/* ===========================================
   SHARED SITE HEADER
   =========================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(74, 26, 120, 0.15);
  box-shadow: 0 1px 20px rgba(74, 26, 120, 0.06);
  display: flex;
  align-items: center;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
  font-family: "Space Grotesk", "Noto Sans TC", sans-serif;
}

/* ── Logo ── */
.site-header .site-logo {
  display: flex;
  align-items: center;
  gap: 0.6em;
  text-decoration: none;
  color: #4A1A78;
}
.site-header .site-logo img {
  height: 40px;
  width: auto;
  max-height: 40px;
  object-fit: contain;
}
.site-header .logo-text {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #4A1A78;
}
.site-header .logo-text span {
  color: #D9A300;
}

/* ── Navigation ── */
.site-header nav.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2.5vw, 2rem);
}
.site-header nav.site-nav a {
  color: rgba(26, 10, 46, 0.78);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: color 0.2s;
  white-space: nowrap;
}
.site-header nav.site-nav a:hover {
  color: #4A1A78;
}
.site-header nav.site-nav a.cta {
  background: #F5B800;
  color: #1a1a1a;
  padding: 0.5em 1.1em;
  border-radius: 6px;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(245, 184, 0, 0.3);
}
.site-header nav.site-nav a.cta:hover {
  background: #FFC721;
  color: #1a1a1a;
}

/* ── Dropdown ── */
.site-header nav.site-nav .dropdown {
  position: relative;
  display: inline-block;
}
.site-header nav.site-nav .dropdown > a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.site-header nav.site-nav .dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(74, 26, 120, 0.15);
  border-radius: 8px;
  padding: 0.4em 0;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 1001;
  box-shadow: 0 10px 30px rgba(74, 26, 120, 0.15);
}
.site-header nav.site-nav .dropdown:hover .dropdown-menu,
.site-header nav.site-nav .dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.site-header nav.site-nav .dropdown-menu a {
  display: block;
  padding: 0.6em 1.2em;
  color: rgba(26, 10, 46, 0.82);
  font-size: 0.88rem;
  white-space: nowrap;
  text-align: center;
}
.site-header nav.site-nav .dropdown-menu a:hover {
  color: #4A1A78;
  background: rgba(74, 26, 120, 0.08);
}

/* ── Mobile hamburger toggle ── */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(74, 26, 120, 0.18);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.mobile-menu-toggle:hover {
  background: rgba(74, 26, 120, 0.06);
  border-color: rgba(74, 26, 120, 0.3);
}
.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: #4A1A78;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile slide-down menu panel ── */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(74, 26, 120, 0.15);
  box-shadow: 0 10px 30px rgba(74, 26, 120, 0.12);
  padding: 8px 0;
  transform: translateY(-110%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.25s ease, visibility 0.3s;
  font-family: "Space Grotesk", "Noto Sans TC", sans-serif;
}
.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}
.mobile-menu a {
  display: flex;
  align-items: center;
  padding: 14px 24px;
  color: rgba(26, 10, 46, 0.82);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-bottom: 1px solid rgba(74, 26, 120, 0.06);
  transition: color 0.2s, background 0.2s, padding-left 0.2s;
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover,
.mobile-menu a:focus {
  color: #4A1A78;
  background: rgba(74, 26, 120, 0.06);
  padding-left: 28px;
}
.mobile-menu .menu-section-label {
  padding: 10px 24px 4px;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(74, 26, 120, 0.5);
  font-weight: 600;
}
.mobile-menu .sub-item {
  padding-left: 40px;
  font-size: 0.9rem;
}
.mobile-menu .sub-item:hover,
.mobile-menu .sub-item:focus {
  padding-left: 44px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .site-header nav.site-nav a:not(.cta) { display: none; }
  .site-header nav.site-nav .dropdown { display: none; }
  .site-header .logo-text { display: none; }
  .mobile-menu-toggle { display: flex; }
}
@media (max-width: 480px) {
  .site-header { padding: 0 1rem; height: 56px; }
  .site-header .site-logo img { height: 32px; }
  .site-header nav.site-nav { gap: 0.6rem; }
  .site-header nav.site-nav a.cta { padding: 0.45em 0.9em; font-size: 0.85rem; }
  .mobile-menu-toggle { width: 36px; height: 36px; }
  .mobile-menu { top: 56px; }
  .mobile-menu a { padding: 13px 20px; font-size: 0.92rem; }
  .mobile-menu .menu-section-label { padding: 10px 20px 4px; }
  .mobile-menu .sub-item { padding-left: 36px; }
  html { scroll-padding-top: 56px; }
}