:root {
  --ink: #102822;
  --ink-2: #25433c;
  --muted: #6b7c76;
  --line: #dce6e2;
  --paper: #ffffff;
  --canvas: #f4f7f5;
  --green: #176b5b;
  --green-dark: #103f37;
  --lime: #d9ff62;
  --lime-soft: #efffc2;
  --blue: #4f72ff;
  --blue-soft: #eef1ff;
  --sand: #f3e9d3;
  --shadow: 0 28px 80px rgba(16, 40, 34, .12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
small { font-weight: 500; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: 18px;
  top: -80px;
  z-index: 200;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  transition: top .2s ease;
}
.skip-link:focus { top: 18px; }
.skip-link small { display: block; font-size: 10px; opacity: .7; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(220, 230, 226, .82);
  backdrop-filter: blur(18px);
}
.nav-shell {
  width: min(1280px, calc(100% - 40px));
  height: 78px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 270px;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--green-dark);
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 24px rgba(16, 63, 55, .18);
}
.brand-mark::before {
  content: "";
  position: absolute;
  width: 32px;
  height: 32px;
  border: 7px solid #fff;
  border-radius: 50%;
  left: 11px;
  top: 8px;
}
.brand-mark i {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  right: 7px;
  top: 7px;
  z-index: 2;
}
.brand-mark b {
  position: absolute;
  width: 20px;
  height: 8px;
  background: var(--green-dark);
  right: -3px;
  bottom: 9px;
  transform: rotate(-18deg);
  z-index: 2;
}
.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: 18px; letter-spacing: -.02em; }
.brand-copy strong em { color: var(--green); font-style: normal; }
.brand-copy small { color: var(--muted); font-size: 9px; margin-top: 4px; }
.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 5px;
}
.site-nav a {
  min-width: 92px;
  padding: 8px 12px;
  border-radius: 12px;
  text-align: center;
  transition: background .2s ease, color .2s ease;
}
.site-nav a:hover, .site-nav a.active { background: var(--canvas); color: var(--green); }
.site-nav span { display: block; font-size: 12px; font-weight: 720; }
.site-nav small { display: block; margin-top: -1px; color: var(--muted); font-size: 8px; }
.nav-cta {
  border: 1px solid var(--ink);
  border-radius: 13px;
  min-width: 104px;
  padding: 8px 15px;
  text-align: center;
  transition: .2s ease;
}
.nav-cta:hover { background: var(--ink); color: #fff; }
.nav-cta span { display: block; font-size: 12px; font-weight: 760; }
.nav-cta small { display: block; font-size: 8px; opacity: .65; }
.menu-toggle {
  display: none;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  padding: 7px 12px;
}
.menu-toggle span, .menu-toggle small { display: block; }
.menu-toggle span { font-size: 12px; font-weight: 700; }
.menu-toggle small { font-size: 8px; color: var(--muted); }

.hero {
  min-height: 720px;
  padding-block: 92px 86px;
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(430px, .97fr);
  align-items: center;
  gap: 64px;
}
.edition-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #cbe1da;
  background: #f6fbf9;
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--green-dark);
}
.edition-pill span:not(.pulse) { font-size: 11px; font-weight: 760; }
.edition-pill small { font-size: 8px; color: var(--muted); border-left: 1px solid #cbe1da; padding-left: 8px; }
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(23, 107, 91, .1);
}
.kicker {
  margin: 24px 0 0;
  color: var(--green);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 15px 0 18px;
  max-width: 660px;
  font-size: clamp(42px, 5.4vw, 70px);
  letter-spacing: -.055em;
  line-height: 1.08;
}
.hero h1 span { color: var(--green); }
.hero-lead {
  max-width: 620px;
  margin: 0;
  color: var(--ink-2);
  font-size: 17px;
  line-height: 1.8;
}
.hero-lead-en {
  max-width: 560px;
  margin: 8px 0 0;
  color: #84928e;
  font-size: 11px;
  line-height: 1.6;
}
.hero-actions { display: flex; gap: 11px; margin-top: 28px; }
.button {
  min-width: 170px;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 20px;
