.page-about {
  --about-ink: #C6CEE4;
  --about-ink-strong: #F4F6F8;
  --about-ink-muted: #9AA6C4;
  --about-cyan-ink: #0B7C74;
  --about-metric: 40px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 56px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 85% at 84% 6%, rgba(47, 227, 214, 0.16), transparent 58%),
    linear-gradient(180deg, rgba(11, 18, 48, 0.88) 0%, rgba(11, 18, 48, 0.95) 56%, var(--ink-night) 100%);
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-ink-muted);
}

.page-about .breadcrumb a {
  color: var(--about-ink-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .breadcrumb__sep {
  color: var(--cyan);
  font-size: 10px;
}

.page-about .about-hero__eyebrow {
  margin: 28px 0 0;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 8.6vw, 86px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--about-ink-strong);
  max-width: 16em;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 46em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-ink);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 40px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

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

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: var(--about-metric);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-ink-muted);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 56px 0;
  border-top: 1px solid var(--line-soft);
  color: var(--about-ink);
}

.page-about .about-sec > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-container--narrow {
  max-width: 780px;
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 5.4vw, 42px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--about-ink-strong);
}

.page-about .about-p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: inherit;
}

.page-about .about-p--wide {
  max-width: 62em;
}

.page-about .about-p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

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

/* ---------- S-01 三条主线 ---------- */
.page-about .about-lines {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-lines__item {
  background: var(--ink-deep);
  padding: 18px 20px;
  display: grid;
  gap: 6px;
}

.page-about .about-lines__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-lines__v {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink);
}

/* ---------- S-02 流程 ---------- */
.page-about .about-sec--flow {
  background: linear-gradient(165deg, var(--teal-deep) 0%, var(--teal-darker) 100%);
}

.page-about .about-split {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-split__col {
  min-width: 0;
}

.page-about .about-fieldbox {
  margin-top: 26px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  background: rgba(47, 227, 214, 0.05);
}

.page-about .about-fieldbox__head {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mint);
  text-transform: uppercase;
}

.page-about .about-fields {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-fields li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--mint);
  background: rgba(11, 18, 48, 0.36);
}

.page-about .about-track {
  position: relative;
  display: grid;
  gap: 0;
  padding: 22px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(47, 227, 214, 0.08), rgba(47, 227, 214, 0.015));
}

.page-about .about-track__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-track__row:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-track__badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-align: center;
  padding: 5px 6px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink-night);
  white-space: nowrap;
}

.page-about .about-track__row--b .about-track__badge {
  background: var(--mint);
}

.page-about .about-track__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink);
}

.page-about .about-track__merge {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-flowfig {
  margin: 32px 0 0;
}

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

/* ---------- S-03 时间轴 ---------- */
.page-about .about-sec--timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 28px 30px;
  outline: none;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 3px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink-night);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-timeline__season {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--about-ink-muted);
}

.page-about .about-timeline__title {
  margin: 6px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--about-ink-strong);
}

.page-about .about-timeline__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-ink-muted);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-visible .about-timeline__dot {
  background: var(--cyan);
  transform: scale(1.25);
}

.page-about .about-timeline__item:focus-visible {
  box-shadow: 0 0 0 2px var(--line-cyan);
  border-radius: 2px;
}

.page-about .about-timeline__item--now .about-timeline__dot {
  border-color: var(--goal);
  background: var(--goal);
  box-shadow: 0 0 0 4px rgba(255, 107, 61, 0.18);
}

.page-about .about-timeline__item--now .about-timeline__season {
  color: var(--goal);
}

.page-about .about-timeline__item--now .about-timeline__title {
  color: var(--goal);
}

/* ---------- S-04 合作 ---------- */
.page-about .about-sec--coop {
  background: linear-gradient(165deg, var(--indigo) 0%, var(--indigo-deep) 100%);
}

.page-about .about-grid3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-coop {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 18, 48, 0.42);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-coop:hover {
  transform: translateY(-2px);
  border-color: var(--line-cyan);
}

