:root {
    /* 设计系统: Data-Dense Dashboard (Fintech) */
    --color-primary: #1E40AF;
    --color-on-primary: #FFFFFF;
    --color-secondary: #3B82F6;
    --color-accent: #D97706;
    --color-bg: #F8FAFC;
    --color-fg: #0F172A;
    --color-heading: #1E3A8A;
    --color-muted: #64748B;
    --color-muted-bg: #E9EEF6;
    --color-border: #DBEAFE;
    --color-card: #FFFFFF;
    --color-up: #059669;
    --color-up-bg: #ECFDF5;
    --color-down: #DC2626;
    --color-down-bg: #FEF2F2;
    --color-warn: #D97706;
    --color-warn-bg: #FFFBEB;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 1px 2px rgba(15, 23, 42, 0.05), 0 8px 24px rgba(30, 64, 175, 0.06);
    --radius: 12px;
    --radius-sm: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

/* ===== 顶栏 ===== */
.topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    background: linear-gradient(135deg, #172554 0%, #1E40AF 100%);
    color: #fff;
    box-shadow: 0 2px 12px rgba(23, 37, 84, 0.25);
}
.topbar-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: max(14px, env(safe-area-inset-top, 0px)) 20px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
    width: 42px; height: 42px;
    display: grid; place-items: center;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    color: #93C5FD;
    flex: none;
}
.brand-mark svg { width: 24px; height: 24px; }
.brand-text h1 { margin: 0; font-size: 18px; font-weight: 700; letter-spacing: 0.01em; }
.brand-sub { display: block; margin-top: 2px; font-size: 12px; color: #BFDBFE; letter-spacing: 0.05em; }
.topbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

/* ===== 顶部锚点导航 ===== */
.topnav {
    display: flex;
    align-items: center;
    gap: 4px;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.topnav::-webkit-scrollbar { display: none; }
.nav-link {
    flex: none;
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #BFDBFE;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s ease, color 0.15s ease;
}
.nav-link:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.nav-link.is-active { background: rgba(255, 255, 255, 0.16); color: #fff; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18); }

/* ===== 卡片头右侧组合 ===== */
.card-head-right { display: inline-flex; align-items: center; gap: 10px; }

/* ===== 信号新鲜度 ===== */
.freshness {
    display: inline-flex;
    align-items: center;
    padding: 4px 11px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}
.freshness.fresh { color: var(--color-up); background: var(--color-up-bg); }
.freshness.aging { color: var(--color-warn); background: var(--color-warn-bg); }
.freshness.stale { color: var(--color-down); background: var(--color-down-bg); }

/* ===== 市场状态标签 ===== */
.tag-market {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}
.tag-market.market-ok { color: var(--color-up); background: var(--color-up-bg); }
.tag-market.bear-mark { color: var(--color-down); background: var(--color-down-bg); }
.status-pill {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px; font-weight: 600;
    background: rgba(255, 255, 255, 0.12);
    color: #E2E8F0;
    border: 1px solid rgba(255, 255, 255, 0.18);
}
.status-pill::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #94A3B8; }
.status-pill.ok::before { background: #34D399; box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.25); }
.status-pill.warn::before { background: #FBBF24; box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.25); }
.status-pill.err::before { background: #F87171; box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.25); }
.update-time { font-size: 12.5px; color: #BFDBFE; font-variant-numeric: tabular-nums; }

.btn {
    display: inline-flex; align-items: center; gap: 6px;
    border: none; cursor: pointer;
    font-family: inherit; font-size: 14px; font-weight: 600;
    padding: 9px 14px; border-radius: var(--radius-sm);
    transition: background-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    min-height: 40px;
    touch-action: manipulation;
}
.btn svg { width: 16px; height: 16px; }
.btn:focus-visible { outline: 3px solid rgba(147, 197, 253, 0.6); outline-offset: 2px; }
.btn-primary { background: var(--color-secondary); color: #fff; box-shadow: 0 1px 2px rgba(15, 23, 42, 0.2); }
.btn-primary:hover { background: #2563EB; }
.btn-primary:active { transform: scale(0.97); }

/* ===== 布局 ===== */
.container {
    max-width: 1180px;
    margin: 24px auto 40px;
    padding: 0 20px;
    display: grid;
    gap: 20px;
}
.container > * { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    transition: box-shadow 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); }

