* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  color-scheme: light;
  --bg: #f5f8fc;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --surface-blue: #edf6ff;
  --text: #172033;
  --muted: #5d6b82;
  --subtle: #7b8798;
  --line: #dce7f3;
  --line-strong: #bfd5eb;
  --primary: #1f5eff;
  --primary-dark: #173d9d;
  --teal: #02a7a0;
  --green: #15845b;
  --amber: #b9770e;
  --purple: #7454d3;
  --shadow-sm: 0 10px 30px rgba(27, 45, 78, 0.08);
  --shadow-md: 0 22px 70px rgba(25, 63, 120, 0.14);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --font-serif: "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --font-sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% -5%, rgba(31, 94, 255, 0.16), transparent 34rem),
    radial-gradient(circle at 88% 4%, rgba(2, 167, 160, 0.14), transparent 32rem),
    linear-gradient(180deg, #f4f8ff 0%, #f8fbfd 44%, #f5f7fb 100%);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  border-radius: 999px;
  background: var(--primary-dark);
  color: #fff;
  padding: 10px 14px;
  text-decoration: none;
  font-family: var(--font-sans);
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 16px;
}

.hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 24px 42px;
}

.topbar {
  position: static;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  margin: 0 auto 22px;
  border: 1px solid rgba(190, 207, 225, 0.72);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  padding: 10px 14px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-sans);
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  color: var(--primary-dark);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.nav-links {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.nav-links a {
  border-radius: 999px;
  color: #46546b;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 12px;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav-links a:hover {
  background: #eef5ff;
  color: var(--primary-dark);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(161, 190, 224, 0.72);
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(238, 247, 255, 0.94) 48%, rgba(235, 255, 250, 0.92) 100%);
  padding: 58px 42px 46px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.hero-panel::before,
.hero-panel::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
}

.hero-panel::before {
  width: 360px;
  height: 360px;
  right: -110px;
  top: -150px;
  background: radial-gradient(circle, rgba(31, 94, 255, 0.18), transparent 68%);
}

.hero-panel::after {
  width: 420px;
  height: 420px;
  left: -180px;
  bottom: -210px;
  background: radial-gradient(circle, rgba(2, 167, 160, 0.18), transparent 68%);
}

.hero-panel > * {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker,
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(31, 94, 255, 0.18);
  border-radius: 999px;
  background: rgba(237, 246, 255, 0.82);
  color: var(--primary-dark);
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: 22px;
  padding: 10px 14px;
}

.section-kicker {
  margin-bottom: 12px;
  padding: 8px 12px;
}

.pill {
  margin-bottom: 14px;
  padding: 8px 10px;
}

.hero-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 14px;
}

.logo {
  width: 82px;
  height: 82px;
  object-fit: contain;
  filter: drop-shadow(0 12px 20px rgba(31, 94, 255, 0.16));
}

h1,
h2,
h3 {
  color: #101828;
  font-family: var(--font-serif);
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.45rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.subtitle {
  max-width: 980px;
  margin: 0 auto 22px;
  color: #28364c;
  font-size: clamp(1.25rem, 2.8vw, 1.82rem);
  font-weight: 500;
  line-height: 1.35;
}

.authors,
.affiliations,
.contribution-note,
.hero-summary {
  max-width: 1050px;
  margin-left: auto;
  margin-right: auto;
}

.authors {
  margin-bottom: 12px;
  color: #3a4658;
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.75;
}

.affiliations {
  color: #205170;
  font-size: 1rem;
  font-weight: 600;
}

.contribution-note {
  margin-top: 6px;
  color: var(--subtle);
  font-size: 0.9rem;
}

.authors sup,
.affiliations sup,
.contribution-note sup {
  color: var(--primary);
  font-size: 0.7em;
  font-weight: 700;
  line-height: 0;
  vertical-align: super;
}

.hero-summary {
  margin-top: 28px;
  color: #2d3b50;
  font-size: 1.17rem;
  line-height: 1.78;
  text-align: left;
}

.mark {
  font-weight: 700;
}

.mark-blue { color: var(--primary-dark); }
.mark-green { color: var(--green); }
.mark-orange { color: var(--amber); }
.mark-purple { color: var(--purple); }

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 940px;
  margin: 30px auto 28px;
}

.hero-metrics div {
  border: 1px solid rgba(172, 198, 229, 0.74);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
  padding: 18px 14px;
  box-shadow: 0 10px 26px rgba(32, 72, 134, 0.06);
}

.hero-metrics strong {
  display: block;
  color: var(--primary-dark);
  font-family: var(--font-sans);
  font-size: 2.05rem;
  line-height: 1;
}

.hero-metrics span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.93rem;
  font-weight: 600;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn {
  min-width: 128px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1;
  padding: 14px 20px;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #19a6ff);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(31, 94, 255, 0.22);
}

.btn-secondary {
  background: linear-gradient(135deg, #0e8f88, #15b3aa);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(2, 167, 160, 0.2);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.75);
  color: var(--primary-dark);
}

.section,
.figure-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 42px 24px;
}

.section-narrow {
  padding-top: 28px;
}

.section-heading {
  max-width: 850px;
  margin: 0 auto 24px;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.018em;
}

.section-heading p,
.prose p,
.note {
  color: var(--muted);
  font-size: 1.08rem;
}

.prose p {
  margin-bottom: 16px;
}

.card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(207, 221, 237, 0.92);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.86);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(31, 94, 255, 0.25);
  box-shadow: 0 18px 46px rgba(28, 65, 118, 0.12);
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
  font-weight: 700;
}

.card p,
.card li {
  color: #46546b;
  font-size: 0.98rem;
  line-height: 1.68;
}

