/* ============================================================
   BRUCE — official site
   site.css : page composition, section by section
   ============================================================ */

/* ================================================================
   MASTHEAD
   ================================================================ */
.masthead {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  align-items: center;
  column-gap: var(--gap);
  height: 62px;
  padding-inline: var(--gutter);
  border-bottom: var(--hairline) solid transparent;
  background: transparent;
  transition: background-color 420ms var(--ease), border-color 420ms var(--ease),
    backdrop-filter 420ms var(--ease);
}

.masthead.is-stuck {
  background: rgba(241, 239, 233, 0.86);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--rule);
}

.masthead__mark {
  grid-column: 1 / span 3;
  display: inline-flex;
  align-items: baseline;
  gap: 0.62em;
  font-size: 0.94rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.masthead__mark .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  transform: translateY(-1px);
}

.masthead__nav {
  grid-column: 5 / span 6;
  display: flex;
  justify-content: center;
  gap: clamp(14px, 2.1vw, 34px);
}

.masthead__nav a {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-52);
  transition: color 220ms var(--ease);
}

.masthead__nav a .n {
  display: inline-block;
  margin-right: 0.5em;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--ink-24);
}

.masthead__nav a:hover,
.masthead__nav a.is-active { color: var(--ink); }

.masthead__meta {
  grid-column: 11 / span 2;
  display: flex;
  justify-content: flex-end;
  align-items: baseline;
  gap: 1.1em;
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-52);
}

.masthead__meta .ver { font-variant-numeric: lining-nums tabular-nums; }

@media (max-width: 860px) {
  .masthead__nav { grid-column: 4 / span 7; justify-content: flex-start; }
  .masthead__nav a:nth-child(3),
  .masthead__nav a:nth-child(5) { display: none; }
  .masthead__meta .ver { display: none; }
}

@media (max-width: 560px) {
  .masthead__nav { display: none; }
  .masthead__meta { grid-column: 8 / span 5; }
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  padding-top: clamp(104px, 17vh, 188px);
  padding-bottom: clamp(40px, 6vh, 74px);
}

.hero__eyebrow {
  display: flex;
  align-items: baseline;
  gap: 1.1em;
  margin-bottom: clamp(28px, 5vh, 62px);
}

.hero__eyebrow .bar {
  flex: 0 0 46px;
  height: var(--hairline);
  background: var(--rule-strong);
  transform: translateY(-4px);
}

.hero__title {
  font-weight: 400;
  font-size: var(--t-display);
  line-height: 0.845;
  letter-spacing: -0.042em;
  margin: 0;
  max-width: 13ch;
}

.hero__title span {
  display: block;
  white-space: nowrap;
}

.hero__title em {
  font-style: italic;
  letter-spacing: -0.03em;
}

.hero__foot {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(26px, 4vh, 44px);
  align-items: end;
  margin-top: clamp(46px, 7.5vh, 96px);
}

.hero__lede {
  grid-column: 1 / span 4;
  font-size: var(--t-body);
  line-height: 1.62;
  color: var(--ink-70);
  max-width: 34ch;
  margin: 0;
  text-wrap: pretty;
}

.hero__action { grid-column: 6 / span 4; display: flex; flex-direction: column; align-items: flex-start; gap: 1.15em; }

.hero__action .aside {
  font-size: var(--t-small);
  color: var(--ink-52);
  font-style: italic;
}

.hero__spec {
  grid-column: 10 / span 3;
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 0.5em;
  margin: 0;
  padding-top: 0.85em;
  border-top: var(--hairline) solid var(--rule);
}

.hero__spec div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1em;
  font-size: var(--t-small);
}

.hero__spec dt {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-38);
}

.hero__spec dd { margin: 0; font-variant-numeric: lining-nums tabular-nums; }

@media (max-width: 900px) {
  .hero__lede { grid-column: 1 / span 7; }
  .hero__action { grid-column: 1 / span 8; margin-top: 4px; }
  .hero__spec { grid-column: 1 / span 8; }
}

/* ================================================================
   SECTION CHROME
   ================================================================ */
.section {
  padding-block: var(--section);
  position: relative;
}

.section--plate {
  background: var(--paper-warm);
  border-top: var(--hairline) solid var(--rule);
  border-bottom: var(--hairline) solid var(--rule);
}

.section__head {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(22px, 3.5vh, 40px);
  align-items: start;
}

.section__label {
  grid-column: 1 / span 3;
  display: flex;
  flex-direction: column;
  gap: 0.9em;
}

.section__label .idx {
  font-size: var(--t-micro);
  letter-spacing: 0.24em;
  color: var(--ink);
}

.section__label .name {
  font-size: var(--t-micro);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-38);
}

.section__label .line {
  width: 100%;
  height: var(--hairline);
  background: var(--rule);
  margin-top: 0.3em;
}

.section__title { grid-column: 4 / span 9; }

@media (max-width: 900px) {
  .section__label { grid-column: 1 / span 12; flex-direction: row; align-items: center; gap: 1.4em; }
  .section__label .line { flex: 1; width: auto; margin: 0; }
  .section__title { grid-column: 1 / span 12; }
}

/* ================================================================
   01 — THE PANEL
   ================================================================ */
.panel-section {
  background:
    radial-gradient(120% 80% at 74% 6%, rgba(77, 122, 82, 0.09) 0%, rgba(77, 122, 82, 0) 58%),
    radial-gradient(90% 70% at 96% 92%, rgba(140, 120, 96, 0.14) 0%, rgba(140, 120, 96, 0) 62%),
    var(--paper-warm);
  border-top: var(--hairline) solid var(--rule);
  border-bottom: var(--hairline) solid var(--rule);
}

.panel-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  align-items: start;
  margin-top: clamp(40px, 6vh, 76px);
}

.panel-copy {
  grid-column: 1 / span 4;
  display: flex;
  flex-direction: column;
  gap: 1.4em;
  position: sticky;
  top: 96px;
}

.panel-copy .body-copy { max-width: 40ch; }

.panel-controls {
  display: flex;
  flex-direction: column;
  gap: 1.1em;
  margin-top: 0.4em;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.6em;
}

.control-group .label { color: var(--ink-38); }

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: var(--hairline) solid var(--rule-strong);
  width: fit-content;
}

.seg button {
  font-size: var(--t-small);
  letter-spacing: 0.02em;
  padding: 0.52em 1em 0.58em;
  color: var(--ink-52);
  border-right: var(--hairline) solid var(--rule);
  transition: background-color 240ms var(--ease), color 240ms var(--ease);
}

.seg button:last-child { border-right: 0; }

.seg button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.seg button:hover:not([aria-pressed="true"]) { background: rgba(23, 22, 15, 0.05); }

.panel-hint {
  font-size: var(--t-small);
  font-style: italic;
  color: var(--ink-38);
  max-width: 34ch;
}

/* ---- stage ------------------------------------------------------ */
.panel-stage {
  grid-column: 5 / span 8;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(24px, 4vw, 56px) clamp(10px, 3vw, 48px);
  min-height: 620px;
}

.panel-stage__ground {
  position: absolute;
  inset: 8% 4% 12%;
  background:
    radial-gradient(70% 60% at 50% 22%, rgba(255, 253, 246, 0.9), rgba(255, 253, 246, 0) 70%),
    linear-gradient(180deg, rgba(255, 254, 250, 0.55), rgba(255, 254, 250, 0));
  pointer-events: none;
}

/* annotations: hairline + italic caption, museum-label style */
.anno {
  position: absolute;
  display: flex;
  align-items: flex-start;
  gap: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 700ms var(--ease) 240ms;
}

.panel-layout.is-in .anno { opacity: 1; }

.anno__line {
  height: var(--hairline);
  background: var(--ink-38);
  flex: 0 0 auto;
  width: var(--anno-len, 62px);
  margin-top: 0.55em;
}

