/* ========== About page scope ========== */
.page-about {
  --about-rail-width: 176px;
  --about-card-radius: 28px;
}

/* 滚动显现：渐进增强，无 JS 时内容保持可见 */
.page-about [data-scroll].is-in-view {
  animation: about-fade-up .7s var(--pdc-ease) both;
}
@keyframes about-fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 01 Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 36px 0 64px;
  background:
    radial-gradient(circle at 80% 10%, rgba(0, 176, 255, .18), transparent 340px),
    linear-gradient(135deg, rgba(255, 109, 0, .05) 0%, transparent 42%),
    var(--pdc-ink);
  border-bottom: 1px solid var(--pdc-border);
  overflow: hidden;
  isolation: isolate;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(248, 250, 252, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(248, 250, 252, .035) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 26%, #000 72%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 26%, #000 72%, transparent);
  z-index: -1;
}
.page-about .about-hero .pdc-breadcrumb {
  margin-bottom: 36px;
  padding-top: 8px;
}
.page-about .about-breadcrumb__sep {
  margin: 0 10px;
  color: var(--pdc-gray);
}
.page-about .about-hero__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px 56px;
}
.page-about .about-hero__side {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.page-about .about-hero__sub {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--pdc-font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--pdc-green);
}
.page-about .about-hero__sub::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--pdc-green);
}
.page-about .about-hero__index {
  font-family: var(--pdc-font-mono);
  font-size: 64px;
  line-height: .9;
  font-weight: 700;
  color: rgba(248, 250, 252, .08);
}
.page-about .about-hero__main h1 {
  font-family: var(--pdc-font-display);
  font-size: clamp(44px, 9vw, 92px);
  line-height: 1.04;
  letter-spacing: .01em;
  color: var(--pdc-white);
  margin: 0 0 26px;
}
.page-about .about-hero__lead {
  font-size: 18px;
  line-height: 1.72;
  color: var(--pdc-gray);
  max-width: 680px;
  margin: 0 0 30px;
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 02 Intro ---------- */
.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .about-intro__body p {
  color: var(--pdc-gray);
  margin: 0 0 16px;
}
.page-about .about-intro__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-intro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 03 Timeline ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 12% 28%, rgba(0, 176, 255, .07), transparent 320px);
}
.page-about .about-timeline > .site-container {
  position: relative;
  z-index: 1;
}
.page-about .about-timeline__head {
  max-width: 720px;
  margin-bottom: 44px;
}
.page-about .about-timeline__layout {
  position: relative;
}
.page-about .about-timeline__rail {
  display: none;
}
.page-about .about-timeline__items {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 28px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: -24px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0, 176, 255, .5), rgba(0, 176, 255, .04));
}
.page-about .about-timeline__item:last-child::before {
  display: none;
}
.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pdc-card);
  border: 2px solid var(--pdc-blue);
  box-shadow: 0 0 0 4px rgba(0, 176, 255, .08);
}
.page-about .about-timeline__card.pdc-card {
  padding: 24px 24px 26px;
}
.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--pdc-font-mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--pdc-green);
  margin-bottom: 10px;
}
.page-about .about-timeline__card h3 {
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--pdc-white);
}
.page-about .about-timeline__card p {
  color: var(--pdc-gray);
  margin: 0;
}
.page-about .about-timeline__media {
  margin-top: 20px;
}
.page-about .about-timeline__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-card-radius);
  box-shadow: var(--pdc-shadow);
}
.page-about .about-timeline__media figcaption,
.page-about .about-honors__figure figcaption,
.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-family: var(--pdc-font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--pdc-gray);
}

/* ---------- 04 Capability ---------- */
.page-about .about-capability {
  position: relative;
  padding-top: 72px;
  padding-bottom: 88px;
  background:
    linear-gradient(160deg, rgba(0, 230, 118, .04) 0%, transparent 34%),
    linear-gradient(340deg, rgba(0, 176, 255, .06) 0%, transparent 42%),
    var(--pdc-carbon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), 0 100%);
}
.page-about .about-capability__head {
  max-width: 720px;
  margin-bottom: 40px;
}
.page-about .about-capability__stats {
  row-gap: 24px;
  column-gap: 24px;
}
.page-about .about-capability__stat.pdc-card {
  padding: 32px 28px;
}
.page-about .about-capability__num {
  display: block;
  font-family: var(--pdc-font-mono);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 18px;
  transition: transform .3s var(--pdc-ease);
}
.page-about .about-capability__stat:hover .about-capability__num {
  transform: scale(1.06);
}
.page-about .about-capability__num--green { color: var(--pdc-green); }
.page-about .about-capability__num--blue { color: var(--pdc-blue); }
.page-about .about-capability__num--orange { color: var(--pdc-orange); }
.page-about .about-capability__stat h3 {
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--pdc-white);
}
.page-about .about-capability__stat p {
  color: var(--pdc-gray);
  margin: 0;
}
.page-about .about-capability__note {
  margin-top: 36px;
  max-width: 880px;
  padding-top: 24px;
  border-top: 1px solid var(--pdc-border);
  color: var(--pdc-gray);
}
.page-about .about-capability__note p {
  margin: 0;
}

