/* ================================================================
   nav-enhance.css  — 双行响应式导航系统
   行1 主行(56px)  行2 工具行(40px)  移动端遮罩
   断点: ≥1280 完整展示 | 1024-1279 横向滚动 | <1024 汉堡模式
   ================================================================ */

/* ── 汉堡按钮: 默认隐藏，≤1023px 显示 ─────────────────────── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #7DD3FC;
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
  margin-left: auto;
  /* 保证在主行内靠右紧贴用户区 */
}

/* ── 移动端全屏遮罩: 默认隐藏 ──────────────────────────────── */
.qhy-mob-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 10, 20, .97);
  z-index: 9000;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}
.qhy-mob-overlay.nav-open { display: flex; }

/* 遮罩: 顶部品牌条 */
.qhy-mob-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(56, 189, 248, .10);
  flex-shrink: 0;
}
.qhy-mob-brand {
  color: #E2E8F0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .03em;
}
.nav-close {
  background: none;
  border: none;
  color: #7DD3FC;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 10px;
}

/* 遮罩: 导航链接区 */
.qhy-mob-nav {
  flex: 1;
  padding: 10px 16px 16px;
  overflow-y: auto;
}
.qhy-mob-group-label {
  margin: 18px 0 6px;
  padding: 0 12px 8px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: #2A4060;
  border-bottom: 1px solid rgba(56, 189, 248, .08);
}
.qhy-mob-group-label:first-child { margin-top: 6px; }
.qhy-mob-nav a {
  display: block;
  color: #7DD3FC;
  font-size: 15px;
  padding: 11px 14px;
  border-radius: 6px;
  text-decoration: none;
  transition: background .14s, color .14s;
  white-space: nowrap;
}
.qhy-mob-nav a:hover,
.qhy-mob-nav a.active {
  background: rgba(56, 189, 248, .12);
  color: #E2E8F0;
}

/* 遮罩: 底部用户区 */
.qhy-mob-user {
  border-top: 1px solid rgba(56, 189, 248, .10);
  padding: 14px 20px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #5E7A93;
  font-size: 14px;
}
.qhy-mob-user a {
  color: #38BDF8;
  text-decoration: none;
  font-size: 13px;
}

/* ── 业务域下拉菜单 (NAV-01业务域菜单重构) ──────────────────── */
.qhy-nav-item { position: relative; height: 56px; display: flex; align-items: center; }
.qhy-nav-trigger {
  background: none; border: none; font: inherit; cursor: pointer;
  color: #5E7A93; padding: 0 10px; font-size: 13.5px; white-space: nowrap;
  height: 56px; line-height: 56px; border-bottom: 2px solid transparent;
  transition: color .14s, border-color .14s;
}
.qhy-nav-trigger::after { content: '▾'; font-size: 9px; margin-left: 4px; opacity: .6; }
.qhy-nav-item:hover .qhy-nav-trigger,
.qhy-nav-item.nav-open .qhy-nav-trigger,
.qhy-nav-trigger.active { color: #38BDF8; border-bottom-color: #38BDF8; }

.qhy-nav-dropdown {
  display: none; position: absolute; top: 56px; left: 0; min-width: 176px;
  background: #0D1520; border: 1px solid rgba(56,189,248,.14);
  border-top: 2px solid #38BDF8; box-shadow: 0 12px 28px rgba(0,0,0,.45);
  padding: 6px 0; z-index: 200;
}
.qhy-nav-item:hover .qhy-nav-dropdown,
.qhy-nav-item:focus-within .qhy-nav-dropdown,
.qhy-nav-item.nav-open .qhy-nav-dropdown { display: block; }
.qhy-nav-dropdown a {
  display: block; color: #5E7A93; padding: 9px 16px; font-size: 13px;
  white-space: nowrap; text-decoration: none; transition: background .12s, color .12s;
}
.qhy-nav-dropdown a:hover, .qhy-nav-dropdown a.active { background: rgba(56,189,248,.10); color: #E2E8F0; }

/* ── 顶部细条 ──────────────────────────────────────────────── */
.qhy-topline { background: #0B1F3A; }
.qhy-topline-inner > span:first-child { color: #4A6A84; font-size: 12px; }
.qhy-toplinks { color: #2E4A62 !important; letter-spacing: .08em; }

/* ================================================================
   响应式断点
   ================================================================ */

/* ── ≥1280px: 宽桌面，完整双行展示 ──────────────────────── */
/* 默认样式已在 main.css 处理，此处无需额外规则 */

/* ── 1024px–1279px: 笔记本，允许主导航横向滚动 ─────────── */
@media (max-width: 1279px) {
  .qhy-main-nav a { padding: 0 8px; font-size: 13px; }
  .qhy-tool-nav a { padding: 0 9px; font-size: 12px; }
  .qhy-brand { min-width: 190px; }
  .qhy-brand-text b { font-size: 15px; }
}

/* ── <1024px: 平板/移动端 — 汉堡模式 ───────────────────── */
@media (max-width: 1023px) {
  /* 显示汉堡按钮 */
  .nav-toggle { display: block; }

  /* 隐藏桌面内联导航 */
  .qhy-main-nav  { display: none; }
  .qhy-tool-row  { display: none; }

  /* 隐藏桌面用户区 (已在移动遮罩中展示) */
  .qhy-userbox   { display: none; }

  /* 主行高度收紧 */
  .qhy-main-row-inner { height: 52px; padding: 0 16px; }

  /* 品牌副标题隐藏节省空间 */
  .qhy-brand-text em { display: none; }
}

/* ── <768px: 手机 ── */
@media (max-width: 767px) {
  .qhy-main-row-inner { height: 48px; padding: 0 14px; }
  .qhy-logo-mark, .logo { width: 32px; height: 32px; font-size: 18px; }
  .qhy-brand-text b { font-size: 15px; }
  .nav-toggle { font-size: 22px; }
  .qhy-mob-nav a { font-size: 14px; padding: 10px 12px; }
}

/* ── <390px: 超窄屏 ── */
@media (max-width: 389px) {
  .qhy-main-row-inner { padding: 0 10px; }
  .qhy-brand-text b { font-size: 14px; }
}