.anno__text {
  font-size: 0.72rem;
  line-height: 1.45;
  font-style: italic;
  color: var(--ink-52);
  width: 15ch;
  padding-left: 0.6em;
}

.anno--right { flex-direction: row; }
.anno--left { flex-direction: row-reverse; }

@media (max-width: 1180px) {
  .anno { display: none; }
  .panel-stage { grid-column: 5 / span 8; min-height: 0; }
  .panel-copy { grid-column: 1 / span 12; position: static; flex-direction: row; flex-wrap: wrap; gap: 2em; }
  .panel-copy > * { flex: 1 1 280px; }
}

@media (max-width: 780px) {
  .panel-stage { grid-column: 1 / span 12; padding-inline: 0; }
}

/* ================================================================
   02 — THE DESK
   ================================================================ */
.desk-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(34px, 5vh, 56px);
  align-items: start;
  margin-top: clamp(40px, 6vh, 72px);
}

.desk-copy { grid-column: 1 / span 4; }

.desk-index {
  grid-column: 6 / span 7;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}

.desk-index li {
  display: grid;
  grid-template-columns: 2.8em minmax(0, 1fr);
  align-items: baseline;
  column-gap: 1.1em;
  row-gap: 0.15em;
  padding: 0.9em 0.4em 0.95em;
  border-top: var(--hairline) solid var(--rule);
  transition: background-color 320ms var(--ease), padding-left 320ms var(--ease),
    color 320ms var(--ease);
}

.desk-index li:last-child { border-bottom: var(--hairline) solid var(--rule); }

.desk-index .i {
  font-size: var(--t-micro);
  letter-spacing: 0.08em;
  color: var(--ink-24);
  font-variant-numeric: lining-nums tabular-nums;
}

.desk-index .n {
  font-size: clamp(1.02rem, 1.35vw, 1.3rem);
  letter-spacing: -0.012em;
}

.desk-index .s {
  grid-column: 2;
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-38);
}

.desk-index li:hover,
.desk-index li.is-current {
  background: var(--green-wash);
  padding-left: 0.9em;
}

.desk-index li.is-current .i { color: var(--green-deep); }

.desk-hint {
  margin-top: clamp(26px, 4vh, 40px);
  max-width: 46ch;
}

.desk-window-wrap {
  width: 100%;
  margin-top: clamp(26px, 4vh, 44px);
  display: flex;
  justify-content: center;
  overflow: hidden;
}

@media (max-width: 980px) {
  .desk-copy { grid-column: 1 / span 12; }
  .desk-index { grid-column: 1 / span 12; }
  .desk-copy .body-copy { max-width: 62ch; }
}

/* ================================================================
   03 — THE RECORD
   ================================================================ */
.record-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(36px, 6vh, 64px);
  margin-top: clamp(46px, 7vh, 88px);
  align-items: start;
}

.record-heat { grid-column: 1 / span 7; }

.record-copy { grid-column: 9 / span 4; }

.record-copy .h3 { margin-bottom: 1.1em; }

.record-copy .body-copy { font-size: var(--t-small); }

.stat-list {
  margin: 2.2em 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}

.stat-list li {
  display: flex;
  align-items: baseline;
  gap: 1.1em;
  padding: 1.05em 0 1.1em;
  border-top: var(--hairline) solid var(--rule);
  transition: background-color 320ms var(--ease);
}

.stat-list li:last-child { border-bottom: var(--hairline) solid var(--rule); }

.stat-list .k {
  font-size: var(--t-small);
  color: var(--ink-52);
  flex: 1 1 auto;
  letter-spacing: 0.01em;
}

.stat-list .v {
  font-size: clamp(1.25rem, 1.9vw, 1.7rem);
  letter-spacing: -0.02em;
  font-variant-numeric: lining-nums tabular-nums;
  white-space: nowrap;
}

@media (max-width: 980px) {
  .record-heat { grid-column: 1 / span 12; }
  .record-copy { grid-column: 1 / span 12; }
}

/* ---------------------------------------------------------------- heatmap */
.heatmap {
  display: flex;
  flex-direction: column;
  gap: 12px;
  --cell: clamp(12px, 1.42vw, 19px);
  --cell-gap: clamp(4px, 0.46vw, 6px);
}

.heatmap__months {
  display: grid;
  grid-template-columns: repeat(26, var(--cell));
  gap: var(--cell-gap);
  margin-bottom: -0.2em;
}

.heatmap__months span {
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-38);
  white-space: nowrap;
  grid-row: 1;
}

.heatmap__grid {
  display: grid;
  grid-template-columns: repeat(26, var(--cell));
  grid-template-rows: repeat(7, var(--cell));
  gap: var(--cell-gap);
}

.heatmap__cell {
  width: var(--cell);
  height: var(--cell);
  border-radius: 1.5px;
  background: rgba(23, 22, 15, 0.07);
  transition: transform 260ms var(--ease), background-color 260ms var(--ease);
  position: relative;
  cursor: default;
}

.heatmap__cell[data-level="1"] { background: rgba(77, 122, 82, 0.24); }
.heatmap__cell[data-level="2"] { background: rgba(77, 122, 82, 0.43); }
.heatmap__cell[data-level="3"] { background: rgba(77, 122, 82, 0.62); }
.heatmap__cell[data-level="4"] { background: rgba(60, 100, 66, 0.82); }
.heatmap__cell[data-level="5"] { background: var(--green-deep); }

.heatmap__cell:hover { transform: scale(1.35); z-index: 2; }

.heatmap__foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2em;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--ink-38);
  font-variant-numeric: lining-nums tabular-nums;
}

.heatmap__legend {
  display: flex;
  align-items: center;
  gap: 5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.6rem;
}

.heatmap__legend i {
  width: 9px;
  height: 9px;
  border-radius: 1px;
  display: block;
}

.heatmap__tip {
  position: fixed;
  z-index: 60;
  padding: 6px 10px 7px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -135%);
  transition: opacity 180ms var(--ease);
  font-variant-numeric: lining-nums tabular-nums;
}

.heatmap__tip.is-on { opacity: 1; }

/* ================================================================
   03 — THE MACHINE (night plate)
   ================================================================ */
.night {
  background: var(--night);
  color: var(--night-ink);
  padding-block: var(--section);
  position: relative;
  overflow: hidden;
}

.night::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 46% at 82% 8%, rgba(143, 184, 148, 0.09), transparent 70%);
  pointer-events: none;
}

.night .section__head { position: relative; z-index: 1; }

.night .section__label .idx { color: var(--night-ink); }
.night .section__label .name { color: var(--night-ink-45); }
.night .section__label .line { background: var(--night-rule); }

.night__statement {
  margin-top: clamp(44px, 7vh, 82px);
  font-size: clamp(2.1rem, 6.2vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.032em;
  max-width: 19ch;
  position: relative;
  z-index: 1;
}

.night__statement em { color: var(--night-green); }

.pledges {
  margin-top: clamp(52px, 8vh, 96px);
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: 0;
  position: relative;
  z-index: 1;
}

.pledge {
  grid-column: span 3;
  padding: 1.5em 1.4em 1.6em 0;
  border-top: var(--hairline) solid var(--night-rule);
  display: flex;
  flex-direction: column;
  gap: 0.85em;
}

.pledge + .pledge { padding-left: 1.4em; border-left: var(--hairline) solid var(--night-rule); }

.pledge__n {
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--night-ink-45);
}

.pledge h3 {
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.005em;
  margin: 0;
  line-height: 1.3;
}

.pledge p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.6;
  color: var(--night-ink-70);
  max-width: 26ch;
}

.night__foot {
  margin-top: clamp(36px, 5vh, 56px);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2em;
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  color: var(--night-ink-45);
  position: relative;
  z-index: 1;
}

