.page-about {
  --about-line-soft: rgba(23, 18, 15, 0.12);
  --about-line-faint: rgba(23, 18, 15, 0.08);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  padding: clamp(22px, 5vw, 44px) 0 clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--line-cyan);
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(0, 229, 195, 0.16), transparent 60%),
    linear-gradient(160deg, #0B3D2E 0%, #0A3227 58%, #082A21 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    repeating-linear-gradient(90deg, rgba(0, 229, 195, 0.07) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(0, 229, 195, 0.05) 0 1px, transparent 1px 72px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(244, 241, 230, 0.55);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 10px;
  color: rgba(244, 241, 230, 0.32);
}

.page-about .breadcrumb__link {
  color: rgba(244, 241, 230, 0.74);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--speed) ease, border-color var(--speed) ease;
}

.page-about .breadcrumb__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

.page-about .about-hero__eyebrow {
  margin: 22px 0 0;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 33em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(244, 241, 230, 0.76);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__actions .btn {
  text-decoration: none;
}

.page-about .about-hero__plaque {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line-cyan);
  background: rgba(15, 90, 69, 0.38);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-hero__plaque-year {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(56px, 9vw, 88px);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: var(--cyan);
}

.page-about .about-hero__plaque-label {
  margin: 8px 0 0;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(244, 241, 230, 0.55);
}

.page-about .about-hero__plaque-list {
  margin: 16px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-mist);
  display: grid;
  gap: 9px;
}

.page-about .about-hero__plaque-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-hero__plaque-list .k {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(244, 241, 230, 0.5);
}

.page-about .about-hero__plaque-list .v {
  font-size: 13px;
  color: var(--paper);
}

/* ---------- 通用分区 ---------- */
.page-about .about-start,
.page-about .about-flow-sec,
.page-about .about-eco,
.page-about .about-close {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-history {
  padding: clamp(44px, 7vw, 88px) 0;
  background: var(--mist);
}

.page-about .about-grid {
  display: grid;
  gap: clamp(16px, 2.5vw, 28px);
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-rail__num {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.page-about .about-rail__num::after {
  content: "";
  display: inline-block;
  width: 26px;
  height: 1px;
  margin-left: 10px;
  vertical-align: middle;
  background: currentColor;
  opacity: 0.45;
}

.page-about .about-rail__cap {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--steel);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 44em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(23, 18, 15, 0.8);
}

.page-about .about-p--light {
  color: rgba(244, 241, 230, 0.78);
}

.page-about .about-inline-link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 90, 69, 0.4);
}

.page-about .about-inline-link:hover {
  border-bottom-color: var(--teal);
}

/* ---------- 参考图 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line-soft);
}

.page-about .about-figure__cap {
  margin: 8px 0 0;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 01 起点 ---------- */
.page-about .about-start__stats {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.page-about .about-stat {
  background: var(--paper);
  padding: 20px;
}

.page-about .about-stat__num {
  font-family: var(--ff-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--forest);
}

.page-about .about-stat__unit {
  margin-left: 4px;
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(23, 18, 15, 0.62);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-tl {
  margin-top: 26px;
}

.page-about .about-node {
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 36px) 30px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: rgba(23, 18, 15, 0.16);
}

.page-about .about-node:last-of-type::before {
  display: none;
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--mist);
  border: 2px solid var(--teal);
  transition: background var(--speed) ease, box-shadow var(--speed) ease;
}

.page-about .about-node:hover::after,
.page-about .about-node:focus::after {
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(15, 90, 69, 0.14);
}

.page-about .about-node__year {
  display: block;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--teal);
}

.page-about .about-node__title {
  margin: 8px 0 8px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(23, 18, 15, 0.78);
}

.page-about .about-node__more {
  margin: 10px 0 0;
  max-width: 42em;
  padding-left: 12px;
  border-left: 1px solid rgba(23, 18, 15, 0.2);
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(23, 18, 15, 0.6);
}

.page-about .about-figure--tl {
  margin: 4px 0 30px;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  padding: clamp(44px, 7vw, 96px) 0;
  background: linear-gradient(170deg, var(--forest) 0%, #08281d 90%);
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(0deg, rgba(0, 229, 195, 0.07) 0 1px, transparent 1px 56px);
}

