.page-about {
  --about-card: linear-gradient(180deg, rgba(19, 26, 51, 0.92) 0%, rgba(11, 16, 32, 0.92) 100%);
  --about-radius: 22px;
  --about-radius-sm: 14px;
  position: relative;
  color: var(--c-body);
  background: var(--c-void);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .section {
  padding: 56px 0;
}

.page-about .about-hero {
  position: relative;
  padding: calc(var(--shell-h) + 34px) 0 56px;
  background:
    radial-gradient(90% 70% at 92% 4%, rgba(123, 92, 255, 0.22), transparent 62%),
    radial-gradient(70% 60% at 4% 0%, rgba(43, 227, 224, 0.14), transparent 60%),
    var(--c-void);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 34px;
  align-items: center;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-mute);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(34px, 6.4vw, 60px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--c-text);
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-body);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 30px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--c-line);
}

.page-about .about-facts__item--cyan { border-color: var(--c-cyan); }
.page-about .about-facts__item--violet { border-color: var(--c-violet); }
.page-about .about-facts__item--amber { border-color: var(--c-amber); }
.page-about .about-facts__item--green { border-color: var(--c-green); }

.page-about .about-facts__num {
  font-size: clamp(19px, 3.4vw, 26px);
  letter-spacing: 0.02em;
  color: var(--c-text);
}

.page-about .about-facts__label {
  font-size: 13px;
  color: var(--c-mute);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}

.page-about .about-hero__figure .figure__frame {
  position: relative;
  overflow: hidden;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 26px 26px 26px 6px;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  top: -12px;
  right: -12px;
  width: 92px;
  height: 92px;
  border-top: 2px solid var(--c-violet);
  border-right: 2px solid var(--c-violet);
  border-radius: 0 26px 0 0;
  pointer-events: none;
}

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

.page-about .about-hero__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mute);
}

/* 四条业务线 */
.page-about .about-lines__grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .about-line {
  position: relative;
  padding: 28px 22px 26px;
  background: var(--about-card);
  border: 1px solid var(--c-line);
  border-radius: 20px 20px 20px 8px;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-cyan), transparent);
}

.page-about .about-line--violet::before { background: linear-gradient(90deg, var(--c-violet), transparent); }
.page-about .about-line--amber::before { background: linear-gradient(90deg, var(--c-amber), transparent); }
.page-about .about-line--green::before { background: linear-gradient(90deg, var(--c-green), transparent); }

.page-about .about-line:hover {
  border-color: var(--c-cyan);
  transform: translateY(-3px);
}

.page-about .about-line__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-mute);
}

.page-about .about-line__title {
  margin: 12px 0 0;
  font-size: 19px;
  color: var(--c-text);
}

.page-about .about-line__text {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-body);
}

/* 发展里程 */
.page-about .about-scale {
  margin: 30px 0 26px;
}

.page-about .about-scale__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scale__node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-mute);
  text-decoration: none;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-scale__node::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 3px rgba(43, 227, 224, 0.12);
}

.page-about .about-scale__node:hover,
.page-about .about-scale__node:focus-visible {
  color: var(--c-text);
  border-color: var(--c-cyan);
  background: rgba(43, 227, 224, 0.08);
}

.page-about .about-track__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .milestone {
  position: relative;
  padding: 22px 22px 22px 26px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--about-radius) var(--about-radius) var(--about-radius) 8px;
  scroll-margin-top: calc(var(--shell-h) + 24px);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-base) var(--ease);
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-violet));
}

.page-about .milestone:hover {
  border-color: rgba(43, 227, 224, 0.55);
  box-shadow: 0 0 0 1px rgba(43, 227, 224, 0.1), 0 22px 44px -34px rgba(43, 227, 224, 0.6);
}

.page-about .milestone__stage {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .milestone__title {
  margin: 10px 0 0;
  font-size: 20px;
  color: var(--c-text);
}

.page-about .milestone__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-body);
}

.page-about .milestone--now {
  background: linear-gradient(158deg, rgba(123, 92, 255, 0.2), rgba(11, 16, 32, 0.96) 62%);
  border-color: rgba(123, 92, 255, 0.5);
}

.page-about .milestone--now .milestone__stage { color: var(--c-amber); }

.page-about .milestone--now::before {
  background: linear-gradient(180deg, var(--c-amber), var(--c-violet));
}

.page-about .about-track__figure {
  margin: 34px 0 0;
}

.page-about .about-track__figure .figure__frame {
  overflow: hidden;
  background: var(--c-layer);
  border: 1px solid var(--c-line);
  border-radius: 18px;
}

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

.page-about .about-track__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-mute);
}

