.physical-trust-paper {
  --pt-violet: #6554e8;
  --pt-violet-soft: #dcd7ff;
  --pt-ink: #121312;
  --pt-paper: #f4f3ef;
}

.physical-trust-paper .physical-trust-cover {
  background:
    radial-gradient(circle at 79% 35%, rgba(101, 84, 232, 0.13), transparent 27%),
    linear-gradient(118deg, #f7f6f1 0%, #efeee9 64%, #e5e4e0 100%);
}

.physical-trust-cover h1 {
  max-width: 1180px;
  font-size: clamp(58px, 8.15vw, 124px);
}

.physical-trust-cover > p {
  max-width: 700px;
}

.boundary-atom {
  position: absolute !important;
  top: 11%;
  right: -8vw;
  width: min(58vw, 820px);
  aspect-ratio: 1;
  opacity: 0.88;
}

.boundary-atom i {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 82%;
  height: 34%;
  border: 1px solid rgba(25, 27, 23, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(var(--r));
}

.boundary-atom i:nth-child(1) { --r: 0deg; }
.boundary-atom i:nth-child(2) { --r: 60deg; }
.boundary-atom i:nth-child(3) { --r: 120deg; }

.boundary-atom b {
  position: absolute;
  top: calc(50% - 14px);
  left: calc(50% - 14px);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--pt-violet);
  box-shadow: 0 0 0 34px rgba(101, 84, 232, 0.06), 0 0 0 78px rgba(101, 84, 232, 0.025);
}

.boundary-atom span {
  position: absolute;
  top: calc(50% - 4px);
  left: calc(50% - 4px);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #151616;
  animation: pt-orbit 12s linear infinite;
}

.boundary-atom span:nth-of-type(2) { animation-delay: -4s; animation-duration: 17s; }
.boundary-atom span:nth-of-type(3) { animation-delay: -9s; animation-duration: 22s; }

@keyframes pt-orbit {
  from { transform: rotate(0deg) translateX(250px) rotate(0deg); }
  to { transform: rotate(360deg) translateX(250px) rotate(-360deg); }
}

.physical-trust-paper .publication-record-mark b,
.physical-trust-paper .publication-record-head h2 em,
.physical-trust-paper .publication-record-head > span {
  color: var(--pt-violet);
}

.physical-trust-paper .publication-record-mark i {
  background: var(--pt-violet-soft);
  box-shadow: 0 0 0 9px rgba(220, 215, 255, 0.1);
}

.pt-gap-graphic {
  min-height: 590px;
  display: grid;
  align-content: center;
  gap: 18px;
}

.pt-gap-row {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
}

.pt-gap-node {
  min-height: 135px;
  padding: 24px;
  border: 1px solid rgba(25, 27, 23, 0.18);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.45);
}

.pt-gap-node span,
.pt-gap-node small {
  font-size:11px;
  letter-spacing: 0.15em;
}

.pt-gap-node b {
  max-width: 260px;
  font-size: 18px;
  font-weight: 450;
  line-height: 1.3;
}

.pt-gap-node small { color: #686b64; }
.pt-gap-node.is-physical { border-color: rgba(101, 84, 232, 0.5); }
.pt-gap-node.is-physical span { color: var(--pt-violet); }

.pt-gap-arrow {
  height: 1px;
  background: rgba(25, 27, 23, 0.3);
  position: relative;
}

.pt-gap-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}

.pt-gap-note {
  padding: 20px 24px;
  border-radius: 18px;
  background: #1c1d1b;
  color: #f5f4ef;
  font: 400 16px/1.55 Georgia, serif;
}

.equivalence-board {
  min-height: 560px;
  padding: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px),
    #181918;
  background-size: 42px 42px;
}

.equivalence-board > span,
.assurance-panel > span,
.ptas-path > span {
  color: #9c9e97;
  font-size:11px;
  letter-spacing: 0.17em;
}

.equivalence-formula {
  padding: 30px 0;
  font: 400 clamp(24px, 3vw, 42px)/1.35 Georgia, serif;
  color: #f6f4ef;
}

.equivalence-formula b { color: #ada2ff; font-weight: 400; }

.equivalence-result {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}

.equivalence-result div {
  min-height: 96px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  font-size:11px;
  letter-spacing: 0.13em;
  display: flex;
  align-items: flex-end;
}

.equivalence-result i {
  width: 44px;
  height: 1px;
  background: #ada2ff;
}

.reference-chain {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.reference-chain div {
  min-height: 165px;
  padding: 20px;
  border: 1px solid rgba(25, 27, 23, 0.17);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(255,255,255,.42);
}

