.page-about{
  --p-line-gold: rgba(212,175,55,.32);
  --p-line-red: rgba(139,0,0,.55);
  background: var(--black-bg);
  color: var(--cream);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about [data-chapter]{
  scroll-margin-top: 72px;
}

/* ---------- 首屏 ---------- */
.p-about-hero{
  position: relative;
  min-height: 84vh;
  display: flex;
  align-items: center;
  padding: calc(var(--gutter) * 2) var(--gutter) 0;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(139,0,0,.22) 0%, rgba(10,10,10,.55) 44%, rgba(0,0,0,.9) 82%);
}

.p-about-hero__glows{
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.p-about-hero__glow{
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
}

.p-about-hero__glow--gold{
  width: 420px;
  height: 420px;
  right: -120px;
  top: 8%;
  background: rgba(212,175,55,.18);
}

.p-about-hero__glow--red{
  width: 340px;
  height: 340px;
  left: -110px;
  bottom: -70px;
  background: rgba(139,0,0,.24);
}

.p-about-hero__inner{
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(56px, 9vw, 108px) 0 clamp(40px, 6vw, 64px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.p-about-hero__eyebrow{
  display: inline-block;
  color: var(--gold-primary);
  letter-spacing: .18em;
  font-size: .8125rem;
  border-top: 1px solid var(--p-line-gold);
  border-bottom: 1px solid var(--p-line-gold);
  padding: 10px 0;
  margin-bottom: 26px;
}

.p-about-hero__title{
  font-family: var(--font-heading);
  font-size: var(--size-display);
  font-weight: 700;
  line-height: .98;
  letter-spacing: .01em;
  margin: 0;
  color: var(--cream);
  text-wrap: balance;
}

.p-about-hero__title span{
  display: block;
  margin-top: .45em;
  color: var(--gold-primary);
  font-size: .42em;
  font-weight: 400;
  letter-spacing: .22em;
}

.p-about-hero__lead{
  margin: 24px 0 0;
  max-width: 36em;
  font-size: 1.06rem;
  line-height: 1.9;
  color: var(--cream);
}

.p-about-hero__meta{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

.p-about-hero__meta span{
  border: 1px solid var(--p-line-gold);
  background: rgba(0,0,0,.36);
  color: var(--gold-light);
  font-size: .8125rem;
  letter-spacing: .06em;
  padding: 8px 16px;
  border-radius: var(--radius);
}

.p-about-hero__rail{
  display: none;
}

.p-about-hero__baseline{
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--black-bg), var(--gold-primary) 42%, var(--blood-red) 68%, var(--black-bg));
  opacity: .55;
}

/* ---------- 面包屑 ---------- */
.p-about-breadcrumb{
  max-width: var(--container);
  margin: 26px auto 0;
  padding: 0 var(--gutter);
  display: flex;
  gap: 10px;
  font-size: .8125rem;
  color: var(--gray-dim);
}

.p-about-breadcrumb a{
  color: var(--gold-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.p-about-breadcrumb a:hover{
  border-color: var(--gold-primary);
}

/* ---------- 章节导航 ---------- */
.p-about-chapter-nav{
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px var(--gutter);
  background: rgba(10,10,10,.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--p-line-gold);
  overflow-x: auto;
  scrollbar-width: thin;
}

.p-about-chapter-nav__label{
  font-family: var(--font-heading);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--gold-deep);
  margin-right: 4px;
  white-space: nowrap;
}

.p-about-chapter-nav button{
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  border: 1px solid var(--p-line-gold);
  border-radius: var(--radius);
  color: var(--gray-dim);
  font-family: var(--font-body);
  font-size: .8125rem;
  padding: 8px 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s, background .2s, border-color .2s;
}

.p-about-chapter-nav button:hover,
.p-about-chapter-nav button.is-active{
  color: var(--gold-primary);
  border-color: var(--gold-primary);
  background: rgba(212,175,55,.09);
}

.p-about-chapter-nav__cta{
  margin-left: auto;
  color: var(--cream);
  font-size: .8125rem;
  text-decoration: none;
  border-bottom: 1px solid var(--gold-primary);
  white-space: nowrap;
}

