/* ===== STYLE v2 ENHANCEMENTS ===== */
/* 2026-07-05 品質リフレッシュ版
   改善点:
   1. Header: Sticky化＋scroll時の背景フェード
   2. CTA: 多層戦略（Hero内CTA × 下部固定CTA）
   3. 信頼要素: testimonials / clients-logo-row
   4. レスポンシブ: 900px以下で mobile-optimized layout
   5. a11y: prefers-reduced-motion 対応
*/

/* ===== ベース（v1から継承） ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, system-ui, sans-serif;
  background: #0a0a14;
  color: #ffffff;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

:root {
  --accent-cyan: #00E5FF;
  --accent-magenta: #FF1AC2;
  --bg-deep: #0a0a14;
  --bg-soft: #11121e;
  --text-muted: rgba(255,255,255,0.6);
  --border-faint: rgba(255,255,255,0.08);
  /* v2: セカンダリカラー追加 */
  --accent-green: #2ECC71;
  --accent-gold: #FFD700;
}

.container { width: min(1180px, 92%); margin-inline: auto; }
.accent { color: var(--accent-cyan); }
.accent-text { color: var(--accent-magenta); font-weight: 700; }

/* ===== HEADER（v2 改善） ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 24px 5%;
  display: flex; justify-content: space-between; align-items: center;
  backdrop-filter: blur(8px);
  background: rgba(10,10,20,0.3);  /* v2: 初期は薄い背景 */
  border-bottom: 1px solid var(--border-faint);
  transition: background 0.4s, backdrop-filter 0.4s;
}

/* v2: Scroll時にbackground強化 */
.site-header.scrolled {
  background: rgba(10,10,20,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.logo {
  font-family: 'Unbounded', 'Inter', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}
.site-nav { display: flex; gap: 32px; align-items: center; font-size: 0.88rem; }
.site-nav a { color: var(--text-muted); transition: color 0.3s; }
.site-nav a:hover { color: #fff; }
.nav-cta {
  padding: 10px 22px;
  background: var(--accent-cyan);
  color: #0a0a14 !important;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 0 20px rgba(0,229,255,0.2);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0,229,255,0.4);
}

/* ===== HERO（v2 改善） ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}
.hero-video {
  position: absolute; top: 50%; left: 50%;
  min-width: 100%; min-height: 100%;
  width: auto; height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 1;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,10,20,0.4) 0%, rgba(10,10,20,0.6) 60%, rgba(10,10,20,0.95) 100%);
  z-index: 2;
}
.hero-content {
  position: relative; z-index: 3;
  text-align: center;
  width: min(900px, 92%);
}
.hero-eyebrow {
  font-family: 'Unbounded', sans-serif;
  font-size: 0.78rem; letter-spacing: 0.4em;
  color: var(--accent-cyan);
  margin-bottom: 28px;
}
.hero-title {
  font-family: 'Unbounded', 'Inter', sans-serif;
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
}
.title-line-1 { display: block; }
.title-line-2 { display: block; }
.hero-sub {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  margin-bottom: 60px;
  line-height: 1.8;
}

/* v2: CTA グループ化 */
.hero-cta-group {
  display: flex; gap: 20px; justify-content: center;
  margin-bottom: 80px;
}
.hero-cta {
  padding: 14px 40px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
}
.hero-cta.primary {
  background: var(--accent-cyan);
  color: #0a0a14;
  box-shadow: 0 0 30px rgba(0,229,255,0.3);
}
.hero-cta.primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 40px rgba(0,229,255,0.5);
}
.hero-cta.secondary {
  border: 2px solid var(--accent-cyan);
  color: var(--accent-cyan);
}
.hero-cta.secondary:hover {
  background: rgba(0,229,255,0.1);
  transform: translateY(-4px);
}

.hero-scroll {
  display: inline-flex; flex-direction: column; align-items: center; gap: 14px;
  font-size: 0.72rem; letter-spacing: 0.4em;
  color: var(--text-muted);
  font-family: 'Unbounded', sans-serif;
  animation: float-down 2s ease-in-out infinite;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--accent-cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.4; }
}
@keyframes float-down {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ===== Section Common ===== */
section { padding: 140px 0; }
.section-label {
  font-family: 'Unbounded', sans-serif;
  font-size: 0.72rem; letter-spacing: 0.4em;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}
.section-title {
  font-family: 'Unbounded', 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 64px;
}

