/* 零代码工具箱 · 全站顶栏（docsmall 风格 + bejson 悬停菜单） */
:root {
  --ldm-nav-h: 56px;
  --ldm-nav-bg: #ffffff;
  --ldm-nav-text: #1f2937;
  --ldm-nav-muted: #6b7280;
  --ldm-nav-accent: #16a34a;
  --ldm-nav-accent-soft: rgba(22, 163, 74, 0.08);
  --ldm-nav-accent-hover: #15803d;
  --ldm-nav-border: #eef0f3;
  --ldm-nav-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

body.ldm-nav-ready {
  padding-top: var(--ldm-nav-h) !important;
}

#ldm-site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2147483000;
  height: var(--ldm-nav-h);
  background: var(--ldm-nav-bg);
  color: var(--ldm-nav-text);
  border-bottom: 1px solid var(--ldm-nav-border);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

#ldm-site-nav *,
#ldm-site-nav *::before,
#ldm-site-nav *::after {
  box-sizing: border-box;
}

.ldm-nav-inner {
  max-width: 1180px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.ldm-nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ldm-nav-text);
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.ldm-nav-brand:hover {
  color: var(--ldm-nav-accent);
}

.ldm-nav-logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.ldm-nav-menus {
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: 100%;
  flex: 1;
  min-width: 0;
  overflow: visible;
}

.ldm-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.ldm-nav-trigger {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ldm-nav-text);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  line-height: 1.2;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  white-space: nowrap;
}

.ldm-nav-trigger::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid #9ca3af;
  margin-left: 2px;
  transition: transform 0.15s ease;
}

.ldm-nav-trigger--link::after {
  display: none;
}

.ldm-nav-item:hover .ldm-nav-trigger,
.ldm-nav-item.is-open .ldm-nav-trigger,
.ldm-nav-trigger:hover,
.ldm-nav-item--link.is-current-top .ldm-nav-trigger {
  color: var(--ldm-nav-accent);
  background: var(--ldm-nav-accent-soft);
}

.ldm-nav-item:hover .ldm-nav-trigger::after,
.ldm-nav-item.is-open .ldm-nav-trigger::after {
  border-top-color: var(--ldm-nav-accent);
  transform: rotate(180deg);
}

.ldm-nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--ldm-nav-border);
  border-radius: 12px;
  box-shadow: var(--ldm-nav-shadow);
  margin-top: 0;
}

/* 桥接缝隙，避免鼠标移到下拉时断开 */
.ldm-nav-dropdown::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
}

.ldm-nav-item:hover .ldm-nav-dropdown,
.ldm-nav-item.is-open .ldm-nav-dropdown {
  display: block;
}

.ldm-nav-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 8px;
  color: #374151;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}

.ldm-nav-dropdown a span {
  min-width: 0;
}

.ldm-nav-ico {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
}

.ldm-nav-soon {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 8px;
  color: #9ca3af;
  font-size: 13px;
  line-height: 1.35;
  cursor: default;
  user-select: none;
}

.ldm-nav-soon .ldm-nav-ico {
  opacity: 0.55;
  filter: grayscale(0.4);
}

.ldm-nav-soon-badge {
  margin-left: auto;
  flex-shrink: 0;
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  color: #b45309;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 999px;
  padding: 1px 7px;
  line-height: 1.4;
}

.ldm-nav-search-item--soon {
  opacity: 0.85;
  cursor: default;
}

.ldm-nav-search-item--soon:hover {
  background: #f9fafb;
}

.ldm-nav-dropdown a:hover {
  background: var(--ldm-nav-accent-soft);
  color: var(--ldm-nav-accent-hover);
}

.ldm-nav-dropdown a.is-current {
  background: var(--ldm-nav-accent-soft);
  color: var(--ldm-nav-accent-hover);
  font-weight: 600;
}

/* 文档工具：宽面板多列 */
.ldm-nav-dropdown--mega {
  width: min(720px, calc(100vw - 32px));
  padding: 16px 18px 18px;
  left: 0;
}

.ldm-nav-mega-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px 20px;
}

.ldm-nav-mega-col-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--ldm-nav-muted);
  margin: 0 0 8px;
  padding: 0 12px 8px;
  border-bottom: 1px solid var(--ldm-nav-border);
  letter-spacing: 0.3px;
}

.ldm-nav-mega-col a {
  padding: 7px 12px;
}

.ldm-nav-mega-foot {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--ldm-nav-border);
}

.ldm-nav-mega-foot a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--ldm-nav-accent);
  font-weight: 600;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 8px;
}

.ldm-nav-mega-foot a:hover {
  background: var(--ldm-nav-accent-soft);
}

.ldm-nav-search {
  margin-left: auto;
  flex-shrink: 0;
  position: relative;
  width: 220px;
}

.ldm-nav-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--ldm-nav-border);
  border-radius: 8px;
  background: #f8faf9;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.ldm-nav-search-box:focus-within {
  background: #fff;
  border-color: rgba(22, 163, 74, 0.45);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.12);
}

.ldm-nav-search-icon {
  flex-shrink: 0;
  color: #9ca3af;
  display: flex;
}

.ldm-nav-search-input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  font: inherit;
  font-size: 13px;
  color: var(--ldm-nav-text);
  line-height: 1.2;
}

.ldm-nav-search-input::placeholder {
  color: #9ca3af;
}

.ldm-nav-search-clear {
  appearance: none;
  border: 0;
  background: transparent;
  color: #9ca3af;
  cursor: pointer;
  padding: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
}

