.page-about {
  --about-line: rgba(11, 31, 26, .16);
  --about-line-soft: rgba(11, 31, 26, .08);
  --about-mist-line: rgba(201, 210, 204, .18);
  background: var(--cream);
  color: var(--char);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 30px) 0 clamp(42px, 6vw, 80px);
  background: var(--ink);
  color: var(--cream);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 210, 204, .07) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(201, 210, 204, .05) 0 1px, transparent 1px 88px),
    radial-gradient(120% 80% at 84% 0%, rgba(77, 245, 210, .16), transparent 62%),
    radial-gradient(90% 70% at 6% 100%, rgba(255, 154, 60, .12), transparent 66%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-line), transparent);
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumbs a {
  color: var(--mist);
}

.page-about .about-hero .crumbs a:hover {
  color: var(--cyan);
}

.page-about .about-hero .crumbs li[aria-current="page"] {
  color: var(--cyan);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(18px, 2.4vw, 30px);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -.012em;
  text-wrap: balance;
  color: var(--cream);
}

.page-about .about-hero__deck {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.9;
  color: rgba(243, 239, 228, .8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__panel {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--cyan-line);
  background: rgba(16, 19, 20, .58);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 36px;
  height: 2px;
  background: var(--cyan);
}

.page-about .hero-panel__head {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .hero-panel__list {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-panel__list li {
  display: grid;
  grid-template-columns: 4.4em 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px dashed rgba(201, 210, 204, .16);
}

.page-about .hero-panel__list li:last-child {
  border-bottom: 0;
}

.page-about .hero-panel__num {
  font-size: 21px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .02em;
}

.page-about .hero-panel__txt {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(243, 239, 228, .78);
}

.page-about .hero-panel__foot {
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(201, 210, 204, .12);
  font-size: 13px;
}

.page-about .hero-panel__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 245, 210, .4);
  padding-bottom: 2px;
}

.page-about .hero-panel__foot a:hover {
  color: var(--orange);
  border-bottom-color: rgba(255, 154, 60, .5);
}

.page-about .about-body {
  padding: clamp(30px, 5vw, 62px) 0 clamp(46px, 7vw, 92px);
}

.page-about .about-body__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

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

.page-about .sec {
  padding-bottom: clamp(32px, 4.6vw, 60px);
}

.page-about .sec + .sec {
  padding-top: clamp(28px, 4vw, 52px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .sec__index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .sec__index::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.page-about .sec h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.16;
  letter-spacing: -.006em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .sec p {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.88;
  color: #1d2724;
}

.page-about .sec p a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
}

.page-about .sec p a:hover {
  color: #0a6a5b;
  border-bottom-color: var(--ink);
}

.page-about .sec h3 {
  margin: 6px 0 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--about-line);
  background: var(--moss);
}

.page-about figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-caption {
  margin: 0;
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .03em;
  line-height: 1.6;
  color: var(--mist);
  background: var(--moss);
  border-top: 1px solid rgba(201, 210, 204, .14);
}

/* 时间轴 */
.page-about .about-timeline {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline > li {
  position: relative;
  margin-left: 8px;
  padding: 0 0 clamp(20px, 2.6vw, 28px) clamp(22px, 3vw, 30px);
  border-left: 1px solid rgba(11, 31, 26, .18);
}

.page-about .about-timeline > li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  border: 1px solid var(--ink);
}

.page-about .about-timeline > li:last-child::before {
  background: var(--orange);
}

.page-about .timeline__stage {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .about-timeline p:not(.timeline__stage) {
  margin-top: 6px;
  font-size: 15px;
  line-height: 1.8;
  color: #29332f;
}

/* 团队折叠组 */
.page-about .team-groups {
  margin-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--about-line);
}

.page-about .team-row {
  border-bottom: 1px solid var(--about-line);
}

.page-about .team-row .disclosure-btn {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  width: 100%;
  padding: 15px 0;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--ink);
}

.page-about .team-row .disclosure-btn:hover {
  background: rgba(77, 245, 210, .07);
}

