.page-about {
  --ab-panel: #2A2A2A;
  --ab-body: rgba(217, 222, 227, .82);
  --ab-dim: rgba(217, 222, 227, .55);
  --ab-rule: rgba(59, 74, 87, .75);
  background: var(--c-graphite);
  color: var(--c-silver);
  font-family: var(--font-body);
  line-height: 1.75;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: 24px 0 0;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ab-dim);
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--ab-rule);
}
.page-about .breadcrumb__link {
  color: var(--c-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumb__link:hover {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
}
.page-about .breadcrumb__item [aria-current="page"] {
  color: var(--c-amber);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--ab-rule);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 122, 0, .16), rgba(255, 122, 0, 0) 58%),
    var(--c-graphite);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 74, 87, 1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 74, 87, 1) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .06;
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-amber);
  margin: 0 0 18px;
  padding-left: 22px;
  position: relative;
}
.page-about .about-hero .eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 2px;
  background: var(--c-amber);
  transform: translateY(-50%);
}
.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7.4vw, 72px);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: #FFFFFF;
  margin: 0 0 22px;
  max-width: 18em;
}
.page-about .about-hero__lede {
  font-family: var(--font-serif);
  font-size: clamp(15px, 3.6vw, 19px);
  line-height: 1.85;
  color: var(--ab-body);
  max-width: 34em;
  margin: 0;
}
.page-about .about-hero__metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 44px;
  padding-top: 30px;
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-metric {
  display: grid;
  gap: 6px;
  position: relative;
  padding-left: 18px;
}
.page-about .about-metric::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--c-amber);
}
.page-about .about-metric .metric__value {
  font-family: var(--font-mono);
  font-size: clamp(38px, 10vw, 64px);
  line-height: .95;
  font-weight: 700;
  color: var(--c-amber);
  letter-spacing: -.02em;
}
.page-about .about-metric__unit {
  font-size: .38em;
  letter-spacing: .02em;
  margin-left: 4px;
  color: var(--c-amber-hi);
}
.page-about .about-metric .metric__label {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 13px;
  color: #FFFFFF;
}
.page-about .about-metric .metric__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-dim);
  max-width: 22em;
}

/* ---------- 页内索引 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--topbar-h);
  z-index: 6;
  background: rgba(30, 30, 30, .94);
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .about-index__row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index__row::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__label {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-amber);
  padding-right: 16px;
  border-right: 1px solid var(--ab-rule);
}
.page-about .about-index__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ab-dim);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .about-index__link:hover {
  color: var(--c-silver);
}
.page-about .about-index__link[aria-current="true"] {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
}

/* ---------- 通用区块 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 60px 0;
  border-bottom: 1px solid rgba(59, 74, 87, .45);
}
.page-about .section__head {
  margin-bottom: 26px;
}
.page-about .section__head .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-amber);
  margin: 0 0 12px;
  padding-left: 20px;
  position: relative;
}
.page-about .section__head .eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--c-amber);
  transform: translateY(-50%);
}
.page-about .section__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 5.2vw, 38px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: #FFFFFF;
  margin: 0;
  max-width: 22em;
}
.page-about .about-lead {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ab-body);
  max-width: 34em;
  margin: 0;
}
.page-about .about-note {
  margin: 30px 0 0;
  font-size: 14px;
  color: var(--ab-dim);
}
.page-about .about-note a {
  color: var(--c-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 0, .4);
}
.page-about .about-note a:hover {
  border-bottom-color: var(--c-amber);
}

/* ---------- 团队分栏条形 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-bar {
  padding: 18px 0;
  border-top: 1px solid var(--ab-rule);
  transition: background-color .2s ease;
}
.page-about .about-bar:last-child {
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .about-bar:hover {
  background: rgba(255, 122, 0, .05);
}
.page-about .about-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.page-about .about-bar__name {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 14px;
  color: #FFFFFF;
}
.page-about .about-bar__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-amber);
}
.page-about .about-bar__track {
  position: relative;
  height: 8px;
  margin: 12px 0 10px;
  background: rgba(217, 222, 227, .07);
  border-left: 1px solid var(--ab-rule);
}
.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  min-width: 6px;
  background: linear-gradient(90deg, var(--c-amber), var(--c-amber-hi));
  transition: width .6s cubic-bezier(.2, .8, .3, 1);
}
.page-about .about-bar__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-body);
  max-width: 46em;
}

/* ---------- 双栏图文 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-about .about-split__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-body);
}
.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}
.page-about .about-figure {
  margin: 0;
  position: relative;
}
.page-about .about-figure::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--c-amber);
  border-right: 2px solid var(--c-amber);
  pointer-events: none;
}
.page-about .about-figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}
.page-about .about-figure .media-frame__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-amber);
}

