:root {
  --ink: #172033;
  --muted: #5f6f85;
  --navy: #173f69;
  --navy-dark: #0d2947;
  --teal: #13776f;
  --green: #326f52;
  --line: #d9e1ea;
  --soft: #f4f7fa;
  --soft-blue: #eef5f8;
  --white: #ffffff;
  --shadow: 0 18px 44px rgba(23, 63, 105, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Yu Gothic", "YuGothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.96);
  border-top: 8px solid var(--navy);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--teal);
}

.brand {
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 22px;
  color: var(--muted);
  font-size: 14px;
}

.header-nav a {
  text-decoration: none;
}

.header-nav a:hover {
  color: var(--navy);
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 82px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.86fr);
  align-items: center;
  gap: clamp(36px, 5vw, 64px);
  min-height: 690px;
  padding-top: 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(42px, 5.5vw, 72px);
  font-weight: 850;
  line-height: 1.12;
}

h2 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(30px, 3.1vw, 44px);
  font-weight: 850;
  line-height: 1.24;
}

h3 {
  margin: 10px 0 12px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.35;
}

.lead {
  margin: 26px 0 0;
  color: var(--ink);
  font-size: clamp(22px, 2.1vw, 30px);
  font-weight: 800;
  line-height: 1.55;
}

.summary {
  max-width: 690px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

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

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

.button.ghost {
  color: var(--green);
  background: var(--white);
  border-color: rgba(50, 111, 82, 0.45);
}

.button.large {
  width: min(100%, 620px);
}

.hero-visual {
  margin: 0;
  padding: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  border-radius: 4px;
}

.section-head {
  max-width: 880px;
  margin-bottom: 34px;
}

.section-head p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.cards {
  display: grid;
  gap: 20px;
}

.cards.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  min-height: 220px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(23, 63, 105, 0.07);
}

.card-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 28px;
  color: var(--white);
  background: var(--navy);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 800;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.note-text {
  margin: 26px 0 0;
  padding: 18px 22px;
  color: var(--ink);
  background: var(--soft-blue);
  border-left: 5px solid var(--teal);
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.84fr) minmax(0, 1.16fr);
  gap: clamp(36px, 6vw, 76px);
  border-top: 1px solid var(--line);
}

.text-block p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 17px;
}

.text-block p:last-child {
  margin-bottom: 0;
}

.slides-section {
  width: min(1180px, calc(100% - 40px));
  border-top: 1px solid var(--line);
}

.slide-list {
  display: grid;
  gap: 34px;
}

.slide-card {
  margin: 0;
}

.slide-card figcaption {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--navy-dark);
  font-size: 18px;
  font-weight: 800;
}

.slide-card figcaption span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 32px;
  color: var(--white);
  background: var(--teal);
  border-radius: 4px;
  font-size: 13px;
}

.slide-card a {
  display: block;
  padding: clamp(8px, 1.4vw, 14px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 40px rgba(23, 63, 105, 0.10);
}

.slide-card img {
  width: 100%;
  border-radius: 4px;
}

.pdf-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 48px clamp(20px, 4vw, 44px);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.pdf-copy p:not(.eyebrow) {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.pdf-copy .file-meta {
  color: var(--navy);
  font-weight: 800;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.related-links a {
  display: flex;
  align-items: center;
  min-height: 96px;
  padding: 22px;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(23, 63, 105, 0.07);
}

.related-links a:hover {
  color: var(--teal);
  box-shadow: var(--shadow);
}

.notice-section {
  padding-top: 20px;
}

.notice-section p {
  margin: 0;
  padding: 20px 24px;
  color: var(--muted);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.site-footer a {
  color: var(--navy);
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 1060px) {
  .hero,
  .split,
  .pdf-section {
    grid-template-columns: 1fr;
  }

  .cards.four,
  .related-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pdf-section .button {
    justify-self: start;
  }
}

@media (max-width: 700px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 20px;
  }

  .header-nav {
    justify-content: flex-start;
    gap: 10px 16px;
    font-size: 13px;
  }

  .section,
  .slides-section {
    width: min(100% - 28px, 1120px);
    padding: 58px 0;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

  h3 {
    font-size: 20px;
  }

  .lead {
    font-size: 20px;
  }

  .summary,
  .section-head p:not(.eyebrow),
  .text-block p,
  .pdf-copy p:not(.eyebrow) {
    font-size: 16px;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .cards.four,
  .related-links {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
  }

  .slide-list {
    gap: 26px;
  }

  .slide-card figcaption {
    align-items: flex-start;
    font-size: 16px;
    line-height: 1.45;
  }

  .slide-card a {
    margin-left: -8px;
    margin-right: -8px;
    border-radius: 6px;
  }

  .pdf-section {
    width: min(100% - 28px, 1120px);
    padding: 34px 20px;
  }

  .site-footer {
    flex-direction: column;
  }
}