:root {
    --blue: #003b86;
    --deep: #00275d;
    --yellow: #f6c21a;
    --light: #f4f8fc;
    --border: #d5e2ef;
    --text: #14213d;
    --muted: #4e5d6c;
    --white: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.96);
  border-bottom: 3px solid var(--yellow);
}

.site-header__inner {
  width: min(1280px, calc(100% - 48px));
  min-height: 82px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 40px;
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex: 0 0 220px;
}

.site-header__logo img {
  max-height: 54px;
  object-fit: contain;
  object-position: left center;
}

.site-header__nav {
  margin-left: auto;
  display: flex;
  gap: 26px;
  align-items: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
  white-space: nowrap;
}

.intro__page-title {
  margin: 0;
  color: var(--deep);
  font-size: clamp(40px, 5.2vw, 64px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .02em;
}

.section-rule {
  width: 100%;
  height: 4px;
  margin: 20px 0 32px;
  background: var(--blue);
}

.ir-content h4.intro__title {
  margin: 0 0 10px;
  color: var(--deep);
  font-size: clamp(18px, 3vw, 18px);
  line-height: 1.35;
  font-weight: 800;
  border-bottom: 0;
}

.intro__lead {
  margin: 0 0 30px;
  color: var(--blue);
  font-size: clamp(21px, 2.2vw, 28px);
  font-weight: 700;
}

.intro__text {
  max-width: 1040px;
  font-size: 19px;
  font-weight: 500;
}

.intro__text p {
  margin: 0 0 14px;
}

.section {
  padding: 76px 0;
}

.section:nth-of-type(even) {
  background: linear-gradient(180deg, #fff 0%, #f7fbff 100%);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 30px;
}

.section-heading h2 {
  position: relative;
  margin: 0;
  padding-left: 20px;
  color: var(--deep);
  font-size: clamp(18px, 3vw, 18px);
  line-height: 1.35;
  font-weight: 800;
}

.section-heading h2::before {
  position: absolute;
  left: 0;
  top: 0em;
  width: 6px;
  height: 1.25em;
  background: var(--yellow);
  content: "";
}

.section-heading p,
.section-lead {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.business__grid,
.market__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.business-card,
.chart-card,
.strength-card,
.system-image {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(0, 48, 112, .06);
}

.business-card {
  overflow: hidden;
  padding: 0 28px 34px;
}

.business-card h3 {
  margin: 0 -28px 28px;
  padding: 16px 28px;
  color: #fff;
  background: var(--blue);
  font-size: 18px;
  line-height: 1.35;
  text-align: center;
  letter-spacing: .08em;
}

.business-card__images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.business-card__images img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  object-fit: cover;
}

.business-card p {
  margin: 0;
  font-weight: 600;
}

.system-image {
  margin: 28px 0 32px;
  padding: 24px;
}

.system-image img {
  display: block;
  width: 100%;
  height: auto;
}

.strength__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.strength-card {
  position: relative;
  padding: 32px 26px 30px;
  background: #f8fbfe;
  overflow: hidden;
}

.strength-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 8px;
  background: var(--yellow);
  content: "";
}

.strength-card h3 {
  margin: 0 0 18px;
  color: var(--deep);
  line-height: 1.4;
}

.strength-card p {
  margin: 0 0 12px;
  font-weight: 500;
}

.chart-card {
  padding: 30px 30px 24px;
}

.chart-card h3 {
  margin: 0;
  color: var(--deep);
  line-height: 1.4;
}

.chart-card__unit {
  margin: 2px 0 26px;
  color: var(--muted);
  font-size: 13px;
}

.bar-chart {
  height: 270px;
  padding: 40px 0 38px;
  display: grid;
  grid-template-columns: repeat(10, minmax(22px, 1fr));
  gap: 12px;
  align-items: end;
  border-bottom: 1px solid #bccbdd;
  background-image: linear-gradient(to top, #e7eef6 1px, transparent 1px);
  background-size: 100% 54px;
}

.bar {
  position: relative;
  height: var(--h);
  min-height: 24px;
  border-radius: 5px 5px 0 0;
  background: var(--blue);
}

.bar.is-current {
  background: var(--yellow);
}

.bar span {
  position: absolute;
  bottom: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  letter-spacing: -0.08em;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.bar em {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) rotate(-20deg);
  transform-origin: top center;
  color: var(--text);
  font-size: 11px;
  font-style: normal;
  white-space: nowrap;
}

.source {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.closing-message {
  margin-top: 44px;
  padding: 30px 38px;
  border: 1px solid #f2d987;
  border-radius: 14px;
  background: #fff9e8;
}

.closing-message p {
  margin: 0;
  color: var(--deep);
  font-weight: 700;
}

.site-footer {
  padding: 34px 0;
  background: var(--deep);
  color: #fff;
}

.site-footer__inner {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-footer__brand {
  font-size: 40px;
  font-weight: 800;
  font-style: italic;
}

.site-footer p {
  margin: 0;
  font-size: 14px;
}

.site-footer ul {
  margin: 0 0 0 auto;
  padding: 0;
  display: flex;
  gap: 22px;
  list-style: none;
  font-size: 13px;
}

@media (max-width: 960px) {
  .site-header__inner {
    min-height: auto;
    padding: 18px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .site-header__nav {
    width: 100%;
    gap: 16px;
    overflow-x: auto;
    font-size: 13px;
  }

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 8px;
  }

  .business__grid,
  .market__grid,
  .strength__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    display: block;
  }

  .site-footer ul {
    margin-top: 18px;
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .container,
  .site-header__inner {
    width: min(100% - 32px, 1200px);
  }

  .intro {
    padding: 42px 0 52px;
  }

  .section {
    padding: 56px 0;
  }

  .business-card__images {
    grid-template-columns: 1fr;
  }

  .system-image {
    padding: 14px;
    overflow-x: auto;
  }

  .system-image img {
    min-width: 760px;
  }

  .bar-chart {
    gap: 7px;
  }

  .bar span,
  .bar em {
    font-size: 10px;
  }

  .pc-only {
    display: none;
  }
}