*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:     #ffffff;
  --bg2:    #f6f8fa;
  --bg3:    #f0f2f5;
  --border: #d0d7de;
  --txt:    #24292f;
  --txt2:   #57606a;
  /* 品牌主色 —— 收盘 shoupan */
  --accent:       #185FA5;
  --accent-rgb:   24, 95, 165;
  --accent-light: #E6F1FB;
  --accent-dark:  #0C447C;
  /* 品牌辅色 —— CTA / 强调用，节制使用 */
  --brand-2:       #EF9F27;
  --brand-2-rgb:   239, 159, 39;
  --brand-2-light: #FAEEDA;
  --brand-2-dark:  #BA7517;
  --green:  #1a7f37;
  --red:    #cf222e;
  --warn:   #9a6700;
  --up:     #cf222e;
  --down:   #1a7f37;
}

body {
  background: var(--bg);
  color: var(--txt);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  min-height: 100vh;
}

/* ── Header ── */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 54px;
  display: flex;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 1px 3px rgba(27,31,36,.06);
}
header h1 { font-size: 18px; font-weight: 700; color: var(--accent); letter-spacing: .5px; white-space: nowrap; flex-shrink: 0; }

/* 窄屏时导航横向滚动,而不是被 flex 压缩成竖排文字 */
.header-nav {
  display: flex;
  gap: 6px;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;        /* Firefox 隐藏滚动条 */
  -webkit-overflow-scrolling: touch;
}
.header-nav::-webkit-scrollbar { display: none; }
.nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--txt2);
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }
.nav-btn:not(.active):hover { border-color: var(--accent); color: var(--accent); background: rgba(24,95,165,.06); }

.tip-badge {
  font-size: 11px;
  font-weight: 400;
  color: var(--warn);
  background: rgba(154,103,0,.08);
  border: 1px solid rgba(154,103,0,.25);
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 8px;
}

/* ── Layout ── */
main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── Footer ── */
.site-footer {
  max-width: 1440px;
  margin: 8px auto 20px;
  padding: 14px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  color: var(--txt2);
  font-size: 12.5px;
  border-top: 1px solid var(--border);
}
.site-footer-brand {
  font-weight: 700;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: .3px;
}
.site-footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 10px;
}
.site-footer a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}
.site-footer a:hover { text-decoration: underline; }
.site-footer-legal { font-size: 11px; }
.site-footer-legal a { font-weight: 400; }
.site-footer-beian { font-size: 12px; }

.panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  box-shadow: 0 1px 4px rgba(27,31,36,.06);
}
.panel-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--txt);
}
.panel-title span { color: var(--txt2); font-size: 13px; font-weight: 400; }

/* ── Form ── */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px 18px;
  margin-bottom: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}
.form-group label {
  font-size: 11px;
  color: var(--txt2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.form-group input, .form-group select { width: 100%; }
input[type=text], input[type=date], input[type=number], select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--txt);
  padding: 7px 10px;
  font-size: 13px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input[type=text]:focus, input[type=date]:focus, input[type=number]:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(24,95,165,.12);
}
.inline-group { display: flex; gap: 6px; align-items: flex-end; }
.inline-group input { flex: 1; min-width: 0; }
.inline-group .btn { white-space: nowrap; flex-shrink: 0; }

.stock-tag {
  font-size: 12px;
  color: var(--accent);
  min-height: 18px;
  margin-top: 2px;
}

/* ── Buttons ── */
.btn { border: none; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 600; padding: 7px 14px; transition: opacity .15s, background .15s, box-shadow .15s; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:not(:disabled):hover { background: #0C447C; box-shadow: 0 2px 6px rgba(24,95,165,.3); }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-outline:hover { background: rgba(24,95,165,.06); }
.btn-ghost { background: rgba(24,95,165,.06); color: var(--accent); border: 1px solid rgba(24,95,165,.2); }
.btn-ghost:hover { background: rgba(24,95,165,.12); }
.btn-danger { background: transparent; color: var(--red); border: 1px solid rgba(207,34,46,.25); }
.btn-danger:hover { background: rgba(207,34,46,.06); }
.btn-run {
  width: 100%;
  margin-top: 14px;
  padding: 10px;
  font-size: 14px;
  position: sticky;
  bottom: 12px;
  box-shadow: 0 4px 14px rgba(27,31,36,.18);
}

