:root {
  color-scheme: light;
  --paper: #f2f2ee;
  --paper-raised: #f8f8f5;
  --paper-deep: #e9e9e4;
  --ink: #0b0c0f;
  --ink-soft: #3d3d42;
  --muted: #77777d;
  --line: rgba(11, 12, 15, 0.16);
  --line-strong: rgba(11, 12, 15, 0.28);
  --purple: #e56576;
  --purple-dark: #b83d50;
  --purple-soft: rgba(229, 101, 118, 0.1);
  --sprout-green: #2f9448;
  --sprout-green-dark: #176f34;
  --sprout-green-soft: rgba(47, 148, 72, 0.12);
  --shadow-soft: 0 22px 60px rgba(30, 24, 49, 0.14);
  --shadow-deep: 0 38px 90px rgba(24, 18, 43, 0.2);
  --control-radius: 10px;
  --panel-radius: 16px;
  --media-radius: 18px;
  --content: 1540px;
  --gutter: clamp(20px, 4.2vw, 72px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  content: "";
  background-image: linear-gradient(rgba(11, 12, 15, 0.018) 1px, transparent 1px);
  background-size: 100% 4px;
  opacity: 0.22;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  font: inherit;
}

button {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

figure,
p,
h1,
h2,
h3,
dl,
dd {
  margin: 0;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--purple);
  color: var(--paper-raised);
}

:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: -80px;
  left: 20px;
  padding: 12px 16px;
  border: 1px solid var(--ink);
  border-radius: var(--control-radius);
  background: var(--paper-raised);
  color: var(--ink);
  font-size: 13px;
  font-weight: 750;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 18px;
}

.header-sentinel {
  position: absolute;
  top: 18px;
  width: 1px;
  height: 1px;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, height 0.3s var(--ease);
}

.site-header.is-scrolled {
  height: 66px;
  border-color: var(--line);
  background: rgba(242, 242, 238, 0.9);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  backdrop-filter: blur(18px) saturate(120%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand > span {
  display: grid;
  gap: 2px;
}

.brand strong {
  font-size: 14px;
  letter-spacing: -0.01em;
}

.brand small {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 2.5vw, 42px);
}

.site-nav a {
  position: relative;
  padding: 26px 0 24px;
  color: var(--ink-soft);
  font-size: 12px;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 2px;
  background: var(--purple);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-cta {
  justify-self: end;
  padding: 11px 16px;
  border: 1px solid var(--ink);
  border-radius: var(--control-radius);
  color: var(--ink);
  font-size: 11px;
  font-weight: 750;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), background 0.25s ease, color 0.25s ease;
}

.header-cta:hover {
  background: var(--ink);
  color: var(--paper-raised);
  transform: translateY(-2px);
}

.header-cta:active,
.button:active,
.showcase-tabs button:active {
  transform: translateY(1px) scale(0.99);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: max(100dvh, 790px);
  padding: 96px var(--gutter) 0;
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 73% 51%, rgba(229, 101, 118, 0.055), transparent 32%),
    var(--paper);
}

.hero-copy {
  position: relative;
  z-index: 12;
  max-width: 470px;
  padding-top: clamp(34px, 5.2vw, 80px);
}

.hero-kicker,
.section-kicker {
  margin-bottom: 22px;
  color: var(--purple);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.15em;
}

.hero h1 {
  font-size: clamp(66px, 7vw, 108px);
  font-weight: 850;
  letter-spacing: -0.06em;
  line-height: 1.02;
  white-space: nowrap;
}

.hero h1 .hero-brand-word {
  color: var(--sprout-green);
}

.hero-intro {
  max-width: 390px;
  margin-top: 30px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.hero-actions {
  margin-top: 30px;
  display: grid;
  justify-items: start;
  gap: 14px;
}

.platform-downloads,
.download-platform-list {
  width: min(100%, 330px);
  display: grid;
  gap: 9px;
}

.platform-download {
  position: relative;
  min-height: 60px;
  padding: 9px 13px;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: center;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  background: rgba(248, 248, 245, 0.88);
  box-shadow: 0 12px 30px rgba(28, 23, 44, 0.08);
  transition: transform 0.35s var(--ease), border-color 0.3s ease, box-shadow 0.35s var(--ease);
}

.platform-download::after {
  position: absolute;
  inset: -70% auto -70% -45%;
  width: 34%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.48), transparent);
  content: "";
  pointer-events: none;
  transform: skewX(-18deg);
  transition: left 0.75s var(--ease);
}

.platform-download > span:last-child {
  min-width: 0;
  display: grid;
  gap: 3px;
}

.platform-download strong {
  font-size: 11px;
  font-weight: 820;
  letter-spacing: -0.01em;
}

.platform-download small {
  color: inherit;
  font-size: 8px;
  letter-spacing: 0.05em;
  opacity: 0.62;
}

.platform-badge {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 10px;
  font-size: 8px;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.platform-download-windows {
  border-color: var(--ink);
  background:
    radial-gradient(circle at 9% 50%, rgba(47, 148, 72, 0.28), transparent 24%),
    linear-gradient(110deg, #0b0c0f, #24222e);
  color: var(--paper-raised);
}

.platform-download-windows:hover,
.platform-download-windows:focus-visible {
  border-color: rgba(229, 101, 118, 0.72);
  box-shadow: 0 17px 38px rgba(32, 24, 62, 0.2);
  transform: translateY(-3px);
}

.platform-download-windows:hover::after,
.platform-download-windows:focus-visible::after {
  left: 118%;
}

.platform-download-android {
  border-color: rgba(47, 148, 72, 0.38);
  background:
    radial-gradient(circle at 90% 18%, rgba(47, 148, 72, 0.19), transparent 36%),
    linear-gradient(115deg, rgba(255, 255, 255, 0.96), rgba(234, 243, 232, 0.9));
  color: var(--ink);
}

