.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-bg);
  background-size: 52px 52px;
  padding-top: 92px;
  padding-bottom: 64px;
}

.tutorial-hero::after {
  position: absolute;
  right: 8%;
  bottom: -190px;
  width: 520px;
  height: 340px;
  border-radius: var(--radius-pill);
  background: radial-gradient(ellipse, var(--color-accent-mist), var(--color-transparent) 72%);
  content: "";
  pointer-events: none;
}

.tutorial-hero-decor {
  position: absolute;
  top: 52px;
  right: 9%;
  width: 176px;
  height: 176px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background:
    linear-gradient(90deg, var(--color-transparent) 49%, var(--color-border) 50%, var(--color-transparent) 51%),
    linear-gradient(var(--color-transparent) 49%, var(--color-border) 50%, var(--color-transparent) 51%);
  opacity: 0.55;
}

.tutorial-hero-decor::before,
.tutorial-hero-decor::after {
  position: absolute;
  border-radius: var(--radius-pill);
  content: "";
}

.tutorial-hero-decor::before {
  inset: 28px;
  border: 1px solid var(--color-line-soft);
}

.tutorial-hero-decor::after {
  inset: 68px;
  background: var(--color-accent);
  box-shadow: 0 0 28px var(--color-accent-glow);
}

.tutorial-hero-inner {
  position: relative;
  z-index: 1;
}

.tutorial-hero .badge {
  margin-bottom: 20px;
}

.tutorial-hero h1 {
  max-width: 790px;
}

.tutorial-lead {
  max-width: 720px;
  margin-bottom: 28px;
  font-size: 18px;
}

.tutorial-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tutorial-route {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  max-width: 880px;
  margin-top: 48px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-edge-highlight);
}

.tutorial-route span {
  display: flex;
  min-height: 62px;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.tutorial-route span + span {
  border-left: 1px solid var(--color-border);
}

.tutorial-route b {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-main {
  background:
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-bg);
  background-size: 72px 72px;
}

.tutorial-document {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  align-items: start;
  gap: 54px;
}

.tutorial-document > .toc-tabs {
  top: 18px;
  flex-direction: column;
}

.tutorial-document > .toc-tabs a {
  width: 100%;
}

.tutorial-content {
  display: grid;
  min-width: 0;
  gap: 34px;
}

.tutorial-opening {
  margin-bottom: 10px;
}

.tutorial-step {
  position: relative;
  scroll-margin-top: var(--toc-offset);
  border-top: 1px solid var(--color-border);
  padding-top: 42px;
}

.tutorial-step-head {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: start;
  gap: 24px;
  margin-bottom: 26px;
}

.tutorial-step-code {
  padding-top: 10px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.tutorial-step-head h2 {
  margin-bottom: 0;
}

.tutorial-step-body {
  max-width: 820px;
  margin-left: 194px;
}

.tutorial-step-body > p {
  margin-bottom: 20px;
}

.tutorial-step-body pre {
  margin-top: 24px;
  margin-bottom: 24px;
}

.tutorial-inline-action {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 28px;
  border-top: 1px solid var(--color-border);
  padding-top: 22px;
}

.tutorial-inline-action span {
  color: var(--color-text-muted);
  font-size: 13px;
}

.platform-instruction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.platform-instruction {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  padding: 24px;
  box-shadow: inset 0 1px 0 var(--color-edge-highlight);
}

.platform-instruction:nth-child(even) {
  transform: translateY(18px);
}

.platform-instruction h3 {
  margin-top: 14px;
  font-size: 22px;
}

.platform-instruction p {
  font-size: 14px;
}

.platform-instruction p:last-child {
  margin-bottom: 0;
}

.platform-seal,
.verification-code {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.verification-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
  margin-bottom: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-edge-highlight);
}

.verification-board > div {
  min-width: 0;
  padding: 22px;
}

.verification-board > div + div {
  border-left: 1px solid var(--color-border);
}

.verification-board strong {
  display: block;
  margin-top: 10px;
  margin-bottom: 6px;
}

.verification-board p {
  margin-bottom: 0;
  font-size: 13px;
}

.tutorial-content > .promo-block {
  margin-top: 28px;
}

@media (max-width: 980px) {
  .tutorial-document {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .tutorial-document > .toc-tabs {
    top: 10px;
    flex-direction: row;
  }

  .tutorial-document > .toc-tabs a {
    width: auto;
  }

  .tutorial-step-body {
    margin-left: 0;
  }
}

@media (max-width: 768px) {
  .tutorial-hero {
    padding-top: 68px;
    padding-bottom: 48px;
  }

  .tutorial-hero-decor {
    display: none;
  }

  .tutorial-lead {
    font-size: 16px;
  }

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

  .tutorial-route span + span {
    border-left: 0;
  }

  .tutorial-route span:nth-child(even) {
    border-left: 1px solid var(--color-border);
  }

  .tutorial-route span:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }

  .tutorial-step-head {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .tutorial-step-code {
    padding-top: 0;
  }

  .platform-instruction-grid {
    grid-template-columns: 1fr;
  }

  .platform-instruction:nth-child(even) {
    transform: none;
  }

  .verification-board {
    grid-template-columns: 1fr;
  }

  .verification-board > div + div {
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .tutorial-route span {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  .tutorial-inline-action {
    align-items: flex-start;
    flex-direction: column;
  }

  .platform-instruction {
    padding: 20px;
  }
}

@media (max-width: 390px) {
  .tutorial-route {
    grid-template-columns: 1fr;
  }

  .tutorial-route span:nth-child(even) {
    border-left: 0;
  }

  .tutorial-route span + span {
    border-top: 1px solid var(--color-border);
  }
}