.page-about{
  --about-line: rgba(232,178,90,.24);
  --about-card: rgba(14,35,64,.74);
  --about-frame: rgba(232,178,90,.32);
  background: var(--night);
  color: var(--flag-white);
  overflow-x: clip;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about h1,
.page-about h2,
.page-about h3{
  font-family: var(--font-head);
  letter-spacing: -0.025em;
  line-height: 1.18;
  margin: 0;
}

.page-about p{ line-height: 1.78; }

.page-about .about-hero{ padding-block: clamp(24px, 4vw, 48px) 0; }

.page-about .about-hero__frame{
  position: relative;
  margin-top: clamp(18px, 2.6vw, 30px);
  padding: clamp(14px, 2.6vw, 34px);
  border: 1px solid var(--about-frame);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(232,178,90,.14), transparent 58%),
    linear-gradient(158deg, rgba(19,44,76,.92), rgba(7,20,38,.96));
  box-shadow: var(--shadow-panel);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-hero__bar{
  display: flex;
  align-items: center;
  gap: 7px;
  padding-bottom: clamp(12px, 1.8vw, 20px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__dot{
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted-3);
  flex: none;
}
.page-about .about-hero__dot:nth-child(1){ background: var(--red); }
.page-about .about-hero__dot:nth-child(2){ background: var(--yellow); }
.page-about .about-hero__dot:nth-child(3){ background: var(--green); }

.page-about .about-hero__url{
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  color: var(--muted-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 62%;
}

.page-about .about-hero__grid{
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 38px);
}

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

.page-about .about-hero h1{
  margin-top: 14px;
  font-size: clamp(29px, 5.6vw, 58px);
  font-weight: 800;
  color: var(--flag-white);
  text-wrap: balance;
}

.page-about .about-hero__lead{
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 48ch;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 17px);
}

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__media{
  position: relative;
  margin: 0;
  background: linear-gradient(160deg, var(--plateau-hi), var(--night));
  border: 1px solid var(--line);
}

.page-about .about-hero__media img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .media__caption{
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--butter);
  background: rgba(7,20,38,.84);
}

.page-about .about-ridge{
  display: block;
  width: 100%;
  height: clamp(44px, 7vw, 84px);
  margin-top: clamp(14px, 2.4vw, 26px);
}

.page-about .about-section{ padding-block: clamp(42px, 6vw, 90px); }

.page-about .section-head h2{
  margin-top: 10px;
  font-size: clamp(23px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--flag-white);
}

.page-about .about-section__note{
  margin: 12px 0 0;
  max-width: 38ch;
  color: var(--muted-2);
  font-size: 14px;
}

@media (min-width: 900px){
  .page-about .section-head--split{
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 48px;
  }
  .page-about .section-head--split .about-section__note{
    margin: 0;
    text-align: right;
    max-width: 34ch;
  }
}

/* 起点 */
.page-about .about-origin__grid{
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(24px, 3.4vw, 44px);
}

.page-about .about-origin__text{
  padding: clamp(20px, 3vw, 38px);
  background: var(--about-card);
}

.page-about .about-origin__text p{
  margin: 0 0 1em;
  color: var(--muted);
  font-size: 15.5px;
}
.page-about .about-origin__text p:last-child{ margin-bottom: 0; }

.page-about .about-origin__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-origin__list li{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px 14px 0;
  border-left: 2px solid var(--about-line);
  padding-left: 16px;
}

.page-about .about-origin__idx{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .about-origin__list p{
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

@media (min-width: 900px){
  .page-about .about-origin__grid{ grid-template-columns: 1.3fr .7fr; }
}

/* 时间线 */
.page-about .about-timeline{
  list-style: none;
  margin: clamp(26px, 4vw, 48px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before{
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 19px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(232,178,90,.5) 0 10px,
    rgba(232,178,90,.14) 10px 20px
  );
}

.page-about .about-timeline__item{
  position: relative;
  padding-left: 58px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-about .about-timeline__item:last-child{ margin-bottom: 0; }

.page-about .about-timeline__item:focus-visible{
  outline: 2px solid var(--yellow);
  outline-offset: 6px;
  border-radius: 4px;
}

.page-about .about-timeline__marker{
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--night);
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-about .about-timeline__body{
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--about-card);
  border: 1px solid var(--line-soft);
}

.page-about .about-timeline__tag{
  display: inline-block;
  margin: 0 0 12px;
  font-size: 11px;
}

.page-about .about-timeline__body h3{
  font-size: clamp(17px, 2vw, 21px);
  color: var(--flag-white);
}

.page-about .about-timeline__body p{
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14.5px;
}

@media (min-width: 900px){
  .page-about .about-timeline::before{ left: 50%; transform: translateX(-1px); }
  .page-about .about-timeline__item{
    width: calc(50% - 52px);
    padding-left: 0;
    margin-bottom: clamp(28px, 3.6vw, 48px);
  }
  .page-about .about-timeline__item:nth-child(odd){ margin-right: auto; }
  .page-about .about-timeline__item:nth-child(even){ margin-left: auto; }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__marker{ left: auto; right: -72px; }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__marker{ left: -72px; }
}