.platform-download-android .platform-badge {
  border-color: rgba(47, 148, 72, 0.5);
  background: rgba(47, 148, 72, 0.08);
  color: var(--sprout-green);
  letter-spacing: 0;
}

.platform-download-android:hover,
.platform-download-android:focus-visible {
  border-color: var(--sprout-green);
  box-shadow: 0 17px 38px rgba(30, 91, 45, 0.15);
  transform: translateY(-3px);
}

.platform-download-android:hover::after,
.platform-download-android:focus-visible::after {
  left: 118%;
}

.platform-download-mac {
  border-color: rgba(11, 12, 15, 0.14);
  background:
    radial-gradient(circle at 92% 18%, var(--purple-soft), transparent 34%),
    rgba(248, 248, 245, 0.72);
  color: var(--ink-soft);
}

.platform-download-mac .platform-badge {
  color: var(--purple);
}

.platform-download-mac:hover,
.platform-download-mac:focus-visible {
  border-color: rgba(229, 101, 118, 0.72);
  box-shadow: 0 17px 38px rgba(91, 43, 53, 0.13);
  transform: translateY(-3px);
}

.platform-download-mac:hover::after,
.platform-download-mac:focus-visible::after {
  left: 118%;
}

.platform-download.is-pending {
  box-shadow: none;
  cursor: default;
}

/* Two 2:1 download controls with a visible 6px diagonal gap. */
.download-split {
  position: relative;
  isolation: isolate;
  container-type: inline-size;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  column-gap: 6px;
  min-width: 0;
  min-height: 60px;
  border: 0;
  border-radius: 13px;
}

.download-split--windows { border-color: var(--ink); --netdisk-fill: #ecd8dc; --netdisk-hover: #e3c4cb; --netdisk-ink: #5e2430; }
.download-split--android { border-color: rgba(47, 148, 72, 0.38); --netdisk-fill: #176f34; --netdisk-hover: #115727; --netdisk-ink: #f8f8f5; }
.download-split--macos { border-color: rgba(11, 12, 15, 0.14); --netdisk-fill: #dfd9ea; --netdisk-hover: #d2c8e0; --netdisk-ink: #352b45; }

.download-split > .platform-download {
  width: calc(100% + 9px);
  min-width: 0;
  border: 0;
  border-radius: 12px 0 0 12px;
  padding: 9px 21px 9px 12px;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 9px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 18px) 100%, 0 100%);
  box-shadow: none;
  transform: none;
}

.download-split .platform-badge { width: 30px; height: 30px; border-radius: 8px; }
.download-split .platform-download strong { font-size: 12px; line-height: 1.4; }
.download-split .platform-download small { font-size: 10px; letter-spacing: 0; opacity: 0.8; line-height: 1.4; }
.download-split > .platform-download:hover { filter: brightness(1.06); }

.netdisk-download {
  width: calc(100% + 9px);
  margin-left: -9px;
  min-width: 0;
  min-height: 60px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 4px;
  padding: 9px 7px 9px 19px;
  border: 0;
  border-radius: 0 12px 12px 0;
  background: var(--netdisk-fill);
  color: var(--netdisk-ink);
  font-family: inherit;
  cursor: pointer;
  clip-path: polygon(18px 0, 100% 0, 100% 100%, 0 100%);
  transition: background-color 0.18s ease;
}

.netdisk-download strong { font-size: 12px; line-height: 1.4; font-weight: 750; white-space: nowrap; }
.netdisk-download small { font-size: 10px; line-height: 1.4; white-space: nowrap; }
.netdisk-download:hover { background: var(--netdisk-hover); }
.netdisk-download:active { filter: brightness(0.94); }
.netdisk-download[aria-busy="true"] { cursor: progress; }
.download-split:focus-within { outline: 2px solid var(--purple-dark); outline-offset: 3px; }
.download-split > :focus-visible { outline: 2px solid currentColor; outline-offset: -5px; }

@container (max-width: 300px) {
  .download-split > .platform-download { grid-template-columns: minmax(0, 1fr); padding-left: 10px; padding-right: 17px; }
  .download-split .platform-badge { display: none; }
}

.download-copy-status {
  position: fixed;
  z-index: 100;
  right: 20px;
  bottom: max(20px, env(safe-area-inset-bottom));
  max-width: min(380px, calc(100vw - 40px));
  padding: 12px 18px;
  border-radius: var(--control-radius);
  background: var(--ink);
  color: var(--paper-raised);
  font-size: 14px;
  line-height: 1.5;
  box-shadow: var(--shadow-soft);
}
.download-copy-status:empty { display: none; }
.netdisk-copy-dialog {
  width: min(480px, calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  overflow: auto;
  padding: 24px;
  border: 1px solid var(--line-strong);
  border-radius: var(--panel-radius);
  background: var(--paper-raised);
  color: var(--ink);
}
.netdisk-copy-dialog::backdrop { background: rgba(11, 12, 15, 0.45); }
.netdisk-copy-dialog h2 { font-size: 20px; margin: 0 0 12px; }
.netdisk-copy-dialog p { font-size: 14px; line-height: 1.6; margin: 0 0 16px; }
.netdisk-copy-dialog textarea { display: block; width: 100%; resize: vertical; min-height: 132px; padding: 12px; border: 1px solid var(--line-strong); border-radius: var(--control-radius); font: 14px/1.6 var(--font); color: var(--ink); background: var(--paper); }
.netdisk-copy-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; }
.netdisk-copy-actions button, .netdisk-copy-actions a { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--control-radius); font: 14px var(--font); color: var(--ink); background: var(--paper); cursor: pointer; }
.netdisk-copy-actions :focus-visible, .netdisk-copy-dialog textarea:focus-visible { outline: 2px solid var(--purple-dark); outline-offset: 2px; }

