:root {
  --ai-hero-min-height: 650px;
  --ai-board-size: 560px;
  --ai-route-stroke: 2px;
  --ai-section-gap: 34px;
  --ai-card-padding: 34px;
  --ai-panel-padding: 48px;
}

.ai-hero {
  position: relative;
  min-height: var(--ai-hero-min-height);
  padding-top: 54px;
  padding-bottom: 54px;
  display: flex;
  align-items: center;
  overflow-x: clip;
  background-image:
    linear-gradient(to right, transparent, var(--color-panel-strong), transparent),
    radial-gradient(var(--color-border) 1px, transparent 1px);
  background-size: 100% 1px, 25px 25px;
  background-position: center bottom, center;
  background-repeat: no-repeat, repeat;
}

.ai-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr);
  align-items: center;
  gap: 58px;
}

.ai-hero-copy {
  min-width: 0;
}

.ai-hero-badge {
  margin-bottom: 18px;
}

.ai-hero h1 {
  max-width: 690px;
  margin-bottom: 18px;
}

.ai-hero h1 .no-break {
  display: inline-block;
}

.ai-hero h1 .no-break + .no-break {
  margin-left: .18em;
}

.ai-hero-lead {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 18px;
  line-height: 1.8;
}

.ai-hero-actions {
  margin-top: 26px;
}

.ai-fact-list {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.ai-fact-list li {
  min-width: 0;
  padding: 13px 15px;
  display: grid;
  gap: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.ai-fact-list strong {
  font-size: 14px;
}

.ai-fact-list span {
  color: var(--color-muted);
  font-size: 12px;
}

.ai-route-board {
  position: relative;
  width: 100%;
  max-width: var(--ai-board-size);
  aspect-ratio: 1;
  justify-self: end;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background-color: var(--color-panel-strong);
  background-image: radial-gradient(var(--color-border) 1px, transparent 1px);
  background-size: 20px 20px;
  box-shadow: var(--shadow-soft);
}

.ai-route-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ai-route-lines path {
  fill: none;
  stroke: var(--color-line-muted);
  stroke-width: var(--ai-route-stroke);
  stroke-linecap: round;
  stroke-dasharray: 4 8;
}

.ai-route-lines circle {
  fill: var(--color-success);
}

.ai-core-card {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  min-width: 190px;
  padding: 22px;
  display: grid;
  justify-items: center;
  gap: 5px;
  transform: translate(-50%, -50%);
  text-align: center;
}

.ai-core-card strong {
  font-size: 18px;
}

.ai-core-card > span:last-child {
  color: var(--color-muted);
  font-size: 12px;
}

.ai-tool-node {
  position: absolute;
  z-index: 2;
  min-width: 118px;
  padding: 13px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  color: var(--color-teal);
  box-shadow: var(--shadow-card);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.ai-tool-chatgpt {
  top: 15%;
  left: 8%;
}

.ai-tool-claude {
  top: 15%;
  right: 8%;
}

.ai-tool-gemini {
  bottom: 15%;
  left: 8%;
}

.ai-tool-cursor {
  right: 8%;
  bottom: 15%;
}

.ai-board-note {
  position: absolute;
  right: 22px;
  bottom: 18px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.ai-guide {
  position: relative;
}

.ai-guide > .wrap {
  padding-top: 42px;
}

.ai-section {
  min-width: 0;
}

.ai-section .section-head {
  max-width: 820px;
}

.ai-principle-grid {
  display: grid;
  gap: var(--ai-section-gap);
}

.ai-principle {
  min-width: 0;
  padding: var(--ai-panel-padding);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
  align-items: center;
  gap: 48px;
}

.ai-principle.is-reversed .ai-principle-copy {
  order: 2;
}

.ai-principle.is-reversed .ai-mini-card {
  order: 1;
}

.ai-principle-copy p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 17px;
}

.ai-mini-card {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.ai-mini-label {
  display: block;
  margin-bottom: 18px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.ai-mini-card p {
  margin-top: 16px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 12px;
}

.ai-path-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-teal);
  font-size: 12px;
  font-weight: 800;
}

.ai-path-row > span:not(.ai-path-line) {
  flex: 0 0 auto;
}

.ai-path-line {
  min-width: 14px;
  height: 1px;
  flex: 1;
  border-top: 1px dashed var(--color-border);
}

.ai-check-flow {
  display: grid;
  gap: 12px;
}

.ai-check-flow li {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.ai-check-flow .badge-dot {
  flex: 0 0 auto;
}

.ai-stream-lines {
  display: grid;
  gap: 9px;
}

.ai-stream-lines span {
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-panel-strong);
}

