.official-document-announcement {
  width: min(620px, calc(100vw - 32px));
  max-width: 620px;
  max-height: min(82dvh, 760px);
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 1px solid rgba(212, 226, 235, .92);
  border-radius: 24px;
  color: #102b3c;
  background: rgba(250, 253, 255, .92);
  box-shadow: 0 32px 90px rgba(3, 31, 48, .28), inset 0 1px rgba(255, 255, 255, .92);
  backdrop-filter: blur(26px) saturate(1.35);
  -webkit-backdrop-filter: blur(26px) saturate(1.35);
}
.official-document-announcement::backdrop {
  background: rgba(7, 26, 38, .42);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.official-document-announcement-shell { padding: clamp(22px, 5vw, 34px); }
.official-document-announcement-header { display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; }
.official-document-announcement-kicker { margin: 0 0 10px; color: #007db9; font-size: 10px; font-weight: 850; letter-spacing: .15em; }
.official-document-announcement-header h2 { max-width: 470px; margin: 0; color: #0b2536; font: 760 clamp(25px, 5vw, 34px)/1.08 "Segoe UI Variable", "Segoe UI", sans-serif; letter-spacing: -.045em; }
.official-document-announcement-intro { max-width: 470px; margin: 10px 0 0; color: #577082; font-size: 14px; line-height: 1.55; }
.official-document-announcement-close { flex: 0 0 40px; width: 40px; height: 40px; border: 1px solid rgba(10, 54, 76, .12); border-radius: 50%; color: #26495d; background: rgba(255,255,255,.62); font-size: 25px; line-height: 1; cursor: pointer; }
.official-document-announcement-list { display: grid; gap: 10px; margin-top: 24px; }
.official-document-announcement-item { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 17px 18px; border: 1px solid rgba(37, 102, 136, .14); border-radius: 16px; background: rgba(255,255,255,.56); }
.official-document-announcement-item h3 { margin: 0; color: #102b3c; font-size: 15px; line-height: 1.4; }
.official-document-announcement-item p { margin: 5px 0 0; color: #5a7384; font-size: 12px; line-height: 1.5; }
.official-document-announcement-link { flex: 0 0 auto; min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 0 15px; border-radius: 12px; color: #fff; background: #087fc8; font-size: 12px; font-weight: 750; text-decoration: none; }
.official-document-announcement-link:hover { background: #0069aa; }
.official-document-announcement-shell>footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 22px; }
.official-document-announcement-archive { color: #007db9; font-size: 13px; font-weight: 750; text-decoration: none; }
.official-document-announcement-done { min-height: 42px; padding: 0 18px; border: 1px solid rgba(10, 54, 76, .14); border-radius: 12px; color: #18384b; background: rgba(255,255,255,.6); font-size: 13px; font-weight: 700; cursor: pointer; }
.official-document-announcement :focus-visible { outline: 3px solid rgba(0, 125, 185, .5); outline-offset: 3px; }
@media (max-width: 600px) {
  .official-document-announcement { width: calc(100vw - 24px); max-height: 88dvh; border-radius: 20px; }
  .official-document-announcement-shell { padding: 21px 18px; }
  .official-document-announcement-item { align-items: stretch; flex-direction: column; gap: 13px; padding: 15px; }
  .official-document-announcement-link { align-self: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .official-document-announcement { scroll-behavior: auto; }
}