.button {
  min-height: 50px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--control-radius);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  transition: transform 0.3s var(--ease), background 0.25s ease, border-color 0.25s ease;
}

.button-primary {
  border-color: var(--purple);
  background: var(--purple);
  color: var(--paper-raised);
}

.button-primary:hover {
  border-color: var(--purple-dark);
  background: var(--purple-dark);
  transform: translateY(-2px);
}

.text-link {
  position: relative;
  padding: 10px 0;
  color: var(--ink);
  font-size: 11px;
  font-weight: 750;
}

.text-link::after {
  position: absolute;
  right: 0;
  bottom: 5px;
  left: 0;
  height: 1px;
  background: var(--ink);
  content: "";
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.text-link:hover::after {
  transform: scaleX(0.45);
}

.spatial-map {
  position: absolute;
  z-index: 2;
  right: 1.5%;
  bottom: 5.5%;
  width: min(76vw, 1450px);
  aspect-ratio: 1000 / 700;
  perspective: 1500px;
}

.spatial-map__scene {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform: perspective(1500px) rotateX(var(--scene-rx, 0deg)) rotateY(var(--scene-ry, 0deg));
  transition: transform 0.5s var(--ease);
}

.map-lines {
  position: absolute;
  inset: 2% 0 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform: translateZ(-40px);
}

.map-lines path {
  fill: none;
  stroke: rgba(229, 101, 118, 0.64);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  vector-effect: non-scaling-stroke;
  animation: line-draw 1.15s var(--ease) forwards;
}

.map-lines path:nth-child(2) {
  animation-delay: 0.08s;
}

.map-lines path:nth-child(3) {
  animation-delay: 0.14s;
}

.map-lines path:nth-child(4) {
  animation-delay: 0.2s;
}

.map-lines path:nth-child(5) {
  animation-delay: 0.26s;
}

.map-lines path:nth-child(6) {
  animation-delay: 0.32s;
}

.spatial-card {
  position: absolute;
  z-index: var(--layer, 1);
  width: var(--width);
  outline-offset: 8px;
}

.spatial-card__plane {
  display: block;
  transform-style: preserve-3d;
  transform:
    perspective(1200px)
    translateZ(var(--depth, 0px))
    rotateX(var(--rx, 0deg))
    rotateY(var(--ry, 0deg))
    rotateZ(var(--rz, 0deg));
  transform-origin: center;
  opacity: var(--card-opacity, 1);
  filter: var(--card-filter, none);
  transition: transform 0.62s var(--ease), filter 0.45s ease, opacity 0.45s ease;
  will-change: transform;
}

.spatial-card__image {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid rgba(11, 12, 15, 0.24);
  border-radius: var(--media-radius);
  background: #181a1a;
  box-shadow: var(--shadow-soft);
  aspect-ratio: var(--shot-ratio, 16 / 10);
  clip-path: inset(0 round var(--media-radius));
}

.spatial-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--shot-position, center);
  transition: transform 0.65s var(--ease), filter 0.45s ease;
}

.spatial-card__meta {
  margin-top: 9px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink);
  opacity: var(--meta-opacity, 0.58);
  transform: translate3d(0, -2px, 18px);
  transition: opacity 0.35s ease, transform 0.45s var(--ease);
}

.spatial-card__meta strong {
  font-size: 10px;
  font-weight: 800;
}

.spatial-card__meta small {
  color: var(--muted);
  font-size: 8px;
  text-align: right;
}

.spatial-card:hover {
  z-index: 20;
}

.spatial-card:hover .spatial-card__plane,
.spatial-card:focus-visible .spatial-card__plane {
  transform: perspective(1200px) translate3d(0, -10px, var(--hover-z, 100px)) rotateX(0deg) rotateY(0deg) rotateZ(0deg) scale(var(--hover-scale, 1.06));
  opacity: 1;
  filter: saturate(1.04);
}

.spatial-card:hover .spatial-card__image img,
.spatial-card:focus-visible .spatial-card__image img {
  transform: scale(1.012);
}

.spatial-card:hover .spatial-card__meta,
.spatial-card:focus-visible .spatial-card__meta {
  opacity: 1;
  transform: translate3d(0, 1px, 34px);
}

.spatial-card-home {
  top: 27%;
  left: 27%;
  --width: 52%;
  --layer: 10;
  --depth: 124px;
  --rx: 2deg;
  --ry: -13deg;
  --rz: -2.5deg;
  --meta-opacity: 0.92;
  --hover-scale: 1.035;
  --hover-z: 150px;
}

.spatial-card-plan {
  top: 5%;
  left: 79%;
  --width: 18%;
  --layer: 1;
  --depth: -190px;
  --rx: -5deg;
  --ry: -16deg;
  --rz: -5deg;
  --card-opacity: 0.76;
  --card-filter: blur(0.75px) saturate(0.58) brightness(0.72);
  --shot-ratio: 4 / 3;
  --hover-scale: 1.34;
  --hover-z: 80px;
  --meta-opacity: 0.34;
}

.spatial-card-knowledge {
  top: 5%;
  left: 12%;
  --width: 22%;
  --layer: 3;
  --depth: -116px;
  --rx: 6deg;
  --ry: 15deg;
  --rz: 5deg;
  --card-opacity: 0.8;
  --card-filter: blur(0.35px) saturate(0.72) brightness(0.8);
  --shot-ratio: 5 / 4;
  --shot-position: left center;
  --hover-scale: 1.25;
  --hover-z: 104px;
  --meta-opacity: 0.48;
}

.spatial-card-interview {
  top: 36%;
  left: 76%;
  --width: 24%;
  --layer: 5;
  --depth: 20px;
  --rx: -10deg;
  --ry: -28deg;
  --rz: 8deg;
  --card-opacity: 0.9;
  --shot-ratio: 16 / 10;
  --hover-scale: 1.12;
  --hover-z: 124px;
  --meta-opacity: 0.58;
}

