.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(88px, 12vw, 148px);
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(48px, 7vw, 96px);
  position: relative;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 12% -10% auto auto;
  width: min(520px, 60vw);
  height: min(520px, 60vw);
  background: radial-gradient(circle at 50% 50%, rgba(226, 69, 50, 0.26), rgba(216, 169, 74, 0.08) 55%, transparent 72%);
  filter: blur(6px);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  grid-template-columns: 1fr;
  align-items: end;
}
.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-display-l);
  line-height: 1.02;
  letter-spacing: 0.01em;
  margin: 18px 0 22px;
  color: var(--paper);
  overflow-wrap: anywhere;
}
.page-about .about-hero__lede {
  max-width: 56ch;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.8;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__plate {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(155deg, rgba(226, 69, 50, 0.14), rgba(30, 26, 24, 0.9) 46%, rgba(18, 16, 15, 0.95));
  padding: clamp(20px, 3vw, 30px);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.35);
  min-width: 0;
}
.page-about .about-hero__plate-label {
  color: var(--gold);
  font-size: var(--fs-index);
  letter-spacing: 0.16em;
  margin-bottom: 18px;
}
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: 0;
}
.page-about .about-fact__label {
  font-size: 12px;
  color: var(--mist);
  margin-bottom: 6px;
}
.page-about .about-fact__num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-light);
  margin: 0;
}
.page-about .about-fact__num span {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--mist);
  margin-left: 4px;
}
.page-about .about-hero__plate-note {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--mist);
  letter-spacing: 0.04em;
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: var(--space-block) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-block--ink2 {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}
.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid rgba(18, 16, 15, 0.08);
}
.page-about .about-block__head {
  margin-bottom: clamp(24px, 3vw, 36px);
}
.page-about .about-head-note {
  font-size: 13px;
  color: var(--mist);
  max-width: 30ch;
  line-height: 1.7;
}
.page-about .about-text {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
  margin-top: 16px;
}
.page-about .about-block--paper .about-text--ink {
  color: rgba(18, 16, 15, 0.72);
}
.page-about .about-inline-link {
  display: inline-block;
  margin-top: 22px;
  color: var(--gold-light);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid rgba(216, 169, 74, 0.4);
  padding-bottom: 3px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

/* ---------- 定位与矩阵 ---------- */
.page-about .about-who {
  align-items: start;
}
.page-about .about-who__intro h2 {
  margin-top: 14px;
  color: var(--paper);
  line-height: 1.22;
}
.page-about .about-matrix {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  min-width: 0;
}
.page-about .about-matrix__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding: 16px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(226, 69, 50, 0.08), transparent 62%);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-matrix__item:hover,
.page-about .about-matrix__item:focus-within {
  background: linear-gradient(90deg, rgba(226, 69, 50, 0.2), rgba(216, 169, 74, 0.06));
  transform: translateX(2px);
}
.page-about .about-matrix__no {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.1em;
  padding-top: 3px;
}
.page-about .about-matrix__name {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 700;
  text-decoration: none;
}
.page-about .about-matrix__name:hover,
.page-about .about-matrix__name:focus-visible {
  color: var(--gold-light);
}
.page-about .about-matrix__desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
  overflow-wrap: anywhere;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  grid-template-columns: 1fr;
}
.page-about .about-timeline__rail {
  display: grid;
  gap: 0;
  position: relative;
  padding-left: 4px;
}
.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: 22px 1fr;
  grid-template-areas:
    "dot year"
    "dot name";
  gap: 2px 10px;
  align-items: center;
  text-align: left;
  background: none;
  border: 0;
  border-left: 1px solid var(--line);
  padding: 12px 10px 12px 16px;
  cursor: pointer;
  color: var(--mist);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-node:last-child {
  border-left-color: transparent;
}
.page-about .about-node__dot {
  grid-area: dot;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-2);
  border: 1px solid var(--gold);
  margin-left: -21px;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-node__year {
