.page-about{
  position: relative;
  background: var(--color-navy, #0A1E3C);
  color: var(--color-sheet, #E6EBF0);
  overflow: hidden;
}

.page-about__backdrop{
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 520px 380px at 18% 12%, rgba(255, 107, 53, 0.05) 0%, rgba(255, 107, 53, 0) 68%),
    radial-gradient(ellipse 420px 300px at 88% 42%, rgba(57, 255, 20, 0.04) 0%, rgba(57, 255, 20, 0) 66%),
    linear-gradient(135deg, rgba(10, 30, 60, 1) 0%, rgba(6, 19, 40, 1) 100%);
  pointer-events: none;
}

.page-about__grid{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: var(--content-max, 82rem);
  margin: 0 auto;
  gap: 0;
}

.page-about__rail{
  display: none;
}

.page-about__content{
  position: relative;
  padding: 1.5rem 1.25rem 3.5rem;
  min-width: 0;
}

.breadcrumbs{
  margin-bottom: 1.5rem;
}

.breadcrumbs ul{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  color: var(--color-slate, #7A8B99);
}

.breadcrumbs li{
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li + li::before{
  content: '/';
  color: rgba(122, 139, 153, 0.5);
}

.breadcrumbs a{
  color: var(--color-slate, #7A8B99);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover{
  color: var(--color-orange, #FF6B35);
}

.breadcrumbs [aria-current="page"]{
  color: var(--color-sheet, #E6EBF0);
}

.page-about__hero{
  display: grid;
  gap: 2rem;
  padding: 1rem 0 3rem;
  border-bottom: 1px solid rgba(122, 139, 153, 0.2);
}

.page-about__kicker{
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin-bottom: 1.25rem;
}

.page-about__kicker-line{
  display: block;
  width: 2rem;
  height: 2px;
  background: var(--color-orange, #FF6B35);
}

.page-about__hero h1{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: clamp(1.75rem, 4.2vw, 3.25rem);
  line-height: 1.12;
  margin: 0 0 1.25rem;
  color: var(--color-sheet, #E6EBF0);
  max-width: 12em;
  letter-spacing: 0.01em;
}

.page-about__hero-lead{
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(230, 235, 240, 0.78);
  max-width: 42rem;
  margin: 0 0 1.75rem;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
}

.page-about__hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .button{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 1.5rem;
  border-radius: 3px;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  cursor: pointer;
}

.page-about .button--ghost{
  background: transparent;
  border-color: rgba(230, 235, 240, 0.28);
  color: var(--color-sheet, #E6EBF0);
}

.page-about .button--ghost:hover{
  border-color: var(--color-orange, #FF6B35);
  color: var(--color-orange, #FF6B35);
  transform: translateY(-2px);
}

.page-about .button:not(.button--ghost){
  background: var(--color-orange, #FF6B35);
  color: var(--color-navy, #0A1E3C);
}

.page-about .button:not(.button--ghost):hover{
  transform: translateY(-2px);
  background: #ff8355;
}

.page-about__hero-visual{
  position: relative;
}

.page-about__hero-img{
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 3px;
  display: block;
  box-shadow: var(--shadow-md, 0 2px 4px rgba(3, 10, 24, 0.05), 0 18px 42px rgba(3, 10, 24, 0.12));
}

.page-about__hero-caption{
  display: flex;
  gap: 0.75rem;
  margin-top: 0.875rem;
  font-size: 0.8125rem;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  line-height: 1.6;
}

.page-about__caption-num{
  flex-shrink: 0;
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 0.75rem;
  color: var(--color-orange, #FF6B35);
  letter-spacing: 0.08em;
}

.page-about__section{
  padding: 3rem 0;
  border-bottom: 1px solid rgba(122, 139, 153, 0.2);
}

.page-about__section-head{
  margin-bottom: 2rem;
}

.page-about__section-num{
  display: block;
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--color-clay, #BC6C4A);
  margin-bottom: 0.5rem;
}