@media (max-width: 980px) {
  .pledge { grid-column: span 6; }
  .pledge + .pledge { padding-left: 0; border-left: 0; }
  .pledge:nth-child(even) { padding-left: 1.4em; border-left: var(--hairline) solid var(--night-rule); }
}

@media (max-width: 620px) {
  .pledge { grid-column: span 12; }
  .pledge:nth-child(even) { padding-left: 0; border-left: 0; }
}

/* ================================================================
   02 — THE SOURCES
   ================================================================ */
.marquee-group {
  margin-top: clamp(46px, 7vh, 84px);
}

/* 一条图标带：内容双份拼接，从 -50% 平移到 0 → 无缝右移。
   --chip-size / --chip-gap 由 site.js 按容器宽度计算，让单份图标恰好铺满一屏，
   同屏不会出现重复 logo。 */
.marquee {
  --chip-size: 46px;
  --chip-gap: 14px;
  margin-top: 1.15em;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent 0,
    #000 7%,
    #000 93%,
    transparent 100%
  );
  mask-image: linear-gradient(90deg, transparent 0, #000 7%, #000 93%, transparent 100%);
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: source-flow var(--flow-duration, 46s) linear infinite;
  will-change: transform;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

@keyframes source-flow {
  from { transform: translateX(-50%); }
  to { transform: translateX(0); }
}

.marquee__set {
  display: flex;
  align-items: center;
  gap: var(--chip-gap);
  padding-right: var(--chip-gap);
}

.src-chip {
  width: var(--chip-size, 46px);
  height: var(--chip-size, 46px);
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: calc(var(--chip-size, 46px) * 0.24);
  overflow: hidden;
  background: var(--tile, #111);
  box-shadow: inset 0 0 0 1px rgba(23, 22, 15, 0.08);
}

.src-chip__glyph {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.src-chip__icon {
  width: 58%;
  height: 58%;
  object-fit: contain;
  filter: brightness(0) invert(1);
  display: block;
}

/* 官方 logo 字形：源 SVG 自带留白（约 59% 画布），放大到 92% 让视觉尺寸与其它图标一致 */
.src-chip__logo {
  width: 92%;
  height: 92%;
  object-fit: contain;
  display: block;
}

.src-chip__mono {
  color: #fff;
  font-size: calc(var(--chip-size, 46px) * 0.32);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
}

/* 说明：这条流动动画不遵循 prefers-reduced-motion 的全局关闭策略。
   本站其余动效仍按设计基线随系统「减弱动态效果」关闭；
   数据源两行是页面唯一的功能性动效，关闭后该区块会退化为静止横排，
   维护者要求即使系统开启 Reduce Motion 也保留流动（2026-11-05 确认）。
   全局规则用 !important 把动画压到 0.001ms，这里按同优先级反向覆盖。 */
@media (prefers-reduced-motion: reduce) {
  .marquee .marquee__track {
    animation-duration: var(--flow-duration, 46s) !important;
    animation-iteration-count: infinite !important;
  }
}

/* ================================================================
   05 — THE INSTALL
   ================================================================ */
.install-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(40px, 6vh, 64px);
  margin-top: clamp(44px, 7vh, 80px);
  align-items: start;
}

.install-main { grid-column: 1 / span 6; }

.install-main .h2 { margin-bottom: 0.55em; }

.install-main .body-copy { margin-bottom: 2.1em; }

.install-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.4em 2em;
}

.install-spec {
  grid-column: 8 / span 5;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--t-small);
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 0.86em 0 0.9em;
  border-top: var(--hairline) solid var(--rule);
  vertical-align: baseline;
  font-weight: 400;
}

.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: var(--hairline) solid var(--rule); }

.spec-table th {
  font-size: var(--t-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-38);
  width: 42%;
}

.spec-table td { font-variant-numeric: lining-nums; }

.cmd {
  margin-top: 1.8em;
}

.cmd__label {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-38);
  margin-bottom: 0.7em;
}

.cmd__box {
  display: flex;
  align-items: center;
  gap: 1em;
  padding: 0.9em 1em;
  border: var(--hairline) solid var(--rule-strong);
  background: var(--paper-raise);
}

.cmd__box code {
  font-family: var(--serif);
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  color: var(--ink-90);
  flex: 1 1 auto;
  overflow-x: auto;
  white-space: nowrap;
}

.cmd__box button {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-52);
  padding: 0.2em 0;
  border-bottom: var(--hairline) solid var(--rule-strong);
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.cmd__box button:hover { color: var(--green-deep); border-color: var(--green); }

.install-note {
  margin-top: 1.6em;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--ink-38);
  max-width: 46ch;
}

@media (max-width: 900px) {
  .install-main { grid-column: 1 / span 12; }
  .install-spec { grid-column: 1 / span 12; }
}

/* ================================================================
   COLOPHON / FOOTER
   ================================================================ */
.colophon {
  border-top: var(--hairline) solid var(--rule-strong);
  padding-top: clamp(44px, 6vh, 72px);
  overflow: hidden;
}

.colophon__top {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(30px, 4vh, 48px);
}

.colophon__note { grid-column: 1 / span 4; }

.colophon__note p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.6;
  color: var(--ink-52);
  max-width: 30ch;
}

.colophon__note p + p { margin-top: 0.9em; }

.foot-nav { grid-column: 6 / span 3; }
.foot-nav--wide { grid-column: 9 / span 4; }

.foot-nav h4 {
  font-size: var(--t-micro);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--ink-38);
  margin: 0 0 1em;
}

.foot-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }

.foot-nav li { padding: 0.42em 0; }

.foot-nav a {
  font-size: var(--t-small);
  color: var(--ink-70);
  transition: color 220ms var(--ease);
}

.foot-nav a:hover { color: var(--ink); }

.wordmark {
  margin: clamp(46px, 7vh, 88px) 0 0;
  font-size: clamp(5.4rem, 24.5vw, 24rem);
  line-height: 0.74;
  letter-spacing: -0.045em;
  text-align: center;
  white-space: nowrap;
  color: var(--ink);
  margin-bottom: -0.12em;
  user-select: none;
}

.colophon__bottom {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1em 2em;
  padding-block: 1.5em 1.8em;
  border-top: var(--hairline) solid var(--rule);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-38);
}

.colophon__bottom .set {
  text-transform: none;
  letter-spacing: 0.02em;
  font-style: italic;
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  .colophon__note { grid-column: 1 / span 12; }
  .foot-nav { grid-column: 1 / span 6; }
  .foot-nav--wide { grid-column: 7 / span 6; }
}

/* ================================================================
   utility
   ================================================================ */
.section-divider {
  height: var(--hairline);
  background: var(--rule);
}

/* ================================================================
   HERO ENTRANCE (CSS only, so it survives without JS)
   ================================================================ */
.hero__eyebrow,
.hero__title span,
.hero__foot > * {
  animation: rise 1000ms var(--ease-out) both;
}

.hero__eyebrow { animation-delay: 60ms; }
.hero__title span:nth-child(1) { animation-delay: 160ms; }
.hero__title span:nth-child(2) { animation-delay: 250ms; }
.hero__title span:nth-child(3) { animation-delay: 340ms; }
.hero__foot > *:nth-child(1) { animation-delay: 520ms; }
.hero__foot > *:nth-child(2) { animation-delay: 600ms; }
.hero__foot > *:nth-child(3) { animation-delay: 680ms; }

@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

/* masthead small screen polish */
@media (max-width: 620px) {
  .hero { padding-top: 92px; }
  .hero__title { font-size: clamp(2.9rem, 13.6vw, 5rem); }
  .hero__title span { white-space: normal; }
  .masthead__mark { font-size: 0.8rem; letter-spacing: 0.24em; }
}

