:root {
  --spear-detail-paper: #edf6fa;
  --spear-detail-cold: #b7d6e4;
  --spear-detail-muted: rgba(199, 222, 232, 0.64);
  --spear-detail-dim: rgba(172, 205, 220, 0.42);
  --spear-detail-line-strong: rgba(163, 204, 223, 0.36);
  --spear-detail-line: rgba(151, 196, 216, 0.22);
  --spear-detail-line-faint: rgba(139, 188, 210, 0.09);
  --spear-detail-split: 52vw;
  --spear-detail-unit: clamp(6px, 0.36vw, 9px);
}

.spear-project-detail {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #000;
  color: var(--spear-detail-paper);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 480ms cubic-bezier(0.4, 0, 0.2, 1),
    filter 820ms cubic-bezier(0.4, 0, 0.2, 1),
    transform 820ms cubic-bezier(0.4, 0, 0.2, 1);
}

.spear-project-detail.is-present {
  opacity: 1;
}

.spear-project-detail__scroll {
  position: absolute;
  inset: 0 0 0 auto;
  width: calc(100vw - var(--spear-detail-split));
  min-width: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  touch-action: pan-y;
  pointer-events: auto;
  outline: none;
  background:
    linear-gradient(90deg, rgba(112, 165, 190, 0.025), transparent 18%),
    #000;
}

.spear-project-detail__scroll::-webkit-scrollbar {
  display: none;
}

.spear-project-detail__scroll:focus-visible {
  box-shadow: inset 0 0 0 1px var(--spear-detail-line-strong);
}

.spear-project-detail__rail {
  position: relative;
  width: 100%;
  min-height: 100%;
  padding-inline:
    clamp(42px, 3.4vw, 82px)
    clamp(64px, 4.8vw, 112px);
  box-sizing: border-box;
  background: #000;
}

.spear-project-detail__spine {
  position: absolute;
  z-index: 3;
  top: calc(var(--spear-detail-unit) * 8);
  right: clamp(15px, 1.15vw, 26px);
  bottom: calc(var(--spear-detail-unit) * 8);
  width: 17px;
  display: grid;
  grid-template-rows: auto repeat(5, 1fr) auto;
  justify-items: start;
  color: var(--spear-detail-dim);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: 6px;
  line-height: 1;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.spear-project-detail__spine::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 0;
  border-left: 1px solid var(--spear-detail-line);
}

.spear-project-detail__spine::after {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 0;
  width: 12px;
  background: repeating-linear-gradient(
    to bottom,
    var(--spear-detail-line-strong) 0 1px,
    transparent 1px 16px
  );
  mask-image: linear-gradient(90deg, #000 0 45%, transparent 45%);
}

.spear-project-detail__spine i {
  align-self: center;
  width: 9px;
  border-top: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__section {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  align-content: start;
  min-height: 0;
  padding-block: clamp(72px, 8.5svh, 112px);
  box-sizing: border-box;
  isolation: isolate;
}

.spear-project-detail__section::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: calc(var(--spear-detail-unit) * 5) 0;
  opacity: 0.58;
  background-image:
    linear-gradient(to right, var(--spear-detail-line-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--spear-detail-line-faint) 1px, transparent 1px);
  background-size:
    calc(100% / 12) 100%,
    100% calc(var(--spear-detail-unit) * 4);
  mask-image: linear-gradient(
    to bottom,
    transparent,
    rgba(0, 0, 0, 0.42) 12%,
    rgba(0, 0, 0, 0.42) 88%,
    transparent
  );
  pointer-events: none;
}

.spear-project-detail__hero {
  min-height: 0;
  grid-template-rows: auto auto auto;
  align-content: start;
  padding-top: calc(var(--spear-detail-unit) * 7);
  padding-bottom: 0;
}

.spear-project-detail__section--text {
  min-height: 0;
  padding-top: 0;
}

/*
 * The 21:9 summary film occupies the approved document-flow reserve between
 * 01 and 02. Its native asset is also 21:9, so this slot introduces neither
 * cropping nor a layout shift. Every following reveal and return boundary
 * therefore keeps the exact spacing established by the empty reserve.
 */
.spear-project-detail__video-reserve {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 21 / 9;
  background: #000;
}

.spear-project-detail__summary-video-opener,
.spear-project-detail__summary-video-mount,
.spear-project-detail__summary-video {
  display: block;
  width: 100%;
  height: 100%;
}

