/* ===== 踏频计算 cadence-calc ===== 公路车码表风：纸白默认 + 深夜仪表盘，胭脂红 #d7263d × 藏蓝 #16233a */
.cad-page {
    --cad-bg: #f6f7f9;
    --cad-surface: #ffffff;
    --cad-surface2: #f2f4f8;
    --cad-line: #e4e7ee;
    --cad-ink: #1d2330;
    --cad-dim: #667085;
    --cad-accent: #d7263d;
    --cad-navy: #16233a;
    --cad-good: #1f9d55;
    --cad-warn: #c77700;
    --cad-bad: #c0392b;
    background: var(--cad-bg);
    color: var(--cad-ink);
    border-radius: 16px;
    padding: 0 0 30px;
    overflow: hidden;
    border: 1px solid var(--cad-line);
}

/* ---------- 顶部横幅：车队条纹 ---------- */
.cad-band {
    height: 6px;
    background: linear-gradient(90deg, var(--cad-accent) 0 30%, var(--cad-navy) 30% 55%, #e8eaef 55% 72%, var(--cad-navy) 72% 86%, var(--cad-accent) 86% 100%);
}
.cad-inner { padding: 30px 34px 0; }

/* ---------- 首屏 ---------- */
.cad-hero { display: grid; grid-template-columns: 1.35fr .95fr; gap: 26px; align-items: center; }
.cad-kicker {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 700; letter-spacing: .16em;
    color: var(--cad-accent); margin-bottom: 12px;
}
.cad-kicker::before { content: ""; width: 22px; height: 3px; background: var(--cad-accent); border-radius: 2px; }
.cad-hero h1 { font-size: 34px; font-weight: 800; margin: 0 0 10px; letter-spacing: -.01em; color: var(--cad-ink); }
.cad-hero-sub { color: var(--cad-dim); line-height: 1.9; margin: 0 0 14px; font-size: 15px; }
.cad-hero-sub b { color: var(--cad-accent); }
.cad-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.cad-chips li { font-size: 12.5px; color: var(--cad-navy); background: var(--cad-surface); border: 1px solid var(--cad-line); border-radius: 6px; padding: 4px 10px; font-weight: 600; }

/* 码表仪表盘 */
.cad-dash {
    background: var(--cad-surface); border: 1px solid var(--cad-line);
    border-radius: 14px; padding: 18px 18px 14px; text-align: center;
    box-shadow: 0 1px 3px rgba(16, 24, 40, .05);
}
.cad-dash svg { width: 100%; max-width: 300px; display: block; margin: 0 auto; }
.cad-gauge-track { fill: none; stroke: var(--cad-surface2); stroke-width: 14; }
.cad-gauge-zone { fill: none; stroke: var(--cad-good); stroke-width: 14; opacity: .9; }
.cad-gauge-arc { fill: none; stroke: var(--cad-accent); stroke-width: 14; stroke-linecap: round; stroke-dasharray: 282.8; stroke-dashoffset: 282.8; }
.cad-gauge-tick { stroke: var(--cad-line); stroke-width: 2; }
.cad-gauge-tick-label { font-size: 9px; fill: var(--cad-dim); }
.cad-gauge-needle { stroke: var(--cad-navy); stroke-width: 3.5; stroke-linecap: round; }
.cad-gauge-hub { fill: var(--cad-navy); }
.cad-dash-num { margin-top: -6px; }
.cad-dash-num span { font-size: 46px; font-weight: 800; color: var(--cad-navy); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.cad-dash-num em { font-style: normal; font-size: 13px; color: var(--cad-dim); margin-left: 6px; }
.cad-dash-tag { font-size: 12.5px; color: var(--cad-dim); margin: 4px 0 0; min-height: 18px; }