.page-about__section-head h2{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: clamp(1.375rem, 3vw, 2.125rem);
  line-height: 1.2;
  margin: 0;
  color: var(--color-sheet, #E6EBF0);
}

.page-about__section-body{
  display: grid;
  gap: 1.75rem;
}

.page-about__section-desc{
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(230, 235, 240, 0.74);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  max-width: 44rem;
  margin: 0;
}

.page-about__intro p{
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(230, 235, 240, 0.8);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
  max-width: 46rem;
}

.page-about__position-grid{
  display: grid;
  gap: 1rem;
}

.page-about__position-card{
  background: rgba(230, 235, 240, 0.04);
  border: 1px solid rgba(122, 139, 153, 0.2);
  border-radius: 3px;
  padding: 1.5rem 1.25rem;
  transition: border-color 0.25s, background 0.25s;
}

.page-about__position-card:hover{
  border-color: rgba(255, 107, 53, 0.4);
  background: rgba(230, 235, 240, 0.06);
}

.page-about__position-tag{
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-orange, #FF6B35);
  margin-bottom: 0.75rem;
}

.page-about__position-card h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.125rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0 0 0.75rem;
}

.page-about__position-card p{
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(230, 235, 240, 0.7);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
}

.page-about__position-card--main{
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, rgba(255, 107, 53, 0.02) 60%);
  border-color: rgba(255, 107, 53, 0.25);
}

.page-about__timeline{
  margin-top: 0.5rem;
}

.page-about__timeline-tabs{
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid rgba(122, 139, 153, 0.2);
  padding-bottom: 0.875rem;
}

.page-about__timeline-tab{
  appearance: none;
  background: transparent;
  border: 1px solid rgba(122, 139, 153, 0.25);
  border-radius: 3px;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-about__timeline-tab[aria-selected="true"]{
  background: var(--color-orange, #FF6B35);
  border-color: var(--color-orange, #FF6B35);
  color: var(--color-navy, #0A1E3C);
  font-weight: 600;
}

.page-about__timeline-tab:hover{
  border-color: var(--color-orange, #FF6B35);
  color: var(--color-orange, #FF6B35);
}

.page-about__timeline-tab[aria-selected="true"]:hover{
  color: var(--color-navy, #0A1E3C);
}

.page-about__timeline-panels{
  display: grid;
  gap: 1rem;
}

.page-about__timeline-panel{
  display: block;
}

.page-about__timeline-panel[hidden]{
  display: none;
}

.page-about__timeline-panel-grid{
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 1rem;
  padding: 1.5rem 0;
}

.page-about__timeline-node{
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__node-dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-slate, #7A8B99);
  margin-top: 0.375rem;
  flex-shrink: 0;
}

.page-about__node-dot--active{
  background: var(--color-volt, #39FF14);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.14);
}

.page-about__node-line{
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, rgba(122, 139, 153, 0.4), rgba(122, 139, 153, 0.08));
  margin-top: 0.625rem;
}

.page-about__timeline-content{
  padding-bottom: 1rem;
}

.page-about__timeline-label{
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin-bottom: 0.625rem;
}

.page-about__timeline-label--current{
  color: var(--color-volt, #39FF14);
}

.page-about__timeline-content h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.25rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0 0 1rem;
  line-height: 1.3;
}

.page-about__timeline-list{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.625rem;
}

.page-about__timeline-list li{
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(230, 235, 240, 0.74);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
}

.page-about__timeline-list li::before{
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 7px;
  height: 1px;
  background: var(--color-orange, #FF6B35);
}

.page-about__version-compare{
  margin-top: 1rem;
  background: rgba(230, 235, 240, 0.03);
  border: 1px solid rgba(122, 139, 153, 0.18);
  border-radius: 3px;
  padding: 1.5rem 1.25rem;
}

.page-about__compare-head{
  margin-bottom: 1.25rem;
}

.page-about__compare-label{
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-clay, #BC6C4A);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin-bottom: 0.375rem;
}