/* ================================================================
   REFINEMENTS
   ================================================================ */
.heatmap {
  --cell: clamp(12px, 1.46vw, 21px);
  --cell-gap: clamp(4px, 0.46vw, 6px);
}

.heatmap__note {
  margin: 22px 0 0;
  max-width: 44ch;
  font-size: var(--t-small);
  line-height: 1.55;
  font-style: italic;
  color: var(--ink-38);
  text-wrap: pretty;
}

/* quiet inline links in the colophon */
.foot-link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule-strong);
  color: var(--ink-90);
  transition: color 220ms var(--ease), text-decoration-color 220ms var(--ease);
}

.foot-link:hover {
  color: var(--green-deep);
  text-decoration-color: var(--green);
}

/* the masthead reads black over paper sections, ivory over the night plate */
.masthead.is-dark .masthead__mark,
.masthead.is-dark .masthead__meta { color: var(--night-ink); }

.masthead.is-dark .masthead__mark .dot { background: var(--night-green); }

.masthead.is-dark .masthead__nav a { color: var(--night-ink-45); }
.masthead.is-dark .masthead__nav a .n { color: rgba(236, 232, 221, 0.28); }
.masthead.is-dark .masthead__nav a:hover,
.masthead.is-dark .masthead__nav a.is-active { color: var(--night-ink); }

.masthead.is-dark .link { color: var(--night-ink); }

.masthead.is-dark.is-stuck {
  background: rgba(21, 20, 15, 0.88);
  border-bottom-color: var(--night-rule);
}

.masthead.is-dark.is-stuck .masthead__nav a.is-active { color: var(--night-ink); }

.anno__text { padding-left: 0; }
.anno--right .anno__text { padding-left: 0.6em; }
.anno--left .anno__text { padding-right: 0.6em; text-align: right; }

/* annotations only describe the stacked panel */
.panel-stage[data-layout="tabs"] .anno { opacity: 0 !important; }

/* two-column room index, so the window arrives sooner */
.desk-index {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(18px, 2.8vw, 44px);
  border-bottom: var(--hairline) solid var(--rule);
}

.desk-index li {
  grid-template-columns: 2.4em minmax(0, 1fr);
  padding: 0.78em 0.3em 0.82em;
  border-top: var(--hairline) solid var(--rule);
  border-bottom: 0;
}

.desk-index li:last-child { border-bottom: 0; }

.desk-index .s { font-size: 0.62rem; letter-spacing: 0.08em; }

@media (max-width: 760px) {
  .desk-index { grid-template-columns: 1fr; }
}

/* ---- colophon corrections -------------------------------------- */
.foot-nav--site { grid-column: 5 / span 2; }
.foot-nav--project { grid-column: 7 / span 2; }
.foot-nav--elsewhere { grid-column: 9 / span 4; }

@media (max-width: 900px) {
  .foot-nav--site { grid-column: 1 / span 4; }
  .foot-nav--project { grid-column: 5 / span 4; }
  .foot-nav--elsewhere { grid-column: 9 / span 4; }
}

@media (max-width: 620px) {
  .foot-nav--site,
  .foot-nav--project,
  .foot-nav--elsewhere { grid-column: 1 / span 12; }
}

.foot-link { white-space: nowrap; }

.colophon__bottom {
  position: relative;
  z-index: 2;
  background: var(--paper);
}

.wordmark {
  position: relative;
  z-index: 1;
  margin-bottom: -0.2em;
}

/* the wordmark bleeds off the page, cropped at the baseline */
.wordmark-wrap {
  height: calc(clamp(5.4rem, 24.5vw, 24rem) * 0.615);
  overflow: hidden;
  margin-top: clamp(46px, 7vh, 88px);
  margin-bottom: 0;
}

.wordmark {
  margin: 0;
  font-size: clamp(5.4rem, 24.5vw, 24rem);
  line-height: 0.78;
  letter-spacing: -0.045em;
  text-align: center;
  white-space: nowrap;
  color: var(--ink);
  user-select: none;
}

/* ---- a soft plate of colour so the glass has something to refract --- */
.panel-stage::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: 50%;
  top: 6%;
  width: min(520px, calc(100vw - 32px));
  height: 78%;
  transform: translateX(-50%);
  background:
    radial-gradient(52% 44% at 34% 26%, rgba(77, 122, 82, 0.5), rgba(77, 122, 82, 0) 70%),
    radial-gradient(46% 40% at 72% 62%, rgba(196, 158, 106, 0.42), rgba(196, 158, 106, 0) 70%),
    radial-gradient(40% 34% at 50% 92%, rgba(58, 84, 63, 0.34), rgba(58, 84, 63, 0) 72%);
  filter: blur(34px);
  opacity: 0;
  transition: opacity 520ms var(--ease);
  pointer-events: none;
}

.panel-stage[data-material="liquid"]::after { opacity: 0.85; }

/* the record heatmap must always fit its column */
.heatmap__months,
.heatmap__grid {
  grid-template-columns: repeat(26, minmax(0, 1fr));
}

.heatmap__grid { grid-template-rows: none; grid-auto-rows: 1fr; }

.heatmap__cell {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
}

@media (max-width: 620px) {
  .hero__eyebrow { flex-wrap: wrap; gap: 0.5em 1em; }
  .hero__eyebrow .bar { display: none; }
  .cta { white-space: nowrap; font-size: 1.05rem; padding: 0.58em 1em 0.62em; }
  .hero__spec { padding-top: 1em; }
  .install-actions .cta { font-size: 1rem; }
}

/* narrow screens: the settings window keeps a readable scale and pans */
.desk-window-wrap.is-pannable {
  justify-content: flex-start;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: 6px;
}

.desk-swipe {
  margin: 0 0 0.6em;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-38);
}

@media (min-width: 761px) {
  .desk-swipe { display: none; }
}

/* ================================================================
   CJK 版式微调
   ================================================================ */
.hero__title {
  line-height: 1.09;
  letter-spacing: 0.012em;
  max-width: 12em;
}

.hero__title span { letter-spacing: 0.012em; }

.hero__title .hl { letter-spacing: 0.004em; }

.hero__lede {
  max-width: 23em;
  line-height: 1.95;
  letter-spacing: 0.015em;
}

/* 章节标题：中文不需要那么极端的负字距，也不该贴太紧 */
.section__title .h2 { letter-spacing: 0.01em; }

.night__statement {
  line-height: 1.16;
  letter-spacing: 0.012em;
  max-width: 13em;
}

.night__statement .hl {
  color: var(--night-green);
  font-weight: 700;
}

.record-copy .h3 { line-height: 1.42; }

/* 索引与标签在中文下放宽字距，读起来像图注 */
.desk-index .s,
.pledge__n,
.heatmap__months span {
  letter-spacing: 0.16em;
}

.desk-index .n { letter-spacing: 0.02em; }

.spec-table th {
  letter-spacing: 0.22em;
  width: 40%;
}

.hero__spec dt { letter-spacing: 0.22em; }

.stat-list .k { letter-spacing: 0.06em; }

.colophon__bottom { letter-spacing: 0.12em; }
.colophon__bottom .set { letter-spacing: 0.03em; }

.install-note { line-height: 1.8; }

.heatmap__note { line-height: 1.8; }

.masthead__nav a { letter-spacing: 0.2em; }

.cmd__box code { letter-spacing: 0.01em; }

/* 中文注释文字比拉丁宽，收窄字号、放宽行宽，避免断成孤字 */
.anno__text {
  width: 9em;
  font-size: 0.74rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* 中文标签在大字距下更接近图注，不需要全大写 */
.hero__eyebrow .label,
.section__label .name,
.cmd__label,
.heatmap__legend,
.record-copy .label { text-transform: none; }

