/* ═══════════════════════════════════════════════════════════════════
   EZCAI Calculators — 工具页样式层 (calc-tool.css)
   依赖：calc.css 的 :root 令牌 + .calc-shell / .calc-topbar / .calc-footer
   本文件只新增 calc-tool* / calc-field* / calc-out* / calc-math* 子命名空间
   不覆写 calc.css 已有规则，不污染 algo-* 命名空间
   零构建 · 零 CDN · 零外部依赖
   ═══════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────
   1. 面包屑
   ───────────────────────────────────────────────────────────────── */
.calc-crumb {
  padding: 22px 0 0;
  font: 500 12.5px/1.5 var(--calc-sans);
  letter-spacing: 0.02em;
}
.calc-crumb__list {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px; margin: 0; padding: 0; list-style: none;
}
.calc-crumb__list li { display: flex; align-items: center; gap: 8px; }
.calc-crumb__list li::after {
  content: "/"; color: var(--calc-dim); font-weight: 400;
}
.calc-crumb__list li:last-child::after { content: none; }
.calc-crumb a { color: var(--calc-muted); text-decoration: none; transition: color .16s var(--calc-ease-ui); }
.calc-crumb a:hover { color: var(--calc-amber); }
.calc-crumb [aria-current="page"] { color: var(--calc-fg); }

/* ─────────────────────────────────────────────────────────────────
   2. 工具页头部
   ───────────────────────────────────────────────────────────────── */
.calc-toolhead { position: relative; padding: 30px 0 34px; overflow: hidden; }
.calc-toolhead::after {
  content: ""; position: absolute; inset: auto 0 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--calc-border-hi) 22%,
              var(--calc-border-teal) 62%, transparent);
}
.calc-toolhead__aura {
  position: absolute; z-index: 0; pointer-events: none;
  width: 520px; height: 520px; border-radius: 50%;
  filter: blur(94px); opacity: .30;
}
.calc-toolhead__aura--a { top: -300px; left: -110px; background: radial-gradient(circle, #FBBF24, transparent 66%); }
.calc-toolhead__aura--b { top: -250px; right: -140px; background: radial-gradient(circle, #2DD4BF, transparent 68%); }
.calc-toolhead__inner { position: relative; z-index: 1; }

.calc-toolhead__meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.calc-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 11px; border-radius: var(--calc-radius-pill);
  border: 1px solid var(--calc-border);
  background: rgba(255, 255, 255, .028);
  font: 600 11.5px/1 var(--calc-mono);
  letter-spacing: .07em; text-transform: uppercase;
  color: var(--calc-muted);
}
.calc-chip--id { border-color: var(--calc-border-hi); color: var(--calc-amber); }
.calc-chip--live { border-color: var(--calc-border-teal); color: var(--calc-teal); }
.calc-chip--live::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--calc-teal); box-shadow: 0 0 8px var(--calc-teal);
}
.calc-chip--free { border-color: rgba(167, 139, 250, .30); color: var(--calc-violet); }

.calc-toolhead__title {
  margin: 0 0 14px;
  font: 700 clamp(30px, 4.4vw, 47px)/1.1 var(--calc-sans);
  letter-spacing: -.024em; color: var(--calc-fg);
}
.calc-toolhead__title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--calc-amber), var(--calc-teal) 74%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.calc-toolhead__lede {
  max-width: 74ch; margin: 0 0 20px;
  font: 400 clamp(14.5px, 1.42vw, 16.5px)/1.72 var(--calc-sans);
  color: var(--calc-muted);
}
.calc-toolhead__q {
  display: flex; gap: 12px; align-items: flex-start;
  max-width: 76ch; padding: 14px 17px;
  border-left: 2px solid var(--calc-amber);
  border-radius: 0 var(--calc-radius) var(--calc-radius) 0;
  background: linear-gradient(90deg, rgba(251, 191, 36, .07), transparent 82%);
}
.calc-toolhead__q b {
  flex: none; font: 700 11.5px/1.5 var(--calc-mono);
  letter-spacing: .08em; color: var(--calc-amber); padding-top: 2px;
}
.calc-toolhead__q span {
  font: 400 14.5px/1.66 var(--calc-sans); color: var(--calc-fg);
}

/* ─────────────────────────────────────────────────────────────────
   3. 骨架
   · .calc-tool 用于「侧栏 + 主区」的旧式双栏工具页（CALC-01/02/03）
   · CALC-04 起改用 .calc-tool--stack：单列纵向流，让 .calc-console
     独占整个内容宽度，其内部再自行切分「输入台 | 三栏读数」。
     双栏骨架会把 console 挤进 360px 那一栏，导致三栏读数压成一条。
   ───────────────────────────────────────────────────────────────── */
.calc-tool {
  display: grid; gap: 22px;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  align-items: start;
  padding: 30px 0 8px;
}
/* 单列纵向流：子元素依次占满宽，不参与列分配 */
.calc-tool--stack {
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}
.calc-tool__side { position: sticky; top: 78px; display: grid; gap: 16px; }
.calc-tool__main { display: grid; gap: 20px; min-width: 0; }

@media (max-width: 1080px) {
  .calc-tool { grid-template-columns: minmax(0, 1fr); }
  .calc-tool__side { position: static; top: auto; }
}

/* ─────────────────────────────────────────────────────────────────
   4. 面板通用容器
   ───────────────────────────────────────────────────────────────── */
.calc-panel {
  position: relative;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-lg);
  background: var(--calc-surface);
  box-shadow: var(--calc-shadow);
  overflow: hidden;
}
.calc-panel__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; padding: 15px 18px 13px;
  border-bottom: 1px solid var(--calc-border);
  background: rgba(255, 255, 255, .018);
}
.calc-panel__t {
  margin: 0; font: 700 13.5px/1.35 var(--calc-sans);
  letter-spacing: -.008em; color: var(--calc-fg);
}
.calc-panel__hint { font: 500 11.5px/1.4 var(--calc-mono); color: var(--calc-dim); letter-spacing: .04em; }
.calc-panel__body { padding: 17px 18px 19px; }
.calc-panel--accent { border-color: var(--calc-border-hi); box-shadow: var(--calc-glow-amber); }

/* ─────────────────────────────────────────────────────────────────
   5. 输入字段
   ───────────────────────────────────────────────────────────────── */
.calc-fieldset { border: 0; margin: 0; padding: 0; }
.calc-fieldset + .calc-fieldset { margin-top: 18px; }
.calc-fieldset__legend {
  padding: 0 0 10px; font: 700 11px/1 var(--calc-mono);
  letter-spacing: .12em; text-transform: uppercase; color: var(--calc-dim);
}

.calc-field { display: grid; gap: 6px; }
.calc-field + .calc-field { margin-top: 13px; }
.calc-field__label {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  font: 600 12.5px/1.4 var(--calc-sans); color: var(--calc-fg);
}
.calc-field__label small {
  font: 500 11px/1.4 var(--calc-mono); color: var(--calc-dim); letter-spacing: .04em;
}
.calc-field__row { display: flex; align-items: stretch; gap: 8px; }

.calc-input {
  flex: 1 1 auto; min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  background: rgba(7, 7, 12, .62);
  color: var(--calc-fg);
  font: 600 15px/1.3 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  transition: border-color .15s var(--calc-ease-ui), box-shadow .15s var(--calc-ease-ui);
  -moz-appearance: textfield;
}
.calc-input::-webkit-outer-spin-button,
.calc-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.calc-input:hover { border-color: rgba(255, 255, 255, .16); }
.calc-input:focus {
  outline: none; border-color: var(--calc-amber);
  box-shadow: 0 0 0 3px rgba(251, 191, 36, .16);
}
.calc-input[aria-invalid="true"] {
  border-color: #F87171; box-shadow: 0 0 0 3px rgba(248, 113, 113, .15);
}
.calc-input__unit {
  flex: none; display: inline-flex; align-items: center; padding: 0 11px;
  border: 1px solid var(--calc-border); border-radius: var(--calc-radius-sm);
  background: rgba(255, 255, 255, .028);
  font: 600 11.5px/1 var(--calc-mono); letter-spacing: .05em; color: var(--calc-dim);
}
.calc-field__err {
  min-height: 15px; font: 500 11.5px/1.3 var(--calc-sans); color: #FCA5A5;
}
.calc-field__err:empty { min-height: 0; }

/* ─────────────────────────────────────────────────────────────────
   6. 预设按钮组 & 操作按钮
   ───────────────────────────────────────────────────────────────── */
.calc-presets { display: flex; flex-wrap: wrap; gap: 7px; }
.calc-preset {
  appearance: none; cursor: pointer;
  padding: 7px 11px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-pill);
  background: rgba(255, 255, 255, .026);
  color: var(--calc-muted);
  font: 600 11.5px/1 var(--calc-mono); letter-spacing: .04em;
  transition: color .15s var(--calc-ease-ui), border-color .15s var(--calc-ease-ui),
              background-color .15s var(--calc-ease-ui), transform .12s var(--calc-ease-ui);
}
.calc-preset:hover { color: var(--calc-fg); border-color: rgba(255, 255, 255, .18); }
.calc-preset:active { transform: scale(.97); }
.calc-preset[aria-pressed="true"] {
  color: var(--calc-bg); border-color: var(--calc-amber);
  background: var(--calc-amber); font-weight: 700;
}
.calc-preset:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 2px; }