.card-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap;
    margin-bottom: 16px;
}
.card-head h2 {
    display: flex; align-items: center; gap: 9px;
    margin: 0;
    font-size: 15.5px; font-weight: 700;
    color: var(--color-heading);
}
.card-head h2 svg { width: 18px; height: 18px; color: var(--color-primary); flex: none; }
.hint { font-size: 12.5px; color: var(--color-muted); }

/* ===== 信号卡 ===== */
.signal-card {
    border-left: 4px solid var(--color-up);
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FBFF 100%);
    box-shadow: var(--shadow-sm), 0 0 0 1px rgba(30, 64, 175, 0.03) inset;
}
.signal-card.is-switch { border-left-color: var(--color-warn); }
.signal-card.is-empty { border-left-color: var(--color-down); }
.badge {
    display: inline-flex; align-items: center;
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 14px; font-weight: 700;
    letter-spacing: 0.06em;
}
.badge.hold { background: var(--color-up-bg); color: var(--color-up); }
.badge.switch { background: var(--color-warn-bg); color: var(--color-warn); }
.badge.empty { background: var(--color-down-bg); color: var(--color-down); }

.signal-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.signal-cell {
    background: var(--color-muted-bg);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}
.cell-label { display: block; font-size: 12.5px; color: var(--color-muted); margin-bottom: 6px; }
.cell-value {
    display: block; font-size: 22px; font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--color-fg);
    word-break: break-all;
}
.cell-value.up { color: var(--color-up); }
.cell-value.down { color: var(--color-down); }
.cell-value.neutral { color: var(--color-muted); }
.signal-reason { margin-top: 14px; font-size: 14px; color: #334155; background: var(--color-muted-bg); border-radius: var(--radius-sm); padding: 12px 16px; }
.signal-meta { margin-top: 10px; font-size: 12.5px; color: var(--color-muted); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ver-tag {
    display: inline-flex; align-items: center;
    font-size: 11.5px; font-weight: 700;
    color: var(--color-primary);
    background: #DBEAFE;
    padding: 3px 10px;
    border-radius: 999px;
}
.signal-tip {
    margin-top: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-sm);
    padding: 11px 14px;
    font-size: 13px;
    color: #334155;
}
.signal-tip svg { width: 17px; height: 17px; color: var(--color-primary); flex: none; margin-top: 2px; }
.signal-tip strong { color: var(--color-primary); margin-right: 6px; }
.signal-tip b { color: var(--color-accent); }

.signal-cell {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}
.signal-cell .cell-label { color: var(--color-muted); }

/* ===== 资产台账 ===== */
.portfolio-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.portfolio-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    position: relative;
    overflow: hidden;
}
.portfolio-card::after {
    content: ""; position: absolute; right: -28px; top: -28px;
    width: 90px; height: 90px; border-radius: 50%;
    opacity: 0.12;
}
.portfolio-card.rotation::after { background: var(--color-secondary); }
.portfolio-card.bond::after { background: var(--color-up); }
.portfolio-card.cash::after { background: var(--color-accent); }
.pc-top { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.pc-icon {
    width: 32px; height: 32px; border-radius: 8px;
    display: grid; place-items: center;
    color: #fff;
}
.pc-icon svg { width: 17px; height: 17px; }
.rotation .pc-icon { background: var(--color-secondary); }
.bond .pc-icon { background: var(--color-up); }
.cash .pc-icon { background: var(--color-accent); }
.pc-label { font-size: 13.5px; font-weight: 600; color: #334155; }
.pc-tag { margin-left: auto; font-size: 11.5px; color: var(--color-muted); background: var(--color-muted-bg); padding: 3px 8px; border-radius: 999px; }
.pc-value { font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--color-fg); }
.pc-holding { margin-top: 6px; font-size: 13px; color: var(--color-muted); }