/* ---------- 面板 ---------- */
.cad-main { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; margin-top: 24px; }
.cad-panel { background: var(--cad-surface); border: 1px solid var(--cad-line); border-radius: 14px; padding: 20px 22px; box-shadow: 0 1px 3px rgba(16, 24, 40, .04); }
.cad-panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.cad-step { width: 24px; height: 24px; border-radius: 7px; background: var(--cad-navy); color: #fff; font-weight: 700; font-size: 12.5px; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.cad-panel-head h2 { margin: 0; font-size: 16.5px; color: var(--cad-ink); }
.cad-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cad-field span { display: block; font-size: 12.5px; color: var(--cad-dim); margin-bottom: 5px; font-weight: 600; }
.cad-field input, .cad-field select {
    width: 100%; box-sizing: border-box; background: var(--cad-surface2);
    border: 1px solid var(--cad-line); border-radius: 8px; color: var(--cad-ink);
    padding: 9px 11px; font-size: 15px; font-variant-numeric: tabular-nums;
}
.cad-field input:focus, .cad-field select:focus { outline: 2px solid rgba(215, 38, 61, .25); border-color: var(--cad-accent); }
.cad-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.cad-btn { border: 1px solid var(--cad-accent); background: var(--cad-accent); color: #fff; border-radius: 8px; padding: 9px 18px; font-size: 14px; font-weight: 600; cursor: pointer; }
.cad-btn:hover { background: #b71f33; }
.cad-btn-copy { background: transparent; color: var(--cad-accent); }
.cad-btn-copy:hover { background: rgba(215, 38, 61, .06); }
.cad-btn-dl { background: transparent; border-color: var(--cad-line); color: var(--cad-dim); font-weight: 500; }
.cad-btn-dl:hover { border-color: var(--cad-dim); background: transparent; }
.cad-err { color: var(--cad-bad); font-size: 13px; margin: 10px 0 0; }

/* 结果 */
.cad-result { margin: 0; }
.cad-result > div { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px dashed var(--cad-line); padding: 8px 0; }
.cad-result > div:last-child { border-bottom: 0; }
.cad-result dt { color: var(--cad-dim); font-size: 13px; }
.cad-result dd { margin: 0; font-size: 15px; font-weight: 700; color: var(--cad-ink); font-variant-numeric: tabular-nums; }
.cad-result dd b { font-size: 26px; color: var(--cad-accent); }
.cad-zone-bar { margin: 14px 0 6px; }
.cad-zone-bar-track { height: 10px; border-radius: 5px; background: linear-gradient(90deg, #d9dee7 0 30.7%, #f3c1c8 30.7% 46.2%, var(--cad-good) 46.2% 57.7%, #d9dee7 57.7% 100%); position: relative; }
.cad-zone-marker { position: absolute; top: -5px; width: 4px; height: 20px; border-radius: 2px; background: var(--cad-navy); left: 0; box-shadow: 0 0 0 2px #fff; }
.cad-zone-labels { display: flex; justify-content: space-between; font-size: 11px; color: var(--cad-dim); margin-top: 6px; }
.cad-note { font-size: 12.5px; color: var(--cad-dim); line-height: 1.8; margin: 10px 0 0; }
/* ---------- 档位规划 / 速查表 ---------- */
.cad-planner, .cad-table { margin-top: 24px; background: var(--cad-surface); border: 1px solid var(--cad-line); border-radius: 14px; padding: 20px 22px; box-shadow: 0 1px 3px rgba(16, 24, 40, .04); }
.cad-planner-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 12px; }
.cad-planner-head h2 { margin: 0; font-size: 16.5px; }
.cad-planner-head label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--cad-dim); font-weight: 600; }
.cad-planner-head input, .cad-planner-head select { width: 130px; background: var(--cad-surface2); border: 1px solid var(--cad-line); border-radius: 7px; padding: 7px 10px; font-size: 14px; color: var(--cad-ink); }
.cad-planner-sub { font-size: 13px; color: var(--cad-dim); margin: 0 0 12px; }
.cad-table-scroll { overflow-x: auto; }
.cad-planner table, .cad-table table { width: 100%; border-collapse: collapse; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.cad-planner th, .cad-table th { background: var(--cad-navy); color: #fff; font-weight: 600; padding: 8px 10px; text-align: center; white-space: nowrap; }
.cad-planner th:first-child, .cad-table th:first-child { text-align: left; border-radius: 0; }
.cad-planner td, .cad-table td { border-top: 1px solid var(--cad-line); padding: 7px 10px; color: var(--cad-ink); text-align: center; }
.cad-planner td:first-child, .cad-table td:first-child { text-align: left; font-weight: 600; }
.cad-planner tr.cad-fit td { background: rgba(31, 157, 85, .1); color: var(--cad-good); font-weight: 700; }
.cad-planner tr.cad-low td { color: var(--cad-warn); }
.cad-planner tr.cad-high td { color: var(--cad-bad); }
.cad-planner .cad-fit-badge { display: inline-block; font-size: 11px; background: var(--cad-good); color: #fff; border-radius: 4px; padding: 1px 6px; margin-left: 6px; }

