.page-about {
  --about-gap: clamp(20px, 3vw, 36px);
  --about-section: clamp(48px, 8vw, 96px);
  display: block;
  background: var(--k8-night);
  color: var(--k8-body);
  overflow-x: hidden;
}

.page-about .k8-crumbs {
  padding: 20px 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--k8-mute);
}

.page-about .k8-crumbs a {
  color: var(--k8-mute);
  text-decoration: none;
}

.page-about .k8-crumbs a:hover,
.page-about .k8-crumbs a:focus-visible {
  color: var(--k8-neon);
}

.page-about .k8-crumbs__sep {
  margin: 0 0.5em;
  opacity: 0.55;
}

/* ---------- 首屏档案卡 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 var(--about-section);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 30% 0;
  pointer-events: none;
  background:
    radial-gradient(58% 78% at 10% 4%, rgba(57, 255, 136, 0.11), transparent 70%),
    radial-gradient(46% 56% at 90% 12%, rgba(255, 154, 61, 0.09), transparent 70%);
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

@media (min-width: 940px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-about .about-dossier {
  position: relative;
  padding: clamp(24px, 3.4vw, 40px);
  background: linear-gradient(160deg, var(--k8-deep) 0%, #071a10 72%);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.42);
}

.page-about .about-dossier::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(24px, 3.4vw, 40px);
  width: 78px;
  height: 4px;
  border-radius: 0 0 2px 2px;
  background: linear-gradient(90deg, var(--k8-neon), var(--k8-amber));
}

.page-about .about-dossier h1 {
  margin: 16px 0 0;
  font-family: var(--k8-font-display);
  font-size: clamp(1.65rem, 4.4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--k8-ink);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--k8-body);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px 24px;
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: 1px dashed var(--k8-line);
}

.page-about .about-facts__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-facts dt {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--k8-mute);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--k8-ink);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--k8-deep);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(4, 17, 11, 0) 42%, rgba(4, 17, 11, 0.72) 100%);
}

/* ---------- 三块内容 ---------- */

.page-about .about-system {
  padding: var(--about-section) 0;
  background: var(--k8-deep);
  border-top: 1px solid var(--k8-line);
  border-bottom: 1px solid var(--k8-line);
}

.page-about .about-system__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

@media (min-width: 880px) {
  .page-about .about-system__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr) minmax(0, 1fr);
  }
}

.page-about .about-slab {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--k8-panel);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
  transition: border-color 0.28s var(--k8-ease), transform 0.28s var(--k8-ease);
}

.page-about .about-slab:hover {
  border-color: var(--k8-neon);
  transform: translateY(-4px);
}

.page-about .about-slab--lead {
  background: linear-gradient(150deg, var(--k8-panel) 0%, #0a2317 100%);
  border-left: 3px solid var(--k8-neon);
}

.page-about .about-slab .k8-tag {
  align-self: flex-start;
}

.page-about .about-slab h3 {
  margin: 0;
  font-family: var(--k8-font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--k8-ink);
}

.page-about .about-slab p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--k8-body);
}

/* ---------- 发展历程 ---------- */

.page-about .about-track {
  padding: var(--about-section) 0;
}

.page-about .about-rail {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--k8-line), rgba(30, 77, 54, 0.18));
}

@media (min-width: 820px) {
  .page-about .about-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rail::before {
    left: 6px;
    right: 6px;
    top: 26px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--k8-line), rgba(30, 77, 54, 0.18));
  }
}

.page-about .about-rail__item {
  position: relative;
}

.page-about .about-rail__btn {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  grid-template-areas:
    "dot year"
    "dot label";
  align-items: center;
  gap: 2px 12px;
  width: 100%;
  padding: 12px 8px 12px 0;
  background: transparent;
  border: 0;
  border-radius: var(--k8-rad);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.25s var(--k8-ease);
}

@media (min-width: 820px) {
  .page-about .about-rail__btn {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "dot"
      "year"
      "label";
    gap: 8px;
    padding: 20px 10px 10px 0;
    justify-items: start;
  }
}

.page-about .about-rail__btn:focus-visible {
  outline: 2px solid var(--k8-neon);
  outline-offset: 3px;
}

.page-about .about-rail__dot {
  grid-area: dot;
  justify-self: center;
  align-self: center;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--k8-night);
  border: 2px solid var(--k8-line);
  transition: background 0.25s var(--k8-ease), border-color 0.25s var(--k8-ease),
    box-shadow 0.25s var(--k8-ease);
}

@media (min-width: 820px) {
  .page-about .about-rail__dot {
    width: 12px;
    height: 12px;
  }
}

.page-about .about-rail__year {
  grid-area: year;
  font-family: var(--k8-font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--k8-mute);
  transition: color 0.25s var(--k8-ease);
}