.calc-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.calc-act {
  appearance: none; cursor: pointer; flex: 1 1 auto;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px 15px;
  border: 1px solid var(--calc-border-teal);
  border-radius: var(--calc-radius-sm);
  background: rgba(45, 212, 191, .08);
  color: var(--calc-teal);
  font: 700 12.5px/1 var(--calc-sans); letter-spacing: .01em;
  transition: background-color .15s var(--calc-ease-ui), color .15s var(--calc-ease-ui),
              transform .12s var(--calc-ease-ui);
}
.calc-act:hover { background: rgba(45, 212, 191, .16); color: #7FF3E4; }
.calc-act:active { transform: scale(.98); }
.calc-act:focus-visible { outline: 2px solid var(--calc-amber); outline-offset: 2px; }
.calc-act--ghost { border-color: var(--calc-border); background: transparent; color: var(--calc-muted); }
.calc-act--ghost:hover { background: rgba(255, 255, 255, .04); color: var(--calc-fg); }
.calc-act__ok { color: var(--calc-mint); }

/* ─────────────────────────────────────────────────────────────────
   7. 摘要数字条
   ───────────────────────────────────────────────────────────────── */
.calc-summary {
  display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  background: var(--calc-border);
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-lg);
  overflow: hidden;
}
.calc-sum {
  padding: 15px 17px 16px;
  background: var(--calc-surface-sol);
  display: grid; gap: 5px; align-content: start;
}
.calc-sum__k {
  font: 600 10.5px/1.3 var(--calc-mono); letter-spacing: .11em;
  text-transform: uppercase; color: var(--calc-dim);
}
.calc-sum__v {
  font: 700 clamp(21px, 2.5vw, 27px)/1.08 var(--calc-mono);
  font-variant-numeric: tabular-nums; letter-spacing: -.02em;
  color: var(--calc-fg);
}
.calc-sum__v--amber { color: var(--calc-amber); }
.calc-sum__v--teal  { color: var(--calc-teal); }
.calc-sum__v--mint  { color: var(--calc-mint); }
.calc-sum__v--warn  { color: #FCA5A5; }
.calc-sum__n { font: 500 11px/1.45 var(--calc-sans); color: var(--calc-dim); }

/* ─────────────────────────────────────────────────────────────────
   8. 结果表
   ───────────────────────────────────────────────────────────────── */
.calc-tablewrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.calc-table {
  width: 100%; min-width: 620px; border-collapse: collapse;
  font: 500 13px/1.5 var(--calc-mono); font-variant-numeric: tabular-nums;
}
.calc-table caption {
  padding: 0 0 11px; text-align: left;
  font: 500 11.5px/1.5 var(--calc-sans); color: var(--calc-dim);
}
.calc-table th, .calc-table td {
  padding: 9px 12px; text-align: right;
  border-bottom: 1px solid var(--calc-border);
  white-space: nowrap;
}
.calc-table th:first-child, .calc-table td:first-child { text-align: left; }
.calc-table thead th {
  font: 700 10.5px/1.4 var(--calc-mono); letter-spacing: .09em;
  text-transform: uppercase; color: var(--calc-dim);
  border-bottom-color: rgba(255, 255, 255, .14);
}
.calc-table tbody tr { transition: background-color .14s var(--calc-ease-ui); }
.calc-table tbody tr:hover { background: rgba(255, 255, 255, .028); }
.calc-table tbody th { font-weight: 700; color: var(--calc-fg); }
.calc-table td.is-key { color: var(--calc-amber); font-weight: 700; }
.calc-table td.is-alt { color: var(--calc-teal); }
.calc-table tfoot td, .calc-table tfoot th {
  border-bottom: 0; border-top: 1px solid rgba(255, 255, 255, .14);
  font-weight: 700; color: var(--calc-muted);
}

/* ─────────────────────────────────────────────────────────────────
   9. 数理三行制：MathML → 中文口语 → 数值代入
   ───────────────────────────────────────────────────────────────── */
.calc-math {
  display: grid; gap: 9px;
  padding: 15px 17px;
  border: 1px solid var(--calc-border);
  border-left: 2px solid var(--calc-teal);
  border-radius: 0 var(--calc-radius) var(--calc-radius) 0;
  background: rgba(45, 212, 191, .045);
}
.calc-math + .calc-math { margin-top: 13px; }
.calc-math__f {
  overflow-x: auto; padding: 2px 0;
  font-size: clamp(15px, 1.6vw, 17.5px); color: var(--calc-fg);
}
.calc-math__f math { font-family: var(--calc-serif); }
.calc-math__say {
  font: 500 13.5px/1.68 var(--calc-sans); color: var(--calc-fg);
}
.calc-math__say::before {
  content: "一句话："; font-weight: 700; color: var(--calc-teal);
}
.calc-math__sub {
  font: 500 12.5px/1.62 var(--calc-mono); font-variant-numeric: tabular-nums;
  color: var(--calc-muted); word-break: break-word;
}
.calc-math__sub b { color: var(--calc-amber); font-weight: 700; }

/* MathML 纯 CSS 兜底：不支持 MathML 的引擎至少保持行内可读 */
math { font-family: var(--calc-serif); }
mfrac { display: inline-block; vertical-align: middle; }
@supports not (display: math) {
  math { font-family: var(--calc-mono); font-size: .95em; }
}

/* ─────────────────────────────────────────────────────────────────
   10. 「这个数怎么来的」折叠
   ───────────────────────────────────────────────────────────────── */
.calc-why {
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: rgba(255, 255, 255, .018);
  overflow: hidden;
}
.calc-why + .calc-why { margin-top: 10px; }
.calc-why > summary {
  cursor: pointer; list-style: none;
  display: flex; align-items: center; gap: 9px;
  padding: 12px 15px;
  font: 600 12.5px/1.4 var(--calc-sans); color: var(--calc-teal);
  transition: background-color .15s var(--calc-ease-ui), color .15s var(--calc-ease-ui);
}
.calc-why > summary::-webkit-details-marker { display: none; }
.calc-why > summary::before {
  content: "+"; flex: none;
  width: 17px; height: 17px; border-radius: 4px;
  display: grid; place-items: center;
  border: 1px solid var(--calc-border-teal);
  font: 700 12px/1 var(--calc-mono); color: var(--calc-teal);
  transition: transform .18s var(--calc-ease-ui);
}
.calc-why[open] > summary::before { content: "\2212"; transform: rotate(180deg); }
.calc-why > summary:hover { background: rgba(45, 212, 191, .06); color: #7FF3E4; }
.calc-why > summary:focus-visible { outline: 2px solid var(--calc-amber); outline-offset: -2px; }
.calc-why__body {
  padding: 3px 15px 16px;
  border-top: 1px solid var(--calc-border);
  animation: calcWhyIn .28s var(--calc-ease-ui) both;
}
@keyframes calcWhyIn {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: none; }
}

/* ─────────────────────────────────────────────────────────────────
   11. 五格式对照卡
   ───────────────────────────────────────────────────────────────── */
.calc-fmt {
  display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
}
.calc-fmt__cell {
  padding: 12px 13px 13px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: rgba(7, 7, 12, .48);
  display: grid; gap: 5px;
  transition: border-color .15s var(--calc-ease-ui), transform .16s var(--calc-ease-ui);
}
.calc-fmt__cell:hover { border-color: var(--calc-border-hi); transform: translateY(-2px); }
.calc-fmt__k {
  font: 600 10.5px/1.3 var(--calc-mono); letter-spacing: .1em;
  text-transform: uppercase; color: var(--calc-dim);
}
.calc-fmt__v {
  font: 700 18px/1.15 var(--calc-mono); font-variant-numeric: tabular-nums;
  color: var(--calc-fg); letter-spacing: -.014em;
}
.calc-fmt__n { font: 500 10.5px/1.42 var(--calc-sans); color: var(--calc-dim); }

/* ─────────────────────────────────────────────────────────────────
   12. 注记 / 假设声明 / 警示
   ───────────────────────────────────────────────────────────────── */
.calc-note {
  padding: 13px 16px;
  border: 1px solid var(--calc-border);
  border-left: 2px solid var(--calc-dim);
  border-radius: 0 var(--calc-radius) var(--calc-radius) 0;
  background: rgba(255, 255, 255, .02);
  font: 400 13px/1.68 var(--calc-sans); color: var(--calc-muted);
}
.calc-note + .calc-note { margin-top: 10px; }
.calc-note b { color: var(--calc-fg); font-weight: 700; }
.calc-note code {
  padding: 1px 5px; border-radius: 4px;
  background: rgba(255, 255, 255, .06);
  font: 600 12px/1 var(--calc-mono); color: var(--calc-teal);
}
.calc-note--warn {
  border-left-color: #FBBF24; background: rgba(251, 191, 36, .055);
}
.calc-note--warn b { color: var(--calc-amber); }
.calc-note--danger {
  border-left-color: #F87171; background: rgba(248, 113, 113, .055);
}
.calc-note--danger b { color: #FCA5A5; }