  display: inline-grid;
  place-content: center;
  text-align: center;
  background: #fff;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 15px 30px rgba(16, 40, 34, .1); }
.button span { font-size: 13px; font-weight: 780; }
.button small { font-size: 9px; opacity: .68; }
.button.primary { color: #fff; background: var(--green-dark); border-color: var(--green-dark); }
.button.primary:hover { background: var(--green); }
.button.secondary { color: var(--ink); }
.hero-notes {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.hero-notes > span { display: grid; grid-template-columns: 22px auto; align-items: center; column-gap: 6px; }
.hero-notes i {
  grid-row: span 2;
  width: 20px;
  height: 20px;
  border-radius: 7px;
  background: var(--lime-soft);
  display: grid;
  place-items: center;
  color: var(--green);
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.hero-notes b { font-size: 10px; }
.hero-notes small { color: var(--muted); font-size: 8px; margin-top: -2px; }

.hero-visual { position: relative; min-height: 500px; display: grid; place-items: center; }
.visual-orbit {
  position: absolute;
  border: 1px solid #dce9e4;
  border-radius: 50%;
  pointer-events: none;
}
.orbit-one { width: 520px; height: 520px; }
.orbit-two { width: 400px; height: 400px; border-style: dashed; }
.visual-orbit::after {
  content: "";
  position: absolute;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--lime);
  border: 5px solid #fff;
  box-shadow: 0 7px 18px rgba(16, 40, 34, .18);
}
.orbit-one::after { right: 55px; top: 56px; }
.orbit-two::after { left: 12px; bottom: 115px; background: var(--blue); }
.sim-board {
  position: relative;
  width: min(100%, 470px);
  padding: 20px;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  transform: rotate(1.5deg);
  z-index: 2;
}
.board-head { display: flex; justify-content: space-between; align-items: center; }
.board-head > div { display: grid; }
.board-head span { font-size: 11px; font-weight: 760; }
.board-head small { color: var(--muted); font-size: 8px; }
.demo-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--blue-soft);
  color: #3b56c3;
  border-radius: 999px;
  padding: 6px 10px;
}
.product-stage {
  height: 286px;
  margin-top: 17px;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 47%, rgba(50, 202, 181, .18), transparent 35%),
    linear-gradient(90deg, rgba(110, 177, 170, .08) 1px, transparent 1px),
    linear-gradient(rgba(110, 177, 170, .08) 1px, transparent 1px),
    linear-gradient(155deg, #0d2926, #071b1d 58%, #07151b);
  background-size: auto, 24px 24px, 24px 24px, auto;
  border: 1px solid #214640;
}
.product-stage::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 200px;
  border-radius: 50%;
  background: rgba(73, 220, 192, .08);
  border: 1px solid rgba(126, 235, 216, .11);
  filter: blur(.2px);
  left: calc(50% - 150px);
  top: calc(50% - 100px);
}
.product-stage::after {
  content: "";
  position: absolute;
  width: 1px;
  height: calc(100% - 34px);
  left: 50%;
  top: 17px;
  background: linear-gradient(transparent, rgba(136, 229, 213, .18), transparent);
  pointer-events: none;
}
.orthosis-stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 2;
  pointer-events: none;
}
.scene-caption {
  position: absolute;
  left: 13px;
  top: 12px;
  z-index: 4;
  display: grid;
  padding: 7px 9px;
  border: 1px solid rgba(128, 222, 207, .18);
  border-radius: 10px;
  background: rgba(5, 20, 22, .62);
  backdrop-filter: blur(9px);
}
.scene-caption span { color: #d6fff7; font-size: 8px; font-weight: 760; }
.scene-caption span i {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 5px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 9px rgba(217, 255, 98, .65);
}
.scene-caption small { color: rgba(197, 235, 228, .55); font-size: 6px; }
.force-legend {
  position: absolute;
  left: 13px;
  bottom: 12px;
  z-index: 4;
  display: grid;
  gap: 4px;
  color: rgba(226, 247, 242, .78);
  font-size: 7px;
}
.force-legend span { display: flex; align-items: center; gap: 5px; }