.spear-project-detail__summary-video-opener {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  color: inherit;
  background: #000;
  cursor: pointer;
  appearance: none;
}

.spear-project-detail__summary-video-opener:focus-visible {
  outline: 1px solid rgba(237, 246, 250, 0.82);
  outline-offset: 4px;
}

.spear-project-detail__summary-video-mount {
  position: relative;
  overflow: hidden;
  background: #000;
}

.spear-project-detail__summary-video {
  object-fit: cover;
  object-position: 50% 50%;
  background: #000;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.spear-project-detail__summary-video::-webkit-media-controls {
  display: none !important;
}

.spear-project-detail__section--media {
  min-height: 0;
}

.spear-project-detail__section--system {
  min-height: 0;
}

.spear-project-detail__section--closing {
  min-height: 0;
  padding-bottom: clamp(132px, 16svh, 220px);
}

.spear-project-detail__hero-header,
.spear-project-detail__hero-footer {
  grid-column: 1 / 13;
  display: grid;
  align-items: center;
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(7px, 0.43vw, 9px);
  letter-spacing: 0.13em;
  line-height: 1.25;
  color: var(--spear-detail-muted);
}

.spear-project-detail__hero-header {
  grid-template-columns: 1fr 5fr 6fr;
  gap: calc(var(--spear-detail-unit) * 2);
  min-height: calc(var(--spear-detail-unit) * 5);
  padding-bottom: calc(var(--spear-detail-unit) * 1.5);
  border-bottom: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__hero-header > span:last-child {
  justify-self: end;
}

.spear-project-detail__hero-index {
  width: fit-content;
  padding: 0.42em 0.55em 0.34em;
  color: #020506;
  background: var(--spear-detail-paper);
  font-family: "Bahnschrift SemiCondensed", "Arial Narrow", sans-serif;
  font-size: clamp(10px, 0.64vw, 14px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
}

.spear-project-detail__title-cluster {
  grid-column: 1 / 13;
  align-self: start;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  width: 100%;
  padding-block:
    calc(var(--spear-detail-unit) * 8)
    calc(var(--spear-detail-unit) * 4);
}

.spear-project-detail__kicker {
  grid-column: 1 / 13;
  margin: 0 0 calc(var(--spear-detail-unit) * 1.2);
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(7px, 0.46vw, 10px);
  letter-spacing: 0.18em;
  line-height: 1.2;
}

.spear-project-detail__title {
  grid-column: 1 / 13;
  margin: 0;
  color: var(--spear-detail-paper);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(54px, 4.15vw, 88px);
  font-weight: 760;
  letter-spacing: -0.068em;
  line-height: 0.92;
  white-space: nowrap;
}

.spear-project-detail__handoff {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  align-items: start;
  margin-top: calc(var(--spear-detail-unit) * 3.2);
  padding-top: calc(var(--spear-detail-unit) * 2);
  border-top: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__handoff h2 {
  grid-column: 1 / 8;
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(22px, 1.75vw, 38px);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.04;
}

.spear-project-detail__handoff p {
  grid-column: 8 / 13;
  margin: 0;
  color: var(--spear-detail-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(10px, 0.66vw, 14px);
  font-weight: 380;
  letter-spacing: 0.015em;
  line-height: 1.7;
}

.spear-project-detail__hero-density {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: calc(var(--spear-detail-unit) * 2);
  margin-top: calc(var(--spear-detail-unit) * 3.5);
}

.spear-project-detail__dense-frame {
  position: relative;
  min-width: 0;
  padding: calc(var(--spear-detail-unit) * 2.5);
  border: 1px solid var(--spear-detail-line-strong);
  background: rgba(8, 18, 23, 0.22);
  box-shadow:
    inset 0 0 0 4px #000,
    inset 0 0 0 5px var(--spear-detail-line);
}

.spear-project-detail__dense-frame::before,
.spear-project-detail__dense-frame::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.spear-project-detail__dense-frame::before {
  inset: -5px 8% -5px 8%;
  border-block: 1px solid var(--spear-detail-line);
}

.spear-project-detail__dense-frame::after {
  inset: 18% -5px;
  border-inline: 1px solid var(--spear-detail-line);
}

.spear-project-detail__cross-rail {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.spear-project-detail__cross-rail line {
  stroke: rgba(166, 207, 224, 0.72);
  stroke-width: 0.42;
  vector-effect: non-scaling-stroke;
}

