/* ==========================================================================
   Life Lab · 生活与行业实用计算（第十六章 291-300）专用设计系统
   - 配色：纸白 + 墨黑 + 松绿，强调色暖橙；与既有 tk-/as- 体系完全隔离
   - 主题：默认跟随系统（布局内联脚本已处理），手动切换写入 localStorage.theme
   - 排版：衬线标题 + 无衬线正文 + 等宽数字，四层字号阶梯
   ========================================================================== */

.ll-page {
    --ll-bg: #f7f5ef;
    --ll-bg-soft: #efece1;
    --ll-card: #fffdf8;
    --ll-card-2: #fbf8f0;
    --ll-ink: #171a18;
    --ll-ink-2: #38423d;
    --ll-muted: #6f7a74;
    --ll-line: #e2dccd;
    --ll-line-strong: #cfc6b2;
    --ll-accent: #0f766e;
    --ll-accent-ink: #0b5b55;
    --ll-accent-soft: #e3f2ef;
    --ll-warm: #b45309;
    --ll-warm-soft: #fbefdd;
    --ll-danger: #b3261e;
    --ll-danger-soft: #fbeae7;
    --ll-ok: #166534;
    --ll-ok-soft: #e7f4e9;
    --ll-shadow: 0 1px 2px rgba(23, 26, 24, .04), 0 14px 32px -22px rgba(23, 26, 24, .35);
    --ll-radius: 16px;
    --ll-radius-sm: 10px;
    --ll-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
    --ll-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
    --ll-mono: ui-monospace, SFMono-Regular, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
    background: var(--ll-bg);
    color: var(--ll-ink);
    font-family: var(--ll-sans);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

:root[data-theme="dark"] .ll-page {
    --ll-bg: #0f1412;
    --ll-bg-soft: #141a17;
    --ll-card: #161d19;
    --ll-card-2: #1a221e;
    --ll-ink: #eef2ec;
    --ll-ink-2: #c7d0c9;
    --ll-muted: #93a09a;
    --ll-line: #273029;
    --ll-line-strong: #3a463d;
    --ll-accent: #4ecdc0;
    --ll-accent-ink: #7ee0d4;
    --ll-accent-soft: #12312d;
    --ll-warm: #e0a35c;
    --ll-warm-soft: #332414;
    --ll-danger: #f08b83;
    --ll-danger-soft: #341b18;
    --ll-ok: #7ddc9a;
    --ll-ok-soft: #16301f;
    --ll-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 18px 40px -26px rgba(0, 0, 0, .8);
}

.ll-page *,
.ll-page *::before,
.ll-page *::after { box-sizing: border-box; }

.ll-shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 22px 20px 72px;
}

/* ---------- 面包屑 ---------- */
.ll-crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    font-size: 12.5px;
    color: var(--ll-muted);
    margin-bottom: 14px;
}
.ll-crumb a { color: var(--ll-muted); text-decoration: none; }
.ll-crumb a:hover { color: var(--ll-accent); text-decoration: underline; }
.ll-crumb .sep { opacity: .5; }
.ll-crumb b { color: var(--ll-ink-2); font-weight: 600; }

