.page-about{
  --about-shadow: 8px 8px 0 rgba(42,31,26,.85);
  background: var(--c-ink-green);
  color: var(--c-cream);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb{
  padding-top: clamp(16px,3vw,26px);
  padding-bottom: 6px;
}

/* ---------- 首屏主题带 ---------- */
.page-about .about-hero{
  position: relative;
  padding: clamp(22px,4vw,50px) 0 0;
  background: linear-gradient(180deg,var(--c-ink-deep) 0%,var(--c-ink-green) 80%);
  border-bottom: 3px solid var(--c-brown);
  overflow: hidden;
}
.page-about .about-hero::before{
  content:"";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg,rgba(138,163,155,.15) 1px,transparent 1px),
    linear-gradient(0deg,rgba(138,163,155,.10) 1px,transparent 1px);
  background-size: 74px 74px,74px 74px;
  pointer-events: none;
}
.page-about .about-hero__grid{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(24px,4vw,48px);
  align-items: start;
}
.page-about .about-hero__title{
  font-family: var(--font-display);
  font-size: clamp(29px,5vw,54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: 16px 0 0;
  max-width: 20ch;
  color: var(--c-cream);
}
.page-about .about-hero__lede{
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15.5px,1.3vw,18px);
  line-height: 1.82;
  color: rgba(244,234,216,.84);
}

.page-about .about-facts{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 2px;
  background: rgba(42,31,26,.9);
  border: 2px solid var(--c-brown);
  box-shadow: var(--about-shadow);
}
.page-about .about-facts__item{
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: linear-gradient(160deg,#10231e,#0b1a16);
}
.page-about .about-facts__num{
  font-size: clamp(22px,2.4vw,30px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}
.page-about .about-facts__label{
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244,234,216,.72);
}

.page-about .about-hero__media{
  position: relative;
  margin: clamp(28px,4.6vw,56px) 0 0;
}
.page-about .about-hero__media .media__img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--c-brown);
  box-shadow: var(--about-shadow);
}
.page-about .about-media-tag{
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-charcoal);
  background: var(--c-orange);
  border: 2px solid var(--c-brown);
}

/* ---------- 目录带 ---------- */
.page-about .about-toc{
  background: var(--c-paper);
  color: var(--c-charcoal);
  border-bottom: 3px solid var(--c-brown);
}
.page-about .about-toc__inner{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.page-about .about-toc__label{
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-brown);
  padding-right: 16px;
  border-right: 2px solid rgba(42,31,26,.3);
}
.page-about .about-toc__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.page-about .about-toc__link{
  font-size: 14px;
  color: var(--c-charcoal);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: border-color .18s ease,color .18s ease;
}
.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible{
  color: var(--c-red,var(--c-orange));
  border-bottom-color: var(--c-orange);
}

/* ---------- 区块基础 ---------- */
.page-about .about-band{
  position: relative;
  padding: clamp(48px,7vw,104px) 0;
}
.page-about .about-band--paper{
  background: var(--c-paper);
  color: var(--c-charcoal);
  border-bottom: 3px solid var(--c-brown);
}
.page-about .about-band--charcoal{
  background: var(--c-charcoal);
  color: var(--c-cream);
  border-bottom: 3px solid var(--c-brown);
}
.page-about .about-band--green{
  background: linear-gradient(180deg,var(--c-ink-green),var(--c-ink-deep));
  border-bottom: 3px solid var(--c-brown);
}
.page-about .about-band--paper .eyebrow{
  color: var(--c-brown);
}
.page-about .about-h2{
  font-family: var(--font-display);
  font-size: clamp(23px,3.2vw,38px);
  line-height: 1.24;
  letter-spacing: -.015em;
  margin: 14px 0 0;
  max-width: 24ch;
}
.page-about .about-h2--light{
  color: var(--c-cream);
}
.page-about .about-lede{
  margin: 18px 0 0;
  max-width: 66ch;
  font-size: clamp(15px,1.15vw,17px);
  line-height: 1.85;
  color: rgba(42,31,26,.8);
}
.page-about .about-lede--light{
  color: rgba(244,234,216,.82);
}

