/* QuantAI —— 浅色主题 */
:root {
  --bg: #f6f7f9; --panel: #ffffff; --line: #e5e8ee; --line-2: #d3d8e2;
  --text: #1c2430; --muted: #6b7686; --faint: #98a2b3;
  --primary: #1f3a5f; --primary-2: #2b5b8f; --accent: #0f8b8d; --accent-soft: #e3f4f4;
  --up: #15a06a; --down: #dc4b4b; --warn: #c8811a; --warn-soft: #fff4e0;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 4px 16px rgba(16,24,40,.06);
  --radius: 12px; --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -.01em; }
code, pre, .mono { font-family: var(--mono); }
pre { background: #f2f4f8; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow: auto; font-size: 13px; line-height: 1.55; margin: 0; white-space: pre-wrap; }
button { font: inherit; cursor: pointer; }
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .03em; }
td.num, th.num { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.up { color: var(--up); } .down { color: var(--down); } .muted { color: var(--muted); } .faint { color: var(--faint); }
.small { font-size: 12.5px; }

/* 顶栏 */
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--line); }
.topbar .inner { max-width: 1280px; margin: 0 auto; padding: 0 20px; height: 58px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--primary); font-size: 17px; }
.brand .logo { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); display: grid; place-items: center; color: #fff; font-size: 13px; font-weight: 800; }
.brand .tag { font-size: 11px; color: var(--muted); font-weight: 500; border: 1px solid var(--line-2); border-radius: 999px; padding: 1px 8px; margin-left: 2px; }
nav.tabs { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; }
nav.tabs a { color: var(--muted); padding: 8px 12px; border-radius: 8px; font-weight: 500; white-space: nowrap; }
nav.tabs a:hover { background: #f0f2f6; text-decoration: none; color: var(--text); }
nav.tabs a.active { background: var(--primary); color: #fff; }
.ticker-mini { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 14px; white-space: nowrap; }
.ticker-mini .px { font-weight: 700; color: var(--text); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--faint); display: inline-block; }
.dot.on { background: var(--up); box-shadow: 0 0 0 3px rgba(21,160,106,.18); }
.dot.off { background: var(--down); }

/* 布局 */
main { max-width: 1280px; margin: 0 auto; padding: 24px 20px 60px; }
section.view { display: none; }
section.view.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.page-head h1 { font-size: 24px; color: var(--primary); }
.page-head p { margin: 4px 0 0; color: var(--muted); max-width: 720px; }
.grid { display: grid; gap: 16px; }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-2-1 { grid-template-columns: 2fr 1fr; }
.g-1-2 { grid-template-columns: 1fr 2fr; }
@media (max-width: 1000px) { .g4 { grid-template-columns: repeat(2, 1fr); } .g3, .g-2-1, .g-1-2 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .g4, .g2 { grid-template-columns: 1fr; } .topbar .inner { gap: 10px; } .ticker-mini { display: none; } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px; min-width: 0; }
.card h3 { font-size: 14px; color: var(--muted); font-weight: 600; margin-bottom: 8px; }
.card .big { font-size: 28px; font-weight: 700; font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.card .sub { color: var(--muted); font-size: 13px; margin-top: 4px; }
.card-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; gap: 12px; flex-wrap: wrap; }
.card-title h2 { font-size: 16px; }
.stack { display: flex; flex-direction: column; gap: 16px; }

/* 图表 */
.chart { position: relative; width: 100%; }
.chart canvas { display: block; width: 100%; }
.chart .tip { position: absolute; pointer-events: none; background: rgba(28,36,48,.92); color: #fff; font: 12px/1.5 var(--mono); padding: 6px 9px; border-radius: 6px; white-space: nowrap; display: none; z-index: 5; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.legend span::before { content: ""; display: inline-block; width: 10px; height: 3px; border-radius: 2px; background: var(--c); margin-right: 6px; vertical-align: middle; }

