:root {
  --primary-warm: #78350f;  /* 暖深琥珀色 */
  --primary-dark: #3c2a21;  /* 深咖啡/浓缩咖啡色 */
  --good: #b45309;          /* 优秀榜主色：温暖的金色/琥珀色 */
  --bad: #9a3412;           /* 预警榜主色：深红褐色/铁锈红 */
  --bg: #faf6f0;            /* 页面背景：温暖的象牙白/米杏色 */
  --card: #ffffff;          /* 卡片背景：纯白 */
  --line: #f0e6df;          /* 边框线：温暖的浅沙色/粘土色 */
  --muted: #8c7a70;         /* 辅助文字：暖灰色 */
  --text: #2e251f;          /* 主文字：深暖灰褐 */
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-warm));
  color: #fff;
  padding: 20px 24px;
  text-align: center;
}
.topbar h1 { margin: 0; font-size: 26px; letter-spacing: 2px; font-weight: 700; }
.topbar .subtitle { margin-top: 6px; font-size: 13px; opacity: 0.8; }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.filter-group { display: flex; align-items: center; gap: 8px; }
.filter-group > label { font-size: 13px; color: var(--muted); font-weight: 600; }
.filter-group select {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg-btn {
  padding: 6px 14px;
  font-size: 14px;
  text-decoration: none;
  color: var(--text);
  background: #fff;
}
.seg-btn.active { background: var(--primary-warm); color: #fff; }

.overall-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 16px;
  max-width: 1400px;
  margin: 0 auto;
}
.kpi-card {
  background: var(--card);
  padding: 12px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(120,53,15,0.04);
  text-align: center;
  border: 1px solid var(--line);
}
.kpi-label {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
  font-weight: 600;
}
.kpi-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.kpi-card.rate-card {
  background: linear-gradient(135deg, var(--primary-warm), var(--primary-dark));
  border: none;
}
.kpi-card.rate-card .kpi-label {
  color: rgba(255,255,255,0.8);
}
.kpi-card.rate-card .kpi-value {
  color: #fff;
}

.mobile-tabs {
  display: none;
}

.boards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 0 18px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.board {
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(120,53,15,0.05);
  overflow: hidden;
  border-top: 5px solid var(--line);
}
.board.red { border-top-color: var(--good); }
.board.black { border-top-color: var(--bad); }
.board h2 {
  margin: 0;
  padding: 14px 18px;
  font-size: 17px;
  font-weight: 700;
}
.board.red h2 { color: var(--good); }
.board.black h2 { color: var(--bad); }

.table-wrap { max-height: 70vh; overflow-y: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  position: sticky;
  top: 0;
  background: #fdfbf9;
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}
tbody td { padding: 9px 12px; border-bottom: 1px solid #fcf9f6; color: var(--text); }
.rank { width: 48px; text-align: center; color: var(--muted); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.name { font-weight: 500; }
.rate-good { color: var(--good); font-weight: 700; }
.rate-bad { color: var(--bad); font-weight: 700; }

.board.red tr.hl { background: #fef3c7; } /* 温暖高亮：优秀榜 */
.board.black tr.hl { background: #ffedd5; } /* 温暖高亮：预警榜 */
.board.red tr.hl .name { color: var(--good); font-weight: 700; }
.board.black tr.hl .name { color: var(--bad); font-weight: 700; }

/* 第 4-10 名：圆形数字徽章 */
tr.hl .rank .rk {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}
.board.red tr.hl .rank .rk { background: var(--good); }
.board.black tr.hl .rank .rk { background: var(--bad); }

tr.top td { font-weight: 700; }
tr.top1 { background: #fef3c7; } /* 温暖金 */
tr.top2 { background: #f5ebe0; } /* 温暖银/沙色 */
tr.top3 { background: #ffedd5; } /* 温暖铜/杏色 */
tr.top .rank .rk { font-size: 0; }
tr.top .rank .rk::before { font-size: 18px; }
tr.top1 .rank .rk::before { content: "🥇"; }
tr.top2 .rank .rk::before { content: "🥈"; }
tr.top3 .rank .rk::before { content: "🥉"; }

tr.extra { display: none; }
.board.expanded tr.extra { display: table-row; }
.toggle-btn {
  display: block;
  width: 100%;
  padding: 12px;
  border: none;
  border-top: 1px solid var(--line);
  background: #fdfbf9;
  color: var(--primary-warm);
  font-size: 14px;
  cursor: pointer;
  font-weight: 600;
}
.toggle-btn:hover { background: #f5ebe0; }

.gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.gate-card {
  background: var(--card);
  max-width: 420px;
  width: 100%;
  padding: 40px 28px;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(120,53,15,0.08);
  text-align: center;
  border: 1px solid var(--line);
}
.gate-icon { font-size: 48px; margin-bottom: 12px; }
.gate-card h1 { font-size: 22px; color: var(--text); margin: 0 0 16px; font-weight: 700; }
.gate-card p { font-size: 15px; color: var(--muted); line-height: 1.7; margin: 0 0 12px; }
.gate-card .gate-tip { font-size: 13px; color: var(--muted); margin-top: 18px; }

.empty { text-align: center; padding: 60px 20px; color: var(--muted); font-size: 15px; }
.footer { text-align: center; padding: 18px; color: var(--muted); font-size: 12px; }

/* 上传页 */
.upload-card {
  max-width: 520px;
  margin: 30px auto;
  background: var(--card);
  padding: 26px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(120,53,15,0.06);
  border: 1px solid var(--line);
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--text); font-weight: 600; }
.field input {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}
.btn {
  background: var(--primary-warm);
  color: #fff;
  border: none;
  padding: 11px 20px;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  font-weight: 600;
  width: 100%;
  transition: background 0.2s;
}
.btn:hover { background: var(--primary-dark); }
.hint { font-size: 12px; color: var(--muted); margin-top: 10px; line-height: 1.5; }
.alert { padding: 12px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 18px; font-weight: 600; }
.alert.ok { background: #fef3c7; color: var(--good); border: 1px solid #fde68a; }
.alert.err { background: #ffedd5; color: var(--bad); border: 1px solid #fed7aa; }
.periods { margin-top: 22px; border-top: 1px dashed var(--line); padding-top: 16px; }
.periods-title { font-size: 13px; color: var(--muted); margin-bottom: 8px; font-weight: 600; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: #f5ebe0; color: var(--text); padding: 4px 10px; border-radius: 20px; font-size: 13px; font-weight: 500; }
.back { display: inline-block; margin-top: 20px; color: var(--primary-warm); text-decoration: none; font-size: 14px; font-weight: 600; }
.back:hover { color: var(--primary-dark); text-decoration: underline; }

@media (max-width: 800px) {
  .overall-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 10px 12px;
  }
  .kpi-card {
    padding: 8px 4px;
  }
  .kpi-value {
    font-size: 12px;
  }
  .mobile-tabs {
    display: flex;
    margin: 10px 16px;
    background: #f5ebe0;
    border-radius: 8px;
    padding: 4px;
  }
  .tab-btn {
    flex: 1;
    padding: 8px;
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
  }
  .tab-btn.active {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 2px 6px rgba(120,53,15,0.08);
  }
  .boards {
    grid-template-columns: 1fr;
    padding: 0 12px 20px;
  }
  .board {
    display: none;
  }
  .board.active-tab {
    display: block;
  }
  .filters {
    gap: 10px;
    padding: 10px;
  }
  tbody td {
    padding: 8px 6px;
    font-size: 13px;
  }
  thead th {
    padding: 8px 6px;
    font-size: 13px;
  }
}