.page-about__compare-head h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.25rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0;
}

.page-about__compare-list{
  margin: 0;
  display: grid;
}

.page-about__compare-row{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.375rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid rgba(122, 139, 153, 0.14);
}

.page-about__compare-row:last-child{
  border-bottom: none;
  padding-bottom: 0;
}

.page-about__compare-row:first-child{
  padding-top: 0.375rem;
}

.page-about__compare-row dt{
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-sheet, #E6EBF0);
}

.page-about__compare-row dd{
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(230, 235, 240, 0.64);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
}

.page-about__version-img{
  margin-top: 1.25rem;
}

.page-about__version-img img,
.page-about__service-img img{
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 3px;
  display: block;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(3, 10, 24, 0.04), 0 6px 18px rgba(3, 10, 24, 0.07));
}

.page-about__img-caption{
  display: block;
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
}

.page-about__service-steps{
  display: grid;
  gap: 0.875rem;
}

.page-about__step{
  background: rgba(230, 235, 240, 0.04);
  border-left: 3px solid var(--color-orange, #FF6B35);
  padding: 1.25rem;
  border-radius: 0 3px 3px 0;
}

.page-about__step-num{
  display: inline-block;
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 0.75rem;
  color: var(--color-orange, #FF6B35);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.page-about__step h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.0625rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0 0 0.5rem;
}

.page-about__step p{
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(230, 235, 240, 0.68);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
}

.page-about__service-panel{
  background: linear-gradient(140deg, rgba(10, 30, 60, 0.12) 0%, rgba(10, 30, 60, 0.55) 100%);
  border: 1px solid rgba(122, 139, 153, 0.22);
  border-radius: 3px;
  padding: 1.5rem 1.25rem;
  display: grid;
  gap: 1.5rem;
}

.page-about__panel-metrics{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.page-about__metric{
  display: grid;
  gap: 0.375rem;
  padding: 1rem;
  background: rgba(10, 30, 60, 0.5);
  border: 1px solid rgba(122, 139, 153, 0.16);
  border-radius: 3px;
}

.page-about__metric-value{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  color: var(--color-sheet, #E6EBF0);
  line-height: 1.1;
}

.page-about__metric-name{
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
}

.page-about__panel-note{
  border-top: 1px solid rgba(122, 139, 153, 0.16);
  padding-top: 1.25rem;
}

.page-about__panel-note-label{
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-volt, #39FF14);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin-bottom: 0.5rem;
}

.page-about__panel-note p{
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(230, 235, 240, 0.7);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
}

.page-about__service-img{
  margin-top: 0.25rem;
}

.page-about__eco-grid{
  display: grid;
  gap: 1rem;
}

.page-about__eco-card{
  background: rgba(230, 235, 240, 0.04);
  border: 1px solid rgba(122, 139, 153, 0.18);
  border-radius: 3px;
  padding: 1.5rem 1.25rem;
  transition: border-color 0.25s, transform 0.25s;
}

.page-about__eco-card:hover{
  border-color: rgba(57, 255, 20, 0.25);
  transform: translateY(-2px);
}

.page-about__eco-card h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.125rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0 0 0.75rem;
}

.page-about__eco-card p{
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(230, 235, 240, 0.7);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
}

.page-about__feedback{
  display: grid;
  gap: 1rem;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(255, 107, 53, 0.03) 70%);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: 3px;
  padding: 1.5rem 1.25rem;
  align-items: start;
}

.page-about__feedback-icon{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.25);
}

.page-about__feedback-copy h3{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1.125rem;
  color: var(--color-sheet, #E6EBF0);
  margin: 0 0 0.5rem;
}

.page-about__feedback-copy p{
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(230, 235, 240, 0.7);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0 0 1rem;
}

.page-about__feedback-links{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-about__feedback-links a{
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  color: var(--color-orange, #FF6B35);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 53, 0.4);
  transition: border-color 0.2s;
}

