/* ==========================================================================
   农学名词 · 语料词条检索系统 — 样式
   主题：自然农业绿，简洁现代
   ========================================================================== */
:root {
  --green-900: #1b4332;
  --green-700: #2d6a4f;
  --green-600: #40916c;
  --green-500: #52b788;
  --green-100: #d8f3dc;
  --green-50: #f0f9f1;
  --amber: #e9a13b;
  --ink: #22343c;
  --ink-2: #51646b;
  --ink-3: #8aa0a8;
  --line: #e3ece9;
  --bg: #f6f9f7;
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(27, 67, 50, .06), 0 8px 24px rgba(27, 67, 50, .08);
  --shadow-sm: 0 1px 2px rgba(27, 67, 50, .05), 0 2px 8px rgba(27, 67, 50, .06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
}

.hidden { display: none !important; }

/* ---------- 顶部 ---------- */
.topbar {
  background: linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 55%, var(--green-600) 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 12px rgba(27, 67, 50, .25);
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; }
.brand-icon { font-size: 30px; filter: drop-shadow(0 2px 4px rgba(0,0,0,.2)); }
.brand-text strong { font-size: 19px; letter-spacing: 1px; display: block; }
.brand-text small { font-size: 12px; opacity: .82; letter-spacing: .5px; }

.search-wrap {
  flex: 1;
  max-width: 620px;
  margin: 0 auto;
  display: flex;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  overflow: hidden;
  transition: background .2s;
}
.search-wrap:focus-within { background: rgba(255,255,255,.2); }
.search-wrap input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 11px 18px;
  font-size: 15px;
  color: #fff;
  outline: none;
}
.search-wrap input::placeholder { color: rgba(255,255,255,.7); }
.btn-search {
  border: none;
  background: transparent;
  color: #fff;
  font-size: 17px;
  padding: 0 16px;
  cursor: pointer;
}
.btn-search:hover { background: rgba(255,255,255,.15); }

.top-actions { display: flex; align-items: center; gap: 12px; }
.admin-badge {
  background: var(--amber);
  color: #fff;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

/* ---------- 布局 ---------- */
.layout {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  padding: 22px 20px 60px;
  align-items: start;
}

/* ---------- 侧栏 ---------- */
.sidebar {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 110px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  font-weight: 700;
  color: var(--green-700);
  border-bottom: 1px solid var(--line);
  background: var(--green-50);
}
.mini-btn {
  border: 1px solid var(--green-100);
  background: #fff;
  color: var(--green-700);
  border-radius: 8px;
  padding: 3px 10px;
  font-size: 12px;
  cursor: pointer;
}
.sidebar-stats {
  padding: 10px 16px;
  font-size: 12px;
  color: var(--ink-3);
  border-bottom: 1px solid var(--line);
  background: var(--green-50);
}
.tree {
  overflow-y: auto;
  padding: 8px 10px;
  flex: 1;
}
.tree ul { list-style: none; }
.tree li { margin: 1px 0; }

.tree-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 9px;
  cursor: pointer;
  color: var(--ink-2);
  font-size: 13.5px;
  transition: background .12s, color .12s;
  user-select: none;
}
.tree-row:hover { background: var(--green-50); color: var(--green-700); }
.tree-row.active { background: var(--green-100); color: var(--green-900); font-weight: 600; }
.tree-row .twist {
  width: 18px;
  text-align: center;
  font-size: 10px;
  color: var(--ink-3);
  flex: none;
}
.tree-row .twist.leaf { visibility: hidden; }
.tree-row .t-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-row .t-num { color: var(--ink-3); font-size: 11px; font-variant-numeric: tabular-nums; }
.tree-row .t-count {
  background: var(--green-100);
  color: var(--green-700);
  font-size: 11px;
  border-radius: 999px;
  padding: 1px 8px;
  font-variant-numeric: tabular-nums;
}
.tree-children { padding-left: 14px; }

/* ---------- 主区 ---------- */
.main { min-width: 0; }
.main-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.crumb {
  font-size: 14px;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.crumb .sep { color: var(--ink-3); }
.crumb .crumb-item { cursor: pointer; }
.crumb .crumb-item:hover { color: var(--green-600); }
.crumb .crumb-cur { color: var(--green-800); font-weight: 700; font-size: 15px; }
.result-meta { font-size: 13px; color: var(--ink-3); }

