:root{
  --bg:#f6f7fb;
  --panel:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:rgba(15,23,42,.10);
  --shadow:0 10px 30px rgba(2,6,23,.08);
  --radius:16px;

  --primary:#2563eb;
  --success:#16a34a;

  --danger-bg:#fef2f2; --danger-bd:rgba(220,38,38,.25); --danger-tx:#991b1b;
  --warn-bg:#fffbeb;   --warn-bd:rgba(217,119,6,.25);  --warn-tx:#92400e;
  --info-bg:#eff6ff;   --info-bd:rgba(37,99,235,.22);  --info-tx:#1e40af;
  --ok-bg:#f0fdf4;     --ok-bd:rgba(22,163,74,.22);    --ok-tx:#166534;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height:1.5;
}
.topbar-right{display:flex;align-items:center;gap:10px}
a{color:inherit;text-decoration:none}
.wrap{max-width:1040px;margin:0 auto;padding:24px}

.topbar{
  position:sticky;top:0;z-index:10;
  background:rgba(246,247,251,.85);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--border);
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px}
.brand{font-weight:800;letter-spacing:.2px}
.topbar-hint{color:var(--muted);font-size:13px}

.hero{padding:14px 0 6px}
.hero h1{margin:0;font-size:28px;letter-spacing:.2px}
.hero p{margin:8px 0 0;color:var(--muted)}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:16px}

.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:16px;
}
.card-link{display:block;transition:transform .12s ease, box-shadow .12s ease}
.card-link:hover{transform:translateY(-1px);box-shadow:0 14px 40px rgba(2,6,23,.10)}
.card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.card-title{font-weight:700}
.desc{color:var(--muted);font-size:13px;margin-top:8px}
.price{margin-top:10px;font-size:18px;font-weight:800}

.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  background:#f1f5f9;color:#334155;font-size:12px;border:1px solid rgba(15,23,42,.06);
}
.pill.ok{background:var(--ok-bg);border-color:var(--ok-bd);color:var(--ok-tx)}
.pill.warn{background:var(--warn-bg);border-color:var(--warn-bd);color:var(--warn-tx)}
.pill.danger{background:var(--danger-bg);border-color:var(--danger-bd);color:var(--danger-tx)}
.pill.info{background:var(--info-bg);border-color:var(--info-bd);color:var(--info-tx)}

.layout{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;margin-top:16px}
@media (max-width: 900px){ .layout{grid-template-columns:1fr;} }

.h2{margin:0 0 10px;font-size:16px}
.prose{color:var(--muted);font-size:14px;white-space:pre-wrap}

.field{display:flex;flex-direction:column;gap:6px;margin-top:12px}
.label{font-size:13px;color:#334155}
.input,.textarea{
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 12px;
  font-size:14px;
  background:#fff;
  outline:none;
}
.input:focus,.textarea:focus{
  border-color:rgba(37,99,235,.45);
  box-shadow:0 0 0 4px rgba(37,99,235,.10);
}
.help{font-size:12px;color:var(--muted)}

.btnrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:12px;
  border:1px solid var(--border);
  background:#fff;cursor:pointer;
  font-weight:700;font-size:14px;
}
.btn.primary{background:var(--primary);border-color:transparent;color:#fff}
.btn.success{background:var(--success);border-color:transparent;color:#fff}
.btn.block{width:100%}
.btn:active{transform:translateY(1px)}

.alert{
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  background:#fff;
  margin-bottom:14px;
}
.alert-danger{background:var(--danger-bg);border-color:var(--danger-bd);color:var(--danger-tx)}
.alert-warning{background:var(--warn-bg);border-color:var(--warn-bd);color:var(--warn-tx)}
.alert-info{background:var(--info-bg);border-color:var(--info-bd);color:var(--info-tx)}
.alert-success{background:var(--ok-bg);border-color:var(--ok-bd);color:var(--ok-tx)}
.alert-secondary{background:#f8fafc}

.table{
  width:100%;
  border-collapse:collapse;
  margin-top:10px;
  font-size:14px;
}
.table th,.table td{padding:10px;border-bottom:1px solid var(--border);text-align:left}
.table th{color:#334155;font-weight:700;font-size:13px}

.codebox{
  width:100%;
  min-height:180px;
  resize:vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  background:#0b1220;
  color:#e2e8f0;
  border:1px solid rgba(148,163,184,.25);
  border-radius:14px;
  padding:12px;
}

.footer{margin-top:26px;border-top:1px solid var(--border);color:var(--muted)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 24px}
.muted{color:var(--muted);font-size:13px}