.page-about {
  --about-soft: rgba(242, 234, 217, 0.74);
  --about-soft-2: rgba(242, 234, 217, 0.58);
  --about-panel: rgba(15, 20, 28, 0.72);
  --about-ink-soft: rgba(20, 24, 30, 0.76);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px) 0 clamp(34px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  left: -25%;
  right: -25%;
  height: min(66vh, 560px);
  background:
    linear-gradient(118deg, rgba(39, 245, 211, 0.16), rgba(139, 92, 246, 0.12) 52%, rgba(7, 10, 15, 0) 76%),
    repeating-linear-gradient(90deg, rgba(42, 53, 66, 0.55) 0 1px, transparent 1px 96px);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  margin-bottom: clamp(20px, 3.6vw, 34px);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--cyan);
  display: inline-block;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.2vw, 4.35rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.012em;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-hero__title-line {
  display: block;
  color: var(--paper);
  background: linear-gradient(92deg, var(--cyan), var(--paper) 78%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-stat {
  padding: 16px 14px 18px;
  background: rgba(15, 20, 28, 0.94);
  transition: background 200ms var(--ease);
}

.page-about .about-stat:hover {
  background: rgba(39, 245, 211, 0.08);
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.4vw, 1.75rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  font-size: 0.62em;
  margin-left: 2px;
  color: var(--paper);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* 章节骨架 */
.page-about .about-body {
  padding: clamp(30px, 5vw, 64px) 0 clamp(40px, 7vw, 88px);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
}

.page-about .about-index {
  border: 1px solid var(--hair);
  border-radius: 4px;
  background: var(--about-panel);
  padding: 12px;
}

.page-about .about-index__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--steel);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--about-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 2px;
  transition: color 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  background: rgba(39, 245, 211, 0.08);
  border-left-color: var(--cyan);
}

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

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--violet);
}

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

.page-about .about-section {
  padding: clamp(26px, 4vw, 42px) 0;
  border-top: 1px solid var(--hair);
  scroll-margin-top: 120px;
}

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

.page-about .about-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 14px;
}

.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.12;
  color: var(--paper);
  max-width: 24ch;
}

.page-about .about-section__lead {
  max-width: 70ch;
  margin: 0 0 20px;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.78;
  color: var(--about-soft);
}

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

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  margin: 0 0 26px;
  padding: 6px 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 58%, var(--hair));
}

.page-about .about-node {
  position: relative;
  padding-bottom: 22px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(39, 245, 211, 0.1);
  transition: box-shadow 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-node:hover::before,
.page-about .about-node:focus-within::before {
  border-color: var(--mint);
  box-shadow: 0 0 0 7px rgba(39, 245, 211, 0.16);
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-node__title {
  margin: 0 0 6px;
  font-size: 1.03rem;
  font-weight: 600;
  color: var(--paper);
  transition: color 180ms var(--ease);
}

.page-about .about-node:hover .about-node__title {
  color: var(--cyan);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* 图片 */
.page-about .about-figure {
  margin: 0 0 22px;
}

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

.page-about .about-figure .media-frame {
  margin: 0;
  border: 1px solid var(--hair);
  border-radius: 4px;
  overflow: hidden;
  background: var(--booth);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.03);
}

.page-about .about-figure .media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--about-soft-2);
}

/* 数据条 */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 22px;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-metric {
  padding: 16px 14px 18px;
  background: var(--booth);
  transition: background 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-metric:hover {
  background: rgba(39, 245, 211, 0.07);
  transform: translateY(-2px);
}

.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
  line-height: 1.05;
  color: var(--paper);
}

.page-about .about-metric__unit {
  margin-left: 2px;
  font-size: 0.62em;
  color: var(--orange);
}

.page-about .about-metric__cap {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* 团队 */
.page-about .about-roles {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  padding: 14px 16px;
  border: 1px solid var(--hair);
  border-left: 2px solid var(--cyan);
  border-radius: 0 3px 3px 0;
  background: var(--about-panel);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-role:hover {
  background: rgba(15, 20, 28, 0.92);
  border-color: rgba(39, 245, 211, 0.55);
}

.page-about .about-role--violet { border-left-color: var(--violet); }
.page-about .about-role--orange { border-left-color: var(--orange); }
.page-about .about-role--mint { border-left-color: var(--mint); }

.page-about .about-role__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-soft);
}

/* 协作生态 */
.page-about .about-eco__grid {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.page-about .about-eco__cell {
  padding: 16px;
  border: 1px solid var(--hair);
  border-radius: 4px;
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.12), rgba(15, 20, 28, 0) 72%),
    var(--booth);
  transition: border-color 200ms var(--ease);
}

.page-about .about-eco__cell:hover {
  border-color: var(--violet);
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5vw, 2rem);
  line-height: 1;
  color: var(--violet);
}

.page-about .about-eco__title {
  margin: 10px 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* 覆盖与场景 */
.page-about .about-scenes {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-scene {
  padding: 14px 16px;
  border: 1px solid var(--hair);
  border-top: 2px solid var(--cyan);
  border-radius: 0 0 4px 4px;
  background: var(--about-panel);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-scene:nth-child(2) { border-top-color: var(--violet); }
.page-about .about-scene:nth-child(3) { border-top-color: var(--orange); }

.page-about .about-scene:hover {
  transform: translateY(-2px);
}

.page-about .about-scene__title {
  margin: 0 0 6px;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .about-coveline {
  margin: 0;
  padding: 12px 14px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 122, 26, 0.08);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-soft);
}

.page-about .about-coveline strong {
  font-family: var(--font-mono);
  font-size: 1.05em;
  color: var(--orange);
  font-weight: 700;
}

/* 纸面章节 */
.page-about .about-section--paper {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 4vw, 38px);
  border: 0;
  border-radius: 6px;
  background:
    repeating-linear-gradient(0deg, rgba(20, 24, 30, 0.045) 0 1px, transparent 1px 34px),
    var(--paper);
  color: var(--ink-on-paper);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.4);
}

.page-about .about-section--paper .about-section__title {
  color: var(--ink-on-paper);
  max-width: 26ch;
}

.page-about .about-section--paper .about-section__num {
  color: #5b3fbf;
}

.page-about .about-case {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin: 0 0 20px;
  padding: 14px 16px;
  border: 1px dashed rgba(20, 24, 30, 0.4);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.4);
}

.page-about .about-case__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #5b3fbf;
  border: 1px solid #5b3fbf;
  border-radius: 2px;
  padding: 2px 6px;
}

.page-about .about-case__text {
  margin: 0;
  flex: 1 1 240px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .about-principles {
  display: grid;
  gap: 14px;
}

.page-about .about-principle {
  padding-top: 10px;
  border-top: 2px solid var(--ink-on-paper);
}

.page-about .about-principle__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--ink-on-paper);
}

.page-about .about-principle__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

.page-about .about-paper__more {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(20, 24, 30, 0.18);
  font-size: 14px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-paper__more a {
  color: var(--ink-on-paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 24, 30, 0.45);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-paper__more a:hover,
.page-about .about-paper__more a:focus-visible {
  color: #5b3fbf;
  border-bottom-color: #5b3fbf;
}

.page-about .about-paper__more a:focus-visible {
  outline: 2px solid #5b3fbf;
  outline-offset: 2px;
}

/* 断点 */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(280px, 0.82fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 108px;
    padding: 16px 12px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-index__link {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-metric,
  .page-about .about-scene,
  .page-about .about-node__title,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .about-metric:hover,
  .page-about .about-scene:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>