.page-about .team-row .disclosure-btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .team-row__code {
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .1em;
}

.page-about .team-row__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: .01em;
}

.page-about .team-row__hint {
  flex: 1 1 100%;
  font-size: 12.5px;
  color: var(--slate);
  letter-spacing: .02em;
}

.page-about .team-row .disclosure-panel {
  padding: 0 0 18px 0;
  font-size: 15px;
  line-height: 1.82;
  color: #29332f;
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
}

/* 覆盖区 */
.page-about .sec--coverage {
  position: relative;
  margin-top: clamp(26px, 3.4vw, 42px);
  padding: clamp(22px, 3.4vw, 38px);
  background: var(--ink);
  border: 1px solid rgba(77, 245, 210, .22);
  color: var(--cream);
}

.page-about .sec--coverage::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-about .sec--coverage h2 {
  color: var(--cream);
}

.page-about .sec--coverage h3 {
  color: var(--cream);
}

.page-about .sec--coverage p {
  color: rgba(243, 239, 228, .78);
}

.page-about .metric-strip {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 2.4vw, 26px);
  background: var(--about-mist-line);
}

.page-about .metric {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 16px 16px 18px;
  background: var(--moss);
}

.page-about .metric__num {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .metric__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(243, 239, 228, .74);
}

.page-about .sec--coverage figure {
  border-color: rgba(201, 210, 204, .2);
}

.page-about .sec--coverage .media-caption {
  background: var(--char);
}

.page-about .scene-list {
  display: grid;
  gap: 1px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-mist-line);
}

.page-about .scene-list li {
  padding: 16px;
  background: var(--moss);
}

.page-about .scene__num {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .scene-list p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(243, 239, 228, .72);
}

/* 合作生态 */
.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding: 0;
  list-style: none;
}

/* 下一步 */
.page-about .sec--next {
  margin-top: clamp(24px, 3vw, 36px);
  padding: clamp(22px, 3.4vw, 38px);
  background: var(--char);
  border-left: 3px solid var(--orange);
  color: var(--cream);
}

.page-about .sec--next h2 {
  color: var(--cream);
}

.page-about .sec--next p {
  color: rgba(243, 239, 228, .76);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .next-contact {
  display: grid;
  gap: 1px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  background: rgba(201, 210, 204, .16);
}

.page-about .next-contact > div {
  padding: 13px 14px;
  background: var(--moss);
}

.page-about .next-contact dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .next-contact dd {
  margin: 5px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-about .next-note {
  margin-top: 14px;
  font-size: 12.5px;
  color: rgba(243, 239, 228, .6);
}

/* 右侧索引 */
.page-about .about-rail {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .rail-card {
  padding: 16px 16px 18px;
  background: var(--char);
  border: 1px solid rgba(201, 210, 204, .14);
}

.page-about .rail-card__head {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .rail-nav,
.page-about .rail-teams,
.page-about .rail-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rail-nav li,
.page-about .rail-teams li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(201, 210, 204, .1);
  font-size: 13.5px;
  color: rgba(243, 239, 228, .8);
}

.page-about .rail-nav li:last-child,
.page-about .rail-teams li:last-child {
  border-bottom: 0;
}

.page-about .rail-nav a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  color: inherit;
  text-decoration: none;
}

.page-about .rail-nav a span,
.page-about .rail-teams li span {
  font-size: 11px;
  color: var(--orange);
  letter-spacing: .1em;
}

.page-about .rail-nav a:hover {
  color: var(--cyan);
}

.page-about .rail-links li {
  padding: 7px 0;
}

.page-about .rail-links a {
  display: block;
  font-size: 13.5px;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 9px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .rail-links a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

@media (min-width: 600px) {
  .page-about .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .team-row__hint {
    flex: 0 1 auto;
    margin-left: auto;
    text-align: right;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 322px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
  }

  .page-about .scene-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-links a {
    transition: none;
  }
}
<<<END>>>