:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-alt: #eef3fb;
  --text: #1a2333;
  --text-soft: #51607a;
  --line: #d9e1ef;
  --dbp-blue: #2d4b8f;
  --dbp-blue-2: #3e67bf;
  --dbp-orange: #f08c2e;
  --dbp-cyan: #0f8fa6;
  --ok: #2d8f57;
  --warn: #d47d14;
  --radius: 14px;
  --shadow: 0 8px 24px rgba(45, 75, 143, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at 10% -20%, #dce7fb 0%, var(--bg) 34%, var(--bg) 100%);
  color: var(--text);
  font-family: "Manrope", "IBM Plex Sans", "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(246, 248, 251, 0.9);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand-mark {
  width: 30px;
  height: 30px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-soft);
}

.nav-links a {
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--dbp-blue);
  background: var(--surface-alt);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  color: var(--text-soft);
}

main {
  padding: 0.4rem 0 3.2rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1.2rem;
  align-items: stretch;
  margin-bottom: 1.2rem;
}

.landing-intro {
  max-width: 860px;
  margin: 0 auto 0.1rem;
  text-align: center;
}

.landing-intro h1 {
  margin-top: 0;
}

.landing-intro .lead {
  margin: 0.7rem auto 0;
  max-width: 760px;
}

.landing-viz {
  max-width: 940px;
  margin: 0 auto;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 1.8rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: 999px;
  border: 1px solid #b7c8ef;
  color: var(--dbp-blue);
  background: #e9f0fe;
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  margin-top: 0.9rem;
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
}

.lead {
  color: var(--text-soft);
  margin: 0.9rem 0 1.2rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid transparent;
  min-height: 40px;
  padding: 0 0.95rem;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(120deg, var(--dbp-blue) 0%, var(--dbp-blue-2) 100%);
  color: #fff;
}

.btn.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--text);
}

.stats-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}

.stats {
  margin: 0.6rem auto 0;
}

.stat-cell {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 1rem;
}

.stat-cell b {
  display: block;
  font-size: 1.35rem;
  color: var(--dbp-blue);
}

.stat-cell span {
  color: var(--text-soft);
  font-size: 0.82rem;
}

.stat {
  padding: 1rem;
}

.stat strong {
  display: block;
  font-size: 1.35rem;
  color: var(--dbp-blue);
}

.stat span {
  color: var(--text-soft);
  font-size: 0.82rem;
}

.hero-viz {
  padding: 0;
  position: relative;
}

.graph-card {
  position: relative;
  background: transparent;
  border: none;
  border-radius: 0;
  height: 510px;
  overflow: hidden;
}

.graph-card .hint {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.74rem;
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.graph-card .hint .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--dbp-blue);
}

.graph-card .viz-note {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: 0.74rem;
  color: var(--text-soft);
  background: transparent;
  border: none;
  padding: 0;
}

#graph {
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.node-label {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-weight: 600;
  pointer-events: none;
}

.tooltip {
  position: absolute;
  pointer-events: none;
  background: #1a2333;
  color: #fff;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  font-size: 0.78rem;
  transform: translate(-50%, -115%);
  opacity: 0;
  transition: opacity 120ms ease;
  z-index: 5;
  max-width: 220px;
}

.tooltip b {
  display: block;
  font-size: 0.82rem;
}

.tooltip .note {
  display: block;
  color: #c7d1e8;
  font-size: 0.68rem;
  margin-top: 0.2rem;
}

.graph-card .panel {
  position: absolute;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100%;
  background: var(--surface);
  border-left: 1px solid var(--line);
  padding: 0.9rem;
  transition: right 220ms ease;
  z-index: 6;
  overflow-y: auto;
}

.graph-card .panel.open {
  right: 0;
}

.graph-card .panel .close {
  position: absolute;
  top: 0.45rem;
  right: 0.5rem;
  border: none;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
}

.graph-card .panel .tag {
  display: inline-block;
  margin-top: 0.2rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
}

.graph-card .panel h3 {
  margin-top: 0.6rem;
  font-size: 1rem;
}

.graph-card .panel .desc {
  color: var(--text-soft);
  font-size: 0.82rem;
  margin: 0.4rem 0 0.7rem;
}

.graph-card .panel dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

.graph-card .panel dt {
  color: var(--text-soft);
}

.graph-card .panel dd {
  margin: 0;
  font-weight: 600;
}

.graph-card .panel .actions {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.viz-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
  padding: 0.5rem 0.5rem 0;
}

