:root {
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f3f4f6;
  --card: #ffffff;
  --ok: #16a34a;
  --ok-bg: #f0fdf4;
  --warn: #d97706;
  --warn-bg: #fffbeb;
  --err: #dc2626;
  --err-bg: #fef2f2;
  --info-bg: #eff6ff;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 14px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink); background: var(--bg);
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3,h4 { margin: 0 0 .5em; line-height: 1.3; }
h1 { font-size: 20px; } h2 { font-size: 17px; } h3 { font-size: 15px; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }
img { max-width: 100%; }

/* ---------- 布局 ---------- */
.app { min-height: 100vh; display: flex; }
.side {
  width: 216px; flex: 0 0 216px; background: #111827; color: #d1d5db;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.side .brand { padding: 18px 16px; font-size: 15px; font-weight: 700; color: #fff; border-bottom: 1px solid #1f2937; }
.side .brand small { display: block; font-weight: 400; font-size: 11px; color: #9ca3af; margin-top: 2px; }
.side nav { flex: 1; padding: 10px 8px; overflow: auto; }
.side nav a {
  display: flex; align-items: center; gap: 8px; padding: 9px 12px; margin: 2px 0;
  color: #d1d5db; border-radius: 8px; font-size: 13.5px;
}
.side nav a:hover { background: #1f2937; text-decoration: none; color: #fff; }
.side nav a.active { background: var(--brand); color: #fff; }
.side .side-foot { padding: 12px; border-top: 1px solid #1f2937; font-size: 12px; color: #9ca3af; }
.main { flex: 1; min-width: 0; }
.topbar {
  background: var(--card); border-bottom: 1px solid var(--line); padding: 10px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; position: sticky; top: 0; z-index: 20;
}
.topbar .crumb { font-size: 15px; font-weight: 600; }
.topbar .who { color: var(--muted); font-size: 13px; display:flex; gap:12px; align-items:center;}
.wrap { padding: 20px 22px 40px; max-width: 1180px; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h1 { margin: 0; }
.muted { color: var(--muted); } .small { font-size: 12px; } .mono { font-family: ui-monospace, monospace; }
.flex { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.grow { flex: 1; }
.mt { margin-top: 14px; } .mb { margin-bottom: 14px; }

/* ---------- 卡片 / 网格 ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin-bottom: 16px; }
.card h3 { margin-top: 0; }
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.stat b { font-size: 24px; display: block; color: var(--ink); }
.stat span { color: var(--muted); font-size: 12px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; min-width: 620px; }
.tbl th, .tbl td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { background: #f9fafb; font-size: 12px; color: var(--muted); white-space: nowrap; }
.tbl tr:last-child td { border-bottom: none; }
.tbl .num { text-align: right; }
.tbl tr:hover td { background: #fafbfc; }

/* ---------- 表单 ---------- */
label.f { display: block; margin-bottom: 14px; }
label.f > span { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; }
input[type=text], input[type=password], input[type=url], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid #d1d5db; border-radius: 8px; font: inherit;
  background: #fff; color: var(--ink); max-width: 100%;
}
textarea { min-height: 120px; resize: vertical; }
textarea.code { font-family: ui-monospace, monospace; font-size: 13px; min-height: 380px; line-height: 1.7; }
input:focus, select:focus, textarea:focus { outline: 2px solid #bfdbfe; border-color: var(--brand); }
input[type=checkbox], input[type=radio] { width: auto; margin-right: 5px; accent-color: var(--brand); }
.form-row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.checks { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 6px 0; }
.checks label { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; }
textarea.md { min-height: 420px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  padding: 7px 14px; border-radius: 8px; border: 1px solid transparent; cursor: pointer;
  font-size: 13.5px; text-decoration: none; background: var(--brand); color: #fff; line-height: 1.4;
}
.btn:hover { background: var(--brand-dark); color: #fff; text-decoration: none; }
.btn.ghost { background: #fff; border-color: #d1d5db; color: var(--ink); }
.btn.ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn.danger { background: #fff; border-color: #fca5a5; color: var(--err); }
.btn.danger:hover { background: var(--err); color: #fff; }
.btn.ok { background: var(--ok); } .btn.ok:hover { background: #15803d; }
.btn.sm { padding: 4px 9px; font-size: 12.5px; border-radius: 6px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.block { width: 100%; }
.btn.big { padding: 12px 18px; font-size: 15px; }

/* ---------- 徽标 ---------- */
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; line-height: 1.6; white-space: nowrap; }
.b-ok { background: var(--ok-bg); color: var(--ok); }
.b-warn { background: var(--warn-bg); color: var(--warn); }
.b-err { background: var(--err-bg); color: var(--err); }
.b-info { background: var(--info-bg); color: var(--brand); }
.b-gray { background: #f3f4f6; color: var(--muted); }

