/* ===== 链条更换周期 chain-replacement-cycle ===== 修车铺工单风：米白纸底 + 深棕 #4a3526 × 铜橙 #c47b2a */
.chn-page {
    --chn-bg: #f7f5f1;
    --chn-surface: #ffffff;
    --chn-surface2: #f0ece4;
    --chn-line: #e2dccf;
    --chn-ink: #33291d;
    --chn-dim: #857a6a;
    --chn-accent: #c47b2a;
    --chn-dark: #4a3526;
    --chn-good: #5d8a4e;
    --chn-warn: #b98a2f;
    --chn-bad: #b0503f;
    background: var(--chn-bg);
    color: var(--chn-ink);
    border-radius: 16px;
    padding: 0 0 30px;
    overflow: hidden;
    border: 1px solid var(--chn-line);
}
.chn-inner { padding: 30px 34px 0; }

/* 首屏 */
.chn-hero { display: grid; grid-template-columns: 1.35fr .95fr; gap: 26px; align-items: center; }
.chn-kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; letter-spacing: .14em; color: var(--chn-accent); margin-bottom: 12px; }
.chn-kicker::before { content: ""; width: 22px; height: 3px; background: var(--chn-accent); border-radius: 2px; }
.chn-hero h1 { font-size: 34px; font-weight: 800; margin: 0 0 10px; color: var(--chn-ink); letter-spacing: -.01em; }
.chn-hero-sub { color: var(--chn-dim); line-height: 1.9; margin: 0 0 14px; font-size: 15px; }
.chn-hero-sub b { color: var(--chn-accent); }
.chn-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.chn-chips li { font-size: 12.5px; color: var(--chn-dark); background: var(--chn-surface); border: 1px solid var(--chn-line); border-radius: 999px; padding: 4px 11px; font-weight: 600; }

/* 磨损量规卡 */
.chn-gauge-card { background: var(--chn-surface); border: 1px solid var(--chn-line); border-radius: 14px; padding: 20px 22px; box-shadow: 0 1px 3px rgba(51, 41, 29, .06); }
.chn-gauge-title { font-size: 13px; font-weight: 700; color: var(--chn-dim); margin-bottom: 14px; letter-spacing: .08em; }
.chn-gauge-band { position: relative; height: 14px; border-radius: 7px; background: var(--chn-surface2); overflow: visible; }
.chn-gauge-zone { position: absolute; top: 0; height: 100%; border-radius: 7px 0 0 7px; opacity: .85; }
.chn-gauge-zone + .chn-gauge-zone { border-radius: 0; }
.chn-gauge-needle { position: absolute; top: -7px; left: 0; width: 4px; height: 28px; border-radius: 2px; background: var(--chn-dark); box-shadow: 0 0 0 2px #fff; }
.chn-gauge-scale { display: flex; justify-content: space-between; font-size: 11px; color: var(--chn-dim); margin-top: 7px; font-variant-numeric: tabular-nums; }
.chn-gauge-num { margin-top: 16px; text-align: center; }
.chn-gauge-num span { font-size: 44px; font-weight: 800; color: var(--chn-dark); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.chn-gauge-num em { font-style: normal; font-size: 13px; color: var(--chn-dim); margin-left: 6px; }
.chn-gauge-tag { text-align: center; font-size: 12.5px; color: var(--chn-dim); margin: 4px 0 0; min-height: 18px; }

/* 面板 */
.chn-main { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; margin-top: 24px; }
.chn-panel { background: var(--chn-surface); border: 1px solid var(--chn-line); border-radius: 14px; padding: 20px 22px; box-shadow: 0 1px 3px rgba(51, 41, 29, .04); }
.chn-panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.chn-step { width: 24px; height: 24px; border-radius: 7px; background: var(--chn-dark); color: #fff; font-weight: 700; font-size: 12.5px; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.chn-panel-head h2 { margin: 0; font-size: 16.5px; }
.chn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.chn-field span { display: block; font-size: 12.5px; color: var(--chn-dim); margin-bottom: 5px; font-weight: 600; }
.chn-field input, .chn-field select { width: 100%; box-sizing: border-box; background: var(--chn-surface2); border: 1px solid var(--chn-line); border-radius: 8px; color: var(--chn-ink); padding: 9px 11px; font-size: 15px; font-variant-numeric: tabular-nums; }
.chn-field input:focus, .chn-field select:focus { outline: 2px solid rgba(196, 123, 42, .25); border-color: var(--chn-accent); }
.chn-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.chn-btn { border: 1px solid var(--chn-accent); background: var(--chn-accent); color: #fff; border-radius: 8px; padding: 9px 18px; font-size: 14px; font-weight: 600; cursor: pointer; }
.chn-btn:hover { background: #a96922; }
.chn-btn-copy { background: transparent; color: var(--chn-accent); }
.chn-btn-copy:hover { background: rgba(196, 123, 42, .07); }
.chn-btn-dl { background: transparent; border-color: var(--chn-line); color: var(--chn-dim); font-weight: 500; }
.chn-err { color: var(--chn-bad); font-size: 13px; margin: 10px 0 0; }
/* 结果 */
.chn-result { margin: 0; }
.chn-result > div { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px dashed var(--chn-line); padding: 8px 0; }
.chn-result > div:last-child { border-bottom: 0; }
.chn-result dt { color: var(--chn-dim); font-size: 13px; }
.chn-result dd { margin: 0; font-size: 15px; font-weight: 700; color: var(--chn-ink); font-variant-numeric: tabular-nums; }
.chn-result dd b { font-size: 26px; color: var(--chn-accent); }
.chn-lifebar { margin: 14px 0 6px; }
.chn-lifebar-track { height: 12px; border-radius: 6px; background: var(--chn-surface2); overflow: hidden; }
.chn-lifebar-fill { height: 100%; width: 0; border-radius: 6px; background: linear-gradient(90deg, var(--chn-good), var(--chn-warn)); }
.chn-lifebar-labels { display: flex; justify-content: space-between; font-size: 11px; color: var(--chn-dim); margin-top: 6px; }
.chn-note { font-size: 12.5px; color: var(--chn-dim); line-height: 1.8; margin: 10px 0 0; }

