:root {
  --bg: #fafbfc;
  --panel: #ffffff;
  --ink: #15171c;
  --ink-2: #4b5262;
  --muted: #7d8595;
  --line: #e7e9ef;
  --line-soft: #f0f2f6;
  --accent: #2f6df6;
  --new: #16a34a;
  --new-bg: #e9f8ee;
  --hot: #b45309;
  --hot-bg: #fdf3e3;
  --drop: #64748b;
  --drop-bg: #f1f4f8;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -16px rgba(16, 24, 40, .18);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --panel: #161a21;
    --ink: #eef1f6;
    --ink-2: #b9c0cd;
    --muted: #8d95a5;
    --line: #262c36;
    --line-soft: #1d222a;
    --new: #4ade80;
    --new-bg: #12291b;
    --hot: #fbbf24;
    --hot-bg: #2b2009;
    --drop: #94a3b8;
    --drop-bg: #1a2029;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── topbar ─────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: .01em; }
.brand-mark {
  display: grid; place-items: center;
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--ink); color: var(--bg);
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
}
.topnav { display: flex; gap: 4px; font-size: 14px; }
.topnav a {
  padding: 6px 12px; border-radius: 999px; color: var(--ink-2);
  transition: background .15s ease, color .15s ease;
}
.topnav a:hover { background: var(--line-soft); color: var(--ink); }
.topnav a.is-active { background: var(--panel); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }

/* ── layout ─────────────────────────────────────────────── */
.wrap { max-width: 1040px; margin: 0 auto; padding: 40px 24px 72px; }

.eyebrow {
  margin: 0 0 8px;
  font-size: 11px; font-weight: 650; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted);
}

.hero h1 { margin: 0 0 10px; font-size: clamp(28px, 4vw, 40px); line-height: 1.15; letter-spacing: -.02em; }
.lede { margin: 0; max-width: 62ch; color: var(--ink-2); }
.lede strong { color: var(--ink); font-weight: 600; }

/* ── controls ───────────────────────────────────────────── */
.controls {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-top: 22px;
}
.segmented {
  display: inline-flex; padding: 3px; gap: 2px;
  background: var(--line-soft); border-radius: 999px;
}
.segmented button {
  appearance: none; border: 0; cursor: pointer;
  padding: 7px 20px; border-radius: 999px;
  background: transparent; color: var(--ink-2);
  font: inherit; font-size: 14px; font-weight: 550;
  transition: background .15s ease, color .15s ease, box-shadow .15s ease;
}
.segmented button:hover { color: var(--ink); }
.segmented button[aria-selected="true"] {
  background: var(--panel); color: var(--ink);
  box-shadow: 0 1px 3px rgba(16, 24, 40, .1);
}
.controls-meta { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ── kpi ────────────────────────────────────────────────── */
.kpis {
  display: grid; gap: 12px; margin: 28px 0 8px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.kpi {
  padding: 16px 18px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.kpi-label { font-size: 12.5px; color: var(--muted); }
.kpi-value {
  margin-top: 4px; font-size: 30px; font-weight: 650;
  letter-spacing: -.02em; font-variant-numeric: tabular-nums; line-height: 1.1;
}
.kpi-hint { margin-top: 2px; font-size: 12px; color: var(--muted); }
.kpi--new .kpi-value { color: var(--new); }
.kpi--hot .kpi-value { color: var(--hot); }
.kpi--drop .kpi-value { color: var(--drop); }

.notice {
  margin: 20px 0 0; padding: 12px 16px;
  background: var(--panel); border: 1px dashed var(--line);
  border-radius: var(--radius); color: var(--ink-2); font-size: 13.5px;
}

/* ── blocks ─────────────────────────────────────────────── */
.block {
  margin-top: 34px; padding-top: 26px;
  border-top: 1px solid var(--line);
}
.block-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 14px;
}
.block-head h2 { margin: 0; font-size: 20px; letter-spacing: -.01em; }
.block-sub { margin: 0; color: var(--muted); font-size: 13px; }

.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }

.item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 14px; align-items: start;
  padding: 14px 16px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color .15s ease, transform .15s ease;
}
.item:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.rank {
  font-variant-numeric: tabular-nums; font-weight: 650;
  font-size: 15px; color: var(--muted); padding-top: 2px;
}
.item-main { min-width: 0; }
.name {
  display: inline-block; font-weight: 620; letter-spacing: -.01em;
  word-break: break-word;
}
.name:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.desc { margin: 4px 0 0; color: var(--ink-2); font-size: 13.5px; }
.meta {
  margin-top: 8px; display: flex; flex-wrap: wrap; align-items: center;
  gap: 6px 10px; font-size: 12.5px; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.dot-sep::before { content: "·"; margin-right: 10px; opacity: .5; }

.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .01em;
  border: 1px solid transparent;
}
.badge--new { color: var(--new); background: var(--new-bg); }
.badge--hot { color: var(--hot); background: var(--hot-bg); }
.badge--drop { color: var(--drop); background: var(--drop-bg); }
.badge--lang { color: var(--ink-2); background: var(--line-soft); font-weight: 550; }
.badge--up { color: var(--new); background: var(--new-bg); }
.badge--down { color: var(--drop); background: var(--drop-bg); }

.list--muted .item { background: transparent; border-style: dashed; }
.list--muted .name { color: var(--ink-2); }
.list--muted .desc { opacity: .75; }

.empty {
  margin: 0; padding: 30px 20px; text-align: center;
  color: var(--muted); font-size: 13.5px;
  border: 1px dashed var(--line); border-radius: var(--radius);
}

/* ── foot ───────────────────────────────────────────────── */
.foot {
  margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line);
  color: var(--ink-2); font-size: 12.5px;
}
.foot p { margin: 0 0 6px; }
.foot-dim { color: var(--muted); }

@media (max-width: 560px) {
  .wrap { padding: 28px 16px 56px; }
  .topbar { padding: 10px 16px; }
  .item { grid-template-columns: 34px minmax(0, 1fr); }
  .item > .badge { grid-column: 2; justify-self: start; }
}