:root {
  color-scheme: light;
  --ink: #10212b;
  --muted: #60717a;
  --line: #dce5e8;
  --paper: #f5f8f8;
  --card: #ffffff;
  --accent: #087f6f;
  --accent-soft: #e1f3ef;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0 auto; max-width: 1200px; padding: 28px; background: var(--paper); color: var(--ink); }
.hero { display: flex; justify-content: space-between; align-items: end; gap: 24px; padding: 28px; border-radius: 20px; background: linear-gradient(135deg, #12343b, #087f6f); color: white; }
.eyebrow { margin: 0 0 8px; font-size: 12px; letter-spacing: .18em; opacity: .72; }
h1 { margin: 0; font-size: clamp(30px, 5vw, 52px); }
.hero p:last-child { margin-bottom: 0; opacity: .82; }
.research-badge { white-space: nowrap; padding: 9px 13px; border: 1px solid #ffffff55; border-radius: 999px; font-size: 13px; }
nav { display: flex; gap: 8px; margin: 20px 0; }
button { border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px; background: var(--card); color: var(--ink); cursor: pointer; }
button.active { background: var(--accent); border-color: var(--accent); color: white; }
main { min-height: 520px; }
h2 { margin: 28px 0 8px; font-size: 28px; }
.conclusion { margin: 0 0 18px; color: #29434b; line-height: 1.75; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.card, .panel { background: var(--card); border: 1px solid var(--line); border-radius: 14px; }
.card { display: grid; gap: 8px; padding: 16px; }
.card span, .card small { color: var(--muted); }
.card strong { font-size: 23px; }
.panel { margin-top: 16px; padding: 18px; }
.panel h3 { margin: 0 0 14px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 9px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
.warnings { margin: 0; padding-left: 22px; color: #7b4b00; line-height: 1.7; }
.quality, .empty { color: var(--muted); font-size: 13px; }
.error { padding: 20px; border-radius: 12px; background: #fff0f0; color: #9b1c1c; }
footer { margin: 32px 0 10px; color: var(--muted); font-size: 13px; }
@media (max-width: 640px) {
  body { padding: 14px; }
  .hero { align-items: start; flex-direction: column; }
  nav { overflow-x: auto; }
}