/* ---------- 首屏 ---------- */
.ll-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: start;
    padding: 2px 0 16px;
    border-bottom: 1px solid var(--ll-line);
    margin-bottom: 18px;
}
.ll-kicker {
    font-family: var(--ll-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--ll-accent);
    margin-bottom: 10px;
}
.ll-h1 {
    margin: 0 0 10px;
    font-family: var(--ll-serif);
    font-weight: 700;
    font-size: clamp(26px, 3.4vw, 40px);
    line-height: 1.2;
    letter-spacing: -.01em;
    color: var(--ll-ink);
}
.ll-h1 em {
    font-style: normal;
    color: var(--ll-accent);
    background: linear-gradient(transparent 62%, var(--ll-accent-soft) 62%);
    padding: 0 2px;
}
.ll-lede {
    margin: 0 0 12px;
    max-width: 64ch;
    font-size: 15px;
    line-height: 1.8;
    color: var(--ll-ink-2);
}
.ll-lede b { color: var(--ll-ink); }
.ll-quick {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.ll-quick li {
    font-size: 12.5px;
    color: var(--ll-ink-2);
    background: var(--ll-card);
    border: 1px solid var(--ll-line);
    border-radius: 999px;
    padding: 5px 12px;
    white-space: nowrap;
}
.ll-quick b {
    font-family: var(--ll-mono);
    color: var(--ll-accent-ink);
    margin-right: 4px;
}
.ll-hero-side {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    padding-top: 4px;
}
.ll-theme {
    display: inline-flex;
    background: var(--ll-card);
    border: 1px solid var(--ll-line);
    border-radius: 999px;
    padding: 3px;
    gap: 2px;
}
.ll-theme button {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--ll-muted);
    font: 600 12px/1 var(--ll-sans);
    padding: 6px 11px;
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.ll-theme button:hover { color: var(--ll-ink); }
.ll-theme button[aria-pressed="true"] {
    background: var(--ll-accent-soft);
    color: var(--ll-accent-ink);
    box-shadow: inset 0 0 0 1px var(--ll-accent);
}
.ll-jump {
    font-size: 12.5px;
    color: var(--ll-muted);
    text-decoration: none;
    border-bottom: 1px dashed var(--ll-line-strong);
    padding-bottom: 1px;
}
.ll-jump:hover { color: var(--ll-accent); border-color: var(--ll-accent); }

/* ---------- 工作台 ---------- */
.ll-workspace {
    display: grid;
    grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    margin-bottom: 30px;
    scroll-margin-top: 80px;
}
.ll-panel {
    background: var(--ll-card);
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius);
    box-shadow: var(--ll-shadow);
    padding: 16px;
}
.ll-panel-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.ll-panel-head h2 {
    margin: 0;
    font-family: var(--ll-sans);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .01em;
    color: var(--ll-ink);
    flex: 1;
}
.ll-step {
    font-family: var(--ll-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--ll-accent-ink);
    background: var(--ll-accent-soft);
    border-radius: 6px;
    padding: 3px 6px;
    line-height: 1;
}

