/* ===== 背包负重 backpack-load-calc ===== 户外装备清单风：浅卡其底 + 军绿 #4d5d3a × 陶土 #cf9046 */
.bpk-page {
    --bpk-bg: #f4f5ef;
    --bpk-surface: #ffffff;
    --bpk-surface2: #eceee2;
    --bpk-line: #dfe2d0;
    --bpk-ink: #2c3324;
    --bpk-dim: #7c8470;
    --bpk-green: #4d5d3a;
    --bpk-khaki: #b7a77a;
    --bpk-accent: #cf9046;
    --bpk-bad: #b0503f;
    --bpk-good: #5d8a4e;
    background: var(--bpk-bg);
    color: var(--bpk-ink);
    border-radius: 16px;
    padding: 0 0 30px;
    overflow: hidden;
    border: 1px solid var(--bpk-line);
}
.bpk-inner { padding: 30px 34px 0; }

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

/* 天平 */
.bpk-dial { background: var(--bpk-surface); border: 1px solid var(--bpk-line); border-radius: 14px; padding: 18px 18px 14px; text-align: center; box-shadow: 0 1px 3px rgba(44, 51, 36, .06); }
.bpk-dial svg { width: 100%; max-width: 280px; display: block; margin: 0 auto; }
.bpk-dial-base { stroke: var(--bpk-khaki); stroke-width: 5; stroke-linecap: round; }
.bpk-dial-post { fill: var(--bpk-khaki); }
.bpk-dial-beam { fill: var(--bpk-green); }
.bpk-dial-pan { fill: var(--bpk-accent); }
.bpk-dial-label { font-size: 10px; fill: var(--bpk-dim); font-weight: 700; }
.bpk-dial-num span { font-size: 44px; font-weight: 800; color: var(--bpk-green); font-variant-numeric: tabular-nums; }
.bpk-dial-num em { font-style: normal; font-size: 13px; color: var(--bpk-dim); margin-left: 6px; }
.bpk-dial-tag { font-size: 12.5px; color: var(--bpk-dim); margin: 4px 0 0; min-height: 18px; }

/* 面板 */
.bpk-main { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; margin-top: 24px; }
.bpk-panel { background: var(--bpk-surface); border: 1px solid var(--bpk-line); border-radius: 14px; padding: 20px 22px; box-shadow: 0 1px 3px rgba(44, 51, 36, .04); }
.bpk-panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.bpk-step { width: 26px; height: 24px; border-radius: 7px; background: var(--bpk-green); color: #fff; font-weight: 700; font-size: 11.5px; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.bpk-panel-head h2 { margin: 0; font-size: 16.5px; }
.bpk-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.bpk-field span { display: block; font-size: 12.5px; color: var(--bpk-dim); margin-bottom: 5px; font-weight: 600; }
.bpk-field input, .bpk-field select { width: 100%; box-sizing: border-box; background: var(--bpk-surface2); border: 1px solid var(--bpk-line); border-radius: 8px; color: var(--bpk-ink); padding: 9px 11px; font-size: 15px; font-variant-numeric: tabular-nums; }
.bpk-field input:focus, .bpk-field select:focus { outline: 2px solid rgba(77, 93, 58, .25); border-color: var(--bpk-green); }
.bpk-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.bpk-btn { border: 1px solid var(--bpk-green); background: var(--bpk-green); color: #fff; border-radius: 8px; padding: 9px 16px; font-size: 14px; font-weight: 600; cursor: pointer; }
.bpk-btn:hover { background: #3e4c2f; }
.bpk-btn-ai { background: var(--bpk-accent); border-color: var(--bpk-accent); }
.bpk-btn-ai:hover { background: #b87c39; }
.bpk-btn-ai:disabled { opacity: .55; cursor: not-allowed; }
.bpk-btn-copy { background: transparent; color: var(--bpk-green); }
.bpk-btn-copy:hover { background: rgba(77, 93, 58, .07); }
.bpk-btn-dl { background: transparent; border-color: var(--bpk-line); color: var(--bpk-dim); font-weight: 500; }
.bpk-err { color: var(--bpk-bad); font-size: 13px; margin: 10px 0 0; }

.bpk-result { margin: 0; }
.bpk-result > div { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px dashed var(--bpk-line); padding: 8px 0; }
.bpk-result > div:last-child { border-bottom: 0; }
.bpk-result dt { color: var(--bpk-dim); font-size: 13px; }
.bpk-result dd { margin: 0; font-size: 15px; font-weight: 700; font-variant-numeric: tabular-nums; }
.bpk-result dd b { font-size: 26px; color: var(--bpk-green); }
.bpk-scale { margin: 14px 0 6px; }
.bpk-scale-track { position: relative; height: 12px; border-radius: 6px; background: var(--bpk-surface2); }
.bpk-scale-seg { position: absolute; top: 0; height: 100%; opacity: .9; }
.bpk-scale-seg:first-child { border-radius: 6px 0 0 6px; }
.bpk-scale-marker { position: absolute; top: -6px; width: 4px; height: 24px; border-radius: 2px; background: var(--bpk-ink); box-shadow: 0 0 0 2px #fff; }
.bpk-scale-labels { display: flex; justify-content: space-between; font-size: 11px; color: var(--bpk-dim); margin-top: 6px; }
.bpk-note { font-size: 12.5px; color: var(--bpk-dim); line-height: 1.8; margin: 10px 0 0; }