.spear-project-detail__cross-rail-pass line {
  stroke: rgba(145, 190, 210, 0.5);
  stroke-width: 0.32;
}

.spear-project-detail__dense-frame > :not(.spear-project-detail__cross-rail),
.spear-project-detail__media-shell > :not(.spear-project-detail__cross-rail) {
  position: relative;
  z-index: 2;
}

.spear-project-detail__micro-head {
  display: flex;
  justify-content: space-between;
  gap: calc(var(--spear-detail-unit) * 2);
  padding-bottom: calc(var(--spear-detail-unit) * 1.4);
  border-bottom: 1px solid var(--spear-detail-line);
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(6px, 0.4vw, 8px);
  letter-spacing: 0.13em;
}

.spear-project-detail__text-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--spear-detail-unit) * 2.4);
  padding-top: calc(var(--spear-detail-unit) * 2);
}

.spear-project-detail__text-columns p {
  margin: 0;
  color: rgba(205, 226, 235, 0.66);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(9px, 0.56vw, 12px);
  font-weight: 350;
  letter-spacing: 0.015em;
  line-height: 1.68;
}

.spear-project-detail__text-columns strong {
  color: var(--spear-detail-paper);
  font-weight: 610;
}

.spear-project-detail__field-index,
.spear-project-detail__spec-panel,
.spear-project-detail__closing-ledger {
  display: grid;
  align-content: start;
  min-width: 0;
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(6px, 0.4vw, 8px);
  letter-spacing: 0.08em;
  color: var(--spear-detail-muted);
}

.spear-project-detail__field-index {
  padding: calc(var(--spear-detail-unit) * 1.2);
  border: 1px solid var(--spear-detail-line-strong);
  background: rgba(0, 0, 0, 0.82);
}

.spear-project-detail__hero-weave {
  position: relative;
  min-width: 0;
  min-height: calc(var(--spear-detail-unit) * 18);
  overflow: hidden;
  border: 1px solid var(--spear-detail-line-strong);
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 calc(var(--spear-detail-unit) * 1.5 - 1px),
      var(--spear-detail-line-faint) calc(var(--spear-detail-unit) * 1.5 - 1px) calc(var(--spear-detail-unit) * 1.5)
    );
}

.spear-project-detail__hero-weave svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.86;
}

.spear-project-detail__hero-weave line {
  stroke: var(--spear-detail-line-strong);
  stroke-width: 0.3;
  vector-effect: non-scaling-stroke;
}

.spear-project-detail__hero-weave .spear-project-detail__field-index {
  position: absolute;
  z-index: 2;
  right: calc(var(--spear-detail-unit) * 1.2);
  bottom: calc(var(--spear-detail-unit) * 1.2);
  left: 38%;
}

.spear-project-detail__field-index > div,
.spear-project-detail__spec-panel > div,
.spear-project-detail__closing-ledger > div {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: calc(var(--spear-detail-unit) * 0.8);
  align-items: baseline;
  min-width: 0;
  padding-block: calc(var(--spear-detail-unit) * 0.75);
  border-bottom: 1px solid var(--spear-detail-line-faint);
}

.spear-project-detail__field-index i,
.spear-project-detail__spec-panel i,
.spear-project-detail__closing-ledger i {
  min-width: 6px;
  border-bottom: 1px dotted var(--spear-detail-line-strong);
  transform: translateY(-0.2em);
}

.spear-project-detail__field-index b,
.spear-project-detail__spec-panel b,
.spear-project-detail__closing-ledger b {
  color: var(--spear-detail-cold);
  font-weight: 600;
}

.spear-project-detail__hero-footer {
  grid-template-columns: repeat(4, 1fr);
  gap: calc(var(--spear-detail-unit) * 2);
  padding-top: calc(var(--spear-detail-unit) * 1.5);
  border-top: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__hero-footer span:nth-child(2),
.spear-project-detail__hero-footer span:nth-child(3) {
  justify-self: center;
}

.spear-project-detail__hero-footer span:last-child {
  justify-self: end;
}

.spear-project-detail__enter {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition:
    opacity 620ms cubic-bezier(0.4, 0, 0.2, 1),
    transform 620ms cubic-bezier(0.4, 0, 0.2, 1);
}

