:root {
  color-scheme: light;
  --ink: #172126;
  --muted: #627078;
  --line: #dce4e3;
  --surface: #ffffff;
  --soft: #f5f8f7;
  --teal: #0b8f88;
  --teal-dark: #076c67;
  --amber: #d89018;
  --red: #b83d3d;
  --graphite: #2d3a40;
  --radius: 8px;
  font-family: "Segoe UI", "Noto Sans TC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  line-height: 1.6;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
  padding: 0 28px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
  color: var(--ink);
  font-weight: 700;
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--teal);
  color: #fff;
  font-size: 16px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  padding: 9px 10px;
  color: var(--graphite);
  border-radius: 7px;
  font-size: 14px;
}

.nav a:hover,
.nav a[aria-current="page"] {
  background: #e9f4f3;
  color: var(--teal-dark);
  text-decoration: none;
}

.hero {
  min-height: clamp(560px, 78vh, 740px);
  display: grid;
  align-items: center;
  background-image: url("/assets/knowledge-crawler-dashboard.png");
  background-size: cover;
  background-position: center right;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.56);
}

.hero-content {
  position: relative;
  max-width: 1120px;
  width: 100%;
  margin: 0 auto;
  padding: 64px 28px 96px;
}

.hero-copy {
  max-width: 610px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.18;
}

h1 {
  margin: 0;
  font-size: clamp(38px, 7vw, 72px);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 4vw, 40px);
}

h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.lead {
  margin: 18px 0 0;
  max-width: 620px;
  color: #34444b;
  font-size: clamp(17px, 2vw, 21px);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
}

.button.primary {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}

.button:hover {
  text-decoration: none;
  border-color: var(--teal);
}

.section {
  padding: 56px 28px;
}

.section.white {
  background: var(--surface);
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
}

.intro-grid,
.feature-grid,
.metric-grid {
  display: grid;
  gap: 16px;
}

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

.feature-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.item,
.metric,
.endpoint,
.status-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.visual-card {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.visual-card img,
.feature-image {
  display: block;
  width: 100%;
  height: auto;
}

.visual-card .content {
  padding: 20px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 24px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.feature-showcase:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.feature-showcase:nth-of-type(even) {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.feature-showcase:nth-of-type(even) .feature-copy {
  order: 2;
}

.feature-showcase:nth-of-type(even) .visual-card {
  order: 1;
}

.section.white .item,
.section.white .metric,
.section.white .endpoint,
.section.white .status-panel,
.section.white .visual-card {
  background: #fbfdfc;
}

.item p,
.endpoint p,
.status-panel p {
  margin: 0;
  color: var(--muted);
}

.metric strong {
  display: block;
  font-size: 28px;
  line-height: 1.1;
}

.metric span {
  color: var(--muted);
  font-size: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #edf5f4;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 700;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  background: var(--amber);
}

.status-dot.ok {
  background: var(--teal);
}

.status-dot.warn {
  background: var(--amber);
}

.status-dot.danger {
  background: var(--red);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  align-items: start;
}

.code-block {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid #cfd8d7;
  background: #172126;
  color: #ecf5f3;
  padding: 18px;
  font-size: 14px;
}

code {
  font-family: "Cascadia Code", Consolas, monospace;
}

.endpoint {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.method {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 30px;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--graphite);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
}

.method.post {
  background: var(--amber);
  color: #2a1b03;
}

.dashboard {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.stack {
  display: grid;
  gap: 16px;
}

.source-list {
  display: grid;
  gap: 10px;
}

.source-row {
  display: grid;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.source-row small {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.footer {
  padding: 28px;
  background: #172126;
  color: #d7e3e1;
}

.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer a {
  color: #9fe4dc;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

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

  .hero {
    min-height: 620px;
    background-position: center;
  }

  .hero::before {
    background: rgba(255, 255, 255, 0.72);
  }

  .intro-grid,
  .feature-grid,
  .metric-grid,
  .showcase-grid,
  .feature-showcase,
  .split,
  .dashboard {
    grid-template-columns: 1fr;
  }

  .feature-showcase:nth-of-type(even) .feature-copy,
  .feature-showcase:nth-of-type(even) .visual-card {
    order: initial;
  }

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