:root {
  --blue: #2f74bd;
  --blue-deep: #155ea8;
  --blue-soft: #eaf4ff;
  --sky: #d8eaff;
  --paper: #ffffff;
  --ink: #20252b;
  --muted: #697783;
  --line: rgba(47, 116, 189, 0.2);
  --shadow: 0 18px 48px rgba(51, 93, 132, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.95), transparent 24rem),
    radial-gradient(circle at 90% 8%, rgba(218, 236, 255, 0.78), transparent 28rem),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 42%, #eef7ff 100%);
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.85;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1180px, calc(100% - 24px));
  margin: 0 auto;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-top: 0;
  border-radius: 0 0 20px 20px;
  box-shadow: 0 12px 28px rgba(51, 93, 132, 0.1);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--blue-deep);
  font-family: "Noto Serif JP", serif;
  font-size: clamp(18px, 3vw, 27px);
  font-weight: 600;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #fff;
  background: var(--blue);
  border-radius: 50%;
  font-family: sans-serif;
  font-size: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.nav a {
  transition: color 0.18s ease, transform 0.18s ease;
}

.nav a:hover {
  color: var(--blue-deep);
  transform: translateY(-1px);
}

.nav-cta,
.primary-cta,
.floating {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  border-radius: 999px;
  box-shadow: 0 12px 24px rgba(47, 116, 189, 0.24);
}

.nav-cta {
  padding: 8px 16px;
}

main {
  width: min(1180px, 100%);
  margin: -1px auto 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(340px, 0.72fr) 1fr;
  align-items: center;
  gap: clamp(20px, 4vw, 48px);
  padding: clamp(16px, 3vw, 34px);
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.94), rgba(234, 244, 255, 0.75)),
    var(--paper);
  border-radius: 0 0 32px 32px;
  box-shadow: var(--shadow);
}

.hero-image {
  overflow: hidden;
  border-radius: 24px;
  box-shadow: 0 18px 40px rgba(51, 93, 132, 0.12);
}

.hero-copy {
  max-width: 580px;
}

.eyebrow,
.section-label {
  margin: 0 0 12px;
  color: var(--blue);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
.copy-section h2,
.symptom-guide h2,
.message-card h2 {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Serif JP", serif;
  font-weight: 500;
  line-height: 1.35;
}

h1 {
  font-size: clamp(34px, 5.4vw, 72px);
}

.hero-copy p:not(.eyebrow),
.copy-section p,
.symptom-guide li,
.message-card p {
  color: var(--muted);
  font-size: clamp(15px, 2vw, 18px);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.primary-cta,
.secondary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 10px 24px;
  font-weight: 800;
}

.secondary-cta {
  color: var(--blue-deep);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 12px 24px rgba(51, 93, 132, 0.08);
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  width: min(1040px, calc(100% - 28px));
  margin: clamp(16px, 3vw, 30px) auto 0;
}

.trust-row article {
  padding: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.trust-row span {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 10px;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 50%;
  font-weight: 900;
}

.trust-row h2 {
  margin: 0 0 8px;
  color: var(--blue-deep);
  font-family: "Noto Serif JP", serif;
  font-size: 24px;
}

.trust-row p {
  margin: 0;
  color: var(--muted);
}

.poster,
.copy-section,
.symptom-guide,
.message-card {
  margin-top: clamp(18px, 3vw, 34px);
}

.poster {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.copy-section,
.symptom-guide,
.message-card {
  width: min(1040px, calc(100% - 28px));
  margin-right: auto;
  margin-left: auto;
  padding: clamp(28px, 5vw, 58px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(237, 247, 255, 0.88)),
    #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.copy-section h2,
.symptom-guide h2,
.message-card h2 {
  font-size: clamp(28px, 4.8vw, 52px);
}

.copy-section p,
.message-card p {
  max-width: 760px;
}

.symptom-guide {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(20px, 4vw, 44px);
  align-items: center;
}

.symptom-guide ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.symptom-guide li {
  position: relative;
  padding: 14px 16px 14px 44px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.symptom-guide li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 14px;
  color: var(--blue);
  font-weight: 900;
}

.message-card .primary-cta {
  margin-top: 22px;
}

.footer {
  width: min(1180px, 100%);
  margin: clamp(18px, 3vw, 34px) auto 0;
  padding: 42px 24px 32px;
  color: #fff;
  text-align: center;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
}

.footer-logo {
  margin: 0 0 8px;
  font-family: "Noto Serif JP", serif;
  font-size: 28px;
  font-weight: 600;
}

.footer p {
  margin: 0 0 12px;
}

.footer small {
  color: rgba(255, 255, 255, 0.72);
}

.floating {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 900;
}

@media (max-width: 900px) {
  .site-header {
    width: 100%;
    border-radius: 0;
    padding: 10px 12px;
  }

  .nav a:not(.nav-cta) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    border-radius: 0 0 24px 24px;
  }

  .hero-image {
    max-width: 620px;
    margin: 0 auto;
  }

  .hero-copy {
    text-align: center;
    margin: 0 auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .trust-row,
  .symptom-guide {
    grid-template-columns: 1fr;
  }

  .poster {
    width: calc(100% - 14px);
    margin-right: auto;
    margin-left: auto;
    border-radius: 18px;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 17px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .nav-cta {
    padding: 7px 12px;
    font-size: 12px;
  }

  .hero,
  .copy-section,
  .symptom-guide,
  .message-card {
    padding: 24px 18px;
  }

  .trust-row {
    width: calc(100% - 20px);
  }

  .hero-actions {
    display: grid;
  }

  .primary-cta,
  .secondary-cta {
    width: 100%;
  }

  .floating {
    right: 10px;
    bottom: 10px;
    min-height: 44px;
    padding: 8px 14px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .nav a {
    transition: none;
  }
}