.sticky-registration {
  position: fixed;
  z-index: 80;
  right: clamp(24px, 3.5vw, 56px);
  bottom: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 50px;
  padding: 0 19px 0 23px;
  border: 1px solid rgba(255, 255, 255, .42);
  border-radius: 999px;
  background: #164d43;
  box-shadow: 0 8px 26px rgba(19, 52, 45, .18), 0 2px 7px rgba(19, 52, 45, .12);
  color: #fffdf7;
  font-family: "Noto Sans TC", sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .09em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 220ms ease, transform 220ms ease, visibility 220ms ease, background 180ms ease;
}

.sticky-registration.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.sticky-registration:hover,
.sticky-registration:focus-visible {
  background: #0f3c34;
}

.sticky-registration:focus-visible {
  outline: 2px solid #d8b87c;
  outline-offset: 3px;
}

.sticky-registration svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 900px) {
  .sticky-registration { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sticky-registration { transition: none; }
}