.page-about {
  --pg-card: rgba(17, 23, 64, 0.72);
  --pg-glass: rgba(10, 14, 39, 0.78);
  --pg-dim: rgba(255, 255, 255, 0.04);
  background: var(--bg-deep);
  color: var(--white);
  overflow-x: hidden;
}

.page-about .pg-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 88px;
  overflow: hidden;
  background:
    radial-gradient(circle at 68% 32%, rgba(0, 255, 136, 0.12), transparent 32%),
    radial-gradient(circle at 90% 75%, rgba(255, 176, 32, 0.08), transparent 30%),
    var(--bg-deep);
}

.page-about .pg-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 100% 72px;
  transform: skewY(-4deg);
  transform-origin: top left;
  pointer-events: none;
  z-index: 1;
}

.page-about .pg-hero__inner {
  position: relative;
  z-index: 3;
  padding-top: 24px;
}

.page-about .pg-hero__breadcrumb {
  margin: 0 0 32px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .pg-hero__title {
  margin: 0 0 24px;
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.page-about .pg-hero__em {
  color: var(--neon);
}

.page-about .pg-hero__title::after {
  content: "";
  display: block;
  width: 92px;
  height: 6px;
  margin-top: 22px;
  background: var(--amber);
  transform: skewX(-24deg);
}

.page-about .pg-hero__sub {
  margin: 0 0 36px;
  max-width: 42ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .pg-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .pg-hero__meta-item {
  display: inline-block;
  padding: 8px 12px;
  border-left: 3px solid var(--neon);
  background: var(--pg-dim);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-about .pg-hero__scroll {
  display: inline-block;
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 4px;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.page-about .pg-hero__scroll:hover {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .pg-hero__slant {
  position: absolute;
  top: 18%;
  right: -10%;
  width: 66%;
  height: 70%;
  background: linear-gradient(140deg, rgba(0, 255, 136, 0.18) 0%, var(--bg-steel) 48%, var(--bg-steel) 100%);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 1;
}

.page-about .pg-hero__vtext {
  position: absolute;
  right: 24px;
  bottom: 32px;
  writing-mode: vertical-rl;
  z-index: 4;
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  color: rgba(255, 255, 255, 0.4);
  display: none;
}

@media (max-width: 767px) {
  .page-about .pg-hero__slant {
    opacity: 0.55;
  }
}

@media (min-width: 768px) {
  .page-about .pg-hero__vtext {
    display: inline-block;
  }
}

.page-about .pg-mission {
  position: relative;
  padding: 104px 0 88px;
}

.page-about .pg-mission__grid {
  display: grid;
  gap: 56px;
  align-items: center;
}

.page-about .pg-mission__content h2,
.page-about .pg-milestones__inner h2,
.page-about .pg-commitment h2,
.page-about .pg-tech__heading h2 {
  margin: 8px 0 16px;
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .pg-mission__lead {
  margin: 0 0 28px;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 46ch;
}

.page-about .pg-mission__points {
  border-top: 1px solid var(--line);
}

.page-about .pg-mission__point {
  position: relative;
  padding: 20px 0 20px 56px;
  border-bottom: 1px solid var(--line);
}

.page-about .pg-mission__point:last-child {
  border-bottom: 0;
}

.page-about .pg-mission__num {
  position: absolute;
  left: 0;
  top: 22px;
  font-size: 0.875rem;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-about .pg-mission__point h3 {
  margin: 0 0 6px;
  font-size: 1.125rem;
}

.page-about .pg-mission__point p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .pg-mission__media {
  position: relative;
}

.page-about .pg-mission__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .pg-mission__glass {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 28%, var(--pg-glass) 100%);
  pointer-events: none;
}

.page-about .pg-milestones {
  position: relative;
  padding: 112px 0 96px;
  background: var(--bg-steel);
  overflow: hidden;
}

.page-about .pg-milestones__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  opacity: 0.14;
}

.page-about .pg-milestones__inner {
  position: relative;
  z-index: 2;
}

.page-about .pg-milestones__intro {
  color: var(--muted);
  max-width: 40ch;
  margin-bottom: 56px;
}