/* 字距过大会把 macOS 这类拉丁词拉散 */
.hero__eyebrow .label { letter-spacing: 0.18em; }

/* 中文没有真斜体：注记一律正体，用字号/颜色/字距区分层级 */
.anno__text,
.panel-hint,
.heatmap__note,
.hero__action .aside,
.colophon__bottom .set,
.figcaption,
.icon-note figcaption {
  font-style: normal;
}

.anno__text { letter-spacing: 0.06em; color: var(--ink-52); }

.panel-hint { letter-spacing: 0.05em; color: var(--ink-38); }

.heatmap__note { letter-spacing: 0.05em; color: var(--ink-38); }

.hero__action .aside { letter-spacing: 0.05em; }

.colophon__bottom .set { letter-spacing: 0.04em; }

.icon-note figcaption {
  letter-spacing: 0.06em;
  color: var(--ink-52);
  font-size: var(--t-small);
}

/* 移动端首屏眉标保留短横线，避免两段文字黏在一起 */
@media (max-width: 620px) {
  .hero__eyebrow .bar { display: block; flex: 0 0 22px; }
  .hero__lede { line-height: 1.88; }
}

/* 页脚小注：两行短句，不做字间换行 */
.colophon__note p { line-height: 1.85; }

/* ================================================================
   首屏改版：左文案 + 右仪表盘；logo 进顶栏
   ================================================================ */
.mark__icon {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  box-shadow: 0 1px 3px rgba(20, 20, 15, 0.16),
    inset 0 0 0 0.5px rgba(20, 20, 15, 0.1);
  flex: 0 0 auto;
}

.masthead__mark .mark__word {
  font-size: 0.92rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.hero { padding-top: clamp(96px, 13vh, 150px); }

.hero__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  align-items: start;
}

.hero__left {
  grid-column: 1 / span 5;
  display: flex;
  flex-direction: column;
  padding-top: 6px;
}

.hero__left .hero__eyebrow { margin-bottom: clamp(26px, 4.6vh, 54px); }

.hero__title {
  font-size: clamp(2.15rem, 5.05vw, 5.05rem);
  line-height: 1.12;
  letter-spacing: 0.012em;
  max-width: none;
}

.hero__lede {
  margin-top: clamp(30px, 4.6vh, 52px);
  max-width: 30ch;
  font-size: var(--t-body);
  line-height: 1.92;
}

.hero__action {
  margin-top: clamp(28px, 4.4vh, 46px);
  gap: 1em;
}

.hero__spec {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55em 1.6em;
  margin: clamp(28px, 5vh, 56px) 0 0;
  padding-top: 1.15em;
  border-top: var(--hairline) solid var(--rule);
}

.hero__spec div {
  display: flex;
  align-items: baseline;
  gap: 0.55em;
  justify-content: flex-start;
}

.hero__spec dt {
  font-size: var(--t-micro);
  letter-spacing: 0.22em;
  color: var(--ink-38);
}

.hero__spec dd {
  margin: 0;
  font-size: var(--t-small);
  font-variant-numeric: lining-nums tabular-nums;
}

/* ---- 右侧图版 ---- */
.hero__right {
  grid-column: 6 / span 7;
  display: flex;
  justify-content: flex-end;
}

.hero__right .panel-stage {
  grid-column: auto;
  position: relative;
  width: 100%;
  min-height: 0;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-start;
}

.panel-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

/* 玻璃材质需要一块可以折射的色雾 */
.panel-wrap::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: -8%;
  right: -8%;
  top: -3%;
  bottom: -3%;
  background:
    radial-gradient(52% 44% at 34% 24%, rgba(77, 122, 82, 0.5), rgba(77, 122, 82, 0) 70%),
    radial-gradient(46% 40% at 74% 60%, rgba(196, 158, 106, 0.42), rgba(196, 158, 106, 0) 70%),
    radial-gradient(40% 34% at 50% 92%, rgba(58, 84, 63, 0.34), rgba(58, 84, 63, 0) 72%);
  filter: blur(34px);
  opacity: 0;
  transition: opacity 520ms var(--ease);
  pointer-events: none;
}

.panel-wrap[data-material="liquid"]::before { opacity: 0.85; }

/* 注释器相对面板定位，指向面板左缘 */
.panel-wrap .anno { right: calc(100% + 22px); }

.panel-wrap[data-layout="tabs"] .anno { opacity: 0 !important; }

/* 控制条跟在面板下方 */
.panel-wrap .panel-controls {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 20px 26px;
  width: 100%;
  margin-top: 20px;
  padding-top: 16px;
  border-top: var(--hairline) solid var(--rule);
}

.panel-wrap .control-group { gap: 0.5em; }

/* ---- 01 段：卡片解剖 ---- */
.anatomy {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(32px, 5vh, 56px);
  align-items: start;
  margin-top: clamp(40px, 6vh, 72px);
}

.anatomy__copy { grid-column: 1 / span 4; }

.anatomy__copy .body-copy { max-width: 31em; }

.anatomy__copy .panel-hint { margin-top: 1.6em; }

.card-list {
  grid-column: 6 / span 7;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  border-bottom: var(--hairline) solid var(--rule);
}

.card-list li {
  display: grid;
  grid-template-columns: 2.8em minmax(0, 1fr);
  column-gap: 1.1em;
  padding: 1.15em 0.4em 1.25em;
  border-top: var(--hairline) solid var(--rule);
  transition: background-color 340ms var(--ease), padding-left 340ms var(--ease);
}

.card-list li:hover {
  background: var(--green-wash);
  padding-left: 0.9em;
}

.card-list .i {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  color: var(--ink-24);
  font-variant-numeric: lining-nums tabular-nums;
}

.card-list .n {
  font-size: clamp(1.06rem, 1.5vw, 1.36rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0 0 0.4em;
  line-height: 1.3;
}

.card-list p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.82;
  letter-spacing: 0.04em;
  color: var(--ink-52);
  max-width: 44em;
}

/* ---- 响应式 ---- */
@media (max-width: 1100px) {
  .hero__left { grid-column: 1 / span 12; }
  .hero__right {
    grid-column: 1 / span 12;
    justify-content: flex-start;
    margin-top: clamp(34px, 5vh, 56px);
  }
  .hero__title { font-size: clamp(2.4rem, 8.4vw, 6rem); }
  .hero__lede { max-width: 34ch; }
  .hero__right .panel-stage { align-items: flex-start; }
  .panel-wrap .anno { display: none; }
}

@media (max-width: 980px) {
  .anatomy__copy { grid-column: 1 / span 12; }
  .card-list { grid-column: 1 / span 12; }
}

@media (max-width: 620px) {
  .hero__action { flex-direction: column; align-items: flex-start; }
  .hero__spec { gap: 0.5em 1.2em; }
  .panel-wrap .panel-controls { gap: 16px 20px; }
}

/* 首屏的注释不再依赖滚动揭示：它一进页面就在 */
.panel-wrap .anno {
  opacity: 1;
  transition: opacity 420ms var(--ease);
}

.panel-wrap[data-layout="tabs"] .anno { opacity: 0 !important; }

.hero__lede { max-width: 33ch; }

/* 面板容器定宽，避免 shrink-to-fit 把 zoom 卷进循环 */
.panel-wrap {
  width: 440px;
  max-width: 100%;
}

/* 左侧文案随滚动钉住，等右侧长面板走完 */
.hero__left {
  position: sticky;
  top: 96px;
  align-self: start;
}

@media (max-width: 1100px) {
  .hero__left { position: static; }
}

.card-list p { max-width: none; }

/* ================================================================
   首屏收紧：面板贴到标题右侧，注记移到面板右边
   ================================================================ */
.hero__grid {
  display: flex;
  align-items: flex-start;
  gap: clamp(30px, 3.8vw, 62px);
}