/* 团队分工 */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .crew {
  padding: 26px 24px;
  background: radial-gradient(120% 120% at 100% 0%, rgba(43, 227, 224, 0.1), transparent 60%), var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 28px 28px 28px 10px;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .crew:nth-child(2n) {
  border-radius: 28px 28px 10px 28px;
  background: radial-gradient(120% 120% at 0 0, rgba(123, 92, 255, 0.14), transparent 62%), var(--c-panel);
}

.page-about .crew:nth-child(3n) {
  background: radial-gradient(130% 130% at 100% 100%, rgba(255, 178, 77, 0.1), transparent 64%), var(--c-panel);
}

.page-about .crew:hover {
  border-color: var(--c-cyan);
  transform: translateY(-3px);
}

.page-about .crew__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-mute);
}

.page-about .crew__name {
  margin: 12px 0 0;
  font-size: 19px;
  color: var(--c-text);
}

.page-about .crew__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-about .crew__keys {
  margin: 16px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

/* 质量与信息安全 */
.page-about .about-quality__grid {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .about-quality__lede {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-body);
}

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

.page-about .cert {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  background: rgba(19, 26, 51, 0.62);
  border: 1px solid var(--c-line);
  border-radius: var(--about-radius-sm);
  transition: border-color var(--t-fast) var(--ease);
}

.page-about .cert:hover { border-color: var(--c-cyan); }

.page-about .cert__icon {
  flex: none;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  fill: none;
  stroke: var(--c-cyan);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .cert__name {
  margin: 0;
  font-size: 15px;
  color: var(--c-text);
}

.page-about .cert__text {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-mute);
}

.page-about .about-quality__figure {
  margin: 0;
}

.page-about .about-quality__figure .figure__frame {
  overflow: hidden;
  background: var(--c-layer);
  border: 1px solid var(--c-line);
  border-radius: 24px 24px 8px 24px;
}

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

.page-about .about-quality__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mute);
}

/* 内容生态 */
.page-about .about-eco__grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .eco {
  padding: 26px 24px;
  background: linear-gradient(200deg, rgba(123, 92, 255, 0.12), rgba(5, 7, 14, 0) 58%), var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 10px 28px 28px 28px;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .eco:hover {
  border-color: var(--c-violet);
  transform: translateY(-3px);
}

.page-about .eco__name {
  margin: 0;
  font-size: 19px;
  color: var(--c-text);
}

.page-about .eco__text {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-about .eco__meta {
  margin: 16px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.page-about .about-eco__awards {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px dashed var(--c-line);
  border-radius: var(--about-radius);
}

.page-about .about-eco__awards-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-mute);
}

.page-about .about-eco__awards-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 接下来的方向与行动区 */
.page-about .about-next__grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .step {
  padding: 24px 22px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-cyan);
  border-radius: 6px var(--about-radius) var(--about-radius) var(--about-radius);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .step:nth-child(2) { border-left-color: var(--c-violet); }
.page-about .step:nth-child(3) { border-left-color: var(--c-amber); }

.page-about .step:hover {
  transform: translateY(-3px);
}

.page-about .step__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-mute);
}

.page-about .step__title {
  margin: 12px 0 0;
  font-size: 19px;
  color: var(--c-text);
}

.page-about .step__text {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-about .about-cta {
  display: grid;
  gap: 22px;
  margin-top: 34px;
  padding: 30px 26px;
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(43, 227, 224, 0.14), transparent 58%),
    linear-gradient(180deg, rgba(19, 26, 51, 0.9), rgba(11, 16, 32, 0.96));
  border: 1px solid var(--c-line);
  border-radius: 28px 28px 28px 8px;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: 22px;
  color: var(--c-text);
}

.page-about .about-cta__desc {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--c-body);
}

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

@media (min-width: 720px) {
  .page-about .about-lines__grid,
  .page-about .about-team__grid,
  .page-about .about-eco__grid,
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cta {
    padding: 36px 34px;
  }
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 84px 0;
  }

  .page-about .about-hero {
    padding: calc(var(--shell-h) + 52px) 0 72px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 52px;
  }

  .page-about .about-scale {
    position: relative;
    padding-top: 22px;
  }

  .page-about .about-scale::before {
    content: "";
    position: absolute;
    top: 10px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--c-cyan), var(--c-violet) 58%, var(--c-line));
    opacity: 0.6;
  }

  .page-about .milestone {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    padding: 26px 30px 26px 32px;
  }

  .page-about .milestone__title {
    margin-top: 0;
  }

  .page-about .about-quality__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 48px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1120px) {
  .page-about .about-lines__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .crew,
  .page-about .eco,
  .page-about .step,
  .page-about .milestone {
    transition: none;
  }

  .page-about .about-line:hover,
  .page-about .crew:hover,
  .page-about .eco:hover,
  .page-about .step:hover {
    transform: none;
  }
}