/* ---------- 提示条 ---------- */
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 13px; border: 1px solid transparent; }
.flash.ok { background: var(--ok-bg); color: #166534; border-color: #bbf7d0; }
.flash.error { background: var(--err-bg); color: #991b1b; border-color: #fecaca; }
.flash.info { background: var(--info-bg); color: #1e40af; border-color: #bfdbfe; }

/* ---------- 客户端顶栏 ---------- */
.c-top { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; }
.c-top-in { max-width: 980px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 10px; }
.c-top .logo { font-weight: 700; font-size: 16px; color: var(--ink); display:flex; align-items:center; gap:8px;}
.c-top .logo .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand); display:inline-block;}
.c-top .menu { margin-left: auto; display:flex; align-items:center; gap: 2px;}
.c-top .menu a { padding: 6px 10px; border-radius: 7px; font-size: 13.5px; color: var(--muted); }
.c-top .menu a.active { background: #eff6ff; color: var(--brand); font-weight: 600; }
.c-top .menu a:hover { text-decoration: none; background: #f3f4f6; }
.c-body { max-width: 980px; margin: 0 auto; padding: 18px 16px 40px; }

/* ---------- 文章正文预览 ---------- */
.rich { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.rich h2 { font-size: 18px; margin-top: 1.2em; }
.rich p { margin: .6em 0; }
.rich blockquote { margin: .8em 0; padding: 6px 14px; border-left: 4px solid var(--brand); background: #f8fafc; color: var(--muted); }
.rich ul, .rich ol { padding-left: 22px; }
.title-pick { display: block; width: 100%; text-align: left; background:#fff; border:1px solid var(--line); border-radius:8px; padding:9px 12px; margin-bottom:8px; cursor:pointer; font-size:13.5px; }
.title-pick:hover { border-color: var(--brand); }
.title-pick:has(input:checked) { border-color: var(--brand); background:#eff6ff; }

/* ---------- 空状态 / 其它 ---------- */
.empty { text-align: center; padding: 34px 10px; color: var(--muted); }
.empty .big { font-size: 30px; margin-bottom: 6px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
hr.sep { border: none; border-top: 1px solid var(--line); margin: 16px 0; }
.cat-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 4px 10px; padding: 6px 0;}
.kb-item { border:1px solid var(--line); border-radius:8px; padding:10px 14px; margin-bottom:10px; background:#fff;}
.kb-item .kb-meta { font-size:12px; color: var(--muted); display:flex; gap:10px; flex-wrap:wrap;}

@media (max-width: 860px) {
  .app { display: block; }
  .side { width: 100%; height: auto; position: static; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .side .brand { border-bottom: none; padding: 10px 14px; }
  .side nav { display: flex; flex-wrap: wrap; gap: 2px; padding: 6px 10px; }
  .side nav a { padding: 5px 9px; margin: 0; font-size: 12.5px; }
  .side .side-foot { display: none; }
  .wrap { padding: 14px 12px 30px; }
  .topbar { padding: 8px 12px; }
  .c-top .menu { overflow-x: auto; max-width: 100%; }
  .c-top .menu a { white-space: nowrap; }
}

/* 测试接口 loading 转圈 */
.spinner { display: inline-block; width: 1em; height: 1em; border: 2px solid rgba(0,0,0,.15); border-top-color: currentColor; border-radius: 50%; animation: hwz-spin .7s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes hwz-spin { to { transform: rotate(360deg); } }

/* 写文章表单自动保存状态 */
.draft-state { font-size: 12px; color: var(--muted); white-space: nowrap; }
.draft-state.saved { color: #16a34a; }
.draft-state.fail { color: #dc2626; }

/* 后台设置：图库 Key 状态与申请步骤 */
.key-status { display:inline-block; margin-top:6px; padding:1px 9px; border-radius:10px; font-size:11px; font-weight:600; background:#f3f4f6; color:#6b7280; }
.key-status.ok { background:#dcfce7; color:#166534; }
.key-status.warn { background:#fef3c7; color:#92400e; }
details.setup-help { margin-top:12px; background:#f8fafc; border:1px dashed var(--line); border-radius:10px; padding:10px 14px; font-size:13px; }
details.setup-help summary { cursor:pointer; font-weight:600; color:var(--brand); }
details.setup-help summary:hover { text-decoration:underline; }
details.setup-help h4 { margin:12px 0 4px; font-size:13px; }
details.setup-help ol, details.setup-help ul { margin:4px 0 8px; padding-left:20px; line-height:1.9; }
details.setup-help a { color: var(--brand); }