:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #1f2329;
  --muted: #8a909a;
  --border: #e8eaed;
  --accent: #ff5000;
  --accent-soft: #fff0ea;
  --row-hover: #f7f8fa;
  --shadow: 0 2px 8px rgba(0, 0, 0, .06);
}

[data-theme="dark"] {
  --bg: #15171c;
  --panel: #1e2128;
  --text: #e6e8eb;
  --muted: #8b929e;
  --border: #2a2e37;
  --accent: #ff6a33;
  --accent-soft: #3a2418;
  --row-hover: #242832;
  --shadow: 0 2px 8px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  padding: 18px;
}

.float-auto {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
  user-select: none;
  transition: .15s;
}
[data-theme="dark"] .float-auto { background: rgba(30, 33, 40, .92); }
.float-auto:hover { border-color: var(--accent); }
.float-auto input { width: 14px; height: 14px; accent-color: var(--accent); cursor: pointer; }

.mobile-tabs { display: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1600px;
  margin: 0 auto;
  height: calc(100vh - 36px);
  align-items: stretch;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .15s, box-shadow .15s;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card.flash { animation: flash .9s ease; }
@keyframes flash {
  0% { box-shadow: 0 0 0 0 var(--accent-soft); }
  50% { box-shadow: 0 0 0 6px var(--accent-soft); }
  100% { box-shadow: var(--shadow); }
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}
.card-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  flex: 0 0 auto;
}
.card-meta {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  flex: 0 0 auto;
}
.card-list {
  list-style: none;
  margin: 0;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 auto;
  overflow-y: auto;
  min-height: 0;
}

.row {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  transition: transform .12s, box-shadow .12s, border-color .12s;
  min-width: 0;
}
.row:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,.06);
  border-color: var(--accent);
}
.rank {
  width: 22px;
  text-align: center;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  flex: 0 0 22px;
  font-size: 13px;
}
.rank.top1 { color: #ff3b30; }
.rank.top2 { color: #ff9500; }
.rank.top3 { color: #ffcc00; }
.title {
  flex: 1;
  min-width: 0;
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.45;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  word-break: break-word;
}
.title:hover { color: var(--accent); }
.hot {
  font-size: 11px;
  color: var(--muted);
  background: var(--panel);
  padding: 2px 7px;
  border-radius: 10px;
  white-space: nowrap;
  border: 1px solid var(--border);
  flex: 0 0 auto;
  margin-top: 1px;
}

.empty { color: var(--muted); text-align: center; padding: 60px 0; grid-column: 1 / -1; }

@media (max-width: 1400px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1100px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  html, body { height: auto; overflow: visible; }
  body { padding: 0; padding-top: 56px; }

  .float-auto {
    top: 10px;
    right: 10px;
    padding: 6px 10px;
    font-size: 12px;
  }

  .mobile-tabs {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 40;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    padding-right: 110px;
    background: rgba(255, 255, 255, .95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  [data-theme="dark"] .mobile-tabs { background: rgba(30, 33, 40, .95); }
  .mobile-tabs::-webkit-scrollbar { display: none; }

  .mob-tab {
    flex: 0 0 auto;
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--panel);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: .15s;
    white-space: nowrap;
  }
  .mob-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 600;
  }

  .grid {
    display: block;
    height: auto;
    max-width: none;
    padding: 0 12px 24px;
  }

  .card {
    display: none;
    height: auto;
    margin-bottom: 16px;
  }
  .card.active { display: flex; }

  .card-list {
    overflow: visible;
    flex: none;
    padding: 12px;
    gap: 10px;
  }

  .row { padding: 11px 12px; }
  .title { font-size: 14px; -webkit-line-clamp: 3; }
  .hot { font-size: 12px; }
}