.calc-assume { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.calc-assume li {
  display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 11px;
  align-items: baseline;
  font: 400 13px/1.66 var(--calc-sans); color: var(--calc-muted);
}
.calc-assume li b {
  font: 700 11px/1.6 var(--calc-mono); letter-spacing: .06em; color: var(--calc-amber);
}

/* ─────────────────────────────────────────────────────────────────
   13. 示例数据集切换
   ───────────────────────────────────────────────────────────────── */
.calc-ex { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(228px, 1fr)); }
.calc-ex__item {
  cursor: pointer; appearance: none; text-align: left;
  padding: 13px 15px 14px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: rgba(255, 255, 255, .02);
  display: grid; gap: 6px;
  transition: border-color .16s var(--calc-ease-ui), background-color .16s var(--calc-ease-ui),
              transform .16s var(--calc-ease-ui);
}
.calc-ex__item:hover {
  border-color: var(--calc-border-hi); background: rgba(251, 191, 36, .05);
  transform: translateY(-2px);
}
.calc-ex__item:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 2px; }
.calc-ex__id {
  font: 700 10.5px/1 var(--calc-mono); letter-spacing: .1em; color: var(--calc-amber);
}
.calc-ex__t { font: 700 13px/1.4 var(--calc-sans); color: var(--calc-fg); }
.calc-ex__d { font: 400 11.5px/1.55 var(--calc-sans); color: var(--calc-dim); }
.calc-ex__odds {
  font: 600 12px/1 var(--calc-mono); font-variant-numeric: tabular-nums; color: var(--calc-teal);
}

/* ─────────────────────────────────────────────────────────────────
   14. 跨栏目桥 & 上下篇
   ───────────────────────────────────────────────────────────────── */
.calc-linkrow { display: grid; gap: 11px; grid-template-columns: repeat(auto-fit, minmax(246px, 1fr)); }
.calc-link {
  display: grid; gap: 6px; text-decoration: none;
  padding: 15px 16px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: rgba(255, 255, 255, .02);
  transition: border-color .16s var(--calc-ease-ui), background-color .16s var(--calc-ease-ui),
              transform .16s var(--calc-ease-ui);
}
.calc-link:hover {
  border-color: rgba(34, 211, 238, .32); background: rgba(34, 211, 238, .05);
  transform: translateY(-2px);
}
.calc-link__tag {
  font: 700 10.5px/1 var(--calc-mono); letter-spacing: .1em; color: var(--calc-cyan);
}
.calc-link__t { margin: 0; font: 700 13.5px/1.4 var(--calc-sans); color: var(--calc-fg); }
.calc-link__d { margin: 0; font: 400 11.5px/1.58 var(--calc-sans); color: var(--calc-dim); }

/* ─────────────────────────────────────────────────────────────────
   15. 区块间距 & 小节标题
   ───────────────────────────────────────────────────────────────── */
.calc-block { padding: 34px 0 6px; }
.calc-block__h {
  display: flex; align-items: baseline; gap: 11px; margin: 0 0 8px;
  font: 700 clamp(19px, 2.1vw, 23px)/1.26 var(--calc-sans);
  letter-spacing: -.016em; color: var(--calc-fg);
}
.calc-block__h span {
  font: 700 11px/1 var(--calc-mono); letter-spacing: .1em; color: var(--calc-amber);
}
.calc-block__d {
  max-width: 76ch; margin: 0 0 17px;
  font: 400 13.5px/1.72 var(--calc-sans); color: var(--calc-muted);
}

/* ─────────────────────────────────────────────────────────────────
   16. 入场动效（cinematic：仅工具头与首屏面板）
   ───────────────────────────────────────────────────────────────── */
.calc-rise { animation: calcRise .62s var(--calc-ease-expo) both; }
.calc-rise--d1 { animation-delay: .06s; }
.calc-rise--d2 { animation-delay: .12s; }
.calc-rise--d3 { animation-delay: .18s; }
@keyframes calcRise {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

/* 数值更新脉冲（product-ui：micro 0.18s） */
.calc-pulse { animation: calcPulse .18s var(--calc-ease-ui); }
@keyframes calcPulse {
  from { background-color: rgba(251, 191, 36, .18); }
  to   { background-color: transparent; }
}

/* ─────────────────────────────────────────────────────────────────
   17. 响应式 & 无障碍
   ───────────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .calc-toolhead { padding: 22px 0 26px; }
  .calc-tool { padding: 22px 0 6px; gap: 16px; }
  .calc-panel__body { padding: 15px 15px 17px; }
  .calc-actions .calc-act { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .calc-rise, .calc-pulse, .calc-why__body { animation: none !important; }
  .calc-ex__item:hover, .calc-link:hover, .calc-fmt__cell:hover { transform: none; }
  .calc-preset:active, .calc-act:active { transform: none; }
  * { scroll-behavior: auto !important; }
}

@media print {
  .calc-topbar, .calc-footer, .calc-presets, .calc-actions, .calc-ex { display: none; }
  .calc-tool { grid-template-columns: 1fr; }
  .calc-why[open] .calc-why__body { display: block; }
}

.calc-sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}


/* ============================================================
   CALC-03 追加 §A  判定条 calc-verdict-*
   三态：value(有价值) / thin(边际过薄) / novalue(无价值)
   视觉纪律：左边框 4px 表状态 + 7% 同色底，不用渐变
   ============================================================ */

.calc-verdict {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  margin: 22px 0 26px;
  padding: 20px 22px 20px 18px;
  border: 1px solid var(--calc-border);
  border-left: 4px solid var(--calc-dim);
  border-radius: var(--calc-radius);
  background: var(--calc-surface);
  transition: border-left-color var(--calc-dur-ui) var(--calc-ease-std),
              background-color var(--calc-dur-ui) var(--calc-ease-std);
}

.calc-verdict__icon {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: var(--calc-radius-pill);
  border: 1px solid var(--calc-border);
  font: 600 15px/1 var(--calc-mono);
  color: var(--calc-dim);
}

.calc-verdict__body { min-width: 0; }

.calc-verdict__label {
  margin: 0 0 4px;
  font: 700 16.5px/1.25 var(--calc-sans);
  letter-spacing: -.01em;
  color: var(--calc-fg);
}

.calc-verdict__hint {
  margin: 0;
  font: 400 12.5px/1.6 var(--calc-sans);
  color: var(--calc-muted);
}

.calc-verdict__edge {
  text-align: right;
  font: 700 26px/1.05 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.03em;
  color: var(--calc-fg);
  white-space: nowrap;
}

.calc-verdict__unit {
  display: block;
  margin-top: 3px;
  font: 500 10.5px/1 var(--calc-sans);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--calc-dim);
}

/* --- 三态 --- */

.calc-verdict--value {
  border-left-color: var(--calc-mint);
  background: rgba(52, 211, 153, 0.07);
}
.calc-verdict--value .calc-verdict__icon {
  color: var(--calc-mint);
  border-color: rgba(52, 211, 153, 0.34);
}
.calc-verdict--value .calc-verdict__edge { color: var(--calc-mint); }

.calc-verdict--thin {
  border-left-color: var(--calc-dim);
  background: rgba(255, 255, 255, 0.035);
}
.calc-verdict--thin .calc-verdict__icon { color: var(--calc-dim); }
.calc-verdict--thin .calc-verdict__edge { color: var(--calc-muted); }

.calc-verdict--novalue {
  border-left-color: #F87171;
  background: rgba(248, 113, 113, 0.07);
}
.calc-verdict--novalue .calc-verdict__icon {
  color: #FCA5A5;
  border-color: rgba(248, 113, 113, 0.34);
}
.calc-verdict--novalue .calc-verdict__edge { color: #FCA5A5; }

@media (max-width: 620px) {
  .calc-verdict {
    grid-template-columns: auto 1fr;
    gap: 12px 14px;
  }
  .calc-verdict__edge {
    grid-column: 1 / -1;
    text-align: left;
    font-size: 22px;
  }
}


/* ============================================================
   CALC-03 追加 §B  及格线刻度尺 calc-gauge-*
   --calc-gauge-be  : 及格线位置 (0–100)
   --calc-gauge-p   : 你的估计位置 (0–100)
   --calc-gauge-lo  : 填充条起点 (0–100)
   --calc-gauge-w   : 填充条宽度 (0–100)
   ============================================================ */