/* ── Strategy panel ── */
.strategy-section-label {
  font-size: 12px;
  color: var(--txt2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
  margin-bottom: 12px;
}
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 22px;
}
.strategy-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  cursor: pointer;
  transition: border-color .15s, transform .1s, box-shadow .15s;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.strategy-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 3px 8px rgba(24,95,165,.1); }
.strategy-card.selected-card {
  border-color: var(--accent);
  background: rgba(24,95,165,.05);
  box-shadow: 0 0 0 2px rgba(24,95,165,.2);
}
.sc-name { font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 6px; color: var(--txt); }
.sc-desc {
  font-size: 11px;
  color: var(--txt2);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.sc-add { margin-top: 8px; font-size: 12px; padding: 4px 10px; }
.sc-btn-row { display: flex; align-items: center; gap: 6px; }
.sc-btn-row .sc-add-primary { flex: 1; white-space: nowrap; font-weight: 700; }
.sc-quickrun {
  background: transparent;
  border: none;
  color: var(--txt2);
  padding: 4px 8px;
  font-size: 11.5px;
  font-weight: 500;
  white-space: nowrap;
}
.sc-quickrun:hover { color: var(--accent); background: rgba(24,95,165,.08); border-radius: 6px; }
.sc-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 0 6px;
  min-width: 18px;
  height: 18px;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

/* selected instances */
.instances-list { display: flex; flex-direction: column; gap: 10px; }
.empty-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--txt2);
  font-size: 13px;
  padding: 26px 14px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--bg2);
}
.empty-hint-icon { font-size: 22px; opacity: .55; }
.instance-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.instance-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(24,95,165,.04);
}
.instance-label-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--txt);
  font-size: 13px;
  font-weight: 600;
  outline: none;
}
.instance-label-input:focus { text-decoration: underline dashed; }
.instance-badge {
  font-size: 10px;
  color: var(--txt2);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  white-space: nowrap;
}
.instance-params {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}
.param-item { display: flex; flex-direction: column; gap: 3px; }
.param-item label { font-size: 11px; color: var(--txt2); }
.param-item input { font-size: 12px; padding: 5px 8px; }
.no-params-hint { font-size: 12px; color: var(--txt2); padding: 4px 0; }

/* ── Charts ── */
.chart-wrap { width: 100%; height: 480px; }
.chart-wrap-sm { width: 100%; height: 320px; }

/* ── Metrics table ── */
.metrics-scroll { overflow-x: auto; }
table.metrics-tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 500px;
}
.metrics-tbl th {
  background: var(--bg2);
  padding: 9px 16px;
  text-align: center;
  font-size: 11px;
  color: var(--txt2);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.metrics-tbl th.bm-col { color: var(--txt2); font-style: italic; }
.metrics-tbl td {
  padding: 8px 16px;
  text-align: center;
  border: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg);
}
.metrics-tbl td.row-label { text-align: left; color: var(--txt2); font-size: 12px; background: var(--bg2); }
.val-pos { color: var(--up); font-weight: 600; }
.val-neg { color: var(--down); font-weight: 600; }
.val-warn { color: var(--warn); font-weight: 600; }
.val-neutral { color: var(--txt2); }

/* ── Equity chart section ── */
.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--txt2);
  margin: 20px 0 10px;
  text-transform: uppercase;
  letter-spacing: .4px;
}

/* ── Trades ── */
.trades-tabs { display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
.tab-btn {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--txt2);
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
}
.tab-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(24,95,165,.07); }
.trade-panel { display: none; }
.trade-panel.active { display: block; }
.trades-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.trades-filter { display: flex; gap: 6px; }
.tf-btn {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--txt2);
  padding: 3px 10px;
  font-size: 11.5px;
  cursor: pointer;
  transition: all .15s;
}
.tf-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(24,95,165,.07); }
.trades-code-filter {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11.5px;
  width: 100px;
  color: var(--txt);
  background: var(--bg);
}
.trades-scroll { overflow-x: auto; max-height: 360px; overflow-y: auto; }
table.trades-tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  min-width: 600px;
}
.trades-tbl th {
  background: var(--bg2);
  padding: 7px 12px;
  text-align: center;
  color: var(--txt2);
  border: 1px solid var(--border);
  position: sticky;
  top: 0;
  font-size: 11px;
}
.trades-tbl td {
  padding: 6px 12px;
  text-align: center;
  border: 1px solid var(--border);
  background: var(--bg);
}
.trades-tbl tr.buy-row td { background: rgba(207,34,46,.04); }
.trades-tbl tr.sell-row td { background: rgba(26,127,55,.04); }
.badge-buy { background: rgba(207,34,46,.1); color: var(--up); border-radius: 4px; padding: 2px 8px; font-weight: 600; }
.badge-sell { background: rgba(26,127,55,.1); color: var(--down); border-radius: 4px; padding: 2px 8px; font-weight: 600; }
.no-trade { color: var(--txt2); font-size: 13px; padding: 20px; text-align: center; }

/* ── Loading overlay ── */
#loading {
  position: fixed; inset: 0;
  background: rgba(255,255,255,.75);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.loader-box { text-align: center; }
.spinner {
  width: 44px; height: 44px;
  border: 4px solid rgba(24,95,165,.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-box p { color: var(--txt2); font-size: 13px; }

