.page-about {
  background: var(--ink-900);
  color: var(--warm);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-block: clamp(1rem, 3vw, 1.75rem) 0;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.75rem, 5vw, 3.25rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -22%;
  width: 64%;
  height: 128%;
  background:
    linear-gradient(158deg, rgba(47, 243, 208, 0.11), rgba(108, 92, 231, 0.06) 52%, transparent 76%);
  border-left: 1px solid var(--ink-700);
  transform: skewX(calc(-1 * var(--slant)));
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-64);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0.5em 0 0.55em;
  max-width: 22ch;
}

.page-about .about-hero__lede {
  max-width: 36em;
  color: var(--fog);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-about .about-stat {
  border-top: 1px solid var(--ink-700);
  padding-top: 0.75rem;
}

.page-about .about-stat .data__value {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--warm);
  display: inline;
}

.page-about .about-stat .data__unit {
  font-family: var(--font-data);
  font-size: var(--fs-13);
  color: var(--cyan);
  margin-left: 0.15em;
}

.page-about .about-stat .data__label {
  display: block;
  margin-top: 0.4rem;
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--fog);
}

/* 正文与锚点 */
.page-about .about-frame {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-flow {
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  padding-block: clamp(2.25rem, 5.5vw, 4rem);
  border-top: 1px solid var(--ink-700);
}

.page-about .about-flow > .about-chapter:first-child {
  border-top: 0;
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  gap: 0.35rem;
  margin-bottom: 1.35rem;
}

.page-about .about-chapter__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: rgba(47, 243, 208, 0.16);
  display: block;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-40);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--warm);
}

.page-about .about-prose {
  max-width: 720px;
  color: var(--fog);
  font-size: 1.0625rem;
  line-height: 1.85;
}

.page-about .about-chapter--wide .about-prose {
  max-width: 980px;
}

.page-about .about-prose p {
  margin: 0 0 1.1em;
}

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

.page-about .about-note {
  margin: 1.5rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--ink-700);
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--fog);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: 2rem;
  align-items: start;
}

.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-bar__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.45rem;
}

.page-about .about-bar__name {
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--fog);
}

.page-about .about-bar__count {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-13);
  color: var(--warm);
}

.page-about .about-bar__track {
  height: 6px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  background: var(--cyan);
  transition: width var(--t-mid) var(--ease), filter var(--t-fast) var(--ease);
}

.page-about .about-bar:hover .about-bar__fill,
.page-about .about-bar:focus-within .about-bar__fill {
  filter: brightness(1.3);
}

.page-about .about-bar--b .about-bar__fill { background: var(--orange); }
.page-about .about-bar--c .about-bar__fill { background: var(--mist); }
.page-about .about-bar--d .about-bar__fill { background: var(--violet); }

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
}

.page-about .about-figure figcaption {
  margin-top: 0.7rem;
  font-size: var(--fs-13);
  line-height: 1.65;
  color: var(--fog);
}

.page-about .about-figure--wide {
  margin-top: 2rem;
}

/* 覆盖与服务联系 */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  margin-top: 2rem;
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
}

.page-about .about-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(112deg, rgba(5, 15, 30, 0.94) 32%, rgba(5, 15, 30, 0.55) 68%, rgba(5, 15, 30, 0.86));
  pointer-events: none;
}

.page-about .about-cover__body {
  position: relative;
  z-index: 1;
}

.page-about .about-cover__text {
  margin: 0 0 1.75rem;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--warm);
}

.page-about .about-contact {
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(167, 182, 200, 0.3);
  display: grid;
  gap: 0.75rem;
  max-width: 40em;
}

.page-about .about-contact__row {
  display: grid;
  gap: 0.15rem;
}

.page-about .about-contact dt {
  font-size: var(--fs-13);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-contact dd {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--warm);
  word-break: break-word;
}

/* 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0 0 0 clamp(1.25rem, 3vw, 1.75rem);
  border-left: 1px solid var(--ink-700);
  display: grid;
  gap: 1.9rem;
  max-width: 980px;
}

.page-about .about-timeline__item {
  position: relative;
  outline-offset: 6px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(1.25rem, 3vw, 1.75rem) - 4.5px);
  top: 0.5em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-900);
  transition: background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before,
.page-about .about-timeline__item:focus::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 208, 0.14);
}

.page-about .about-timeline__item:focus {
  outline: 2px solid var(--cyan);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-13);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-timeline__name {
  margin: 0.3rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-timeline__desc {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-timeline__note {
  margin: 0.6rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--ink-700);
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--fog);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__note,
.page-about .about-timeline__item:focus .about-timeline__note,
.page-about .about-timeline__item:focus-within .about-timeline__note {
  border-left-color: var(--orange);
  color: var(--warm);
  transform: translateX(4px);
}

/* 合作与认可 */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-fact {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}

.page-about .about-fact:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-about .about-fact__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 1.875rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-fact__label {
  font-size: var(--fs-13);
  letter-spacing: 0.14em;
  color: var(--warm);
}

.page-about .about-fact__text {
  margin: 0.15rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--fog);
}

/* 工作原则 */
.page-about .about-principles {
  margin-top: 1.75rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--warm);
  color: var(--ink-deep);
  border-left: 3px solid var(--orange);
}

.page-about .about-principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.15rem 0;
  border-top: 1px solid rgba(3, 16, 31, 0.14);
}

.page-about .about-principle:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-principle:last-child {
  padding-bottom: 0;
}

.page-about .about-principle__idx {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 0.35rem;
}

.page-about .about-principle h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(3, 16, 31, 0.82);
}

/* 收尾 */
.page-about .about-cta {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--ink-700);
}

.page-about .about-cta__text {
  margin: 0 0 1.1rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--fog);
  max-width: 34em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* 锚点目录 */
.page-about .about-anchor {
  display: none;
}

@media (min-width: 600px) {
  .page-about .about-chapter__head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(0.75rem, 2vw, 1.5rem);
  }

  .page-about .about-chapter__num {
    line-height: 0.78;
  }

  .page-about .about-contact__row {
    grid-template-columns: 8.5em minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-frame {
    grid-template-columns: minmax(0, 1fr) 190px;
    column-gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-anchor {
    display: block;
    position: sticky;
    top: 96px;
    padding-top: clamp(1.5rem, 4vw, 2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-bar__fill,
  .page-about .about-fact,
  .page-about .about-timeline__note {
    transition: none;
  }

  .page-about .about-fact:hover,
  .page-about .about-timeline__item:hover .about-timeline__note {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}