.page-about {
  --about-pad: clamp(44px, 7vw, 92px);
  --about-rule: rgba(215, 222, 234, 0.16);
  --about-rule-soft: rgba(215, 222, 234, 0.08);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.85);
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 12%, rgba(255, 106, 42, 0.22), transparent 52%),
    radial-gradient(circle at 18% 88%, rgba(53, 224, 194, 0.14), transparent 55%),
    linear-gradient(180deg, rgba(7, 12, 24, 0.55) 0%, rgba(7, 12, 24, 0.96) 100%);
}

.page-about .about-hero .content-wrap {
  padding-top: clamp(28px, 4vw, 44px);
  padding-bottom: var(--about-pad);
}

.page-about .breadcrumb {
  margin-bottom: 22px;
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--about-rule);
  padding: clamp(24px, 4.2vw, 52px);
  background: linear-gradient(155deg, rgba(16, 26, 48, 0.78) 0%, rgba(7, 12, 24, 0.52) 100%);
  backdrop-filter: blur(2px);
}

.page-about .about-hero__corner {
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.page-about .about-hero__corner--tl {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--orange);
  border-left: 2px solid var(--orange);
}

.page-about .about-hero__corner--br {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
}

.page-about .about-hero__frame .eyebrow {
  margin: 0 0 16px;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--silver);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 660px;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero__ticks {
  margin: 30px 0 4px;
  height: 14px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--about-rule) 0 1px,
    transparent 1px 14px
  );
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule-soft);
}

.page-about .about-readout__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(11, 20, 37, 0.72);
  border-left: 1px solid var(--about-rule);
}

.page-about .about-readout__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-readout__plus {
  font-size: 0.55em;
  color: var(--orange);
  margin-left: 2px;
}

.page-about .about-readout__label {
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 通用区块头 ---------- */
.page-about .section-head {
  margin-bottom: 34px;
}

.page-about .section-head .eyebrow {
  margin: 0 0 12px;
}

.page-about .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.005em;
  color: var(--silver);
}

.page-about .about-clients__intro,
.page-about .about-timeline__intro,
.page-about .about-checks__intro,
.page-about .crew-copy__lede,
.page-about .partners-copy__text {
  margin: 0;
  max-width: 680px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */
.page-about .about-clients {
  padding: var(--about-pad) 0;
  background: var(--ink);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .client-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .client-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 26px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .client-row__index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .client-row__body {
  min-width: 0;
}

.page-about .client-row__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.3;
  color: var(--silver);
}

.page-about .client-row__text {
  margin: 0;
  max-width: 720px;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .client-row__tag {
  grid-column: 2;
  justify-self: start;
  margin-top: 14px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  background:
    linear-gradient(90deg, var(--about-rule-soft) 0 1px, transparent 1px 100%) 0 0 / 96px 100%,
    var(--orbit-deep);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.page-about .tl-jump__link {
  display: inline-block;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--about-rule);
  background: rgba(16, 26, 48, 0.6);
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.page-about .tl-jump__link:hover,
.page-about .tl-jump__link:focus-visible {
  color: var(--ink);
  background: var(--orange);
  border-color: var(--orange);
  outline: none;
}

.page-about .tl-layout {
  display: grid;
  gap: 30px;
}

.page-about .tl-aside .figure {
  margin: 0;
}

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

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange) 0%, rgba(53, 224, 194, 0.55) 48%, var(--about-rule) 100%);
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 14px;
  padding: 20px 20px 22px 46px;
  border: 1px solid var(--about-rule);
  background: rgba(16, 26, 48, 0.55);
  scroll-margin-top: 96px;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 26px;
  width: 11px;
  height: 11px;
  background: var(--orbit-deep);
  border: 2px solid var(--orange);
  transform: rotate(45deg);
}

.page-about .tl-item:hover {
  border-color: rgba(215, 222, 234, 0.34);
  background: rgba(16, 26, 48, 0.82);
}

.page-about .tl-item:target {
  border-color: var(--orange);
  background: rgba(255, 106, 42, 0.08);
}

.page-about .tl-item:target::before {
  background: var(--orange);
}

.page-about .tl-item__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .tl-item__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.3;
  color: var(--silver);
}

.page-about .tl-item__text {
  margin: 0;
  max-width: 660px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  padding: var(--about-pad) 0;
  background: var(--ink);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .crew-layout {
  display: grid;
  gap: 34px;
}

.page-about .crew-figure {
  margin: 26px 0 0;
}

.page-about .crew-wall {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .crew-cell {
  padding: 24px 20px 26px;
  background: var(--orbit-soft);
}