/* 控件 */
.seg { display: inline-flex; border: 1px solid var(--line-2); border-radius: 8px; overflow: hidden; background: #fff; }
.seg button { border: 0; background: transparent; padding: 6px 12px; color: var(--muted); font-size: 13px; font-weight: 500; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.active { background: var(--primary); color: #fff; }
.btn { border: 1px solid var(--line-2); background: #fff; color: var(--text); padding: 8px 14px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.btn:hover { border-color: var(--primary-2); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-2); color: #fff; }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: .55; cursor: wait; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.field label { font-weight: 600; font-size: 12.5px; }
.field input, .field select { font: inherit; padding: 7px 10px; border: 1px solid var(--line-2); border-radius: 8px; background: #fff; color: var(--text); min-width: 0; }
.field input:focus, .field select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.field .help { color: var(--faint); font-size: 11.5px; line-height: 1.4; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.check { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--text); padding-top: 22px; }
.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; background: #eef1f6; color: var(--muted); }
.pill.cat-趋势跟踪 { background: #e6efff; color: #2b5b8f; }
.pill.cat-动量 { background: #eef; color: #5b3fa8; }
.pill.cat-均值回归 { background: #e3f4f4; color: #0f8b8d; }
.pill.cat-套利 { background: #fff1e0; color: #b16a0a; }
.pill.cat-基准 { background: #eef1f6; color: #6b7686; }
.note { background: var(--warn-soft); border: 1px solid #f3d9a4; color: #7a4d06; border-radius: 8px; padding: 10px 14px; font-size: 13.5px; }
.err { background: #fdeaea; border: 1px solid #f3b5b5; color: #8f1f1f; border-radius: 8px; padding: 10px 14px; font-size: 13.5px; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 13.5px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; font-family: var(--mono); }
.spinner { width: 16px; height: 16px; border: 2px solid var(--line-2); border-top-color: var(--primary); border-radius: 50%; display: inline-block; animation: spin .8s linear infinite; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 策略模块 */
.strat-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.strat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.strat-card { cursor: pointer; transition: transform .15s, box-shadow .15s, border-color .15s; display: flex; flex-direction: column; gap: 10px; }
.strat-card:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(16,24,40,.1); border-color: var(--line-2); }
.strat-card.active { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.strat-card h4 { font-size: 16px; color: var(--primary); }
.strat-card .meta { display: flex; gap: 6px; flex-wrap: wrap; }
.strat-card p { margin: 0; color: var(--muted); font-size: 13.5px; }
.strat-detail { margin-top: 20px; }
.strat-detail h2 { font-size: 22px; color: var(--primary); }
.strat-detail h3 { font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; margin: 18px 0 8px; }
.strat-detail ul, .strat-detail ol { margin: 0; padding-left: 20px; }
.strat-detail li { margin: 4px 0; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 800px) { .two { grid-template-columns: 1fr; } }
.pros li::marker { color: var(--up); } .cons li::marker { color: var(--down); }
.rule { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.rule .n { width: 22px; height: 22px; flex: none; border-radius: 6px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-size: 12px; font-weight: 700; }

/* 回测结果 */
.metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.metric { background: #f8f9fb; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.metric .k { font-size: 12px; color: var(--muted); }
.metric .v { font-size: 18px; font-weight: 700; font-family: var(--mono); font-variant-numeric: tabular-nums; margin-top: 2px; }
.metric .b { font-size: 11.5px; color: var(--faint); font-family: var(--mono); }
.heat { display: grid; grid-template-columns: 56px repeat(12, 1fr); gap: 3px; font-size: 11.5px; font-family: var(--mono); }
.heat .y { color: var(--muted); display: flex; align-items: center; }
.heat .m { text-align: center; color: var(--faint); }
.heat .c { border-radius: 4px; text-align: center; padding: 4px 0; color: #1c2430; background: #f2f4f8; }
.trades-wrap { max-height: 360px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
.trades-wrap table th { position: sticky; top: 0; background: #fff; }

/* 架构 */
.arch { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.arch .box { background: #f8f9fb; border: 1px solid var(--line); border-radius: 10px; padding: 12px; font-size: 13px; position: relative; }
.arch .box b { display: block; color: var(--primary); margin-bottom: 4px; font-size: 14px; }
.arch .box small { color: var(--muted); display: block; line-height: 1.5; }
.arch .box:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); color: var(--faint); font-size: 16px; }
@media (max-width: 900px) { .arch { grid-template-columns: 1fr; } .arch .box:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -18px; transform: translateX(-50%); } }
.timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
@media (max-width: 900px) { .timeline { grid-template-columns: 1fr 1fr; } }
.phase { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; background: #fff; }
.phase .st { font-size: 11.5px; font-weight: 700; border-radius: 999px; padding: 2px 8px; display: inline-block; margin-bottom: 6px; }
.phase .st.done { background: #e3f6ee; color: var(--up); } .phase .st.doing { background: #e6efff; color: var(--primary-2); } .phase .st.todo { background: #eef1f6; color: var(--muted); }
.phase b { display: block; font-size: 14px; }
.phase ul { margin: 6px 0 0; padding-left: 16px; font-size: 12.5px; color: var(--muted); }
footer { max-width: 1280px; margin: 0 auto; padding: 0 20px 30px; color: var(--faint); font-size: 12.5px; }
footer .disc { border-top: 1px solid var(--line); padding-top: 14px; }