/* 成本账 */
.chn-cost { margin-top: 24px; }
.chn-cost-tip { font-size: 13px; color: var(--chn-dim); margin: 0 0 14px; line-height: 1.8; }
.chn-cost-out { margin-top: 16px; }
.chn-cost-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; }
.chn-cost-card { border-radius: 12px; padding: 16px 18px; text-align: center; }
.chn-cost-ok { background: rgba(93, 138, 78, .1); border: 1px solid rgba(93, 138, 78, .35); }
.chn-cost-no { background: rgba(176, 80, 63, .08); border: 1px solid rgba(176, 80, 63, .35); }
.chn-cost-card h4 { margin: 0 0 6px; font-size: 13.5px; color: var(--chn-dim); }
.chn-cost-num { margin: 0; font-size: 28px; font-weight: 800; font-variant-numeric: tabular-nums; }
.chn-cost-ok .chn-cost-num { color: var(--chn-good); }
.chn-cost-no .chn-cost-num { color: var(--chn-bad); }
.chn-cost-sub { margin: 4px 0 0; font-size: 12px; color: var(--chn-dim); }
.chn-cost-vs { font-weight: 800; color: var(--chn-dim); font-size: 15px; }
.chn-cost-note { font-size: 12.5px; color: var(--chn-dim); margin: 12px 0 0; line-height: 1.8; }

/* 表格 / 批量 */
.chn-table { margin-top: 24px; background: var(--chn-surface); border: 1px solid var(--chn-line); border-radius: 14px; padding: 20px 22px; }
.chn-table h2 { font-size: 17px; margin: 0 0 6px; }
.chn-table-sub { font-size: 13px; color: var(--chn-dim); margin: 0 0 12px; }
.chn-table-scroll { overflow-x: auto; }
.chn-table table { width: 100%; border-collapse: collapse; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.chn-table th { background: var(--chn-dark); color: #fff; font-weight: 600; padding: 8px 10px; text-align: center; white-space: nowrap; }
.chn-table th:first-child { text-align: left; }
.chn-table td { border-top: 1px solid var(--chn-line); padding: 7px 10px; text-align: center; color: var(--chn-ink); }
.chn-table td:first-child { text-align: left; font-weight: 600; }
.chn-batch { margin-top: 24px; }
.chn-batch textarea { width: 100%; box-sizing: border-box; background: var(--chn-surface2); border: 1px solid var(--chn-line); border-radius: 8px; color: var(--chn-ink); padding: 10px 12px; font-size: 14px; font-family: Consolas, monospace; resize: vertical; }
.chn-batch-tip { font-size: 13px; color: var(--chn-dim); margin: 0 0 8px; }
.chn-batch-out { margin-top: 14px; overflow-x: auto; }
.chn-batch-out table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.chn-batch-out th { background: var(--chn-surface2); padding: 7px 10px; color: var(--chn-dim); text-align: left; white-space: nowrap; }
.chn-batch-out td { border-top: 1px solid var(--chn-line); padding: 6px 10px; }

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

.chn-toast { position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(16px); background: var(--chn-dark); 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; }
.chn-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 900px) {
    .chn-inner { padding: 24px 18px 0; }
    .chn-hero { grid-template-columns: 1fr; }
    .chn-main { grid-template-columns: 1fr; }
    .chn-cost-row { grid-template-columns: 1fr; }
    .chn-cost-vs { text-align: center; }
}

/* 深色：夜间车铺 */
:root[data-theme="dark"] .chn-page, :root[data-theme="dark"] .chn-toast {
    --chn-bg: #17130e;
    --chn-surface: #201a13;
    --chn-surface2: #2a2219;
    --chn-line: #3a3022;
    --chn-ink: #f0e9dd;
    --chn-dim: #b3a68f;
    --chn-accent: #e09a45;
    --chn-dark: #e8dcc8;
    --chn-good: #8fb573;
    --chn-warn: #d9b35c;
    --chn-bad: #d97a5f;
}
:root[data-theme="dark"] .chn-gauge-needle { box-shadow: 0 0 0 2px #17130e; }
:root[data-theme="dark"] .chn-step { background: var(--chn-accent); color: #1c130a; }
:root[data-theme="dark"] .chn-btn { background: var(--chn-accent); border-color: var(--chn-accent); color: #1c130a; }
:root[data-theme="dark"] .chn-btn:hover { background: #eaab60; }
:root[data-theme="dark"] .chn-btn-copy { background: transparent; color: var(--chn-accent); }
:root[data-theme="dark"] .chn-btn-copy:hover { background: rgba(224, 154, 69, .08); }
:root[data-theme="dark"] .chn-table th { background: #2a2219; color: #e8dcc8; }