/* ---------- 品牌起源 ---------- */
.p-about-origin{
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) var(--gutter);
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.p-about-origin h2,
.p-about-timeline-band__copy h2,
.p-about-philosophy__head h2,
.p-about-team h2,
.p-about-trust__head h2{
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--size-h2);
  line-height: 1.16;
  margin: 0 0 14px;
  color: var(--cream);
}

.p-about-origin__copy p{
  margin: 0 0 1em;
  color: var(--cream);
  line-height: 1.9;
  font-size: .975rem;
}

.p-about-origin__media{
  margin: 0;
  border: 1px solid var(--p-line-gold);
}

.p-about-origin__media img,
.p-about-timeline-band__media img,
.p-about-team__media img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.p-about-origin__media figcaption,
.p-about-team__media figcaption{
  font-size: .8125rem;
  color: var(--gray-dim);
  padding: 12px 14px;
  background: rgba(0,0,0,.54);
  border-top: 1px solid var(--p-line-gold);
}

/* ---------- 发展历程 ---------- */
.p-about-timeline-band{
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) var(--gutter);
}

.p-about-timeline-band::before{
  content: "";
  position: absolute;
  top: clamp(64px, 9vw, 112px);
  bottom: 80px;
  left: 22px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold-primary) 8%, var(--gold-deep) 82%, transparent);
  opacity: .5;
}

.p-about-timeline-band__head{
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-bottom: 44px;
}

.p-about-timeline-band__media{
  margin: 0;
  border: 1px solid var(--p-line-gold);
}

.p-about-timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.p-about-timeline__item{
  position: relative;
  padding-left: 64px;
}

.p-about-timeline__marker{
  position: absolute;
  left: 13px;
  top: 30px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--charcoal);
  border: 2px solid var(--gold-primary);
  box-shadow: 0 0 0 4px rgba(212,175,55,.12);
  z-index: 1;
}

.p-about-timeline__content{
  background: rgba(30,30,30,.55);
  border: 1px solid var(--p-line-gold);
  border-left: 2px solid var(--gold-primary);
  padding: 20px 22px;
  border-radius: 2px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.p-about-timeline__content h3{
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 1.26rem;
  color: var(--gold-primary);
  font-weight: 700;
}

.p-about-timeline__content p{
  margin: 0;
  color: var(--cream);
  line-height: 1.8;
  font-size: .925rem;
}

/* ---------- 服务理念 ---------- */
.p-about-philosophy{
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) var(--gutter);
}

.p-about-philosophy__head{
  max-width: 44em;
  margin-bottom: 40px;
}

.p-about-philosophy__head .lead{
  color: var(--gray-dim);
  font-size: 1rem;
  line-height: 1.8;
}

.p-about-philosophy__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.p-about-philosophy__card{
  position: relative;
  padding: 64px 22px 26px;
  background: linear-gradient(165deg, rgba(30,30,30,.82), rgba(0,0,0,.58));
  border: 1px solid var(--p-line-gold);
  border-top: 3px solid var(--gold-primary);
  border-radius: var(--radius);
  overflow: hidden;
}

.p-about-philosophy__card::after{
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,175,55,.16), transparent 62%);
  pointer-events: none;
}

.p-about-philosophy__index{
  font-family: var(--font-heading);
  font-size: 3.4rem;
  line-height: 1;
  color: rgba(212,175,55,.26);
  position: absolute;
  top: 20px;
  right: 20px;
  pointer-events: none;
}

.p-about-philosophy__card h3{
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: 1.36rem;
  color: var(--gold-light);
  font-weight: 700;
}

.p-about-philosophy__card p{
  margin: 0;
  color: var(--cream);
  line-height: 1.85;
  font-size: .925rem;
}

.p-about-philosophy__note{
  margin: 44px 0 0;
  border-left: 3px solid var(--gold-primary);
  padding: 14px 20px;
  background: rgba(139,0,0,.08);
  color: var(--cream);
  line-height: 1.8;
}

