:root {
  --pf-bg: #f4f8ff;
  --pf-surface: #ffffff;
  --pf-ink: #102341;
  --pf-muted: #4f6280;
  --pf-blue: #1f5fd6;
  --pf-blue-soft: #d9e7ff;
  --pf-line: #d7e3f7;
  --pf-chip: #edf3ff;
}

.page-content {
  background:
    radial-gradient(circle at 15% 0%, rgba(31, 95, 214, 0.12), transparent 30%),
    radial-gradient(circle at 90% 10%, rgba(64, 136, 255, 0.1), transparent 25%),
    var(--pf-bg);
}

.page-content > .wrapper {
  max-width: 1480px;
  padding-left: 24px;
  padding-right: 24px;
}

.perfit-page {
  max-width: 1260px;
  margin: 0 auto;
  color: var(--pf-ink);
  font-family: "Inter", "Avenir Next", "Segoe UI", sans-serif;
  padding: 28px 0 64px;
}

.perfit-page .perfit-hero {
  background: #ffffff;
  border: 1px solid var(--pf-line);
  border-radius: 22px;
  padding: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(23, 76, 164, 0.06);
}

.perfit-page .perfit-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.perfit-page .perfit-back {
  text-decoration: none;
  color: #1e58c8;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.perfit-page .perfit-status {
  padding: 5px 12px;
  font-size: 0.82rem;
  background: var(--pf-chip);
  border: 1px solid #bfd5ff;
  border-radius: 999px;
  color: #1e56b4;
  font-weight: 600;
}

.perfit-page .perfit-title-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
}

.perfit-page .perfit-title-icon {
  width: 76px;
  height: 76px;
  object-fit: contain;
  flex: 0 0 auto;
}

.perfit-page h1 {
  margin: 0;
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.perfit-page .perfit-title-word {
  font-family: "Times New Roman", "Times", "Nimbus Roman No9 L", serif;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.perfit-page .perfit-subtitle {
  margin: 14px 0 32px;
  color: #1f5fd6;
  font-size: 1.05rem;
  text-align: left;
  line-height: 1.85;
  margin-left: 90px;
}

.perfit-page .perfit-meta {
  margin-top: 24px;
}

.perfit-page .perfit-authors,
.perfit-page .perfit-affiliations {
  margin: 0;
}

.perfit-page .perfit-meta-label {
  display: inline-block;
  min-width: 92px;
  margin-right: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #2f61b4;
}

.perfit-page .perfit-authors {
  color: #1f365b;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.9;
}

.perfit-page .perfit-affiliations {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed #d7e4f8;
  color: #5d7292;
  font-size: 0.93rem;
  line-height: 1.9;
}

.perfit-page .perfit-links {
  margin-top: 16px;
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

.perfit-page .pf-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 8px 14px;
  border: 1px solid #9fbeef;
  transition: all 0.2s ease;
}

.perfit-page .pf-btn-primary {
  background: var(--pf-blue);
  color: #fff;
  border-color: var(--pf-blue);
}

.perfit-page .pf-btn-ghost {
  background: #fff;
  color: #245fc8;
}

.perfit-page .pf-btn:hover {
  transform: translateY(-1px);
}

.perfit-page .pf-btn-icon {
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.perfit-page .perfit-teaser {
  margin-top: 16px;
  border: 1px solid var(--pf-line);
  border-radius: 14px;
  background: #ffffff;
  padding: 14px;
}

.perfit-page .perfit-teaser img {
  display: block;
  width: 100%;
  max-width: 920px;
  max-height: 380px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid #d7e6ff;
  background: #fff;
}

.perfit-page .perfit-figure-note {
  margin: 8px 0 0;
  text-align: center;
  color: #4a6592;
  font-size: 0.88rem;
}

.perfit-page .perfit-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.perfit-page .perfit-stat {
  background: #fff;
  border: 1px solid var(--pf-line);
  border-radius: 12px;
  padding: 12px;
}

.perfit-page .perfit-stat h3 {
  margin: 0 0 4px;
  color: #1e4f9f;
  font-size: 0.9rem;
}

.perfit-page .perfit-stat p {
  margin: 0;
  color: #345079;
  font-size: 0.95rem;
  line-height: 1.55;
}

.perfit-page section {
  margin-top: 22px;
  background: #fff;
  border: 1px solid var(--pf-line);
  border-radius: 16px;
  padding: 18px;
}

.perfit-page h2 {
  margin: 0 0 10px;
  color: #143d7f;
  font-size: 1.3rem;
  border: 0;
  padding: 0;
}

.perfit-page p,
.perfit-page li {
  color: #30496f;
  line-height: 1.85;
}

.perfit-page ul {
  margin: 0;
  padding-left: 1.25em;
}

.perfit-page .perfit-observation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1.18fr);
  grid-template-areas: "lowrank shift";
  gap: 16px;
  align-items: start;
}

.perfit-page .perfit-observation-lowrank {
  grid-area: lowrank;
}

.perfit-page .perfit-observation-shift {
  grid-area: shift;
}

.perfit-page .perfit-observation {
  background: #fbfdff;
  border: 1px solid #d7e3f7;
  border-radius: 12px;
  padding: 12px;
  min-width: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.perfit-page .perfit-observation h3 {
  margin: 0 0 6px;
  color: #1e4f9f;
  font-size: 1rem;
}

