:root {
  --ink: #112020;
  --muted: #5f6c68;
  --panel: #ffffff;
  --paper: #f3f6f3;
  --line: #d8e2de;
  --main: #0f5b48;
  --main2: #d17a16;
  --special: #8a2349;
  --shadow: 0 18px 45px rgba(13, 36, 31, .11);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(17, 32, 32, .05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(17, 32, 32, .04) 1px, transparent 1px),
    var(--paper);
  background-size: 30px 30px;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 4px;
  background: var(--ink);
  border-radius: 8px;
}

.brand-mark span {
  border-radius: 50%;
  background: var(--main);
}

.brand-mark span:nth-child(3n) { background: var(--main2); }
.brand-mark span:nth-child(4) { background: var(--special); }

button {
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

button:disabled {
  opacity: .62;
  cursor: default;
}

button:focus-visible {
  outline: 3px solid rgba(15, 91, 72, .24);
  outline-offset: 2px;
}

.hero,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(330px, .9fr);
  gap: 22px;
  padding: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--main);
  font-size: 13px;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 38px);
  line-height: 1.05;
}

.lead {
  margin: 14px 0 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  align-content: end;
}

.metrics div {
  min-height: 110px;
  padding: 14px;
  border-top: 4px solid var(--ink);
  background: #fafdfb;
}

.metrics span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metrics strong {
  display: block;
  margin-top: 12px;
  font-size: 22px;
}

.panel {
  margin-top: 20px;
  padding: 18px;
}

.compact-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

h2 {
  margin: 0;
  font-size: 18px;
}

h3 {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
}

.copy-button {
  min-height: 34px;
  padding: 0 12px;
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 13px;
}

.copy-button:hover {
  border-color: var(--ink);
}

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.recommend-card {
  min-height: 104px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fcfdfc;
}

.rank {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font: 800 18px Consolas, "Segoe UI Mono", monospace;
  background: #8a2349;
}

.numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ball {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font: 800 14px Consolas, "Segoe UI Mono", monospace;
}

.main-ball { background: var(--main); }
.t-ball { background: var(--special); }

.specials {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.special-pill {
  min-width: 54px;
  min-height: 42px;
  display: grid;
  place-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: #f6eef1;
  color: var(--special);
  font: 800 16px Consolas, "Segoe UI Mono", monospace;
}

.recent-list {
  display: grid;
  gap: 10px;
}

.lower-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.draw-row {
  display: grid;
  grid-template-columns: 94px 108px 1fr;
  gap: 12px;
  align-items: center;
  min-height: 52px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fcfdfc;
}

.draw-row time,
.draw-row strong {
  color: var(--muted);
  font-size: 13px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: #fff;
  font-size: 13px;
}

.chip strong {
  color: var(--main);
  font-family: Consolas, "Segoe UI Mono", monospace;
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.summary-item {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
}

.summary-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.summary-item strong {
  display: block;
  margin-top: 4px;
  font-size: 18px;
}

.backtest-list {
  display: grid;
  gap: 10px;
}

.backtest-row {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
}

.backtest-row strong,
.backtest-row span {
  display: block;
}

.backtest-row strong {
  font-size: 14px;
}

.backtest-row span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.empty {
  color: var(--muted);
  line-height: 1.7;
}

.error-box {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(138, 35, 73, .35);
  border-radius: 8px;
  background: rgba(138, 35, 73, .08);
  color: #7a1f41;
}

.disclaimer {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

@media (max-width: 960px) {
  .hero,
  .recommend-grid,
  .lower-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .compact-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 22px, 1180px);
    padding-top: 12px;
  }

  .topbar,
  .section-head {
    flex-direction: column;
    align-items: stretch;
  }

  button {
    width: 100%;
  }

  .summary-strip,
  .draw-row,
  .metrics {
    grid-template-columns: 1fr;
  }

  .summary-item {
    min-width: 0;
  }
}