.card ul {
  margin: 12px 0 0 18px;
}

.card-index {
  display: inline-flex;
  margin-bottom: 18px;
  color: rgba(31, 94, 255, 0.42);
  font-family: var(--font-sans);
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1;
}

.feature-grid,
.three-grid,
.four-grid,
.category-grid,
.analysis-list,
.result-grid,
.tables-grid,
.tables-stack,
.strategy-grid {
  display: grid;
  gap: 16px;
}

.feature-grid,
.four-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.three-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.strategy-grid,
.result-grid,
.analysis-list,
.tables-grid,
.category-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tables-stack {
  grid-template-columns: 1fr;
  max-width: 880px;
  margin: 0 auto;
}

.contribution-card {
  border-top: 4px solid var(--primary);
}

.contribution-card:nth-child(2) { border-top-color: var(--teal); }
.contribution-card:nth-child(3) { border-top-color: var(--purple); }

.table-wrap {
  width: 100%;
  margin: 22px 0 16px;
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  min-width: 880px;
  border-collapse: collapse;
  background: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.98rem;
}

caption {
  padding: 14px 16px 0;
  color: var(--subtle);
  font-size: 0.92rem;
  text-align: left;
}

th,
td {
  border-bottom: 1px solid #e9eff6;
  padding: 13px 14px;
  text-align: center;
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: linear-gradient(180deg, #eaf3ff, #deecff);
  color: var(--primary-dark);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

td:nth-child(2),
th:nth-child(2) {
  text-align: left;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: #f7fbff;
}

.leader {
  background: linear-gradient(90deg, rgba(31, 94, 255, 0.08), rgba(2, 167, 160, 0.05));
}

.note {
  max-width: 940px;
  margin: 0 auto;
  text-align: center;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 24px;
  align-items: center;
}

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

.stat {
  border: 1px solid rgba(172, 198, 229, 0.85);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #edf6ff 100%);
  padding: 22px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat strong {
  display: block;
  color: var(--primary-dark);
  font-family: var(--font-sans);
  font-size: 2.25rem;
  line-height: 1.05;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.35;
}

.category {
  border-left: 5px solid var(--primary);
}

.category:nth-child(2) { border-left-color: var(--green); }
.category:nth-child(3) { border-left-color: var(--amber); }
.category:nth-child(4) { border-left-color: var(--purple); }
.category:nth-child(5) { border-left-color: #6b7280; }

.category-wide {
  grid-column: span 2;
}

.category-results {
  margin: 0 0 16px;
}

.category-results th:first-child,
.category-results td:first-child {
  text-align: left;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: steps;
}

.timeline-card {
  min-height: 100%;
}

.timeline-card span {
  display: inline-flex;
  margin-bottom: 14px;
  border-radius: 999px;
  background: #edf6ff;
  color: var(--primary-dark);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 7px 10px;
}

.strategy-card {
  border-top: 5px solid var(--primary);
}

.strategy-card.accent {
  border-top-color: var(--teal);
}

.finding {
  border-left: 5px solid var(--green);
}

.finding:nth-child(2) { border-left-color: var(--primary); }
.finding:nth-child(3) { border-left-color: var(--purple); }
.finding:nth-child(4) { border-left-color: var(--amber); }

figure {
  margin: 0;
}

.figure-section figure,
.embedded-table {
  overflow: hidden;
  border: 1px solid rgba(207, 221, 237, 0.92);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.82);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.figure-section img,
.embedded-table img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

figcaption {
  max-width: 1010px;
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.58;
  text-align: center;
}

.embedded-table figcaption {
  margin: 0 auto 14px;
}

.experimental-table {
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
}

.table-image-scroll {
  display: flex;
  justify-content: center;
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  background: #ffffff;
}

.table-image-scroll img {
  display: block;
  width: min(100%, 760px);
  max-width: none;
}

.table5-image {
  width: min(100%, 760px);
}

.experimental-table .note {
  margin-top: 16px;
  font-size: 1rem;
  line-height: 1.62;
}

pre.bibtex {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: #0f172a;
  color: #e6edf7;
  font-family: var(--font-mono);
  font-size: 0.94rem;
  line-height: 1.58;
  padding: 22px;
  white-space: pre;
  box-shadow: var(--shadow-sm);
}

.details-card {
  border: 1px solid rgba(207, 221, 237, 0.92);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-sm);
}

.details-card summary {
  cursor: pointer;
  color: var(--primary-dark);
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 700;
  padding: 20px 24px;
}

.details-card summary::marker {
  color: var(--teal);
}

.details-grid {
  padding: 0 22px 22px;
}

.footer {
  max-width: 1160px;
  margin: 42px auto 0;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 0.98rem;
  padding: 28px 24px 36px;
  text-align: center;
}

@media (max-width: 1060px) {
  .feature-grid,
  .four-grid,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .three-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .hero {
    padding: 18px 16px 32px;
  }

  .topbar {
    width: 100%;
    align-items: flex-start;
    border-radius: 22px;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero-panel {
    border-radius: 26px;
    padding: 42px 24px 34px;
  }

  .hero-title {
    flex-direction: column;
    gap: 12px;
  }

  .logo {
    width: 70px;
    height: 70px;
  }

  .hero-summary {
    font-size: 1.02rem;
  }

  .hero-metrics,
  .stats-grid,
  .strategy-grid,
  .result-grid,
  .analysis-list,
  .category-grid,
  .tables-grid,
  .feature-grid,
  .four-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .category-wide {
    grid-column: auto;
  }

  .section,
  .figure-section {
    padding: 34px 16px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .hero-panel {
    padding: 34px 18px 28px;
  }

  .authors,
  .affiliations {
    font-size: 0.92rem;
  }

  .buttons {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
  }

  .card,
  .figure-section figure,
  .embedded-table {
    border-radius: 18px;
    padding: 18px;
  }
}