.ai-stream-lines span:nth-child(1) {
  width: 84%;
}

.ai-stream-lines span:nth-child(2) {
  width: 100%;
  background: var(--color-ring-start);
}

.ai-stream-lines span:nth-child(3) {
  width: 72%;
}

.ai-stream-lines span:nth-child(4) {
  width: 48%;
}

.ai-tool-table td {
  min-width: 160px;
}

.ai-detail-list {
  display: grid;
  gap: 18px;
}

.ai-detail-card {
  padding: 28px;
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.ai-detail-tag {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel-strong);
  color: var(--color-teal);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
  overflow-wrap: anywhere;
}

.ai-detail-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-soft-section::before {
  position: absolute;
  z-index: -1;
  inset: 22px 0;
  border-block: 1px solid var(--color-border);
  background: var(--color-panel-strong);
  content: "";
}

.ai-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: 48px;
  align-items: center;
}

.ai-split > div > p:not(.eyebrow) {
  color: var(--color-muted);
  font-size: 17px;
}

.ai-account-card {
  padding: var(--ai-card-padding);
}

.ai-plain-steps {
  margin-bottom: 0;
  padding-left: 22px;
  color: var(--color-muted);
}

.ai-plain-steps li + li {
  margin-top: 10px;
}

.ai-compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.ai-compare-card {
  padding: var(--ai-card-padding);
}

.ai-compare-card .chip {
  margin-bottom: 18px;
}

.ai-compare-card p,
.ai-compare-card ul {
  color: var(--color-muted);
}

.ai-compare-card ul {
  padding-left: 20px;
}

.ai-compare-card li + li {
  margin-top: 7px;
}

.ai-workflow {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.ai-workflow-row {
  min-width: 0;
  padding: 34px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 36px;
}

.ai-workflow-row + .ai-workflow-row {
  border-top: 1px solid var(--color-border);
}

.ai-workflow-row p {
  color: var(--color-muted);
}

.ai-workflow-row p:last-child {
  margin-bottom: 0;
}

.ai-workflow-name {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.ai-workflow-name h3 {
  margin-bottom: 0;
}

.ai-terminal-mark {
  min-width: 54px;
  min-height: 40px;
  padding: 8px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-panel-strong);
  color: var(--color-teal);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.ai-choice-panel {
  padding: var(--ai-panel-padding);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 46px;
  align-items: center;
}

.ai-choice-copy p:not(.eyebrow) {
  color: var(--color-muted);
  font-size: 17px;
}

.ai-choice-copy p:last-child {
  margin-bottom: 0;
}

.ai-choice-actions {
  display: grid;
  gap: 12px;
}

.ai-choice-actions .button {
  width: 100%;
}

@media (max-width: 1040px) {
  .ai-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-route-board {
    justify-self: center;
  }

  .ai-principle,
  .ai-split {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-principle.is-reversed .ai-principle-copy,
  .ai-principle.is-reversed .ai-mini-card {
    order: initial;
  }

  .ai-choice-panel {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 760px) {
  :root {
    --ai-card-padding: 24px;
    --ai-panel-padding: 28px;
  }

  .ai-hero {
    min-height: auto;
    padding-top: 38px;
    padding-bottom: 48px;
  }

  .ai-hero-grid {
    gap: 42px;
  }

  .ai-hero h1 .no-break {
    display: block;
  }

  .ai-hero h1 .no-break + .no-break {
    margin-left: 0;
  }

  .ai-hero-lead {
    font-size: 16px;
  }

  .ai-fact-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-route-board {
    max-width: 520px;
  }

  .ai-detail-card,
  .ai-workflow-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .ai-detail-tag {
    width: max-content;
    max-width: 100%;
  }

  .ai-compare-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-choice-actions {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-board-note {
    display: none;
  }
}

@media (max-width: 520px) {
  .ai-route-board {
    aspect-ratio: auto;
    height: 430px;
  }

  .ai-route-lines {
    transform: scale(.82);
  }

  .ai-core-card {
    min-width: 165px;
    padding: 18px;
  }

  .ai-tool-node {
    min-width: 96px;
    padding: 10px 12px;
    font-size: 11px;
  }

  .ai-tool-chatgpt,
  .ai-tool-gemini {
    left: 5%;
  }

  .ai-tool-claude,
  .ai-tool-cursor {
    right: 5%;
  }

  .ai-principle {
    padding: 24px 20px;
    gap: 28px;
  }

  .ai-mini-card,
  .ai-detail-card,
  .ai-workflow-row,
  .ai-choice-panel {
    padding: 22px 18px;
  }

  .ai-workflow-name {
    align-items: center;
  }
}