:root {
  --bg: #0b0f14;
  --surface: #121820;
  --surface-2: #1a222d;
  --border: #2a3544;
  --text: #e8eef6;
  --muted: #9aa8b8;
  --accent: #5b9fd4;
  --accent-soft: rgba(91, 159, 212, 0.15);
  --good: #3dba8a;
  --bad: #e07a6a;
  --warn: #d4a84b;
  --radius: 12px;
  --max: 860px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.25rem 4rem;
}

header.site {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 20, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { text-decoration: none; color: var(--accent); }
.nav-meta { color: var(--muted); font-size: 0.85rem; }

h1 {
  font-size: clamp(1.55rem, 4vw, 2rem);
  line-height: 1.25;
  margin: 1.5rem 0 0.6rem;
  font-weight: 700;
}
h2 {
  font-size: 1.25rem;
  margin: 2.4rem 0 0.85rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border);
  color: var(--text);
}
h3 {
  font-size: 1.05rem;
  margin: 1.6rem 0 0.6rem;
  color: var(--text);
}
.lead {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 1.5rem;
}
.badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin: 1rem 0 1.4rem;
}
.callout strong { color: var(--text); }

.figure {
  margin: 1.25rem 0 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.figure img {
  display: block;
  width: 100%;
  height: auto;
  background: #0a0e13;
}
.figure figcaption {
  padding: 0.65rem 0.9rem;
  font-size: 0.82rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.table-wrap {
  overflow-x: auto;
  margin: 0.8rem 0 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 520px;
}
th, td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: none;
  letter-spacing: 0.01em;
}
tr:last-child td { border-bottom: none; }
td strong { color: var(--text); }

.metric {
  font-size: 0.88rem;
  color: var(--muted);
}
.metric b { color: var(--text); font-weight: 600; }

.tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 0.12rem 0.45rem;
  border-radius: 6px;
  margin-right: 0.35rem;
  vertical-align: middle;
}
.tag.good { background: rgba(61,186,138,0.18); color: var(--good); }
.tag.bad { background: rgba(224,122,106,0.18); color: var(--bad); }
.tag.warn { background: rgba(212,168,75,0.18); color: var(--warn); }
.tag.neutral { background: rgba(154,168,184,0.15); color: var(--muted); }

.report-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}
.report-list li {
  margin: 0 0 0.75rem;
}
.report-card {
  display: block;
  padding: 1.1rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}
.report-card:hover {
  border-color: var(--accent);
  background: var(--surface-2);
  text-decoration: none;
}
.report-card h2 {
  margin: 0 0 0.35rem;
  border: none;
  padding: 0;
  font-size: 1.1rem;
}
.report-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.report-card .meta {
  margin-top: 0.55rem;
  font-size: 0.78rem;
  color: var(--muted);
}

ul.plain {
  padding-left: 1.2rem;
  margin: 0.5rem 0 1rem;
}
ul.plain li { margin: 0.35rem 0; }

footer.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}
.disclaimer {
  margin-top: 2rem;
  padding: 0.9rem 1rem;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .wrap { padding: 1rem 0.9rem 3rem; }
  th, td { padding: 0.55rem 0.65rem; }
}