/* ===== PROBLEM ===== */
.problem { background: var(--bg-deep); }
.strike { color: var(--text-muted); text-decoration: line-through; text-decoration-thickness: 2px; }
.problem-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}
.stat-card {
  background: var(--bg-soft);
  padding: 40px 24px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  text-align: center;
  transition: border-color 0.3s;
}
.stat-card:hover {
  border-color: var(--accent-cyan);
}
.stat-num {
  font-family: 'Unbounded', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}
.stat-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}
.problem-copy {
  text-align: center;
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
}

/* ===== SOLUTION ===== */
.solution { background: var(--bg-soft); }
.solution-copy {
  text-align: center;
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 64px;
  line-height: 1.8;
}
.solution-compare {
  display: flex; justify-content: center; align-items: center; gap: 40px;
  flex-wrap: wrap;
}
.compare-col {
  background: rgba(255,255,255,0.05);
  padding: 32px 40px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  min-width: 280px;
  text-align: center;
}
.compare-before { opacity: 0.6; }
.compare-after { border: 1px solid var(--accent-cyan); }
.compare-label { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }
.compare-price { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.compare-time { font-size: 0.9rem; color: var(--text-muted); }
.compare-arrow {
  font-size: 1.5rem;
  color: var(--accent-magenta);
  font-weight: bold;
}

/* ===== FEATURES ===== */
.features { background: var(--bg-deep); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature-card {
  background: var(--bg-soft);
  padding: 40px 32px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  text-align: center;
  transition: all 0.3s;
}
.feature-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,229,255,0.1);
}
.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  opacity: 0.8;
}
.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  font-weight: 700;
}
.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== PRICE（v2 改善） ===== */
.price { background: var(--bg-soft); }
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}
.price-card {
  background: var(--bg-deep);
  padding: 40px 32px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  text-align: center;
  position: relative;
  transition: all 0.3s;
}
.price-card:hover {
  border-color: var(--accent-cyan);
}
.price-card.featured {
  border: 2px solid var(--accent-magenta);
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(255,26,194,0.2);
}
.featured-badge {
  position: absolute; top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent-magenta);
  color: white;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.price-name { font-size: 1.4rem; font-weight: 700; margin-bottom: 16px; margin-top: 8px; }
.price-amount {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}
.yen { font-size: 1.5rem; }
.tax { font-size: 0.8rem; color: var(--text-muted); }
.price-list {
  text-align: left;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 2;
}
.price-list li {
  padding: 6px 0;
}
.price-list li::before {
  content: '✓ ';
  color: var(--accent-green);
  font-weight: bold;
  margin-right: 8px;
}
.price-list li:has(::before) { color: rgba(255,255,255,0.8); }
.price-action {
  display: inline-block;
  padding: 12px 32px;
  background: rgba(0,229,255,0.15);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
}
.price-action:hover {
  background: var(--accent-cyan);
  color: #0a0a14;
  box-shadow: 0 0 20px rgba(0,229,255,0.3);
}
.price-action.featured {
  background: var(--accent-magenta);
  border-color: var(--accent-magenta);
  color: white;
}
.price-action.featured:hover {
  background: transparent;
  color: var(--accent-magenta);
  box-shadow: 0 0 20px rgba(255,26,194,0.3);
}

/* ===== SOCIAL PROOF（v2 新規） ===== */
.social-proof { background: var(--bg-deep); }
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 80px;
}
.testimonial-card {
  background: rgba(255,255,255,0.03);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  transition: all 0.3s;
}
.testimonial-card:hover {
  border-color: var(--accent-cyan);
  background: rgba(0,229,255,0.05);
}
.testimonial-header {
  margin-bottom: 20px;
}
.testimonial-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.testimonial-role {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.testimonial-quote {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
  margin-bottom: 16px;
  border-left: 3px solid var(--accent-cyan);
  padding-left: 16px;
}
.testimonial-result {
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 600;
}