.ldm-nav-search-clear:hover {
  background: #e5e7eb;
  color: #4b5563;
}

.ldm-nav-search.has-value .ldm-nav-search-clear {
  display: inline-flex;
}

.ldm-nav-search-panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: min(360px, calc(100vw - 24px));
  max-height: min(420px, 70vh);
  overflow: auto;
  background: #fff;
  border: 1px solid var(--ldm-nav-border);
  border-radius: 12px;
  box-shadow: var(--ldm-nav-shadow);
  padding: 8px;
  z-index: 2;
}

.ldm-nav-search.is-open .ldm-nav-search-panel {
  display: block;
}

.ldm-nav-search-hint,
.ldm-nav-search-empty {
  padding: 16px 12px;
  font-size: 13px;
  color: var(--ldm-nav-muted);
  text-align: center;
}

.ldm-nav-search-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
}

.ldm-nav-search-item:hover,
.ldm-nav-search-item.is-active {
  background: var(--ldm-nav-accent-soft);
}

.ldm-nav-search-item-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.ldm-nav-search-item-name {
  font-size: 13px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.35;
}

.ldm-nav-search-item-name mark {
  background: rgba(22, 163, 74, 0.18);
  color: var(--ldm-nav-accent-hover);
  border-radius: 2px;
  padding: 0 1px;
}

.ldm-nav-search-item-group {
  font-size: 12px;
  color: var(--ldm-nav-muted);
}

.ldm-nav-backdrop {
  display: none;
}

@media (max-width: 980px) {
  .ldm-nav-mega-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ldm-nav-inner {
    gap: 12px;
    padding: 0 12px;
  }
  .ldm-nav-trigger {
    padding: 8px 10px;
    font-size: 13px;
  }
  .ldm-nav-search {
    width: 180px;
  }
}

/* 手机端：更大触控区 + 固定下拉（避免被横向滚动容器裁切） */
@media (max-width: 768px) {
  :root {
    --ldm-nav-h: 64px;
  }

  #ldm-site-nav {
    height: var(--ldm-nav-h);
  }

  .ldm-nav-inner {
    gap: 10px;
    padding: 0 10px;
  }

  .ldm-nav-brand {
    font-size: 15px;
    gap: 6px;
  }

  .ldm-nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .ldm-nav-menus {
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 -4px;
    padding: 0 4px;
  }

  .ldm-nav-menus::-webkit-scrollbar {
    display: none;
  }

  .ldm-nav-item {
    flex-shrink: 0;
  }

  .ldm-nav-trigger {
    min-height: 44px;
    padding: 10px 14px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 10px;
    background: #f3f4f6;
  }

  .ldm-nav-item.is-open .ldm-nav-trigger,
  .ldm-nav-item--link.is-current-top .ldm-nav-trigger {
    color: var(--ldm-nav-accent);
    background: var(--ldm-nav-accent-soft);
  }

  /* 关键依赖 hover，手机端用 .is-open */
  .ldm-nav-item:hover .ldm-nav-dropdown {
    display: none;
  }

  .ldm-nav-item.is-open .ldm-nav-dropdown,
  .ldm-nav-item.is-open .ldm-nav-dropdown--mega {
    display: block;
  }

  .ldm-nav-dropdown,
  .ldm-nav-dropdown--mega {
    position: fixed;
    top: var(--ldm-nav-h);
    left: 10px;
    right: 10px;
    width: auto;
    min-width: 0;
    max-height: min(70vh, calc(100vh - var(--ldm-nav-h) - 16px));
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 2147483001;
    border-radius: 14px;
    padding: 12px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.16);
  }

  .ldm-nav-dropdown::before {
    display: none;
  }

  .ldm-nav-mega-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px 10px;
  }

  .ldm-nav-dropdown a,
  .ldm-nav-soon {
    min-height: 44px;
    padding: 11px 12px;
    font-size: 14px;
  }

  .ldm-nav-ico {
    width: 20px;
    height: 20px;
  }

  .ldm-nav-search {
    width: 48px;
    flex-shrink: 0;
  }

  .ldm-nav-search-box {
    height: 44px;
    padding: 0 12px;
    justify-content: center;
  }

  .ldm-nav-search:not(.is-expanded) .ldm-nav-search-input,
  .ldm-nav-search:not(.is-expanded) .ldm-nav-search-clear {
    display: none;
  }

  .ldm-nav-search.is-expanded {
    position: absolute;
    left: 10px;
    right: 10px;
    width: auto;
    z-index: 2147483002;
  }

  .ldm-nav-search.is-expanded .ldm-nav-search-box {
    justify-content: flex-start;
    background: #fff;
    box-shadow: var(--ldm-nav-shadow);
  }

  .ldm-nav-search-panel {
    position: fixed;
    left: 10px;
    right: 10px;
    width: auto;
    top: calc(var(--ldm-nav-h) + 4px);
    max-height: min(70vh, calc(100vh - var(--ldm-nav-h) - 16px));
    z-index: 2147483002;
  }

  .ldm-nav-search-item {
    min-height: 48px;
    padding: 12px;
  }

  .ldm-nav-backdrop {
    display: none;
    position: fixed;
    inset: var(--ldm-nav-h) 0 0 0;
    background: rgba(15, 23, 42, 0.35);
    z-index: 2147482999;
  }

  body.ldm-nav-menu-open .ldm-nav-backdrop {
    display: block;
  }

  body.ldm-nav-menu-open {
    overflow: hidden;
  }
}

@media (max-width: 420px) {
  .ldm-nav-brand > span {
    max-width: 5em;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .ldm-nav-mega-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ldm-nav-trigger::after,
  .ldm-nav-search-box {
    transition: none;
  }
}