/* stak Phase 5 運用代行 LP — モダン + テック + 信頼性重視 */

:root {
  --c-bg: #fafafa;
  --c-ink: #0a0a0a;
  --c-ink-soft: #404040;
  --c-cyan: #00D4FF;
  --c-cyan-dark: #008CCC;
  --c-purple: #8B5CF6;
  --c-line: #e5e5e5;
  --c-muted: #888;
  --c-success: #10b981;
  --f-sans: "Inter", "Noto Sans JP", -apple-system, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--f-sans);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.lp-section-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 100px 24px;
}

/* === AB Variant 表示制御 === */
.variant-a .variant-b { display: none; }
.variant-b .variant-a { display: none; }

/* === Section 1: Hero === */
.lp-hero {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a0e2e 100%);
  color: white;
  padding: 140px 24px 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.lp-hero::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.lp-hero-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.lp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
  margin: 0 0 32px;
  font-weight: 600;
  padding: 8px 18px;
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 100px;
  background: rgba(0,212,255,0.05);
}
.lp-hero-headline {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 32px;
  color: white;
}
.lp-hero-headline strong {
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}
.lp-hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  margin: 0 0 48px;
  line-height: 1.9;
}
.lp-hero-sub strong { color: var(--c-cyan); font-weight: 600; }

/* === CTA === */
.lp-cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0 0 48px;
}
.lp-cta-group-center { justify-content: center; }

.lp-cta-primary, .lp-cta-secondary, .lp-cta-plan {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 100px;
  font-weight: 600;
  text-decoration: none;
  font-size: 15px;
  transition: all 0.25s ease;
}
.lp-cta-primary {
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: white;
  box-shadow: 0 8px 32px rgba(0,212,255,0.3);
}
.lp-cta-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(0,212,255,0.4); }
.lp-cta-secondary {
  background: rgba(255,255,255,0.1);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
}
.lp-cta-secondary:hover { background: rgba(255,255,255,0.2); }
.lp-cta-large { padding: 20px 40px; font-size: 17px; }
.arr { transition: transform 0.25s ease; }
.lp-cta-primary:hover .arr { transform: translateX(4px); }

.lp-social-proof {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin: 0;
}

/* === Section 共通 === */
.lp-section-title {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 800;
  text-align: center;
  margin: 0 0 16px;
  color: var(--c-ink);
  letter-spacing: -0.03em;
}
.lp-section-sub {
  text-align: center;
  font-size: 16px;
  color: var(--c-muted);
  margin: 0 0 64px;
}

/* === Section 2: Empathy === */
.lp-empathy { background: white; }
.lp-pain-list {
  list-style: none;
  padding: 0;
  margin: 0 auto 48px;
  max-width: 640px;
}
.lp-pain-list li {
  position: relative;
  padding: 20px 20px 20px 48px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
}
.lp-pain-list li::before {
  content: "✓";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}
.lp-empathy-close {
  text-align: center;
  font-size: 18px;
  color: var(--c-ink);
  margin: 0;
  line-height: 1.9;
}
.lp-empathy-close strong { color: var(--c-cyan-dark); }

/* === Section 3: Services === */
.lp-services { background: var(--c-bg); }
.lp-service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.lp-service-card {
  background: white;
  padding: 32px 24px;
  border-radius: 16px;
  border: 1px solid var(--c-line);
  transition: all 0.25s ease;
}
.lp-service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); }
.lp-service-num {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
  margin: 0 0 12px;
  font-weight: 700;
}
.lp-service-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--c-ink);
}
.lp-service-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin: 0;
}

/* === Section 4: Plans === */
.lp-plans { background: white; }
.lp-plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}
.lp-plan-card {
  background: var(--c-bg);
  padding: 40px 32px;
  border-radius: 20px;
  border: 1px solid var(--c-line);
  text-align: center;
  position: relative;
  transition: all 0.25s ease;
}
.lp-plan-card:hover { transform: translateY(-4px); }
.lp-plan-recommended {
  border: 2px solid var(--c-cyan);
  background: white;
  box-shadow: 0 16px 48px rgba(0,212,255,0.15);
  transform: translateY(-8px);
}
.lp-plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: white;
  padding: 6px 20px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.lp-plan-label {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  margin: 0 0 8px;
}
.lp-plan-desc {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0 0 24px;
}
.lp-plan-price {
  margin: 0 0 32px;
}
.lp-plan-price .amount {
  font-size: 42px;
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -0.03em;
}
.lp-plan-price .unit {
  font-size: 14px;
  color: var(--c-muted);
  margin-left: 4px;
}
.lp-plan-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  text-align: left;
}
.lp-plan-card ul li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 14px;
  color: var(--c-ink-soft);
}
.lp-plan-card ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--c-cyan);
  font-weight: 700;
}
.lp-cta-plan {
  background: transparent;
  color: var(--c-ink);
  border: 1.5px solid var(--c-ink);
  width: 100%;
  justify-content: center;
}
.lp-cta-plan-primary {
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  color: white;
  border: none;
}
.lp-cta-plan:hover { background: var(--c-ink); color: white; }
.lp-plan-note {
  text-align: center;
  margin-top: 32px;
  font-size: 13px;
  color: var(--c-cyan-dark);
  font-weight: 500;
}

/* === Section 5: Proof === */
.lp-proof { background: var(--c-bg); }
.lp-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.lp-stat-card {
  background: white;
  padding: 40px 24px;
  border-radius: 16px;
  text-align: center;
  border: 1px solid var(--c-line);
}
.lp-stat-num {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--c-cyan), var(--c-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 0 8px;
  letter-spacing: -0.03em;
}
.lp-stat-label {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}
.lp-proof-note {
  text-align: center;
  margin-top: 48px;
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 2;
}
.lp-proof-note a { color: var(--c-cyan-dark); font-weight: 500; text-decoration: none; }
.lp-proof-note a:hover { text-decoration: underline; }

/* === Section 6: Closing === */
.lp-closing {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a0e2e 100%);
  color: white;
}
.lp-closing-inner { text-align: center; padding: 120px 24px; }
.lp-closing-headline {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin: 0 0 24px;
  color: white;
  letter-spacing: -0.03em;
}
.lp-closing-sub {
  font-size: 18px;
  margin: 0 0 48px;
  color: rgba(255,255,255,0.85);
  line-height: 1.9;
}
.lp-trust {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin: 64px 0 0;
}

.lp-foot {
  background: #050505;
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 32px 24px;
  font-size: 12px;
}
.lp-foot a { color: rgba(255,255,255,0.7); text-decoration: none; margin: 0 8px; }
.lp-foot a:hover { color: white; }

/* === Mobile === */
@media (max-width: 720px) {
  .lp-hero { padding: 80px 20px 60px; }
  .lp-section-inner { padding: 60px 20px; }
  .lp-cta-primary, .lp-cta-secondary { width: 100%; justify-content: center; }
  .lp-cta-group { flex-direction: column; }
  .lp-plan-recommended { transform: none; }
  .lp-social-proof { gap: 16px; flex-direction: column; }
}