.tutorial-hero {
  position: relative;
  padding-top: 72px;
  padding-bottom: 88px;
  overflow: hidden;
}

.tutorial-hero::before {
  position: absolute;
  z-index: 0;
  top: -180px;
  right: -120px;
  width: 720px;
  height: 720px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-glow-core), var(--color-glow-mid) 44%, var(--color-glow-clear) 72%);
  content: "";
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(390px, .72fr);
  align-items: center;
  gap: 72px;
}

.tutorial-hero-copy {
  max-width: 650px;
}

.tutorial-hero h1 {
  max-width: 620px;
  margin-bottom: 22px;
  font-size: clamp(34px, 3.3vw, 48px);
}

.tutorial-lead {
  max-width: 650px;
  margin-bottom: 28px;
  color: var(--color-ink-soft);
  font-size: 19px;
  line-height: 1.75;
}

.tutorial-route {
  position: relative;
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-canvas);
  box-shadow: var(--shadow-deep);
  transform: rotate(2deg);
}

.tutorial-route::after {
  position: absolute;
  z-index: -1;
  inset: 16px -12px -14px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-panel-warm);
  content: "";
}

.route-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-line);
}

.route-head span {
  color: var(--color-ink-soft);
  font-size: 13px;
}

.route-head strong {
  font-family: var(--font-display);
  font-size: 18px;
}

.route-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-list li {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 14px;
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.route-list li:first-child {
  background: var(--color-panel-warm);
}

.route-number {
  display: inline-flex;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-brand-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.route-list div {
  display: grid;
}

.route-list strong {
  font-size: 15px;
}

.route-list small {
  color: var(--color-ink-soft);
}

.tutorial-intro {
  padding-top: 40px;
}

.platform-guide {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(400px, 1.05fr);
  align-items: center;
  gap: 48px;
  padding: 42px;
  border-radius: var(--radius-section);
  background: var(--color-panel);
}

.platform-guide-copy h2 {
  margin-bottom: 14px;
}

.platform-guide-copy p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
}

.platform-links {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 9px;
}

.platform-links a {
  display: flex;
  min-height: 92px;
  min-width: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 6px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.platform-links a:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-strong);
  transform: translateY(-2px);
}

.platform-links svg {
  width: 27px;
  height: 27px;
}

.tutorial-intro .callout {
  margin-bottom: 0;
}

.tutorial-body {
  padding-top: 36px;
}

.manual-layout {
  position: relative;
}

.tutorial-chapter {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 34px;
  padding-top: 68px;
  padding-bottom: 68px;
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: 24px;
}

.tutorial-chapter:last-child {
  border-bottom: 0;
}

.chapter-marker {
  position: relative;
  display: flex;
  justify-content: center;
}

.chapter-marker::after {
  position: absolute;
  top: 58px;
  bottom: -69px;
  width: 1px;
  background: var(--color-line);
  content: "";
}

.tutorial-chapter:last-child .chapter-marker::after {
  display: none;
}

.chapter-marker span {
  position: sticky;
  top: 84px;
  display: inline-flex;
  width: 58px;
  height: 58px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-pill);
  background: var(--color-panel-warm);
  color: var(--color-brand-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.chapter-content {
  max-width: 850px;
}

.chapter-content > p {
  color: var(--color-ink-soft);
}

.chapter-content > p strong {
  color: var(--color-ink);
}

.chapter-content h2 {
  scroll-margin-top: 100px;
}

.chapter-content h3 {
  margin-top: 38px;
  font-size: 24px;
}

.check-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}

.check-strip > div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: 10px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  box-shadow: var(--shadow-soft);
}

.check-strip small {
  grid-column: 2;
  color: var(--color-ink-soft);
}

.status-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.setting-preview,
.mode-preview,
.connection-preview {
  margin: 30px 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-canvas);
  box-shadow: var(--shadow-soft);
}

.setting-preview {
  padding: 24px;
}

.setting-preview-head,
.setting-row,
.connection-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.setting-preview-head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-line);
}

.setting-preview-head div,
.setting-row div,
.connection-row div {
  display: grid;
}