/* ---------- 05 Honors ---------- */
.page-about .about-honors__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}
.page-about .about-honors__list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-about .about-honors__item {
  margin: 0;
}
.page-about .about-honors__item p {
  color: var(--pdc-gray);
  font-size: 14px;
  margin: 10px 0 0;
}
.page-about .about-honors__figure,
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-honors__figure img,
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-card-radius);
  box-shadow: var(--pdc-shadow);
}

/* ---------- 06 Team ---------- */
.page-about .about-team {
  position: relative;
  overflow: hidden;
}
.page-about .about-team::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 82% 22%, rgba(0, 230, 118, .06), transparent 360px);
}
.page-about .about-team__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}
.page-about .about-team__media {
  order: 2;
}
.page-about .about-team__body {
  order: 1;
}
.page-about .about-team__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 36px;
  margin: 28px 0 24px;
}
.page-about .about-team__stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.page-about .about-team__stat-num {
  font-family: var(--pdc-font-mono);
  font-size: 56px;
  font-weight: 700;
  line-height: .9;
  color: var(--pdc-green);
}
.page-about .about-team__stat-label {
  color: var(--pdc-gray);
  font-size: 14px;
}
.page-about .about-team__body > p {
  color: var(--pdc-gray);
  margin: 0 0 14px;
}
.page-about .about-team__culture {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

/* ---------- 07 Contact ---------- */
.page-about .about-contact__card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  background: var(--pdc-card);
  border-radius: var(--about-card-radius);
  padding: 32px 28px;
  overflow: hidden;
}
.page-about .about-contact__card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 240px;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(0, 230, 118, .06), transparent);
}
.page-about .about-contact__info {
  position: relative;
}
.page-about .about-contact__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-contact__list li {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
}
.page-about .about-contact__label {
  color: var(--pdc-gray);
  font-size: 14px;
}
.page-about .about-contact__value {
  color: var(--pdc-white);
  font-family: var(--pdc-font-mono);
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
}
.page-about .about-contact__action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 14px;
  border-top: 1px solid var(--pdc-border);
  padding-top: 24px;
}
.page-about .about-contact__action p {
  color: var(--pdc-gray);
  margin: 0;
}

/* ---------- Media queries ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__panel {
    grid-template-columns: 1fr 3fr;
  }
  .page-about .about-hero__side {
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
  }
  .page-about .about-contact__card {
    grid-template-columns: 1.3fr 1fr;
    padding: 44px 48px;
  }
  .page-about .about-contact__action {
    border-top: none;
    border-left: 1px solid var(--pdc-border);
    padding-top: 0;
    padding-left: 44px;
  }
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(220px, 360px) 1fr;
    gap: 64px;
  }
  .page-about .about-honors__grid {
    grid-template-columns: 1.25fr .9fr;
    gap: 72px;
    align-items: center;
  }
  .page-about .about-team__grid {
    grid-template-columns: .9fr 1.1fr;
    gap: 72px;
    align-items: center;
  }
  .page-about .about-team__media {
    order: 1;
  }
  .page-about .about-team__body {
    order: 2;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline__layout {
    display: grid;
    grid-template-columns: var(--about-rail-width) 1fr;
    gap: 56px;
    align-items: start;
  }
  .page-about .about-timeline__rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
    z-index: 2;
    padding-top: 6px;
  }
  .page-about .about-timeline__rail-line {
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 8px;
    width: 2px;
    background: var(--pdc-border);
  }
  .page-about .about-timeline__dot {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin-bottom: 18px;
    padding: 8px 12px;
    border-radius: var(--pdc-radius-pill);
    color: var(--pdc-gray);
    font-family: var(--pdc-font-mono);
    font-size: 13px;
    text-decoration: none;
    transition: all .25s ease;
  }
  .page-about .about-timeline__dot::before {
    content: "";
    width: 10px;
    height: 10px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--pdc-card);
    border: 2px solid var(--pdc-blue);
    transition: all .25s ease;
  }
  .page-about .about-timeline__dot:hover {
    color: var(--pdc-white);
  }
  .page-about .about-timeline__dot.is-active {
    color: var(--pdc-white);
    background: var(--pdc-blue-tint);
  }
  .page-about .about-timeline__dot.is-active::before {
    background: var(--pdc-green);
    border-color: var(--pdc-green);
    box-shadow: 0 0 0 4px rgba(0, 230, 118, .14);
  }
  .page-about .about-timeline__bubble {
    position: absolute;
    left: 50%;
    top: calc(100% + 10px);
    transform: translate(-50%, 6px);
    background: var(--pdc-card);
    border: 1px solid var(--pdc-border);
    color: var(--pdc-white);
    font-family: var(--pdc-font-body);
    font-size: 12px;
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: var(--pdc-radius-pill);
    opacity: 0;
    pointer-events: none;
    transition: all .2s ease;
    z-index: 10;
  }
  .page-about .about-timeline__dot:hover .about-timeline__bubble,
  .page-about .about-timeline__dot:focus-visible .about-timeline__bubble {
    opacity: 1;
    transform: translate(-50%, 0);
  }
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__item::after {
    display: none;
  }
  .page-about .about-timeline__item {
    padding-left: 0;
  }
  .page-about .about-timeline__items {
    gap: 36px;
  }
}