.page-about {
  --about-line: rgba(247, 242, 232, 0.14);
  --about-soft: rgba(247, 242, 232, 0.68);
  background-color: var(--ink);
  background-image:
    radial-gradient(760px 520px at 84% -6%, rgba(245, 166, 35, 0.18), transparent 62%),
    repeating-linear-gradient(90deg, rgba(247, 242, 232, 0.028) 0 1px, transparent 1px 110px);
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .mono {
  font-family: var(--font-mono);
}

/* 面包屑 */
.page-about .breadcrumbs {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(16px, 3vw, 28px) var(--gutter) 0;
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}
.page-about .breadcrumbs__link {
  color: var(--about-soft);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-about .breadcrumbs__link:hover,
.page-about .breadcrumbs__link:focus-visible {
  color: var(--sun);
}
.page-about .breadcrumbs__sep {
  color: rgba(247, 242, 232, 0.34);
}

/* 首屏 */
.page-about .about-hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 36px) var(--gutter) 0;
}
.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cool);
}
.page-about .about-hero__title {
  margin: clamp(12px, 2vw, 20px) 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--warm);
}
.page-about .about-hero__title span {
  display: block;
  margin-top: 0.26em;
  font-size: clamp(19px, 3.4vw, 40px);
  letter-spacing: 0.01em;
  color: var(--sun);
}
.page-about .about-hero__lede {
  max-width: 60ch;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--about-soft);
}

/* 首屏数据条 */
.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: rgba(22, 40, 61, 0.86);
}
.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.1;
  color: var(--sun);
}
.page-about .about-stats__label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--about-soft);
}

/* 图片容器 */
.page-about .image-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--ink-2);
}
.page-about .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .image-frame__caption {
  padding: 10px 12px 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(247, 242, 232, 0.55);
}
.page-about .about-hero__figure {
  margin-top: clamp(24px, 3.6vw, 44px);
}

/* 章节索引 */
.page-about .about-index {
  position: sticky;
  top: 0;
  z-index: 6;
  margin-top: clamp(28px, 5vw, 56px);
  background: rgba(7, 17, 28, 0.94);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  backdrop-filter: blur(10px);
}
.page-about .about-index__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 14px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index__inner::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__label {
  display: none;
  flex: none;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 242, 232, 0.42);
}
.page-about .about-index__list {
  display: flex;
  gap: clamp(14px, 2.4vw, 34px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 15px 0;
  white-space: nowrap;
  font-family: var(--font-heading);
  font-size: 14px;
  color: rgba(247, 242, 232, 0.72);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .about-index__list a .mono {
  font-size: 11px;
  color: var(--sun);
}
.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--warm);
  border-bottom-color: var(--sun);
}

/* 章节通用 */
.page-about .about-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(44px, 7vw, 96px) var(--gutter) 0;
  scroll-margin-top: 80px;
}
.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(10px, 2vw, 24px);
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.page-about .about-section__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(44px, 9vw, 108px);
  line-height: 0.78;
  letter-spacing: -0.03em;
  color: rgba(245, 166, 35, 0.4);
}
.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--warm);
}
.page-about .section-lede {
  max-width: 56ch;
  margin: 10px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--about-soft);
}
.page-about .about-section__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 68ch;
  font-size: 15px;
  color: var(--about-soft);
}
.page-about .about-section__foot a {
  color: var(--sun);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 166, 35, 0.45);
}
.page-about .about-section__foot a:hover,
.page-about .about-section__foot a:focus-visible {
  color: var(--amber);
}

/* 01 起点 */
.page-about .about-origin {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}
.page-about .about-origin__text p {
  margin: 0 0 1em;
  color: var(--about-soft);
}
.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
}
.page-about .about-origin__panel {
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid rgba(245, 166, 35, 0.28);
  background: linear-gradient(160deg, rgba(245, 166, 35, 0.12), rgba(14, 27, 44, 0.72) 62%);
}
.page-about .about-origin__panel h3 {
  margin: 0 0 16px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--sun);
}
.page-about .origin-facts {
  margin: 0;
  display: grid;
  gap: 12px;
}
.page-about .origin-facts div {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(247, 242, 232, 0.16);
}
.page-about .origin-facts div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .origin-facts dt {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247, 242, 232, 0.5);
}
.page-about .origin-facts dd {
  margin: 0;
  font-size: 15px;
  color: var(--warm);
}