.spear-project-detail__enter--01 { transition-delay: 90ms; }
.spear-project-detail__enter--02 { transition-delay: 150ms; }
.spear-project-detail__enter--03 { transition-delay: 210ms; }
.spear-project-detail__enter--04 { transition-delay: 280ms; }
.spear-project-detail__enter--05 { transition-delay: 350ms; }

.spear-project-detail.is-present .spear-project-detail__enter {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.spear-project-detail__section-head {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  align-items: start;
  margin-bottom: calc(var(--spear-detail-unit) * 4);
  padding-top: calc(var(--spear-detail-unit) * 1.5);
  border-top: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__section-head--compact {
  margin-bottom: calc(var(--spear-detail-unit) * 4);
}

.spear-project-detail__number {
  grid-column: 1 / 3;
  width: fit-content;
  color: var(--spear-detail-paper);
  font-family: "Bahnschrift SemiCondensed", "Arial Narrow", sans-serif;
  font-size: clamp(44px, 3.35vw, 72px);
  font-weight: 620;
  letter-spacing: -0.055em;
  line-height: 0.82;
}

.spear-project-detail__section-title {
  grid-column: 3 / 13;
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
}

.spear-project-detail__section-title > p:first-child,
.spear-project-detail__closing > p:first-child {
  grid-column: 1 / -1;
  margin: 0 0 calc(var(--spear-detail-unit) * 1.25);
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(6px, 0.4vw, 8px);
  letter-spacing: 0.14em;
  line-height: 1.2;
}

.spear-project-detail__section-title h2 {
  grid-column: 1 / -1;
  max-width: 10em;
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(30px, 2.5vw, 54px);
  font-weight: 650;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.spear-project-detail__section-lead {
  grid-column: 5 / 11;
  margin: calc(var(--spear-detail-unit) * 2.6) 0 0;
  padding-top: calc(var(--spear-detail-unit) * 1.4);
  border-top: 1px solid var(--spear-detail-line);
  color: var(--spear-detail-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(10px, 0.64vw, 14px);
  font-weight: 350;
  letter-spacing: 0.018em;
  line-height: 1.7;
}

.spear-project-detail__editorial-grid {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  row-gap: calc(var(--spear-detail-unit) * 3);
}

.spear-project-detail__dense-copy {
  grid-column: 1 / 9;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--spear-detail-line-strong);
  border-left: 1px solid var(--spear-detail-line);
}

.spear-project-detail__dense-copy section {
  min-height: calc(var(--spear-detail-unit) * 25);
  padding: calc(var(--spear-detail-unit) * 2.1);
  border-right: 1px solid var(--spear-detail-line);
  border-bottom: 1px solid var(--spear-detail-line);
  background: rgba(8, 20, 26, 0.13);
}

.spear-project-detail__dense-copy span,
.spear-project-detail__media-ledger span,
.spear-project-detail__system-cell > span,
.spear-project-detail__signal-field header,
.spear-project-detail__signal-field > div > span {
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(6px, 0.4vw, 8px);
  letter-spacing: 0.13em;
}

.spear-project-detail__dense-copy h3,
.spear-project-detail__media-ledger h3 {
  margin: calc(var(--spear-detail-unit) * 1.7) 0 calc(var(--spear-detail-unit) * 1.2);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(14px, 1vw, 21px);
  font-weight: 580;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.spear-project-detail__dense-copy p,
.spear-project-detail__media-ledger p,
.spear-project-detail__columns p,
.spear-project-detail__closing-copy p {
  margin: 0;
  color: rgba(205, 226, 235, 0.7);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(9px, 0.62vw, 13px);
  font-weight: 350;
  letter-spacing: 0.015em;
  line-height: 1.72;
}

.spear-project-detail__spec-panel {
  grid-column: 9 / 13;
  padding: calc(var(--spear-detail-unit) * 2);
  border: 1px solid var(--spear-detail-line-strong);
  background:
    linear-gradient(var(--spear-detail-line-faint) 1px, transparent 1px);
  background-size: 100% calc(var(--spear-detail-unit) * 4);
}

.spear-project-detail__spec-panel header {
  display: flex;
  justify-content: space-between;
  gap: var(--spear-detail-unit);
  padding-bottom: calc(var(--spear-detail-unit) * 1.3);
  border-bottom: 1px solid var(--spear-detail-line-strong);
  color: var(--spear-detail-cold);
}

