:root {
  --lp-brand: #146f62;
  --lp-accent: #1a8f7d;
  --lp-text: #1e293b;
  --lp-text-sub: #475569;
  --lp-bg: #ffffff;
  --lp-bg-alt: #f7faf9;
  --lp-border: #e2e8f0;
  --lp-radius: 8px;
  --lp-max-w: 1080px;
  --lp-section-py: 72px;
}

#landing { font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif; color: var(--lp-text); line-height: 1.75; -webkit-font-smoothing: antialiased; }

.lp-header { position: sticky; top: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 56px; background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--lp-border); }
.lp-header-logo { font-size: 18px; font-weight: 700; color: var(--lp-brand); text-decoration: none; }
.lp-header-link { color: var(--lp-brand); text-decoration: none; font-size: 14px; font-weight: 600; padding: 6px 16px; border: 1.5px solid var(--lp-brand); border-radius: 6px; transition: background 0.2s, color 0.2s; }
.lp-header-link:hover { background: var(--lp-brand); color: #fff; }

.lp-section-title { font-size: 26px; font-weight: 700; text-align: center; margin-bottom: 40px; letter-spacing: 0.01em; }

.lp-hero { text-align: center; padding: 80px 24px 64px; background: linear-gradient(168deg, var(--lp-bg-alt) 0%, #eef6f4 100%); }
.lp-hero-title { font-size: 28px; font-weight: 800; line-height: 1.45; margin-bottom: 16px; }
.lp-hero-sub { font-size: 15px; color: var(--lp-text-sub); margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.lp-hero-cta { display: inline-block; padding: 14px 36px; background: var(--lp-brand); color: #fff; font-size: 16px; font-weight: 600; border-radius: var(--lp-radius); text-decoration: none; transition: background 0.2s, transform 0.15s; }
.lp-hero-cta:hover { background: var(--lp-accent); transform: translateY(-1px); }
.lp-hero-note { font-size: 13px; color: var(--lp-text-sub); margin-top: 12px; }

.lp-why { padding: var(--lp-section-py) 24px; }
.lp-why-grid { display: grid; gap: 20px; max-width: var(--lp-max-w); margin: 0 auto; }
.lp-why-card { padding: 28px 24px; border: 1px solid var(--lp-border); border-radius: var(--lp-radius); background: var(--lp-bg); }
.lp-why-icon { font-size: 28px; display: block; margin-bottom: 8px; }
.lp-why-heading { font-size: 17px; margin-bottom: 8px; }
.lp-why-text { font-size: 14px; color: var(--lp-text-sub); margin: 0; }

.lp-features { padding: var(--lp-section-py) 24px; background: var(--lp-bg-alt); }
.lp-features-grid { display: grid; gap: 20px; max-width: var(--lp-max-w); margin: 0 auto; }
.lp-feature-card { padding: 24px; background: var(--lp-bg); border-radius: var(--lp-radius); border: 1px solid var(--lp-border); }
.lp-feature-icon { font-size: 24px; display: block; margin-bottom: 6px; }
.lp-feature-heading { font-size: 16px; margin-bottom: 6px; color: var(--lp-brand); }
.lp-feature-text { font-size: 14px; color: var(--lp-text-sub); margin: 0; }

.lp-howto { padding: var(--lp-section-py) 24px; }
.lp-howto-steps { display: grid; gap: 24px; max-width: var(--lp-max-w); margin: 0 auto; }
.lp-howto-step { text-align: center; padding: 24px; }
.lp-howto-number { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin: 0 auto 16px; background: var(--lp-brand); color: #fff; font-weight: 700; font-size: 18px; border-radius: 50%; }
.lp-howto-heading { font-size: 16px; margin-bottom: 8px; }
.lp-howto-text { font-size: 14px; color: var(--lp-text-sub); margin: 0; }

.lp-pricing { padding: var(--lp-section-py) 24px; background: var(--lp-bg-alt); }
.lp-pricing-grid { display: grid; gap: 20px; max-width: 720px; margin: 0 auto; }
.lp-pricing-card { padding: 32px 24px; border: 1px solid var(--lp-border); border-radius: var(--lp-radius); background: var(--lp-bg); text-align: center; }
.lp-pricing-plan { font-size: 18px; margin-bottom: 8px; }
.lp-pricing-price { font-size: 32px; font-weight: 800; margin-bottom: 20px; }
.lp-pricing-period { font-size: 16px; font-weight: 400; color: var(--lp-text-sub); }
.lp-pricing-features { list-style: none; padding: 0; margin-bottom: 24px; font-size: 14px; color: var(--lp-text-sub); text-align: left; }
.lp-pricing-features li { padding: 6px 0; border-bottom: 1px solid var(--lp-border); }
.lp-pricing-card--primary { border-color: var(--lp-brand); border-width: 2px; position: relative; }
.lp-pricing-card--primary::after { content: "おすすめ"; position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--lp-brand); color: #fff; font-size: 12px; font-weight: 600; padding: 2px 14px; border-radius: 10px; }
.lp-pricing-cta { display: inline-block; padding: 10px 28px; background: var(--lp-brand); color: #fff; font-size: 14px; font-weight: 600; border-radius: var(--lp-radius); text-decoration: none; transition: background 0.2s; }
.lp-pricing-cta:hover { background: var(--lp-accent); }

.lp-faq { padding: var(--lp-section-py) 24px; }
.lp-faq-item { max-width: 720px; margin: 0 auto 8px; border: 1px solid var(--lp-border); border-radius: var(--lp-radius); overflow: hidden; }
.lp-faq-question { padding: 16px 20px; font-size: 15px; font-weight: 600; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; }
.lp-faq-question::after { content: "+"; font-size: 20px; color: var(--lp-text-sub); transition: transform 0.2s; }
.lp-faq-item[open] .lp-faq-question::after { transform: rotate(45deg); }
.lp-faq-question::-webkit-details-marker { display: none; }
.lp-faq-answer p { padding: 0 20px 16px; font-size: 14px; color: var(--lp-text-sub); }

.lp-final-cta { text-align: center; padding: var(--lp-section-py) 24px; background: linear-gradient(168deg, #eef6f4 0%, var(--lp-bg-alt) 100%); }
.lp-final-cta-title { font-size: 24px; font-weight: 700; margin-bottom: 16px; }
.lp-final-cta-sub { font-size: 15px; color: var(--lp-text-sub); margin-bottom: 28px; }

.lp-footer { padding: 32px 24px; text-align: center; font-size: 13px; color: var(--lp-text-sub); border-top: 1px solid var(--lp-border); }
.lp-footer a { color: var(--lp-text-sub); text-decoration: none; margin: 0 12px; }
.lp-footer a:hover { color: var(--lp-brand); }

@media (min-width: 769px) {
  .lp-header { padding: 0 40px; }
  .lp-hero { padding: 104px 40px 80px; }
  .lp-hero-title { font-size: 40px; }
  .lp-hero-sub { font-size: 17px; }
  .lp-section-title { font-size: 30px; margin-bottom: 48px; }
  .lp-why-grid { grid-template-columns: repeat(2, 1fr); }
  .lp-features-grid { grid-template-columns: repeat(3, 1fr); }
  .lp-howto-steps { grid-template-columns: repeat(3, 1fr); }
  .lp-pricing-grid { grid-template-columns: repeat(2, 1fr); }
}