.calc-gauge {
  --calc-gauge-be: 50;
  --calc-gauge-p: 50;
  --calc-gauge-lo: 50;
  --calc-gauge-w: 0;
  margin: 8px 0 4px;
  padding: 26px 4px 8px;
}

.calc-gauge__track {
  position: relative;
  height: 8px;
  border-radius: var(--calc-radius-pill);
  background: linear-gradient(90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.09) 100%);
  border: 1px solid var(--calc-border);
}

.calc-gauge__fill {
  position: absolute;
  top: -1px; bottom: -1px;
  left: calc(var(--calc-gauge-lo) * 1%);
  width: calc(var(--calc-gauge-w) * 1%);
  border-radius: var(--calc-radius-pill);
  background: rgba(45, 212, 191, 0.30);
  transition: left var(--calc-dur-ui) var(--calc-ease-ui),
              width var(--calc-dur-ui) var(--calc-ease-ui),
              background-color var(--calc-dur-ui) var(--calc-ease-std);
}

.calc-gauge__fill--neg { background: rgba(248, 113, 113, 0.28); }
.calc-gauge__fill--thin { background: rgba(255, 255, 255, 0.12); }

.calc-gauge__mark {
  position: absolute;
  top: 50%;
  width: 2px; height: 22px;
  margin-left: -1px;
  transform: translateY(-50%);
  background: var(--calc-dim);
  transition: left var(--calc-dur-ui) var(--calc-ease-ui);
}

.calc-gauge__mark--be { left: calc(var(--calc-gauge-be) * 1%); }

.calc-gauge__dot {
  position: absolute;
  top: 50%;
  left: calc(var(--calc-gauge-p) * 1%);
  width: 14px; height: 14px;
  margin-left: -7px;
  transform: translateY(-50%);
  border-radius: var(--calc-radius-pill);
  background: var(--calc-surface-sol);
  border: 3px solid var(--calc-amber);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.12);
  transition: left var(--calc-dur-ui) var(--calc-ease-ui);
}

.calc-gauge__tag {
  position: absolute;
  bottom: 100%;
  margin-bottom: 12px;
  transform: translateX(-50%);
  white-space: nowrap;
  font: 600 11px/1 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  transition: left var(--calc-dur-ui) var(--calc-ease-ui);
}

.calc-gauge__tag--be {
  left: calc(var(--calc-gauge-be) * 1%);
  color: var(--calc-dim);
}
.calc-gauge__tag--p {
  left: calc(var(--calc-gauge-p) * 1%);
  color: var(--calc-amber);
}

.calc-gauge__scale {
  display: flex;
  justify-content: space-between;
  margin-top: 9px;
  font: 500 10.5px/1 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  color: var(--calc-dim);
}

.calc-gauge__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 14px;
  font: 400 12px/1.5 var(--calc-sans);
  color: var(--calc-muted);
}

.calc-gauge__key {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.calc-gauge__swatch {
  width: 11px; height: 11px;
  flex: none;
  border-radius: 3px;
  border: 1px solid var(--calc-border);
}
.calc-gauge__swatch--be { background: var(--calc-dim); }
.calc-gauge__swatch--p { background: var(--calc-amber); }
.calc-gauge__swatch--edge { background: rgba(45, 212, 191, 0.45); }


/* ============================================================
   CALC-03 追加 §C  四格结果卡 calc-kv-*
   ============================================================ */

.calc-kv {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 22px 0 8px;
}

.calc-kv__cell {
  padding: 15px 16px 14px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: var(--calc-surface);
}

.calc-kv__cell--hi { border-color: var(--calc-border-teal); }

.calc-kv__k {
  margin: 0 0 7px;
  font: 500 11px/1.35 var(--calc-sans);
  letter-spacing: .04em;
  color: var(--calc-dim);
}

.calc-kv__v {
  font: 700 21px/1.1 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.025em;
  color: var(--calc-fg);
}

.calc-kv__v--pos { color: var(--calc-mint); }
.calc-kv__v--neg { color: #FCA5A5; }

.calc-kv__s {
  margin: 6px 0 0;
  font: 400 11.5px/1.5 var(--calc-sans);
  color: var(--calc-muted);
}

@media (max-width: 900px) {
  .calc-kv { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 460px) {
  .calc-kv { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .calc-verdict, .calc-gauge__fill, .calc-gauge__mark,
  .calc-gauge__dot, .calc-gauge__tag { transition: none !important; }
}

/* CALC-03 追加 §D  input grid  —— 四输入两列排布 */
.calc-fieldgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.calc-fieldgrid .calc-field { margin-top: 0; }
@media (max-width: 560px) {
  .calc-fieldgrid { grid-template-columns: 1fr; }
}

/* CALC-03 追加 §E  标题+导语 并排行 */
.calc-block__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-bottom: 2px;
}
.calc-block__head .calc-block__h { margin-bottom: 0; }
.calc-block__head .calc-block__d { margin-bottom: 0; }


/* ════════════════════════════════════════════════════════════════════
   CALC-04 CONSOLE —— 计算器主体（主角层）
   设计意图：把「输入 → 读数」压进首屏一屏内闭环。
   说明性内容全部下沉到 .calc-docs，与主体之间用一条分隔轨隔开。
   ════════════════════════════════════════════════════════════════════ */

.calc-console {
  position: relative;
  margin: 0 0 12px;
  padding: 0;
  border-radius: var(--calc-radius-lg);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(251, 191, 36, 0.075), transparent 58%),
    radial-gradient(110% 80% at 88% 4%, rgba(45, 212, 191, 0.065), transparent 60%),
    linear-gradient(180deg, rgba(19, 21, 32, 0.92), rgba(13, 13, 20, 0.96));
  border: 1px solid var(--calc-border-hi);
  box-shadow: var(--calc-shadow-lift);
  overflow: hidden;
}

/* 顶部一条能量轨：唯一的持续动效，48s 极慢，不抢注意力 */
.calc-console::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent, var(--calc-amber) 22%, var(--calc-teal) 52%,
    var(--calc-cyan) 74%, transparent);
  background-size: 220% 100%;
  animation: calc-rail 48s linear infinite;
  opacity: 0.72;
}
@keyframes calc-rail {
  from { background-position: 0% 0; }
  to   { background-position: 220% 0; }
}

.calc-console__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px 22px 14px;
  border-bottom: 1px solid var(--calc-border);
  background: rgba(7, 7, 12, 0.34);
}

.calc-console__id {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--calc-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--calc-amber);
}
.calc-console__id b {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--calc-mint);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.16);
}

.calc-console__q {
  flex: 1 1 320px;
  min-width: 0;
  font-family: var(--calc-serif);
  font-size: clamp(15px, 2.1vw, 19px);
  line-height: 1.45;
  color: var(--calc-fg);
  margin: 0;
}

/* ── 主体两段栅格：左输入台 / 右三栏读数 ───────────────────────── */
.calc-console__grid {
  display: grid;
  grid-template-columns: minmax(300px, 360px) 1fr;
  gap: 0;
  align-items: stretch;
}

/* ── 输入台 ─────────────────────────────────────────────────────── */
.calc-deck {
  padding: 20px 22px 22px;
  border-right: 1px solid var(--calc-border);
  background: rgba(7, 7, 12, 0.22);
}
.calc-deck__t {
  margin: 0 0 14px;
  font-family: var(--calc-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--calc-dim);
}
.calc-deck__row { margin: 0 0 16px; }
.calc-deck__row:last-child { margin-bottom: 0; }

.calc-deck__lbl {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin: 0 0 7px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--calc-muted);
}
.calc-deck__lbl em {
  font-style: normal;
  font-family: var(--calc-mono);
  font-size: 11px;
  color: var(--calc-dim);
}

/* 分段按钮组：盘口类型 / 水位口径 */
.calc-seg {
  display: flex;
  padding: 3px;
  gap: 3px;
  border-radius: var(--calc-radius-pill);
  border: 1px solid var(--calc-border);
  background: rgba(7, 7, 12, 0.5);
}
.calc-seg__b {
  flex: 1 1 0;
  padding: 8px 10px;
  border: 0;
  border-radius: var(--calc-radius-pill);
  background: transparent;
  color: var(--calc-muted);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--calc-dur-micro) var(--calc-ease-std),
              color var(--calc-dur-micro) var(--calc-ease-std),
              transform var(--calc-dur-micro) var(--calc-ease-ui);
}
.calc-seg__b:hover { color: var(--calc-fg); background: rgba(255, 255, 255, 0.05); }
.calc-seg__b:active { transform: scale(0.97); }
.calc-seg__b[aria-pressed="true"] {
  background: linear-gradient(180deg, rgba(251, 191, 36, 0.2), rgba(251, 191, 36, 0.1));
  color: var(--calc-amber);
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, 0.34);
}

