.page-about {
  --page-primary: #0066FF;
  --page-accent: #FF6B35;
  --page-bg-light: #F5F7FA;
  --page-text: #1A1A2E;
  --page-text-gray: #4A4A5A;
  --page-border: #D0D5DD;
  --page-h1: 3.5rem;
  --page-h2: 2.5rem;
  --page-h3: 1.75rem;
  --page-body: 1rem;
  --page-small: 0.875rem;
  --page-gap: 2rem;
  --page-radius: 12px;
  --page-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-about__container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-md);
}

/* intro */
.page-about__intro {
  margin-bottom: var(--page-gap);
}
.page-about__intro-text {
  max-width: 720px;
}
.page-about__title {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-h1);
  font-weight: var(--weight-light, 300);
  color: var(--text-black, #1A1A2E);
  line-height: 1.1;
  margin: 0 0 0.25em;
}
.page-about__tagline {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-h2);
  font-weight: var(--weight-bold, 700);
  color: var(--page-primary, #0066FF);
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
}
.page-about__hero {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-body);
  font-weight: var(--weight-light, 300);
  color: var(--page-text-gray, #4A4A5A);
  line-height: 1.6;
  margin: 0;
}

/* journey label */
.page-about__journey-label {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-small);
  font-weight: var(--weight-bold, 700);
  color: var(--page-accent, #FF6B35);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

/* timeline */
.page-about__journey {
  margin-bottom: var(--page-gap);
}
.page-about__timeline {
  position: relative;
  padding-left: 3rem;
}
.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--page-border, #D0D5DD);
}
.page-about__timeline-item {
  position: relative;
  margin-bottom: 2rem;
  cursor: pointer;
}
.page-about__timeline-node {
  position: absolute;
  left: -3rem;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--bg-white, #FFFFFF);
  border: 2px solid var(--page-primary, #0066FF);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: border-color var(--page-transition), background-color var(--page-transition);
}
.page-about__timeline-node .page-about__timeline-icon {
  width: 0.75rem;
  height: 0.75rem;
  color: var(--page-primary, #0066FF);
  transition: color var(--page-transition);
}
.page-about__timeline-item:hover .page-about__timeline-node {
  background: var(--page-primary, #0066FF);
  border-color: var(--page-primary, #0066FF);
}
.page-about__timeline-item:hover .page-about__timeline-node .page-about__timeline-icon {
  color: var(--bg-white, #FFFFFF);
}
.page-about__timeline-year {
  position: absolute;
  left: calc(100% + 0.5rem);
  top: 0;
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-small);
  font-weight: var(--weight-light, 300);
  color: var(--page-text-gray, #4A4A5A);
  white-space: nowrap;
}
.page-about__timeline-content {
  padding-left: 1rem;
}
.page-about__timeline-heading {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-h3);
  font-weight: var(--weight-bold, 700);
  color: var(--text-black, #1A1A2E);
  margin: 0 0 0.25em;
  transition: color var(--page-transition);
}
.page-about__timeline-item:hover .page-about__timeline-heading {
  color: var(--page-primary, #0066FF);
}
.page-about__timeline-desc {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-body);
  font-weight: var(--weight-regular, 400);
  color: var(--page-text-gray, #4A4A5A);
  line-height: 1.5;
  margin: 0;
}
.page-about__timeline-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--page-transition), opacity var(--page-transition);
  opacity: 0;
}
.page-about__timeline-item[data-expand]:hover .page-about__timeline-detail,
.page-about__timeline-item[data-expand]:focus-within .page-about__timeline-detail {
  max-height: 600px;
  opacity: 1;
  padding-top: 0.5rem;
}
.page-about__timeline-detail p {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-small);
  font-weight: var(--weight-regular, 400);
  color: var(--page-text-gray, #4A4A5A);
  line-height: 1.6;
  margin: 0 0 0.5rem;
}
.page-about__timeline-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md, 8px);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,.06));
  margin-top: 0.5rem;
}

/* philosophy */
.page-about__philosophy {
  display: flex;
  flex-direction: column-reverse;
  gap: var(--page-gap);
  margin-bottom: var(--page-gap);
  background: linear-gradient(135deg, var(--bg-light, #F5F7FA) 0%, var(--bg-white, #FFFFFF) 100%);
  border-radius: var(--radius-lg, 16px);
  padding: var(--page-gap);
}
.page-about__philosophy-bg {
  flex: 1;
}
.page-about__philosophy-img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md, 8px);
}
.page-about__philosophy-content {
  flex: 1;
}
.page-about__section-title {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-h2);
  font-weight: var(--weight-light, 300);
  color: var(--text-black, #1A1A2E);
  margin: 0 0 0.5em;
}
.page-about__philosophy-text {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-body);
  font-weight: var(--weight-regular, 400);
  color: var(--page-text-gray, #4A4A5A);
  line-height: 1.7;
  margin: 0 0 1rem;
}
.page-about__philosophy-cta {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-body);
  font-weight: var(--weight-regular, 400);
  color: var(--page-text-gray, #4A4A5A);
}
.page-about__link {
  color: var(--page-primary, #0066FF);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--page-transition);
}
.page-about__link:hover {
  color: var(--page-primary-dark, #004CBF);
}

/* cta */
.page-about__cta {
  position: relative;
  border-radius: var(--radius-lg, 16px);
  overflow: hidden;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about__cta-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about__cta-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}
.page-about__cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--page-gap);
}
.page-about__cta-text {
  font-family: var(--font-family, 'Inter', sans-serif);
  font-size: var(--page-h3);
  font-weight: var(--weight-light, 300);
  color: var(--text-black, #1A1A2E);
  line-height: 1.5;
  margin: 0;
}
.page-about__cta-text .page-about__link {
  font-weight: var(--weight-bold, 700);
}

@media (min-width: 768px) {
  .page-about__container {
    padding: var(--gap-xl) var(--gap-lg);
  }
  .page-about__intro {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
  }
  .page-about__intro-text {
    max-width: 600px;
  }
  .page-about__journey {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--page-gap);
    margin-bottom: 3rem;
  }
  .page-about__journey-label {
    text-align: right;
    margin-bottom: 0;
    padding-top: 0.5rem;
  }
  .page-about__timeline {
    padding-left: 3.5rem;
  }
  .page-about__timeline-year {
    position: static;
    display: block;
    margin-bottom: 0.25rem;
  }
  .page-about__philosophy {
    flex-direction: row;
    align-items: center;
  }
  .page-about__philosophy-bg {
    flex: 0 0 40%;
  }
  .page-about__philosophy-img {
    max-height: 500px;
  }
  .page-about__philosophy-content {
    flex: 0 0 55%;
  }
}
@media (min-width: 1024px) {
  .page-about__intro-text {
    max-width: 720px;
  }
}
</style>

.page-about {
  --page-primary-dark: currentColor;
}