/*! responsive-nav.js 1.0.39 by @viljamis — 适配本仓库暗色 topnav 的定制版 */
.nav-collapse ul {
  margin: 0;
  padding: 0;
  width: 100%;
  list-style: none;
}
.nav-collapse li {
  width: 100%;
  display: block;
}
.nav-collapse a {
  display: block;
  width: 100%;
}

/* 折叠态基础（窄屏默认隐藏整块菜单，仅保留汉堡按钮） */
.js .nav-collapse {
  clip: rect(0 0 0 0);
  max-height: 0;
  position: absolute;
  display: block;
  overflow: hidden;
  zoom: 1;
}
.nav-collapse.opened {
  max-height: 9999px;
}

/* 汉堡按钮基础样式（暗色导航适配） */
.wb-topnav .nav-toggle {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
  display: block;
  color: #fff;
  font-size: 18px;
  line-height: 1;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.wb-topnav .nav-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

/* ---- 宽屏（≥52em≈832px）：横向菜单，隐藏汉堡 ----
   用 .wb-topnav 前缀提升优先级，压过基础 display:block，确保桌面不显示汉堡 */
@media screen and (min-width: 52em) {
  .js .nav-collapse {
    position: relative;
    max-height: none;
    clip: auto;
    overflow: visible;
  }
  .wb-topnav .nav-collapse ul {
    display: flex;
    gap: 6px;
    width: auto;
  }
  .wb-topnav .nav-collapse li {
    width: auto;
    display: inline-block;
  }
  .wb-topnav .nav-collapse a {
    width: auto;
  }
  .wb-topnav .nav-toggle {
    display: none;
  }
}

/* ---- 窄屏（<52em）：汉堡展开后的下拉面板，浮在导航栏下方 ---- */
@media screen and (max-width: 51.99em) {
  .wb-topnav .nav-collapse {
    top: 52px;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #0a2540, #0a66c2);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    padding: 6px 0;
    z-index: 9998;
  }
  .wb-topnav .nav-collapse li a {
    color: #dbeafe;
    padding: 12px 18px;
    border-radius: 0;
  }
  .wb-topnav .nav-collapse li a:hover {
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
  }
  .wb-topnav .nav-collapse li a.active {
    background: #fff;
    color: #0a2540;
    font-weight: 700;
  }
}