.spear-project-detail__spec-panel p {
  margin: calc(var(--spear-detail-unit) * 2.3) 0 0;
  color: var(--spear-detail-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(9px, 0.55vw, 12px);
  line-height: 1.68;
}

/* 02 keeps its editorial copy readable without enlarging the display headings. */
.spear-project-detail__section--text .spear-project-detail__dense-copy span {
  font-size: clamp(8px, 0.5vw, 10px);
}

.spear-project-detail__section--text .spear-project-detail__dense-copy p {
  font-size: clamp(11px, 0.7vw, 15px);
  line-height: 1.7;
}

.spear-project-detail__section--text .spear-project-detail__spec-panel {
  font-size: clamp(8px, 0.5vw, 10px);
}

.spear-project-detail__section--text .spear-project-detail__spec-panel p {
  font-size: clamp(10px, 0.62vw, 13px);
  line-height: 1.68;
}

.spear-project-detail__line-band {
  grid-column: 1 / 13;
  position: relative;
  height: calc(var(--spear-detail-unit) * 15);
  margin-top: calc(var(--spear-detail-unit) * 3);
  overflow: hidden;
  border-block: 1px solid var(--spear-detail-line);
  background:
    repeating-linear-gradient(
      to right,
      transparent 0 calc(var(--spear-detail-unit) * 3 - 1px),
      var(--spear-detail-line-faint) calc(var(--spear-detail-unit) * 3 - 1px) calc(var(--spear-detail-unit) * 3)
    );
}

.spear-project-detail__line-band > span {
  position: absolute;
  z-index: 2;
  top: calc(var(--spear-detail-unit) * 1.2);
  left: calc(var(--spear-detail-unit) * 1.2);
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: 7px;
  letter-spacing: 0.12em;
}

.spear-project-detail__line-band svg {
  position: absolute;
  inset: calc(var(--spear-detail-unit) * 1.2) 0;
  width: 100%;
  height: calc(100% - var(--spear-detail-unit) * 2.4);
}

.spear-project-detail__line-band line {
  fill: none;
  stroke: var(--spear-detail-line-strong);
  stroke-width: 0.3;
  vector-effect: non-scaling-stroke;
}

.spear-project-detail__media-shell {
  grid-column: 1 / 13;
  position: relative;
  padding: calc(var(--spear-detail-unit) * 2.1);
  border: 1px solid var(--spear-detail-line-strong);
  box-shadow:
    0 0 0 4px #000,
    0 0 0 5px var(--spear-detail-line),
    0 0 0 9px #000,
    0 0 0 10px var(--spear-detail-line-faint);
}

.spear-project-detail__media-shell::before,
.spear-project-detail__media-shell::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.spear-project-detail__media-shell::before {
  inset: -11px 8% -11px 8%;
  border-block: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__media-shell::after {
  inset: 15% -11px;
  border-inline: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__media-ticks {
  position: absolute;
  z-index: 2;
  inset: -7px 0 auto;
  height: 7px;
  background: repeating-linear-gradient(
    to right,
    var(--spear-detail-line-strong) 0 1px,
    transparent 1px calc(var(--spear-detail-unit) * 2)
  );
  mask-image: linear-gradient(to bottom, #000 0 55%, transparent 55%);
}

.spear-project-detail__media {
  position: relative;
  margin: 0;
}

.spear-project-detail__media-field {
  position: relative;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border: 1px solid rgba(184, 219, 233, 0.5);
  background: #000;
}

.spear-project-detail__media-field::after {
  content: "";
  position: absolute;
  inset: calc(var(--spear-detail-unit) * 1.1);
  border: 1px solid rgba(177, 214, 229, 0.28);
  pointer-events: none;
}

.spear-project-detail__checker-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: none;
  filter: none;
}

.spear-project-detail__media figcaption {
  display: flex;
  justify-content: space-between;
  gap: calc(var(--spear-detail-unit) * 3);
  padding-top: calc(var(--spear-detail-unit) * 1.4);
  color: var(--spear-detail-cold);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(8px, 0.5vw, 10px);
  letter-spacing: 0.12em;
}

.spear-project-detail__media-ledger {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: calc(var(--spear-detail-unit) * 4);
  border-top: 1px solid var(--spear-detail-line-strong);
  border-left: 1px solid var(--spear-detail-line);
}

