/* ============ 品牌坐标页 ============ */
.page-about{
  --about-line: rgba(63, 224, 208, .22);
  --about-line-soft: rgba(124, 143, 168, .24);
  --about-text: #A9B8CB;
  --about-text-strong: #C9D5E4;
  display: block;
  padding-bottom: clamp(48px, 7vw, 110px);
}

/* 面包屑 */
.page-about .breadcrumb{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}
.page-about .breadcrumb a{
  color: var(--cyan);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible{
  text-decoration: underline;
}

/* 通用区块节奏 */
.page-about .section{
  padding-block: clamp(44px, 5.6vw, 88px);
}
.page-about .about-h2{
  margin: 10px 0 0;
  max-width: 22ch;
  font-size: clamp(27px, 3.6vw, 46px);
  font-weight: 200;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--cream);
}
.page-about .about-h2--dark{
  color: var(--brown);
}
.page-about .about-sub{
  max-width: 56ch;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-text);
}

/* ===== 首屏 ===== */
.page-about .about-hero{
  position: relative;
  padding: clamp(30px, 4.4vw, 56px) 0 clamp(52px, 7vw, 100px);
}
.page-about .about-hero__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}
.page-about .about-hero__title{
  margin: 14px 0 0;
  max-width: 17ch;
  font-size: clamp(36px, 5.4vw, 70px);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--cream);
}
.page-about .about-hero__lede{
  max-width: 46ch;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-text-strong);
}

/* 坐标读头 */
.page-about .about-head{
  position: relative;
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--cream);
  color: var(--brown);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}
.page-about .about-head::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(12deg, rgba(28, 21, 18, .05) 0 1px, transparent 1px 9px);
  pointer-events: none;
}
.page-about .about-head > *{
  position: relative;
  z-index: 1;
}
.page-about .about-head__label{
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #8A6A4E;
}
.page-about .about-head__list{
  margin: 0;
}
.page-about .about-head__row{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(28, 21, 18, .28);
}
.page-about .about-head__row:last-child{
  border-bottom: 0;
}
.page-about .about-head__row dt{
  font-size: 13px;
  color: #6E5D4D;
}
.page-about .about-head__row dd{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--brown);
}
.page-about .about-head .note{
  margin: 12px 0 0;
  color: #7A6A5B;
}

/* ===== 规模坐标卡 ===== */
.page-about .about-facts__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(28px, 3.6vw, 46px);
}
.page-about .about-fact{
  padding: clamp(20px, 2.2vw, 30px);
  background: var(--navy);
  border-top: 2px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.page-about .about-fact__num{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 5.4vw, 70px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}
.page-about .about-fact__num span{
  font-size: .5em;
  vertical-align: super;
  color: var(--cyan);
}
.page-about .about-fact__name{
  margin: 12px 0 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cyan);
}
.page-about .about-fact__desc{
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text);
}
.page-about .about-fact--lead{
  background: var(--cream);
  border-top-color: var(--orange);
}
.page-about .about-fact--lead .about-fact__num{
  color: var(--brown);
}
.page-about .about-fact--lead .about-fact__name{
  color: #B84A12;
}
.page-about .about-fact--lead .about-fact__desc{
  color: #5C4B3C;
}

/* 图片容器 */
.page-about .about-media--wide .media__frame{
  aspect-ratio: 4 / 3;
}
.page-about .media img{
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  height: auto;
}
.page-about .about-road__media{
  margin: clamp(28px, 3.6vw, 46px) 0 0;
}
.page-about .about-road__media .media__frame{
  aspect-ratio: 3 / 2;
}
.page-about .about-team__media{
  margin: clamp(28px, 3.6vw, 46px) 0 0;
}
.page-about .about-net__media{
  margin: 0;
}

/* ===== 发展历程 ===== */
.page-about .about-road__layout{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 44px);
  margin-top: clamp(32px, 4.4vw, 60px);
}
.page-about .about-years__label{
  margin: 0;
}
.page-about .about-years__list{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-years__list a{
  display: block;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--speed) var(--ease-out), border-color var(--speed) var(--ease-out);
}
.page-about .about-years__list a:hover,
.page-about .about-years__list a:focus-visible{
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-about .about-timeline{
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 6vw, 96px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-node{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.6vw, 22px);
  padding-top: 20px;
  border-top: 1px solid var(--about-line-soft);
  scroll-margin-top: 96px;
}
.page-about .about-node__year{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -.03em;
  color: rgba(63, 224, 208, .4);
  font-variant-numeric: tabular-nums;
  transition: color 420ms var(--ease-out);
}
.page-about .about-node.is-visible .about-node__year,
.page-about .about-node:target .about-node__year{
  color: var(--cyan);
}
.page-about .about-node:target{
  border-top-color: var(--cyan);
}
.page-about .about-node__body h3{
  margin: 0 0 10px;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--cream);
}
.page-about .about-node__body p{
  max-width: 52ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-text);
}
.page-about .about-node .flag-ok{
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green);
  border: 1px solid rgba(60, 224, 139, .45);
  padding: 4px 10px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}
.page-about [data-flash].is-flashing{
  animation: aboutFlash 600ms var(--ease-out) 1;
}
@keyframes aboutFlash{
  0%{
    box-shadow: 0 0 0 0 rgba(60, 224, 139, .5);
    background: rgba(60, 224, 139, .1);
  }
  100%{
    box-shadow: 0 0 0 26px rgba(60, 224, 139, 0);
    background: transparent;
  }
}