.page-about .pg-timeline {
  position: relative;
  margin-bottom: 24px;
}

.page-about .pg-timeline__path {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 36px;
  width: 16px;
  transform: translateX(-50%);
  z-index: 1;
  pointer-events: none;
}

.page-about .pg-timeline__path path {
  fill: none;
  stroke: rgba(255, 255, 255, 0.3);
  stroke-width: 2;
  stroke-dasharray: 4 8;
}

.page-about .pg-timeline__item {
  position: relative;
  padding-left: 76px;
  margin-bottom: 56px;
  z-index: 2;
}

.page-about .pg-timeline__item:last-child {
  margin-bottom: 0;
}

.page-about .pg-timeline__marker {
  position: absolute;
  top: 8px;
  left: 29px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.18), 0 0 24px rgba(0, 255, 136, 0.5);
  z-index: 3;
}

.page-about .pg-timeline__year {
  margin-bottom: 10px;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--neon);
}

.page-about .pg-timeline__card {
  background: var(--pg-card);
  padding: 18px 22px;
  border-left: 3px solid var(--neon);
  border-radius: 0 8px 8px 0;
  transition: box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.page-about .pg-timeline__item--2021 .pg-timeline__card {
  border-left-color: var(--amber);
}

.page-about .pg-timeline__item--2023 .pg-timeline__card {
  border-left-color: var(--data-blue);
}

.page-about .pg-timeline__item--2024 .pg-timeline__card {
  border-left-color: var(--neon);
}

.page-about .pg-timeline__card h3 {
  margin: 0 0 8px;
  font-size: 1.1875rem;
}

.page-about .pg-timeline__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .pg-timeline__item--2018 .pg-timeline__card {
  transform: skewX(-1deg);
}

.page-about .pg-timeline__item--2021 .pg-timeline__card {
  transform: skewX(1deg);
}

.page-about .pg-timeline__item--2023 .pg-timeline__card {
  transform: skewX(-0.6deg);
}

.page-about .pg-timeline__item--2024 .pg-timeline__card {
  transform: skewX(0.6deg);
}

.page-about .pg-timeline__item:hover .pg-timeline__card,
.page-about .pg-timeline__item:focus-within .pg-timeline__card {
  transform: skewX(0deg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
  background: rgba(17, 23, 64, 0.92);
  border-color: var(--white);
}

.page-about .pg-milestones__note {
  margin-top: 40px;
  padding: 16px 20px;
  border-left: 3px solid var(--amber);
  background: rgba(10, 14, 39, 0.5);
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .pg-milestones__note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 136, 0.4);
}

.page-about .pg-commitment {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}

.page-about .pg-commitment::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 90px;
  background: linear-gradient(135deg, var(--bg-steel) 0%, var(--bg-deep) 55%);
  opacity: 0.55;
}

.page-about .pg-commitment__inner {
  position: relative;
  z-index: 2;
}

.page-about .pg-commitment__lead {
  color: var(--muted);
  margin-bottom: 48px;
}

.page-about .pg-commitment__list {
  display: grid;
  gap: 20px;
}

.page-about .pg-commitment__item {
  position: relative;
  padding: 28px 24px 28px 72px;
  background: linear-gradient(135deg, var(--bg-steel), rgba(17, 23, 64, 0.35));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .pg-commitment__item--daily {
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.16), var(--bg-steel) 58%);
}

.page-about .pg-commitment__item--recover {
  background: linear-gradient(135deg, rgba(51, 169, 255, 0.16), var(--bg-steel) 58%);
}

.page-about .pg-commitment__item--sichuan {
  background: linear-gradient(135deg, rgba(255, 176, 32, 0.16), var(--bg-steel) 58%);
}

.page-about .pg-commitment__index {
  position: absolute;
  left: 20px;
  top: 28px;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--neon);
}

.page-about .pg-commitment__item--recover .pg-commitment__index {
  color: var(--data-blue);
}

.page-about .pg-commitment__item--sichuan .pg-commitment__index {
  color: var(--amber);
}

.page-about .pg-commitment__item h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
}