/* ===== 快照 ===== */
.snapshot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.snapshot-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px;
}
.snapshot-card.up { border-top: 3px solid var(--color-up); }
.snapshot-card.down { border-top: 3px solid var(--color-down); }
.snap-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.snap-name { font-size: 14.5px; font-weight: 700; color: var(--color-fg); }
.snap-code { font-size: 12px; color: var(--color-muted); font-family: var(--font-mono); }
.snap-trend {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 12px; font-weight: 600;
    padding: 4px 9px; border-radius: 999px;
}
.snap-trend.up { color: var(--color-up); background: var(--color-up-bg); }
.snap-trend.down { color: var(--color-down); background: var(--color-down-bg); }
.snap-rows { display: grid; gap: 6px; }
.snap-row { display: flex; justify-content: space-between; font-size: 13px; }
.snap-row .label { color: var(--color-muted); }
.snap-row .val { font-weight: 600; font-variant-numeric: tabular-nums; }
.snap-row .val.up { color: var(--color-up); }
.snap-row .val.down { color: var(--color-down); }
.snap-row .val.warn { color: var(--color-warn); font-weight: 700; }

/* ===== 定投 ===== */
.dca-list { display: grid; gap: 10px; }
.dca-empty {
    font-size: 14px; color: var(--color-muted);
    background: var(--color-muted-bg);
    border-radius: var(--radius-sm);
    padding: 18px 16px;
    text-align: center;
}
.dca-item {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-warn);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 13.5px;
}
.dca-item.l1 { border-left-color: #F59E0B; }
.dca-item.l2 { border-left-color: #EA580C; }
.dca-item.l3 { border-left-color: #DC2626; }
.dca-item.l4 { border-left-color: #7F1D1D; }
.dca-item strong { font-weight: 700; }
.dca-amount { font-weight: 700; color: var(--color-up); font-variant-numeric: tabular-nums; white-space: nowrap; }
.dca-highrisk { color: var(--color-down); font-weight: 700; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.history-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 620px; }
.history-table th {
    text-align: left; font-size: 12.5px; font-weight: 600;
    color: var(--color-muted);
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-muted-bg);
}
.history-table td {
    padding: 11px 12px;
    border-bottom: 1px solid #EFF6FF;
    font-variant-numeric: tabular-nums;
}
.history-table tbody tr { transition: background-color 0.15s ease; }
.history-table tbody tr:hover { background: #F0F6FF; }
.history-table tbody tr:last-child td { border-bottom: none; }
.tag-action {
    display: inline-block; padding: 3px 10px; border-radius: 999px;
    font-size: 12.5px; font-weight: 700;
}
.tag-hold { color: var(--color-up); background: var(--color-up-bg); }
.tag-switch { color: var(--color-warn); background: var(--color-warn-bg); }
.tag-empty { color: var(--color-down); background: var(--color-down-bg); }
.bear-mark { color: var(--color-down); font-weight: 700; }

/* ===== 回测对比 ===== */
.bt-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.bt-card:only-child { grid-column: 1 / -1; width: 100%; max-width: 760px; justify-self: center; }
.bt-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px;
    position: relative;
}
.bt-card.v3 { border-color: #93C5FD; background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 60%); box-shadow: 0 0 0 1px #93C5FD inset, var(--shadow-md); }
.bt-card.v2 { border-color: #BFDBFE; background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 55%); box-shadow: 0 0 0 1px #BFDBFE inset; }
.bt-card.v1 { background: #FFFFFF; }
.bt-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 4px; }
.bt-name { font-size: 15px; font-weight: 700; color: var(--color-heading); }
.bt-rec {
    font-size: 11.5px; font-weight: 700; color: var(--color-primary);
    background: #DBEAFE; padding: 3px 9px; border-radius: 999px;
}
.bt-desc { font-size: 12.5px; color: var(--color-muted); margin-bottom: 14px; }
.bt-metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 14px; }
.bt-cell .label { display: block; font-size: 12px; color: var(--color-muted); margin-bottom: 2px; }
.bt-cell .value { font-size: 17px; font-weight: 700; font-variant-numeric: tabular-nums; }
.bt-cell .value.up { color: var(--color-up); }
.bt-cell .value.down { color: var(--color-down); }
.bt-cell .value.muted { color: var(--color-muted); }
.bt-note { margin: 16px 0 0; font-size: 12.5px; color: var(--color-muted); }