.force-legend small { color: rgba(197, 235, 228, .42); font-size: 6px; }
.force-legend i { width: 14px; height: 2px; border-radius: 2px; }
.force-a { background: #d9ff62; box-shadow: 0 0 7px rgba(217, 255, 98, .5); }
.force-b { background: #66d7ff; box-shadow: 0 0 7px rgba(102, 215, 255, .5); }
.stage-label {
  position: absolute;
  right: 13px;
  bottom: 12px;
  z-index: 4;
  display: grid;
  padding: 8px 11px;
  border-radius: 11px;
  background: rgba(5, 20, 22, .68);
  border: 1px solid rgba(128, 222, 207, .18);
  backdrop-filter: blur(10px);
}
.stage-label strong { color: #edfffb; font-size: 9px; }
.stage-label small { color: rgba(197, 235, 228, .52); font-size: 7px; }
.board-flow { display: flex; align-items: center; gap: 8px; margin-top: 15px; }
.board-flow > i { height: 1px; flex: 1; background: var(--line); }
.flow-item { display: flex; align-items: center; gap: 7px; }
.flow-item > b {
  width: 27px;
  height: 27px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: var(--canvas);
  font-size: 9px;
}
.flow-item.active > b { background: var(--green-dark); color: #fff; }
.flow-item span { display: grid; font-size: 9px; font-weight: 760; }
.flow-item small { font-size: 7px; color: var(--muted); }
.board-summary {
  margin-top: 15px;
  padding: 11px 12px;
  border-radius: 12px;
  background: var(--canvas);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.board-summary span { font-size: 8px; font-weight: 700; }
.board-summary small { color: var(--muted); margin-left: 4px; font-size: 7px; }
.dot { width: 6px; height: 6px; display: inline-block; border-radius: 50%; margin-right: 4px; }
.dot.green { background: var(--green); }
.dot.blue { background: var(--blue); }

.signal-strip { background: var(--green-dark); color: #fff; }
.signal-grid { min-height: 150px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
.signal-grid > div { padding: 6px 28px; border-right: 1px solid rgba(255, 255, 255, .13); }
.signal-grid > div:first-child { padding-left: 0; }
.signal-grid > div:last-child { border: 0; }
.signal-grid strong { font-size: 18px; }
.signal-grid small { margin-left: 6px; font-size: 9px; color: var(--lime); }
.signal-grid p { margin: 4px 0 0; font-size: 10px; color: rgba(255, 255, 255, .65); }

.content-section { padding-block: 112px; }
.section-heading { max-width: 680px; margin-bottom: 42px; }
.section-kicker {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: .06em;
}
.section-kicker small { margin-left: 6px; font-size: 8px; color: var(--muted); letter-spacing: .03em; }
.section-heading h2, .guide-card h2, .boundary-copy h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  letter-spacing: -.04em;
  line-height: 1.2;
}
.section-heading > p:last-child, .boundary-copy > p:last-child {
  color: var(--muted);
  font-size: 13px;
  margin: 12px 0 0;
}
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.capability-card {
  min-height: 330px;
  padding: 30px;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #fff, #fafcfb);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.capability-card:hover {
  transform: translateY(-5px);
  border-color: #bed5cd;
  box-shadow: 0 24px 50px rgba(16, 40, 34, .09);
}
.capability-card::after {
  content: "";
  position: absolute;
  width: 170px;
  height: 170px;
  right: -70px;
  bottom: -90px;
  border-radius: 50%;
  background: var(--lime-soft);
  opacity: .5;
}
.card-number { position: absolute; right: 24px; top: 22px; color: #a4b3ae; font-size: 10px; font-weight: 800; }
.card-icon {
  width: 58px;
  height: 58px;
  position: relative;
  border-radius: 18px;
  background: var(--green-dark);
  margin-bottom: 34px;
  overflow: hidden;
}
.card-icon i, .card-icon b { position: absolute; display: block; }
.icon-define i { width: 26px; height: 32px; border: 2px solid #fff; border-radius: 5px; left: 16px; top: 12px; }
.icon-define b { width: 13px; height: 2px; background: var(--lime); left: 22px; top: 24px; box-shadow: 0 7px 0 var(--lime); }
.icon-sim { background: var(--blue); }
.icon-sim i { width: 27px; height: 27px; border: 2px solid #fff; transform: rotate(30deg); left: 15px; top: 15px; }