.page-about .pg-commitment__item p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .pg-commitment__item p:last-child {
  margin-bottom: 0;
}

.page-about .pg-commitment__link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 136, 0.4);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .pg-commitment__link:hover {
  color: var(--white);
  border-color: var(--neon);
}

.page-about .pg-commitment__contact {
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.page-about .pg-tech {
  position: relative;
  padding: 100px 0 112px;
  background: var(--bg-steel);
  overflow: hidden;
}

.page-about .pg-tech__lead {
  max-width: 46ch;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .pg-tech__media {
  position: relative;
  max-width: 720px;
  margin: 48px 0 40px;
}

.page-about .pg-tech__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .pg-tech__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 14, 39, 0.25) 0%, var(--overlay) 100%);
  pointer-events: none;
}

.page-about .pg-tech__badge {
  position: absolute;
  right: 16px;
  bottom: 16px;
  padding: 8px 14px;
  background: var(--neon);
  color: var(--bg-deep);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 4px;
}

.page-about .pg-tech__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.page-about .pg-tech__stat {
  position: relative;
  overflow: hidden;
  padding: 22px 18px;
  background: rgba(10, 14, 39, 0.55);
  border-left: 3px solid var(--neon);
}

.page-about .pg-tech__stat:nth-child(3n + 2) {
  border-left-color: var(--amber);
}

.page-about .pg-tech__stat:nth-child(3n) {
  border-left-color: var(--data-blue);
}

.page-about .pg-tech__stat::after {
  content: "";
  position: absolute;
  right: -16px;
  bottom: -20px;
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.04);
  transform: rotate(45deg);
}

.page-about .pg-tech__num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.page-about .pg-tech__label {
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-about .pg-tech__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .pg-mission__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 72px;
  }

  .page-about .pg-commitment__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .pg-tech__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .pg-hero__slant {
    width: 52%;
    right: -6%;
  }

  .page-about .pg-hero__title {
    font-size: clamp(3.5rem, 8vw, 6.5rem);
  }

  .page-about .pg-timeline__path {
    left: 50%;
  }

  .page-about .pg-timeline__item {
    width: 50%;
    padding-left: 0;
    margin-bottom: 72px;
  }

  .page-about .pg-timeline__item--2018,
  .page-about .pg-timeline__item--2023 {
    margin-left: 0;
  }

  .page-about .pg-timeline__item--2018 .pg-timeline__body,
  .page-about .pg-timeline__item--2023 .pg-timeline__body {
    padding-right: 56px;
    text-align: right;
  }

  .page-about .pg-timeline__item--2021,
  .page-about .pg-timeline__item--2024 {
    margin-left: 50%;
  }

  .page-about .pg-timeline__item--2021 .pg-timeline__body,
  .page-about .pg-timeline__item--2024 .pg-timeline__body {
    padding-left: 56px;
    text-align: left;
  }

  .page-about .pg-timeline__marker {
    left: auto;
    right: -7px;
  }

  .page-about .pg-timeline__item--2021 .pg-timeline__marker,
  .page-about .pg-timeline__item--2024 .pg-timeline__marker {
    right: auto;
    left: -7px;
  }

  .page-about .pg-timeline__card {
    border-left-width: 3px;
    border-left-color: var(--neon);
    border-radius: 8px 0 0 8px;
  }

  .page-about .pg-timeline__item--2018 .pg-timeline__card {
    border-left: 0;
    border-right: 3px solid var(--neon);
    border-radius: 8px 0 0 8px;
  }

  .page-about .pg-timeline__item--2021 .pg-timeline__card {
    border-right: 0;
    border-left: 3px solid var(--amber);
    border-radius: 0 8px 8px 0;
  }

  .page-about .pg-timeline__item--2023 .pg-timeline__card {
    border-left: 0;
    border-right: 3px solid var(--data-blue);
    border-radius: 8px 0 0 8px;
  }

  .page-about .pg-timeline__item--2024 .pg-timeline__card {
    border-right: 0;
    border-left: 3px solid var(--neon);
    border-radius: 0 8px 8px 0;
  }

  .page-about .pg-tech__media {
    margin-bottom: 48px;
  }
}