/* ---------- 01 品牌起点 ---------- */
.page-about .about-origin{
  margin-top: clamp(30px,4.4vw,56px);
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(28px,4vw,54px);
}
.page-about .about-timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before{
  content:"";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg,var(--c-orange),rgba(91,240,208,.9) 62%,rgba(91,240,208,0));
}
.page-about .about-timeline__item{
  position: relative;
  padding: 0 0 24px 32px;
}
.page-about .about-timeline__item::before{
  content:"";
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-cream);
  border: 3px solid var(--c-brown);
}
.page-about .about-timeline__item--hot::before{
  background: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(255,122,26,.22);
}
.page-about .about-timeline__phase{
  display: block;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-orange);
  margin: 0;
}
.page-about .about-timeline__text{
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(42,31,26,.86);
}
.page-about .about-origin__body p{
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: clamp(15px,1.1vw,17px);
  line-height: 1.88;
  color: rgba(42,31,26,.86);
}
.page-about .about-origin__body p:last-child{
  margin-bottom: 0;
}

/* ---------- 02 服务对象 ---------- */
.page-about .about-aud{
  margin-top: clamp(30px,4.4vw,54px);
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(18px,2.6vw,26px);
}
.page-about .about-aud__card{
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px,3vw,30px);
  background: linear-gradient(165deg,#1c1c1c,#101010);
  border: 2px solid rgba(42,31,26,.95);
  border-top-width: 5px;
  box-shadow: var(--about-shadow);
}
.page-about .about-aud__card--cyan{ border-top-color: var(--c-cyan); }
.page-about .about-aud__card--orange{ border-top-color: var(--c-orange); }
.page-about .about-aud__card--red{ border-top-color: var(--c-red); }
.page-about .about-aud__num{
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-mist);
}
.page-about .about-aud__title{
  font-family: var(--font-display);
  font-size: clamp(18px,2vw,23px);
  line-height: 1.35;
  margin: 0;
  color: var(--c-cream);
}
.page-about .about-aud__text{
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244,234,216,.8);
}
.page-about .about-aud__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .about-aud__list li{
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244,234,216,.68);
}
.page-about .about-aud__list li::before{
  content:"";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--c-cyan);
}
.page-about .about-aud__card--orange .about-aud__list li::before{ background: var(--c-orange); }
.page-about .about-aud__card--red .about-aud__list li::before{ background: var(--c-red); }
.page-about .about-aud__link{
  margin-top: auto;
  align-self: flex-start;
  font-size: 14px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 2px solid rgba(91,240,208,.4);
  padding-bottom: 2px;
  transition: border-color .18s ease;
}
.page-about .about-aud__link:hover,
.page-about .about-aud__link:focus-visible{
  border-bottom-color: var(--c-cyan);
}

/* ---------- 03 更新节奏 ---------- */
.page-about .about-filter{
  margin-top: clamp(24px,3.4vw,38px);
  flex-wrap: wrap;
}
.page-about .about-rhythm{
  list-style: none;
  margin: clamp(18px,2.4vw,26px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: rgba(42,31,26,.7);
  border: 2px solid var(--c-brown);
}
.page-about .about-rhythm__row{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 6px 20px;
  padding: 18px 18px;
  background: rgba(8,25,21,.86);
  transition: background .18s ease;
}
.page-about .about-rhythm__row:hover{
  background: rgba(14,42,36,.95);
}
.page-about .about-rhythm__meta{
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-cyan);
}
.page-about .about-rhythm__title{
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.4;
  margin: 0;
  color: var(--c-cream);
}
.page-about .about-rhythm__text{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244,234,216,.74);
}
.page-about .about-rhythm__media{
  margin: clamp(26px,3.6vw,44px) 0 0;
}
.page-about .about-rhythm__media .media__img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--c-brown);
  box-shadow: var(--about-shadow);
}