/* 02 时间轴 */
.page-about .stage-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .stage-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--sun) 0%, rgba(245, 166, 35, 0.2) 72%, transparent 100%);
}
.page-about .stage-node {
  position: relative;
  padding-left: 32px;
  padding-bottom: clamp(24px, 4vw, 40px);
}
.page-about .stage-node:last-child {
  padding-bottom: 0;
}
.page-about .stage-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.16);
}
.page-about .stage-node__meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cool);
}
.page-about .stage-node__card {
  padding: clamp(16px, 2.4vw, 26px);
  background: rgba(22, 40, 61, 0.72);
  border-left: 2px solid rgba(245, 166, 35, 0.42);
}
.page-about .stage-node__title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: 0.02em;
  color: var(--warm);
}
.page-about .stage-node__card p {
  margin: 0;
  font-size: 15px;
  color: var(--about-soft);
}
.page-about .stage-node__points {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
}
.page-about .stage-node__points li {
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
  border: 1px solid rgba(46, 196, 182, 0.4);
}

/* 03 团队 */
.page-about .crew-layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-about .crew-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .crew-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 16px;
  padding: 16px 18px;
  background: rgba(22, 40, 61, 0.8);
  border-left: 3px solid rgba(245, 166, 35, 0.34);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-about .crew-item:hover,
.page-about .crew-item:focus-within {
  border-left-color: var(--sun);
  background: #1b3049;
}
.page-about .crew-item__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.03em;
  color: var(--warm);
}
.page-about .crew-item__num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--sun);
}
.page-about .crew-item__bar {
  grid-column: 1 / -1;
  height: 4px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(247, 242, 232, 0.12);
}
.page-about .crew-item__bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--sun), var(--amber));
}
.page-about .crew-item:nth-child(1) .crew-item__bar i { width: 46%; }
.page-about .crew-item:nth-child(2) .crew-item__bar i { width: 31%; }
.page-about .crew-item:nth-child(3) .crew-item__bar i { width: 38%; }
.page-about .crew-item:nth-child(4) .crew-item__bar i { width: 100%; }
.page-about .crew-item:nth-child(5) .crew-item__bar i { width: 46%; }
.page-about .crew-item__note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-soft);
}
.page-about .crew-figure {
  align-self: start;
}

/* 04 覆盖 */
.page-about .reach-layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-about .reach-body p {
  margin: 0 0 1em;
  color: var(--about-soft);
}
.page-about .reach-figures {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .reach-figures li {
  padding: 14px 16px;
  background: rgba(22, 40, 61, 0.86);
}
.page-about .reach-figures strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 500;
  line-height: 1.2;
  color: var(--amber);
}
.page-about .reach-figures span {
  font-size: 13px;
  color: var(--about-soft);
}

/* 05 节奏 */
.page-about .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .rhythm-item {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  background: rgba(22, 40, 61, 0.6);
  border: 1px solid rgba(247, 242, 232, 0.08);
}
.page-about .rhythm-item__cycle {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--sun);
}
.page-about .rhythm-item h3 {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--warm);
}
.page-about .rhythm-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* 06 观察 */
.page-about .insight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .insight-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(247, 242, 232, 0.1);
}
.page-about .insight-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .insight-item__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--sun);
}
.page-about .insight-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--warm);
}
.page-about .insight-item p {
  margin: 0;
  font-size: 15px;
  color: var(--about-soft);
}
.page-about .insight-item a {
  color: var(--sun);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 166, 35, 0.45);
}
.page-about .insight-item a:hover,
.page-about .insight-item a:focus-visible {
  color: var(--amber);
}

/* CTA */
.page-about .about-cta {
  max-width: var(--container);
  margin: clamp(40px, 6vw, 80px) auto 0;
  padding: 0 var(--gutter);
}
.page-about .about-cta__panel {
  display: grid;
  gap: 20px;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid rgba(245, 166, 35, 0.35);
  background: linear-gradient(150deg, rgba(245, 166, 35, 0.16), rgba(14, 27, 44, 0.88) 62%);
}
.page-about .about-cta__panel h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  color: var(--warm);
}
.page-about .about-cta__panel p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  color: var(--about-soft);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 渐进显现：基础可见，脚本补充 .is-revealed 时平滑过渡 */
.page-about [data-reveal] {
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-hero__title,
  .page-about .about-hero__lede,
  .page-about .about-stats {
    animation: about-in 0.5s var(--ease) both;
  }
  .page-about .about-hero__lede {
    animation-delay: 0.08s;
  }
  .page-about .about-stats {
    animation-delay: 0.16s;
  }
}

@keyframes about-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__title,
  .page-about .about-hero__lede,
  .page-about .about-stats {
    animation: none;
  }
  .page-about [data-reveal] {
    transition: none;
  }
}

/* 宽屏布局 */
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-index__label {
    display: inline-block;
  }
  .page-about .rhythm-item {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: start;
    padding: 20px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .crew-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
  .page-about .reach-layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: center;
  }
  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-about .stage-track {
    padding-left: 12px;
  }
}
<<<END>>>