/* ┌────────────────────────────────────────────┐
 * │ 9.2  导航栏                                 │
 * └────────────────────────────────────────────┘ */

/* ── 导航容器 ── */
.nav-container {
  position: fixed;
  top: 10px;
  right: 30px;
  z-index: 1000;
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  padding: 10px; /* ✅ 保留原始 padding，位置不变 */

  /*
   * ✅ 关键：容器本身不接收鼠标事件
   * hover 判定完全交给子元素（按钮和菜单）
   */
  pointer-events: none;

  transform: translateY(0);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  contain: layout style;
}

/* ✅ 当子元素被 hover 时，用 :has() 反向触发容器下沉 */
.nav-container:has(:hover),
.nav-container.active {
  transform: translateY(3px);
}

/* ── 导航触发按钮（汉堡菜单） ── */
.nav-trigger {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
  will-change: box-shadow;

  /* ✅ 恢复鼠标事件，只有按钮本身可交互 */
  pointer-events: auto;
}

.nav-trigger span {
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: background 0.3s ease;
}

/* ── 导航菜单列表 ── */
.nav-menu {
  display: flex;
  list-style: none;
  gap: 5px;
  margin: 0 12px 0 0; /* ✅ 恢复原始 margin */
  padding: 4px 8px;
  border-radius: 30px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;

  transform: translateX(10px) scaleX(0);
  transform-origin: right center;
  opacity: 0;
  pointer-events: none; /* 收起时不可交互 */

  transition:
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.3s ease;

  will-change: transform, opacity;
  contain: layout style;
}

/*
 * ✅ 桥接伪元素：填补菜单和按钮之间的间隙
 * 防止鼠标从菜单移向按钮时经过 gap 导致 hover 断开
 */
.nav-menu::before {
  content: "";
  position: absolute;
  top: 0;
  right: -16px;
  bottom: 0;
  width: 16px;
}

/*
 * ✅ 展开菜单：用 :has() 检测按钮是否被 hover
 * 不再依赖 container:hover，彻底消除 padding 区域的误触发
 */
.nav-container:has(.nav-trigger:hover) .nav-menu,
.nav-container:has(.nav-menu:hover) .nav-menu,
.nav-container.active .nav-menu {
  transform: translateX(0) scaleX(1);
  opacity: 1;
  pointer-events: auto; /* ✅ 展开后恢复鼠标事件 */
}

/* ── 按钮悬停样式 ── */
.nav-container:has(.nav-trigger:hover) .nav-trigger,
.nav-container:has(.nav-menu:hover) .nav-trigger,
.nav-container.active .nav-trigger {
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

.nav-container:has(.nav-trigger:hover) .nav-trigger span,
.nav-container:has(.nav-menu:hover) .nav-trigger span,
.nav-container.active .nav-trigger span {
  background: #fff;
}

/* ── 导航链接与按钮（统一样式） ── */
.nav-menu li a,
.nav-action-btn {
  display: flex;
  align-items: center; /* 内容垂直居中 */
  justify-content: center;
  padding: 10px 16px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  border-radius: 16px;
  position: relative;
  z-index: 3;
  isolation: isolate;
  border: none;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  gap: 6px;
  pointer-events: auto;
  height: 40px; /* ✅ 统一高度 */
  box-sizing: border-box; /* ✅ padding 不撑大高度 */
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── 语言切换按钮 ── */
.lang-btn {
  padding: 10px 16px;
  border-radius: 16px;
  height: 40px; /* ✅ 与 nav-action-btn 一致 */
  align-self: center; /* ✅ 强制垂直居中 */
  box-sizing: border-box;
  display: flex; /* ✅ 确保内容也 flex 居中 */
  align-items: center;
  justify-content: center;
}

/* ── 导航项悬停：上浮 ── */
.nav-menu li a:hover,
.nav-action-btn:hover {
  transform: translateY(-3px);
}

/* ── 光晕伪元素 ── */
.nav-menu li a::before,
.nav-action-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.6),
    rgba(255, 255, 255, 0.2) 50%,
    transparent 90%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
  pointer-events: none;
}

.nav-menu li a:hover::before,
.nav-action-btn:hover::before {
  opacity: 1;
}

/* ── 导航按钮 SVG 图标 ── */
.nav-action-btn svg {
  stroke: #ffffff;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ── 语言切换按钮 ── */
.lang-btn {
  padding: 10px 16px;
  border-radius: 16px;
}

/* ── 导航分割线 ── */
.nav-divider {
  width: 1.5px;
  height: 26px;
  align-self: center;
  margin: 0 1px;
  background-color: rgba(255, 255, 255, 0.6);
  flex-shrink: 0;
  border-radius: 1px;
}