.page-about .crew-cell--cream {
  background: var(--cream);
}

.page-about .crew-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
  margin-bottom: 12px;
}

.page-about .crew-cell--cream .crew-cell__num {
  color: var(--clay);
}

.page-about .crew-cell__title {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--silver);
}

.page-about .crew-cell--cream .crew-cell__title {
  color: var(--ink);
}

.page-about .crew-cell__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .crew-cell--cream .crew-cell__text {
  color: #2C3648;
}

/* ---------- 校验流程 ---------- */
.page-about .about-checks {
  padding: var(--about-pad) 0;
  background: var(--orbit-deep);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .check-track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .check-step {
  position: relative;
  padding: 26px 22px 28px;
  background: rgba(7, 12, 24, 0.72);
}

.page-about .check-step::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 106, 42, 0));
}

.page-about .check-step:nth-child(2)::after {
  background: linear-gradient(90deg, var(--signal), rgba(244, 201, 93, 0));
}

.page-about .check-step:nth-child(3)::after {
  background: linear-gradient(90deg, var(--cyan), rgba(53, 224, 194, 0));
}

.page-about .check-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  margin-bottom: 14px;
}

.page-about .check-step__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--silver);
}

.page-about .check-step__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: var(--about-pad) 0;
  background: var(--ink);
  border-bottom: 1px solid var(--about-rule);
}

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

.page-about .partners-copy__text + .partners-copy__text {
  margin-top: 16px;
}

.page-about .partners-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .partners-board__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--orbit);
}

.page-about .partners-board__cell--clay {
  background: var(--clay);
}

.page-about .partners-board__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .partners-board__cell--clay .partners-board__label {
  color: rgba(7, 12, 24, 0.68);
}

.page-about .partners-board__value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .partners-board__cell--clay .partners-board__value {
  color: var(--ink);
}

.page-about .partners-board__value--word {
  font-size: 26px;
  letter-spacing: 0.02em;
}

.page-about .partners-board__unit {
  font-size: 0.6em;
  color: var(--orange);
  margin-left: 2px;
}

.page-about .partners-board__note {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .partners-board__cell--clay .partners-board__note {
  color: rgba(7, 12, 24, 0.78);
}

/* ---------- 开始使用 ---------- */
.page-about .about-start {
  padding: var(--about-pad) 0;
  background: var(--orbit-deep);
}

.page-about .start-panel {
  border: 1px solid var(--about-rule);
  padding: clamp(24px, 4vw, 48px);
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 106, 42, 0.18), transparent 48%),
    linear-gradient(160deg, rgba(16, 26, 48, 0.9), rgba(7, 12, 24, 0.94));
}

.page-about .start-ways {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .start-way {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  background: rgba(7, 12, 24, 0.66);
}

.page-about .start-way__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .start-way__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--silver);
}

.page-about .start-way__text {
  margin: 0;
  flex: 1 1 auto;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .start-way__link {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 194, 0.45);
  padding-bottom: 2px;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .start-way__link:hover,
.page-about .start-way__link:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
  outline: none;
}

.page-about .start-panel__foot {
  display: grid;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--about-rule);
}

.page-about .start-panel__note {
  margin: 0;
  max-width: 620px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .start-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 小屏微调 ---------- */
@media (max-width: 400px) {
  .page-about .about-readout {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .client-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .client-row__index {
    padding-top: 0;
  }

  .page-about .client-row__tag {
    grid-column: 1;
  }
}

/* ---------- 中屏 ---------- */
@media (min-width: 620px) {
  .page-about .about-readout {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .crew-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .start-ways {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .start-way:last-child {
    grid-column: span 2;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .client-row {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    align-items: start;
    gap: 24px;
    padding: 30px 0;
  }

  .page-about .client-row__tag {
    grid-column: 3;
    margin-top: 4px;
  }

  .page-about .tl-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .tl-aside {
    position: sticky;
    top: 24px;
  }

  .page-about .tl-item {
    padding: 24px 26px 26px 52px;
    margin-bottom: 16px;
  }

  .page-about .tl-item::before {
    left: 22px;
    top: 30px;
  }

  .page-about .tl-list::before {
    left: 27px;
  }

  .page-about .crew-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .crew-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .crew-cell--wide {
    grid-column: span 2;
  }

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

  .page-about .check-step {
    padding: 30px 26px 34px;
  }

  .page-about .partners-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .partners-board {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .start-way:last-child {
    grid-column: auto;
  }

  .page-about .start-panel__foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    max-width: 16ch;
  }

  .page-about .crew-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item,
  .page-about .tl-jump__link,
  .page-about .start-way__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
<<<MAIN_HTML_END>>>