.spatial-card-aptitude {
  top: 64%;
  left: -14%;
  --width: 34%;
  --layer: 4;
  --depth: -12px;
  --rx: 7deg;
  --ry: 24deg;
  --rz: -11deg;
  --card-opacity: 0.9;
  --card-filter: saturate(0.88);
  --shot-ratio: 3 / 2;
  --hover-scale: 1.1;
  --hover-z: 132px;
  --meta-opacity: 0.58;
}

.spatial-card-material {
  top: 78%;
  left: 20%;
  --width: 19%;
  --layer: 2;
  --depth: -164px;
  --rx: -10deg;
  --ry: -18deg;
  --rz: 8deg;
  --card-opacity: 0.78;
  --card-filter: blur(0.7px) saturate(0.6) brightness(0.74);
  --shot-ratio: 4 / 3;
  --shot-position: center 18%;
  --hover-scale: 1.38;
  --hover-z: 96px;
  --meta-opacity: 0.32;
}

.spatial-card-report {
  top: 68%;
  left: 76%;
  --width: 22%;
  --layer: 4;
  --depth: -28px;
  --rx: 6deg;
  --ry: 20deg;
  --rz: -8deg;
  --card-opacity: 0.82;
  --shot-ratio: 5 / 4;
  --shot-position: center top;
  --hover-scale: 1.16;
  --hover-z: 112px;
  --meta-opacity: 0.44;
}

.memory-section,
.plan-section,
.teaching-section,
.more-section,
.download-section {
  padding: clamp(110px, 12vw, 190px) var(--gutter);
  border-bottom: 1px solid var(--line);
}

.section-heading,
.plan-copy {
  max-width: 920px;
}

.section-heading h2,
.plan-copy h2,
.download-copy h2 {
  font-size: clamp(48px, 6.2vw, 94px);
  font-weight: 830;
  letter-spacing: -0.075em;
  line-height: 1.02;
}

.section-heading > p:last-child,
.plan-copy > p:last-child {
  max-width: 590px;
  margin-top: 28px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.9;
}

.memory-section {
  overflow: hidden;
  background: var(--paper-raised);
}

.memory-stage {
  position: relative;
  min-height: clamp(560px, 58vw, 850px);
  margin-top: clamp(66px, 9vw, 130px);
  perspective: 1600px;
  transform-style: preserve-3d;
}

.depth-screen {
  position: absolute;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--media-radius);
  background: #181a1a;
  box-shadow: var(--shadow-deep);
  transform-style: preserve-3d;
  transition: transform 0.65s var(--ease);
}

.depth-screen img {
  width: 100%;
  height: auto;
}

.depth-screen-main {
  z-index: 3;
  top: 14%;
  left: 8%;
  width: 70%;
  transform: perspective(1500px) rotateX(3deg) rotateY(-9deg) rotateZ(-1.2deg) translateZ(80px);
}

.depth-screen-back {
  z-index: 1;
  top: 1%;
  right: -3%;
  width: 53%;
  opacity: 0.72;
  transform: perspective(1500px) rotateX(1deg) rotateY(-14deg) rotateZ(3deg) translateZ(-30px);
}

.memory-stage:hover .depth-screen-main {
  transform: perspective(1500px) rotateX(1deg) rotateY(-5deg) rotateZ(-0.4deg) translate3d(0, -8px, 110px);
}

.memory-stage:hover .depth-screen-back {
  transform: perspective(1500px) rotateX(0deg) rotateY(-9deg) rotateZ(2deg) translate3d(8px, 0, -5px);
}

.depth-note {
  position: absolute;
  z-index: 5;
  bottom: 8%;
  left: 5%;
  min-width: 126px;
  padding: 9px 12px 9px 10px;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 9px;
  align-items: center;
  border: 1px solid rgba(11, 12, 15, 0.18);
  border-radius: 12px;
  background: rgba(248, 248, 245, 0.9);
  color: var(--ink);
  box-shadow: 0 13px 34px rgba(21, 17, 36, 0.13);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.depth-note small {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--purple);
  color: var(--paper-raised);
  font-size: 8px;
  font-weight: 850;
}

.depth-note strong {
  font-size: 10px;
  font-weight: 800;
}

.depth-note-right {
  right: 4%;
  bottom: 19%;
  left: auto;
}

.evidence-list {
  position: relative;
  z-index: 8;
  isolation: isolate;
  margin-top: clamp(100px, 11vw, 170px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(32px, 6vw, 110px);
  overflow: visible;
}

.evidence-list div {
  position: relative;
  min-width: 0;
}

.evidence-list dt {
  max-width: 11em;
  font-size: clamp(22px, 2.25vw, 34px);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1.18;
  transition: color 0.28s ease, transform 0.36s var(--ease);
}

.evidence-list div:hover dt {
  color: #d95a6b;
  transform: translateX(8px);
}

.plan-section {
  background: var(--paper);
}

.plan-copy {
  margin-left: 8vw;
}

.plan-composition {
  position: relative;
  min-height: clamp(620px, 58vw, 860px);
  margin-top: clamp(70px, 9vw, 132px);
  perspective: 1600px;
}

.paper-screen {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--media-radius);
  background: #181a1a;
  box-shadow: var(--shadow-deep);
}

.paper-screen img {
  width: 100%;
  height: auto;
}

.plan-screen {
  position: absolute;
  top: 2%;
  left: 2%;
  width: 78%;
  transform: perspective(1500px) rotateX(2deg) rotateY(-7deg) rotateZ(-1.5deg);
  transform-origin: left center;
  transition: transform 0.65s var(--ease);
}

.plan-composition:hover .plan-screen {
  transform: perspective(1500px) rotateX(0deg) rotateY(-3deg) rotateZ(-0.5deg) translate3d(0, -8px, 60px);
}

