  padding: 0;
  margin-bottom: 32px;
}

.info-body {
  font-size: 0.97rem;
  color: var(--text-medium);
  line-height: 1.9;
}

.info-body p {
  margin-bottom: 18px;
}

.info-body strong {
  color: var(--primary);
  font-weight: 700;
}

.info-visual {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
}

.info-visual-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.evidence-levels {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.evidence-level {
  display: flex;
  align-items: center;
  gap: 12px;
}

.level-bar-wrap {
  flex: 1;
  height: 28px;
  background: var(--bg-gray);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.level-bar {
  height: 100%;
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding-left: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
  overflow: hidden;
}

.level-bar.l1 { width: 100%; background: linear-gradient(90deg, #1A5276, #2980B9); }
.level-bar.l2 { width: 80%; background: linear-gradient(90deg, #1E8449, #27AE60); }
.level-bar.l3 { width: 60%; background: linear-gradient(90deg, #7D6608, #F39C12); }
.level-bar.l4 { width: 35%; background: linear-gradient(90deg, #922B21, #E74C3C); }
.level-bar.l5 { width: 10%; background: linear-gradient(90deg, #4A235A, #8E44AD); }

.level-rank {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-light);
  width: 24px;
  text-align: center;
}

/* =====================
   フッター
   ===================== */
.site-footer {
  background: var(--primary);
  padding: 60px 40px 36px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 28px;
}

.footer-logo .logo-name {
  color: var(--white);
  font-size: 1.15rem;
}

.footer-logo .logo-tagline {
  color: rgba(255,255,255,0.4);
}

.footer-mission {
  max-width: 480px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-en);
}

.footer-disclaimer {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  line-height: 1.6;
  margin-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
}

/* =====================
   記事ページ専用スタイル
   ===================== */
.article-hero {
  background: var(--primary);
  padding: 80px 0 70px;
  position: relative;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(26,58,107,0.5) 0%, transparent 70%);
}

.article-hero-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 28px;
  font-family: var(--font-en);
}

.article-breadcrumb a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}

.article-breadcrumb a:hover {
  color: var(--accent);
}

.article-category-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 4px;
  background: rgba(184,148,58,0.2);
  color: var(--accent);
  border: 1px solid rgba(184,148,58,0.4);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-en);
  margin-bottom: 20px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-en);
}

/* 記事本文エリア */
.article-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 40px 100px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 60px;
  align-items: start;
}

.article-body {
  min-width: 0;
}

/* 目次 */
.toc-box {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 28px 24px;
  margin-bottom: 48px;
  position: relative;
}

.toc-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.toc-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-list li a {
  font-size: 0.85rem;
  color: var(--text-medium);
  text-decoration: none;
  display: block;
  padding: 4px 0;
  padding-left: 14px;
  border-left: 2px solid transparent;
  transition: var(--transition);
  line-height: 1.5;
}

.toc-list li a:hover {
  color: var(--primary);
  border-color: var(--accent);
  padding-left: 20px;
}

.toc-list li.h3 a {
  padding-left: 28px;
  font-size: 0.8rem;
  color: var(--text-light);
}

/* 記事本文 */
.prose {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-medium);
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.4;
  margin-top: 64px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
  position: relative;
}

.prose h2::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.5;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 4px solid var(--accent);
}

.prose h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.prose p {
  margin-bottom: 20px;
}

.prose strong {
  color: var(--primary);
  font-weight: 700;
}

.prose em {
  font-style: italic;
  color: var(--text-dark);
}

.prose ul,
.prose ol {
  padding-left: 28px;
  margin-bottom: 24px;
}

.prose li {
  margin-bottom: 8px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 32px;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.prose th {
  background: var(--primary);
  color: var(--white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  font-size: 0.85rem;
}

.prose td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-medium);
}

.prose tr:last-child td { border-bottom: none; }
.prose tr:nth-child(even) td { background: var(--bg-light); }