.reference-chain span {
  color: var(--pt-violet);
  font-size:11px;
}

.reference-chain b { font-size: 17px; font-weight: 450; }
.reference-chain small { color: #666962; font-size:11px; line-height: 1.45; }

.pt-interlude {
  background:
    radial-gradient(circle at 50% 50%, rgba(101, 84, 232, 0.13), transparent 34%),
    #e9e8e3 !important;
}

.assurance-panel {
  min-height: 570px;
  padding: 32px;
  border-radius: 26px;
  background: #1b1c1a;
  color: #f4f3ef;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.assurance-rings {
  position: relative;
  min-height: 390px;
  display: grid;
  place-items: center;
}

.assurance-rings div {
  position: absolute;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 50%;
  font-size:11px;
  letter-spacing: .14em;
}

.assurance-rings div:nth-child(1) { width: 130px; height: 130px; background: var(--pt-violet); }
.assurance-rings div:nth-child(2) { width: 230px; height: 230px; }
.assurance-rings div:nth-child(3) { width: 330px; height: 330px; }
.assurance-rings div:nth-child(4) { width: 410px; height: 410px; }

.application-profiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.application-profiles div {
  min-height: 210px;
  padding: 24px;
  border: 1px solid rgba(25, 27, 23, 0.17);
  border-radius: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(255,255,255,.46);
}

.application-profiles span { color: var(--pt-violet); font-size:11px; }
.application-profiles b { font-size: 20px; font-weight: 450; }
.application-profiles p { margin: 0; color: #666962; font-size:13px; line-height: 1.55; }

.ptas-path {
  min-height: 580px;
  padding: 32px;
  border-radius: 26px;
  background: #181918;
  color: #f5f4ef;
}

.ptas-steps { margin-top: 40px; }

.ptas-steps div {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  gap: 18px;
  align-items: center;
  min-height: 78px;
  border-top: 1px solid rgba(255,255,255,.16);
}

.ptas-steps span { color: #ada2ff; font-size:11px; }
.ptas-steps b { font-size:15px; font-weight: 450; }
.ptas-steps small { color: #969891; font-size:11px; letter-spacing: .12em; }

.limits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.limits-grid div {
  min-height: 150px;
  padding: 22px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.limits-grid span { color: #ada2ff; font-size:11px; }
.limits-grid b { font: 400 18px/1.35 Georgia, serif; }

.physical-trust-paper .control-conclusion {
  background:
    radial-gradient(circle at 50% 42%, rgba(101,84,232,.13), transparent 42%),
    #f4f2ed;
}

.physical-trust-paper .control-conclusion h2 em { color: var(--pt-violet); }

@media (max-width: 1000px) {
  .physical-trust-paper .pt-gap-graphic,
  .physical-trust-paper .equivalence-board,
  .physical-trust-paper .reference-chain,
  .physical-trust-paper .assurance-panel,
  .physical-trust-paper .application-profiles,
  .physical-trust-paper .ptas-path,
  .physical-trust-paper .limits-grid { grid-column: 2; }
}

@media (max-width: 800px) {
  .physical-trust-cover h1 { font-size: 48px; line-height: .98; }
  .boundary-atom { width: 115vw; right: -65vw; top: 18%; opacity: .36; }
  @keyframes pt-orbit {
    from { transform: rotate(0deg) translateX(145px) rotate(0deg); }
    to { transform: rotate(360deg) translateX(145px) rotate(-360deg); }
  }
  .pt-gap-graphic,
  .equivalence-board,
  .assurance-panel,
  .ptas-path { min-height: auto; margin-top: 62px; }
  .pt-gap-row { grid-template-columns: 1fr; gap: 12px; }
  .pt-gap-arrow { width: 1px; height: 36px; margin: 0 auto; }
  .pt-gap-arrow::after { right: -3px; top: auto; bottom: 0; transform: rotate(135deg); }
  .equivalence-board,
  .assurance-panel,
  .ptas-path { padding: 24px; border-radius: 20px; }
  .equivalence-result { grid-template-columns: 1fr; }
  .equivalence-result i { width: 1px; height: 30px; margin: 0 auto; }
  .reference-chain,
  .application-profiles,
  .limits-grid { grid-template-columns: 1fr; margin-top: 62px; }
  .assurance-rings { transform: scale(.78); min-height: 360px; }
  .ptas-steps div { grid-template-columns: 34px 1fr; padding: 13px 0; }
  .ptas-steps small { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
  .boundary-atom span { animation: none; }
}