.setting-preview-head small,
.setting-row small,
.connection-row small,
.mode-preview small {
  color: var(--color-ink-soft);
}

.setting-row {
  min-height: 76px;
  border-bottom: 1px solid var(--color-line);
}

.setting-row:last-child {
  border-bottom: 0;
}

.current-state {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  color: var(--color-brand-strong);
  font-size: 13px;
  font-weight: 700;
}

.current-state::before {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-brand);
  content: "";
}

.preview-button {
  display: inline-flex;
  min-height: 38px;
  flex: 0 0 auto;
  align-items: center;
  padding: 7px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
}

.mode-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 24px;
}

.mode-preview-title {
  display: grid;
  flex: 0 0 auto;
}

.mode-segments {
  display: grid;
  width: min(100%, 420px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 5px;
  padding: 5px;
  border-radius: var(--radius-pill);
  background: var(--color-panel);
}

.mode-segments span {
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-size: 14px;
  font-weight: 650;
  text-align: center;
}

.mode-segments .is-selected {
  background: var(--color-canvas);
  color: var(--color-brand-strong);
  box-shadow: var(--shadow-soft);
}

.connection-preview {
  padding: 8px 24px;
}

.connection-row {
  min-height: 86px;
  border-bottom: 1px solid var(--color-line);
}

.connection-row:last-child {
  border-bottom: 0;
}

.switch-preview {
  position: relative;
  display: inline-flex;
  width: 48px;
  height: 28px;
  flex: 0 0 auto;
  align-items: center;
  padding: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-switch-off);
}

.switch-preview i {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  box-shadow: var(--shadow-knob);
}

.switch-preview.is-on {
  justify-content: flex-end;
  background: var(--color-brand);
}

.verify-grid {
  display: grid;
  gap: 12px;
  margin: 30px 0;
}

.verify-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.verify-index {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-brand-strong);
  color: var(--color-white-text);
  font-family: var(--font-mono);
  font-weight: 700;
}

.verify-item p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
}

.next-reading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  margin-top: 38px;
  padding: 32px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-panel-warm);
}

.next-reading h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.next-reading p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
}

.next-reading .button-row {
  justify-content: flex-end;
}

@media (max-width: 960px) {
  .tutorial-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(330px, .8fr);
    gap: 40px;
  }

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

  .platform-links {
    max-width: 680px;
  }

  .check-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .tutorial-hero {
    padding-top: 52px;
    padding-bottom: 64px;
  }

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

  .tutorial-hero h1 {
    font-size: clamp(26px, 8vw, 30px);
  }

  .tutorial-lead {
    font-size: 17px;
  }

  .tutorial-route {
    transform: none;
  }

  .platform-guide {
    padding: 26px;
  }

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

  .tutorial-chapter {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 18px;
  }

  .chapter-marker span {
    width: 48px;
    height: 48px;
  }

  .chapter-marker::after {
    top: 48px;
  }

  .mode-preview {
    align-items: stretch;
    flex-direction: column;
  }

  .mode-segments {
    width: 100%;
  }

  .next-reading {
    grid-template-columns: 1fr;
  }

  .next-reading .button-row {
    justify-content: flex-start;
  }
}

@media (max-width: 540px) {
  .tutorial-route {
    padding: 22px;
  }

  .route-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .platform-guide {
    padding: 22px;
  }

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

  .tutorial-chapter {
    display: block;
    padding-top: 54px;
    padding-bottom: 54px;
  }

  .chapter-marker {
    justify-content: flex-start;
    margin-bottom: 18px;
  }

  .chapter-marker::after {
    display: none;
  }

  .chapter-marker span {
    position: static;
  }

  .setting-preview {
    padding: 18px;
  }

  .setting-preview-head,
  .setting-row,
  .connection-row {
    align-items: flex-start;
  }

  .setting-row,
  .connection-row {
    min-height: 0;
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .mode-preview {
    padding: 18px;
  }

  .mode-segments span {
    padding-inline: 8px;
  }

  .connection-preview {
    padding-inline: 18px;
  }

  .verify-item {
    align-items: flex-start;
  }

  .next-reading {
    padding: 24px;
  }
}