:root {
  --ink: #0b1f3a;
  --text: #111827;
  --muted: #4b5563;
  --line: #d5dbe3;
  --bg: #f5f7fa;
  --card: #ffffff;
  --brand: #b84500;
  --brand-fill: #ff6600;
  --ok: #065f46;
  --ok-bg: #ecfdf5;
  --err: #991b1b;
  --err-bg: #fef2f2;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--brand); }
.top { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 16px 28px; background: var(--ink); color: #fff; }
.top .brand { color: #fff; font-weight: 700; text-decoration: none; }
.top nav { display: flex; gap: 8px; flex-wrap: wrap; }
.top nav a { color: #ffb366; text-decoration: none; padding: 6px 10px; border-radius: 6px; }
.top nav a.on { background: rgba(255,255,255,.12); color: #fff; }
main { max-width: 1080px; margin: 0 auto; padding: 28px 20px 64px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 28px; }
.card.narrow { max-width: 480px; margin: 8vh auto; }
.eyebrow { margin: 0; color: var(--brand); font: 600 12px/1.4 ui-monospace, Consolas, monospace; letter-spacing: .08em; }
h1 { margin: 8px 0 0; color: var(--ink); font-size: 28px; }
h2 { margin: 28px 0 0; color: var(--ink); font-size: 18px; }
.lead, .meta { color: var(--muted); }
.row { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 22px; }
.stat { display: block; padding: 18px; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; }
.stat b { display: block; color: var(--ink); font-size: 22px; }
.stat span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }
label { display: block; margin-top: 16px; font-size: 14px; font-weight: 650; color: var(--ink); }
label span, .meta { display: block; margin-top: 4px; font-size: 12px; font-weight: 400; }
input, textarea, select { width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid #7c8594; border-radius: 8px; font: inherit; color: var(--text); background: #fff; }
button, .btn { display: inline-block; margin-top: 18px; padding: 10px 16px; border: 0; border-radius: 8px; background: var(--brand-fill); color: var(--ink); font: 650 14px/1 inherit; text-decoration: none; cursor: pointer; }
button.ghost { background: #fff; border: 1px solid #7c8594; }
.error, .ok { padding: 10px 12px; border-radius: 8px; }
.error { background: var(--err-bg); color: var(--err); }
.ok { background: var(--ok-bg); color: var(--ok); }
table { width: 100%; border-collapse: collapse; margin-top: 18px; }
th, td { padding: 12px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: 12px; color: var(--muted); }
@media (max-width: 720px) {
  .row, .split, .stats, .top { display: block; }
  .top nav { margin-top: 10px; }
  .stat { margin-top: 10px; }
}