.page-about {
  --about-soft: #4A5560;
  --about-space: clamp(48px, 7vw, 88px);
  background: var(--ink);
  color: var(--fog);
  overflow-x: clip;
}

.page-about a:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--bar) + 36px);
  padding-bottom: clamp(36px, 6vw, 72px);
  background:
    radial-gradient(circle at 82% 12%, rgba(255, 77, 31, 0.28), transparent 42%),
    radial-gradient(circle at 96% 86%, rgba(45, 140, 255, 0.2), transparent 46%),
    repeating-linear-gradient(0deg, rgba(244, 247, 250, 0.035) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg, rgba(244, 247, 250, 0.035) 0 1px, transparent 1px 56px),
    var(--ink);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .breadcrumb a {
  color: var(--fog);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--flame);
}

.page-about .breadcrumb__sep {
  color: var(--ink-3);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: end;
  margin-top: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--sand);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  max-width: 13em;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8.6vw, 5rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.025em;
}

.page-about .about-hero__lead {
  max-width: 38em;
  margin: 0;
  font-size: clamp(1rem, 1.7vw, 1.125rem);
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  min-height: 168px;
  padding-bottom: 8px;
}

.page-about .about-hero__year {
  font-size: clamp(5rem, 22vw, 11rem);
  font-weight: 800;
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: transparent;
  background: linear-gradient(160deg, var(--flame), var(--ember) 54%, var(--sand));
  -webkit-background-clip: text;
  background-clip: text;
  transform: skewX(-6deg);
}

.page-about .about-hero__slash {
  display: block;
  width: min(180px, 46vw);
  height: 2px;
  margin: 22px 0 14px;
  background: linear-gradient(90deg, var(--flame), transparent);
  transform: rotate(-14deg);
  transform-origin: left center;
}

.page-about .about-hero__caption {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 40px 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(244, 247, 250, 0.16);
}

.page-about .about-facts dt {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--fog);
}

.page-about .about-facts dd .mono {
  color: var(--flame);
}

/* 主体骨架 */
.page-about .about-shell {
  display: grid;
  gap: 28px;
  padding-block: var(--about-space);
  min-width: 0;
}

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

/* 索引 */
.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-about .about-index ol {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--ink-3);
  border-radius: 999px;
  font-size: 0.8125rem;
  white-space: nowrap;
  color: var(--steel);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .about-index a:hover {
  border-color: var(--flame);
  color: var(--fog);
}

.page-about .about-index a .mono {
  color: var(--flame);
}

/* 章节 */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--bar) + 24px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: var(--about-space);
  padding-top: var(--about-space);
  border-top: 1px solid rgba(138, 154, 168, 0.16);
}

.page-about .about-chapter__head {
  margin-bottom: 18px;
}

.page-about .about-chapter__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.page-about .about-chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__intro {
  max-width: 38em;
  margin: 0 0 24px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.68);
}

/* 起源 */
.page-about .about-origin {
  display: grid;
  gap: 28px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(244, 247, 250, 0.78);
}

.page-about .about-origin__lead {
  font-size: 1.0625rem !important;
  color: var(--fog) !important;
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--steel);
}

/* 时间轴 */
.page-about .about-timeline {
  display: flex;
  gap: 14px;
  margin-top: 4px;
  padding: 4px 4px 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-3) transparent;
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 4px;
}

.page-about .about-timeline__card {
  display: flex;
  flex-direction: column;
  flex: 0 0 min(78vw, 292px);
  min-height: 216px;
  padding: 22px;
  scroll-snap-align: start;
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .about-timeline__card::before {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  margin-bottom: 18px;
  background: var(--flame);
}

.page-about .about-timeline__card:nth-child(2)::before {
  background: var(--volt);
}

.page-about .about-timeline__card:nth-child(3)::before {
  background: var(--sand);
}

.page-about .about-timeline__card:nth-child(4)::before {
  background: var(--turf);
}

.page-about .about-timeline__card:nth-child(5)::before {
  background: var(--flame);
}

.page-about .about-timeline__card:hover {
  border-color: var(--flame);
  background: #1A222B;
}

.page-about .about-timeline__year {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .about-timeline__card h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-about .about-timeline__card p {
  flex: 1;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: rgba(244, 247, 250, 0.68);
}

.page-about .about-timeline__hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--steel);
}

