:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #090a0c;
  --muted: #585f66;
  --soft: #f5f7f8;
  --line: #d9dee2;
  --line-strong: #121416;
  --cyan: #00a6cf;
  --cyan-dark: #007b99;
  --amber: #f29a00;
  --amber-soft: #fff4df;
  --code: #031011;
  --shadow: 0 18px 45px rgba(7, 12, 18, 0.08);
  --radius: 8px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  --serif: Georgia, "Noto Serif TC", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    var(--bg);
  background-size: 56px 56px;
  background-position: -1px -1px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background: rgba(255, 255, 255, 0.86);
}

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

a:hover {
  color: var(--cyan-dark);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
}

.site-header .site-shell {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 760;
  font-size: 1.08rem;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 3px solid var(--ink);
  font-family: var(--serif);
  font-size: 1.35rem;
  line-height: 1;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  border-bottom: 3px solid transparent;
}

.nav-link svg,
.icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
  fill: none;
}

.hero {
  padding: 68px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(410px, 0.98fr);
  gap: 38px;
  align-items: start;
}

.hero-copy h1 {
  margin: 0;
  max-width: 680px;
  font-size: 4.6rem;
  line-height: 1.02;
  font-weight: 820;
  letter-spacing: 0;
}

.split-line {
  margin: 22px 0 0;
  font-size: 2.5rem;
  line-height: 1.18;
  font-weight: 760;
}

.split-line span:last-child {
  color: var(--amber);
}

.hero-copy .lead {
  margin: 20px 0 0;
  max-width: 560px;
  color: var(--muted);
  font-size: 1.22rem;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 0;
}

.button {
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  gap: 12px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 0 20px;
  box-shadow: 5px 5px 0 var(--cyan);
  background: var(--ink);
  color: #ffffff;
  font-weight: 760;
}

.button.secondary {
  box-shadow: 5px 5px 0 var(--amber);
  background: var(--bg);
  color: var(--ink);
}

.button:hover {
  color: #ffffff;
  transform: translateY(-1px);
}

.button.secondary:hover {
  color: var(--ink);
}

.status-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 48px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.74);
}

.status-rail span {
  min-width: 0;
  padding: 15px 18px;
  border-left: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-rail span:first-child {
  border-left: 0;
}

.status-rail strong {
  color: var(--cyan-dark);
  font-weight: 700;
}

.hero-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 178px;
  gap: 12px;
}

.agent-console {
  border: 1px solid var(--line);
  background: var(--bg);
  box-shadow: var(--shadow);
}

.panel-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  border-bottom: 1px solid var(--line);
  padding: 0 16px;
  color: var(--cyan-dark);
  font-family: var(--mono);
  font-size: 0.79rem;
  font-weight: 760;
  text-transform: uppercase;
}

.panel-label.human {
  color: var(--amber);
}

.console-body {
  min-height: 344px;
  padding: 22px;
  background: var(--code);
  color: #40e2ff;
  font-family: var(--mono);
  font-size: 0.93rem;
  line-height: 1.74;
  overflow: auto;
}

.console-body span {
  color: #ffffff;
}

.signal-chart {
  display: grid;
  height: 96px;
  align-items: end;
  grid-template-columns: repeat(15, 1fr);
  gap: 5px;
  padding: 12px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    #ffffff;
  background-size: 18px 18px;
}

.signal-chart i {
  display: block;
  height: var(--h);
  min-height: 8px;
  border-radius: 3px 3px 0 0;
  background: var(--cyan);
}

.human-rail {
  border: 1px solid var(--line);
  background: var(--bg);
}

.human-item {
  display: grid;
  min-height: 109px;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 14px;
}

.human-item:first-of-type {
  border-top: 0;
}

.human-item strong {
  display: block;
  font-size: 0.95rem;
}

.human-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
}

.section {
  padding: 64px 0;
}

.section-head {
  display: grid;
  grid-template-columns: 210px 1fr auto;
  gap: 24px;
  align-items: end;
  margin-bottom: 22px;
  border-bottom: 2px solid var(--line-strong);
  padding-bottom: 16px;
}

.section-head h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.15rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.section-head a {
  color: var(--cyan-dark);
  font-family: var(--mono);
  font-weight: 720;
}

.endpoint-table,
.skill-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.82);
}

.endpoint-table th,
.endpoint-table td,
.skill-table th,
.skill-table td {
  border: 1px solid var(--line);
  padding: 17px 20px;
  text-align: left;
  vertical-align: top;
}

.endpoint-table th,
.skill-table th {
  background: var(--soft);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.endpoint-table a,
.skill-table a {
  color: var(--cyan-dark);
  font-family: var(--mono);
  font-weight: 760;
}

.endpoint-table button {
  min-width: 74px;
  min-height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  cursor: pointer;
}

.endpoint-table button[data-state="copied"] {
  border-color: var(--cyan);
  color: var(--cyan-dark);
}

.route-grid {
  display: grid;
  border: 1px solid var(--line);
  background: var(--bg);
}

.route-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) minmax(260px, 0.8fr);
  gap: 18px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 22px;
}

.route-row:first-child {
  border-top: 0;
}

.route-row strong {
  display: block;
  font-size: 1.35rem;
  color: var(--cyan-dark);
}

