:root {
  --brand: #1D4ED8;
  --brand-2: #2563eb;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --ok: #16a34a;
  --warn: #d97706;
  --shadow: 0 8px 30px rgba(29,78,216,.08);
}
[data-theme="dark"] {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #334155;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
}
* { 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;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; background: var(--card); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; color: var(--brand); display: flex; align-items: center; gap: 8px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--brand); display: inline-block; }
.container { max-width: 1000px; margin: 26px auto; padding: 0 16px; }
.narrow { max-width: 460px; margin-left: auto; margin-right: auto; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 26px; box-shadow: var(--shadow); margin-bottom: 18px;
}
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 14px; }
.muted { color: var(--muted); font-size: 14px; }
label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=password], input[type=tel], select {
  width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text); font-size: 15px; outline: none;
}
input:focus, select:focus { border-color: var(--brand); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--brand); color: #fff; border: 0; border-radius: 10px;
  padding: 11px 18px; font-size: 15px; font-weight: 600; cursor: pointer; transition: .15s;
}
.btn:hover { background: var(--brand-2); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
.btn.block { width: 100%; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.radio-card {
  border: 1.5px solid var(--border); border-radius: 14px; padding: 18px; cursor: pointer;
  background: var(--bg); transition: .15s;
}
.radio-card:hover { border-color: var(--brand); }
.radio-card.active { border-color: var(--brand); background: rgba(29,78,216,.08); }
.radio-card .t { font-weight: 700; font-size: 16px; }
.radio-card .d { font-size: 13px; color: var(--muted); margin-top: 4px; }
.qr-box { text-align: center; padding: 10px 0 4px; }
.qr-box img { width: 240px; height: 240px; object-fit: contain; border: 1px solid var(--border); border-radius: 12px; background: #fff; }
.status-pill { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.status-wait { background: rgba(217,119,6,.12); color: var(--warn); }
.status-ok { background: rgba(22,163,74,.12); color: var(--ok); }
.note { background: rgba(29,78,216,.07); border-left: 3px solid var(--brand); padding: 12px 14px; border-radius: 8px; font-size: 14px; margin: 12px 0; }
.steps { display: flex; gap: 6px; margin: 0 0 20px; flex-wrap: wrap; }
.steps .s { font-size: 12px; color: var(--muted); padding: 4px 10px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); }
.steps .s.on { color: #fff; background: var(--brand); border-color: var(--brand); }
.notice-card { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.kv { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.kv:last-child { border-bottom: 0; }
.kv .k { color: var(--muted); }
.kv .v { font-weight: 600; word-break: break-all; }
.spinner { width: 34px; height: 34px; border: 4px solid var(--border); border-top-color: var(--brand); border-radius: 50%; animation: spin 1s linear infinite; margin: 8px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.err { color: #dc2626; font-size: 14px; margin: 10px 0; }
.theme-btn { background: transparent; border: 1px solid var(--border); border-radius: 9px; padding: 6px 10px; cursor: pointer; color: var(--text); }
.center { text-align: center; }
.mt { margin-top: 16px; }
.tag { font-size: 12px; color: var(--brand); background: rgba(29,78,216,.1); padding: 2px 8px; border-radius: 6px; }

/* ===== 官方注册风格：左标签 / 右内容 ===== */
.form-row { display: flex; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.form-row:last-of-type { border-bottom: 0; }
.form-row > .fl { width: 132px; flex-shrink: 0; font-size: 15px; font-weight: 600; padding-top: 10px; }
.form-row > .fc { flex: 1; min-width: 0; }
.hint { font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.7; }
.inline-radios { display: flex; gap: 32px; padding: 6px 0 2px; flex-wrap: wrap; }
.iradio { display: inline-flex; align-items: center; gap: 9px; cursor: pointer; font-size: 15px; color: var(--text); }
.iradio .dot2 { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid #c9ced6; background: #fff; position: relative; flex-shrink: 0; transition: .15s; }
.iradio.on .dot2 { border-color: var(--brand); }
.iradio.on .dot2::after { content: ""; position: absolute; inset: 3.5px; border-radius: 50%; background: var(--brand); }
.iradio.on { font-weight: 600; }
.sub-block { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 2px 18px; }
.sub-row { display: flex; gap: 16px; padding: 13px 0; }
.sub-row + .sub-row { border-top: 1px dashed var(--border); }
.sub-row .sl { width: 150px; flex-shrink: 0; font-size: 14px; padding-top: 9px; }
@media (max-width: 680px) {
  .form-row { flex-direction: column; gap: 4px; }
  .form-row > .fl { width: auto; padding-top: 0; }
  .sub-row { flex-direction: column; gap: 4px; }
  .sub-row .sl { width: auto; padding-top: 0; }
}