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.toolbar .spacer { flex: 1; }
.list-info { font-size: 13px; color: var(--ink-3); }

/* ---------- 按钮 ---------- */
.btn {
  border: none;
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 600;
  transition: transform .08s, box-shadow .15s, background .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--green-600);
  color: #fff;
  box-shadow: 0 4px 12px rgba(45,106,79,.3);
}
.btn-primary:hover { background: var(--green-700); }
.btn-outline {
  background: #fff;
  color: var(--green-700);
  border: 1px solid var(--green-500);
}
.btn-outline:hover { background: var(--green-50); }
.btn-ghost {
  background: #fff;
  color: var(--ink-2);
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--green-500); color: var(--green-700); }
.btn-danger {
  background: #fff;
  color: #c0392b;
  border: 1px solid #f0c8c2;
}
.btn-danger:hover { background: #fdf3f2; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------- 词条卡片 ---------- */
.entry-list { display: grid; gap: 12px; }
.entry-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 18px;
  cursor: pointer;
  transition: box-shadow .18s, transform .18s, border-color .18s;
}
.entry-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--green-100);
  transform: translateY(-2px);
}
.ec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.ec-num {
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 12px;
  color: var(--green-600);
  background: var(--green-50);
  border: 1px solid var(--green-100);
  padding: 1px 9px;
  border-radius: 999px;
  font-weight: 600;
}
.ec-zh { font-size: 17.5px; font-weight: 700; color: var(--ink); letter-spacing: .5px; }
.ec-en {
  font-size: 13.5px;
  color: var(--green-700);
  font-family: "Georgia", "Times New Roman", serif;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}
.ec-def {
  color: var(--ink-2);
  font-size: 13.5px;
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ec-path {
  margin-top: 8px;
  font-size: 12px;
  color: var(--ink-3);
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.ec-path .chip {
  background: var(--green-50);
  border: 1px solid var(--green-100);
  color: var(--green-700);
  border-radius: 6px;
  padding: 1px 8px;
}
.ec-empty { color: #c0392b; font-size: 12px; }

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.page-btn {
  min-width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 9px;
  cursor: pointer;
  font-size: 13px;
  color: var(--ink-2);
  transition: all .12s;
}
.page-btn:hover { border-color: var(--green-500); color: var(--green-700); }
.page-btn.active { background: var(--green-600); color: #fff; border-color: var(--green-600); }
.page-btn:disabled { opacity: .45; cursor: default; }

/* ---------- 空状态 ---------- */
.empty-state { text-align: center; padding: 80px 20px; color: var(--ink-3); }
.empty-icon { font-size: 52px; margin-bottom: 12px; opacity: .8; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(18, 36, 30, 0.5);
  /* 不使用 backdrop-filter：滚动时每帧重模糊整个背景，GPU 开销大导致卡顿 */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  animation: fadeIn .15s ease;
}
.modal {
  background: #fff;
  border-radius: 16px;
  max-width: 720px;
  width: 100%;
  max-height: 88vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  animation: pop .16s ease;
  transform: translateZ(0);          /* 提升为独立合成层，滚动不触发页面级重排 */
  will-change: transform;
  backface-visibility: hidden;
}
.modal-sm { max-width: 400px; }
@keyframes pop { from { transform: scale(.97); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--green-50);
}
.modal-head h3 { color: var(--green-800); font-size: 16px; }
.modal-close {
  border: none;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
  color: var(--ink-3);
  width: 32px; height: 32px;
  border-radius: 8px;
}
.modal-close:hover { background: #fff; color: var(--ink); }
.modal-body {
  padding: 20px;
  overflow-y: auto;
  overscroll-behavior: contain;   /* 滚动到边界不再穿透到背景页面，避免联动卡顿 */
  -webkit-overflow-scrolling: touch;
}
.modal-foot {
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  background: var(--bg);
}