.hero__left {
  flex: 1 1 auto;
  max-width: 36em;
  min-width: 0;
}

.hero__right {
  flex: 0 0 612px;
  display: flex;
  justify-content: flex-start;
}

.hero__right .panel-stage {
  width: 440px;
  flex: 0 0 440px;
  align-items: flex-start;
}

/* 注记落在面板右侧 */
.panel-wrap .anno {
  left: calc(100% + 22px);
  right: auto;
}

.panel-wrap .anno__line { order: 0; }

.panel-wrap .anno__text {
  width: 8em;
  padding-left: 0.6em;
  padding-right: 0;
  text-align: left;
}

.hero__title { font-size: clamp(2.2rem, 5.35vw, 5.4rem); }

@media (max-width: 1240px) {
  .hero__right { flex: 0 0 440px; }
  .panel-wrap .anno { display: none; }
}

@media (max-width: 1100px) {
  .hero__grid { display: block; }
  .hero__left { max-width: none; }
  .hero__right { margin-top: clamp(34px, 5vh, 56px); }
  .hero__right .panel-stage { width: 100%; flex: 1 1 auto; }
}

/* 与全站左边距对齐：整组从左边距起排，多余留白留给右侧 */

/* ================================================================
   三皮肤牌堆
   ================================================================ */
.deck-host {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
}

.deck {
  position: relative;
  width: 776px;
  height: 1004px;
  transform-origin: top left;
  flex: 0 0 auto;
}

.deck__item {
  position: absolute;
  left: calc(var(--i) * 168px);
  top: calc(var(--i) * 26px);
  z-index: calc(3 - var(--i));
}

.deck__item .bruce-panel { width: 440px; }

/* 后两块面板只露出一条竖切片，给它们一点分层投影 */
.deck__item::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  pointer-events: none;
}

.hero__grid {
  justify-content: space-between;
  align-items: flex-start;
}

.hero__left {
  flex: 0 1 440px;
  min-width: 300px;
}

.hero__right {
  flex: 0 1 776px;
  min-width: 0;
  display: flex;
  justify-content: flex-start;
}

.hero__right .panel-controls {
  flex-direction: row;
  align-items: flex-start;
  gap: 22px 26px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: var(--hairline) solid var(--rule);
  width: 100%;
}

.hero__right .panel-controls .panel-hint { flex: 1 1 260px; }

@media (max-width: 1100px) {
  .hero__right { flex: 1 1 auto; width: 100%; }
  .deck { position: static; width: 440px; height: auto !important; }
  .deck__item { position: static; display: none; }
  .deck__item[data-theme="classic"] { display: block; }
}

/* 牌堆：后一块露出左缘（标题 + 大数字），最右是默认经典 */
.deck__item {
  top: calc(var(--i) * 42px);
  z-index: calc(var(--i) + 1);
}

.deck { margin-bottom: 0; }

/* 章节内的说明文字不该被全局的 34ch 限制压成窄条 */
.anatomy__copy .panel-hint { max-width: 40em; }

/* 标题占栏宽 430/440，留一点余量避免字体差异导致溢出 */
.hero__title { font-size: clamp(2.2rem, 5.15vw, 5.2rem); }

/* ----------------------------------------------------------------
   双平台下载
   ================================================================ */
.hero__dl {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero__dl .cta {
  font-size: clamp(0.92rem, 1.1vw, 1.02rem);
  padding: 0.6em 1.05em 0.64em;
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.dl-card {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  padding: 1.2em 1.25em 1.05em;
  border: var(--hairline) solid var(--rule-strong);
  transition: background-color 360ms var(--ease), border-color 360ms var(--ease), color 360ms var(--ease);
}

.dl-card:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.dl-card__os {
  font-size: var(--t-lede);
  letter-spacing: -0.01em;
}

.dl-card__file {
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--ink-38);
  word-break: break-all;
}

.dl-card__meta {
  font-size: var(--t-small);
  line-height: 1.55;
  color: var(--ink-52);
}

.dl-card__go {
  margin-top: auto;
  padding-top: 1em;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1em;
  border-top: var(--hairline) solid var(--rule);
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  color: var(--ink-70);
}

.dl-card:hover .dl-card__file,
.dl-card:hover .dl-card__meta,
.dl-card:hover .dl-card__go { color: var(--paper); }

.dl-card:hover .dl-card__go { border-top-color: rgba(241, 239, 233, 0.32); }

.dl-card:hover .cta__arrow { transform: translateX(4px); }

.install-alt {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1.8em;
  margin-top: 1.35em;
  font-size: var(--t-small);
}

@media (max-width: 620px) {
  .dl-grid { grid-template-columns: minmax(0, 1fr); }
  .hero__dl { width: 100%; }
  .hero__dl .cta { flex: 1 1 auto; justify-content: space-between; }
}

/* 规格四行排成 2×2：长值（Win 10/11、x64）不再把第四项挤到单独一行 */
.hero__spec {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55em 1.4em;
}

.hero__spec div { justify-content: flex-start; }

@media (max-width: 620px) {
  .hero__spec { grid-template-columns: minmax(0, 1fr); }
}

/* ================================================================
   IA v2 —— 看板 / 数据源 / 账目 / 出口保护 / 用量分析 / 页脚
   ================================================================ */

/* ---------------------------------------------------------------- 02 数据源：本机 */
.local-notes {
  margin-top: clamp(44px, 6vh, 76px);
}

.local-notes__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: var(--gap);
}

.local-notes__list li {
  padding: 1.2em 1.4em 1.3em 0;
  border-top: var(--hairline) solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 0.7em;
}

.local-notes__list li + li {
  padding-left: 1.4em;
  border-left: var(--hairline) solid var(--rule);
}

.local-notes__list .i {
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--ink-38);
  font-variant-numeric: lining-nums tabular-nums;
}

.local-notes__list h3 {
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.005em;
  margin: 0;
  line-height: 1.35;
}

.local-notes__list p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.7;
  color: var(--ink-52);
  max-width: 30ch;
}

.local-notes__list em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--ink-70);
  letter-spacing: 0.01em;
}

@media (max-width: 980px) {
  .local-notes__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .local-notes__list li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .local-notes__list li:nth-child(even) {
    padding-left: 1.4em;
    border-left: var(--hairline) solid var(--rule);
  }
}

@media (max-width: 620px) {
  .local-notes__list { grid-template-columns: minmax(0, 1fr); }
  .local-notes__list li:nth-child(even) { padding-left: 0; border-left: 0; }
}

/* ---------------------------------------------------------------- 04 出口保护 */
.egress-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(40px, 6vh, 64px);
  margin-top: clamp(46px, 7vh, 84px);
  align-items: start;
  position: relative;
  z-index: 1;
}

.egress-copy {
  grid-column: 1 / span 4;
  display: flex;
  flex-direction: column;
  gap: 1.15em;
}

.egress-lede {
  margin: 0;
  font-size: var(--t-lede);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--night-ink);
  max-width: 24em;
}

.egress-copy .body-copy {
  color: var(--night-ink-70);
  font-size: var(--t-small);
  line-height: 1.85;
  max-width: 30ch;
}

.egress-rules {
  list-style: none;
  margin: 0.8em 0 0;
  padding: 0;
  border-top: var(--hairline) solid var(--night-rule);
}

.egress-rules li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.2em;
  padding: 0.85em 0;
  border-bottom: var(--hairline) solid var(--night-rule);
  font-size: var(--t-small);
  color: var(--night-ink-70);
}

.egress-rules li span {
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  color: var(--night-ink-45);
  white-space: nowrap;
}

.egress-flow {
  grid-column: 6 / span 7;
  margin: 0;
  border: var(--hairline) solid var(--night-rule);
  border-radius: 3px;
  background: rgba(236, 232, 221, 0.025);
  padding: clamp(16px, 2.2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 1.5em;
}