.icon-sim b { width: 9px; height: 9px; border-radius: 50%; background: var(--lime); left: 25px; top: 25px; }
.icon-compare { background: #d98f5c; }
.icon-compare i { width: 2px; height: 30px; background: #fff; left: 28px; top: 14px; }
.icon-compare b { width: 30px; height: 20px; border-bottom: 2px solid #fff; left: 14px; top: 18px; transform: skewY(-22deg); }
.icon-report { background: #6955b5; }
.icon-report i { width: 27px; height: 31px; border: 2px solid #fff; border-radius: 5px; left: 15px; top: 13px; }
.icon-report b { width: 14px; height: 9px; border-left: 3px solid var(--lime); border-bottom: 3px solid var(--lime); transform: rotate(-45deg); left: 22px; top: 21px; }
.capability-card h3 { margin: 0; font-size: 20px; line-height: 1.35; }
.capability-card h3 small { display: block; color: var(--muted); font-size: 10px; margin-top: 3px; }
.capability-card > p { max-width: 470px; margin: 12px 0 20px; color: var(--muted); font-size: 12px; }
.capability-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 7px; }
.capability-card li { padding: 7px 10px; border-radius: 9px; background: var(--canvas); font-size: 9px; font-weight: 700; }
.capability-card li small { display: block; color: var(--muted); font-size: 7px; }

.workflow-section { padding-block: 108px; background: var(--green-dark); color: #fff; overflow: hidden; }
.workflow-shell { position: relative; }
.workflow-shell::after {
  content: "";
  position: absolute;
  width: 680px;
  height: 680px;
  right: -480px;
  top: -210px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 50%;
  pointer-events: none;
}
.section-heading.light .section-kicker { color: var(--lime); }
.section-heading.light .section-kicker small, .section-heading.light > p:last-child { color: rgba(255, 255, 255, .6); }
.workflow-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.workflow-step {
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 18px;
  background: rgba(255, 255, 255, .04);
  color: #fff;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 13px;
  text-align: left;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease;
}
.workflow-step:hover { background: rgba(255, 255, 255, .08); }
.workflow-step.active { background: var(--lime); color: var(--ink); border-color: var(--lime); }
.step-index {
  width: 36px;
  height: 36px;
  border: 1px solid currentColor;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 9px;
  font-weight: 820;
  opacity: .75;
}
.workflow-step > span:last-child { display: grid; }
.workflow-step b { font-size: 13px; }
.workflow-step small { font-size: 8px; opacity: .65; }
.workflow-detail {
  min-height: 430px;
  margin-top: 15px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius-xl);
  background: #fff;
  color: var(--ink);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 56px;
}
.detail-badge {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--lime-soft);
  color: var(--green-dark);
  font-size: 9px;
  font-weight: 800;
}
.detail-badge small { color: var(--muted); font-size: 7px; }
.detail-copy h3 { margin: 18px 0 10px; font-size: 30px; letter-spacing: -.03em; }
.detail-copy > p { color: var(--muted); font-size: 12px; max-width: 460px; }
.detail-points { display: grid; gap: 8px; margin-top: 28px; }
.detail-points > span { display: grid; grid-template-columns: 28px 1fr; align-items: center; font-size: 10px; font-weight: 750; }
.detail-points i {
  grid-row: span 2;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--canvas);
  font-size: 8px;
  font-style: normal;
}
.detail-points small { grid-column: 2; color: var(--muted); font-size: 8px; }
.detail-visual {
  min-height: 300px;
  position: relative;
  display: grid;
  place-items: center;
  border-radius: 24px;
  background: var(--canvas);
  overflow: hidden;
}
.detail-visual::before, .detail-visual::after {
  content: "";
  position: absolute;
  width: 230px;
  height: 230px;
  border: 1px solid #cfddd8;
  border-radius: 50%;
}
.detail-visual::after { width: 155px; height: 155px; border-style: dashed; }