.page-about .about-team .about-grid {
  position: relative;
  z-index: 1;
}

.page-about .about-team .about-h2 {
  color: var(--paper);
}

.page-about .about-team .about-rail__num {
  color: var(--cyan);
}

.page-about .about-team .about-rail__cap {
  color: rgba(244, 241, 230, 0.5);
}

.page-about .about-team__cols {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-bars {
  margin: 26px 0 30px;
}

.page-about .about-bars__axis {
  display: flex;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-mist);
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(244, 241, 230, 0.42);
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.page-about .about-bar__label {
  font-size: 13px;
  color: rgba(244, 241, 230, 0.8);
}

.page-about .about-bar__track {
  display: block;
  height: 10px;
  background: rgba(244, 241, 230, 0.1);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: var(--v, 0%);
  background: linear-gradient(90deg, rgba(0, 229, 195, 0.72), var(--cyan));
  transition: width 320ms ease;
}

.page-about .about-bar__num {
  font-family: var(--ff-mono);
  font-size: 13px;
  text-align: right;
  color: var(--cyan);
}

.page-about .about-bar--edit { --v: 60%; }
.page-about .about-bar--dev { --v: 90%; }
.page-about .about-bar--ops { --v: 40%; }

.page-about .about-team .accordion {
  border-top: 1px solid var(--line-mist);
}

.page-about .about-team .accordion__item {
  border-bottom: 1px solid var(--line-mist);
}

.page-about .about-team .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 14px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--ff-display);
  font-size: 16px;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-team .accordion__trigger:hover {
  color: var(--cyan);
}

.page-about .about-team .accordion__trigger:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-team .accordion__sign {
  font-family: var(--ff-mono);
  color: var(--cyan);
}

.page-about .about-team .accordion__panel {
  padding: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 241, 230, 0.72);
}

.page-about .about-team .accordion__panel p {
  margin: 0;
  max-width: 40em;
}

.page-about .about-figure--team img {
  border-color: var(--line-mist);
}

.page-about .about-figure--team .about-figure__cap {
  color: rgba(244, 241, 230, 0.48);
}

/* ---------- 04 工序 ---------- */
.page-about .about-figure--wide {
  margin: 24px 0 28px;
}

.page-about .about-flow {
  display: grid;
  gap: 1px;
  margin-top: 6px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.page-about .about-step {
  background: var(--paper);
  padding: 22px 20px 26px;
}

.page-about .about-step__no {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

.page-about .about-step__title {
  margin: 10px 0 8px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(23, 18, 15, 0.72);
}

.page-about .about-flow__note {
  margin: 22px 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(23, 18, 15, 0.7);
}

.page-about .about-flow__note a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 90, 69, 0.4);
}

.page-about .about-flow__note a:hover {
  border-bottom-color: var(--teal);
}

/* ---------- 05 合作 ---------- */
.page-about .about-eco {
  border-top: 1px solid var(--about-line-faint);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 1px;
  margin: 24px 0;
  background: var(--about-line-soft);
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-eco__cell {
  background: var(--paper);
  padding: 22px 20px;
}

.page-about .about-eco__num {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--forest);
}

.page-about .about-eco__unit {
  margin-left: 4px;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .about-eco__label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(23, 18, 15, 0.66);
}

/* ---------- 收口 ---------- */
.page-about .about-close {
  border-top: 1px solid var(--about-line-faint);
}

.page-about .about-close__inner {
  display: grid;
  gap: 14px;
  max-width: 860px;
}

.page-about .about-close__mark {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(64px, 10vw, 104px);
  line-height: 0.55;
  color: var(--orange);
}

.page-about .about-close__title {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-close__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(23, 18, 15, 0.72);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.page-about .about-close__actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-start__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
    align-items: end;
    gap: 48px;
  }

  .page-about .about-grid {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    position: sticky;
    top: calc(var(--top-h) + 24px);
    align-self: start;
  }

  .page-about .about-rail__num::after {
    display: none;
  }

  .page-about .about-rail__cap {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .about-team__cols {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-bar {
    grid-template-columns: 88px minmax(0, 1fr) 48px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .about-node__more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--speed) ease, opacity var(--speed) ease, margin-top var(--speed) ease;
  }

  .page-about .about-node:hover .about-node__more,
  .page-about .about-node:focus .about-node__more {
    max-height: 8em;
    margin-top: 10px;
    padding-top: 4px;
    padding-bottom: 4px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__more,
  .page-about .about-bar__fill {
    transition: none;
  }
}
<<<END>>>