.egress-flow__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.2em;
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  color: var(--night-ink-45);
}

.egress-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.egress-steps li {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 1em;
  padding: 1em 0;
  border-top: var(--hairline) solid var(--night-rule);
}

.egress-steps li:first-child {
  border-top: 0;
  padding-top: 0.15em;
}

.egress-step__n {
  font-size: var(--t-micro);
  letter-spacing: 0.12em;
  color: var(--night-ink-45);
  padding-top: 0.3em;
  font-variant-numeric: lining-nums tabular-nums;
}

.egress-steps h3 {
  margin: 0 0 0.35em;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--night-ink);
}

.egress-steps p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.7;
  color: var(--night-ink-70);
  max-width: 46ch;
}

.egress-steps code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--night-green);
  background: rgba(143, 184, 148, 0.12);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  letter-spacing: 0.01em;
}

.egress-outcomes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 18px);
}

.egress-out {
  display: flex;
  align-items: flex-start;
  gap: 0.85em;
  padding: 0.95em 1em 1em;
  border: var(--hairline) solid var(--night-rule);
  border-radius: 3px;
}

.egress-out--ok {
  border-color: rgba(143, 184, 148, 0.42);
  background: rgba(143, 184, 148, 0.07);
}

.egress-out--block {
  border-color: rgba(212, 168, 67, 0.44);
  background: rgba(212, 168, 67, 0.08);
}

.egress-out__badge {
  font-size: 1.05rem;
  line-height: 1.4;
}

.egress-out b {
  display: block;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  color: var(--night-ink);
  margin-bottom: 0.3em;
}

.egress-out p {
  margin: 0;
  font-size: var(--t-micro);
  line-height: 1.7;
  color: var(--night-ink-70);
  max-width: 24ch;
}

.egress-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 18px);
  border-top: var(--hairline) solid var(--night-rule);
  padding-top: 1.1em;
}

.egress-cards span {
  display: block;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  color: var(--night-ink-45);
  margin-bottom: 0.5em;
}

.egress-cards p {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.65;
  color: var(--night-ink-70);
  max-width: 26ch;
}

.egress-note {
  border-top: var(--hairline) solid var(--night-rule);
  padding-top: 1em;
  font-size: var(--t-micro);
  line-height: 1.75;
  letter-spacing: 0.03em;
  color: var(--night-ink-45);
  max-width: 62ch;
}

@media (max-width: 980px) {
  .egress-copy { grid-column: 1 / span 12; }
  .egress-flow { grid-column: 1 / span 12; }
}

@media (max-width: 620px) {
  .egress-outcomes { grid-template-columns: minmax(0, 1fr); }
  .egress-cards { grid-template-columns: minmax(0, 1fr); gap: 1.1em; }
  .night .night__foot { flex-direction: column; gap: 0.6em; }
}

/* ---------------------------------------------------------------- 05 用量分析 */
.analysis-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: clamp(38px, 6vh, 64px);
  margin-top: clamp(46px, 7vh, 88px);
  align-items: start;
}

.analysis-copy { grid-column: 1 / span 4; }

.analysis-copy .h3 { margin-bottom: 1.1em; }

.analysis-copy .body-copy { font-size: var(--t-small); }

.analysis-copy .panel-hint { margin-top: 1.6em; }

.analysis-points {
  list-style: none;
  margin: 2.2em 0 0;
  padding: 0;
}

.analysis-points li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.2em;
  padding: 1.02em 0 1.06em;
  border-top: var(--hairline) solid var(--rule);
}

.analysis-points li:last-child { border-bottom: var(--hairline) solid var(--rule); }

.analysis-points .k {
  font-size: var(--t-small);
  color: var(--ink-52);
}

.analysis-points .v {
  font-size: clamp(1.2rem, 1.8vw, 1.6rem);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.analysis-figure {
  grid-column: 6 / span 7;
  border-top: var(--hairline) solid var(--rule-strong);
  border-bottom: var(--hairline) solid var(--rule);
  padding: clamp(18px, 2.6vw, 30px) 0;
}

.analysis-figure__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.2em;
  flex-wrap: wrap;
}

.analysis-seg {
  display: flex;
  border: var(--hairline) solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}

.analysis-seg span {
  font-size: var(--t-micro);
  letter-spacing: 0.08em;
  padding: 0.5em 0.72em;
  color: var(--ink-38);
  border-right: var(--hairline) solid var(--rule);
  white-space: nowrap;
}

.analysis-seg span:last-child { border-right: 0; }

.analysis-seg .is-on {
  background: var(--ink);
  color: var(--paper);
}

.analysis-figure__meta {
  font-size: var(--t-micro);
  letter-spacing: 0.06em;
  color: var(--ink-38);
  font-variant-numeric: lining-nums tabular-nums;
}

.analysis-chart {
  display: block;
  width: 100%;
  height: clamp(132px, 17vw, 184px);
  margin-top: clamp(16px, 2.4vw, 26px);
  overflow: visible;
}

.analysis-chart .area { fill: rgba(77, 122, 82, 0.13); }
.analysis-chart .line {
  fill: none;
  stroke: var(--green);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.analysis-chart__axis {
  display: flex;
  justify-content: space-between;
  margin-top: 0.55em;
  font-size: var(--t-micro);
  letter-spacing: 0.06em;
  color: var(--ink-38);
  font-variant-numeric: lining-nums tabular-nums;
}

.analysis-rows {
  margin-top: clamp(18px, 2.6vw, 26px);
  display: flex;
  flex-direction: column;
}

.analysis-row {
  display: grid;
  grid-template-columns: 8em minmax(0, 1fr) 3.6em;
  align-items: center;
  gap: 1em;
  padding: 0.66em 0;
  border-top: var(--hairline) solid var(--rule);
  font-size: var(--t-small);
}

.analysis-row:last-child { border-bottom: var(--hairline) solid var(--rule); }

.analysis-row .k { color: var(--ink-52); }

.analysis-row .bar {
  display: block;
  height: 4px;
  background: var(--paper-deep);
  position: relative;
}

.analysis-row .bar i {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--green);
}

.analysis-row .v {
  text-align: right;
  font-size: var(--t-micro);
  letter-spacing: 0.04em;
  color: var(--ink-70);
  font-variant-numeric: lining-nums tabular-nums;
}

.analysis-figure__foot {
  display: flex;
  justify-content: space-between;
  gap: 1.2em;
  margin-top: 1.2em;
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  color: var(--ink-38);
}

@media (max-width: 980px) {
  .analysis-copy { grid-column: 1 / span 12; }
  .analysis-figure { grid-column: 1 / span 12; }
}

/* ---------------------------------------------------------------- 页脚：下载与验证 */
.colophon__download {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: 1.7em;
  padding-bottom: clamp(30px, 4vh, 48px);
  margin-bottom: clamp(30px, 4vh, 48px);
  border-bottom: var(--hairline) solid var(--rule-strong);
}

.colophon__download-copy { grid-column: 1 / span 4; }

.colophon__download-copy .label { margin-bottom: 1.1em; }

.colophon__download-note {
  margin: 0;
  font-size: var(--t-small);
  line-height: 1.7;
  color: var(--ink-52);
  max-width: 32ch;
}

.colophon__download-lines {
  grid-column: 6 / span 7;
  display: flex;
  flex-direction: column;
}

.dl-line {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr) auto 1.2em;
  align-items: baseline;
  gap: 1em;
  padding: 0.95em 0 1em;
  border-top: var(--hairline) solid var(--rule);
  color: var(--ink);
}

.dl-line:last-child { border-bottom: var(--hairline) solid var(--rule); }

.dl-line__os {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-38);
}

.dl-line__file {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: -0.01em;
}