.perfit-page .perfit-observation p {
  margin: 0 0 10px;
}

.perfit-page .perfit-observation-intro {
  margin: 0 0 14px;
  color: #2c4568;
}

.perfit-page .perfit-observation-note {
  margin-top: 10px;
  color: #4a658f;
  font-size: 0.9rem;
}

.perfit-page .perfit-observation-figure {
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.perfit-page .perfit-observation-figure img {
  max-height: 390px;
  width: 86%;
  margin: 0 auto;
  height: auto;
  object-fit: contain;
  border: 0;
  border-radius: 8px;
  background: transparent;
}

.perfit-page .perfit-observation-figure figcaption {
  margin-top: 8px;
  color: #425e8b;
  font-size: 0.9rem;
  line-height: 1.45;
}

.perfit-page .perfit-observation-table {
  flex: 1;
  min-width: 0;
}

.perfit-page .perfit-observation .perfit-results {
  min-width: 0;
  max-width: 100%;
}

.perfit-page .perfit-observation-table table {
  min-width: 0;
  table-layout: fixed;
  font-size: 0.88rem;
}

.perfit-page .perfit-observation-table th,
.perfit-page .perfit-observation-table td {
  padding: 7px 8px;
  white-space: nowrap;
}

.perfit-page .perfit-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.perfit-page .perfit-card {
  background: #f9fbff;
  border: 1px solid var(--pf-line);
  border-radius: 12px;
  padding: 12px;
}

.perfit-page .perfit-card h3 {
  margin: 0 0 6px;
  font-size: 0.96rem;
  color: #1f4e9a;
}

.perfit-page .perfit-card p {
  margin: 0;
  font-size: 0.93rem;
}

.perfit-page .perfit-method-figure {
  margin-top: 12px;
}

.perfit-page .perfit-method-figure img {
  max-height: 520px;
}

.perfit-page .perfit-results {
  overflow-x: auto;
  border: 1px solid var(--pf-line);
  border-radius: 12px;
  background: #fff;
}

.perfit-page table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

.perfit-page th,
.perfit-page td {
  padding: 10px 12px;
  border-bottom: 1px solid #e5edf9;
  text-align: left;
}

.perfit-page th {
  color: #2055ab;
  background: #f4f8ff;
  font-weight: 700;
}

.perfit-page tr:last-child td {
  border-bottom: 0;
}

.perfit-page .best {
  color: #18489b;
  font-weight: 700;
}

.perfit-page .perfit-visual-stack {
  display: grid;
  gap: 14px;
  max-width: 1080px;
  margin: 0 auto;
}

.perfit-page .perfit-figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.perfit-page .perfit-figure-card {
  margin: 0;
  border: 1px solid var(--pf-line);
  border-radius: 12px;
  background: #fbfdff;
  padding: 10px;
}

.perfit-page .perfit-figure-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #1e53ac;
  border: 1px solid #bfd5ff;
  border-radius: 999px;
  background: #eef4ff;
}

.perfit-page .perfit-figure-card img {
  display: block;
  width: 100%;
  max-height: 300px;
  height: auto;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid #dce8fb;
  background: #fff;
}

.perfit-page .perfit-figure-card figcaption {
  margin-top: 8px;
  color: #425e8b;
  font-size: 0.9rem;
  line-height: 1.45;
}

.perfit-page .perfit-cite-wrap {
  border: 1px solid var(--pf-line);
  border-radius: 12px;
  background: #fbfdff;
}

.perfit-page .perfit-cite-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid #e4ecfb;
}

.perfit-page .perfit-copy {
  border: 1px solid #97b6ef;
  background: #fff;
  color: #1a4c9f;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-weight: 600;
}

.perfit-page .perfit-copy:hover {
  background: #f2f7ff;
}

.perfit-page pre {
  margin: 0;
  padding: 12px;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.55;
  background: transparent;
}

.perfit-page .perfit-footer {
  margin-top: 14px;
  color: #5b739c;
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 900px) {
  .perfit-page .perfit-grid,
  .perfit-page .perfit-cards,
  .perfit-page .perfit-figure-grid {
    grid-template-columns: 1fr;
  }

  .perfit-page .perfit-observation-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "lowrank"
      "shift";
  }

  .perfit-page .perfit-observation-figure img {
    min-height: auto;
    max-height: 420px;
  }

  .perfit-page .perfit-title-icon {
    width: 62px;
    height: 62px;
  }

  .perfit-page .perfit-subtitle {
    margin-left: 76px;
  }
}

@media (max-width: 640px) {
  .page-content > .wrapper {
    padding-left: 12px;
    padding-right: 12px;
  }

  .perfit-page {
    padding: 16px 0 34px;
  }

  .perfit-page .perfit-hero {
    padding: 16px;
    border-radius: 14px;
  }

  .perfit-page .perfit-title-row {
    align-items: flex-start;
  }

  .perfit-page .perfit-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .perfit-page section {
    padding: 14px;
    border-radius: 14px;
  }
}