/* ---------- 表单 ---------- */
.ll-form { position: sticky; top: 78px; }
.ll-field { margin-bottom: 11px; }
.ll-field:last-of-type { margin-bottom: 14px; }
.ll-label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--ll-ink-2);
    margin-bottom: 5px;
}
.ll-label span {
    font-weight: 400;
    color: var(--ll-muted);
}
.ll-input,
.ll-select {
    display: block;
    width: 100%;
    height: 36px;
    padding: 0 10px;
    font: 500 14px/1.2 var(--ll-mono);
    font-variant-numeric: tabular-nums;
    color: var(--ll-ink);
    background: var(--ll-card-2);
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
    -webkit-appearance: none;
    appearance: none;
}
.ll-select {
    font-family: var(--ll-sans);
    background-image: linear-gradient(45deg, transparent 50%, var(--ll-muted) 50%), linear-gradient(135deg, var(--ll-muted) 50%, transparent 50%);
    background-position: calc(100% - 15px) 16px, calc(100% - 10px) 16px;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    padding-right: 26px;
}
.ll-input:focus,
.ll-select:focus {
    border-color: var(--ll-accent);
    box-shadow: 0 0 0 3px var(--ll-accent-soft);
}
.ll-input[aria-invalid="true"] { border-color: var(--ll-danger); }
.ll-input:disabled, .ll-select:disabled { opacity: .55; cursor: not-allowed; }
.ll-input-wrap { position: relative; }
.ll-input-wrap .ll-unit {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11.5px;
    color: var(--ll-muted);
    pointer-events: none;
}
.ll-input-wrap .ll-input { padding-right: 42px; }
.ll-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ll-row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.ll-hint {
    margin: 5px 0 0;
    font-size: 11.5px;
    line-height: 1.6;
    color: var(--ll-muted);
}
.ll-err {
    margin: 10px 0 0;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--ll-danger);
    background: var(--ll-danger-soft);
    border-radius: var(--ll-radius-sm);
    padding: 8px 10px;
}
.ll-err:empty { display: none; }
.ll-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 4px;
}
.ll-btn {
    appearance: none;
    border: 1px solid var(--ll-accent);
    background: var(--ll-accent);
    color: #f7fffd;
    font: 700 13.5px/1 var(--ll-sans);
    padding: 11px 18px;
    border-radius: var(--ll-radius-sm);
    cursor: pointer;
    transition: transform .12s, background .15s, box-shadow .15s;
}
.ll-btn:hover { background: var(--ll-accent-ink); border-color: var(--ll-accent-ink); }
.ll-btn:active { transform: translateY(1px); }
.ll-btn:disabled { opacity: .55; cursor: not-allowed; }
.ll-btn-ghost {
    appearance: none;
    border: 1px solid var(--ll-line-strong);
    background: transparent;
    color: var(--ll-ink-2);
    font: 600 13px/1 var(--ll-sans);
    padding: 10px 14px;
    border-radius: var(--ll-radius-sm);
    cursor: pointer;
}
.ll-btn-ghost:hover { border-color: var(--ll-accent); color: var(--ll-accent); }
.ll-btn-sm {
    appearance: none;
    border: 1px solid var(--ll-line);
    background: var(--ll-card-2);
    color: var(--ll-ink-2);
    font: 600 11.5px/1 var(--ll-sans);
    padding: 6px 9px;
    border-radius: 7px;
    cursor: pointer;
    white-space: nowrap;
}
.ll-btn-sm:hover { border-color: var(--ll-accent); color: var(--ll-accent); }
.ll-check {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    font-size: 12.5px;
    color: var(--ll-ink-2);
    line-height: 1.6;
    margin-bottom: 10px;
}
.ll-check input { margin-top: 3px; accent-color: var(--ll-accent); }

/* 折叠的进阶选项：保证首屏只放主流程 */
.ll-adv {
    margin-top: 14px;
    border-top: 1px dashed var(--ll-line-strong);
    padding-top: 10px;
}
.ll-adv > summary {
    cursor: pointer;
    list-style: none;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ll-accent-ink);
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}
.ll-adv > summary::-webkit-details-marker { display: none; }
.ll-adv > summary::before {
    content: "+";
    font-family: var(--ll-mono);
    font-size: 14px;
    line-height: 1;
    width: 14px;
    text-align: center;
}
.ll-adv[open] > summary::before { content: "−"; }
.ll-adv > summary span { font-weight: 400; color: var(--ll-muted); }

/* 动态行（批量表格输入） */
.ll-rows { display: grid; gap: 8px; margin-bottom: 10px; }
.ll-row-item {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) 84px 96px 30px;
    gap: 6px;
    align-items: center;
}
.ll-row-item .ll-input,
.ll-row-item .ll-select { height: 34px; font-size: 12.5px; }
.ll-row-item.is-3 { grid-template-columns: minmax(0, 1fr) 100px 30px; }
.ll-row-item.is-4 { grid-template-columns: minmax(0, 1fr) 82px 82px 30px; }
.ll-row-item.is-2 { grid-template-columns: minmax(0, 1fr) 100px; }
.ll-del {
    appearance: none;
    border: 1px solid var(--ll-line);
    background: transparent;
    color: var(--ll-muted);
    width: 30px;
    height: 34px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
}
.ll-del:hover { color: var(--ll-danger); border-color: var(--ll-danger); }