/* ---------- 保修判定步骤 ---------- */
.page-about .about-sub {
  margin-top: 48px;
  padding-top: 30px;
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-sub__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 16px;
  color: #FFFFFF;
  margin: 0 0 20px;
}
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid rgba(59, 74, 87, .5);
}
.page-about .about-step:last-child {
  border-bottom: 1px solid rgba(59, 74, 87, .5);
}
.page-about .about-step__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-amber);
  line-height: 1.3;
}
.page-about .about-step strong {
  display: block;
  font-size: 15px;
  color: #FFFFFF;
  font-weight: 600;
  margin-bottom: 6px;
}
.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-body);
}

/* ---------- 供货四档 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
}
.page-about .about-flow__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 16px 0;
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-flow__item:last-child {
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .about-flow__name {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 14px;
  color: #FFFFFF;
  min-width: 96px;
}
.page-about .about-flow__time {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-amber);
  min-width: 150px;
}
.page-about .about-flow__desc {
  flex: 1 1 240px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-body);
}

/* ---------- 发展历程时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--c-amber), rgba(59, 74, 87, .5));
}
.page-about .about-tl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 22px 0 26px 28px;
  position: relative;
}
.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 34px;
  width: 11px;
  height: 11px;
  background: var(--c-graphite);
  border: 2px solid var(--c-amber);
  transition: background-color .2s ease;
}
.page-about .about-tl:hover::before {
  background: var(--c-amber);
}
.page-about .about-tl__year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 11vw, 72px);
  line-height: .88;
  letter-spacing: -.02em;
  color: rgba(217, 222, 227, .2);
  transition: color .25s ease;
}
.page-about .about-tl:hover .about-tl__year {
  color: var(--c-amber);
}
.page-about .about-tl__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .02em;
  color: #FFFFFF;
  margin: 0 0 8px;
}
.page-about .about-tl__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-body);
  max-width: 42em;
}

/* ---------- 资质认证 ---------- */
.page-about .about-certs {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}
.page-about .about-cert {
  background: var(--ab-panel);
  border-left: 3px solid var(--c-amber);
  padding: 24px 22px;
  display: grid;
  gap: 8px;
  align-content: start;
}
.page-about .about-cert__code {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--c-amber);
}
.page-about .about-cert__title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .03em;
  color: #FFFFFF;
  margin: 0;
}
.page-about .about-cert__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-body);
}

/* ---------- 服务覆盖数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin: 40px 0 0;
  padding: 0;
}
.page-about .about-stat {
  background: var(--ab-panel);
  padding: 22px 20px;
  display: grid;
  gap: 8px;
}
.page-about .about-stat dt {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 12px;
  color: var(--ab-dim);
}
.page-about .about-stat dd {
  margin: 0;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-amber);
}
.page-about .about-stat dd span {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--ab-body);
  margin-left: 8px;
  letter-spacing: 0;
}

/* ---------- 移动端摘要（米白区） ---------- */
.page-about .about-brief {
  background: var(--c-cream);
  color: var(--c-ink);
  padding: 60px 0 66px;
}
.page-about .about-brief .section__head .eyebrow {
  color: #B25200;
}
.page-about .about-brief .section__head .eyebrow::before {
  background: var(--c-amber);
}
.page-about .about-brief .section__title {
  color: var(--c-ink);
}
.page-about .about-brief__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-brief__list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid rgba(15, 15, 15, .16);
}
.page-about .about-brief__list li:last-child {
  border-bottom: 1px solid rgba(15, 15, 15, .16);
}
.page-about .about-brief__list strong {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 13px;
  color: #B25200;
}
.page-about .about-brief__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  max-width: 40em;
}
.page-about .about-brief__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
}
.page-about .about-brief__plain {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 15, 15, .35);
  padding-bottom: 2px;
}
.page-about .about-brief__plain:hover {
  color: #B25200;
  border-bottom-color: #B25200;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .page-about .about-bar__num {
    font-size: 30px;
  }
  .page-about .about-certs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-brief__list li {
    grid-template-columns: 130px 1fr;
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-sec {
    padding: 78px 0;
  }
  .page-about .about-hero {
    padding: 72px 0 84px;
  }
  .page-about .about-split {
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
  }
  .page-about .about-split--rev {
    grid-template-columns: .9fr 1.1fr;
  }
  .page-about .about-certs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-tl {
    grid-template-columns: 190px 1fr;
    gap: 36px;
    align-items: start;
    padding: 26px 0 30px 34px;
  }
  .page-about .about-tl::before {
    top: 44px;
  }
  .page-about .about-tl__year {
    font-size: 72px;
  }
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }
  .page-about .about-step {
    grid-template-columns: 1fr;
    gap: 10px;
    border-bottom: 1px solid rgba(59, 74, 87, .5);
  }
}

@media (min-width: 1100px) {
  .page-about .about-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }
  .page-about .about-bar:nth-last-child(2) {
    border-bottom: 1px solid var(--ab-rule);
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}