.plan-facts {
  position: absolute;
  z-index: 4;
  right: 2%;
  bottom: 6%;
  width: min(440px, 38%);
  aspect-ratio: 1;
  transform: translateZ(90px);
}

.plan-facts::before {
  position: absolute;
  inset: 12%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(229, 101, 118, 0.12), transparent 68%);
  content: "";
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.38s ease, transform 0.52s var(--ease);
}

.plan-facts.is-open::before {
  opacity: 1;
  transform: scale(1);
}

.plan-facts__fan {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.plan-ring-segment {
  --ring-fill: #f4ccd4;
  --ring-ink: var(--ink);
  opacity: 0;
  pointer-events: none;
  transform: rotate(-18deg) scale(0.74);
  transform-box: view-box;
  transform-origin: 200px 180px;
  transition: opacity 0.24s ease, transform 0.5s var(--ease);
}

.plan-ring-segment path {
  fill: none;
  stroke: var(--ring-fill);
  stroke-width: 52;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 12px 18px rgba(30, 24, 28, 0.12));
  transition: stroke-dashoffset 0.56s var(--ease), filter 0.32s ease;
}

.plan-ring-segment text {
  fill: var(--ring-ink);
  font-family: inherit;
  font-size: 14px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-anchor: middle;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.plan-ring-segment:nth-of-type(1) {
  --ring-fill: #17171b;
  --ring-ink: #fff8f8;
}

.plan-ring-segment:nth-of-type(2) {
  --ring-fill: #efb9c3;
}

.plan-ring-segment:nth-of-type(3) {
  --ring-fill: #f9dfe4;
}

.plan-facts.is-open .plan-ring-segment {
  opacity: 1;
  pointer-events: auto;
  transform: rotate(0) scale(1);
}

.plan-facts.is-open .plan-ring-segment path {
  stroke-dashoffset: 0;
}

.plan-facts.is-open .plan-ring-segment text {
  opacity: 1;
}

.plan-facts.is-open .plan-ring-segment:nth-of-type(1),
.plan-facts.is-open .plan-ring-segment:nth-of-type(1) path,
.plan-facts.is-open .plan-ring-segment:nth-of-type(1) text { transition-delay: 0.02s; }

.plan-facts.is-open .plan-ring-segment:nth-of-type(2),
.plan-facts.is-open .plan-ring-segment:nth-of-type(2) path,
.plan-facts.is-open .plan-ring-segment:nth-of-type(2) text { transition-delay: 0.11s; }

.plan-facts.is-open .plan-ring-segment:nth-of-type(3),
.plan-facts.is-open .plan-ring-segment:nth-of-type(3) path,
.plan-facts.is-open .plan-ring-segment:nth-of-type(3) text { transition-delay: 0.2s; }

.plan-facts.is-open .plan-ring-segment:hover path {
  filter: drop-shadow(0 16px 24px rgba(30, 24, 28, 0.2));
}

.plan-facts__hub {
  position: absolute;
  z-index: 5;
  top: calc(50% - 57px);
  left: calc(50% - 57px);
  width: 114px;
  height: 114px;
  padding: 0;
  display: grid;
  place-content: center;
  gap: 5px;
  border: 1px solid rgba(11, 12, 15, 0.48);
  border-radius: 50%;
  background: rgba(255, 255, 252, 0.96);
  color: var(--ink);
  box-shadow: 0 14px 30px rgba(30, 24, 28, 0.16);
  text-align: center;
  cursor: pointer;
  transition: transform 0.42s var(--ease), box-shadow 0.42s var(--ease);
}

.plan-facts__hub::before {
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(11, 12, 15, 0.12);
  border-radius: 50%;
  content: "";
  opacity: 0.74;
  transition: transform 0.42s var(--ease), opacity 0.32s ease;
}

.plan-facts__hub small {
  font-size: 7px;
  letter-spacing: 0.12em;
  opacity: 0.72;
}

.plan-facts__hub strong {
  font-size: 13px;
  letter-spacing: 0.02em;
}

.plan-facts__hub:hover,
.plan-facts__hub:focus-visible,
.plan-facts.is-open .plan-facts__hub {
  box-shadow: 0 18px 36px rgba(30, 24, 28, 0.22), 0 0 0 7px rgba(229, 101, 118, 0.1);
  transform: scale(1.045);
}

.plan-facts.is-open .plan-facts__hub::before {
  opacity: 0.45;
  transform: rotate(45deg) scale(0.9);
}

.teaching-section {
  background: var(--paper-raised);
}

.product-showcase {
  margin-top: clamp(70px, 9vw, 130px);
  border-top: 1px solid var(--ink);
}

.showcase-tabs {
  --indicator-x: 8px;
  --indicator-y: 8px;
  --indicator-width: calc((100% - 40px) / 4);
  --indicator-height: 58px;
  position: relative;
  isolation: isolate;
  padding: 8px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  border: 0;
  border-radius: 0;
  background: transparent;
  counter-reset: showcase-tab;
}

.showcase-tabs::before,
.showcase-tabs::after {
  position: absolute;
  z-index: 0;
  top: 0;
  left: 0;
  width: var(--indicator-width);
  height: var(--indicator-height);
  border-radius: 11px;
  content: "";
  pointer-events: none;
  transform: translate3d(var(--indicator-x), var(--indicator-y), 0);
  transition: width 0.42s var(--ease), height 0.42s var(--ease), transform 0.42s var(--ease);
}

.showcase-tabs::before {
  background: linear-gradient(120deg, var(--purple-dark), var(--purple) 62%, #f18a98);
  box-shadow: 0 14px 34px rgba(229, 101, 118, 0.22);
}

