/* ============ 设计变量 ============ */
:root {
  --bg: #f6f7fb;
  --bg-accent-1: rgba(247, 147, 26, 0.07);
  --bg-accent-2: rgba(59, 130, 246, 0.06);
  --card: #ffffff;
  --border: #eef0f5;
  --border-strong: #e4e7ee;
  --text: #171a20;
  --text-2: #5b6472;
  --text-3: #98a1b0;
  --btc: #f7931a;
  --btc-2: #ffb347;
  --up: #16a34a;
  --up-bg: rgba(22, 163, 74, 0.1);
  --down: #dc2626;
  --down-bg: rgba(220, 38, 38, 0.1);
  --blue: #3b82f6;
  --radius: 18px;
  --shadow-sm: 0 1px 2px rgba(23, 26, 32, 0.04), 0 4px 16px rgba(23, 26, 32, 0.04);
  --shadow-md: 0 2px 6px rgba(23, 26, 32, 0.05), 0 12px 32px rgba(23, 26, 32, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 500px at 85% -100px, var(--bg-accent-1), transparent 60%),
    radial-gradient(900px 420px at -10% 120px, var(--bg-accent-2), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
a { color: var(--btc); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--text-3); font-size: 13px; }

/* ============ 顶栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; }
.brand:hover { text-decoration: none; }
.brand-logo {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--btc), var(--btc-2));
  color: #fff; font-size: 22px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(247, 147, 26, 0.35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.brand-text strong { font-size: 15.5px; letter-spacing: 0.2px; white-space: nowrap; }
.brand-text em { font-style: normal; font-size: 12px; color: var(--text-3); }
.header-right { display: flex; align-items: center; gap: 12px; }
.status-pill {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--border-strong);
  font-size: 12.5px; color: var(--text-2);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #f59e0b; box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15); }
.dot.ok { background: var(--up); box-shadow: 0 0 0 3px var(--up-bg); }
.dot.warn { background: #f59e0b; box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15); }
.dot.bad { background: var(--down); box-shadow: 0 0 0 3px var(--down-bg); }
.gh-link { color: var(--text-2); display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; transition: all .2s; }
.gh-link:hover { background: #f0f2f7; color: var(--text); text-decoration: none; }

/* ============ Hero / KPI ============ */
.hero { padding: 40px 0 8px; }
.hero h1 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800; letter-spacing: -0.5px; line-height: 1.2;
}
.hero-sub { color: var(--text-2); margin: 10px 0 26px; font-size: 15px; max-width: 640px; }
.kpi-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(6, 1fr);
}
.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s cubic-bezier(.2,.7,.3,1), box-shadow .25s;
  position: relative; overflow: hidden;
  min-width: 0;
}
.kpi::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--btc), var(--btc-2));
  opacity: 0; transition: opacity .25s;
}
.kpi:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.kpi:hover::after { opacity: 1; }
.kpi-label { font-size: 12.5px; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
.kpi-value {
  font-size: clamp(19px, 1.75vw, 25px);
  font-weight: 800; letter-spacing: -0.3px;
  font-variant-numeric: tabular-nums;
  margin-top: 6px; white-space: nowrap;
}
.kpi-value .unit { font-size: 13px; font-weight: 600; color: var(--text-2); margin-left: 3px; }
.kpi-sub {
  font-size: 11.5px; color: var(--text-3); margin-top: 4px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.kpi-sub .pos { color: var(--up); font-weight: 600; }
.kpi-sub .neg { color: var(--down); font-weight: 600; }

/* ============ 卡片 ============ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px 22px 14px;
  margin-top: 18px;
  transition: box-shadow .25s;
}
.card:hover { box-shadow: var(--shadow-md); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 8px; flex-wrap: wrap; }
.card h2 { font-size: 17px; font-weight: 700; letter-spacing: -0.2px; }
.card-cap { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }
.chart { width: 100%; height: 380px; }
.chart-donut { height: 330px; }
.chart-bars { height: 330px; }
.legend-inline { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--text-2); padding-top: 4px; }
.swatch { width: 12px; height: 12px; border-radius: 4px; display: inline-block; }
.swatch-btc { background: linear-gradient(135deg, var(--btc), var(--btc-2)); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-2 .card { margin-top: 18px; }

/* ============ 区间切换按钮 ============ */
.range-pills { display: flex; gap: 4px; background: #f0f2f7; padding: 4px; border-radius: 999px; }
.range-pills button {
  border: 0; background: transparent; cursor: pointer;
  padding: 6px 14px; border-radius: 999px;
  font-size: 12.5px; color: var(--text-2); font-family: inherit;
  transition: all .2s;
}
.range-pills button:hover { color: var(--text); }
.range-pills button.active { background: #fff; color: var(--text); font-weight: 600; box-shadow: var(--shadow-sm); }