/* ===== 团队分工 ===== */
.page-about .about-team__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(24px, 3vw, 40px);
}
.page-about .about-team__cell{
  padding: clamp(20px, 2.2vw, 28px);
  background: var(--navy);
  border-left: 2px solid rgba(63, 224, 208, .38);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  outline: none;
  transition: transform var(--speed) var(--ease-out), background var(--speed) var(--ease-out);
}
.page-about .about-team__cell:hover,
.page-about .about-team__cell:focus-within,
.page-about .about-team__cell:focus{
  transform: translateY(-4px);
  background: #172B49;
}
.page-about .about-team__cell:focus-visible{
  box-shadow: inset 0 0 0 2px var(--cyan);
}
.page-about .about-team__count{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(36px, 4.4vw, 56px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}
.page-about .about-team__role{
  margin: 12px 0 0;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--cyan);
}
.page-about .about-team__duty{
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text);
  transition: max-height 320ms var(--ease-out), opacity 240ms var(--ease-out), margin 320ms var(--ease-out);
}
.page-about .about-team__cell:hover .about-team__duty,
.page-about .about-team__cell:focus .about-team__duty,
.page-about .about-team__cell:focus-within .about-team__duty{
  max-height: 200px;
  margin-top: 12px;
  opacity: 1;
}

/* ===== 协作网络 ===== */
.page-about .about-net__grid{
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: clamp(24px, 3.4vw, 52px);
  margin-top: clamp(28px, 3.6vw, 46px);
}
.page-about .about-net__num{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(48px, 6vw, 84px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}
.page-about .about-net__num span{
  margin-left: 8px;
  font-size: .26em;
  letter-spacing: .1em;
  color: var(--cyan);
  vertical-align: super;
}
.page-about .about-net__text{
  max-width: 52ch;
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-text);
}
.page-about .about-net__tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-net__tags li{
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan);
  border: 1px solid rgba(63, 224, 208, .4);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.page-about .about-net__facts{
  margin: 26px 0 0;
  border-top: 1px solid var(--about-line-soft);
}
.page-about .about-net__fact{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line-soft);
}
.page-about .about-net__fact dt{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--slate);
}
.page-about .about-net__fact dd{
  margin: 0;
  font-size: 14.5px;
  color: var(--about-text-strong);
}

/* ===== 运营信息 ===== */
.page-about .about-ops__panel{
  padding: clamp(24px, 3.2vw, 48px);
  background: var(--cream);
  color: var(--brown);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 0 100%);
}
.page-about .about-ops__intro{
  max-width: 56ch;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #5C4B3C;
}
.page-about .about-ops__list{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 clamp(24px, 3vw, 52px);
  margin: clamp(22px, 2.8vw, 34px) 0 0;
}
.page-about .about-ops__row{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(28, 21, 18, .26);
}
.page-about .about-ops__row dt{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: #7A6A5B;
}
.page-about .about-ops__row dd{
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--brown);
  word-break: break-word;
}
.page-about .about-ops__row .mono{
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
}

/* ===== 合作入口 ===== */
.page-about .about-start__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(28px, 3.6vw, 46px);
}
.page-about .about-start__card{
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 2.4vw, 30px);
  background: var(--navy);
  border-top: 2px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform var(--speed) var(--ease-out);
}
.page-about .about-start__card:hover{
  transform: translateY(-4px);
}
.page-about .about-start__card--primary{
  border-top-color: var(--orange);
  background: #16294A;
}
.page-about .about-start__title{
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 500;
  color: var(--cream);
}
.page-about .about-start__card p{
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text);
}
.page-about .about-start__card .btn{
  margin-top: auto;
  align-self: flex-start;
}
.page-about .about-start__more{
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 14.5px;
  color: var(--about-text);
}
.page-about .about-start__more a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, .45);
}
.page-about .about-start__more a:hover,
.page-about .about-start__more a:focus-visible{
  border-bottom-color: var(--cyan);
}

/* 回到顶部 */
.page-about .about-top-link{
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(14px, 2vw, 28px);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink);
  background: var(--cyan);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform var(--speed) var(--ease-out);
}
.page-about .about-top-link:hover,
.page-about .about-top-link:focus-visible{
  transform: translateY(-3px);
  outline: none;
}

/* 滚动显现（渐进增强） */
.page-about [data-reveal]{
  opacity: 1;
}
.js-ready .page-about [data-reveal]{
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms var(--ease-out), transform 520ms var(--ease-out);
}
.js-ready .page-about [data-reveal].is-visible{
  opacity: 1;
  transform: none;
}

/* ===== 响应式 ===== */
@media (min-width: 640px){
  .page-about .about-facts__grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-team__grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-ops__list{
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-start__grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-ops__row--wide{
    grid-column: 1 / -1;
  }
}

@media (min-width: 940px){
  .page-about .about-hero__grid{
    grid-template-columns: 7fr 4fr;
    align-items: end;
  }
  .page-about .about-net__grid{
    grid-template-columns: 5fr 6fr;
  }
  .page-about .about-start__grid{
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1000px){
  .page-about .about-road__layout{
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }
  .page-about .about-years{
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .about-years__list{
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }
  .page-about .about-years__list a{
    padding: 6px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .page-about .about-years__list a:hover,
  .page-about .about-years__list a:focus-visible{
    border-left-color: var(--cyan);
    border-bottom-color: transparent;
  }
  .page-about .about-node{
    grid-template-columns: minmax(150px, 250px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(20px, 3vw, 48px);
  }
}

@media (min-width: 1160px){
  .page-about .about-facts__grid{
    grid-template-columns: 1.5fr 1.1fr 1fr 1.1fr;
  }
  .page-about .about-team__grid{
    grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  }
}

@media (hover: none){
  .page-about .about-team__duty{
    max-height: 220px;
    margin-top: 12px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
  .js-ready .page-about [data-reveal]{
    opacity: 1;
    transform: none;
  }
}