.spear-project-detail__media-ledger article {
  min-height: calc(var(--spear-detail-unit) * 18);
  padding: calc(var(--spear-detail-unit) * 2);
  border-right: 1px solid var(--spear-detail-line);
  border-bottom: 1px solid var(--spear-detail-line);
}

/* 03 uses a larger evidence caption and body tier inside the existing ledger. */
.spear-project-detail__section--media .spear-project-detail__media-ledger span {
  font-size: clamp(8px, 0.5vw, 10px);
}

.spear-project-detail__section--media .spear-project-detail__media-ledger p {
  font-size: clamp(11px, 0.7vw, 15px);
  line-height: 1.7;
}

.spear-project-detail__system-grid {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--spear-detail-line-strong);
  border-left: 1px solid var(--spear-detail-line);
}

.spear-project-detail__system-cell {
  display: grid;
  align-content: space-between;
  min-height: calc(var(--spear-detail-unit) * 22);
  padding: calc(var(--spear-detail-unit) * 2);
  border-right: 1px solid var(--spear-detail-line);
  border-bottom: 1px solid var(--spear-detail-line);
  background: rgba(6, 17, 22, 0.16);
}

.spear-project-detail__system-cell--wide {
  grid-column: span 2;
}

.spear-project-detail__system-cell > strong {
  margin-top: calc(var(--spear-detail-unit) * 2);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(16px, 1.18vw, 25px);
  font-weight: 560;
  letter-spacing: -0.025em;
  line-height: 1.08;
}

.spear-project-detail__system-cell > p {
  max-width: 30em;
  margin: calc(var(--spear-detail-unit) * 1.7) 0 0;
  color: var(--spear-detail-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(9px, 0.55vw, 12px);
  line-height: 1.65;
}

.spear-project-detail__signal-field {
  grid-column: 1 / 13;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  min-height: calc(var(--spear-detail-unit) * 34);
  margin-top: calc(var(--spear-detail-unit) * 4);
  overflow: hidden;
  border: 1px solid var(--spear-detail-line-strong);
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 calc(var(--spear-detail-unit) * 2 - 1px),
      var(--spear-detail-line-faint) calc(var(--spear-detail-unit) * 2 - 1px) calc(var(--spear-detail-unit) * 2)
    );
}

.spear-project-detail__signal-field header {
  position: absolute;
  z-index: 2;
  inset: 0 0 auto;
  display: flex;
  justify-content: space-between;
  padding: calc(var(--spear-detail-unit) * 1.2);
  border-bottom: 1px solid var(--spear-detail-line);
}

.spear-project-detail__signal-field svg {
  position: absolute;
  inset: calc(var(--spear-detail-unit) * 4) 0 0;
  width: 100%;
  height: calc(100% - var(--spear-detail-unit) * 4);
  opacity: 0.88;
}

.spear-project-detail__signal-field > .spear-project-detail__cross-rail {
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
}

.spear-project-detail__signal-field > .spear-project-detail__cross-rail + header {
  z-index: 3;
}

.spear-project-detail__signal-field line {
  stroke: var(--spear-detail-line-strong);
  stroke-width: 0.35;
  vector-effect: non-scaling-stroke;
}

.spear-project-detail__signal-field > div {
  z-index: 2;
  grid-column: 8 / 13;
  align-self: end;
  margin: 0 calc(var(--spear-detail-unit) * 1.5) calc(var(--spear-detail-unit) * 1.5) 0;
  padding: calc(var(--spear-detail-unit) * 1.6);
  border: 1px solid var(--spear-detail-line-strong);
  background: rgba(0, 0, 0, 0.84);
}

.spear-project-detail__signal-field > div > b {
  display: block;
  margin-top: var(--spear-detail-unit);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(15px, 1vw, 22px);
  font-weight: 600;
}

.spear-project-detail__signal-field > div > p {
  margin: calc(var(--spear-detail-unit) * 1.2) 0 0;
  color: var(--spear-detail-muted);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(9px, 0.55vw, 12px);
  line-height: 1.65;
}

.spear-project-detail__columns {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--spear-detail-unit) * 3);
  margin-top: calc(var(--spear-detail-unit) * 4);
  padding-top: calc(var(--spear-detail-unit) * 2);
  border-top: 1px solid var(--spear-detail-line);
}

.spear-project-detail__columns strong {
  color: var(--spear-detail-paper);
  font-weight: 600;
}