.question-core {
  position: relative;
  z-index: 3;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  display: grid;
  place-content: center;
  text-align: center;
  background: var(--green-dark);
  color: #fff;
  box-shadow: 0 20px 40px rgba(16, 63, 55, .23);
}
.question-core i { width: 8px; height: 8px; margin: 0 auto 7px; border-radius: 50%; background: var(--lime); }
.question-core strong { font-size: 11px; }
.question-core small { font-size: 7px; opacity: .65; }
.question-card {
  position: absolute;
  z-index: 4;
  min-width: 82px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  box-shadow: 0 12px 25px rgba(16, 40, 34, .09);
  display: grid;
}
.question-card span { font-size: 10px; font-weight: 760; }
.question-card small { font-size: 7px; color: var(--muted); }
.q-one { top: 42px; left: 36px; }
.q-two { top: 38px; right: 34px; }
.q-three { bottom: 35px; left: calc(50% - 42px); }

.preview-window {
  min-height: 570px;
  display: grid;
  grid-template-columns: 220px 1fr;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}
.preview-rail { padding: 23px 14px; background: var(--green-dark); color: #fff; }
.rail-brand { padding: 0 10px 25px; display: flex; align-items: center; gap: 9px; }
.rail-brand span { width: 28px; height: 28px; border: 7px solid #fff; border-radius: 50%; position: relative; }
.rail-brand span::after { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--lime); right: -10px; top: -8px; }
.rail-brand b { font-size: 14px; }
.rail-item {
  width: 100%;
  border: 0;
  border-radius: 13px;
  background: transparent;
  color: rgba(255, 255, 255, .64);
  padding: 11px;
  display: flex;
  gap: 10px;
  align-items: center;
  text-align: left;
  cursor: pointer;
}
.rail-item:hover, .rail-item.active { background: rgba(255, 255, 255, .1); color: #fff; }
.rail-item i {
  width: 29px;
  height: 29px;
  border-radius: 9px;
  background: rgba(255, 255, 255, .09);
  display: grid;
  place-items: center;
  font-size: 9px;
  font-style: normal;
}
.rail-item span { display: grid; font-size: 10px; font-weight: 740; }
.rail-item small { font-size: 7px; opacity: .6; }
.preview-main { min-width: 0; background: #f6f8f7; }
.preview-top {
  height: 82px;
  padding: 0 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.preview-top > div { display: grid; }
.preview-top small { color: var(--muted); font-size: 8px; }
.preview-top strong { font-size: 14px; }
.preview-top strong em { margin-left: 5px; color: var(--muted); font-size: 9px; font-style: normal; font-weight: 500; }
.preview-top > span { border-radius: 999px; padding: 6px 10px; background: var(--lime-soft); color: var(--green-dark); font-size: 9px; font-weight: 750; }
.preview-top > span small { color: var(--muted); margin-left: 4px; font-size: 7px; }
.preview-content { padding: 22px; }
.preview-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.preview-summary > div {
  min-height: 94px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
  display: grid;
}
.preview-summary small { color: var(--muted); font-size: 7px; }
.preview-summary b { align-self: end; font-size: 12px; }
.preview-summary span { color: var(--muted); font-size: 7px; }
.preview-body { display: grid; grid-template-columns: 1.2fr .8fr; gap: 10px; margin-top: 10px; }
.preview-model {
  min-height: 330px;
  position: relative;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.model-grid {
  position: absolute;
  inset: 0;
  opacity: .35;
  background-image: linear-gradient(#dce6e2 1px, transparent 1px), linear-gradient(90deg, #dce6e2 1px, transparent 1px);
  background-size: 25px 25px;
}
.model-object {
  width: 150px;
  height: 230px;
  border-radius: 56% 44% 48% 42% / 30% 34% 66% 70%;
  background: linear-gradient(145deg, #ddff79, #5dc5a0 50%, #4f72ff);
  transform: rotate(-13deg);
  position: relative;
  box-shadow: inset -20px -20px 35px rgba(16, 63, 55, .18), 0 25px 45px rgba(16, 63, 55, .16);
}
.model-object i, .model-object b, .model-object em {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: 50%;