.page-about .about-coop__tag {
  margin: 0;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  padding: 4px 9px;
  border: 1px solid var(--line-cyan);
  border-radius: 2px;
  color: var(--mint);
}

.page-about .about-coop__title {
  margin: 16px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--about-ink-strong);
}

.page-about .about-coop__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink);
}

.page-about .about-chips__head {
  margin: 40px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--about-ink-muted);
  text-transform: uppercase;
}

.page-about .about-chips {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 18, 48, 0.5);
  outline: none;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-chip__name {
  font-size: 14px;
  color: var(--about-ink-strong);
  letter-spacing: 0.04em;
}

.page-about .about-chip:hover,
.page-about .about-chip:focus-visible {
  border-color: var(--cyan);
  background: rgba(47, 227, 214, 0.1);
  transform: translateY(-2px);
}

.page-about .about-chip__hint {
  display: none;
}

/* ---------- S-05 品牌主张 ---------- */
.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--graphite);
}

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

.page-about .about-sec--paper .about-section-index--ink {
  color: var(--about-cyan-ink);
}

.page-about .about-claim {
  display: grid;
  gap: 32px;
}

.page-about .about-pledge {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-pledge__item {
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
}

.page-about .about-pledge__k {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

.page-about .about-pledge__v {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4A5468;
}

.page-about .about-stamp {
  margin: 0;
  background: #E8EBEF;
}

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

/* ---------- S-06 收尾 ---------- */
.page-about .about-sec--cta {
  background: linear-gradient(180deg, var(--ink-night) 0%, var(--ink-deep) 100%);
}

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

.page-about .about-sec--cta .data-note {
  margin-top: 24px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-ink-muted);
}

.page-about .about-sec--cta .data-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-sec--cta .data-note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --about-metric: 48px;
  }

  .page-about .about-hero {
    padding: 32px 0 76px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-sec {
    padding: 72px 0;
  }

  .page-about .about-grid3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-sec {
    padding: 96px 0;
  }

  .page-about .about-claim {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-flowfig {
    margin-top: 48px;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 196px;
    gap: 22px;
    overflow-x: auto;
    padding-bottom: 14px;
    scroll-snap-type: x proximity;
  }

  .page-about .about-timeline__item {
    padding: 32px 0 0;
    scroll-snap-align: start;
  }

  .page-about .about-timeline__item::before {
    left: 9px;
    right: -22px;
    top: 5px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .about-timeline__item:last-child::before {
    right: 0;
  }

  .page-about .about-timeline__dot {
    left: 0;
    top: 0;
  }

  .page-about .about-timeline__item:last-child {
    padding-bottom: 0;
  }
}

@media (min-width: 861px) and (hover: hover) and (pointer: fine) {
  .page-about .about-timeline__desc {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.34s var(--ease), opacity 0.34s var(--ease), margin-top 0.34s var(--ease);
  }

  .page-about .about-timeline__item:hover .about-timeline__desc,
  .page-about .about-timeline__item:focus-visible .about-timeline__desc {
    max-height: 9em;
    opacity: 1;
    margin-top: 8px;
  }

  .page-about .about-chip {
    padding-right: 14px;
  }

  .page-about .about-chip__hint {
    display: block;
    max-width: 0;
    opacity: 0;
    overflow: hidden;
    white-space: nowrap;
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--mint);
    transition: max-width 0.3s var(--ease), opacity 0.3s var(--ease), margin-left 0.3s var(--ease);
  }

  .page-about .about-chip:hover .about-chip__hint,
  .page-about .about-chip:focus-visible .about-chip__hint {
    max-width: 220px;
    opacity: 1;
    margin-left: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-coop,
  .page-about .about-chip,
  .page-about .about-timeline__dot {
    transition: color 0.2s linear, border-color 0.2s linear, background-color 0.2s linear;
  }

  .page-about .about-coop:hover,
  .page-about .about-chip:hover {
    transform: none;
  }

  .page-about .about-timeline__item:hover .about-timeline__dot,
  .page-about .about-timeline__item:focus-visible .about-timeline__dot {
    transform: none;
  }
}
<<<END>>>