/* Mega Menu — 兩行 Header：上排 Logo + WhatsApp，下排選單 */
.site-header .header-inner--split {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.7rem;
  padding: 0.65rem 0 0.8rem;
  min-height: 0;
  transition: gap var(--transition), padding var(--transition);
}

.site-header.is-scrolled .header-inner--split {
  gap: 0.35rem;
  padding: 0.35rem 0 0.55rem;
}

.site-header .header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
}

.site-header .header-nav-row {
  width: 100%;
  position: relative;
}

.site-header .header-nav-row .mega-nav {
  width: 100%;
  justify-content: center;
}

.main-nav.mega-nav-wrap {
  position: relative;
}

.mega-nav {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.2rem 0.1rem;
  margin: 0;
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}

.mega-nav > li {
  position: relative;
}

.mega-nav > li > a,
.mega-nav > li > button.mega-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.72rem 1rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-soft);
  font-size: 0.94rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition), background var(--transition);
}

.mega-nav > li > a:hover,
.mega-nav > li > button.mega-trigger:hover,
.mega-nav > li > a[aria-current="page"],
.mega-nav > li.is-open > button.mega-trigger {
  color: var(--color-heading);
  background: rgba(124, 58, 237, 0.1);
}

.mega-trigger-icon {
  font-size: 0.72rem;
  opacity: 0.7;
}

/* 主選單與子選單之間的隱形橋接，避免 hover 時子選單消失 */
.mega-nav > li.has-children::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.65rem;
  z-index: 59;
}

.mega-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 240px;
  padding: 0.65rem 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 60;
}

.mega-panel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -0.55rem;
  height: 0.55rem;
}

.mega-nav > li.has-children:hover .mega-panel,
.mega-nav > li.has-children.is-open .mega-panel,
.mega-nav > li.has-children:focus-within .mega-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mega-panel a {
  display: block;
  padding: 0.72rem 1rem;
  border-radius: 10px;
  color: var(--color-text-soft);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.35;
}

.mega-panel a:hover {
  background: rgba(124, 58, 237, 0.08);
  color: var(--color-heading);
}

.mega-panel-title {
  display: block;
  padding: 0.5rem 1rem 0.35rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* 手機版 Mega */
.mobile-mega-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0 1.25rem;
}

.mobile-mega-group {
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.mobile-mega-group summary {
  padding: 0.85rem 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.mobile-mega-group summary::-webkit-details-marker {
  display: none;
}

.mobile-mega-links {
  padding: 0 0.65rem 0.75rem;
}

.mobile-mega-links a {
  display: block;
  padding: 0.45rem 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
  font-weight: 600;
}

.mobile-mega-links a[aria-current="page"] {
  color: var(--color-accent);
}

.mobile-mega-top {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

.mobile-mega-top a {
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--color-border);
  font-weight: 700;
}

@media (max-width: 1100px) {
  .site-header .header-nav-row {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-header .header-inner--split {
    gap: 0;
    padding-bottom: 0.5rem;
  }

  .mobile-nav {
    display: block;
    max-height: 0;
    overflow: hidden;
    transition: max-height 280ms ease;
    border-top: 1px solid transparent;
  }

  .mobile-nav.is-open {
    max-height: min(85vh, 820px);
    overflow-y: auto;
    border-top-color: var(--color-border);
    -webkit-overflow-scrolling: touch;
  }
}

@media (min-width: 1101px) {
  .mobile-nav {
    display: none !important;
  }
}

/* 聯絡頁 */
.contact-page-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}

.contact-form-panel {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact-form-grid {
  display: grid;
  gap: 1rem;
}

.contact-form-grid label {
  display: grid;
  gap: 0.4rem;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-heading);
}

.contact-form-grid input,
.contact-form-grid select,
.contact-form-grid textarea {
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: #fff;
}

.contact-form-grid textarea {
  min-height: 140px;
  resize: vertical;
}

.map-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  min-height: 320px;
}

.map-frame iframe {
  width: 100%;
  height: 360px;
  display: block;
}

@media (max-width: 900px) {
  .contact-page-layout {
    grid-template-columns: 1fr;
  }
}