/* ---------- 团队与资质 ---------- */
.p-about-team{
  background:
    radial-gradient(circle at 80% 0%, rgba(139,0,0,.22), transparent 46%),
    linear-gradient(135deg, rgba(0,0,0,.9), rgba(30,30,30,.82)),
    var(--void-black);
  border-top: 1px solid var(--p-line-gold);
  border-bottom: 1px solid var(--p-line-gold);
  padding: clamp(64px, 9vw, 112px) var(--gutter);
}

.p-about-team__inner{
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.p-about-team__copy .lead{
  color: var(--gray-dim);
}

.p-about-team__facts{
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.p-about-team__fact{
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  background: rgba(10,10,10,.42);
  border: 1px solid var(--p-line-gold);
}

.p-about-team__fact p{
  margin: 0;
  font-size: .9125rem;
  line-height: 1.7;
}

.p-about-team__badge{
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold-primary);
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .875rem;
  color: var(--gold-light);
  background: rgba(212,175,55,.08);
  letter-spacing: .04em;
}

.p-about-team__media{
  margin: 0;
  border: 1px solid var(--p-line-gold);
}

/* ---------- 荣誉与信任 ---------- */
.p-about-trust{
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) var(--gutter);
}

.p-about-trust__head{
  max-width: 46em;
  margin-bottom: 36px;
}

.p-about-trust__head::after{
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-primary), var(--blood-red));
  margin-top: 16px;
}

.p-about-trust__head .lead{
  color: var(--gray-dim);
}

.p-about-trust__grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}

.p-about-trust__grid figure{
  margin: 0;
  padding: 26px 22px;
  background: linear-gradient(160deg, rgba(139,0,0,.1), rgba(30,30,30,.66));
  border: 1px solid var(--p-line-gold);
  border-top: 3px solid var(--blood-red);
}

.p-about-trust__num{
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--gold-primary);
}

.p-about-trust__grid figcaption{
  margin-top: 10px;
  color: var(--gray-dim);
  font-size: .875rem;
  line-height: 1.55;
}

.p-about-trust__story{
  display: grid;
  gap: 14px;
  border-left: 2px solid var(--teal-gold);
  padding-left: 20px;
  margin-bottom: 36px;
}

.p-about-trust__story p{
  margin: 0;
  color: var(--cream);
  line-height: 1.85;
  font-size: .9375rem;
  max-width: 52em;
}

.p-about-trust__cta{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 900px){
  .p-about-hero__inner{
    grid-template-columns: 1fr 96px;
    gap: 40px;
  }

  .p-about-hero__rail{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    height: 240px;
    align-self: center;
    justify-self: center;
    writing-mode: vertical-rl;
    font-family: var(--font-heading);
    font-size: .75rem;
    letter-spacing: .22em;
    color: var(--gold-deep);
    border-left: 1px solid var(--p-line-gold);
    padding-left: 12px;
  }

  .p-about-origin{
    grid-template-columns: 1.04fr .86fr;
    gap: 56px;
  }

  .p-about-timeline-band__head{
    grid-template-columns: 1fr .85fr;
    align-items: center;
    gap: 56px;
  }

  .p-about-timeline-band::before{
    left: 50%;
    transform: translateX(-50%);
  }

  .p-about-timeline{
    gap: 26px;
  }

  .p-about-timeline__item{
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding-left: 0;
  }

  .p-about-timeline__content{
    grid-column: 1;
    margin-right: 56px;
  }

  .p-about-timeline__item:nth-child(even) .p-about-timeline__content{
    grid-column: 2;
    margin-right: 0;
    margin-left: 56px;
  }

  .p-about-timeline__marker{
    left: 50%;
    top: 30px;
    transform: translateX(-50%);
  }

  .p-about-philosophy__grid{
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: start;
  }

  .p-about-philosophy__card:nth-child(2){
    transform: translateY(30px);
  }

  .p-about-team__inner{
    grid-template-columns: 1fr .86fr;
    gap: 56px;
  }
}

@media (min-width: 760px){
  .p-about-trust__grid{
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
}

@media (max-width: 560px){
  .p-about-hero__meta{
    flex-direction: column;
    align-items: flex-start;
  }

  .p-about-hero__meta span{
    width: auto;
  }

  .p-about-trust__grid{
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .p-about-trust__num{
    font-size: 2rem;
  }
}