}
.model-object i { inset: 22px; }
.model-object b { width: 65px; height: 65px; left: 28px; top: 48px; }
.model-object em { width: 40px; height: 40px; right: 20px; bottom: 42px; }
.preview-model > small {
  position: absolute;
  left: 15px;
  bottom: 13px;
  padding: 5px 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .88);
  color: var(--muted);
  font-size: 7px;
}
.preview-list { padding: 19px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.list-head { display: grid; margin-bottom: 16px; }
.list-head b { font-size: 12px; }
.list-head small { color: var(--muted); font-size: 7px; }
.preview-list > span { display: grid; grid-template-columns: 32px 1fr; align-items: center; padding: 12px 0; border-top: 1px solid var(--line); }
.preview-list > span i {
  grid-row: span 2;
  width: 23px;
  height: 23px;
  border-radius: 8px;
  background: var(--canvas);
  display: grid;
  place-items: center;
  font-size: 8px;
  font-style: normal;
}
.preview-list > span.done i { background: var(--lime-soft); color: var(--green); }
.preview-list b { font-size: 9px; }
.preview-list b small { display: block; color: var(--muted); font-size: 7px; font-weight: 500; }

.guide-section { padding-bottom: 112px; }
.guide-card {
  min-height: 250px;
  padding: 40px 44px;
  display: grid;
  grid-template-columns: 90px 1fr auto;
  align-items: center;
  gap: 30px;
  border-radius: var(--radius-xl);
  background: var(--lime);
  overflow: hidden;
  position: relative;
}
.guide-card::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -170px;
  top: -150px;
  border: 1px solid rgba(16, 40, 34, .15);
  border-radius: 50%;
}
.guide-mark {
  width: 82px;
  height: 82px;
  border-radius: 26px;
  background: var(--green-dark);
  position: relative;
}
.guide-mark span { position: absolute; width: 34px; height: 26px; border: 3px solid #fff; border-radius: 12px; left: 18px; top: 19px; }
.guide-mark span::after { content: ""; position: absolute; width: 7px; height: 7px; border-left: 3px solid #fff; border-bottom: 3px solid #fff; left: 4px; bottom: -7px; transform: skew(-20deg); }
.guide-mark i { position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--lime); left: 31px; top: 29px; box-shadow: 13px 0 0 var(--lime); }
.guide-card .section-kicker { color: var(--green-dark); }
.guide-card .section-kicker small { color: rgba(16, 40, 34, .58); }
.guide-card h2 { font-size: clamp(25px, 3vw, 38px); }
.guide-card p:not(.section-kicker) { margin: 8px 0 0; max-width: 650px; font-size: 11px; color: rgba(16, 40, 34, .72); }
.light-button { position: relative; z-index: 2; border-color: transparent; }

.boundary-section { padding-block: 110px; background: var(--canvas); }
.boundary-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 80px; align-items: start; }
.boundary-copy { position: sticky; top: 118px; }
.boundary-list { display: grid; gap: 10px; }
.boundary-list article {
  padding: 22px;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.boundary-list article > span {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--green-dark);
  color: #fff;
  font-size: 9px;
  font-weight: 800;
}
.boundary-list b { font-size: 13px; }
.boundary-list b + small { display: block; color: var(--green); font-size: 8px; }
.boundary-list p { margin: 5px 0 0; color: var(--muted); font-size: 10px; }

.site-footer { padding-block: 38px; background: #0c211d; color: #fff; }
.footer-grid { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.footer-brand { display: grid; }
.footer-brand strong { font-size: 17px; }
.footer-brand em { color: var(--lime); font-style: normal; }
.footer-brand small { margin-top: 4px; font-size: 8px; color: rgba(255, 255, 255, .5); }
.site-footer p { margin: 0; text-align: right; font-size: 10px; color: rgba(255, 255, 255, .72); }
.site-footer p small { font-size: 8px; color: rgba(255, 255, 255, .45); }

.guide-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  min-width: 166px;
  height: 58px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 18px;
  background: var(--green-dark);
  color: #fff;
