body.is-oil-dialog-open {
  overflow: hidden;
}

.research-composition {
  width: min(1120px, 100%);
  display: grid;
  grid-template-columns: minmax(200px, 0.9fr) minmax(340px, 1.35fr) minmax(200px, 0.9fr);
  grid-template-rows: repeat(2, minmax(218px, auto)) auto;
  gap: 16px 22px;
  align-items: stretch;
}

.research-composition .research-grid {
  display: contents;
}

.research-composition .research-grid article:nth-of-type(1) {
  grid-column: 1;
  grid-row: 1;
}

.research-composition .research-grid article:nth-of-type(2) {
  grid-column: 3;
  grid-row: 1;
}

.research-composition .research-grid article:nth-of-type(3) {
  grid-column: 1;
  grid-row: 2;
}

.research-composition .research-grid article:nth-of-type(4) {
  grid-column: 3;
  grid-row: 2;
}

.oil-stage-shell {
  grid-column: 2;
  grid-row: 1 / 3;
  width: 100%;
  margin: 0;
  overflow: hidden;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.oil-constellation {
  position: relative;
  min-height: 452px;
  padding: 44px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 22px;
  isolation: isolate;
}

.oil-constellation.is-enhanced {
  display: block;
  padding: 0;
  perspective: 1300px;
}

.oil-node {
  width: clamp(96px, 10vw, 132px);
  aspect-ratio: 1;
  padding: 0;
  appearance: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  touch-action: manipulation;
}

.oil-constellation.is-enhanced .oil-node {
  position: absolute;
  left: 50%;
  top: 50%;
  will-change: transform, opacity, filter;
}

.oil-interaction-hint {
  z-index: 40;
  max-width: calc(100% - 56px);
}

.oil-interaction-hint[hidden] {
  display: none;
}

.oil-interaction-hint.is-pulsing {
  animation-iteration-count: infinite;
}

.oil-card-face {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(197, 197, 197, 0.62);
  border-radius: 14px;
  box-shadow: 0 5px 8px rgba(29, 36, 31, 0.09);
  transition:
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 220ms ease,
    background-color 220ms ease;
}

.oil-card-face img {
  width: 66%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
}

.oil-card-face > span {
  color: var(--ink);
  font-size: clamp(12px, 1.25vw, 14px);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.oil-node:hover .oil-card-face,
.oil-node:focus-visible .oil-card-face {
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(29, 36, 31, 0.42);
  transform: translateY(-3px) scale(1.045);
}

.oil-node:focus-visible {
  outline: 3px solid var(--forest);
  outline-offset: 5px;
  border-radius: 16px;
}

.oil-research-note {
  grid-column: 1 / -1;
  grid-row: 3;
  width: 100%;
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
  text-wrap: pretty;
}

.oil-dialog {
  width: min(760px, calc(100% - 32px));
  max-height: min(720px, calc(100vh - 32px));
  padding: 0;
  overflow: visible;
  color: var(--ink);
  background: var(--white);
  border: 0;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(13, 30, 25, 0.28);
}

.oil-dialog::backdrop {
  background: rgba(13, 30, 25, 0.58);
  backdrop-filter: blur(6px);
}

.oil-dialog[open] {
  animation: oil-dialog-in 240ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.oil-dialog-layout {
  display: grid;
  grid-template-columns: minmax(230px, 0.85fr) minmax(0, 1.35fr);
  min-height: 420px;
}

.oil-dialog-visual {
  display: grid;
  place-items: center;
  padding: 40px;
  background: rgba(232, 242, 239, 0.48);
  border-radius: 16px 0 0 16px;
}

.oil-dialog-visual img {
  width: min(220px, 100%);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
}

.oil-dialog-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 56px 48px 44px;
}

.oil-dialog-context {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.oil-dialog-content h2 {
  margin: 0;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: clamp(34px, 5vw, 50px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.oil-dialog-description {
  margin: 24px 0 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.85;
  text-wrap: pretty;
}

.oil-dialog-source {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.oil-dialog-action {
  min-height: 44px;
  margin-top: auto;
  padding: 0 20px;
  color: var(--white);
  background: var(--forest);
  border: 0;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
}

.oil-dialog-action:hover,
.oil-dialog-action:focus-visible {
  background: #285247;
}

.oil-dialog-action:focus-visible,
.oil-dialog-close:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

.oil-dialog-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  padding: 0;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.9);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 25px;
  line-height: 1;
  cursor: pointer;
}

@keyframes oil-dialog-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 960px) {
  .research-composition {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: 460px auto auto auto;
    gap: 12px;
  }

  .research-composition .oil-stage-shell {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .research-composition .research-grid article:nth-of-type(1) {
    grid-column: 1;
    grid-row: 2;
  }

  .research-composition .research-grid article:nth-of-type(2) {
    grid-column: 2;
    grid-row: 2;
  }

  .research-composition .research-grid article:nth-of-type(3) {
    grid-column: 1;
    grid-row: 3;
  }

  .research-composition .research-grid article:nth-of-type(4) {
    grid-column: 2;
    grid-row: 3;
  }

  .research-composition .oil-constellation {
    min-height: 460px;
  }

  .research-composition .oil-research-note {
    grid-column: 1 / -1;
    grid-row: 4;
    margin: 8px 0 24px;
  }
}

@media (max-width: 680px) {
  .research-composition {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: 430px auto auto auto;
    gap: 10px;
  }

  .research-composition .oil-stage-shell {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .research-composition .research-grid article:nth-of-type(1) {
    grid-column: 1;
    grid-row: 2;
  }

  .research-composition .research-grid article:nth-of-type(2) {
    grid-column: 2;
    grid-row: 2;
  }

  .research-composition .research-grid article:nth-of-type(3) {
    grid-column: 1;
    grid-row: 3;
  }

  .research-composition .research-grid article:nth-of-type(4) {
    grid-column: 2;
    grid-row: 3;
  }

  .oil-stage-shell {
    margin-top: 0;
  }

  .oil-constellation {
    min-height: 430px;
  }

  .oil-node {
    width: clamp(72px, 20vw, 88px);
  }

  .oil-research-note {
    grid-column: 1 / -1;
    grid-row: 4;
    margin: 8px 0 22px;
    font-size: 12px;
  }

  .oil-dialog-layout {
    display: block;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
  }

  .oil-dialog-visual {
    min-height: 220px;
    padding: 32px;
    border-radius: 16px 16px 0 0;
  }

  .oil-dialog-visual img {
    width: 160px;
  }

  .oil-dialog-content {
    min-height: 360px;
    padding: 34px 28px 30px;
  }

  .oil-dialog-action {
    width: 100%;
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .oil-card-face,
  .oil-dialog[open] {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .oil-interaction-hint.is-visible {
    animation: none;
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}