/* ---------- 批量 ---------- */
.cad-batch { margin-top: 24px; }
.cad-batch .cad-panel { padding: 20px 22px; }
.cad-batch textarea { width: 100%; box-sizing: border-box; background: var(--cad-surface2); border: 1px solid var(--cad-line); border-radius: 8px; color: var(--cad-ink); padding: 10px 12px; font-size: 14px; font-family: Consolas, monospace; resize: vertical; }
.cad-batch-tip { font-size: 13px; color: var(--cad-dim); margin: 0 0 8px; }
.cad-batch-out { margin-top: 14px; overflow-x: auto; }
.cad-batch-out table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.cad-batch-out th { background: var(--cad-surface2); padding: 7px 10px; color: var(--cad-dim); text-align: left; white-space: nowrap; }
.cad-batch-out td { border-top: 1px solid var(--cad-line); padding: 6px 10px; color: var(--cad-ink); }

/* ---------- 易错点 ---------- */
.cad-risk { margin-top: 24px; }
.cad-risk h2 { font-size: 18px; margin: 0 0 12px; }
.cad-risk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.cad-risk-card { background: var(--cad-surface); border: 1px solid var(--cad-line); border-top: 3px solid var(--cad-accent); border-radius: 10px; padding: 14px 16px; }
.cad-risk-card h3 { margin: 0 0 6px; font-size: 14.5px; color: var(--cad-ink); }
.cad-risk-card p { margin: 0; font-size: 13px; color: var(--cad-dim); line-height: 1.85; }
.cad-risk-card b { color: var(--cad-accent); }

/* ---------- toast ---------- */
.cad-toast { position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(16px); background: var(--cad-navy); color: #fff; border-radius: 9px; padding: 10px 22px; font-size: 14px; font-weight: 600; opacity: 0; pointer-events: none; transition: opacity .22s ease, transform .22s ease; z-index: 99; }
.cad-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 900px) {
    .cad-inner { padding: 24px 18px 0; }
    .cad-hero { grid-template-columns: 1fr; }
    .cad-main { grid-template-columns: 1fr; }
}

/* ---------- 深色：深夜仪表盘 ---------- */
:root[data-theme="dark"] .cad-page, :root[data-theme="dark"] .cad-toast {
    --cad-bg: #12161d;
    --cad-surface: #1a2029;
    --cad-surface2: #232b37;
    --cad-line: #2d3745;
    --cad-ink: #e8ecf3;
    --cad-dim: #98a4b5;
    --cad-accent: #ff5470;
    --cad-navy: #a8c0e8;
    --cad-good: #4ade80;
    --cad-warn: #fbbf24;
    --cad-bad: #f87171;
}
:root[data-theme="dark"] .cad-band { background: linear-gradient(90deg, var(--cad-accent) 0 30%, #33415c 30% 55%, #2d3745 55% 72%, #33415c 72% 86%, var(--cad-accent) 86% 100%); }
:root[data-theme="dark"] .cad-chips li { color: #c7d2e2; }
:root[data-theme="dark"] .cad-dash, :root[data-theme="dark"] .cad-panel,
:root[data-theme="dark"] .cad-planner, :root[data-theme="dark"] .cad-table,
:root[data-theme="dark"] .cad-risk-card { box-shadow: none; }
:root[data-theme="dark"] .cad-dash-num span { color: #f2f5fa; }
:root[data-theme="dark"] .cad-gauge-needle { stroke: #f2f5fa; }
:root[data-theme="dark"] .cad-gauge-hub { fill: #f2f5fa; }
:root[data-theme="dark"] .cad-planner th, :root[data-theme="dark"] .cad-table th { background: #232b37; color: #c7d2e2; }
:root[data-theme="dark"] .cad-planner tr.cad-fit td { background: rgba(74, 222, 128, .1); }
:root[data-theme="dark"] .cad-zone-marker { box-shadow: 0 0 0 2px #12161d; }
:root[data-theme="dark"] .cad-btn { background: var(--cad-accent); border-color: var(--cad-accent); color: #1a0c10; }
:root[data-theme="dark"] .cad-btn:hover { background: #ff6b83; }
:root[data-theme="dark"] .cad-btn-copy { background: transparent; color: var(--cad-accent); }
:root[data-theme="dark"] .cad-btn-copy:hover { background: rgba(255, 84, 112, .08); }