/* 盘口值步进器 */
.calc-step {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  gap: 6px;
  align-items: stretch;
}
.calc-step__b {
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  background: rgba(255, 255, 255, 0.035);
  color: var(--calc-fg);
  font-family: var(--calc-mono);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--calc-dur-micro) var(--calc-ease-std),
              border-color var(--calc-dur-micro) var(--calc-ease-std),
              transform var(--calc-dur-micro) var(--calc-ease-ui);
}
.calc-step__b:hover {
  background: rgba(251, 191, 36, 0.13);
  border-color: var(--calc-border-hi);
}
.calc-step__b:active { transform: scale(0.94); }
.calc-step__v {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--calc-border-hi);
  border-radius: var(--calc-radius-sm);
  background: rgba(7, 7, 12, 0.62);
  font-family: var(--calc-mono);
  font-size: 21px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--calc-amber);
  letter-spacing: 0.01em;
}
.calc-step__v small {
  margin-left: 6px;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--calc-dim);
  text-transform: uppercase;
}

/* 水位双输入 */
.calc-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.calc-duo__c { display: flex; flex-direction: column; gap: 5px; }
.calc-duo__k {
  font-family: var(--calc-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--calc-dim);
}

.calc-num {
  width: 100%;
  padding: 10px 11px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  background: rgba(7, 7, 12, 0.62);
  color: var(--calc-fg);
  font-family: var(--calc-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  transition: border-color var(--calc-dur-micro) var(--calc-ease-std),
              box-shadow var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-num:focus {
  outline: none;
  border-color: var(--calc-teal);
  box-shadow: var(--calc-glow-teal);
}
.calc-num--bad { border-color: rgba(248, 113, 113, 0.6); }
.calc-num::placeholder { color: var(--calc-dim); }

.calc-deck__hint {
  margin: 7px 0 0;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--calc-dim);
}

/* ── 右侧三栏读数区 ─────────────────────────────────────────────── */
.calc-tri {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.calc-lane {
  position: relative;
  padding: 20px 18px 22px;
  border-right: 1px solid var(--calc-border);
  transition: background var(--calc-dur-ui) var(--calc-ease-std);
}
.calc-lane:last-child { border-right: 0; }
.calc-lane:hover { background: rgba(255, 255, 255, 0.018); }

/* 栏位来源标记：左边框 + 7% 底色，仅此二者承载状态语义 */
.calc-lane--direct { border-left: 2px solid var(--calc-teal); background: rgba(45, 212, 191, 0.045); }
.calc-lane--model  { border-left: 2px solid var(--calc-violet); background: rgba(167, 139, 250, 0.045); }
.calc-lane--est    { border-left: 2px solid var(--calc-amber-dim); background: rgba(180, 83, 9, 0.055); }

.calc-lane__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  margin: 0 0 4px;
}
.calc-lane__t {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--calc-fg);
}
.calc-lane__src {
  flex: 0 0 auto;
  padding: 2px 7px;
  border-radius: var(--calc-radius-pill);
  font-family: var(--calc-mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.calc-lane__src--direct { color: var(--calc-teal); background: rgba(45, 212, 191, 0.13); }
.calc-lane__src--model  { color: var(--calc-violet); background: rgba(167, 139, 250, 0.13); }
.calc-lane__src--est    { color: var(--calc-amber); background: rgba(251, 191, 36, 0.13); }

.calc-lane__sub {
  margin: 0 0 15px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--calc-dim);
}

/* 主读数：等宽 + tabular-nums 防抖行 */
.calc-readout {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 0 0 3px;
}
.calc-readout__v {
  font-family: var(--calc-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 650;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--calc-fg);
}
.calc-readout__u {
  font-family: var(--calc-mono);
  font-size: 13px;
  color: var(--calc-dim);
}
.calc-readout__k {
  margin: 0 0 14px;
  font-size: 11.5px;
  color: var(--calc-muted);
}

/* 键值读数行（1X2 三项 / 大小球四条线） */
.calc-rows { margin: 0; padding: 0; list-style: none; }
.calc-rows__i {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 7px 0;
  border-top: 1px solid var(--calc-border);
}
.calc-rows__i:first-child { border-top: 0; }
.calc-rows__k {
  font-size: 12.5px;
  color: var(--calc-muted);
  min-width: 0;
}
.calc-rows__p {
  font-family: var(--calc-mono);
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--calc-fg);
}
.calc-rows__d {
  font-family: var(--calc-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--calc-teal);
  min-width: 52px;
  text-align: right;
}
.calc-rows__i--hl .calc-rows__p { color: var(--calc-amber); }

/* 五态条：全赢/赢半/走盘/输半/全输 */
.calc-bar {
  display: flex;
  height: 12px;
  margin: 12px 0 9px;
  border-radius: var(--calc-radius-pill);
  overflow: hidden;
  background: rgba(7, 7, 12, 0.6);
  box-shadow: inset 0 0 0 1px var(--calc-border);
}
.calc-bar__s {
  height: 100%;
  transition: flex-basis var(--calc-dur-ui) var(--calc-ease-ui);
  flex-grow: 0;
  flex-shrink: 0;
}
.calc-bar__s--win  { background: linear-gradient(180deg, #34D399, #0F766E); }
.calc-bar__s--half { background: linear-gradient(180deg, #2DD4BF, #115E59); }
.calc-bar__s--push { background: linear-gradient(180deg, #9AA3B5, #4B5263); }
.calc-bar__s--hlos { background: linear-gradient(180deg, #FBBF24, #B45309); }
.calc-bar__s--lose { background: linear-gradient(180deg, #F87171, #991B1B); }

.calc-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.calc-legend__i {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--calc-muted);
}
.calc-legend__d {
  width: 8px; height: 8px;
  border-radius: 2px;
  flex: 0 0 auto;
}
.calc-legend__n {
  margin-left: auto;
  font-family: var(--calc-mono);
  font-variant-numeric: tabular-nums;
  color: var(--calc-fg);
}

/* 半仓拆分明细 */
.calc-split {
  margin: 14px 0 0;
  padding: 12px 13px;
  border-radius: var(--calc-radius);
  border: 1px dashed var(--calc-border-teal);
  background: rgba(45, 212, 191, 0.04);
}
.calc-split__t {
  margin: 0 0 9px;
  font-family: var(--calc-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--calc-teal);
}
.calc-split__tb {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--calc-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}
.calc-split__tb th {
  padding: 4px 6px 6px;
  text-align: right;
  font-weight: 500;
  color: var(--calc-dim);
  border-bottom: 1px solid var(--calc-border);
  letter-spacing: 0.04em;
}
.calc-split__tb th:first-child { text-align: left; }
.calc-split__tb td {
  padding: 5px 6px;
  text-align: right;
  color: var(--calc-fg);
  border-bottom: 1px solid var(--calc-grid);
}
.calc-split__tb td:first-child { text-align: left; color: var(--calc-amber); }
.calc-split__tb tr:last-child td { border-bottom: 0; }
.calc-split__z { color: var(--calc-dim); }

/* 底部状态条 */
.calc-console__foot {
  display: flex;
  align-items: center;
  gap: 10px 18px;
  flex-wrap: wrap;
  padding: 12px 22px;
  border-top: 1px solid var(--calc-border);
  background: rgba(7, 7, 12, 0.4);
  font-family: var(--calc-mono);
  font-size: 11px;
  color: var(--calc-dim);
}
.calc-console__foot b {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--calc-muted);
}
.calc-console__foot .calc-ok { color: var(--calc-mint); }
.calc-console__foot .calc-warn { color: var(--calc-amber); }

/* ── 说明区下沉：与主体之间用分隔轨隔开，默认收拢 ───────────────── */
.calc-docs {
  margin: 40px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--calc-border);
}
.calc-docs__t {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 4px;
  font-family: var(--calc-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--calc-dim);
}
.calc-docs__t::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--calc-border);
}
.calc-docs__lede {
  max-width: var(--calc-measure);
  margin: 0 0 20px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--calc-dim);
}

/* ── 响应式回退 ─────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .calc-console__grid { grid-template-columns: 1fr; }
  .calc-deck { border-right: 0; border-bottom: 1px solid var(--calc-border); }
  .calc-tri { grid-template-columns: 1fr; }
  .calc-lane { border-right: 0; border-bottom: 1px solid var(--calc-border); }
  .calc-lane:last-child { border-bottom: 0; }
}
@media (max-width: 560px) {
  .calc-duo { grid-template-columns: 1fr; }
  .calc-readout__v { font-size: 28px; }
  .calc-console__bar, .calc-deck, .calc-lane, .calc-console__foot { padding-left: 15px; padding-right: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  .calc-console::before { animation: none; }
  .calc-bar__s { transition: none; }
}

/* ═══════════════════════════════════════════════════════════════════
   CALC-04 幕3 · 交互态强化与主题突出
   目标：控制台是主角（按下有反馈、数字有权重、状态有颜色），
        说明文字是配角（低对比度、hover 才醒来）。
   ═══════════════════════════════════════════════════════════════════ */

