:root {
  --tutorial-hero-max: 1160px;
  --tutorial-prose-max: 980px;
  --tutorial-route-width: 450px;
  --tutorial-step-indent: 54px;
  --tutorial-line-width: 1px;
}

.tutorial-hero {
  position: relative;
  min-height: calc(82svh - var(--header-height));
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-hero::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--color-dot) 1.2px, transparent 1.2px);
  background-size: 28px 28px;
  content: "";
  pointer-events: none;
}

.tutorial-glow {
  position: absolute;
  top: -280px;
  right: -170px;
  width: 690px;
  height: 690px;
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-accent-glow), transparent 72%);
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: calc(82svh - var(--header-height));
  grid-template-columns: minmax(0, 1fr) minmax(350px, var(--tutorial-route-width));
  align-items: center;
  gap: clamp(42px, 7vw, 96px);
  max-width: var(--tutorial-hero-max);
  padding-top: 72px;
  padding-bottom: 72px;
}

.tutorial-hero-copy {
  max-width: 620px;
}

.tutorial-hero-copy h1 {
  margin-top: 20px;
}

.tutorial-lead {
  max-width: 590px;
  margin-bottom: 27px;
  color: var(--color-text-muted);
  font-size: clamp(16px, 2vw, 19px);
}

.tutorial-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin-top: 26px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.tutorial-facts li {
  position: relative;
  padding-left: 15px;
}

.tutorial-facts li::before {
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  content: "";
  transform: translateY(-50%);
}

.tutorial-route {
  width: 100%;
  padding: 27px;
  transform: rotate(1.5deg);
  border-radius: var(--radius-xl);
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: var(--shadow-deep);
}

.tutorial-route::before {
  display: block;
  height: 8px;
  margin: -27px -27px 23px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: var(--color-accent);
  content: "";
}

.tutorial-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-paper-line);
  color: var(--color-ink-muted);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.tutorial-route-list {
  margin: 0;
  padding: 8px 0 0;
  list-style: none;
  counter-reset: tutorial-route;
}

.tutorial-route-list li {
  position: relative;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 18px;
  padding: 17px 0 17px 40px;
  counter-increment: tutorial-route;
}

.tutorial-route-list li + li {
  border-top: 1px dashed var(--color-paper-line);
}

.tutorial-route-list li::before {
  position: absolute;
  top: 18px;
  left: 0;
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-paper-soft);
  color: var(--color-accent);
  content: counter(tutorial-route);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.tutorial-route-list span {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tutorial-route-list strong {
  color: var(--color-ink);
  font-size: 14px;
}

.tutorial-main {
  position: relative;
}

.tutorial-prose {
  width: 100%;
  max-width: var(--tutorial-prose-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.tutorial-prose .toc-tabs {
  margin-bottom: 34px;
}

.guide-step {
  position: relative;
  margin-top: 70px;
  padding-left: var(--tutorial-step-indent);
}

.guide-step::before {
  position: absolute;
  top: 8px;
  bottom: -70px;
  left: 17px;
  width: var(--tutorial-line-width);
  background: var(--color-border);
  content: "";
}

.guide-step:last-child::before {
  bottom: 0;
}

.guide-step::after {
  position: absolute;
  top: 8px;
  left: 9px;
  width: 17px;
  height: 17px;
  border: 4px solid var(--color-bg);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-border);
  content: "";
}

.guide-step-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.guide-step h2 {
  margin-top: 0;
}

.guide-step p {
  color: var(--color-text-muted);
}

.guide-action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.platform-procedure {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.platform-procedure > section {
  padding: clamp(23px, 4vw, 34px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.platform-procedure-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.platform-procedure-head h3 {
  margin: 0;
  font-size: 22px;
}

.platform-code {
  display: inline-grid;
  min-width: 48px;
  min-height: 34px;
  place-items: center;
  padding-inline: 9px;
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

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

@media (max-width: 860px) {
  .tutorial-hero {
    min-height: auto;
  }

  .tutorial-hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 62px;
    padding-bottom: 76px;
  }

  .tutorial-route {
    max-width: 620px;
    transform: none;
  }
}

@media (max-width: 640px) {
  .tutorial-glow {
    top: -240px;
    right: -390px;
  }

  .tutorial-hero-grid {
    padding-top: 45px;
    padding-bottom: 60px;
  }

  .tutorial-facts {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .tutorial-route {
    padding: 21px;
  }

  .tutorial-route::before {
    margin: -21px -21px 19px;
  }

  .tutorial-route-list li {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 10px;
    padding-left: 34px;
  }

  .guide-step {
    margin-top: 56px;
    padding-left: 35px;
  }

  .guide-step::before {
    bottom: -56px;
    left: 10px;
  }

  .guide-step::after {
    left: 2px;
  }

  .platform-procedure > section {
    padding: 21px;
  }

  .platform-procedure-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 380px) {
  .tutorial-route-list li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .tutorial-route-head {
    align-items: flex-start;
    flex-direction: column;
  }
}