.viz-head p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.85rem;
}

#kg-map {
  width: 100%;
  height: 320px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.4rem;
  padding: 0 0.4rem 0.4rem;
}

.legend-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.74rem;
  color: var(--text-soft);
  background: #fff;
}

.section-grid {
  margin-top: 1.3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.panel-card {
  padding: 1rem 1rem 0.25rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.panel-head h2 {
  font-size: 1.18rem;
}

.panel-head a {
  color: var(--dbp-blue);
  font-size: 0.86rem;
  font-weight: 700;
}

.list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list-item {
  border-top: 1px solid var(--line);
  padding: 0.7rem 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.7rem;
  align-items: center;
}

.list-item:first-child {
  border-top: none;
}

.rank {
  color: var(--text-soft);
  font-weight: 700;
  font-size: 0.8rem;
  width: 1.4rem;
}

.name {
  font-weight: 700;
  font-size: 0.92rem;
}

.meta {
  color: var(--text-soft);
  font-size: 0.78rem;
}

.value {
  font-weight: 700;
  color: var(--dbp-blue);
  font-size: 0.84rem;
}

.catalog-panel {
  margin-bottom: 0.9rem;
  padding: 1.1rem 1.25rem 1.2rem;
}

.catalog-panel .panel-head {
  gap: 1rem;
}

.catalog-panel .value {
  flex-shrink: 0;
  padding-left: 0.75rem;
}

.catalog-panel .lead {
  margin: 0.15rem 0 0.9rem;
}

.controls {
  display: grid;
  grid-template-columns: minmax(16rem, 26rem) minmax(12rem, 0.45fr);
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.input,
.select {
  width: 100%;
  min-height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 0 0.75rem;
  font: inherit;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.kg-card {
  padding: 0.9rem;
  display: grid;
  gap: 0.5rem;
}

.domain-tag {
  display: inline-flex;
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  width: fit-content;
  color: #fff;
}

.kg-card h3 {
  font-size: 1rem;
}

.kg-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.84rem;
}

.kg-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
}

.detail {
  padding: 1rem;
}

.kv {
  margin-top: 0.8rem;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.kv div {
  border-bottom: 1px solid var(--line);
  padding: 0.7rem 0;
  font-size: 0.85rem;
}

.kv div:nth-child(odd) {
  color: var(--text-soft);
}

.detail .lead p {
  margin: 0.5rem 0;
}

.detail .lead ul {
  margin: 0.45rem 0 0.7rem;
  padding-left: 1.2rem;
}

.detail .lead code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: #eef3fb;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.05rem 0.3rem;
}

.detail .lead a {
  color: var(--dbp-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.detail .lead a:hover {
  color: var(--dbp-blue-2);
}

.code-block {
  position: relative;
  margin: 0.8rem 0 0.2rem;
}

.code-block pre {
  margin: 0;
  padding: 0.95rem 1rem;
  border: 1px solid #bfcbe0;
  border-radius: 12px;
  background: #f4f7fd;
  color: #1a2333;
  overflow-x: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.code-block code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.55;
  white-space: pre;
}

.code-block .code-copy {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
}

.detail .lead .md-table-wrap {
  overflow-x: auto;
  margin: 0.65rem 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.detail .lead .md-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.detail .lead .md-table th,
.detail .lead .md-table td {
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  padding: 0.5rem 0.6rem;
  vertical-align: top;
}

.detail .lead .md-table th:last-child,
.detail .lead .md-table td:last-child {
  border-right: none;
}

.detail .lead .md-table th {
  text-align: left;
  font-weight: 700;
  color: var(--text);
  background: #f4f7fd;
}

.detail .lead .md-table tr:last-child td {
  border-bottom: none;
}

.callout {
  border-left: 4px solid var(--dbp-orange);
  background: #fff8ef;
  padding: 0.8rem;
  color: #6e4a20;
  border-radius: 8px;
}

.steps {
  margin: 0.7rem 0 0;
  padding-left: 1rem;
  color: var(--text-soft);
}

.steps li {
  margin-bottom: 0.45rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.84rem;
  padding: 1.4rem 0;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (max-width: 980px) {
  .hero,
  .section-grid,
  .kg-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 740px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .controls,
  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card,
.kg-card,
.list-item {
  animation: riseIn 320ms ease;
}