/* ---------- 结果区 ---------- */
.ll-result { min-height: 240px; }
.ll-big {
    font-family: var(--ll-mono);
    font-size: clamp(30px, 4.6vw, 42px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -.02em;
    color: var(--ll-accent);
    font-variant-numeric: tabular-nums;
    word-break: break-all;
}
.ll-big small {
    font-size: 15px;
    font-weight: 600;
    color: var(--ll-muted);
    letter-spacing: 0;
    margin-left: 4px;
}
.ll-big-label {
    margin: 6px 0 16px;
    font-size: 12.5px;
    color: var(--ll-muted);
}
.ll-kpis {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 14px;
}
.ll-kpi {
    background: var(--ll-card-2);
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    padding: 9px 11px;
}
.ll-kpi span {
    display: block;
    font-size: 11px;
    color: var(--ll-muted);
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ll-kpi b {
    display: block;
    font-family: var(--ll-mono);
    font-size: 15px;
    font-weight: 700;
    color: var(--ll-ink);
    font-variant-numeric: tabular-nums;
    word-break: break-word;
}
.ll-kpi b.is-good { color: var(--ll-ok); }
.ll-kpi b.is-warn { color: var(--ll-warm); }
.ll-kpi b.is-bad { color: var(--ll-danger); }

.ll-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    padding: 4px 7px;
    border-radius: 5px;
    background: var(--ll-bg-soft);
    color: var(--ll-ink-2);
    white-space: nowrap;
}
.ll-badge.is-ok { background: var(--ll-ok-soft); color: var(--ll-ok); }
.ll-badge.is-warn { background: var(--ll-warm-soft); color: var(--ll-warm); }
.ll-badge.is-bad { background: var(--ll-danger-soft); color: var(--ll-danger); }
.ll-badge.is-accent { background: var(--ll-accent-soft); color: var(--ll-accent-ink); }

/* ---------- 表格 ---------- */
.ll-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    margin: 12px 0;
    -webkit-overflow-scrolling: touch;
}
.ll-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12.5px;
    min-width: 100%;
}
.ll-table th,
.ll-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--ll-line);
    text-align: left;
    white-space: nowrap;
}
.ll-table th {
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ll-muted);
    background: var(--ll-bg-soft);
    position: sticky;
    top: 0;
}
.ll-table td {
    font-family: var(--ll-mono);
    font-variant-numeric: tabular-nums;
    color: var(--ll-ink-2);
}
.ll-table td:first-child {
    font-family: var(--ll-sans);
    color: var(--ll-ink);
    font-weight: 600;
    white-space: normal;
}
.ll-table td.num, .ll-table th.num { text-align: right; }
.ll-table tr:last-child td { border-bottom: 0; }
.ll-table tr.is-total td {
    background: var(--ll-accent-soft);
    color: var(--ll-accent-ink);
    font-weight: 700;
}
.ll-table td.is-bad { color: var(--ll-danger); }
.ll-table td.is-warn { color: var(--ll-warm); }
.ll-table td.is-good { color: var(--ll-ok); }
.ll-table caption {
    caption-side: top;
    text-align: left;
    font-size: 11.5px;
    color: var(--ll-muted);
    padding: 8px 10px 0;
}

/* ---------- 简易图表 ---------- */
.ll-chart {
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    background: var(--ll-card-2);
    padding: 10px;
    margin: 12px 0;
}
.ll-chart svg { display: block; width: 100%; height: auto; }
.ll-chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 11.5px;
    color: var(--ll-muted);
    margin-top: 6px;
}
.ll-chart-legend i {
    display: inline-block;
    width: 10px;
    height: 3px;
    border-radius: 2px;
    margin-right: 5px;
    vertical-align: middle;
}

.ll-bar {
    display: grid;
    grid-template-columns: 92px 1fr 58px;
    gap: 8px;
    align-items: center;
    font-size: 12px;
    margin-bottom: 7px;
}
.ll-bar > span:first-child { color: var(--ll-ink-2); }
.ll-bar-track {
    height: 8px;
    border-radius: 999px;
    background: var(--ll-bg-soft);
    overflow: hidden;
}
.ll-bar-fill { height: 100%; border-radius: 999px; background: var(--ll-accent); }
.ll-bar-fill.is-warn { background: var(--ll-warm); }
.ll-bar-fill.is-bad { background: var(--ll-danger); }
.ll-bar > b {
    font-family: var(--ll-mono);
    font-size: 12px;
    text-align: right;
    color: var(--ll-ink);
    font-variant-numeric: tabular-nums;
}

