/* ===== Destinations Mega Menu (G Adventures 风格) ===== */
.header-main .main-menu ul li.has-megamenu {
  position: static;
}

.header-main .main-menu ul li .mega-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  width: 100%;
  background: #fff;
  box-shadow: rgba(99, 99, 99, 0.2) 0px 8px 24px 0px;
  border-top: 3px solid var(--theme);
  visibility: hidden;
  opacity: 0;
  transform: translateY(-10px);
  transform-origin: top center;
  transition: all 0.3s ease-in-out;
  z-index: 99999;
}

.header-main .main-menu ul li:hover > .mega-menu {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.mega-menu-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  padding: 0;
}

/* 左侧大区列表 */
.mega-regions {
  width: 220px;
  flex-shrink: 0;
  background: #f7f7f7;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
}

.mega-region-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #333;
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.mega-region-btn:hover {
  color: var(--theme);
  background: #fff;
}

.mega-region-btn.active {
  color: var(--theme);
  background: #fff;
  border-left: 3px solid var(--theme);
}

/* 右侧目的地面板 */
.mega-destinations {
  flex: 1;
  padding: 20px 28px;
  min-height: 320px;
}

.mega-panel {
  display: none;
}

.mega-panel.active {
  display: block;
}

.mega-panel-desc {
  font-size: 14px;
  color: #888;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid #eee;
}

.mega-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px 20px;
}

.mega-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  color: #444;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 6px;
  transition: all 0.2s;
}

.mega-links a:hover {
  background: #f5f5f5;
  color: var(--theme);
}

.mega-links a em {
  font-style: normal;
  font-size: 11px;
  color: #999;
  background: #f0f0f0;
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

/* 小目录分组标题（如 Coming Soon） */
.mega-links .mega-group-title {
  grid-column: 1 / -1;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed #ddd;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #bbb;
}

/* 响应式：移动端降级为普通下拉 */
@media (max-width: 1199px) {
  .header-main .main-menu ul li.has-megamenu {
    position: relative;
  }
  .header-main .main-menu ul li .mega-menu {
    position: absolute;
    left: 0;
    right: auto;
    width: auto;
    min-width: 260px;
  }
  .mega-menu-inner {
    flex-direction: column;
  }
  .mega-regions {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 8px;
  }
  .mega-region-btn {
    width: auto;
    padding: 8px 14px;
    border-left: none;
    border-bottom: 2px solid transparent;
  }
  .mega-region-btn.active {
    border-left: none;
    border-bottom: 2px solid var(--theme);
  }
  .mega-destinations {
    padding: 16px;
  }
  .mega-links {
    grid-template-columns: repeat(2, 1fr);
  }
}