.about-page {
  --about-line: #dfe4dc;
  --about-green: #236957;
  --about-green-dark: #174b3f;
  --about-green-soft: #e8f3ed;
  --about-ink: #161916;
  --about-muted: #717870;
  color: var(--about-ink);
}

.about-wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 72px;
}

.about-intro {
  max-width: 860px;
  padding: 82px 0 56px;
  border-bottom: 1px solid var(--about-line);
}

.about-intro h1 {
  margin: 0;
  color: var(--about-green-dark);
  font-size: clamp(42px, 6vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.065em;
}

@supports (background-clip: text) {
  .about-intro h1 {
    background: linear-gradient(118deg, #1d5b4b 0%, #347b63 48%, #86b99a 100%);
    background-clip: text;
    color: transparent;
  }
}

.about-intro-text {
  position: relative;
  max-width: 660px;
  margin: 28px 0 0;
  padding-left: 20px;
  color: #59635c;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 500;
  line-height: 1.75;
  letter-spacing: -0.018em;
}

.about-intro-text::before {
  position: absolute;
  top: 0.35em;
  bottom: 0.35em;
  left: 0;
  width: 3px;
  border-radius: 999px;
  background: var(--about-green);
  content: "";
}

.about-section {
  display: grid;
  grid-template-columns: 164px minmax(0, 1fr);
  gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--about-line);
}

.about-section:last-child {
  border-bottom: 0;
}

.about-section-label {
  margin: 5px 0 0;
  color: var(--about-green);
  font-size: 13px;
  font-weight: 800;
}

.about-section-main {
  max-width: 810px;
}

.about-section h2 {
  margin: 0 0 24px;
  font-size: 25px;
  line-height: 1.2;
  letter-spacing: -0.05em;
}

.about-section-main > h3 {
  margin: 30px 0 10px;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: -0.025em;
}

.about-section-main > h2 + h3 {
  margin-top: 0;
}

.about-section p {
  margin: 0;
  color: var(--about-muted);
  font-size: 16px;
  line-height: 1.9;
}

.about-section p + p {
  margin-top: 14px;
}

.about-section strong {
  color: var(--about-ink);
}

.about-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.about-principle {
  padding: 22px 20px;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  background: rgba(234, 245, 240, 0.7);
}

.about-principle h3 {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: -0.025em;
}

.about-principle p {
  font-size: 14px;
  line-height: 1.72;
}

.about-steps {
  display: grid;
  gap: 18px;
}

.about-usage-paths {
  display: grid;
  gap: 32px;
  margin-top: 26px;
}

.about-usage-path {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 28px;
}

.about-usage-path + .about-usage-path {
  padding-top: 32px;
  border-top: 1px dashed var(--about-line);
}

.about-usage-path h3 {
  margin: 1px 0 0;
  color: var(--about-green-dark);
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: -0.025em;
}

.about-step {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 15px;
  align-items: start;
}

.about-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--about-green);
  font-size: 13px;
  font-weight: 800;
}

.about-step strong,
.about-step span {
  display: block;
}

.about-step strong {
  margin: 2px 0 4px;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.about-step div > span {
  color: var(--about-muted);
  font-size: 14px;
  line-height: 1.7;
}

.about-rules {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.about-rules li {
  position: relative;
  padding-left: 18px;
  color: var(--about-muted);
  font-size: 15px;
  line-height: 1.75;
}

.about-rules li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--about-green);
  content: "";
}

@media (max-width: 760px) {
  .about-wrap {
    padding-bottom: 40px;
  }

  .about-intro {
    padding: 52px 0 42px;
  }

  .about-section {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 42px 0;
  }

  .about-section-label {
    margin-top: 0;
  }

  .about-principles {
    grid-template-columns: 1fr;
  }

  .about-intro-text {
    margin-top: 22px;
    padding-left: 16px;
  }

  .about-usage-path {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}