.page-about {
  background: var(--deep);
  color: var(--text);
  overflow-x: clip;
}

.page-about .container {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .section {
  padding-block: clamp(48px, 8vw, 96px);
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.16;
  font-size: clamp(26px, 4.2vw, 42px);
  color: var(--paper);
  margin: 12px 0 0;
}

.page-about .section--paper h2 {
  color: var(--ink);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(18px, 3.5vw, 30px) clamp(44px, 7vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -22%;
  right: -34%;
  width: min(780px, 115vw);
  height: 156%;
  background: linear-gradient(158deg, rgba(47, 227, 208, 0.17), rgba(6, 24, 38, 0) 64%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  margin-top: clamp(20px, 4vw, 40px);
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-size: clamp(34px, 6.4vw, 68px);
  color: var(--paper);
  margin: 14px 0 0;
  max-width: 14em;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 3vw, 24px) 0 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.78;
  color: var(--text);
  max-width: 32em;
}

.page-about .about-hero__actions {
  margin: clamp(22px, 4vw, 34px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__panel {
  background: linear-gradient(158deg, var(--night), var(--deep-2) 78%);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
  padding: clamp(20px, 3.6vw, 30px);
}

.page-about .about-hero__panel-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  background: var(--deep-2);
  padding: 14px 12px 16px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-fact__key {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-hero__panel-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 品牌故事 ---------- */
.page-about .about-story {
  background: var(--deep);
  border-top: 1px solid var(--line);
}

.page-about .about-story__grid {
  gap: clamp(26px, 5vw, 60px);
  align-items: start;
}

.page-about .about-story__body p {
  margin: 16px 0 0;
  line-height: 1.82;
  color: var(--text);
  max-width: 40em;
}

.page-about .about-story__body p:first-of-type {
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-about .about-story__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--night);
}

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

.page-about .media-frame__caption {
  padding: 10px 4px 0;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience__head {
  max-width: 44em;
}

.page-about .about-audience__sub {
  margin: 14px 0 0;
  line-height: 1.8;
  color: #3d4e5a;
  font-size: 16px;
}

.page-about .about-audience__list {
  list-style: none;
  margin: clamp(26px, 5vw, 46px) 0 0;
  padding: 0;
}

.page-about .about-audience__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-block: clamp(20px, 3.4vw, 28px);
  border-top: 1px solid rgba(11, 17, 24, 0.14);
}

.page-about .about-audience__item:last-child {
  border-bottom: 1px solid rgba(11, 17, 24, 0.14);
}

.page-about .about-audience__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-deep);
  padding-top: 6px;
}

.page-about .about-audience__text h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(19px, 2.4vw, 24px);
  color: var(--ink);
}

.page-about .about-audience__text p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.82;
  color: #3d4e5a;
  max-width: 46em;
}

/* ---------- 归档结构 ---------- */
.page-about .about-archive {
  background: var(--deep-2);
}

.page-about .about-archive .grid {
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-archive__side {
  position: relative;
  padding-top: 6px;
}

.page-about .about-note {
  margin-top: 18px;
  border-left: 2px solid var(--line-strong);
  padding-left: 14px;
}

.page-about .about-note summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-soft);
  transition: color 0.2s var(--ease);
}

.page-about .about-note summary::-webkit-details-marker {
  display: none;
}

.page-about .about-note summary::before {
  content: "+";
  font-family: var(--font-mono);
  margin-right: 8px;
  color: var(--cyan);
}

.page-about .about-note[open] summary::before {
  content: "−";
}

.page-about .about-note summary:hover {
  color: var(--cyan);
}

.page-about .about-note p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-about .about-archive__lede {
  margin: 16px 0 0;
  line-height: 1.82;
  color: var(--text);
  max-width: 42em;
}

.page-about .about-layers {
  margin-top: clamp(24px, 4vw, 36px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-items: start;
}

.page-about .about-layer {
  background: var(--night);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-layer__step {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral);
}

.page-about .about-layer h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 23px;
  color: var(--paper);
}