.dl-line__meta {
  font-size: var(--t-micro);
  color: var(--ink-38);
  white-space: nowrap;
  font-variant-numeric: lining-nums tabular-nums;
}

.dl-line__go {
  justify-self: end;
  font-size: 1rem;
  transition: transform 220ms var(--ease);
}

.dl-line:hover .dl-line__file { color: var(--green-deep); }
.dl-line:hover .dl-line__go { transform: translateX(4px); }

.colophon__download-foot {
  grid-column: 1 / span 12;
  display: flex;
  justify-content: space-between;
  gap: 0.6em 2em;
  flex-wrap: wrap;
  font-size: var(--t-micro);
  letter-spacing: 0.06em;
  color: var(--ink-38);
}

.colophon__download-foot a { color: var(--ink-52); }

.colophon__download-foot a:hover { color: var(--ink); }

@media (max-width: 900px) {
  .colophon__download-copy { grid-column: 1 / span 12; }
  .colophon__download-lines { grid-column: 1 / span 12; }
}

@media (max-width: 620px) {
  .dl-line { grid-template-columns: 4.6em minmax(0, 1fr) 1.2em; }
  .dl-line__meta { display: none; }
}

/* 五章导航的响应式修正（覆盖旧的六项规则） */
@media (max-width: 860px) {
  .masthead__nav a:nth-child(3) { display: block; }
  .masthead__nav a:nth-child(4),
  .masthead__nav a:nth-child(5) { display: none; }
}

/* 移动端：本机/出口保护正文不再按 ch 限宽，避免窄栏断行 */
@media (max-width: 620px) {
  .egress-copy .body-copy,
  .local-notes__list p,
  .egress-out p,
  .egress-cards p { max-width: none; }
}

/* 出口列本身已按栅格限宽，正文不再二次收窄 */
.egress-copy .body-copy { max-width: none; }

/* ================================================================
   01 看板：纵向 tab + 单卡预览
   ================================================================ */
.anatomy__copy { grid-row: 1; }

.anatomy__tabs {
  grid-column: 1 / span 4;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  border-bottom: var(--hairline) solid var(--rule);
}

.anatomy-tab {
  -webkit-appearance: none;
  appearance: none;
  background: none;
  border: 0;
  border-top: var(--hairline) solid var(--rule);
  font: inherit;
  color: inherit;
  text-align: left;
  display: grid;
  grid-template-columns: 2.8em minmax(0, 1fr);
  column-gap: 1.1em;
  padding: 1.05em 0.9em 1.15em;
  cursor: pointer;
  transition: background-color 340ms var(--ease);
}

.anatomy-tab:hover { background: var(--green-wash); }

.anatomy-tab.is-current {
  background: var(--green-wash);
  box-shadow: inset 2px 0 0 var(--green);
}

.anatomy-tab .i {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  color: var(--ink-24);
  font-variant-numeric: lining-nums tabular-nums;
  padding-top: 0.25em;
}

.anatomy-tab__body { display: block; min-width: 0; }

.anatomy-tab .n {
  display: block;
  font-size: clamp(1.06rem, 1.5vw, 1.36rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0 0 0.4em;
  line-height: 1.3;
}

.anatomy-tab .d {
  display: block;
  font-size: var(--t-small);
  line-height: 1.82;
  letter-spacing: 0.04em;
  color: var(--ink-52);
}

.anatomy-tab.is-current .n,
.anatomy-tab.is-current .i { color: var(--green-deep); }

.anatomy-tab:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -2px;
}

.anatomy__stage {
  grid-column: 6 / span 7;
  grid-row: 1 / span 2;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.anatomy__panelbox {
  position: relative;
  width: 440px;
  max-width: 100%;
  transition: height 260ms var(--ease), width 260ms var(--ease);
}

.anatomy__panelbox .bruce-panel { transform-origin: top left; }

@media (max-width: 980px) {
  .anatomy__copy { grid-row: auto; }
  .anatomy__tabs { grid-column: 1 / span 12; grid-row: auto; }
  .anatomy__stage {
    grid-column: 1 / span 12;
    grid-row: auto;
    margin-top: clamp(12px, 2vh, 22px);
  }
}

/* 液态玻璃卡背后铺一层柔光，让玻璃有东西可以折射（与首屏牌堆同源） */
.anatomy__stage { position: relative; isolation: isolate; }

.anatomy__stage::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: 50%;
  top: 4%;
  width: min(520px, 100%);
  height: 82%;
  transform: translateX(-50%);
  background:
    radial-gradient(52% 44% at 34% 26%, rgba(77, 122, 82, 0.5), rgba(77, 122, 82, 0) 70%),
    radial-gradient(46% 40% at 72% 62%, rgba(196, 158, 106, 0.42), rgba(196, 158, 106, 0) 70%),
    radial-gradient(40% 34% at 50% 92%, rgba(58, 84, 63, 0.34), rgba(58, 84, 63, 0) 72%);
  filter: blur(34px);
  opacity: 0;
  transition: opacity 420ms var(--ease);
  pointer-events: none;
}

.anatomy__stage[data-material="liquid"]::before { opacity: 0.85; }

.anatomy__panelbox { z-index: 1; }

/* 章节标题：一律单行展示（2026-11-05 调整） */
.section__title .h2 { white-space: nowrap; }
.night__statement { white-space: nowrap; max-width: none; }

@media (max-width: 440px) {
  .section__title .h2 { font-size: clamp(1.5rem, 5.6vw, 1.65rem); }
  .night__statement { font-size: clamp(1.6rem, 7.2vw, 2.1rem); }
}

/* ================================================================
   章节头：B 版式（标签行在上、标题单行在下）
   字体沿用现有宋体 / Times，只改标题区块排布，其它区域不动
   ================================================================ */
.section__head { display: block; }

.section__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.9em;
  margin: 0;
  font-size: var(--t-micro);
  letter-spacing: 0.2em;
  color: var(--ink-38);
}

.section__eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  flex: 0 0 auto;
}

.section__eyebrow .idx { color: var(--ink); }
.section__eyebrow .name { color: var(--ink-38); }

.section__head .section__title { margin-top: clamp(18px, 2.8vh, 30px); }

.section__head .section__title .h2,
.section__head .section__title .night__statement { margin: 0; }

.section__kicker { margin: 1.2em 0 0; }

.section__eyebrow--night { color: var(--night-ink-45); }
.section__eyebrow--night .dot { background: var(--night-green); }
.section__eyebrow--night .idx { color: var(--night-ink); }
.section__eyebrow--night .name { color: var(--night-ink-45); }

/* 首屏下载按钮：平台图标 + Windows coming soon */
.hero__dl { align-items: flex-start; }

.cta__icon {
  width: 1.08em;
  height: 1.08em;
  flex: 0 0 auto;
  fill: currentColor;
}

.cta-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5em;
}

.cta-note {
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  color: var(--ink-38);
  padding-left: 0.25em;
}

button.cta {
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
}

.cta--disabled,
.cta:disabled {
  color: var(--ink-38);
  border-color: var(--ink-24);
  background: transparent;
  cursor: not-allowed;
}

.cta--disabled:hover,
.cta:disabled:hover {
  background: transparent;
  color: var(--ink-38);
}

/* 页脚下载行：Windows 尚未发布 */
.dl-line--soon {
  color: var(--ink-38);
  cursor: not-allowed;
}

.dl-line--soon .dl-line__file {
  font-family: var(--serif);
  font-size: var(--t-small);
  letter-spacing: 0.02em;
}

/* 窄屏下载按钮：macOS 与 Windows 等宽（含 coming soon 的纵向栈） */
@media (max-width: 620px) {
  .hero__dl .cta-stack { flex: 1 1 auto; }
  .hero__dl .cta-stack .cta { width: 100%; justify-content: flex-start; }
  .hero__dl .cta-stack .cta-note { padding-left: 0; }
}