/* ============================================================
   About JK — Mega Menu（点击展开的全宽面板，仿参考 aboutus下拉框.html）
   ============================================================ */

/* 触发器：让菜单项文字与箭头横向排列 */
.jk-about-trigger { position: relative; }
.jk-about-trigger > a,
.jk-about-trigger .menu-link {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

/* 去掉点击/聚焦后浏览器的默认黑框轮廓 */
.jk-about-trigger > a:focus,
.jk-about-trigger > a:focus-visible,
.jk-about-trigger > a:active {
  outline: none !important;
  box-shadow: none !important;
}

/* 下拉箭头（SVG chevron：默认朝下，展开时平滑旋转 180° 朝上） */
.jk-about-arrow {
  display: inline-flex;
  align-items: center;
  margin-left: 6px;
  transform: rotate(0deg);
  transform-origin: center;
  transition: transform .5s cubic-bezier(.45, .05, .25, 1);
}
.jk-about-arrow svg {
  width: 13px;
  height: 13px;
  display: block;
}
.jk-about-trigger > a.active .jk-about-arrow {
  transform: rotate(180deg);
}
.jk-about-trigger > a.active,
.jk-about-trigger.active > a {
  color: #e8503a;
}

/* Products 触发器：复用同一套箭头旋转与激活样式 */
.jk-products-trigger > a.active .jk-about-arrow {
  transform: rotate(180deg);
}
.jk-products-trigger > a.active,
.jk-products-trigger.active > a {
  color: #e8503a;
}
.jk-products-trigger > a:focus,
.jk-products-trigger > a:focus-visible,
.jk-products-trigger > a:active {
  outline: none !important;
  box-shadow: none !important;
}

/* 全宽下拉面板 */
.jk-about-mega {
  position: fixed;
  left: 0;
  right: 0;
  top: 72px; /* 由 JS 按导航栏实际高度修正 */
  background: #fff;
  border-bottom: 1px solid #eee;
  box-shadow: 0 12px 32px rgba(15, 23, 42, .10);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity .3s, transform .3s, visibility .3s;
  padding: 28px 48px 40px;
  z-index: 999;
}
.jk-about-mega.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.jk-about-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* 面板内卡片 */
.jk-about-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: 8px;
  padding: 16px;
  transition: background-color .25s, transform .2s;
}
.jk-about-card:hover { background: #f5f5f5; }
.jk-about-card:active { transform: scale(.996); }
.jk-about-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 10px;
  color: #111;
}
.jk-about-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 160px;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 12px;
  background: #e9ecef;
}
.jk-about-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.jk-about-thumb--product {
  aspect-ratio: 16 / 9;
  max-height: 160px;
  background: #f8f9fa;
}
.jk-about-thumb--product img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
/* 缩略图占位：可替换为真实图片 background-image */
.jk-about-thumb--1 { background: linear-gradient(135deg, #ffd9d4, #ffb3a7); }
.jk-about-thumb--2 { background: linear-gradient(135deg, #cfe9ff, #a9d4ff); }
.jk-about-thumb--3 { background: linear-gradient(135deg, #d4edda, #b6e0c4); }
.jk-about-card p {
  font-size: 14px;
  color: #666;
  line-height: 1.55;
  margin: 0;
}

/* 点击外部关闭的遮罩层 */
.jk-about-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .18);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
  z-index: 998;
}
.jk-about-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* 移动端：单列堆叠 */
@media (max-width: 768px) {
  .jk-about-inner { grid-template-columns: 1fr; gap: 12px; }
  .jk-about-mega { padding: 16px 18px; }
  .jk-about-card { padding: 10px; }
}