/* ============ 表格 ============ */
.table-scroll { overflow-x: auto; margin: 6px -6px 0; padding: 0 6px 6px; }
.etf-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.etf-table th {
  text-align: right; font-size: 12px; color: var(--text-3); font-weight: 600;
  padding: 10px 12px; border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.etf-table td { padding: 12px; border-bottom: 1px solid var(--border); text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.etf-table tr:last-child td { border-bottom: 0; }
.etf-table tbody tr { transition: background .15s; }
.etf-table tbody tr:hover { background: #fafbfd; }
.etf-table .t-left { text-align: left; }
.t-share { min-width: 160px; }
.share-bar { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.share-track { width: 90px; height: 6px; border-radius: 999px; background: #f0f2f7; overflow: hidden; }
.share-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--btc), var(--btc-2)); width: 0; transition: width 1s cubic-bezier(.2,.7,.3,1); }
.fund-name { display: flex; flex-direction: column; text-align: left; }
.fund-name b { font-weight: 650; display: flex; align-items: center; gap: 10px; }
.fund-name > span { font-size: 12px; color: var(--text-3); }
.pos { color: var(--up); }
.neg { color: var(--down); }
.badge {
  font-size: 10.5px; font-weight: 700; padding: 2px 7px; border-radius: 6px;
  background: linear-gradient(135deg, var(--btc), var(--btc-2)); color: #fff;
  letter-spacing: .3px;
}

/* ============ 热力表 ============ */
.heat-table { width: 100%; border-collapse: separate; border-spacing: 3px; font-size: 12px; }
.heat-table th { font-size: 11.5px; color: var(--text-3); font-weight: 600; padding: 4px 8px; white-space: nowrap; }
.heat-table td { padding: 8px; text-align: right; border-radius: 8px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.heat-table td.fund { text-align: left; font-weight: 650; background: #fafbfd; }

/* ============ 统计概览条 ============ */
.stats-strip-card { padding-bottom: 18px; }
.strip-title { font-size: 15px; font-weight: 700; display: flex; align-items: baseline; gap: 10px; margin-bottom: 14px; }
.strip-title .muted { font-size: 12px; font-weight: 400; }
.stat-chips { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.stat-chip {
  background: #fafbfd; border: 1px solid var(--border); border-radius: 14px;
  padding: 12px 14px; transition: transform .2s, box-shadow .2s;
}
.stat-chip:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.chip-label { font-size: 12px; color: var(--text-3); }
.chip-value { font-size: 19px; font-weight: 800; font-variant-numeric: tabular-nums; margin-top: 3px; letter-spacing: -0.2px; }
.chip-sub { font-size: 11.5px; color: var(--text-3); margin-top: 3px; }

/* ============ 历史纪录卡 ============ */
.record-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.record-card {
  background: linear-gradient(180deg, #fff, #fafbfd);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 14px 16px; transition: transform .2s, box-shadow .2s;
}
.record-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.identity { color: var(--text-2); }
.identity::before { content: "🧮 "; font-size: 11px; }

/* ============ 月度热力表 ============ */
.month-table { width: 100%; border-collapse: separate; border-spacing: 3px; font-size: 12px; }
.month-table th { font-size: 11.5px; color: var(--text-3); font-weight: 600; padding: 4px 6px; white-space: nowrap; }
.month-table td { padding: 9px 6px; text-align: center; border-radius: 8px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.month-table .m-year { font-weight: 700; background: #fafbfd; }
.month-table .m-zero { color: #c3c9d4; }
.month-table .m-note { color: var(--text-3); font-size: 11.5px; text-align: left; padding-top: 8px; }
.month-table .pos { color: var(--up); }
.month-table .neg { color: var(--down); }

/* ============ 关于/页脚 ============ */
.about { margin: 26px 0 8px; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 26px; }
.about h3 { font-size: 14px; margin-bottom: 8px; }
.about p { font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.dictionary b { color: var(--text-2); font-weight: 650; }
.dictionary { line-height: 1.9; }
.site-footer { border-top: 1px solid var(--border); margin-top: 30px; padding: 18px 0 26px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-2); }

/* ============ 加载骨架 ============ */
.skeleton-overlay { padding: 130px 24px 40px; max-width: 1180px; margin: 0 auto; }
.skeleton-overlay.done { display: none; }
.sk { border-radius: var(--radius); background: linear-gradient(100deg, #eef0f5 40%, #f7f8fb 50%, #eef0f5 60%); background-size: 200% 100%; animation: shimmer 1.4s infinite linear; }
.kpi-skeleton { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; margin-bottom: 18px; }
.sk-box { height: 108px; border-radius: var(--radius); }
.sk-chart { height: 380px; margin-top: 18px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ============ 入场动画 ============ */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .kpi-grid { grid-template-columns: repeat(3, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .stat-chips, .record-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi-skeleton { grid-template-columns: repeat(2, 1fr); }
  .header-inner { height: 58px; }
  .brand-text em { display: none; }
  .hero { padding-top: 26px; }
  .chart { height: 300px; }
  .stat-chips, .record-grid { grid-template-columns: 1fr 1fr; }
  .status-pill span:last-child { max-width: 150px; overflow: hidden; text-overflow: ellipsis; }
}