:root {
  --bg: #ffffff;
  --bg-alt: #f4f7f9;
  --text: #16232e;
  --text-sub: #5b6b7a;
  --brand: #1c7a6b;
  --brand-dark: #145d52;
  --border: #e2e8ec;
  --radius: 12px;
  --max: 1040px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.4; margin: 0; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* header */
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.logo span { color: var(--brand); }
.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.9rem;
}
.nav a:hover { color: var(--brand); }
.nav-cta {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
}
.nav-cta:hover { background: var(--brand-dark); color: #fff; }

/* buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  transition: background 0.2s, color 0.2s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border: 1px solid var(--border); color: var(--text-sub); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-lg { padding: 16px 48px; font-size: 1.05rem; }

/* hero */
.hero {
  background: linear-gradient(180deg, #f4f7f9 0%, #ffffff 100%);
  padding: 96px 0 88px;
  text-align: center;
}
.hero-quote {
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(1.9rem, 5vw, 3rem);
  letter-spacing: 0.01em;
}
.hero-lead {
  margin: 28px auto 40px;
  max-width: 640px;
  color: var(--text-sub);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* worries */
.worries {
  padding: 80px 0;
  text-align: center;
}
.worries h2 { font-size: 1.5rem; }
.bubbles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 32px 0;
}
.bubbles li {
  padding: 10px 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-alt);
  font-size: 0.95rem;
}
.worries-note { color: var(--text-sub); }

/* sections */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }
.section-label {
  color: var(--brand);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.section h2 {
  font-size: 1.75rem;
  margin: 8px 0 40px;
}

/* feature cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}
.card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}
.card p {
  color: var(--text-sub);
  font-size: 0.92rem;
}
.features-more {
  margin-top: 32px;
  color: var(--text-sub);
  font-size: 0.9rem;
}

/* checks */
.checks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px 32px;
}
.checks li {
  padding-left: 32px;
  position: relative;
}
.checks li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 14px;
  height: 7px;
  border-left: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
}

/* steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.steps li {
  padding: 28px 24px;
  border-top: 3px solid var(--brand);
  background: var(--bg-alt);
  border-radius: 0 0 var(--radius) var(--radius);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.steps h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}
.steps p {
  color: var(--text-sub);
  font-size: 0.92rem;
}

/* cta */
.cta {
  padding: 88px 0;
  background: var(--brand);
  color: #fff;
  text-align: center;
}
.cta h2 { font-size: 1.75rem; }
.cta p { margin: 16px 0 32px; opacity: 0.9; }
.cta .btn-primary { background: #fff; color: var(--brand); }
.cta .btn-primary:hover { background: #e9f3f1; }

/* footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.copy {
  color: var(--text-sub);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .nav { gap: 14px; font-size: 0.82rem; }
  .nav a:not(.nav-cta) { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .btn { width: 100%; text-align: center; }
  .hero-actions { flex-direction: column; }
}