/* SNS投稿引用ブロック */
.sns-quote {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 28px 0;
  box-shadow: var(--shadow-sm);
}

.sns-quote-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.sns-quote-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.sns-quote-info {
  flex: 1;
}

.sns-quote-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-dark);
}

.sns-quote-platform {
  font-size: 0.72rem;
  color: var(--text-light);
  font-family: var(--font-en);
}

.sns-quote-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  background: #FDEDEC;
  color: var(--danger);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.sns-quote-text {
  padding: 20px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border);
  font-style: italic;
}

.sns-quote-analysis {
  padding: 14px 20px;
  background: #FFF8E8;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.analysis-icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.analysis-content {
  font-size: 0.83rem;
  color: #5D4037;
  line-height: 1.65;
}

.analysis-content strong {
  color: #3E2723;
  font-weight: 700;
}

/* キーポイントボックス */
.key-point {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin: 32px 0;
  color: var(--white);
}

.key-point-label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.key-point-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
}

.key-point-text strong {
  color: var(--white);
  font-weight: 800;
}

/* 警告ボックス */
.warning-box {
  background: #FEF9E7;
  border: 1px solid #F9E79F;
  border-left: 4px solid #F39C12;
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.92rem;
  color: #7D6608;
  line-height: 1.7;
}

/* 科学的手法フローチャート */
.method-flow {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 32px 0;
}

.method-flow-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  text-align: center;
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flow-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  position: relative;
}

.flow-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 19px;
  top: 44px;
  bottom: -12px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--primary));
}

.flow-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 0.9rem;
  font-weight: 900;
  color: var(--accent);
  flex-shrink: 0;
  z-index: 1;
}

.flow-content {
  padding-bottom: 28px;
  flex: 1;
}

.flow-content:last-child { padding-bottom: 0; }

.flow-title {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.flow-desc {
  font-size: 0.85rem;
  color: var(--text-medium);
  line-height: 1.7;
}

/* サイドバー */
.article-sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-toc {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-toc-title {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-toc-list a {
  font-size: 0.8rem;
  color: var(--text-medium);
  text-decoration: none;
  display: block;
  padding: 5px 8px 5px 12px;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: var(--transition);
  line-height: 1.5;
}

.sidebar-toc-list a:hover,
.sidebar-toc-list a.active {
  color: var(--primary);
  background: var(--white);
  border-color: var(--accent);
}

.sidebar-share {
  background: var(--primary);
  border-radius: var(--radius-md);
  padding: 24px;
  color: var(--white);
}

.sidebar-share-title {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: rgba(255,255,255,0.8);
}

.share-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.share-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.share-btn.x-share {
  background: rgba(255,255,255,0.08);
  color: var(--white);
}

.share-btn.x-share:hover {
  background: rgba(255,255,255,0.15);
}

.share-btn.copy-share {
  background: rgba(184,148,58,0.2);
  color: var(--accent);
  border: 1px solid rgba(184,148,58,0.3);
}

.share-btn.copy-share:hover {
  background: rgba(184,148,58,0.3);
}

/* =====================
   スクロールアニメーション
   ===================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* =====================
   レスポンシブ
   ===================== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .method-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .method-steps::before { display: none; }

  .method-step {
    flex-direction: row;
    text-align: left;
    gap: 20px;
    align-items: flex-start;
  }

  .step-number {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .info-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .sns-feed {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner { padding: 14px 20px; }
  .hero-inner { padding: 80px 20px 60px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }

  .section-header { padding: 0 20px; }
  .sns-feed-wrap,
  .articles-inner,
  .method-inner,
  .info-inner,
  .quiz-inner { padding: 0 20px; }

  .sns-feed { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }

  .article-hero-inner,
  .article-layout { padding: 0 20px; }

  .article-layout { padding: 40px 20px 60px; }

  .quiz-card { padding: 28px 20px; }

  .footer-top {
    flex-direction: column;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .footer-inner { padding: 0; }
  .site-footer { padding: 48px 20px 28px; }
}