/* 团队 */
.page-about .about-team__panel{
  padding: clamp(20px, 3.2vw, 44px);
  background:
    linear-gradient(140deg, rgba(19,44,76,.94), rgba(7,20,38,.98) 70%);
  border: 1px solid var(--line);
}

.page-about .about-team__grid{
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
}

.page-about .about-team__copy h2{
  margin-top: 10px;
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 800;
}

.page-about .about-team__copy > p{
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 52ch;
}

.page-about .about-team__steps{
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__steps li{
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  color: var(--flag-white);
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-team__steps span{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-team__stats{
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-team__stat{
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 96px;
}

.page-about .about-team__num{
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  color: var(--butter);
}

.page-about .about-team__cap{
  font-size: 12.5px;
  color: var(--muted-2);
  line-height: 1.5;
}

.page-about .about-team__media{
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--plateau-hi), var(--night));
}

.page-about .about-team__media img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 900px){
  .page-about .about-team__grid{ grid-template-columns: 1.15fr .85fr; }
}

/* 索引 */
.page-about .about-ribbon{
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-ribbon__item{
  flex: 1 1 190px;
  padding: 18px 18px 20px;
  border-top: 2px solid var(--about-line);
  background: rgba(14,35,64,.5);
}

.page-about .about-ribbon__item:nth-child(1){ border-top-color: var(--cyan); }
.page-about .about-ribbon__item:nth-child(2){ border-top-color: var(--flag-white); }
.page-about .about-ribbon__item:nth-child(3){ border-top-color: var(--red); flex-grow: 1.28; }
.page-about .about-ribbon__item:nth-child(4){ border-top-color: var(--green); }
.page-about .about-ribbon__item:nth-child(5){ border-top-color: var(--yellow); flex-grow: .82; }

.page-about .about-ribbon__item p{
  margin: 12px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}

.page-about .about-index__note{
  margin-top: clamp(22px, 3vw, 36px);
  padding: clamp(20px, 3vw, 36px);
  background: linear-gradient(120deg, rgba(42,166,161,.16), rgba(14,35,64,.7) 65%);
  border: 1px solid rgba(42,166,161,.32);
  max-width: 760px;
}

.page-about .about-index__note h3{
  font-size: clamp(17px, 2vw, 22px);
  color: var(--flag-white);
}

.page-about .about-index__note p{
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14.5px;
}

/* 版本 */
.page-about .about-version__wrap{ display: grid; gap: clamp(24px, 3.4vw, 40px); }

.page-about .about-version__panel{
  padding: clamp(20px, 3vw, 38px);
  background: var(--about-card);
  border: 1px solid var(--line);
  max-width: 860px;
}

.page-about .about-version__head{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-version__badge{
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--night);
  background: var(--gold);
  padding: 5px 12px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.page-about .about-version__count{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted-2);
}

.page-about .about-version__panel > p{
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.page-about .about-meter{
  position: relative;
  height: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
  background: rgba(244,239,228,.1);
  overflow: hidden;
}

.page-about .about-meter__fill{
  display: block;
  height: 100%;
  width: 34%;
  background: linear-gradient(90deg, var(--gold), var(--butter));
}

.page-about .about-meter__cap{
  margin: 9px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--butter);
}

.page-about .about-version__list{
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 clamp(20px, 3vw, 28px);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-version__list li{
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-version__list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-version__media{
  position: relative;
  margin: 0;
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, var(--plateau-hi), var(--night));
}

.page-about .about-version__media img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

@media (min-width: 900px){
  .page-about .about-version__wrap{
    grid-template-columns: 1.1fr .9fr;
    align-items: center;
  }
  .page-about .about-version__wrap .section-head{ grid-column: 1 / -1; }
}

/* 覆盖与联系 */
.page-about .about-reach__grid{
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(24px, 3.4vw, 44px);
}

.page-about .about-reach__stats{
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-reach__stat{
  padding: 18px 20px;
  border-left: 3px solid var(--gold);
  background: linear-gradient(100deg, rgba(232,178,90,.12), transparent 72%);
}

.page-about .about-reach__num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  color: var(--butter);
}

.page-about .about-reach__cap{
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted-2);
}

.page-about .about-reach__contact{
  padding: clamp(20px, 3vw, 36px);
  background: var(--about-card);
  border: 1px solid var(--line);
}

.page-about .about-reach__contact h3{
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--flag-white);
}

.page-about .about-reach__rows{
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.page-about .about-reach__rows div{
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-reach__rows dt{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted-2);
}

.page-about .about-reach__rows dd{
  margin: 0;
  font-size: 14.5px;
  color: var(--flag-white);
  word-break: break-word;
}

.page-about .about-reach__hint{
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}

.page-about .about-reach__contact .btn{ margin-top: 18px; }

@media (min-width: 860px){
  .page-about .about-reach__grid{ grid-template-columns: .85fr 1.15fr; }
  .page-about .about-reach__stats{ grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
  }
}
<<<PAGE_CSS_END>>>