  box-shadow: 0 18px 45px rgba(16, 40, 34, .25);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px 7px 8px;
  cursor: pointer;
  transition: transform .2s ease, opacity .2s ease;
}
.guide-fab:hover { transform: translateY(-3px); }
.guide-fab.hidden { opacity: 0; pointer-events: none; transform: translateY(12px); }
.guide-fab > span:last-child { display: grid; text-align: left; }
.guide-fab b { font-size: 11px; }
.guide-fab small { font-size: 8px; color: rgba(255, 255, 255, .58); }
.fab-icon, .assistant-avatar {
  width: 43px;
  height: 43px;
  border-radius: 14px;
  background: var(--lime);
  position: relative;
  flex: 0 0 auto;
}
.fab-icon i, .assistant-avatar i {
  position: absolute;
  width: 22px;
  height: 17px;
  border: 2px solid var(--green-dark);
  border-radius: 8px;
  left: 9px;
  top: 10px;
}
.fab-icon i::after, .assistant-avatar i::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  border-left: 2px solid var(--green-dark);
  border-bottom: 2px solid var(--green-dark);
  left: 3px;
  bottom: -6px;
  transform: skew(-20deg);
}
.fab-icon b, .assistant-avatar b {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--green-dark);
  left: 15px;
  top: 17px;
  box-shadow: 8px 0 0 var(--green-dark);
}
.guide-panel {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 110;
  width: min(390px, calc(100vw - 32px));
  height: min(610px, calc(100vh - 42px));
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 30px 90px rgba(16, 40, 34, .25);
  opacity: 0;
  transform: translateY(18px) scale(.97);
  pointer-events: none;
  transform-origin: bottom right;
  transition: opacity .2s ease, transform .2s ease;
  overflow: hidden;
}
.guide-panel.open { opacity: 1; transform: none; pointer-events: auto; }
.guide-panel header {
  min-height: 84px;
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 11px;
  background: var(--green-dark);
  color: #fff;
}
.assistant-avatar { width: 46px; height: 46px; border-radius: 15px; }
.guide-panel header > div:nth-child(2) { display: grid; min-width: 0; }
.guide-panel header strong { font-size: 12px; }
.guide-panel header strong small { color: var(--lime); margin-left: 4px; font-size: 8px; }
.guide-panel header span { font-size: 7px; color: rgba(255, 255, 255, .58); }
.guide-panel header span i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--lime); margin-right: 5px; }
.guide-panel header > button {
  margin-left: auto;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 11px;
  background: rgba(255, 255, 255, .08);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
}
.guide-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  background: #f7f9f8;
}
.message {
  width: fit-content;
  max-width: 88%;
  margin-bottom: 11px;
  padding: 11px 12px;
  border-radius: 15px;
  font-size: 10px;
  line-height: 1.65;
  box-shadow: 0 5px 15px rgba(16, 40, 34, .05);
}
.message span, .message small { display: block; }
.message small { margin-top: 5px; font-size: 8px; line-height: 1.45; opacity: .58; }
.message.assistant { border: 1px solid var(--line); background: #fff; border-top-left-radius: 5px; }
.message.user { margin-left: auto; background: var(--green-dark); color: #fff; border-bottom-right-radius: 5px; }
.quick-questions { padding: 10px 12px 5px; display: flex; gap: 6px; overflow-x: auto; }
.quick-questions button {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 7px 9px;
  color: var(--ink);
  font-size: 8px;
  cursor: pointer;
}
.quick-questions small { display: block; color: var(--muted); font-size: 6px; }
.guide-form { padding: 8px 12px; display: grid; grid-template-columns: 1fr 66px; gap: 7px; }
.guide-form input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
  font-size: 10px;
}
.guide-form input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(23, 107, 91, .08); }
.guide-form button {
  border: 0;
  border-radius: 12px;
  background: var(--green-dark);
  color: #fff;
  cursor: pointer;
}
.guide-form button span, .guide-form button small { display: block; }
.guide-form button span { font-size: 9px; font-weight: 720; }