.route-row:nth-child(2n) strong,
.route-row:nth-child(5n) strong {
  color: var(--amber);
}

.route-row a {
  display: inline-block;
  margin-top: 6px;
  color: var(--cyan-dark);
  font-family: var(--mono);
}

.route-row p {
  margin: 0;
  color: var(--muted);
  line-height: 1.62;
}

.route-row code {
  display: block;
  overflow-wrap: anywhere;
  color: var(--ink);
  line-height: 1.7;
}

.map-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(360px, 1fr);
  gap: 28px;
  align-items: start;
}

.map-copy {
  border-left: 4px solid var(--amber);
  padding-left: 22px;
}

.map-copy h3 {
  margin: 0;
  font-size: 2rem;
}

.map-copy p {
  color: var(--muted);
  line-height: 1.75;
}

.map-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
}

.map-list a {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
}

.map-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
  box-shadow: var(--shadow);
}

.map-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.skill-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}

.skill-tools input {
  flex: 1 1 260px;
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 14px;
  background: var(--bg);
  color: var(--ink);
  font: 0.95rem var(--mono);
}

.axis-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.axis-tabs button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 12px;
  background: var(--bg);
  color: var(--ink);
  font: 0.86rem var(--mono);
  cursor: pointer;
}

.axis-tabs button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.skill-table td:nth-child(2) span {
  display: inline-block;
  margin: 0 5px 5px 0;
  border-bottom: 2px solid var(--amber);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.skill-table code {
  display: block;
  max-width: 340px;
  overflow-wrap: anywhere;
}

.deploy-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--bg);
}

.deploy-step {
  min-height: 220px;
  border-left: 1px solid var(--line);
  padding: 26px;
}

.deploy-step:first-child {
  border-left: 0;
}

.deploy-step svg {
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
}

.deploy-step h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.deploy-step p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.58;
}

.deploy-step a {
  color: var(--cyan-dark);
  font-family: var(--mono);
  font-weight: 760;
}

.terminal-strip {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 28px;
  padding: 12px 16px;
  background: var(--code);
  color: #45e6ff;
  font-family: var(--mono);
  font-size: 0.86rem;
  overflow: auto;
}

.site-footer {
  border-top: 1px solid var(--line-strong);
  padding: 40px 0;
  background: var(--bg);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) repeat(3, minmax(120px, 180px));
  gap: 28px;
}

.footer-grid h2,
.footer-grid h3,
.footer-grid p {
  margin: 0;
}

.footer-grid p {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .site-header .site-shell,
  .top-nav {
    align-items: flex-start;
  }

  .site-header .site-shell {
    flex-direction: column;
    padding: 14px 0;
  }

  .top-nav {
    width: 100%;
    gap: 10px;
    overflow-x: auto;
  }

  .hero-grid,
  .hero-panels,
  .map-layout {
    grid-template-columns: 1fr;
    min-width: 0;
  }

  .hero-copy h1 {
    font-size: 3.2rem;
  }

  .split-line {
    font-size: 2rem;
  }

  .hero-panels {
    grid-template-columns: 1fr;
  }

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

  .section-head,
  .route-row,
  .deploy-strip,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .deploy-step {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .deploy-step:first-child {
    border-top: 0;
  }
}

@media (max-width: 680px) {
  .site-shell {
    width: min(100% - 22px, 1180px);
  }

  body {
    overflow-x: hidden;
  }

  .site-header .site-shell {
    gap: 10px;
  }

  .top-nav {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px 12px;
    overflow-x: visible;
  }

  .nav-link {
    min-height: 32px;
    white-space: nowrap;
  }

  .hero {
    padding-top: 38px;
  }

  .hero-copy h1 {
    font-size: 2.42rem;
  }

  .split-line {
    font-size: 1.45rem;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .button {
    justify-content: center;
  }

  .status-rail,
  .human-rail {
    grid-template-columns: 1fr;
  }

  .status-rail span {
    border-top: 1px solid var(--line);
    border-left: 0;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .status-rail span:first-child {
    border-top: 0;
  }

  .endpoint-table,
  .endpoint-table tbody,
  .endpoint-table tr,
  .endpoint-table td,
  .skill-table,
  .skill-table thead,
  .skill-table tbody,
  .skill-table tr,
  .skill-table td {
    display: block;
    width: 100%;
  }

  .endpoint-table thead,
  .skill-table thead {
    display: none;
  }

  .endpoint-table tr,
  .skill-table tr {
    border: 1px solid var(--line);
    margin-bottom: 12px;
    background: var(--bg);
  }

  .endpoint-table td,
  .skill-table td {
    border: 0;
    border-top: 1px solid var(--line);
  }

  .endpoint-table td:first-child,
  .skill-table td:first-child {
    border-top: 0;
  }

  .lead,
  .console-body,
  .route-row code,
  .skill-table code {
    overflow-wrap: anywhere;
  }

  .terminal-strip {
    display: grid;
  }
}

@media (max-width: 520px) {
  .site-shell {
    width: min(calc(100% - 22px), 368px);
    margin-right: auto;
    margin-left: 11px;
  }

  .hero-copy h1 {
    font-size: 2.2rem;
  }

  .hero-copy .lead {
    max-width: 100%;
    word-break: break-word;
  }
}