/* ---------- 正文区 ---------- */
.ll-sec {
    margin: 0 0 26px;
    padding-top: 22px;
    border-top: 1px solid var(--ll-line);
}
.ll-sec h2 {
    margin: 0 0 12px;
    font-family: var(--ll-serif);
    font-size: clamp(20px, 2.4vw, 26px);
    font-weight: 700;
    line-height: 1.3;
    color: var(--ll-ink);
}
.ll-sec h3 {
    margin: 20px 0 8px;
    font-family: var(--ll-sans);
    font-size: 15.5px;
    font-weight: 700;
    color: var(--ll-ink);
}
.ll-sec h3::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 13px;
    background: var(--ll-accent);
    border-radius: 2px;
    margin-right: 8px;
    vertical-align: -1px;
}
.ll-prose {
    font-size: 15px;
    line-height: 1.9;
    color: var(--ll-ink-2);
    max-width: 74ch;
}
.ll-prose p { margin: 0 0 12px; }
.ll-prose b, .ll-prose strong { color: var(--ll-ink); }
.ll-prose ul, .ll-prose ol { margin: 0 0 14px; padding-left: 20px; }
.ll-prose li { margin-bottom: 6px; }
.ll-prose code {
    font-family: var(--ll-mono);
    font-size: .9em;
    background: var(--ll-bg-soft);
    border-radius: 5px;
    padding: 1px 5px;
    color: var(--ll-accent-ink);
}
.ll-formula {
    font-family: var(--ll-mono);
    font-size: 13px;
    line-height: 2;
    color: var(--ll-ink);
    background: var(--ll-card-2);
    border: 1px solid var(--ll-line);
    border-left: 3px solid var(--ll-accent);
    border-radius: 0 var(--ll-radius-sm) var(--ll-radius-sm) 0;
    padding: 12px 14px;
    margin: 12px 0;
    overflow-x: auto;
}
.ll-formula b { color: var(--ll-accent-ink); }
.ll-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
.ll-card-link {
    display: block;
    padding: 12px 14px;
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    background: var(--ll-card);
    text-decoration: none;
    color: inherit;
    transition: border-color .15s, transform .15s;
}
.ll-card-link:hover { border-color: var(--ll-accent); transform: translateY(-1px); }
.ll-card-link b {
    display: block;
    font-size: 13.5px;
    color: var(--ll-ink);
    margin-bottom: 2px;
}
.ll-card-link span { font-size: 12px; color: var(--ll-muted); }
.ll-rel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

/* ---------- FAQ ---------- */
.ll-faq details {
    border: 1px solid var(--ll-line);
    border-radius: var(--ll-radius-sm);
    background: var(--ll-card);
    padding: 0 14px;
    margin-bottom: 8px;
}
.ll-faq summary {
    cursor: pointer;
    padding: 12px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--ll-ink);
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}
.ll-faq summary::-webkit-details-marker { display: none; }
.ll-faq summary::after {
    content: "+";
    font-family: var(--ll-mono);
    color: var(--ll-accent);
    font-size: 16px;
    line-height: 1;
}
.ll-faq details[open] summary::after { content: "−"; }
.ll-faq details p {
    margin: 0 0 13px;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--ll-ink-2);
}