.showcase-tabs::after {
  background:
    radial-gradient(circle at 18% 35%, rgba(255, 255, 255, 0.72) 0 1px, transparent 2px),
    radial-gradient(circle at 72% 68%, rgba(255, 255, 255, 0.46) 0 1px, transparent 2px),
    linear-gradient(108deg, transparent 18%, rgba(255, 255, 255, 0.34) 48%, transparent 72%);
  background-position: 0 0, 0 0, 140% 0;
  background-size: 34px 34px, 46px 46px, 220% 100%;
  opacity: 0.68;
  animation: tab-aurora 5.2s linear infinite;
}

.showcase-tabs button {
  position: relative;
  z-index: 1;
  min-height: 58px;
  padding: 0 18px 0 52px;
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-align: left;
  cursor: pointer;
  counter-increment: showcase-tab;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.35s var(--ease), transform 0.3s var(--ease);
}

.showcase-tabs button::before {
  position: absolute;
  top: 50%;
  left: 16px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(229, 101, 118, 0.18);
  border-radius: 8px;
  background: var(--paper-raised);
  color: var(--purple);
  content: "0" counter(showcase-tab);
  font-size: 8px;
  font-weight: 850;
  transform: translateY(-50%);
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.showcase-tabs button:hover {
  color: var(--paper-raised);
  border-color: transparent;
  background: transparent;
  transform: none;
}

.showcase-tabs button[aria-selected="true"],
.showcase-tabs button.is-indicator-target {
  border-color: transparent;
  background: transparent;
  color: var(--paper-raised);
  box-shadow: none;
}

.showcase-tabs button[aria-selected="true"]::before,
.showcase-tabs button.is-indicator-target::before {
  border-color: rgba(248, 248, 245, 0.24);
  background: rgba(248, 248, 245, 0.16);
  color: var(--paper-raised);
}

.showcase-panel {
  min-height: 650px;
  padding: clamp(50px, 6vw, 94px) 0;
  display: grid;
  grid-template-columns: minmax(260px, 0.52fr) minmax(620px, 1.48fr);
  gap: clamp(44px, 6vw, 104px);
  align-items: center;
}

.showcase-copy > p {
  margin-bottom: 18px;
  color: var(--purple);
  font-size: 10px;
  font-weight: 800;
}

.showcase-copy h3 {
  font-size: clamp(34px, 3.6vw, 56px);
  font-weight: 820;
  letter-spacing: -0.06em;
  line-height: 1.12;
}

.showcase-copy > span {
  display: block;
  max-width: 410px;
  margin-top: 24px;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.9;
}

.showcase-screen {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--media-radius);
  background: #181a1a;
  box-shadow: var(--shadow-deep);
  transform: perspective(1400px) rotateX(2deg) rotateY(-6deg) rotateZ(1deg);
  transform-origin: center right;
  transition: transform 0.6s var(--ease);
}

.showcase-screen:hover {
  transform: perspective(1400px) rotateX(0deg) rotateY(-2deg) rotateZ(0deg) translate3d(0, -7px, 54px) scale(1.018);
}

.showcase-screen img {
  width: 100%;
  height: auto;
}

.more-section {
  overflow: hidden;
  background: var(--paper);
}

.essay-gallery {
  position: relative;
  min-height: clamp(650px, 64vw, 980px);
  margin-top: clamp(70px, 9vw, 132px);
  perspective: 1600px;
  transform-style: preserve-3d;
}

.essay-shot {
  position: absolute;
  min-width: 0;
  transform-style: preserve-3d;
}

.essay-shot-material {
  z-index: 3;
  top: 2%;
  left: 3%;
  width: 59%;
}

.essay-shot-report {
  z-index: 4;
  right: 1%;
  bottom: 2%;
  width: 58%;
}

.essay-shot__plane {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--media-radius);
  background: var(--paper-raised);
  box-shadow: var(--shadow-deep);
  transition: transform 0.65s var(--ease);
}

.essay-shot-material .essay-shot__plane {
  transform: perspective(1400px) rotateX(2deg) rotateY(8deg) rotateZ(-2deg) translateZ(10px);
}

.essay-shot-report .essay-shot__plane {
  transform: perspective(1400px) rotateX(-1deg) rotateY(-8deg) rotateZ(2deg) translateZ(70px);
}

.essay-shot:hover {
  z-index: 10;
}

.essay-shot:hover .essay-shot__plane {
  transform: perspective(1400px) rotateX(0deg) rotateY(0deg) rotateZ(0deg) translate3d(0, -10px, 110px) scale(1.025);
}

.essay-shot__plane img {
  width: 100%;
  height: auto;
}

.essay-shot figcaption {
  margin-top: 18px;
  display: grid;
  gap: 5px;
}

.essay-shot figcaption strong {
  font-size: 13px;
}

.essay-shot figcaption span {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
}

.system-principles {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.system-principles p {
  position: relative;
  min-height: 174px;
  padding: 23px;
  display: grid;
  align-content: start;
  gap: 12px;
  overflow: hidden;
  border: 1px solid rgba(11, 12, 15, 0.14);
  border-radius: 16px;
  background:
    radial-gradient(circle at 95% 8%, rgba(229, 101, 118, 0.09), transparent 38%),
    rgba(248, 248, 245, 0.76);
  transition: transform 0.4s var(--ease), border-color 0.3s ease, box-shadow 0.4s var(--ease);
}

.system-principles p::after {
  position: absolute;
  inset: -55% auto -55% -38%;
  width: 30%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.62), transparent);
  content: "";
  pointer-events: none;
  transform: skewX(-18deg);
  transition: left 0.72s var(--ease);
}

.system-principles p:first-child {
  border-color: var(--ink);
  background:
    radial-gradient(circle at 90% 10%, rgba(229, 101, 118, 0.3), transparent 36%),
    var(--ink);
  color: var(--paper-raised);
}

.system-principles p:nth-child(2) {
  border-color: rgba(42, 32, 67, 0.72);
  background: linear-gradient(145deg, #292431, #4a3577);
  color: var(--paper-raised);
}

