/* ===== 导航二级菜单样式 ===== */

/* 有子菜单的父级标识 - 下拉箭头 */
.nav-menu li.has-submenu > a::after {
    content: '\25BE';
    font-size: 11px;
    margin-left: 6px;
    vertical-align: middle;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.nav-menu li.has-submenu:hover > a::after {
    opacity: 1;
}

/* 子菜单容器 */
.nav-menu .submenu {
    list-style: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background-color: #fff;
    min-width: 150px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
    border-radius: 0 0 6px 6px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
    padding: 4px 0;
}

/* 桌面端 hover 展开子菜单 */
@media (hover: hover) and (pointer: fine) {
    .nav-menu li.has-submenu:hover .submenu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }

    .nav-menu li.has-submenu:hover .submenu,
    .nav-menu li.has-submenu:focus-within .submenu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }
}

/* 子菜单 JS 控制展开（移动端点击） */
.nav-menu .submenu.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 子菜单项 */
.submenu li {
    padding: 0 !important;
    width: auto !important;
    text-align: left !important;
}

.submenu li a {
    display: block;
    padding: 10px 22px;
    color: #444;
    font-weight: normal !important;
    font-size: 14px;
    white-space: nowrap;
    transition: background-color 0.2s, color 0.2s, padding-left 0.2s;
}

.submenu li a:hover {
    background-color: #e8f2fd;
    color: #005aa6;
    padding-left: 26px;
}

.submenu li:first-child a {
    border-radius: 4px 4px 0 0;
}

.submenu li:last-child a {
    border-radius: 0 0 4px 4px;
}

/* 子菜单分隔线 */
.submenu li + li {
    border-top: 1px solid #f0f0f0;
}

/* 当前页面对应的子菜单项高亮 */
.submenu li a.current {
    background-color: #cce5ff;
    color: #005aa6;
    font-weight: bold !important;
}

/* ========== 响应式：移动端子菜单 ========== */
@media (max-width: 767px) {
    .nav-menu li.has-submenu {
        position: relative;
    }

    .nav-menu .submenu {
        left: 0;
        right: auto;
        transform: translateY(-8px);
        min-width: 100%;
    }

    .nav-menu .submenu.show {
        transform: translateY(0);
    }

    @media (hover: hover) and (pointer: fine) {
        .nav-menu li.has-submenu:hover .submenu {
            transform: translateY(0);
        }
    }

    .submenu li a {
        font-size: 13px;
        padding: 10px 18px;
    }
}

/* ========== 移动端汉堡菜单 ========== */

/* 汉堡按钮 - 默认隐藏（桌面端） */
.hamburger-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  margin-left: auto;
  z-index: 300;
}

.hamburger-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: #005aa6;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* 汉堡按钮激活态 → X */
.hamburger-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.hamburger-toggle.active span:nth-child(2) {
  opacity: 0;
}
.hamburger-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========== 移动端菜单样式 ========== */
@media (max-width: 767px) {
  .hamburger-toggle {
    display: flex;        /* 移动端显示 */
    position: absolute;
    right: 16px;
    top: 10px;
  }

  .nav-bar {
    position: relative;
    display: flex;
    align-items: center;
    padding: 10px 16px !important;
    min-height: 48px;
  }

  /* 移动端菜单标题（导航栏左侧品牌标识） */
  .nav-bar::before {
    content: '菜单导航';
    font-size: 15px;
    font-weight: bold;
    color: #005aa6;
  }

  .nav-menu {
    display: none;               /* 默认隐藏 */
    flex-direction: column;      /* 垂直排列 */
    width: 100% !important;
    margin: 0 !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    z-index: 250;
    border-top: 1px solid #005aa6;
  }

  .nav-menu.show {
    display: flex;               /* JS 控制展开 */
  }

  .nav-menu li {
    width: 100% !important;
    padding: 14px 20px !important;
    text-align: left !important;
    border-bottom: 1px solid #eee;
  }

  .nav-menu li a {
    font-size: 15px !important;
    display: block;
    width: 100%;
  }

  /* 移动端子菜单 */
  .nav-menu .submenu {
    position: static !important;
    transform: none !important;
    box-shadow: none;
    border-radius: 0;
    margin-top: 4px;
    padding: 0;
    background: #f8f9fa;
    display: none;
  }

  .nav-menu .submenu.show {
    display: block;
  }

  .nav-menu .submenu li {
    border-bottom: none;
    padding: 0 !important;
  }

  .nav-menu .submenu li a {
    padding: 10px 32px !important;
    font-size: 14px !important;
  }

  /* 覆盖 hover 伪元素 */
  .nav-menu li:hover::after,
  .nav-menu li.active::after {
    display: none;
  }
}