:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1a2233;
  --muted: #6b7688;
  --primary: #4f6ef7;
  --primary-dark: #3d55d6;
  --success: #16a34a;
  --danger: #dc2626;
  --warn: #d97706;
  --border: #e5e9f2;
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh;
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px; background: var(--card); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.nav .logo { font-size: 20px; font-weight: 700; color: var(--primary); text-decoration: none; }
.nav .links a { color: var(--muted); text-decoration: none; margin-left: 24px; font-size: 14px; }
.nav .links a:hover { color: var(--primary); }
.container { max-width: 1080px; margin: 0 auto; padding: 32px 20px 64px; }
.hero { text-align: center; padding: 40px 0 28px; }
.hero h1 { font-size: 30px; margin-bottom: 10px; }
.hero p { color: var(--muted); font-size: 15px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; margin-top: 28px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; gap: 12px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 8px 24px rgba(79,110,247,.10); transform: translateY(-2px); }
.card .pname { font-size: 18px; font-weight: 600; }
.card .pdesc { color: var(--muted); font-size: 13px; min-height: 34px; line-height: 1.5; }
.card .meta { display: flex; justify-content: space-between; align-items: baseline; }
.card .price { font-size: 24px; font-weight: 700; color: var(--primary); }
.card .price small { font-size: 13px; color: var(--muted); font-weight: 400; }
.tag { display: inline-block; font-size: 12px; padding: 3px 10px; border-radius: 20px; background: #eef2ff; color: var(--primary); }
.tag.gray { background: #f1f3f7; color: var(--muted); }
.tag.ok { background: #e8f7ee; color: var(--success); }
.tag.warn { background: #fef3e2; color: var(--warn); }
.tag.danger { background: #fdecec; color: var(--danger); }
.btn {
  display: inline-block; border: none; cursor: pointer; border-radius: 10px;
  padding: 10px 20px; font-size: 14px; font-weight: 600; text-decoration: none; text-align: center;
  background: var(--primary); color: #fff; transition: background .15s;
}
.btn:hover { background: var(--primary-dark); }
.btn.ghost { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn.ghost:hover { background: #eef2ff; }
.btn:disabled { background: #b9c2f5; cursor: not-allowed; }
.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px;
}
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px;
  font-size: 14px; outline: none; background: #fff; color: var(--text); font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--primary); }
.pay-type { display: flex; gap: 12px; }
.pay-type label {
  flex: 1; border: 1px solid var(--border); border-radius: 10px; padding: 12px;
  text-align: center; cursor: pointer; font-size: 14px; color: var(--muted);
}
.pay-type input { display: none; }
.pay-type label.on { border-color: var(--primary); background: #eef2ff; color: var(--primary); font-weight: 600; }
.msg { padding: 12px 16px; border-radius: 10px; font-size: 14px; margin: 12px 0; display: none; }
.msg.err { background: #fdecec; color: var(--danger); display: block; }
.msg.ok { background: #e8f7ee; color: var(--success); display: block; }
.kv { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.kv span:first-child { color: var(--muted); }
.key-box {
  font-family: Consolas, monospace; font-size: 18px; letter-spacing: 1px;
  background: #f0f3ff; border: 1px dashed var(--primary); color: var(--primary);
  padding: 14px; border-radius: 10px; text-align: center; user-select: all; margin: 8px 0;
}
.muted { color: var(--muted); font-size: 13px; }
.center { text-align: center; }
footer { text-align: center; color: #b0b8c7; font-size: 12px; padding: 30px 0; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
table.tbl th, table.tbl td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; }
table.tbl th { color: var(--muted); font-weight: 500; background: #fafbfd; }
.mono { font-family: Consolas, monospace; }
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 24px; flex-wrap: wrap; }
.tabs button {
  border: none; background: none; padding: 12px 18px; font-size: 14px; cursor: pointer;
  color: var(--muted); border-bottom: 2px solid transparent; font-family: inherit;
}
.tabs button.on { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat .num { font-size: 26px; font-weight: 700; }
.stat .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; }
.spin {
  width: 36px; height: 36px; border: 3px solid #dfe4f5; border-top-color: var(--primary);
  border-radius: 50%; animation: sp 1s linear infinite; margin: 24px auto;
}
@keyframes sp { to { transform: rotate(360deg); } }
@media (max-width: 640px) {
  .container { padding: 20px 14px 48px; }
  .nav { padding: 14px 16px; }
  .nav .links a { margin-left: 14px; }
}