/* AI */
.bpk-ai { margin-top: 16px; }
.bpk-ai-status { font-size: 13px; color: var(--bpk-dim); margin: 0 0 10px; }
.bpk-ai-box p { margin: 0 0 8px; font-size: 14px; line-height: 1.85; color: var(--bpk-ink); }
.bpk-ai-box p:first-letter { }

/* 装备清单 */
.bpk-kit { margin-top: 16px; }
.bpk-kit-tip { font-size: 13px; color: var(--bpk-dim); margin: 0 0 12px; }
.bpk-kit-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.bpk-kit-item { display: flex; align-items: center; gap: 7px; background: var(--bpk-surface2); border: 1px solid var(--bpk-line); border-radius: 8px; padding: 7px 9px; font-size: 13px; cursor: pointer; }
.bpk-kit-item:has(input:checked) { border-color: var(--bpk-green); background: rgba(77, 93, 58, .08); }
.bpk-kit-item input { width: 15px; height: 15px; accent-color: var(--bpk-green); flex: none; }
.bpk-kit-item em { font-style: normal; color: var(--bpk-dim); font-size: 11.5px; margin-left: auto; font-variant-numeric: tabular-nums; }
.bpk-kit-item input.grams { width: 56px; padding: 2px 5px; font-size: 12px; border: 1px solid transparent; background: transparent; border-radius: 5px; text-align: right; }
.bpk-kit-item input.grams:hover, .bpk-kit-item input.grams:focus { border-color: var(--bpk-line); background: var(--bpk-surface); }
.bpk-kit-foot { display: flex; align-items: center; gap: 14px; margin-top: 14px; }
.bpk-kit-sum { font-size: 14px; color: var(--bpk-dim); }
.bpk-kit-sum b { color: var(--bpk-green); font-size: 18px; font-variant-numeric: tabular-nums; }
/* 批量 */
.bpk-batch { margin-top: 16px; }
.bpk-batch textarea { width: 100%; box-sizing: border-box; background: var(--bpk-surface2); border: 1px solid var(--bpk-line); border-radius: 8px; color: var(--bpk-ink); padding: 10px 12px; font-size: 14px; font-family: Consolas, monospace; resize: vertical; }
.bpk-batch-tip { font-size: 13px; color: var(--bpk-dim); margin: 0 0 8px; }
.bpk-batch-out { margin-top: 14px; overflow-x: auto; }
.bpk-batch-out table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.bpk-batch-out th { background: var(--bpk-surface2); padding: 7px 10px; color: var(--bpk-dim); text-align: left; white-space: nowrap; }
.bpk-batch-out td { border-top: 1px solid var(--bpk-line); padding: 6px 10px; }
.bpk-batch-out td.bpk-no { color: var(--bpk-bad); font-weight: 700; }

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

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

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

/* 深色：营地夜色 */
:root[data-theme="dark"] .bpk-page, :root[data-theme="dark"] .bpk-toast {
    --bpk-bg: #161a12;
    --bpk-surface: #1e2418;
    --bpk-surface2: #283020;
    --bpk-line: #39432c;
    --bpk-ink: #edf1e4;
    --bpk-dim: #a8b295;
    --bpk-green: #a3c184;
    --bpk-khaki: #c9bd96;
    --bpk-accent: #e0a35d;
    --bpk-bad: #d97a5f;
    --bpk-good: #8fb573;
}
:root[data-theme="dark"] .bpk-step { background: var(--bpk-accent); color: #241a0e; }
:root[data-theme="dark"] .bpk-btn { background: var(--bpk-green); border-color: var(--bpk-green); color: #16200f; }
:root[data-theme="dark"] .bpk-btn:hover { background: #b4d296; }
:root[data-theme="dark"] .bpk-btn-ai { background: var(--bpk-accent); border-color: var(--bpk-accent); color: #241a0e; }
:root[data-theme="dark"] .bpk-btn-ai:hover { background: #eab575; }
:root[data-theme="dark"] .bpk-btn-copy { background: transparent; color: var(--bpk-green); }
:root[data-theme="dark"] .bpk-scale-marker { box-shadow: 0 0 0 2px #161a12; }
:root[data-theme="dark"] .bpk-risk-card { border-left-color: var(--bpk-khaki); }