.page-about__feedback-links a:hover{
  border-bottom-color: var(--color-orange, #FF6B35);
}

.page-about__footer-note{
  margin-top: 3rem;
  padding: 2rem 0 0.5rem;
  border-top: 1px solid rgba(122, 139, 153, 0.2);
  display: grid;
  gap: 1rem;
}

.page-about__footer-note-brand{
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__footer-note-name{
  font-family: var(--font-display, 'Archivo Black', 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  color: var(--color-sheet, #E6EBF0);
}

.page-about__footer-note-version{
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  color: var(--color-volt, #39FF14);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: 3px;
  padding: 0.25rem 0.625rem;
}

.page-about__footer-note p{
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-slate, #7A8B99);
  font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  margin: 0;
  max-width: 48rem;
}

@media (min-width: 640px){
  .page-about__content{
    padding: 2rem 2rem 4.5rem;
  }

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

  .page-about__position-card--main{
    grid-column: 1 / -1;
  }

  .page-about__compare-row{
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 1.25rem;
    align-items: baseline;
  }

  .page-about__service-steps{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about__service-panel{
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: center;
  }

  .page-about__panel-metrics{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about__feedback{
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1.25rem;
  }
}

@media (min-width: 1060px){
  .page-about{
    background: var(--color-navy, #0A1E3C);
  }

  .page-about__grid{
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 0;
  }

  .page-about__rail{
    display: block;
    position: relative;
    border-right: 1px solid rgba(122, 139, 153, 0.16);
    min-height: 100vh;
  }

  .page-about__rail-inner{
    position: sticky;
    top: 0;
    padding: 5.5rem 1.75rem 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 2.5rem;
    height: 100vh;
    box-sizing: border-box;
  }

  .page-about__anchors-label{
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-slate, #7A8B99);
    font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
    margin-bottom: 1rem;
  }

  .page-about__anchors-list{
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
  }

  .page-about__anchors-list a{
    display: inline-flex;
    gap: 0.625rem;
    font-size: 0.9375rem;
    font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
    color: var(--color-slate, #7A8B99);
    text-decoration: none;
    padding: 0.375rem 0;
    transition: color 0.2s;
    border-bottom: 1px solid transparent;
  }

  .page-about__anchors-list a:hover{
    color: var(--color-orange, #FF6B35);
  }

  .page-about__anchors-list a:focus-visible{
    outline: 2px solid var(--color-orange, #FF6B35);
    outline-offset: 4px;
    border-radius: 2px;
  }

  .page-about__mark{
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-slate, #7A8B99);
    font-family: var(--font-body, 'Inter', 'PingFang SC', 'Noto Sans SC', sans-serif);
  }

  .page-about__content{
    padding: 3rem 3.5rem 5rem;
  }

  .page-about__hero{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
    align-items: center;
    padding: 2rem 0 4rem;
  }

  .page-about__section{
    padding: 4rem 0;
  }

  .page-about__section-head{
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
    margin-bottom: 2.5rem;
  }

  .page-about__section-num{
    margin-bottom: 0;
    padding-top: 0.375rem;
  }

  .page-about__section-body{
    margin-left: 0;
    padding-left: 0;
  }

  .page-about__version-compare{
    margin-top: 1.5rem;
  }

  .page-about__timeline-panel-grid{
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 1.5rem;
    padding: 2rem 0;
  }

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

  .page-about__position-card--main{
    grid-column: span 1;
  }

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

  .page-about__footer-note{
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 2rem;
    padding-top: 2.5rem;
  }

  .page-about__footer-note p{
    max-width: 52rem;
  }
}

@media (min-width: 1280px){
  .page-about__grid{
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .page-about__content{
    padding: 3.5rem 4.5rem 6rem;
  }

  .page-about__section-body{
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about__position-card,
  .page-about__eco-card,
  .page-about .button{
    transition: none;
    transform: none;
  }

  .page-about__timeline-tab,
  .page-about__feedback-links a{
    transition: none;
  }
}