.system-principles p:nth-child(3) {
  border-color: rgba(229, 101, 118, 0.2);
  background: linear-gradient(145deg, #beb4dc, #ddd7ec);
  color: #211b2f;
}

.system-principles p:nth-child(4) {
  background: linear-gradient(145deg, #ece9f2, var(--paper-raised));
}

.system-principles p:hover {
  border-color: rgba(229, 101, 118, 0.36);
  box-shadow: 0 20px 44px rgba(28, 23, 44, 0.11);
  transform: translateY(-5px);
}

.system-principles p:hover::after {
  left: 118%;
}

.system-principles small {
  color: var(--purple);
  font-size: 7px;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.system-principles p:first-child small {
  color: #d7cdfb;
}

.system-principles p:nth-child(2) small {
  color: #c9b8ff;
}

.system-principles p:nth-child(3) small {
  color: var(--purple-dark);
}

.system-principles strong {
  margin-top: 9px;
  font-size: 16px;
}

.system-principles span {
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.8;
}

.system-principles p:first-child span {
  color: rgba(248, 248, 245, 0.62);
}

.system-principles p:nth-child(2) span {
  color: rgba(248, 248, 245, 0.7);
}

.system-principles p:nth-child(3) span {
  color: rgba(33, 27, 47, 0.68);
}

.download-section {
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(480px, 1.15fr) minmax(360px, 0.85fr);
  gap: clamp(42px, 8vw, 130px);
  align-items: center;
  background:
    radial-gradient(circle at 18% 58%, rgba(229, 101, 118, 0.1), transparent 28%),
    var(--paper-raised);
}

.download-copy h2 {
  max-width: 860px;
}

.download-panel {
  padding: clamp(28px, 3vw, 44px);
  border: 1px solid var(--ink);
  border-radius: var(--panel-radius);
  background: rgba(248, 248, 245, 0.9);
  box-shadow: 18px 18px 0 var(--purple-soft);
}

.download-meta {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 15px 22px;
  align-items: baseline;
}

.download-meta span {
  color: var(--muted);
  font-size: 10px;
}

.download-meta strong {
  font-size: 13px;
}

.download-platform-list {
  width: 100%;
  margin-top: 30px;
}

.checksum-link {
  width: max-content;
  margin: 18px auto 0;
  display: block;
  color: var(--ink-soft);
  font-size: 10px;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 4px;
}

.download-note {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
  line-height: 1.75;
}

.model-guidance {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.model-guidance strong {
  display: block;
  margin-bottom: 5px;
  color: var(--sprout-green-dark);
  font-size: 13px;
}

.hero-actions .model-guidance {
  width: min(100%, 330px);
  margin-top: 0;
  background: var(--paper);
}

.site-footer {
  min-height: 150px;
  padding: 38px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 48px;
  align-items: center;
  background: var(--paper);
  color: var(--muted);
  font-size: 10px;
}
.legal-nav { display:flex; flex-wrap:wrap; justify-content:center; gap:10px 18px; }
.legal-nav a { color:inherit; text-underline-offset:4px; }

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.showcase-panel.is-entering .showcase-copy,
.showcase-panel.is-entering .showcase-screen {
  animation: panel-in 0.55s var(--ease) both;
}

.showcase-panel.is-entering .showcase-screen {
  animation-delay: 0.05s;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes line-draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes tab-aurora {
  from {
    background-position: 0 0, 0 0, 140% 0;
  }
  to {
    background-position: 34px 0, -46px 0, -120% 0;
  }
}

@media (max-width: 1240px) {
  .hero {
    min-height: max(100dvh, 760px);
  }

  .hero h1 {
    font-size: clamp(64px, 7.4vw, 90px);
  }

  .showcase-panel {
    grid-template-columns: minmax(230px, 0.48fr) minmax(520px, 1.52fr);
  }
}

@media (max-width: 980px) {
  .site-header {
    height: 68px;
    grid-template-columns: 1fr auto;
  }

  .site-header .brand small {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 68px;
    right: 12px;
    left: 12px;
    padding: 12px 18px 18px;
    display: grid;
    gap: 0;
    border: 1px solid var(--line-strong);
    border-radius: var(--panel-radius);
    background: rgba(248, 248, 245, 0.98);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.3s var(--ease);
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav a {
    padding: 16px 2px;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
  }

  .site-nav a::after {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    width: 42px;
    height: 42px;
    padding: 0;
    display: grid;
    place-content: center;
    gap: 6px;
    border: 0;
    border-radius: var(--control-radius);
    background: transparent;
    cursor: pointer;
  }

  .nav-toggle span {
    width: 21px;
    height: 1px;
    display: block;
    background: var(--ink);
    transition: transform 0.3s var(--ease);
  }

  .nav-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .hero {
    min-height: auto;
    padding-top: 116px;
    padding-bottom: 70px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-copy {
    max-width: 720px;
    padding-top: 0;
  }

  .hero h1 {
    font-size: clamp(64px, 12vw, 98px);
    line-height: 1;
  }

  .spatial-map {
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
    justify-self: center;
    aspect-ratio: 1000 / 700;
  }

  .plan-copy {
    margin-left: 0;
  }

  .showcase-panel {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .showcase-copy > span {
    max-width: 620px;
  }

  .showcase-screen {
    transform: perspective(1400px) rotateX(2deg) rotateY(-3deg) rotateZ(0.6deg);
  }

  .download-section {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .download-panel {
    max-width: 620px;
  }
}

@media (max-width: 680px) {
  .hero {
    padding-top: 104px;
    gap: 38px;
  }

  .hero h1 {
    font-size: clamp(58px, 18vw, 82px);
    letter-spacing: -0.06em;
    line-height: 1;
  }