/* ===== 回测对比总览表 ===== */
.bt-compare { margin-bottom: 20px; }
.bt-compare-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 640px; }
.bt-compare-table th {
    text-align: left; font-size: 12.5px; font-weight: 600;
    color: var(--color-muted); padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-muted-bg);
}
.bt-compare-table td {
    padding: 9px 12px;
    border-bottom: 1px solid #EFF6FF;
    font-variant-numeric: tabular-nums;
}
.bt-compare-table td.cmp-label { color: var(--color-muted); font-size: 12.5px; white-space: nowrap; }
.bt-compare-table th.col-v3, .bt-compare-table td.col-v3 {
    background: #F5F9FF;
    box-shadow: inset 3px 0 0 var(--color-secondary);
    font-weight: 700;
}
.bt-compare-table th.col-v3 { color: var(--color-primary); }
.bt-compare-table .up { color: var(--color-up); }
.bt-compare-table .down { color: var(--color-down); }
.bt-compare-table tbody tr:hover td { background: #F0F6FF; }
.bt-compare-table tbody tr:hover td.col-v3 { background: #EAF2FF; }

/* ===== 回测卡片·配置区 ===== */
.bt-cfg {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px 12px;
    background: var(--color-muted-bg);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 14px;
}
.bt-cfg .bt-cell { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.bt-cfg .bt-cell .label { font-size: 12px; color: var(--color-muted); flex: none; }
.bt-cfg .bt-cell .value { font-size: 13px; }

/* ===== 骨架屏 ===== */
.skeleton-card { display: grid; gap: 8px; padding: 4px 0; }
.skeleton {
    display: block;
    height: 14px; border-radius: 6px;
    background: linear-gradient(90deg, #EEF2F7 25%, #E2E8F0 37%, #EEF2F7 63%);
    background-size: 400% 100%;
    animation: shimmer 1.4s ease infinite;
}
.skeleton-line { width: 100%; }
.skeleton-line.short { width: 55%; }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }

/* ===== 页脚 ===== */
.footer { border-top: 1px solid var(--color-border); background: #FFFFFF; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 22px 20px; text-align: center; }
.footer-links { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; font-size: 13.5px; }
.footer-links a { color: var(--color-primary); text-decoration: none; font-weight: 600; }
.footer-links a:hover { text-decoration: underline; }
.footer-links .dot { color: #CBD5E1; }
.disclaimer { margin: 10px 0 0; font-size: 12px; color: var(--color-muted); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .grid-2 { grid-template-columns: 1fr; }
    .signal-grid { grid-template-columns: repeat(2, 1fr); }
    .bt-grid { grid-template-columns: 1fr; }
    .topnav { padding: 0 16px 10px; }
}
@media (min-width: 901px) and (max-width: 1180px) {
    .bt-grid { grid-template-columns: 1fr; }
    .bt-card:only-child { max-width: 760px; }
}
@media (max-width: 640px) {
    .topbar-inner { padding: max(12px, env(safe-area-inset-top, 0px)) 16px 12px; }
    .topbar-right { gap: 8px; }
    .update-time { font-size: 11.5px; }
    .btn { min-height: 44px; }
    .brand-sub { display: none; }
    .container { padding: 0 14px; margin-top: 16px; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .snapshot-grid { grid-template-columns: 1fr; }
    .signal-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .cell-value { font-size: 19px; }
    .card { padding: 16px; }

    /* 历史信号表 → 卡片式（移动端友好） */
    .history-table, .history-table tbody, .history-table tr, .history-table td {
        display: block;
        width: 100%;
    }
    .history-table { min-width: 0; border-collapse: separate; border-spacing: 0; }
    .history-table thead { display: none; }
    .history-table tr {
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        padding: 4px 14px;
        margin-bottom: 10px;
        background: #fff;
    }
    .history-table td {
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px dashed #E9EEF6;
        padding: 7px 0;
        font-size: 13.5px;
    }
    .history-table td:last-child { border-bottom: none; }
    .history-table td::before {
        content: attr(data-label);
        color: var(--color-muted);
        font-size: 12px;
        font-weight: 500;
        flex: none;
        margin-right: 12px;
    }
    .history-table td:first-child { padding-top: 10px; }
    .history-table td:last-child { padding-bottom: 10px; }
}

/* 无障碍: 减少动效 */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
    html { scroll-behavior: auto; }
}