#progressBar { margin-top: 14px; width: 260px; text-align: center; }
.pb-track {
  width: 100%; height: 6px;
  background: rgba(24,95,165,.12);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 6px;
}
.pb-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width .3s ease;
  width: 0%;
}
/* 不定量进度:批量加载行情 / 回测计算这类"一次性、无法分步上报"的阶段,
   用流动条纹替代假装精确又卡住的百分比 */
.pb-track.indeterminate .pb-fill {
  width: 40%;
  transition: none;
  animation: pb-slide 1.1s ease-in-out infinite;
}
@keyframes pb-slide {
  0%   { margin-left: -45%; }
  100% { margin-left: 100%; }
}
.pb-label { font-size: 11px; color: var(--accent); font-weight: 600; }

/* ── Error box ── */
.error-box {
  background: rgba(207,34,46,.06);
  border: 1px solid rgba(207,34,46,.25);
  border-radius: 8px;
  color: var(--red);
  padding: 10px 14px;
  font-size: 13px;
  margin-top: 8px;
}

hr.divider { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

/* ── Portfolio selected strategy card ── */
.portfolio-instance-card {
  background: var(--bg2);
  border: 1px solid var(--accent);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 4px;
}
.portfolio-instance-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: rgba(24,95,165,.05);
  border-bottom: 1px solid var(--border);
}
.portfolio-instance-title { flex: 1; font-size: 13px; font-weight: 600; color: var(--accent); }
.portfolio-instance-params {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}

/* ── Holdings log ── */
.holdings-table-wrap { overflow-x: auto; max-height: 300px; overflow-y: auto; margin-top: 8px; }
table.holdings-tbl { width: 100%; border-collapse: collapse; font-size: 12px; min-width: 300px; }
.holdings-tbl th {
  background: var(--bg2); padding: 6px 10px; color: var(--txt2);
  border: 1px solid var(--border); font-size: 11px; position: sticky; top: 0;
}
.holdings-tbl td { padding: 5px 10px; border: 1px solid var(--border); font-size: 12px; background: var(--bg); }
.stock-chip {
  display: inline-block;
  background: rgba(24,95,165,.08);
  color: var(--accent);
  border-radius: 4px;
  padding: 1px 6px; margin: 1px; font-size: 11px;
}

/* code column in trades for portfolio results */
.trades-tbl td.code-cell { font-family: monospace; color: var(--accent); }
.no-data { color: var(--txt2); font-size: 13px; padding: 20px; text-align: center; }

/* ── Robustness check ── */
.robustness-block { margin-bottom: 18px; }
.robustness-block:last-child { margin-bottom: 0; }
.robustness-strategy-name { font-size: 13px; font-weight: 700; color: var(--txt); margin-bottom: 8px; }
.robustness-subtitle { font-size: 12px; font-weight: 600; color: var(--txt2); margin: 10px 0 6px; }
.oos-hint { font-size: 11.5px; color: var(--txt2); margin-bottom: 6px; }

/* ── 选股策略：策略说明 + 回测口径(2026 优化) ───────────────────────────── */
.strategy-detail-box {
  margin: 12px 0 4px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--bg2);
  padding: 12px 14px;
}
.sd-row { display: flex; gap: 10px; padding: 5px 0; font-size: 13px; line-height: 1.55; }
.sd-row + .sd-row { border-top: 1px dashed var(--border); }
.sd-label {
  flex: 0 0 64px; font-weight: 700; color: var(--accent);
  font-size: 12px; padding-top: 1px;
}
.sd-text { color: var(--txt); flex: 1; }
.sd-row.sd-warn .sd-label { color: var(--warn); }
.sd-row.sd-warn .sd-text { color: var(--warn); }

.method-controls {
  display: flex; flex-direction: column; gap: 12px;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); padding: 12px 14px;
}
.method-check { display: block; cursor: pointer; }
.method-check > input { margin-right: 6px; vertical-align: middle; }
.method-check > span { font-weight: 600; font-size: 13px; color: var(--txt); }
.method-check > span em { color: var(--accent); font-style: normal; font-size: 11px; }
.method-check > small {
  display: block; margin: 3px 0 0 22px;
  font-size: 12px; color: var(--txt2); line-height: 1.5;
}
.method-check small strong { color: var(--red); font-weight: 600; }
.method-check small em { color: var(--warn); font-style: normal; }
.method-boards { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.method-boards-label { font-weight: 600; font-size: 13px; color: var(--txt); }
.method-boards label { font-size: 13px; color: var(--txt); cursor: pointer; }
.method-boards label input { margin-right: 4px; vertical-align: middle; }
.method-boards-hint { flex-basis: 100%; font-size: 12px; color: var(--txt2); margin-left: 0; }

/* ── 响应式（≤768px 手机 / 窄窗口，全站共用）─────────────────────────── */
@media (max-width: 768px) {
  header { padding: 0 12px; gap: 12px; }
  header h1 { font-size: 16px; }
  main { padding: 12px; gap: 12px; }
  .panel { padding: 14px; border-radius: 8px; }
  .chart-wrap { height: 320px; }
  .chart-wrap-sm { height: 240px; }
  .form-row { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
}