.about {
  --about-step-h: 5rem;
  --about-col-w: 13.5rem;
  --about-conn-w: 3.5rem;
  --about-line: 2px;
  --about-btn-w: 16.125rem;
  --about-btn-h: 3.5rem;
  --about-radius: calc(var(--about-step-h) / 2 + var(--about-line) / 2);

  position: relative;
  padding-block: var(--space-16) var(--space-12);
  background: var(--color-paper);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .about {
    --about-step-h: 5.75rem;
    --about-conn-w: 5rem;
  }
}

@media (min-width: 1024px) {
  .about {
    --about-conn-w: 7.5rem;
  }
}

.about__head {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.about__title {
  font-size: clamp(2.8125rem, 2.2rem + 2vw, 3.75rem);
  line-height: 1;
  color: var(--color-accent);
  white-space: nowrap;
}

.about__rule {
  display: none;
}

@media (min-width: 768px) {
  .about__rule {
    position: relative;
    display: block;
    flex: 1 1 auto;
    height: var(--about-line);
    margin-top: 0.1em;
  }

  .about__rule,
  .about__rule::after {
    background: repeating-linear-gradient(90deg, var(--color-accent) 0 5px, transparent 5px 9px);
  }

  .about__rule::after {
    content: '';
    position: absolute;
    top: 0;
    left: 100%;
    width: 100vw;
    height: 100%;
  }
}

.about__body {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    'text'
    'scheme'
    'cta';
  row-gap: var(--space-8);
}

.about__text {
  grid-area: text;
}

.about__scheme {
  grid-area: scheme;
}

.about__cta {
  grid-area: cta;
  justify-self: center;
}

@media (min-width: 1024px) {
  .about__body {
    grid-template-columns: auto minmax(0, 46rem);
    grid-template-areas:
      'scheme text'
      'scheme cta';
    justify-content: space-between;
    column-gap: var(--space-12);
    row-gap: var(--space-6);
  }

  .about__scheme {
    align-self: end;
    width: calc(var(--about-col-w) + 2 * var(--about-conn-w));
  }

  .about__text {
    /* Первая строка текста — на уровне линии шага 1. */
    padding-top: calc(var(--about-step-h) / 2 - 0.775rem);
  }

  .about__cta {
    justify-self: end;
    align-self: end;
    margin-bottom: calc((var(--about-step-h) - var(--about-btn-h)) / 2);
  }

  .about__body::after {
    content: '';
    position: absolute;
    left: calc(var(--container-pad-inline) + var(--about-col-w) + var(--about-conn-w));
    right: calc(var(--container-pad-inline) + var(--about-btn-w));
    bottom: calc(var(--about-step-h) / 2 - var(--about-line) / 2);
    height: var(--about-line);
    background: var(--color-accent);
  }
}

.about__text p {
  margin: 0 0 1.55em;
  font-size: 1rem;
  line-height: 1.55;
  text-align: justify;
}

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

@media (max-width: 767px) {
  .about__text p {
    text-align: start;
  }
}

.about__scheme {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-inline: var(--about-conn-w);
}

.about__step {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(var(--about-col-w), 100%);
  height: var(--about-step-h);
  text-align: center;
}

.about__step-label {
  font-size: clamp(1.0625rem, 0.95rem + 0.45vw, 1.25rem);
  line-height: 1.1;
}

.about__step-num {
  display: block;
  font-weight: 700;
}

.about__step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: calc(50% - var(--about-line) / 2);
  width: var(--about-conn-w);
  height: calc(var(--about-step-h) + var(--about-line));
  border: var(--about-line) solid var(--color-accent);
  pointer-events: none;
}

.about__step:nth-child(odd):not(:last-child)::after {
  left: 100%;
  border-left: 0;
  border-radius: 0 var(--about-radius) var(--about-radius) 0;
}

.about__step:nth-child(even)::after {
  right: 100%;
  border-right: 0;
  border-radius: var(--about-radius) 0 0 var(--about-radius);
}

.about__step:first-child::before {
  content: '';
  position: absolute;
  top: calc(50% - var(--about-line) / 2);
  right: 100%;
  width: 100vw;
  height: var(--about-line);
  background: var(--color-accent);
  pointer-events: none;
}

.btn.about__cta {
  width: min(var(--about-btn-w), 100%);
  height: var(--about-btn-h);
  font-size: 1.25rem;
}