.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .about-block {
  padding: clamp(40px, 7vw, 96px) 0;
}

.page-about .about-block--mist {
  background: linear-gradient(180deg, var(--paper) 0%, var(--mist) 14%, var(--mist) 86%, var(--paper) 100%);
}

.page-about .about-block--deep {
  background: var(--deep);
  color: var(--on-deep);
}

.page-about .about-block--deep .eyebrow,
.page-about .about-block--deep h2 {
  color: var(--on-deep);
}

.page-about .about-block--deep p {
  color: var(--on-deep-soft);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 32px) 0 clamp(24px, 4vw, 44px);
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background:
    radial-gradient(130% 100% at 8% 0%, var(--mist) 0%, rgba(220, 234, 242, 0) 62%),
    var(--paper);
  padding: clamp(20px, 4vw, 52px);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 12px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 16px);
  opacity: .7;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: auto auto 0 0;
  width: 96px;
  height: 96px;
  border-left: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  border-radius: 0 0 0 var(--r-lg);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  grid-template-columns: 1fr;
  align-items: center;
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(30px, 6vw, 60px);
  line-height: 1.14;
  margin: 12px 0 16px;
  color: var(--deep);
}

.page-about .about-hero .lede {
  font-size: clamp(15px, 2.4vw, 18px);
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 46ch;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
  list-style: none;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 12px;
  color: var(--ink-mute);
}

.page-about .about-hero__fact .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--brick);
  letter-spacing: -.01em;
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 950;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid rgba(14, 59, 67, .18);
}

.page-about .about-hero__media figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-mute);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  padding: 4px 0 clamp(8px, 2vw, 18px);
}

.page-about .about-jump__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  padding: 6px 0 10px;
  margin: 0;
  scrollbar-width: none;
}

.page-about .about-jump__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump__link {
  display: inline-block;
  flex: 0 0 auto;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--deep);
  text-decoration: none;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--paper);
  outline: none;
}

/* ---------- 通用标题 ---------- */
.page-about .about-block h2 {
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: -.015em;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.24;
  margin: 10px 0 14px;
  color: var(--deep);
}

.page-about .about-block h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--deep);
}

.page-about .about-block p {
  line-height: 1.78;
  color: var(--ink-soft);
  margin: 0 0 14px;
  max-width: 62ch;
}

.page-about .about-block .lede {
  font-size: clamp(15px, 2.2vw, 17px);
  color: var(--ink-soft);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  grid-template-columns: 1fr;
}

.page-about .about-years {
  border-left: 2px solid var(--line-strong);
  padding-left: 16px;
}

.page-about .about-years__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 12px;
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-years__item {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.page-about .about-years__item .mono {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: -.01em;
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 20px 22px;
  background: var(--paper-orange);
  border-left: 4px solid var(--brick);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.page-about .about-quote p {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(16px, 2.6vw, 20px);
  line-height: 1.6;
  color: var(--deep);
}

.page-about .about-quote cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--brick);
}

/* ---------- 信息组织 ---------- */
.page-about .about-organize__head {
  max-width: 60ch;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .about-path {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-path__step {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px 20px 16px;
  box-shadow: var(--shadow-1);
}

.page-about .about-path__step::after {
  content: "";
  position: absolute;
  top: 20px;
  right: 18px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px dashed var(--line-strong);
}

.page-about .about-path__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--orange-deep);
}

.page-about .about-path__step h3 {
  margin-top: 6px;
}

.page-about .about-path__step p {
  margin: 0;
  font-size: 14px;
}

.page-about .about-organize__split {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .about-figures {
  list-style: none;
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--line-strong);
  display: grid;
  gap: 10px;
}

.page-about .about-figures li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .about-figures .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--teal);
  min-width: 42px;
}

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

.page-about .about-organize__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid rgba(14, 59, 67, .16);
}

.page-about .about-organize__media figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-mute);
}

/* ---------- 版本演进 ---------- */
.page-about .about-ver__head {
  max-width: 58ch;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-track {
  display: flex;
  gap: 16px;
  list-style: none;
  margin: 0 0 clamp(26px, 4vw, 44px);
  padding: 20px 4px 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-track__item {
  flex: 0 0 258px;
  scroll-snap-align: start;
  position: relative;
  padding-top: 18px;
  border-top: 2px solid var(--line-strong);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--paper);
}

