:root {
  --ink: #172636;
  --text: #2f3b49;
  --muted: #687586;
  --line: #d7e0e8;
  --soft: #f4f7fa;
  --soft-blue: #e9f1f7;
  --navy: #143a5a;
  --blue: #23618c;
  --blue-dark: #0f334f;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(20, 58, 90, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: "Yu Gothic", "Meiryo", "Hiragino Sans", system-ui, sans-serif;
  line-height: 1.8;
}

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

a {
  color: var(--blue);
}

.wrap {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.narrow {
  max-width: 880px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.header-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 18px;
  color: var(--white);
  background: var(--navy);
  border: 1px solid var(--navy);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
}

.hero {
  padding: 72px 0 64px;
  background:
    linear-gradient(180deg, #f7fafc 0%, #ffffff 78%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(600px, 1fr) minmax(380px, 0.72fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-weight: 800;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  line-height: 1.35;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.8rem);
}

h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  margin-bottom: 22px;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

p {
  margin: 0 0 18px;
}

.subtitle {
  margin: 16px 0 18px;
  color: var(--navy);
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  font-weight: 800;
  line-height: 1.6;
}

.hero-text {
  max-width: 680px;
  font-size: 1.05rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 13px 22px;
  border-radius: 6px;
  border: 1px solid var(--navy);
  text-decoration: none;
  font-weight: 800;
  line-height: 1.35;
}

.button.primary {
  color: var(--white);
  background: var(--navy);
  box-shadow: 0 12px 24px rgba(20, 58, 90, 0.2);
}

.button.secondary {
  color: var(--navy);
  background: var(--white);
}

.button.large {
  width: min(100%, 720px);
  min-height: 60px;
  font-size: 1.05rem;
}

.button:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 3px;
}

.button:hover,
.header-download:hover {
  filter: brightness(1.08);
}

.file-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-figure,
.image-grid figure {
  margin: 0;
}

.hero-figure {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.hero-figure img,
.image-grid img {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--white);
}

figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.section {
  padding: 72px 0;
}

.section.soft {
  background: var(--soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts,
.feature-grid,
.image-grid {
  display: grid;
  gap: 18px;
}

.facts {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.facts div,
.feature-grid article {
  min-height: 132px;
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.facts span {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 800;
}

.facts strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.55;
}

.notice {
  margin: 24px 0 0;
  padding: 18px 20px;
  color: var(--ink);
  background: var(--soft-blue);
  border-left: 5px solid var(--blue);
  border-radius: 6px;
  font-weight: 700;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid article {
  min-height: 178px;
}

.feature-grid p {
  margin-bottom: 0;
}

.images {
  background: #fbfcfd;
}

.image-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.image-grid figure {
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.cta {
  background: var(--navy);
  color: var(--white);
}

.cta h2 {
  color: var(--white);
}

.cta p {
  color: #e7eef5;
}

.cta-box {
  max-width: 920px;
}

.cta .button.primary {
  color: var(--navy);
  background: var(--white);
  border-color: var(--white);
  box-shadow: none;
}

.caution-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.caution-list li {
  position: relative;
  padding-left: 20px;
}

.caution-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 7px;
  height: 7px;
  background: var(--blue);
  border-radius: 50%;
}

.bottom-buttons {
  margin-top: 34px;
}

.site-footer {
  padding: 34px 0;
  background: var(--blue-dark);
  color: #dbe7f1;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.footer-inner p {
  margin: 0;
  font-size: 0.9rem;
}

@media (min-width: 1440px) {
  .wrap {
    width: min(1180px, calc(100% - 80px));
  }
}

@media (min-width: 901px) {
  .hero h1 {
    white-space: nowrap;
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .facts,
  .feature-grid,
  .image-grid,
  .caution-list {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 32px;
  }

  .hero {
    padding-top: 52px;
  }

  .section {
    padding: 56px 0;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    min-height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .brand {
    font-size: 0.95rem;
  }

  .header-download {
    width: 100%;
  }

  .button-row {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero {
    padding: 42px 0 48px;
  }

  h1 {
    font-size: 2.35rem;
  }

  .subtitle {
    font-size: 1.2rem;
  }

  .facts div,
  .feature-grid article {
    min-height: auto;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}