.supple-main {
  width: min(1180px, calc(100% - 32px));
}

.page-back-home {
  margin: 0 0 14px;
}

.page-back-home a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  background: #ffffff;
  color: #123053;
  font-weight: 800;
}

.page-back-home a:hover,
.page-back-home a:focus-visible {
  color: #123053;
  text-decoration: none;
}

.supple-intro-body,
.policy-body {
  line-height: 1.85;
}

.supple-intro-body > :first-child,
.policy-body > :first-child {
  margin-top: 0;
}

.supple-intro-body > :last-child,
.policy-body > :last-child {
  margin-bottom: 0;
}

.supple-lead {
  color: var(--text);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  font-weight: 800;
}

.policy-update {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.88rem;
}

.policy-nav,
.policy-section {
  margin-top: 20px;
}

.policy-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.policy-nav-grid a {
  display: flex;
  align-items: center;
  min-height: 50px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f6f8fb;
  color: #123053;
  font-weight: 800;
}

.policy-nav-grid a::after {
  margin-left: auto;
  color: var(--blue);
  content: "↓";
}

.policy-nav-grid a:hover,
.policy-nav-grid a:focus-visible {
  border-color: var(--green);
  color: var(--green);
  text-decoration: none;
}

.policy-body h3 {
  margin: 26px 0 10px;
  color: var(--text);
  font-size: 1.08rem;
}

.policy-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 22px 0;
}

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

.policy-points section {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f6f8fb;
}

.policy-points h3 {
  margin: 0 0 8px;
}

.policy-points p,
.policy-points ul {
  margin-top: 0;
  margin-bottom: 0;
}

.policy-list {
  margin: 12px 0 0;
  padding-left: 1.35em;
}

.policy-list li + li {
  margin-top: 7px;
}

.policy-note {
  margin-top: 22px;
  padding: 14px 16px;
  border-left: 4px solid var(--green);
  border-radius: 0 8px 8px 0;
  background: #f1f8f5;
}

.transmission-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.transmission-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f6f8fb;
}

.transmission-card h3 {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--green);
  color: #123053;
  font-size: 1.06rem;
}

.transmission-card dl,
.transmission-card dd {
  margin: 0;
}

.transmission-card dt {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.transmission-card dt:first-child {
  margin-top: 0;
}

.transmission-card dd {
  margin-top: 2px;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 58px;
  min-height: 50px;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  background: var(--blue);
  box-shadow: 0 8px 24px rgba(23, 32, 51, 0.28);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--green);
  color: #ffffff;
  text-decoration: none;
}

@media (max-width: 900px) {
  .policy-points-three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .supple-main {
    width: min(100% - 22px, 1180px);
  }

  .page-back-home a {
    width: 100%;
  }

  .policy-nav-grid,
  .policy-points,
  .transmission-list {
    grid-template-columns: 1fr;
  }

  .policy-nav-grid a {
    min-height: 46px;
  }

  .policy-points section,
  .transmission-card {
    padding: 16px;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
    min-width: 54px;
    min-height: 46px;
    padding: 0 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: none;
  }
}