/* ---------- 04 认证 ---------- */
.page-about .about-cert{
  margin-top: clamp(28px,4vw,50px);
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(26px,3.6vw,48px);
  align-items: start;
}
.page-about .about-quote{
  margin: 26px 0 0;
  padding: 18px 22px;
  border: 3px solid var(--c-brown);
  border-left-width: 8px;
  background: var(--c-cream);
  box-shadow: 5px 5px 0 rgba(42,31,26,.55);
}
.page-about .about-quote p{
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(16px,1.5vw,19px);
  line-height: 1.7;
  color: var(--c-brown);
}
.page-about .about-checklist{
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-checklist__item{
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(42,31,26,.88);
}
.page-about .about-checklist__item::before{
  content:"";
  position: absolute;
  left: 0;
  top: 5px;
  width: 14px;
  height: 14px;
  border: 2px solid var(--c-brown);
  background: var(--c-cyan);
}
.page-about .about-cert__media{
  margin: 0;
}
.page-about .about-cert__media .media__img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--c-brown);
  box-shadow: var(--about-shadow);
}

/* ---------- 05 团队 ---------- */
.page-about .about-stats{
  list-style: none;
  margin: clamp(26px,3.6vw,42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 2px;
  background: rgba(42,31,26,.85);
  border: 2px solid var(--c-brown);
}
.page-about .about-stats__item{
  padding: 20px 16px;
  background: rgba(8,25,21,.9);
}
.page-about .about-stats__item .stat__value{
  display: block;
  font-size: clamp(26px,3vw,38px);
  font-weight: 700;
  color: var(--c-orange);
  letter-spacing: -.02em;
}
.page-about .about-stats__item .stat__label{
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(244,234,216,.72);
}

.page-about .about-flow{
  list-style: none;
  margin: clamp(28px,4vw,48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 2px;
  background: rgba(42,31,26,.75);
  border: 2px solid var(--c-brown);
}
.page-about .about-flow__step{
  padding: 20px 18px;
  background: rgba(8,25,21,.88);
}
.page-about .about-flow__idx{
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}
.page-about .about-flow__title{
  font-family: var(--font-display);
  font-size: 17px;
  margin: 8px 0 0;
  color: var(--c-cream);
}
.page-about .about-flow__text{
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244,234,216,.74);
}

/* ---------- 行动区 ---------- */
.page-about .about-band--cta{
  background: var(--c-charcoal);
  border-bottom: none;
}
.page-about .about-cta{
  display: grid;
  gap: 16px;
  justify-items: start;
}
.page-about .about-cta__title{
  font-family: var(--font-display);
  font-size: clamp(23px,3.2vw,36px);
  line-height: 1.26;
  margin: 0;
  color: var(--c-cream);
  max-width: 22ch;
}
.page-about .about-cta__text{
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(244,234,216,.8);
}
.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width:760px){
  .page-about .about-facts{
    grid-template-columns: repeat(4,minmax(0,1fr));
  }
  .page-about .about-aud{
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
  .page-about .about-rhythm__row{
    grid-template-columns: 130px minmax(0,1fr);
    align-items: baseline;
  }
  .page-about .about-rhythm__meta{
    grid-row: span 2;
  }
  .page-about .about-flow{
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
  .page-about .about-stats{
    grid-template-columns: repeat(4,minmax(0,1fr));
  }
}

@media (min-width:1000px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0,1.4fr) minmax(0,.6fr);
    gap: clamp(32px,4.4vw,64px);
  }
  .page-about .about-facts{
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
  .page-about .about-origin{
    grid-template-columns: minmax(0,300px) minmax(0,1fr);
  }
  .page-about .about-aud{
    grid-template-columns: repeat(3,minmax(0,1fr));
  }
  .page-about .about-cert{
    grid-template-columns: minmax(0,1fr) minmax(0,380px);
  }
  .page-about .about-flow{
    grid-template-columns: repeat(4,minmax(0,1fr));
  }
}

@media (min-width:1200px){
  .page-about .about-hero__media{
    width: 100%;
  }
}