:root { font-family: "Microsoft YaHei", Arial, sans-serif; color: #172033; background: #eef1f5; }
* { box-sizing: border-box; }
body { margin: 0; }
.topbar { height: 58px; padding: 0 max(18px, calc((100% - 820px) / 2)); display: flex; align-items: center; gap: 14px; color: #d7dde7; background: #172033; font-size: 14px; }
.brand-mark { color: white; font-size: 18px; font-weight: 800; }
.page { width: min(820px, calc(100% - 28px)); margin: 30px auto 60px; }
.intro { margin-bottom: 24px; }
.eyebrow { margin: 0 0 8px; color: #cf3f31; font-size: 13px; font-weight: 700; }
h1 { margin: 0 0 8px; font-size: 30px; }
.subtitle { margin: 0; color: #647083; }
.summary { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 18px; padding: 20px 24px; color: white; background: #26344b; border-radius: 6px; }
.summary div { display: flex; flex-direction: column; gap: 5px; }
.summary .label { color: #bac4d3; font-size: 13px; }
.summary strong { font-size: 19px; }
.search { padding: 20px 24px; background: white; border: 1px solid #dce1e8; border-radius: 6px; }
.search label { display: block; font-weight: 600; margin-bottom: 8px; }
select { width: 100%; margin-bottom: 18px; padding: 12px; border: 1px solid #d1d5db; border-radius: 4px; color: #172033; background: white; font-size: 16px; }
.row { display: flex; gap: 8px; }
input { flex: 1; min-width: 0; padding: 12px; border: 1px solid #d1d5db; border-radius: 4px; font-size: 16px; text-transform: uppercase; }
button { padding: 12px 22px; border: 0; border-radius: 4px; color: white; background: #cf3f31; font-size: 16px; cursor: pointer; }
.result { display: grid; gap: 12px; margin-top: 18px; line-height: 1.65; }
.fault-card { padding: 22px 24px; background: white; border: 1px solid #dce1e8; border-left: 4px solid #cf3f31; border-radius: 6px; }
.fault-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.fault-code { font-family: Consolas, monospace; font-size: 21px; font-weight: 800; }
.status { padding: 4px 8px; border-radius: 4px; font-size: 12px; white-space: nowrap; }
.warning { color: #8b261e; background: #fde9e7; }
.neutral { color: #4d596b; background: #edf0f4; }
.fault-card h2 { margin: 16px 0 7px; font-size: 18px; }
.fault-card p { margin: 7px 0; }
.cost { color: #4d596b; font-size: 14px; }
.notice { color: #92400e; background: #fffbeb; padding: 12px; border-radius: 4px; }
.empty { color: #647083; }
.loading { margin: 0; padding: 12px; color: #4d596b; background: #e4ebf5; border-radius: 4px; }
.safety { color: #8b261e; font-weight: 700; }
.disclaimer { margin: 20px 4px 0; color: #768194; font-size: 12px; line-height: 1.6; }

@media (max-width: 560px) {
  .page { margin-top: 22px; }
  h1 { font-size: 25px; }
  .summary { grid-template-columns: 1fr; gap: 16px; }
  .row { flex-direction: column; }
  button { width: 100%; }
  .fault-heading { align-items: flex-start; }
}