:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f4f6fb;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --success: #16a34a;
  --error: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1080px; margin: 0 auto; padding: 24px 16px; }
h1 { font-size: 24px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 24px 0 12px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.nav {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 16px;
}
.nav .brand { font-weight: 700; margin-right: auto; }
.nav a { padding: 6px 12px; border-radius: 8px; color: var(--muted); }
.nav a:hover { background: var(--bg); text-decoration: none; color: var(--text); }
.nav a.active { background: var(--primary); color: #fff; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
th { background: #f8fafc; font-weight: 600; color: var(--muted); }
tr:hover td { background: #fafbff; }

.btn {
  display: inline-block; padding: 8px 16px; border-radius: 8px;
  border: 1px solid var(--border); background: #fff; color: var(--text);
  cursor: pointer; font-size: 14px;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-danger { color: var(--error); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }

.form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 13px; color: var(--muted); }
input, select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; min-width: 160px;
}
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat .num { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat .label { font-size: 13px; color: var(--muted); }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #ecfdf5; color: var(--success); border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: var(--error); border: 1px solid #fecaca; }
.alert-info { background: #eff6ff; color: var(--primary); border: 1px solid #bfdbfe; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.tag-custom { background: #fef3c7; color: #b45309; }
.tag-api { background: #e0f2fe; color: #0369a1; }

.muted { color: var(--muted); font-size: 13px; }
.pill { display:inline-flex; gap:6px; }
.right { text-align: right; }
.flex { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* ===== 实时汇率刷新状态条（首页/换算页共用） ===== */
.live-status { display:flex; align-items:center; gap:8px; font-size:13px; color:#374151; margin-bottom:16px; }
.live-status .dot { width:9px; height:9px; border-radius:50%; display:inline-block; }
.live-status .dot-on { background:#22c55e; box-shadow:0 0 0 3px rgba(34,197,94,.18); }
.live-status .dot-off { background:#ef4444; box-shadow:0 0 0 3px rgba(239,68,68,.18); }
.live-status .live-updated { color:#6b7280; margin-left:auto; }
.live-status .live-updated.flash { color:#16a34a; font-weight:600; transition:color .2s; }