/* ── 1. 分段切换器：选中态加顶部指示轨，让「当前口径」一眼可辨 ────── */
.calc-seg { position: relative; }
.calc-seg__b { position: relative; overflow: hidden; }
.calc-seg__b::after {
  content: "";
  position: absolute;
  inset: auto 24% 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--calc-amber);
  opacity: 0;
  transform: scaleX(0.3);
  transition: opacity var(--calc-dur-micro) var(--calc-ease-std),
              transform var(--calc-dur-micro) var(--calc-ease-ui);
}
.calc-seg__b[aria-pressed="true"]::after { opacity: 1; transform: scaleX(1); }
.calc-seg__b:focus-visible {
  outline: 2px solid var(--calc-teal);
  outline-offset: -2px;
}

/* ── 2. 步进按钮：压感（按下缩 + 琥珀底），键盘可达 ───────────────── */
.calc-step__b:focus-visible {
  outline: 2px solid var(--calc-teal);
  outline-offset: 1px;
}
.calc-step__b:active {
  background: rgba(251, 191, 36, 0.22);
  border-color: var(--calc-amber);
  color: var(--calc-amber);
}
.calc-step__b:disabled {
  opacity: 0.34;
  cursor: not-allowed;
  transform: none;
  background: rgba(255, 255, 255, 0.02);
}
/* 盘口值：主题主数字，给一层弱琥珀光晕，把视觉重心压在这里 */
.calc-step__v {
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, 0.14),
              0 0 22px rgba(251, 191, 36, 0.07);
  transition: box-shadow var(--calc-dur-ui) var(--calc-ease-std);
}
.calc-step:hover .calc-step__v {
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, 0.3),
              0 0 26px rgba(251, 191, 36, 0.12);
}

/* ── 3. 预设按钮：选中态已是实心琥珀，补键盘态与按下位移 ──────────── */
.calc-preset[aria-pressed="true"]:hover {
  color: var(--calc-bg);
  border-color: var(--calc-amber);
  background: #FCD34D;
}
.calc-preset:active { transform: translateY(1px) scale(0.97); }

/* ── 4. 三栏读数：hover 时该栏主题色抬升，形成「聚焦这一栏」的语义 ── */
.calc-lane {
  transition: background var(--calc-dur-ui) var(--calc-ease-std),
              box-shadow var(--calc-dur-ui) var(--calc-ease-std);
}
.calc-lane--direct:hover { background: rgba(45, 212, 191, 0.085); }
.calc-lane--model:hover  { background: rgba(167, 139, 250, 0.085); }
.calc-lane--est:hover    { background: rgba(180, 83, 9, 0.10); }
.calc-lane--direct:hover { box-shadow: inset 0 0 40px rgba(45, 212, 191, 0.05); }
.calc-lane--model:hover  { box-shadow: inset 0 0 40px rgba(167, 139, 250, 0.05); }
.calc-lane--est:hover    { box-shadow: inset 0 0 40px rgba(251, 191, 36, 0.05); }

.calc-lane__src {
  transition: background var(--calc-dur-micro) var(--calc-ease-std),
              box-shadow var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-lane--direct:hover .calc-lane__src--direct { box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.34); }
.calc-lane--model:hover  .calc-lane__src--model  { box-shadow: 0 0 0 1px rgba(167, 139, 250, 0.34); }
.calc-lane--est:hover    .calc-lane__src--est    { box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.34); }

/* 主读数：数字是页面的最高层级，等宽 + 防抖 + 换值时的色彩过渡 */
.calc-readout__v {
  font-variant-numeric: tabular-nums;
  transition: color var(--calc-dur-ui) var(--calc-ease-std);
}
.calc-lane--direct .calc-readout__v { color: var(--calc-teal); }
.calc-lane--model  .calc-readout__v { color: var(--calc-violet); }
.calc-lane--est    .calc-readout__v { color: var(--calc-amber); }

/* ── 5. 结算明细行：高亮行补左侧琥珀轨（只做 2px 边框，不上底色渐变）─ */
.calc-rows__i {
  position: relative;
  transition: background var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-rows__i:hover { background: rgba(255, 255, 255, 0.022); }
.calc-rows__i--hl { background: rgba(251, 191, 36, 0.05); }
.calc-rows__i--hl::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--calc-amber);
}
.calc-rows__i--hl .calc-rows__k { color: var(--calc-fg); }

/* ── 6. 五段条：段间加细分隔、hover 时未聚焦段降饱和，突出主段 ────── */
.calc-bar { position: relative; }
.calc-bar__s {
  box-shadow: inset -1px 0 0 rgba(7, 7, 12, 0.45);
  transition: flex-basis var(--calc-dur-ui) var(--calc-ease-ui),
              filter var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-bar__s:last-child { box-shadow: none; }
.calc-bar:hover .calc-bar__s { filter: saturate(0.55) brightness(0.82); }
.calc-bar:hover .calc-bar__s:hover { filter: saturate(1.15) brightness(1.1); }

.calc-legend__i {
  transition: color var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-legend__i:hover { color: var(--calc-fg); }
.calc-legend__n { transition: color var(--calc-dur-micro) var(--calc-ease-std); }

/* ── 7. 半仓拆分表：hover 行提亮，让逐格核对不串行 ───────────────── */
.calc-split__tb tbody tr { transition: background var(--calc-dur-micro) var(--calc-ease-std); }
.calc-split__tb tbody tr:hover { background: rgba(45, 212, 191, 0.06); }

/* ── 8. 说明层降权：默认低对比度，hover / focus-within 才恢复 ─────── */
.calc-docs .calc-block,
.calc-docs .calc-panel,
.calc-docs .calc-why {
  opacity: 0.82;
  transition: opacity var(--calc-dur-ui) var(--calc-ease-std);
}
.calc-docs .calc-block:hover,
.calc-docs .calc-panel:hover,
.calc-docs .calc-why:hover,
.calc-docs .calc-block:focus-within,
.calc-docs .calc-panel:focus-within,
.calc-docs .calc-why:focus-within { opacity: 1; }

.calc-docs .calc-panel__t { font-size: 14.5px; letter-spacing: -0.008em; }
.calc-docs .calc-panel__hint { color: var(--calc-dim); }

/* 说明层里的 details 摘要：给一个明确的可点提示，但不抢色 */
.calc-why__body { color: var(--calc-muted); }
.calc-why > summary { transition: color var(--calc-dur-micro) var(--calc-ease-std); }
.calc-why > summary:hover { color: var(--calc-amber); }
.calc-why > summary:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 2px; }

/* ── 9. 交叉链接卡：抬升 1px，标签色随主题 ───────────────────────── */
.calc-link {
  transition: border-color var(--calc-dur-micro) var(--calc-ease-std),
              background var(--calc-dur-micro) var(--calc-ease-std),
              transform var(--calc-dur-micro) var(--calc-ease-ui);
}
.calc-link:hover { transform: translateY(-1px); }
.calc-link:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 2px; }

/* ── 10. 降级：动效敏感用户只保留颜色变化，去掉所有位移与滤镜 ─────── */
@media (prefers-reduced-motion: reduce) {
  .calc-seg__b::after { transition: none; transform: none; }
  .calc-step__b:active,
  .calc-preset:active,
  .calc-link:hover { transform: none; }
  .calc-bar:hover .calc-bar__s,
  .calc-bar:hover .calc-bar__s:hover { filter: none; }
  .calc-lane, .calc-step__v, .calc-rows__i, .calc-split__tb tbody tr { transition: none; }
}


/* ═══════════════════════════════════════════════════════════════════
   CALC-04 幕3.5 · 框体突出 + 互动强化
   起因：单列骨架（.calc-tool--stack）让 console 拿到全部 1160px 后，
        原先为 360px 窄栏调的边框与留白显得过轻，撑不住主角地位。
   目标：一、框体有明确边界与体量；二、每个可操作元素都有按下反馈。
   ═══════════════════════════════════════════════════════════════════ */

/* ── A. 框体分量：双层边框 + 常驻光晕，让 console 从背景里立起来 ──── */
.calc-tool--stack .calc-console {
  border-width: 1px;
  border-color: rgba(251, 191, 36, 0.22);
  box-shadow:
    0 0 0 1px rgba(7, 7, 12, 0.9),
    0 32px 80px rgba(0, 0, 0, 0.58),
    0 0 64px rgba(251, 191, 36, 0.05);
  transition: box-shadow var(--calc-dur-ui) var(--calc-ease-std),
              border-color var(--calc-dur-ui) var(--calc-ease-std);
}
/* 焦点在控制台内部时，整框光晕收紧 —— 「我正在用这个工具」 */
.calc-tool--stack .calc-console:focus-within {
  border-color: rgba(45, 212, 191, 0.4);
  box-shadow:
    0 0 0 1px rgba(7, 7, 12, 0.9),
    0 32px 80px rgba(0, 0, 0, 0.58),
    0 0 72px rgba(45, 212, 191, 0.1);
}

/* 顶部能量轨加粗，宽框下 2px 显细 */
.calc-tool--stack .calc-console::before { height: 3px; opacity: 0.85; }