/* 编辑台浅色面板 */
.page-about .about-light-panel {
  margin-top: 22px;
  padding: clamp(20px, 4vw, 44px);
  background: var(--fog);
  color: var(--ink);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-light-panel .about-chapter__kicker {
  color: #5C6B78;
}

.page-about .about-light-panel .about-chapter__intro {
  color: var(--about-soft);
}

.page-about .about-steps {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}

.page-about .about-step__num {
  display: block;
  margin-bottom: 8px;
  font-size: 0.75rem;
  color: var(--ember);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  line-height: 1.4;
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--about-soft);
}

.page-about .about-figure--wide {
  margin-top: 32px;
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-team__copy p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(244, 247, 250, 0.78);
}

.page-about .about-team__split {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__split li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .about-team__num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.page-about .about-team__num--volt {
  color: var(--volt);
}

.page-about .about-team__num--flame {
  color: var(--flame);
}

.page-about .about-team__num--sand {
  color: var(--sand);
}

.page-about .about-team__split li > span:last-child {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--steel);
}

.page-about .about-ring-wrap {
  max-width: 300px;
  margin: 0 auto;
}

.page-about .about-ring {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-ring__seg {
  transition: stroke-width 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-about .about-ring__seg:hover {
  stroke-width: 20;
}

.page-about .about-ring__num {
  fill: var(--fog);
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
}

.page-about .about-ring__unit {
  fill: var(--steel);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.75rem;
  color: var(--steel);
}

.page-about .about-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-about .about-legend__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.page-about .about-legend__dot--volt {
  background: var(--volt);
}

.page-about .about-legend__dot--flame {
  background: var(--flame);
}

.page-about .about-legend__dot--sand {
  background: var(--sand);
}

/* 协作伙伴 */
.page-about .about-partners {
  display: grid;
  gap: 24px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px dashed var(--ink-3);
}

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

.page-about .about-partners__copy p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.7);
}

.page-about .about-partners__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__tags .tag {
  font-size: 0.75rem;
}

.page-about .about-figure--partners img {
  aspect-ratio: 10 / 7;
}

/* 服务 */
.page-about .about-service {
  display: grid;
  gap: 16px;
}

.page-about .about-service__card {
  position: relative;
  padding: 22px;
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-service__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--flame);
}

.page-about .about-service__card:nth-child(2)::before {
  background: var(--volt);
}

.page-about .about-service__card:nth-child(3)::before {
  background: var(--turf);
}

.page-about .about-service__label {
  margin: 0 0 10px;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.page-about .about-service__figure {
  margin: 0 0 12px;
  font-size: clamp(1.75rem, 4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--fog);
}

.page-about .about-service__card:nth-child(3) .about-service__figure {
  color: var(--sand);
}

.page-about .about-service__card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.page-about .about-service__card p {
  margin: 0 0 16px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(244, 247, 250, 0.68);
}

.page-about .about-service__link {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--volt);
  text-decoration: none;
}

.page-about .about-service__link:hover {
  color: var(--fog);
}

/* 信任收尾 */
.page-about .about-trust {
  padding: clamp(24px, 5vw, 52px);
  background:
    linear-gradient(135deg, rgba(255, 77, 31, 0.16), rgba(45, 140, 255, 0.12)),
    var(--ink-2);
  border: 1px solid var(--ink-3);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-trust__list {
  display: grid;
  gap: 22px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-trust__num {
  display: block;
  margin-bottom: 8px;
  font-size: 0.75rem;
  color: var(--flame);
}

.page-about .about-trust__list h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.page-about .about-trust__list p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(244, 247, 250, 0.7);
}

.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-trust__note {
  margin: 20px 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-trust__note a {
  color: var(--volt);
  text-decoration: none;
}

.page-about .about-trust__note a:hover {
  color: var(--fog);
}

/* 桌面布局 */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: calc(var(--bar) + 64px);
    padding-bottom: 80px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: 48px;
  }

  .page-about .about-hero__visual {
    align-items: flex-end;
    min-height: 260px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 56px;
  }

  .page-about .about-shell {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--bar) + 24px);
    align-self: start;
  }

  .page-about .about-index ol {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-index a {
    width: 100%;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid var(--ink-3);
    border-radius: 0;
    font-size: 0.8125rem;
  }

  .page-about .about-index a:hover {
    border-left-color: var(--flame);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-timeline__card {
    flex-basis: 300px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .about-service {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-trust__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}
<<<END>>>