/* ===== 知识库管理 · 清爽浅色企业风 v3（与前台统一） ===== */
:root {
  --bg: #f4f8fb;
  --ink: #17293c;
  --ink-dim: #5b7189;
  --ink-faint: #8fa3b8;
  --brand: #0066ff;
  --brand-deep: #0047c9;
  --teal: #00b894;
  --card: #ffffff;
  --card-soft: #f7fafd;
  --line: #e2eaf2;
  --line-strong: #c8d8e8;
  --shadow-sm: 0 1px 3px rgba(23, 41, 60, 0.06), 0 4px 14px rgba(23, 41, 60, 0.05);
  --shadow-md: 0 2px 6px rgba(23, 41, 60, 0.05), 0 16px 40px rgba(23, 41, 60, 0.09);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #eaf3fa 0%, #f8fbfd 40%, var(--bg) 100%);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  padding: 28px 24px;
  display: flex;
  justify-content: center;
  -webkit-font-smoothing: antialiased;
}

.admin-shell { width: min(1040px, 100%); display: flex; flex-direction: column; gap: 18px; }
.eyebrow { margin: 0 0 3px; font-size: 10px; letter-spacing: 0.3em; color: var(--ink-faint); text-transform: uppercase; font-weight: 600; }

.admin-header { display: flex; justify-content: space-between; align-items: flex-end; padding: 0 4px; }
.admin-header h1 { margin: 0; font-size: 22px; font-weight: 800; letter-spacing: 0.04em; color: var(--ink); }
.subline { margin: 4px 0 0; color: var(--ink-dim); font-size: 13px; }
.back-link {
  color: var(--ink); text-decoration: none; font-size: 13px;
  padding: 9px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong); background: var(--card);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.back-link:hover { border-color: var(--brand); box-shadow: 0 4px 16px rgba(0, 102, 255, 0.14); }

.test-notice {
  display: flex; align-items: baseline; gap: 10px;
  background: #fffaf0;
  border: 1px solid #f3dfb2;
  color: #8a6116;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
}
.test-notice strong { flex: 0 0 auto; letter-spacing: 0.06em; }

.summary-grid, .usage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.summary-grid article, .usage-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 15px 18px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.summary-grid article:hover, .usage-grid article:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.summary-grid span, .usage-grid span { display: block; font-size: 11px; color: var(--ink-faint); letter-spacing: 0.14em; margin-bottom: 7px; }
.summary-grid strong, .usage-grid strong { font-size: 22px; font-weight: 800; color: var(--ink); margin-right: 5px; }
.summary-grid small, .usage-grid small { color: var(--ink-faint); font-size: 10.5px; }

.usage-card, .qa-card, .doc-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-md);
}
.usage-heading, .qa-heading, .doc-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }
.usage-heading h2, .qa-heading h2, .doc-heading h2 { margin: 0; font-size: 17px; font-weight: 800; letter-spacing: 0.03em; }
.usage-heading > span { font-size: 11px; color: var(--ink-faint); }

table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--ink-faint); font-weight: 600; font-size: 11px; letter-spacing: 0.1em; }
tbody tr { transition: background 0.15s; }
tbody tr:hover { background: #f5faff; }
.usage-table-wrap { width: 100%; overflow-x: auto; margin-top: 14px; border-radius: var(--radius-sm); }

.qa-search { display: flex; gap: 8px; }
.qa-search input {
  background: var(--card); border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); color: var(--ink);
  padding: 9px 14px; font-size: 13px; font-family: inherit; outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.qa-search input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.12); }
.qa-search button, .upload-form button {
  background: var(--card); color: var(--brand);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); padding: 9px 16px;
  font-size: 12.5px; cursor: pointer; font-family: inherit;
  transition: all 0.2s;
}
.qa-search button:hover, .upload-form button:hover { border-color: var(--brand); box-shadow: 0 2px 10px rgba(0, 102, 255, 0.12); }

.qa-form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.qa-form input, .qa-form textarea {
  background: var(--card-soft); border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); color: var(--ink);
  padding: 11px 14px; font-size: 13px; font-family: inherit;
  resize: vertical; outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.qa-form input:focus, .qa-form textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.12); background: var(--card); }
.qa-form input::placeholder, .qa-form textarea::placeholder { color: var(--ink-faint); }
button.primary {
  background: linear-gradient(140deg, #0d6cff, #0053e0);
  color: #fff; border: 0; border-radius: var(--radius-sm);
  padding: 11px 22px; font-size: 13px; font-weight: 700;
  font-family: inherit; cursor: pointer; letter-spacing: 0.06em;
  box-shadow: 0 6px 16px rgba(0, 102, 255, 0.3);
  transition: transform 0.15s, box-shadow 0.2s;
  width: fit-content;
}
button.primary:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(0, 102, 255, 0.4); }

.qa-list { display: flex; flex-direction: column; gap: 12px; }
.qa-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: var(--card-soft);
  transition: border-color 0.2s, box-shadow 0.2s;
  animation: item-in 0.3s ease;
}
@keyframes item-in { from { opacity: 0; transform: translateY(6px); } }
.qa-item:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.qa-item .q { font-weight: 700; font-size: 13.5px; margin: 0 0 6px; color: var(--ink); }
.qa-item .a { margin: 0; color: var(--ink-dim); font-size: 12.5px; line-height: 1.7; }
.qa-item .meta { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; }
.qa-item .aliases { font-size: 11px; color: var(--ink-faint); }
.qa-item .ops { display: flex; gap: 8px; }
.qa-item .ops button {
  background: var(--card); border: 1px solid var(--line-strong); color: var(--ink-dim);
  border-radius: 8px; padding: 5px 12px; font-size: 11.5px; cursor: pointer; font-family: inherit;
  transition: all 0.2s;
}
.qa-item .ops button:hover { color: #d63031; border-color: rgba(214, 48, 49, 0.4); background: #fff5f5; }
.qa-item.editing { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1); }

.upload-form { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.upload-form input[type="file"] { color: var(--ink-dim); font-size: 12.5px; }
.upload-form input[type="file"]::file-selector-button {
  background: var(--card); color: var(--brand);
  border: 1px solid var(--line-strong); border-radius: 8px;
  padding: 7px 13px; font-size: 12px; margin-right: 12px; cursor: pointer; font-family: inherit;
}
.upload-hint { color: var(--ink-faint); font-size: 12px; margin: 0 0 10px; }
.upload-status { border-radius: var(--radius-sm); padding: 11px 15px; font-size: 12.5px; margin-bottom: 12px; }
.upload-status.ok { background: #f0fbf7; border: 1px solid #bde8d8; color: #00805f; }
.upload-status.err { background: #fff5f5; border: 1px solid #f5c6c6; color: #c0392b; }

.doc-table { margin-top: 6px; }
.doc-table .del-btn {
  background: var(--card); border: 1px solid var(--line-strong); color: #d63031;
  border-radius: 8px; padding: 5px 12px; font-size: 11.5px; cursor: pointer; font-family: inherit;
  transition: all 0.2s;
}
.doc-table .del-btn:hover { background: #fff5f5; border-color: rgba(214, 48, 49, 0.4); }

@media (max-width: 760px) {
  body { padding: 14px 12px; }
  .summary-grid, .usage-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}