/* ---------- AI 区 ---------- */
.ll-ai {
    margin: 0 0 26px;
    padding: 18px;
    border: 1px solid var(--ll-accent);
    border-radius: var(--ll-radius);
    background:
        radial-gradient(700px 220px at 100% 0%, var(--ll-accent-soft) 0%, transparent 70%),
        var(--ll-card);
}
.ll-ai-head {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 6px;
}
.ll-ai-head h2 {
    margin: 0;
    font-family: var(--ll-sans);
    font-size: 15px;
    font-weight: 700;
}
.ll-ai-head .ll-badge { margin-left: auto; }
.ll-ai-tip { font-size: 12px; line-height: 1.7; color: var(--ll-muted); margin: 0 0 12px; }
.ll-ai-btn {
    appearance: none;
    border: 1px solid var(--ll-accent);
    background: var(--ll-accent);
    color: #f7fffd;
    font: 700 13px/1 var(--ll-sans);
    padding: 10px 16px;
    border-radius: var(--ll-radius-sm);
    cursor: pointer;
}
.ll-ai-btn:hover { background: var(--ll-accent-ink); }
.ll-ai-btn:disabled { opacity: .6; cursor: progress; }
.ll-ai-status { margin: 8px 0 0; font-size: 12px; min-height: 16px; color: var(--ll-muted); }
.ll-ai-status.is-err { color: var(--ll-danger); }
.ll-ai-status.is-ok { color: var(--ll-ok); }
.ll-ai-out {
    margin-top: 12px;
    border-top: 1px solid var(--ll-line);
    padding-top: 12px;
    font-size: 13.5px;
    line-height: 1.9;
    color: var(--ll-ink-2);
}
.ll-ai-out h3 {
    margin: 12px 0 4px;
    font-size: 13.5px;
    color: var(--ll-accent-ink);
}
.ll-ai-out p { margin: 0 0 8px; }
.ll-ai-out .ll-ai-disclaim {
    margin-top: 10px;
    font-size: 11.5px;
    color: var(--ll-muted);
    border-left: 2px solid var(--ll-line-strong);
    padding-left: 8px;
}

/* ---------- toast ---------- */
.ll-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translate(-50%, 12px);
    background: var(--ll-ink);
    color: var(--ll-card);
    font-size: 13px;
    padding: 9px 16px;
    border-radius: 999px;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, .5);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
    z-index: 999;
}
.ll-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
    .ll-workspace { grid-template-columns: 1fr; }
    .ll-form { position: static; }
}
@media (max-width: 640px) {
    .ll-shell { padding: 16px 14px 56px; }
    .ll-hero { grid-template-columns: 1fr; gap: 12px; }
    .ll-hero-side { align-items: flex-start; flex-direction: row; flex-wrap: wrap; }
    .ll-cols { grid-template-columns: 1fr; }
    .ll-row3 { grid-template-columns: 1fr 1fr; }
    .ll-row-item { grid-template-columns: 1fr 70px 80px 28px; }
    .ll-kpis { grid-template-columns: 1fr 1fr; }
    .ll-table th, .ll-table td { padding: 7px 8px; }
    .ll-big { font-size: 30px; }
}

/* ---------- 打印 ---------- */
@media print {
    .ll-page { background: #fff; color: #000; }
    .ll-noprint, .nav-header, .site-footer, .cm-wrap, .ll-toast,
    .ll-hero-side, .ll-form, .ll-ai, .ll-rel, .ll-jump { display: none !important; }
    .ll-shell { max-width: none; padding: 0; }
    .ll-hero { border-bottom: 1px solid #999; padding-bottom: 10px; }
    .ll-workspace { display: block; }
    .ll-panel {
        border: 1px solid #999;
        box-shadow: none;
        page-break-inside: avoid;
        margin-bottom: 12px;
    }
    .ll-table-wrap { overflow: visible; border-color: #999; }
    .ll-table th { background: #f2f2f2; color: #000; }
    .ll-table th, .ll-table td { border-color: #bbb; }
    .ll-sec { page-break-inside: avoid; border-top-color: #ccc; }
    .ll-faq details { page-break-inside: avoid; }
    .ll-faq details p { display: block !important; }
    .ll-big { color: #000; }
    .ll-kpi, .ll-chart, .ll-formula { border-color: #999; background: #fff; }
}