.page-about {
  --about-card: rgba(19, 32, 69, .58);
  --about-card-2: rgba(19, 32, 69, .34);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-3) 100%);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .sec-head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .sec-head .h2 {
  margin: 8px 0 14px;
}

.page-about .eyebrow {
  color: var(--gold);
  letter-spacing: .22em;
  text-transform: uppercase;
  font-size: 12px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 95% at 88% 6%, rgba(124, 92, 255, .18), transparent 62%),
    radial-gradient(90% 75% at 8% 96%, rgba(38, 185, 138, .12), transparent 64%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  margin-top: clamp(18px, 3vw, 32px);
  align-items: center;
}

.page-about .about-hero__text .h1 {
  margin: 10px 0 18px;
  max-width: 20ch;
  text-shadow: 0 0 1px rgba(201, 162, 39, .55);
}

.page-about .about-hero__text .lead {
  color: var(--mist);
  max-width: 58ch;
}

.page-about .about-hero__art {
  width: 100%;
  max-width: 400px;
  margin-inline: auto;
  position: relative;
}

.page-about .about-hero__art svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-quicknav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-about .about-quicknav a {
  display: inline-block;
  padding: 7px 13px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  background: var(--about-card-2);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-quicknav a:hover,
.page-about .about-quicknav a:focus-visible {
  color: var(--gold-hi);
  border-color: var(--line);
  background: rgba(201, 162, 39, .12);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 6vw, 80px);
  }
  .page-about .about-hero__art {
    margin-inline: 0 auto;
  }
}

/* ---------- 通用图文 ---------- */
.page-about .about-journey__fig,
.page-about .about-team__fig,
.page-about .about-sourcing__fig {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

.page-about figure.frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about figure.frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 14px;
  background: var(--ink-2);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 900px;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px) 58px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 44px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(201, 162, 39, 0));
}

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--ink-2);
  border: 1px solid var(--line);
  color: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}

.page-about .timeline__marker .mono {
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .timeline__body {
  padding: 18px 20px 20px;
  background: var(--about-card);
  border: 1px solid var(--line-soft);
  border-left: 2px solid rgba(201, 162, 39, .45);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.page-about .timeline__item:hover .timeline__body,
.page-about .timeline__item:focus-within .timeline__body {
  background: rgba(19, 32, 69, .78);
  border-left-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .timeline__item:hover .timeline__marker {
  background: var(--gold);
  color: var(--ink);
  transform: translateY(-2px);
}

.page-about .timeline__body .h3 {
  margin: 0 0 10px;
  color: var(--gold-hi);
}

.page-about .timeline__body p {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .timeline__facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .timeline__facts li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.6;
}

.page-about .timeline__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 1px;
  background: var(--jade);
}

/* ---------- 职责矩阵 ---------- */
.page-about .matrix {
  position: relative;
}

.page-about .matrix__inputs {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-about .matrix__tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .matrix__tab {
  display: block;
  cursor: pointer;
  padding: 13px 10px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--mist);
  background: var(--about-card);
  border: 1px solid var(--line-soft);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .matrix__tab:hover {
  color: var(--gold-hi);
  border-color: var(--line);
}

.page-about #tab-safety:checked ~ .matrix__tabs .matrix__tab--safety,
.page-about #tab-content:checked ~ .matrix__tabs .matrix__tab--content,
.page-about #tab-design:checked ~ .matrix__tabs .matrix__tab--design,
.page-about #tab-support:checked ~ .matrix__tabs .matrix__tab--support {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .matrix__panels {
  margin-top: 16px;
}

.page-about .matrix__panel {
  display: none;
  padding: clamp(20px, 3vw, 34px);
  background: var(--about-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .matrix__panel--safety {
  display: block;
}

.page-about #tab-safety:checked ~ .matrix__panels .matrix__panel--safety,
.page-about #tab-content:checked ~ .matrix__panels .matrix__panel--content,
.page-about #tab-design:checked ~ .matrix__panels .matrix__panel--design,
.page-about #tab-support:checked ~ .matrix__panels .matrix__panel--support {
  display: block;
}

.page-about #tab-content:checked ~ .matrix__panels .matrix__panel--safety,
.page-about #tab-design:checked ~ .matrix__panels .matrix__panel--safety,
.page-about #tab-support:checked ~ .matrix__panels .matrix__panel--safety {
  display: none;
}

.page-about .matrix__panel .h3 {
  margin: 0 0 12px;
  color: var(--gold-hi);
}

.page-about .matrix__panel p {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .matrix__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .matrix__list li {
  position: relative;
  padding: 10px 12px 10px 26px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  background: rgba(5, 10, 28, .5);
  border-left: 1px solid var(--line-soft);
}

.page-about .matrix__list li::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 1.05em;
  width: 7px;
  height: 7px;
  background: var(--violet);
  transform: rotate(45deg);
}

@media (min-width: 760px) {
  .page-about .matrix__tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .matrix__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .matrix__list li:first-child {
    grid-column: 1 / -1;
  }
}

/* ---------- 内容来源 ---------- */
.page-about .about-sourcing__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-sourcing__text > p {
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .flow {
  list-style: none;
  margin: 26px 0 28px;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: flow;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: var(--about-card-2);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .flow__no {
  font-size: 20px;
  line-height: 1.2;
  color: var(--violet);
  letter-spacing: .04em;
}

.page-about .flow__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-sourcing__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-sourcing__side .about-sourcing__fig {
  margin: 0;
}

.page-about .supply-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 900px) {
  .page-about .about-sourcing__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 运营与备案 ---------- */
.page-about .about-base {
  position: relative;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(200deg, rgba(201, 162, 39, .07), rgba(10, 19, 48, 0) 58%);
}

.page-about .about-base__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-base__text > p {
  color: var(--mist);
  font-size: 16px;
  line-height: 1.8;
  max-width: 62ch;
}

.page-about .about-base__text .btn {
  margin-top: 24px;
}

.page-about .seal-panel {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--about-card);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  box-shadow: 0 18px 40px rgba(5, 10, 28, .5);
}

.page-about .seal-panel::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 16px;
  width: 34px;
  height: 34px;
  border: 2px solid rgba(201, 162, 39, .5);
  transform: rotate(45deg);
}

.page-about .seal-panel__label {
  display: block;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .seal-panel__value {
  display: block;
  margin: 8px 0 22px;
  font-size: clamp(18px, 3vw, 22px);
  color: var(--gold-hi);
  letter-spacing: .06em;
}

.page-about .seal-panel__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .seal-panel__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.page-about .seal-panel__row dt {
  font-size: 13px;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .seal-panel__row dd {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
  text-align: right;
}

.page-about .seal-panel__row dd.mono {
  color: var(--jade);
}

@media (min-width: 900px) {
  .page-about .about-base__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: center;
  }
}

/* ---------- 服务指标 ---------- */
.page-about .about-stat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stat-grid .stat {
  padding: 22px 20px;
  background: var(--ink-2);
}

.page-about .about-stat-grid .stat__value {
  display: block;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .about-stat-grid .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-metrics__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 76ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-metrics__note a {
  color: var(--gold-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 640px) {
  .page-about .about-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(60px, 8vw, 110px);
}

.page-about .about-cta__panel {
  padding: clamp(26px, 4vw, 48px);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(124, 92, 255, .22), transparent 60%),
    var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-cta__text .h2 {
  margin: 0 0 12px;
}

.page-about .about-cta__text p {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-about .about-cta__panel {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
  }
  .page-about .about-cta__links {
    margin-top: 0;
    flex-direction: column;
    align-items: stretch;
  }
}
<<<END>>>