/* ── B. 标题栏：宽度富余后给标题真正的层级 ────────────────────────── */
.calc-tool--stack .calc-console__bar {
  padding: 20px 26px 18px;
  gap: 18px;
}
.calc-tool--stack .calc-console__q {
  font-size: clamp(17px, 1.5vw, 22px);
  letter-spacing: -0.01em;
}
.calc-tool--stack .calc-console__id {
  padding: 5px 11px;
  border: 1px solid rgba(251, 191, 36, 0.28);
  border-radius: var(--calc-radius-pill);
  background: rgba(251, 191, 36, 0.07);
}
/* LIVE 指示点：4s 呼吸，标明「读数随输入实时重算」 */
.calc-tool--stack .calc-console__id b { animation: calc-pulse 4s var(--calc-ease-std) infinite; }
@keyframes calc-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.16); }
  50%      { box-shadow: 0 0 0 6px rgba(52, 211, 153, 0.04); }
}

/* ── C. 内部分栏留白：宽框下 22px 太局促 ─────────────────────────── */
.calc-tool--stack .calc-console__grid { grid-template-columns: minmax(320px, 380px) 1fr; }
.calc-tool--stack .calc-deck          { padding: 24px 26px 26px; }
.calc-tool--stack .calc-lane          { padding: 24px 22px 26px; }
.calc-tool--stack .calc-console__foot { padding: 14px 26px; }

/* 输入台与读数区之间的分隔升级为发光轨，强化「输入 → 输出」的方向感 */
.calc-tool--stack .calc-deck {
  border-right: 1px solid transparent;
  border-image: linear-gradient(180deg,
    transparent, rgba(251, 191, 36, 0.3) 18%,
    rgba(45, 212, 191, 0.3) 78%, transparent) 1;
}

/* ── D. 三栏读数：宽度到位后放大主数字，坐实「一眼可读」 ──────────── */
.calc-tool--stack .calc-readout__v { font-size: clamp(32px, 2.9vw, 46px); }
.calc-tool--stack .calc-lane__t    { font-size: 14px; }
.calc-tool--stack .calc-lane__sub  { font-size: 12px; }
.calc-tool--stack .calc-rows__k    { font-size: 13px; }
.calc-tool--stack .calc-rows__p    { font-size: 15px; }
.calc-tool--stack .calc-rows__d    { font-size: 13px; min-width: 60px; }
.calc-tool--stack .calc-rows__i    { padding: 9px 0; }
/* 五段条加高，宽框下 12px 显得像根线 */
.calc-tool--stack .calc-bar        { height: 16px; margin: 16px 0 11px; }
.calc-tool--stack .calc-legend     { gap: 6px 16px; }
.calc-tool--stack .calc-legend__i  { font-size: 11.5px; }

/* 栏位左边框加粗：来源语义（直算 / 模型 / 估算）在宽栏下要看得见 */
.calc-tool--stack .calc-lane--direct,
.calc-tool--stack .calc-lane--model,
.calc-tool--stack .calc-lane--est { border-left-width: 3px; }

/* ── E. 互动强化 1：栏位可聚焦，键盘 Tab 能逐栏检视 ───────────────── */
.calc-lane[tabindex] { cursor: default; outline: none; }
.calc-lane[tabindex]:focus-visible {
  outline: 2px solid var(--calc-teal);
  outline-offset: -3px;
}
/* 聚焦栏抬升：与 hover 同强度，键鼠体验一致 */
.calc-lane--direct:focus-within { background: rgba(45, 212, 191, 0.085); }
.calc-lane--model:focus-within  { background: rgba(167, 139, 250, 0.085); }
.calc-lane--est:focus-within    { background: rgba(180, 83, 9, 0.10); }

/* ── F. 互动强化 2：读数可点复制，hover 才显提示（不干扰静态阅读）── */
.calc-readout { position: relative; }
.calc-readout__v[data-copy] {
  cursor: pointer;
  border-radius: var(--calc-radius-sm);
  transition: color var(--calc-dur-ui) var(--calc-ease-std),
              background var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-readout__v[data-copy]:hover  { background: rgba(255, 255, 255, 0.05); }
.calc-readout__v[data-copy]:active { background: rgba(251, 191, 36, 0.14); }
.calc-readout__v[data-copy]:focus-visible {
  outline: 2px solid var(--calc-teal);
  outline-offset: 2px;
}
/* 复制成功回执：140ms 出现，不阻塞后续操作 */
.calc-readout__v[data-copied]::after {
  content: "已复制";
  position: absolute;
  top: -6px; left: 100%;
  margin-left: 8px;
  padding: 3px 8px;
  border-radius: var(--calc-radius-pill);
  background: rgba(52, 211, 153, 0.16);
  border: 1px solid rgba(52, 211, 153, 0.34);
  font-family: var(--calc-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--calc-mint);
  white-space: nowrap;
  animation: calc-receipt var(--calc-dur-ui) var(--calc-ease-pop);
}
@keyframes calc-receipt {
  from { opacity: 0; transform: translateY(3px) scale(0.94); }
  to   { opacity: 1; transform: none; }
}

/* ── G. 互动强化 3：盘口滑杆 —— 拖着扫盘口，比点 ± 快一个量级 ────── */
.calc-step__r {
  width: 100%;
  margin: 11px 0 0;
  height: 22px;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  cursor: grab;
}
.calc-step__r:active { cursor: grabbing; }
.calc-step__r::-webkit-slider-runnable-track {
  height: 5px;
  border-radius: var(--calc-radius-pill);
  background: linear-gradient(90deg,
    rgba(248, 113, 113, 0.42), rgba(155, 163, 181, 0.3) 50%, rgba(52, 211, 153, 0.42));
  box-shadow: inset 0 0 0 1px var(--calc-border);
}
.calc-step__r::-moz-range-track {
  height: 5px;
  border-radius: var(--calc-radius-pill);
  background: linear-gradient(90deg,
    rgba(248, 113, 113, 0.42), rgba(155, 163, 181, 0.3) 50%, rgba(52, 211, 153, 0.42));
  box-shadow: inset 0 0 0 1px var(--calc-border);
}
.calc-step__r::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 17px; height: 17px;
  margin-top: -6px;
  border-radius: 50%;
  border: 2px solid var(--calc-bg);
  background: var(--calc-amber);
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.5), 0 2px 8px rgba(0, 0, 0, 0.5);
  transition: transform var(--calc-dur-micro) var(--calc-ease-ui),
              box-shadow var(--calc-dur-micro) var(--calc-ease-std);
}
.calc-step__r::-moz-range-thumb {
  width: 17px; height: 17px;
  border-radius: 50%;
  border: 2px solid var(--calc-bg);
  background: var(--calc-amber);
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.5), 0 2px 8px rgba(0, 0, 0, 0.5);
  transition: transform var(--calc-dur-micro) var(--calc-ease-ui);
}
.calc-step__r:hover::-webkit-slider-thumb  { transform: scale(1.14); }
.calc-step__r:active::-webkit-slider-thumb {
  transform: scale(1.22);
  box-shadow: 0 0 0 1px var(--calc-amber), 0 0 18px rgba(251, 191, 36, 0.34);
}
.calc-step__r:hover::-moz-range-thumb  { transform: scale(1.14); }
.calc-step__r:active::-moz-range-thumb { transform: scale(1.22); }
.calc-step__r:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 3px; }

/* ── H. 互动强化 4：输入框 hover 就有反馈，不必等聚焦 ─────────────── */
.calc-num:hover:not(:focus) {
  border-color: var(--calc-border-hi);
  background: rgba(7, 7, 12, 0.78);
}
/* 数字变化的一瞬给个极短提示（由 JS 打 data-flash） */
.calc-num[data-flash] { animation: calc-flash var(--calc-dur-ui) var(--calc-ease-std); }
@keyframes calc-flash {
  from { border-color: var(--calc-teal); box-shadow: var(--calc-glow-teal); }
  to   { border-color: var(--calc-border); box-shadow: none; }
}

/* ── I. 互动强化 5：预设按钮补键盘热区提示 ───────────────────────── */
.calc-preset:focus-visible { outline: 2px solid var(--calc-teal); outline-offset: 2px; }
.calc-preset::after {
  content: attr(data-key);
  margin-left: 6px;
  font-family: var(--calc-mono);
  font-size: 9.5px;
  opacity: 0.5;
}

/* ── J. 响应式：单列骨架在窄屏退回纵向，读数字号同步收 ───────────── */
@media (max-width: 1080px) {
  .calc-tool--stack .calc-console__grid { grid-template-columns: 1fr; }
  .calc-tool--stack .calc-deck {
    border-right: 0;
    border-image: none;
    border-bottom: 1px solid var(--calc-border);
  }
  .calc-tool--stack .calc-readout__v { font-size: clamp(30px, 5vw, 40px); }
}
@media (max-width: 560px) {
  .calc-tool--stack .calc-console__bar,
  .calc-tool--stack .calc-deck,
  .calc-tool--stack .calc-lane,
  .calc-tool--stack .calc-console__foot { padding-left: 16px; padding-right: 16px; }
  .calc-tool--stack .calc-readout__v { font-size: 30px; }
  .calc-readout__v[data-copied]::after { left: auto; right: 0; top: -22px; }
}