.page-about .about-rail__label {
  grid-area: label;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--k8-mute);
  transition: color 0.25s var(--k8-ease);
}

.page-about .about-rail__btn[aria-pressed="true"] .about-rail__year,
.page-about .about-rail__btn.is-active .about-rail__year {
  color: var(--k8-neon);
}

.page-about .about-rail__btn[aria-pressed="true"] .about-rail__label,
.page-about .about-rail__btn.is-active .about-rail__label {
  color: var(--k8-body);
}

.page-about .about-rail__btn[aria-pressed="true"] .about-rail__dot,
.page-about .about-rail__btn.is-active .about-rail__dot {
  background: var(--k8-neon);
  border-color: var(--k8-neon);
  box-shadow: 0 0 0 5px rgba(57, 255, 136, 0.14);
}

.page-about .about-phases {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-phase {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--k8-panel);
  border: 1px solid var(--k8-line);
  border-left: 3px solid var(--k8-neon);
  border-radius: var(--k8-rad);
}

.page-about .about-phase h3 {
  margin: 0 0 10px;
  font-family: var(--k8-font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--k8-ink);
}

.page-about .about-phase p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.74;
  color: var(--k8-body);
}

.page-about .about-phase p + p {
  margin-top: 10px;
}

.page-about .about-track__figure {
  margin: 34px 0 0;
  overflow: hidden;
  background: var(--k8-deep);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
}

.page-about .about-track__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-track__figure figcaption {
  padding: 14px 18px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--k8-mute);
  border-top: 1px dashed var(--k8-line);
}

/* ---------- 团队规模 ---------- */

.page-about .about-team {
  padding: var(--about-section) 0;
  background: var(--k8-deep);
  border-top: 1px solid var(--k8-line);
  border-bottom: 1px solid var(--k8-line);
}

.page-about .about-team__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

.page-about .about-team__figure {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--k8-panel);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0 0;
}

@media (min-width: 660px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-stats__item {
  padding: 16px 14px;
  background: var(--k8-panel);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
  transition: border-color 0.25s var(--k8-ease);
}

.page-about .about-stats__item:hover {
  border-color: var(--k8-neon);
}

.page-about .about-stats dt {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--k8-mute);
}

.page-about .about-stats dd {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin: 8px 0 0;
}

.page-about .about-stats__num {
  font-family: var(--k8-font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--k8-amber);
}

.page-about .about-stats__unit {
  font-size: 0.78rem;
  color: var(--k8-mute);
}

.page-about .about-team__foot {
  margin: 22px 0 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--k8-mute);
}

.page-about .about-team__foot .k8-num {
  font-weight: 700;
  color: var(--k8-ink);
}

/* ---------- 合作与标准 ---------- */

.page-about .about-partners {
  padding: var(--about-section) 0;
}

.page-about .about-partners__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 30px;
}

@media (min-width: 860px) {
  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 32px;
    align-items: start;
  }
}

.page-about .about-partners__lede {
  position: relative;
  padding: clamp(24px, 3vw, 34px);
  background: var(--k8-paper);
  border: 1px solid var(--k8-paper-edge);
  border-radius: var(--k8-rad);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.34);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--k8-font-mono);
  font-size: clamp(2.6rem, 6vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: #0b2418;
}

.page-about .about-partners__lede p {
  margin: 14px 0 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: #2c4536;
}

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

.page-about .about-standard li {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: var(--k8-panel);
  border: 1px solid var(--k8-line);
  border-radius: var(--k8-rad);
  transition: border-color 0.25s var(--k8-ease), transform 0.25s var(--k8-ease);
}

.page-about .about-standard li:hover {
  border-color: var(--k8-neon);
  transform: translateX(3px);
}

.page-about .about-standard .k8-tag {
  justify-self: start;
}

.page-about .about-standard p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--k8-body);
}

/* ---------- 品牌认证与入口 ---------- */

.page-about .about-assure {
  padding: 0 0 var(--about-section);
}

.page-about .about-assure__card {
  position: relative;
  padding: clamp(28px, 4vw, 48px);
  background:
    radial-gradient(88% 128% at 100% 0%, rgba(57, 255, 136, 0.13), transparent 62%),
    linear-gradient(160deg, var(--k8-panel) 0%, #071b11 100%);
  border: 1px solid var(--k8-line);
  border-top: 3px solid var(--k8-neon);
  border-radius: var(--k8-rad);
}

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

.page-about .about-assure__foot {
  margin: 24px 0 0;
  padding-top: 20px;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--k8-mute);
  border-top: 1px dashed var(--k8-line);
}

.page-about .about-assure__foot a {
  color: var(--k8-neon-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 217, 0.35);
}

.page-about .about-assure__foot a:hover,
.page-about .about-assure__foot a:focus-visible {
  color: var(--k8-neon);
  border-bottom-color: var(--k8-neon);
}
<<<END>>>