:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #142033;
  --muted: #64748b;
  --line: #dbe3ef;
  --primary: #0f172a;
  --primary2: #1e293b;
  --ok: #0f766e;
  --warn: #b45309;
  --bad: #b91c1c;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.10);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: radial-gradient(circle at top left, #e0f2fe, transparent 34%), var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}
.id, .zh { display: block; }
.id { font-weight: 760; }
.zh { color: var(--muted); font-size: 0.92em; margin-top: 2px; }
.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  max-width: 1080px;
  margin: 0 auto;
  padding: calc(28px + env(safe-area-inset-top)) 18px 18px;
}

.brandLogo {
  flex: 0 0 auto;
  width: clamp(92px, 13vw, 148px);
  border-radius: 24px;
  overflow: hidden;
  background: #020617;
  box-shadow: 0 18px 55px rgba(14, 165, 233, 0.28), 0 10px 30px rgba(15, 23, 42, 0.22);
  border: 1px solid rgba(103, 232, 249, 0.26);
  animation: logoGlow 3.6s ease-in-out infinite;
}
.brandLogo img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.heroText { min-width: 0; flex: 1 1 auto; }
@keyframes logoGlow {
  0%, 100% { box-shadow: 0 18px 55px rgba(14, 165, 233, 0.22), 0 10px 30px rgba(15, 23, 42, 0.20); }
  50% { box-shadow: 0 20px 70px rgba(250, 204, 21, 0.26), 0 10px 34px rgba(14, 165, 233, 0.28); }
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--ok);
  letter-spacing: 0.02em;
}
.eyebrow .zh { color: var(--ok); opacity: 0.78; }
h1 { margin: 0; font-size: clamp(28px, 5vw, 50px); line-height: 1.08; }
h1 .zh { color: var(--primary2); font-size: 0.66em; }
.subtitle { margin: 10px 0 0; color: var(--muted); font-size: 18px; max-width: 780px; }
.subtitle .id { font-weight: 700; color: var(--primary2); }
.badge {
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow);
}
.layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 18px;
}
.card {
  background: rgba(255,255,255,0.94);
  border: 1px solid rgba(219, 227, 239, 0.88);
  border-radius: 22px;
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}
.full { grid-column: 1 / -1; }
h2 { margin: 0 0 14px; font-size: 22px; }
h2 .zh { color: var(--primary2); font-size: 0.82em; }
.row { display: grid; gap: 14px; margin-bottom: 14px; }
.row.two { grid-template-columns: 1fr 1fr; }
.labelText { display: block; color: var(--muted); margin-bottom: 8px; }
.labelText .id { color: var(--primary2); }
.labelText .zh { color: var(--muted); }
select, input {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0 14px;
  font-size: 17px;
  background: #fff;
  color: var(--text);
  outline: none;
}
select:focus, input:focus { border-color: #38bdf8; box-shadow: 0 0 0 4px rgba(56,189,248,.14); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
button {
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 800;
  font-size: 16px;
  cursor: pointer;
  color: #fff;
  background: var(--primary);
  touch-action: manipulation;
}
button .zh { color: rgba(255,255,255,.78); font-size: 0.86em; }
button.secondary { background: var(--ok); }
button.ghost { background: #e2e8f0; color: var(--primary2); }
button.ghost .zh { color: var(--muted); }
button.sample {
  text-align: left;
  background: #f8fafc;
  color: var(--primary2);
  border: 1px solid var(--line);
  font-weight: 700;
}
button.sample .zh { color: var(--muted); }
button:active { transform: translateY(1px); }
.result {
  margin-top: 18px;
  padding: 18px;
  border-radius: 18px;
  background: #f8fafc;
  border: 1px solid var(--line);
  min-height: 98px;
}
.result strong { font-size: 30px; display: block; margin: 4px 0; }
.result .unit { color: var(--ok); display: inline; }
.result .detail { color: var(--muted); margin: 7px 0 0; }
.result.error { border-color: #fecaca; background: #fef2f2; color: var(--bad); }
.result.error .zh { color: #991b1b; }
.muted { color: var(--muted); }
.hidden { display: none; }
.tips p, .note p { margin: 0 0 10px; }
.tips b { color: var(--primary2); }
.tips .range { color: var(--muted); font-size: 15px; }

.tips .tipBlock {
  padding: 12px 0;
  border-top: 1px dashed var(--line);
}
.tips .tipBlock:first-child { border-top: 0; padding-top: 0; }
.tips .tipTitle { margin-bottom: 6px; }
.tips ul { margin: 8px 0 0; padding-left: 18px; }
.tips li { margin-bottom: 8px; }
.tips li .id, .tips li .zh { display: inline; }
.tips details {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f8fafc;
}
.tips summary { cursor: pointer; font-weight: 800; color: var(--primary2); }
.tips summary .zh { display: block; color: var(--muted); font-size: .92em; margin-top: 2px; }
.refgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 6px 18px calc(30px + env(safe-area-inset-bottom));
  color: var(--muted);
}
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; padding: 12px; }
  .row.two { grid-template-columns: 1fr; }
  .refgrid { grid-template-columns: 1fr; }
  .hero { align-items: center; padding-left: 14px; padding-right: 14px; gap: 12px; }
  .brandLogo { width: 86px; border-radius: 18px; }
  .card { padding: 18px; border-radius: 18px; }
  .actions button { flex: 1 1 120px; }
}
@media (max-width: 420px) {
  .badge { display: none; }
  .brandLogo { width: 72px; border-radius: 16px; }
  select, input { font-size: 16px; }
  .result strong { font-size: 26px; }
}