.page-about .about-layer p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-archive__stats {
  list-style: none;
  margin: clamp(30px, 5vw, 46px) 0 0;
  padding: 0;
}

.page-about .about-archive__stats li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-archive__stats .stat {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
  text-align: right;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  gap: clamp(26px, 5vw, 56px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid rgba(11, 17, 24, 0.14);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--night);
}

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

.page-about .about-team__figure .media-frame__caption {
  padding: 10px 12px 12px;
  background: var(--paper);
  color: #55656f;
}

.page-about .about-team__body > p {
  margin: 16px 0 0;
  line-height: 1.82;
  color: #3d4e5a;
  max-width: 42em;
}

.page-about .about-team__groups {
  list-style: none;
  margin: clamp(22px, 4vw, 30px) 0 0;
  padding: 0;
}

.page-about .about-team__groups li {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr);
  gap: 14px;
  padding-block: 12px;
  border-top: 1px solid rgba(11, 17, 24, 0.14);
  font-size: 15px;
  line-height: 1.76;
  color: #3d4e5a;
}

.page-about .about-team__groups li:last-child {
  border-bottom: 1px solid rgba(11, 17, 24, 0.14);
}

.page-about .about-team__groups strong {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-team__tail {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3d4e5a;
  max-width: 42em;
}

/* ---------- 版本沿革 ---------- */
.page-about .about-timeline {
  background: var(--deep);
  border-top: 1px solid var(--line);
}

.page-about .about-timeline .grid {
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-timeline__nav {
  padding-top: 6px;
}

.page-about .year-nav {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .year-nav__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-left: 2px solid var(--line);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .year-nav__link:hover,
.page-about .year-nav__link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-strong);
  border-left-color: var(--coral);
  background: rgba(47, 227, 208, 0.08);
}

.page-about .about-timeline__lede {
  margin: 16px 0 0;
  line-height: 1.82;
  color: var(--text);
  max-width: 40em;
}

.page-about .about-timeline__figure {
  margin: clamp(22px, 4vw, 32px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--night);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 227, 208, 0.06));
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px) 32px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--deep);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--coral);
  border-color: var(--coral);
}

.page-about .timeline__item:target::before {
  background: var(--coral);
  border-color: var(--coral);
}

.page-about .timeline__stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--cyan);
  transition: color 0.2s var(--ease);
}

.page-about .timeline__item:hover .timeline__year,
.page-about .timeline__item:target .timeline__year {
  color: var(--coral);
}

.page-about .timeline__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--warmgray);
  border: 1px solid rgba(199, 192, 180, 0.36);
  border-radius: 999px;
  padding: 2px 9px;
}

.page-about .timeline__body h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .timeline__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 44em;
}

.page-about .about-timeline__more {
  margin: clamp(24px, 4vw, 32px) 0 0;
}

/* ---------- 协作与反馈 ---------- */
.page-about .about-collab {
  background: var(--deep-2);
  border-top: 1px solid var(--line);
}

.page-about .about-collab__inner {
  gap: clamp(26px, 5vw, 56px);
  align-items: start;
}

.page-about .about-collab__body p {
  margin: 16px 0 0;
  line-height: 1.82;
  color: var(--text);
  max-width: 40em;
}

.page-about .about-collab__aside {
  border-top: 2px solid var(--coral);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-about .about-collab__aside-text {
  margin: 0 0 4px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-audience__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 28px;
  }

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

  .page-about .about-layer:nth-child(2) {
    margin-top: 24px;
  }

  .page-about .about-archive__stats li {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline__nav {
    position: sticky;
    top: 96px;
  }

  .page-about .year-nav {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-timeline__figure {
    margin-top: clamp(26px, 3vw, 36px);
  }

  .page-about .timeline__item {
    padding-left: 44px;
  }

  .page-about .timeline__item::before {
    left: 2px;
  }

  .page-about .timeline::before {
    left: 9px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team__figure {
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .year-nav__link,
  .page-about .timeline__year,
  .page-about .timeline__item::before,
  .page-about .about-note summary {
    transition: none;
  }
}
<<<END>>>