  grid-area: year;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.page-about .about-node__name {
  grid-area: name;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-node:hover,
.page-about .about-node:focus-visible {
  color: var(--paper);
  border-left-color: var(--gold);
}
.page-about .about-node[aria-selected="true"] {
  color: var(--paper);
  border-left-color: var(--red-hot);
}
.page-about .about-node[aria-selected="true"] .about-node__dot {
  background: var(--red-hot);
  box-shadow: 0 0 0 4px rgba(226, 69, 50, 0.22);
}
.page-about .about-node[aria-selected="true"] .about-node__name {
  color: var(--gold-light);
}

.page-about .about-timeline__panels {
  display: grid;
  gap: 14px;
  min-width: 0;
}
.page-about .about-plaque {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface-2);
  padding: clamp(18px, 2.4vw, 28px);
  min-width: 0;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-plaque:hover {
  border-color: rgba(216, 169, 74, 0.5);
  transform: translateY(-2px);
}
.page-about .about-plaque__label {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--red-hot);
}
.page-about .about-plaque__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.3;
  margin: 10px 0 12px;
  color: var(--paper);
}
.page-about .about-plaque__text {
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
  margin: 0;
}
.page-about .about-plaque__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-archive {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--ink);
}
.page-about .about-archive img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.85;
}
.page-about .about-archive__caption {
  padding: 14px 18px;
  font-size: 12.5px;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 认证 ---------- */
.page-about .about-cert__layout {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  grid-template-columns: 1fr;
  align-items: start;
}
.page-about .about-cert__visual {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
  max-width: 420px;
}
.page-about .about-cert__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.page-about .about-cert__body h2 {
  margin-top: 14px;
  color: var(--paper);
}
.page-about .about-certs {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-cert {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: linear-gradient(140deg, rgba(30, 26, 24, 0.95), rgba(18, 16, 15, 0.7));
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-cert:hover,
.page-about .about-cert:focus-within {
  border-color: var(--gold);
  background: linear-gradient(140deg, rgba(200, 52, 43, 0.16), rgba(18, 16, 15, 0.8));
}
.page-about .about-cert__ring {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  box-shadow: inset 0 0 0 4px rgba(216, 169, 74, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-light);
}
.page-about .about-cert__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 6px;
}
.page-about .about-cert__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 260ms var(--ease), opacity 200ms var(--ease);
}
.page-about .about-cert:hover .about-cert__desc,
.page-about .about-cert:focus-within .about-cert__desc,
.page-about .about-cert:focus .about-cert__desc {
  max-height: 180px;
  opacity: 1;
}

/* ---------- 厂商名录 ---------- */
.page-about .about-filter__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.page-about .about-filter__btn {
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 13.5px;
  padding: 9px 18px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-filter__btn:hover,
.page-about .about-filter__btn:focus-visible {
  color: var(--paper);
  border-color: var(--gold);
}
.page-about .about-filter__btn[aria-selected="true"] {
  background: linear-gradient(120deg, var(--red), var(--red-hot));
  border-color: transparent;
  color: var(--paper);
  font-weight: 600;
}
.page-about .about-vendors__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  grid-template-columns: 1fr;
  align-items: start;
}
.page-about .about-vendors__panels {
  display: grid;
  gap: 16px;
  min-width: 0;
}
.page-about .about-vpanel {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 18px;
  min-width: 0;
}
.page-about .about-vpanel[hidden] {
  display: none;
}
.page-about .about-vpanel__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 60ch;
}
.page-about .about-tagcloud {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}
.page-about .about-vendors__side {
  display: grid;
  gap: 16px;
  min-width: 0;
}
.page-about .about-vendors__figure {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}
.page-about .about-vendors__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-about .about-vendors__caption {