.guide-form button small { font-size: 6px; opacity: .55; }
.guide-disclaimer { margin: 0 12px 10px; text-align: center; color: var(--muted); font-size: 7px; }

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1050px) {
  .nav-cta { display: none; }
  .site-nav a { min-width: 78px; padding-inline: 8px; }
  .hero { grid-template-columns: 1fr; padding-top: 76px; gap: 34px; }
  .hero-copy { max-width: 760px; }
  .hero-visual { min-height: 540px; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .boundary-grid { gap: 45px; }
}

@media (max-width: 800px) {
  .section-shell { width: min(100% - 30px, 680px); }
  .nav-shell { width: calc(100% - 28px); }
  .brand { min-width: 0; }
  .brand-copy small { display: none; }
  .menu-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 69px;
    left: 14px;
    right: 14px;
    display: none;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 20px 50px rgba(16, 40, 34, .15);
  }
  .site-nav.open { display: grid; grid-template-columns: repeat(2, 1fr); }
  .site-nav a { text-align: left; }
  .hero { min-height: auto; padding-block: 64px; }
  .hero h1 { font-size: clamp(39px, 11vw, 60px); }
  .hero-lead { font-size: 14px; }
  .hero-visual { min-height: 465px; }
  .visual-orbit.orbit-one { width: 430px; height: 430px; }
  .visual-orbit.orbit-two { width: 330px; height: 330px; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); padding-block: 22px; }
  .signal-grid > div { padding: 15px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
  .signal-grid > div:first-child { padding-left: 15px; }
  .signal-grid > div:nth-child(2) { border-right: 0; }
  .capability-grid { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr; }
  .workflow-detail { grid-template-columns: 1fr; padding: 28px; }
  .preview-window { grid-template-columns: 72px 1fr; }
  .preview-rail { padding-inline: 9px; }
  .rail-brand b, .rail-item span { display: none; }
  .rail-brand { padding-inline: 10px; }
  .preview-summary { grid-template-columns: 1fr; }
  .preview-summary > div { min-height: 76px; }
  .preview-body { grid-template-columns: 1fr; }
  .guide-card { grid-template-columns: 72px 1fr; padding: 30px; }
  .guide-mark { width: 70px; height: 70px; }
  .guide-card .button { grid-column: 1 / -1; }
  .boundary-grid { grid-template-columns: 1fr; gap: 28px; }
  .boundary-copy { position: static; }
}

@media (max-width: 520px) {
  .site-header .brand-copy strong { font-size: 16px; }
  .brand-mark { width: 40px; height: 40px; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .hero-notes { display: grid; grid-template-columns: repeat(2, 1fr); }
  .hero-visual { min-height: 410px; }
  .sim-board { padding: 14px; border-radius: 22px; }
  .product-stage { height: 238px; }
  .force-legend { display: none; }
  .board-summary { display: grid; }
  .flow-item span { display: none; }
  .content-section, .workflow-section, .boundary-section { padding-block: 76px; }
  .signal-grid { grid-template-columns: 1fr; }
  .signal-grid > div { border-right: 0; }
  .capability-card { padding: 24px; }
  .workflow-detail { padding: 21px; }
  .detail-visual { min-height: 265px; }
  .preview-window { min-height: 610px; grid-template-columns: 1fr; }
  .preview-rail { display: flex; align-items: center; gap: 5px; padding: 10px; }
  .rail-brand { padding: 0 8px 0 0; }
  .rail-brand span { width: 25px; height: 25px; border-width: 6px; }
  .rail-item { width: auto; flex: 1; justify-content: center; padding: 7px; }
  .preview-top { padding-inline: 15px; }
  .preview-content { padding: 12px; }
  .preview-model { min-height: 280px; }
  .guide-card { grid-template-columns: 1fr; padding: 28px; }
  .footer-grid { display: grid; }
  .site-footer p { text-align: left; }
  .guide-fab { right: 14px; bottom: 14px; min-width: 0; width: 58px; padding: 7px; border-radius: 18px; }
  .guide-fab > span:last-child { display: none; }
  .guide-panel { right: 8px; bottom: 8px; width: calc(100vw - 16px); height: min(640px, calc(100vh - 16px)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}