/* ── K. 降级兜底：动效敏感用户去掉所有位移、缩放、呼吸 ───────────── */
@media (prefers-reduced-motion: reduce) {
  .calc-tool--stack .calc-console__id b { animation: none; }
  .calc-readout__v[data-copied]::after { animation: none; }
  .calc-num[data-flash] { animation: none; }
  .calc-step__r::-webkit-slider-thumb,
  .calc-step__r::-moz-range-thumb { transition: none; }
  .calc-step__r:hover::-webkit-slider-thumb,
  .calc-step__r:active::-webkit-slider-thumb,
  .calc-step__r:hover::-moz-range-thumb,
  .calc-step__r:active::-moz-range-thumb { transform: none; }
  .calc-tool--stack .calc-console,
  .calc-readout__v[data-copy] { transition: none; }
}

/* ── L. CALC-05 泊松矩阵：热力梯度 + 预设高亮 + 对角线降级 ─────────── */

/* L1. 预设高亮：JS 写的是 data-on，补齐与 aria-pressed 同权的视觉态。
   蓝框深色态，不用鲜艳渐变内联。 */
.calc-preset[data-on] {
  color: var(--calc-fg);
  background: rgba(59, 130, 246, .10);
  border-color: rgba(59, 130, 246, .38);
}
.calc-preset[data-on]:hover { border-color: rgba(59, 130, 246, .52); }
.calc-preset[data-on]::after { opacity: 1; }

/* L2. 热力梯度：--h 由 JS 按 v/mmax 写入 [0,1]，此处唯一消费点。
   底色走琥珀低透明度，文字亮度随热度抬升，保证低热格仍 ≥ 4.5:1。 */
#mx-table tbody td {
  --h: 0;
  position: relative;
  background: rgba(251, 191, 36, calc(var(--h) * .17));
  color: color-mix(in srgb, var(--calc-muted), var(--calc-fg) calc(var(--h) * 100%));
  font-variant-numeric: tabular-nums;
  transition: background-color var(--calc-dur-micro) var(--calc-ease-ui),
              color var(--calc-dur-micro) var(--calc-ease-ui);
}
@supports not (color: color-mix(in srgb, red, blue)) {
  #mx-table tbody td { color: var(--calc-fg); }
}
/* 峰值格（热度 > .62）转琥珀实色，读者一眼锁定最可能比分 */
#mx-table tbody td:hover {
  background: rgba(251, 191, 36, calc(var(--h) * .17 + .07));
  color: var(--calc-fg);
}

/* 行计 / 列计 / 总计：边际列不参与热力，改用中性描边区隔 */
#mx-table tbody td[data-set^="row,"],
#mx-table tfoot td {
  background: rgba(255, 255, 255, .022);
  color: var(--calc-muted);
}
#mx-table tbody td[data-set^="row,"] { border-left: 1px solid var(--calc-border); }
#mx-table tfoot td[data-set="all"] { color: var(--calc-teal); font-weight: 700; }

/* L3. 对角线降级：JS 复用 calc-fmt__cell 标记平局格，但该类是卡片语义
   （display:grid + padding:12px + radius），套进 <td> 会撑破矩阵。
   在表格作用域内清掉盒模型，只保留“这是平局”的语义提示。 */
#mx-table td.calc-fmt__cell {
  display: table-cell;
  padding: 9px 10px;
  border: 0;
  border-radius: 0;
  gap: 0;
  box-shadow: inset 0 0 0 1px rgba(45, 212, 191, .30);
  transform: none;
}
#mx-table td.calc-fmt__cell:hover {
  transform: none;
  box-shadow: inset 0 0 0 1px rgba(45, 212, 191, .52);
}

/* L4. 动效兜底：矩阵热力过渡与预设态在 reduce 下静止 */
@media (prefers-reduced-motion: reduce) {
  #mx-table tbody td { transition: none; }
  .calc-preset[data-on] { transition: none; }
}


/* ═══════════════════════════════════════════════════════════════════
   14. 泊松页四块可读性修复（新增子命名空间，不覆写既有规则）
       14.1 calc-tenet  — 带序号的「长标题 + 正文」前提列表
       14.2 calc-facet  — 两栏并排切片（真正的分栏容器）
       14.3 calc-flow   — 纵向推导流（宽公式不被 258px 挤压）
       14.4 calc-shout  — 脚本原始输出代码块
   ═══════════════════════════════════════════════════════════════════ */

/* ── 14.1 前提 / 保证列表：整句标题独占一行，序号做左侧计数轨 ────── */
.calc-tenet {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
  counter-reset: tenet;
}

.calc-tenet > li {
  counter-increment: tenet;
  position: relative;
  padding: 13px 16px 13px 46px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: var(--calc-surface);
  font: 400 13.4px/1.72 var(--calc-sans);
  color: var(--calc-muted);
}

.calc-tenet > li::before {
  content: counter(tenet, decimal-leading-zero);
  position: absolute;
  top: 13px;
  left: 16px;
  font: 700 11px/1.7 var(--calc-mono);
  letter-spacing: 0.06em;
  color: var(--calc-amber);
}

.calc-tenet__t {
  display: block;
  margin: 0 0 4px;
  font: 640 14.5px/1.55 var(--calc-sans);
  letter-spacing: -0.012em;
  color: var(--calc-fg);
}

.calc-tenet__t b,
.calc-tenet__t strong { font-weight: 640; }

@media (max-width: 560px) {
  .calc-tenet > li { padding: 12px 13px 12px 13px; }
  .calc-tenet > li::before { position: static; display: block; margin-bottom: 5px; }
}

/* ── 14.2 两栏切片：真正的分栏容器（calc-split__z 是表格零值单元格，勿混用）─ */
.calc-facet {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(288px, 1fr));
  gap: 14px;
  align-items: start;
}

.calc-facet__z {
  padding: 16px 17px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  background: var(--calc-surface);
}

.calc-facet__t {
  margin: 0 0 10px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--calc-border);
  font: 700 10.5px/1.4 var(--calc-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--calc-teal);
}

.calc-facet__z .calc-note { margin: 11px 0 0; }

@media (max-width: 620px) {
  .calc-facet { grid-template-columns: 1fr; gap: 11px; }
  .calc-facet__z { padding: 13px 14px; }
}

/* ── 14.3 纵向推导流：宽 MathML 需要整幅宽度，不进 258px 网格 ─────── */
.calc-flow {
  display: grid;
  gap: 0;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius);
  overflow: hidden;
  background: var(--calc-bg);
  counter-reset: flow;
}

.calc-flow__s {
  counter-increment: flow;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 14px;
  padding: 20px 22px;
  border-top: 1px solid var(--calc-border);
}

.calc-flow__s:first-child { border-top: 0; }

.calc-flow__s::before {
  content: counter(flow, decimal-leading-zero);
  grid-row: 1 / span 2;
  align-self: start;
  padding-top: 1px;
  font: 700 15px/1.35 var(--calc-mono);
  letter-spacing: 0.04em;
  color: var(--calc-amber);
}

.calc-flow__t {
  grid-column: 2;
  margin: 0 0 11px;
  font: 640 15.5px/1.4 var(--calc-sans);
  letter-spacing: -0.014em;
  color: var(--calc-fg);
}

.calc-flow__b { grid-column: 2; min-width: 0; }

.calc-flow__b .calc-math { margin: 0; }

@media (max-width: 560px) {
  .calc-flow__s { grid-template-columns: 1fr; padding: 16px 14px; }
  .calc-flow__s::before { grid-row: auto; margin-bottom: 6px; }
  .calc-flow__t { grid-column: 1; font-size: 14.5px; }
  .calc-flow__b { grid-column: 1; }
}

/* ── 14.4 脚本原始输出：等宽代码块（CSS 原先无任何 pre 规则）──────── */
.calc-shout {
  margin: 0;
  padding: 15px 17px;
  border: 1px solid var(--calc-border);
  border-left: 2px solid var(--calc-amber);
  border-radius: 0 var(--calc-radius) var(--calc-radius) 0;
  background: rgba(255, 255, 255, 0.028);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.calc-shout > code {
  display: block;
  font: 500 11.8px/1.75 var(--calc-mono);
  font-variant-numeric: tabular-nums;
  color: var(--calc-muted);
  white-space: pre;
  tab-size: 2;
}

@media (max-width: 560px) {
  .calc-shout { padding: 12px 13px; }
  .calc-shout > code { font-size: 10.8px; line-height: 1.68; }
}

@media print {
  .calc-shout { border-left-width: 1px; background: none; }
}