/* ============ page-about · 站点介绍 ============ */

.page-about{
  padding-bottom: clamp(72px, 12vw, 152px);
  overflow-x: clip;
}

.page-about .about-h2{
  margin: 0;
}

.page-about .about-prose p{
  margin: 0 0 1.1em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  font-weight: 300;
  color: rgba(245, 243, 239, .82);
}

.page-about .about-prose p:last-child{
  margin-bottom: 0;
}

.page-about .breadcrumbs{
  padding-top: clamp(20px, 4vw, 36px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero{
  padding-block: clamp(32px, 6vw, 80px) clamp(48px, 9vw, 108px);
}

.page-about .about-hero__grid{
  align-items: center;
}

.page-about .about-hero__text{
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.6vw, 24px);
}

.page-about .about-hero__title{
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(36px, 6.4vw, 80px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.025em;
  color: var(--cream);
}

.page-about .about-hero__spark{
  background: var(--rainbow);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lede{
  max-width: 58ch;
  margin: 0;
  color: var(--stone);
  font-weight: 300;
  line-height: 1.9;
}

.page-about .about-hero__facts{
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 44px);
}

.page-about .about-hero__facts li{
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact__num{
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: .04em;
  color: var(--white);
}

.page-about .about-fact__cap{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--stone);
}

.page-about .about-hero__visual{
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: clamp(12px, 3vw, 24px);
}

.page-about .about-palm{
  position: relative;
  width: min(70vw, 360px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.page-about .about-palm__ring,
.page-about .about-palm__halo,
.page-about .about-palm__core{
  position: absolute;
  border-radius: 50%;
}

.page-about .about-palm__ring{
  inset: 0;
  background: var(--rainbow-ring);
  -webkit-mask: radial-gradient(circle, transparent 0 60%, #000 61% 64%, transparent 65%);
  mask: radial-gradient(circle, transparent 0 60%, #000 61% 64%, transparent 65%);
  opacity: .9;
  animation: about-spin 32s linear infinite;
}

.page-about .about-palm__halo{
  inset: 16%;
  background: radial-gradient(circle, rgba(0, 122, 255, .3), rgba(175, 82, 222, .14) 46%, transparent 72%);
  filter: blur(14px);
}

.page-about .about-palm__core{
  width: 13%;
  aspect-ratio: 1;
  background: radial-gradient(circle at 35% 30%, var(--white), var(--r3) 42%, var(--r1) 78%, transparent 82%);
  box-shadow: 0 0 42px rgba(255, 149, 0, .5), 0 0 90px rgba(255, 59, 48, .26);
}

@keyframes about-spin{
  to{ transform: rotate(360deg); }
}

/* ---------- 章节锚点条 ---------- */

.page-about .about-anchors{
  border-block: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 22, 28, .7), rgba(8, 9, 12, 0));
}

.page-about .about-anchors__list{
  list-style: none;
  margin: 0;
  padding: 14px 0;
  display: flex;
  gap: clamp(16px, 3vw, 32px);
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-anchors__list li{
  flex: 0 0 auto;
}

.page-about .about-anchors__list a{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 2px;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--stone);
  border-bottom: 1px solid transparent;
  transition: color .3s ease, border-color .3s ease;
}

.page-about .about-anchors__list a:hover{
  color: var(--cream);
  border-color: var(--clay);
}

.page-about .about-anchors__num{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

/* ---------- 通用章节 ---------- */

.page-about .about-section{
  padding-block: clamp(56px, 9vw, 116px);
}

.page-about .about-section__head{
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.8vw, 18px);
  max-width: 62ch;
}

.page-about .about-section__lede{
  margin: 0;
  color: var(--stone);
  font-weight: 300;
  line-height: 1.85;
}

/* ---------- 01 品牌主张 ---------- */

.page-about .about-claim{
  align-items: start;
  row-gap: clamp(28px, 5vw, 48px);
}

.page-about .about-claim__body{
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-claim__media{
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(110% 120% at 50% 0%, rgba(0, 122, 255, .18), transparent 62%),
    var(--slate);
}

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

/* ---------- 02 内容体系 ---------- */

.page-about .about-diagram{
  margin: clamp(28px, 5vw, 52px) 0 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(120% 130% at 50% 0%, rgba(175, 82, 222, .16), transparent 64%),
    var(--slate);
}

.page-about .about-diagram img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-diagram figcaption,
.page-about .about-journey-media figcaption{
  padding: 12px clamp(16px, 3vw, 24px) 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-columns{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-col-card{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 24px);
  background: linear-gradient(180deg, rgba(27, 38, 52, .92), rgba(18, 22, 28, .96));
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform .35s cubic-bezier(.2, .7, .3, 1), border-color .35s ease, box-shadow .35s ease;
}

.page-about .about-col-card::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--rainbow);
  opacity: .5;
  transition: width .4s ease, opacity .4s ease;
}