/* 详情 */
.detail-field { margin-bottom: 14px; }
.detail-label {
  font-size: 12px;
  color: var(--ink-3);
  font-weight: 700;
  letter-spacing: .5px;
  margin-bottom: 4px;
  display: block;
}
.detail-zh { font-size: 22px; font-weight: 800; color: var(--ink); }
.detail-en { font-size: 15px; color: var(--green-700); font-style: italic; font-family: Georgia, serif; }
.detail-def {
  background: var(--green-50);
  border: 1px solid var(--green-100);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.85;
  text-align: justify;
}
.detail-empty { color: #c0392b; }
.detail-path { font-size: 13px; color: var(--ink-2); }
.detail-meta { font-size: 12px; color: var(--ink-3); }

/* 表单 */
.field {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  margin: 6px 0 14px;
  outline: none;
  font-family: inherit;
  background: #fff;
}
.field:focus { border-color: var(--green-500); box-shadow: 0 0 0 3px rgba(82,183,136,.15); }
textarea.field { min-height: 120px; resize: vertical; line-height: 1.7; }
label { font-size: 13px; color: var(--ink-2); font-weight: 600; }
.form-msg { font-size: 13px; color: #c0392b; min-height: 18px; margin-top: 4px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--green-900);
  color: #fff;
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  z-index: 200;
  animation: pop .2s ease;
}
.toast.err { background: #b23a2e; }

/* 章节管理 */
.section-list { display: grid; gap: 8px; }
.section-item {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff;
}
.section-item .si-info { flex: 1; min-width: 0; }
.section-item .si-num { font-size: 12px; color: var(--green-600); font-family: monospace; }
.section-item .si-title { font-weight: 600; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: 40vh; }
  .topbar-inner { flex-wrap: wrap; }
  .search-wrap { order: 3; flex-basis: 100%; }
}

/* 滚动条 */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: #c9dcd3; border-radius: 9px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-500); }
::-webkit-scrollbar-track { background: transparent; }

/* 高亮 */
mark { background: #ffe9a8; border-radius: 3px; padding: 0 2px; color: inherit; }

/* ==========================================================================
   瀑布流批量管理
   ========================================================================== */
.masonry-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.chips { display: flex; gap: 8px; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all .12s;
}
.chip:hover { border-color: var(--green-500); color: var(--green-700); }
.chip.active { background: var(--green-600); color: #fff; border-color: var(--green-600); }

.masonry {
  column-count: 4;
  column-width: 280px;
  column-gap: 14px;
}
.m-card {
  break-inside: avoid;
  margin-bottom: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  padding: 12px 14px;
  position: relative;
  cursor: pointer;
  transition: box-shadow .15s, border-color .15s;
}
.m-card:hover { box-shadow: var(--shadow); border-color: var(--green-100); }
.m-card.sel { border-color: var(--green-500); box-shadow: 0 0 0 2px rgba(82,183,136,.25); }
.m-check {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--green-600);
  z-index: 2;
}
.m-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-right: 26px;
  margin-bottom: 6px;
}
.m-zh { font-size: 16px; font-weight: 700; color: var(--ink); margin: 2px 0 2px; }
.m-en { font-size: 12.5px; color: var(--green-700); font-style: italic; font-family: Georgia, serif; margin-bottom: 4px; word-break: break-all; }
.m-def {
  font-size: 12.5px;
  color: var(--ink-2);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  position: relative;
  text-align: justify;
}
.m-def.expanded { display: block; -webkit-line-clamp: unset; }
.m-expand {
  border: none;
  background: transparent;
  color: var(--green-600);
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  margin-top: 2px;
  display: none;
}
.m-def:not(.expanded) .m-expand { display: block; }

/* 批量操作悬浮栏 */
.bulk-bar {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  background: var(--green-900);
  color: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 150;
  flex-wrap: wrap;
  max-width: 92vw;
}
.bulk-count { font-weight: 700; font-size: 14px; margin-right: 4px; }
.bulk-bar .btn-outline { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.35); }
.bulk-bar .btn-outline:hover { background: rgba(255,255,255,.2); }
.bulk-bar .btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1px solid transparent; }
.bulk-bar .btn-danger { background: #b23a2e; }

.masonry-more {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 8px;
  padding: 8px;
}

/* 响应式：缩小屏降列数 */
@media (max-width: 1100px) { .masonry { column-count: 3; } }
@media (max-width: 760px) { .masonry { column-count: 2; } }
@media (max-width: 480px) { .masonry { column-count: 1; } }