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

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

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

.page-about .about-track__year {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--deep);
  display: block;
  margin-bottom: 6px;
}

.page-about .about-track__item p {
  font-size: 14px;
  margin: 0;
}

.page-about .about-versus {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .about-versus__col {
  border-radius: var(--r-lg);
  padding: 24px 22px;
  border: 1px solid transparent;
}

.page-about .about-versus__col--classic {
  background: var(--paper-2);
  border-color: var(--line-strong);
}

.page-about .about-versus__col--new {
  background: var(--deep);
  color: var(--on-deep);
}

.page-about .about-versus__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  margin: 0 0 10px;
  color: var(--brick);
}

.page-about .about-versus__col--new .about-versus__tag {
  color: var(--orange);
}

.page-about .about-versus__col h3 {
  font-size: clamp(16px, 2.4vw, 19px);
}

.page-about .about-versus__col--new h3 {
  color: var(--paper);
}

.page-about .about-versus__col ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-versus__col li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.page-about .about-versus__col--new li {
  color: var(--on-deep-soft);
}

.page-about .about-versus__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-versus__col--classic li::before {
  background: var(--teal);
}

.page-about .about-more {
  margin-top: 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: var(--glass-cool);
  padding: 4px 18px;
}

.page-about .about-more summary {
  cursor: pointer;
  padding: 12px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--deep);
}

.page-about .about-more summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .about-more__body {
  padding: 6px 0 16px;
  border-top: 1px dashed var(--line-strong);
}

.page-about .about-more__body p {
  font-size: 14px;
  margin: 10px 0 0;
}

.page-about .about-more__body .mono {
  display: inline-block;
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--brick);
}

.page-about .about-more__body a {
  color: var(--deep);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  grid-template-columns: 1fr;
  align-items: center;
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid rgba(250, 244, 232, .22);
}

.page-about .about-team__media figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--on-deep-soft);
}

.page-about .about-team__bars {
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 22px;
  border-top: 1px solid rgba(250, 244, 232, .18);
}

.page-about .about-team__bar {
  display: flex;
  height: 14px;
  border-radius: var(--r-pill);
  overflow: hidden;
  background: rgba(250, 244, 232, .12);
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
}

.page-about .about-team__fill--content {
  width: 46%;
  background: var(--orange);
}

.page-about .about-team__fill--product {
  width: 35%;
  background: var(--teal);
}

.page-about .about-team__fill--support {
  width: 19%;
  background: var(--brick);
}

.page-about .about-team__legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__legend li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-deep-soft);
}

.page-about .about-team__legend .mono {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--orange);
  min-width: 28px;
}

/* ---------- 原则 ---------- */
.page-about .about-principles__head {
  max-width: 56ch;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .about-principles__grid {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  grid-template-columns: 1fr;
  align-items: start;
}

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

.page-about .about-plan__item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-plan__item:first-child {
  border-top: 2px solid var(--deep);
  padding-top: 20px;
}

.page-about .about-plan__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--brick);
  padding-top: 2px;
}

.page-about .about-plan__item p {
  margin: 0;
  font-size: 14px;
}

.page-about .about-side-note {
  background: var(--mist);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: 24px 22px;
}

.page-about .about-side-note > .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--indigo);
  margin: 0 0 12px;
}

.page-about .about-side-note__lead {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(17px, 2.8vw, 21px);
  line-height: 1.6;
  color: var(--deep);
  margin: 0 0 12px;
}

.page-about .about-side-note p {
  font-size: 14px;
}

.page-about .about-side-note .btn {
  margin-top: 8px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background: var(--paper-orange);
  border-top: 1px solid var(--line);
  padding: clamp(32px, 5vw, 60px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
  grid-template-columns: 1fr;
  align-items: center;
}

.page-about .about-cta h2 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 30px);
  letter-spacing: -.01em;
  color: var(--deep);
  margin: 0 0 8px;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .about-origin__grid {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-years {
    position: sticky;
    top: 96px;
  }

  .page-about .about-organize__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 52px;
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: 56px;
  }

  .page-about .about-track__item {
    flex-basis: 288px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
</main>