.spear-project-detail__closing {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--spear-detail-unit);
  padding-top: calc(var(--spear-detail-unit) * 1.5);
  border-top: 1px solid var(--spear-detail-line-strong);
}

.spear-project-detail__closing > p:first-child {
  grid-column: 1 / 13;
}

.spear-project-detail__closing h2 {
  grid-column: 1 / 13;
  margin: calc(var(--spear-detail-unit) * 2.5) 0 calc(var(--spear-detail-unit) * 4);
  font-family: "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(44px, 4vw, 86px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.92;
}

.spear-project-detail__closing-grid {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: calc(var(--spear-detail-unit) * 3);
  padding: calc(var(--spear-detail-unit) * 2.5);
  border: 1px solid var(--spear-detail-line-strong);
  box-shadow:
    inset 0 0 0 4px #000,
    inset 0 0 0 5px var(--spear-detail-line);
}

.spear-project-detail__closing-copy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--spear-detail-unit) * 2.5);
}

.spear-project-detail__closing-ledger {
  padding-left: calc(var(--spear-detail-unit) * 2);
  border-left: 1px solid var(--spear-detail-line);
}

.spear-project-detail__closing-footer {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: calc(var(--spear-detail-unit) * 2);
  margin-top: calc(var(--spear-detail-unit) * 5);
  padding-block: calc(var(--spear-detail-unit) * 1.5);
  border-block: 1px solid var(--spear-detail-line-strong);
  color: var(--spear-detail-muted);
  font-family: var(--tectonic-ui-small-en, "Bahnschrift", "Arial", sans-serif);
  font-size: clamp(6px, 0.4vw, 8px);
  letter-spacing: 0.12em;
}

.spear-project-detail__closing-footer span:nth-child(2),
.spear-project-detail__closing-footer span:nth-child(3) {
  justify-self: center;
}

.spear-project-detail__closing-footer span:last-child {
  justify-self: end;
}

@supports (animation-timeline: view()) {
  .spear-project-detail__reveal {
    opacity: 0.18;
    transform: translate3d(0, 26px, 0);
    animation: spear-detail-reveal both cubic-bezier(0.4, 0, 0.2, 1);
    animation-timeline: view(block);
    animation-range: entry 4% entry 30%;
  }
}

@keyframes spear-detail-reveal {
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@media (max-width: 1200px) {
  :root {
    --spear-detail-split: 43vw;
  }

  .spear-project-detail__rail {
    padding-inline: 42px 62px;
  }
}

@media (max-width: 820px) {
  :root {
    --spear-detail-split: 20vw;
  }

  .spear-project-detail__rail {
    padding-inline: 28px 42px;
  }

  .spear-project-detail__hero-density,
  .spear-project-detail__closing-grid {
    grid-template-columns: 1fr;
  }

  .spear-project-detail__text-columns {
    grid-template-columns: 1fr;
  }

  .spear-project-detail__editorial-grid {
    row-gap: calc(var(--spear-detail-unit) * 3);
  }

  .spear-project-detail__dense-copy,
  .spear-project-detail__spec-panel {
    grid-column: 1 / 13;
  }

  .spear-project-detail__section-lead {
    grid-column: 1 / 11;
  }

  .spear-project-detail__signal-field > div {
    grid-column: 6 / 13;
  }
}

@media (max-width: 560px) {
  :root {
    --spear-detail-split: 12vw;
  }

  .spear-project-detail__dense-copy,
  .spear-project-detail__media-ledger,
  .spear-project-detail__system-grid,
  .spear-project-detail__columns,
  .spear-project-detail__closing-copy {
    grid-template-columns: 1fr;
  }

  .spear-project-detail__system-cell--wide {
    grid-column: auto;
  }

  .spear-project-detail__handoff h2,
  .spear-project-detail__handoff p {
    grid-column: 1 / 13;
  }

  .spear-project-detail__handoff p {
    margin-top: calc(var(--spear-detail-unit) * 2);
  }

  .spear-project-detail__signal-field > div {
    grid-column: 3 / 13;
  }

  .spear-project-detail__closing-ledger {
    padding: calc(var(--spear-detail-unit) * 2) 0 0;
    border-top: 1px solid var(--spear-detail-line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .spear-project-detail,
  .spear-project-detail__enter,
  .spear-project-detail__reveal {
    animation: none !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
    opacity: 1 !important;
    transform: none !important;
  }
}