/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, #0D9488 0%, #065F56 100%);
  color: #fff;
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-buttons .btn-primary {
  background: #fff;
  color: var(--color-primary) !important;
}

.hero-buttons .btn-primary:hover {
  opacity: 0.9;
}

.hero-buttons .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.hero-buttons .btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

/* ── Problems (課題提起) ── */
.problems {
  background: var(--color-surface);
}

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

.problem-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.problem-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--color-primary);
}

.problem-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-subtext);
}

/* ── Services ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: box-shadow 0.3s, transform 0.3s;
}

.service-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--color-subtext);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.service-link:hover {
  text-decoration: underline;
}

/* ── Reasons ── */
.reasons {
  background: var(--color-surface);
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.reason-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  box-shadow: var(--shadow);
}

.reason-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
}

.reason-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.reason-card p {
  font-size: 14px;
  color: var(--color-subtext);
  line-height: 1.6;
}

/* ── CTA ── */
.cta-section {
  text-align: center;
  padding: 80px 0;
  background: var(--color-surface);
}

.cta-section h2 {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.cta-section p {
  font-size: 15px;
  color: var(--color-subtext);
  margin-bottom: 32px;
}

.cta-section .btn-primary {
  background: var(--color-primary);
  color: #fff;
  font-size: 16px;
  padding: 16px 40px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    padding: 72px 0 56px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .problems-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .reasons-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 56px 0 40px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
  }
}