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-score {
  border: 1px dashed rgba(216, 169, 74, 0.42);
  border-radius: 14px;
  padding: 18px;
  background: rgba(200, 52, 43, 0.07);
}
.page-about .about-score__label {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: 12px;
}
.page-about .about-score__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 12px;
  padding: 0;
}
.page-about .about-score__list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--paper);
}
.page-about .about-score__list span {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: rgba(216, 169, 74, 0.16);
  color: var(--gold-light);
  font-size: 11px;
}
.page-about .about-score__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  align-items: start;
}
.page-about .about-team h2 {
  margin-top: 14px;
  color: var(--ink);
}
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  min-width: 0;
}
.page-about .about-team__card {
  border: 1px solid rgba(18, 16, 15, 0.14);
  border-radius: 14px;
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.45);
  min-width: 0;
}
.page-about .about-team__card--accent {
  background: linear-gradient(150deg, var(--red), var(--red-hot));
  border-color: transparent;
  color: var(--paper);
}
.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  color: var(--red);
  margin: 0 0 10px;
}
.page-about .about-team__card--accent .about-team__num {
  color: var(--gold-light);
}
.page-about .about-team__role {
  font-size: 14.5px;
  font-weight: 700;
  margin: 0 0 6px;
}
.page-about .about-team__desc {
  font-size: 12.5px;
  line-height: 1.6;
  margin: 0;
  color: rgba(18, 16, 15, 0.62);
}
.page-about .about-team__card--accent .about-team__desc {
  color: rgba(247, 241, 230, 0.85);
}

/* ---------- 生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.page-about .about-eco__stat {
  background: var(--ink-2);
  padding: clamp(18px, 2.4vw, 26px);
  min-width: 0;
}
.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1;
  color: var(--gold-light);
  margin: 0 0 10px;
}
.page-about .about-eco__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .about-eco__text {
  margin-top: 24px;
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  counter-reset: flow;
}
.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 42px 1fr;
  grid-template-areas:
    "no name"
    "no desc";
  gap: 4px 14px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  text-decoration: none;
  background: rgba(18, 16, 15, 0.6);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-visible {
  border-color: var(--gold);
  background: rgba(200, 52, 43, 0.14);
  transform: translateY(-2px);
}
.page-about .about-flow__no {
  grid-area: no;
  font-size: 13px;
  color: var(--red-hot);
  letter-spacing: 0.1em;
  padding-top: 3px;
}
.page-about .about-flow__name {
  grid-area: name;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-flow__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 联系 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(64px, 9vw, 120px);
}
.page-about .about-cta__card {
  display: grid;
  gap: clamp(24px, 3vw, 44px);
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius-card) + 6px);
  padding: clamp(24px, 4vw, 46px);
  background:
    radial-gradient(circle at 88% 8%, rgba(226, 69, 50, 0.3), transparent 58%),
    linear-gradient(160deg, var(--ink-2), var(--ink));
}
.page-about .about-cta__text h2 {
  margin-top: 14px;
  color: var(--paper);
}
.page-about .about-cta__note {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 44ch;
}
.page-about .about-cta__contact {
  min-width: 0;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-eco {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.95fr);
    gap: clamp(32px, 4vw, 64px);
  }
  .page-about .about-timeline {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.6fr);
  }
  .page-about .about-timeline__panels {
    position: relative;
  }
  .page-about .about-plaque {
    grid-column: 1 / -1;
  }
  .page-about .about-cert__layout {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.5fr);
  }
  .page-about .about-vendors__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  }
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-cta__card {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cert__visual {
    position: sticky;
    top: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-matrix__item,
  .page-about .about-plaque,
  .page-about .about-flow__step,
  .page-about .about-cert__desc {
    transition: none;
  }
  .page-about .about-matrix__item:hover,
  .page-about .about-plaque:hover,
  .page-about .about-flow__step:hover {
    transform: none;
  }
  .page-about .about-cert__desc {
    max-height: none;
    opacity: 1;
  }
}
<<<END>>>