/* 
 * 导航栏美化样式
 * 深色背景 + 居中菜单 + 现代化效果
 */

/* 导航栏主体样式 */
#menu {
  background: rgba(255, 255, 255, 0.82) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  min-height: 64px !important;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  transition: all 0.28s ease;
}

/* 菜单容器居中 */
#menu .nav {
  float: none !important;
  text-align: center;
}

/* 菜单项样式 */
#menu .nav > li {
  display: inline-block;
  float: none;
  margin-right: 0;
}



/* 菜单链接样式 */
#menu .nav > li > a {
  color: #333333 !important;
  font-weight: 500;
  height: 64px !important;
  line-height: 64px !important;
  padding: 0 24px !important;
  letter-spacing: 0.8px;
  transition: all 0.3s ease;
}

/* Sticky + glassmorphism */
@media (min-width: 992px) {
  #menu {
    position: sticky;
    top: 0;
    z-index: 1200;
  }

  body.menu-scrolled #menu {
    min-height: 54px !important;
    background: rgba(255, 255, 255, 0.78) !important;
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.08);
  }

  body.menu-scrolled #menu .nav > li > a {
    height: 54px !important;
    line-height: 54px !important;
    padding: 0 20px !important;
    font-size: 13px;
    letter-spacing: 0.7px;
  }
}

/* 菜单项悬停效果 */
#menu .nav > li:hover > a {
  background: rgba(17, 24, 39, 0.06) !important;
  color: #111827 !important;
}

/* 下拉菜单高级化 */
#menu .nav > li .dropdown-menu {
  background: #fff;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  border: none !important;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  padding: 10px 0;
  z-index: 1000;
}

#menu .nav > li .dropdown-menu > li > a {
  color: #444 !important;
  padding: 14px 20px !important;
  display: block;
  transition: background-color .2s ease, color .2s ease;
}

#menu .nav > li .dropdown-menu > li > a:hover {
  color: #1f2937 !important;
  background-color: #f8f9fa !important;
}

/* 三级菜单样式 */
#menu .nav > li .dropdown-menu > li.dropdown-submenu {
  position: relative;
}

#menu .nav > li .dropdown-menu > li.dropdown-submenu > a::after {
  content: '▶';
  position: absolute;
  right: 14px;
  font-size: 10px;
}

#menu .nav > li .dropdown-menu > li.dropdown-submenu > .dropdown-menu {
  position: absolute;
  left: 100%;
  top: 0;
  background: #fff;
  min-width: 260px;
  display: block;
  z-index: 1001;
  border: none !important;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  padding: 10px 0;
}

#menu .nav > li .dropdown-menu > li.dropdown-submenu:hover > .dropdown-menu {
  display: block;
}

#menu .nav > li .dropdown-menu > li.dropdown-submenu > .dropdown-menu > li > a {
  color: #444 !important;
  padding: 14px 20px !important;
  display: block;
  transition: background-color .2s ease, color .2s ease;
}

#menu .nav > li .dropdown-menu > li.dropdown-submenu > .dropdown-menu > li > a:hover {
  color: #1f2937 !important;
  background-color: #f8f9fa !important;
}

@media (min-width: 992px) {
  #menu .nav > li .dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  }

  #menu .nav > li:hover > .dropdown-menu,
  #menu .nav > li.open > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  #menu .nav > li .dropdown-menu > li.dropdown-submenu > .dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  }

  #menu .nav > li .dropdown-menu > li.dropdown-submenu:hover > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
}

/* 移动端样式 */
@media (max-width: 992px) {
  #menu .nav {
    text-align: left;
  }
  
  #menu .nav > li {
    display: block;
  }
  
  #menu .nav > li > a {
    color: #333 !important;
  }

  /* 移动端三级菜单 */
  #menu .nav > li .dropdown-menu > li.dropdown-submenu > .dropdown-menu {
    position: relative;
    left: 0;
    top: 0;
    display: none;
    box-shadow: none;
  }

  #menu .nav > li .dropdown-menu > li.dropdown-submenu.active > .dropdown-menu {
    display: block;
  }
}