.clients-section {
  text-align: center;
}
.clients-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.clients-logo-row {
  display: flex; justify-content: center; gap: 40px;
  flex-wrap: wrap;
}
.client-logo-placeholder {
  width: 120px;
  height: 60px;
  background: rgba(255,255,255,0.05);
  border: 1px dashed var(--border-faint);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ===== PROCESS ===== */
.process { background: var(--bg-soft); }
.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step {
  background: var(--bg-deep);
  padding: 40px 24px;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  text-align: center;
  position: relative;
}
.step::after {
  content: '';
  position: absolute; right: -24px; top: 50%;
  width: 24px; height: 1px;
  background: var(--border-faint);
}
.step:last-child::after { display: none; }
.step-num {
  font-family: 'Unbounded', sans-serif;
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}
.step h3 { font-size: 1.2rem; margin-bottom: 12px; font-weight: 700; }
.step p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ===== CTA ===== */
.cta { background: var(--bg-deep); padding: 140px 0; }
.cta-title {
  font-family: 'Unbounded', 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.25;
  margin-bottom: 32px;
  text-align: center;
}
.cta-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 48px;
  line-height: 1.8;
}
.cta-button {
  display: inline-block;
  width: 100%;
  max-width: 400px;
  margin-left: auto; margin-right: auto;
  padding: 20px 40px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  color: white;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  transition: all 0.3s;
  box-shadow: 0 0 40px rgba(0,229,255,0.3);
  cursor: pointer;
  display: block;
}
.cta-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 60px rgba(0,229,255,0.5);
}
.cta-divider {
  text-align: center;
  margin: 32px 0;
  color: var(--text-muted);
}
.contact-options {
  display: flex; justify-content: center; gap: 20px;
  margin-bottom: 32px;
}
.contact-option {
  padding: 12px 28px;
  border: 1px solid var(--border-faint);
  border-radius: 6px;
  font-size: 0.95rem;
  transition: all 0.3s;
}
.contact-option:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.cta-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== STICKY CTA（v2 新規） ===== */
.sticky-cta-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 99;
  background: linear-gradient(135deg, rgba(0,229,255,0.9), rgba(255,26,194,0.9));
  backdrop-filter: blur(12px);
  padding: 16px;
  display: none;
  opacity: 0;
  transform: translateY(100%);
  transition: all 0.4s;
}
.sticky-cta-bar.show {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}
.sticky-cta-content {
  display: flex; justify-content: space-between; align-items: center;
  .container;
  width: min(1180px, 92%);
  margin: 0 auto;
  width: 100%;
}
.sticky-cta-content p {
  font-weight: 700;
  font-size: 0.95rem;
  color: #0a0a14;
}
.sticky-cta-button {
  padding: 10px 24px;
  background: #0a0a14;
  color: var(--accent-cyan);
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.3s;
}
.sticky-cta-button:hover {
  background: rgba(0,0,0,0.8);
  transform: translateX(4px);
}

/* ===== FOOTER（v2 改善） ===== */
.site-footer {
  background: rgba(0,0,0,0.5);
  border-top: 1px solid var(--border-faint);
  padding: 80px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 64px;
}
.footer-section h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-logo {
  font-family: 'Unbounded', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-links {
  display: flex; flex-direction: column; gap: 12px;
}
.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.3s;
}
.footer-links a:hover {
  color: var(--accent-cyan);
}
.footer-bottom {
  border-top: 1px solid var(--border-faint);
  padding-top: 32px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-legal {
  display: flex; gap: 20px;
}
.footer-legal a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.3s;
}
.footer-legal a:hover {
  color: var(--accent-cyan);
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== RESPONSIVE（v2） ===== */
/* Tablet: 900px - 1200px */
@media (max-width: 1200px) {
  .features-grid,
  .price-grid,
  .testimonials { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile: 899px以下（v2 詳細化） */
@media (max-width: 899px) {
  .site-nav {
    gap: 16px;
    font-size: 0.8rem;
  }
  .nav-cta {
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .hero { padding-top: 60px; min-height: 600px; }
  .hero-title { font-size: clamp(1.8rem, 5vw, 2.8rem); }
  .hero-cta-group {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  .hero-cta {
    width: 100%;
    padding: 12px 24px;
  }

  section { padding: 80px 0; }
  .section-title { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }

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

  .features-grid,
  .price-grid,
  .testimonials { grid-template-columns: 1fr; }
  .price-card.featured { transform: scale(1); }

  .process-timeline { grid-template-columns: 1fr; }
  .step::after { display: none; }

  .contact-options { flex-direction: column; }
  .contact-option { width: 100%; }

  .clients-logo-row { gap: 20px; }
  .client-logo-placeholder { width: 100px; height: 50px; }

  .sticky-cta-content { flex-direction: column; gap: 12px; text-align: center; }
  .sticky-cta-content p { margin-bottom: 0; }

  .footer-top { grid-template-columns: 1fr; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-legal { justify-content: center; }
}

/* ===== a11y: prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}