.page-about .about-col-card:hover{
  transform: translateY(-4px);
  border-color: rgba(180, 103, 74, .55);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
}

.page-about .about-col-card:hover::before{
  width: 100%;
  opacity: 1;
}

.page-about .about-col-card__num{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .about-col-card__title{
  margin: 0;
  font-size: clamp(17px, 2vw, 19px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cream);
}

.page-about .about-col-card__text{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  font-weight: 300;
  color: rgba(245, 243, 239, .72);
}

.page-about .about-col-card__go{
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--stone);
  transition: color .3s ease;
}

.page-about .about-col-card:hover .about-col-card__go{
  color: var(--clay);
}

/* ---------- 03 发展历程 ---------- */

.page-about .about-journey-wrap{
  padding-top: clamp(24px, 4vw, 44px);
}

.page-about .about-journey-media{
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(120% 130% at 50% 100%, rgba(0, 122, 255, .16), transparent 62%),
    var(--slate);
}

.page-about .about-journey-media img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-timeline{
  --tl-year: 72px;
  --tl-gap: 40px;
  position: relative;
  margin: clamp(32px, 6vw, 60px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before{
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--tl-year) + var(--tl-gap) / 2);
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-strong) 10%, var(--line-strong) 90%, transparent);
}

.page-about .about-timeline .timeline__item{
  position: relative;
  display: grid;
  grid-template-columns: var(--tl-year) 1fr;
  column-gap: var(--tl-gap);
  padding-block: clamp(20px, 3.4vw, 32px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-timeline .timeline__item:first-child{
  border-top: 1px solid var(--line);
}

.page-about .about-timeline .timeline__item::before{
  content: "";
  position: absolute;
  top: calc(clamp(20px, 3.4vw, 32px) + 9px);
  left: calc(var(--tl-year) + var(--tl-gap) / 2 - 5px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--rainbow);
  box-shadow: 0 0 0 4px var(--void), 0 0 18px rgba(0, 122, 255, .5);
  opacity: .3;
  transform: scale(.72);
  transition: opacity .5s ease, transform .5s ease, box-shadow .5s ease;
}

.page-about .about-timeline .timeline__item.is-lit::before{
  opacity: 1;
  transform: scale(1);
  box-shadow: 0 0 0 4px var(--void), 0 0 24px rgba(255, 149, 0, .55);
}

.page-about .about-tl-year{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.9vw, 18px);
  letter-spacing: .06em;
  color: var(--cream);
}

.page-about .about-tl-body{
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-tl-title{
  margin: 0;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-tl-text{
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  font-weight: 300;
  color: rgba(245, 243, 239, .72);
}

.page-about .about-quote{
  margin: clamp(40px, 7vw, 76px) 0 0;
  padding: 0 0 0 clamp(18px, 3vw, 32px);
  border-left: 2px solid transparent;
  border-image: var(--rainbow) 1;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--cream);
}

/* ---------- 04 维护节奏 ---------- */

.page-about .about-team{
  align-items: start;
  row-gap: clamp(28px, 5vw, 44px);
}

.page-about .about-team__text{
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat{
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--slate);
}

.page-about .about-stat__num{
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-stat:first-child .about-stat__num{
  background: var(--rainbow);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-stat__cap{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--stone);
}

/* ---------- 05 版本归档 ---------- */

.page-about .about-tags{
  list-style: none;
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 06 长期使用 ---------- */

.page-about .about-keep > .container{
  align-items: start;
  row-gap: clamp(28px, 5vw, 44px);
}

.page-about .about-keep__text{
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-keep__card{
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(22px, 3vw, 30px);
}

.page-about .about-steps{
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-steps li{
  counter-increment: step;
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  font-weight: 300;
  color: rgba(245, 243, 239, .78);
}

.page-about .about-steps li::before{
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay);
  padding-top: 3px;
}

.page-about .about-keep__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-keep__note{
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13.5px;
  line-height: 1.8;
  font-weight: 300;
  color: var(--stone);
}

.page-about .about-keep__note a{
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid var(--clay);
  transition: color .3s ease;
}

.page-about .about-keep__note a:hover{
  color: var(--clay);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px){
  .page-about .about-columns{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px){
  .page-about .about-stats{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1040px){
  .page-about .about-columns{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 719px){
  .page-about .about-timeline{
    --tl-year: 52px;
    --tl-gap: 26px;
  }

  .page-about .about-timeline .timeline__item::before{
    left: calc(var(--tl-year) + var(--tl-gap) / 2 - 4px);
    width: 8px;
    height: 8px;
  }

  .page-about .about-hero__title{
    font-size: clamp(32px, 9vw, 44px);
  }

  .page-about .about-keep__actions .btn{
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-palm__ring{
    animation: none;
  }

  .page-about .about-col-card,
  .page-about .about-timeline .timeline__item::before{
    transition: none;
  }
}