:root {
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --surface-2: #F2F4F7;
  --surface-3: #E9ECF2;
  --line: #E3E7EE;
  --line-2: #D2D8E3;
  --ink: #1A1F2C;
  --ink-2: #5A6273;
  --ink-3: #909AAC;
  --brand: #1F5FCC;
  --brand-2: #E8F0FE;
  --brand-3: #4A86E8;
  --up: #D93B3B;
  --up-bg: #FDECEC;
  --down: #12A05C;
  --down-bg: #E7F7EF;
  --warn: #E08A0C;
  --warn-bg: #FEF4E2;
  --purple: #6A5AE0;
  --purple-bg: #EEECFD;
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 14px;
  --shadow: 0 1px 2px rgba(26,31,44,.04), 0 4px 16px rgba(26,31,44,.05);
  --shadow-lg: 0 2px 8px rgba(26,31,44,.06), 0 12px 32px rgba(26,31,44,.08);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0; }
button { font-family: inherit; }

.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---------- top bar ---------- */
.topbar {
  height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar .logo {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600;
  flex-shrink: 0;
}
.topbar .tb-title { font-size: 15px; font-weight: 600; }
.topbar .tb-sub { font-size: 12px; color: var(--ink-3); }
.topbar .spacer { flex: 1; }

.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--ink-2);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  transition: all .15s;
}
.back-link:hover { border-color: var(--line-2); color: var(--ink); }

.tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--surface-2);
  color: var(--ink-2);
  white-space: nowrap;
}
.tag.demo { background: var(--warn-bg); color: var(--warn); }
.tag.brand { background: var(--brand-2); color: var(--brand); }
.tag.ok { background: var(--down-bg); color: var(--down); }
.tag.bad { background: var(--up-bg); color: var(--up); }
.tag.purple { background: var(--purple-bg); color: var(--purple); }

/* ---------- layout ---------- */
.wrap { max-width: 1280px; margin: 0 auto; padding: 24px; }
.wrap-narrow { max-width: 1080px; margin: 0 auto; padding: 24px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}
.card-hd {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
}
.card-hd h3 { font-size: 14px; }
.card-bd { padding: 20px; }

.grid { display: grid; gap: 16px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.btn:hover { border-color: var(--ink-3); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: #1a52b3; border-color: #1a52b3; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn.sm { padding: 5px 11px; font-size: 12px; }
.btn.lg { padding: 11px 22px; font-size: 14px; }

/* ---------- metric ---------- */
.metric {
  background: var(--surface-2);
  border-radius: var(--r);
  padding: 14px 16px;
}
.metric .lbl { font-size: 12px; color: var(--ink-2); margin-bottom: 6px; }
.metric .val { font-size: 24px; font-weight: 600; font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.metric .sub { font-size: 12px; color: var(--ink-3); margin-top: 4px; }

/* ---------- table ---------- */
table.tb { width: 100%; border-collapse: collapse; font-size: 13px; }
table.tb th {
  text-align: left;
  font-weight: 500;
  font-size: 12px;
  color: var(--ink-2);
  padding: 9px 12px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.tb td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
table.tb tbody tr:hover { background: #FAFBFD; }
table.tb tbody tr:last-child td { border-bottom: none; }
.t-r { text-align: right; }
.t-c { text-align: center; }

/* ---------- misc ---------- */
.muted { color: var(--ink-2); }
.dim { color: var(--ink-3); }
.fs12 { font-size: 12px; }
.fs13 { font-size: 13px; }
.up { color: var(--up); }
.down { color: var(--down); }
.row { display: flex; align-items: center; gap: 10px; }
.col { display: flex; flex-direction: column; }

.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; display: inline-block; }

.pill-steps { display: flex; align-items: center; gap: 0; }
.pill-steps .st {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--ink-3);
}
.pill-steps .st .n {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--surface-3); color: var(--ink-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600;
  flex-shrink: 0;
  transition: all .3s;
}
.pill-steps .st.active .n { background: var(--brand); color: #fff; }
.pill-steps .st.active { color: var(--ink); }
.pill-steps .st.done .n { background: var(--down); color: #fff; }
.pill-steps .st.done { color: var(--ink-2); }
.pill-steps .bar { width: 32px; height: 1px; background: var(--line-2); margin: 0 10px; }

.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: sk 1.2s infinite;
  border-radius: 4px;
}
@keyframes sk { 0% { background-position: 200% 0 } 100% { background-position: -200% 0 } }

.fade-in { animation: fi .35s ease both; }
@keyframes fi { from { opacity: 0; transform: translateY(6px) } to { opacity: 1; transform: none } }

.spin {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: sp .7s linear infinite;
}
@keyframes sp { to { transform: rotate(360deg) } }

.empty {
  padding: 48px 20px;
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
}

.hint {
  background: var(--brand-2);
  border-left: 3px solid var(--brand-3);
  padding: 10px 14px;
  border-radius: var(--r-sm);
  font-size: 12px;
  color: #1a4a9e;
  line-height: 1.65;
}

.sec-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  letter-spacing: .04em;
  margin-bottom: 10px;
}

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }
::-webkit-scrollbar-track { background: transparent; }