  .hero-intro {
    font-size: 14px;
  }

  .hero-actions {
    align-items: stretch;
    display: grid;
  }

  .platform-downloads,
  .download-platform-list {
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .text-link {
    width: max-content;
  }

  .spatial-map {
    width: calc(100% + 22px);
    margin-left: -11px;
    aspect-ratio: 4 / 5.3;
  }

  .spatial-map::before {
    display: none;
  }

  .spatial-map__scene {
    transform: none !important;
  }

  .map-lines {
    display: none;
  }

  .spatial-card {
    position: absolute;
  }

  .spatial-card__plane {
    transform:
      perspective(900px)
      translateZ(var(--depth, 0px))
      rotateX(calc(var(--rx, 0deg) * 0.55))
      rotateY(calc(var(--ry, 0deg) * 0.55))
      rotateZ(calc(var(--rz, 0deg) * 0.55));
  }

  .spatial-card__meta {
    margin-top: 6px;
  }

  .spatial-card__meta small {
    display: none;
  }

  .spatial-card-home {
    top: 28%;
    left: 11%;
    --width: 61%;
  }

  .spatial-card-plan {
    top: 2%;
    left: 56%;
    --width: 41%;
  }

  .spatial-card-knowledge {
    top: 4%;
    left: 0;
    --width: 42%;
  }

  .spatial-card-interview {
    top: 49%;
    left: 58%;
    --width: 41%;
  }

  .spatial-card-aptitude {
    top: 58%;
    left: 0;
    --width: 43%;
  }

  .spatial-card-material {
    top: 75%;
    left: 28%;
    --width: 42%;
  }

  .spatial-card-report {
    top: 78%;
    left: 62%;
    --width: 37%;
  }

  .memory-section,
  .plan-section,
  .teaching-section,
  .more-section,
  .download-section {
    padding-top: 88px;
    padding-bottom: 88px;
  }

  .section-heading h2,
  .plan-copy h2,
  .download-copy h2 {
    font-size: clamp(42px, 12vw, 58px);
    line-height: 1.08;
  }

  .section-heading > p:last-child,
  .plan-copy > p:last-child {
    font-size: 12px;
  }

  .memory-stage {
    min-height: 430px;
    margin-top: 54px;
  }

  .depth-screen-main {
    top: 16%;
    left: 0;
    width: 86%;
    transform: perspective(900px) rotateX(2deg) rotateY(-5deg) rotateZ(-1deg) translateZ(40px);
  }

  .depth-screen-back {
    top: 0;
    right: -20%;
    width: 71%;
    transform: perspective(900px) rotateX(1deg) rotateY(-7deg) rotateZ(2deg) translateZ(-20px);
  }

  .depth-note {
    bottom: 8%;
    left: 0;
  }

  .depth-note-right {
    right: 0;
    bottom: 17%;
    left: auto;
  }

  .evidence-list {
    grid-template-columns: 1fr;
    gap: 22px;
    margin-top: 78px;
  }

  .evidence-list div,
  .evidence-list div + div {
    min-height: 0;
    padding: 0;
    border-left: 0;
  }

  .evidence-list div + div {
    border-top: 0;
  }

  .evidence-list dt {
    max-width: none;
    font-size: 28px;
  }

  .plan-composition {
    min-height: 520px;
    margin-top: 54px;
  }

  .plan-screen {
    top: 0;
    left: 0;
    width: 94%;
    transform: perspective(900px) rotateX(1deg) rotateY(-4deg) rotateZ(-1deg);
  }

  .plan-facts {
    right: -6%;
    bottom: 0;
    width: min(390px, 104%);
  }

  .plan-facts__hub {
    top: calc(50% - 45px);
    left: calc(50% - 45px);
    width: 90px;
    height: 90px;
  }

  .plan-facts__hub small {
    font-size: 6px;
  }

  .plan-facts__hub strong {
    font-size: 10px;
  }

  .product-showcase {
    margin-top: 54px;
  }

  .showcase-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .showcase-tabs button {
    min-height: 50px;
    font-size: 11px;
  }

  .showcase-panel {
    padding: 40px 0 10px;
    gap: 34px;
  }

  .showcase-copy h3 {
    font-size: 34px;
  }

  .showcase-screen {
    transform: perspective(900px) rotateX(1deg) rotateY(-2deg) rotateZ(0.5deg);
  }

  .essay-gallery {
    min-height: 660px;
    margin-top: 54px;
  }

  .essay-shot-material {
    top: 0;
    left: 0;
    width: 88%;
  }

  .essay-shot-report {
    right: 0;
    bottom: 0;
    width: 88%;
  }

  .essay-shot-material .essay-shot__plane {
    transform: perspective(900px) rotateY(4deg) rotateZ(-1deg);
  }

  .essay-shot-report .essay-shot__plane {
    transform: perspective(900px) rotateY(-4deg) rotateZ(1deg) translateZ(30px);
  }

  .system-principles {
    margin-top: 60px;
    grid-template-columns: 1fr 1fr;
  }

  .system-principles p {
    min-height: 154px;
    padding: 19px;
  }

  .download-meta {
    grid-template-columns: 82px 1fr;
  }

  .download-panel {
    box-shadow: 10px 10px 0 var(--purple-soft);
  }

  .site-footer {
    padding-top: 34px;
    padding-bottom: 34px;
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .spatial-map__scene,
  .spatial-card__plane,
  .depth-screen,
  .plan-screen,
  .showcase-screen,
  .essay-shot__plane {
    transition: none !important;
  }
}

/* iPadOS uses the same split layout with an App Store link. */
.download-split--ipados { --netdisk-fill: #dfd9ea; --netdisk-hover: #d2c8e0; --netdisk-ink: #352b45; }
.app-store-download { text-decoration: none; }
.download-split--macos > .platform-download,
.download-split--ipados > .platform-download { background-color: #f8f8f5; }