.page-about {
  --about-axis: 2.4rem;
  --about-card: rgba(11, 21, 48, 0.9);
  --about-line: rgba(27, 42, 78, 0.72);
}

.page-about .breadcrumb {
  padding-block: clamp(1rem, 3vw, 1.75rem) 0;
}

.page-about .about-head {
  max-width: 48rem;
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-head .section-title {
  margin-top: 0.65rem;
  margin-bottom: 1rem;
}

.page-about .about-head .lede {
  max-width: 40rem;
  color: var(--text-2);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(3rem, 8vw, 5.5rem);
  background:
    radial-gradient(58% 66% at 84% 10%, rgba(25, 227, 208, 0.13), transparent 64%),
    radial-gradient(46% 52% at 6% 92%, rgba(255, 46, 147, 0.09), transparent 68%);
  overflow: hidden;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  align-items: center;
}

.page-about .about-hero__copy h1 {
  margin: 0.65rem 0 1.15rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

.page-about .about-hero__copy .lede {
  max-width: 36rem;
  color: var(--text-2);
  font-size: clamp(1rem, 1.4vw, 1.0625rem);
  line-height: 1.8;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__facts li {
  padding: 0.95rem 0.85rem 0.95rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__num i {
  font-style: normal;
  font-size: 0.62em;
  margin-left: 0.12em;
  color: var(--cyan-soft);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.5rem, 3.5vw, 2rem);
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 11 / 8;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(25, 227, 208, 0.18), rgba(11, 21, 48, 0.92) 46%, rgba(255, 46, 147, 0.14));
}

.page-about .about-hero__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(transparent 50%, rgba(5, 10, 24, 0.32) 50%);
  background-size: 100% 4px;
  opacity: 0.35;
  pointer-events: none;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-jump {
  border-block: 1px solid var(--about-line);
  background: rgba(11, 21, 48, 0.55);
}

.page-about .about-jump__list {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump__list li {
  flex: 0 0 auto;
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.95rem 1.05rem 0.95rem 0;
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.86rem;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--text-1);
  border-bottom-color: var(--cyan);
}

.page-about .about-jump a span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-axis);
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(25, 227, 208, 0.35) 55%, rgba(25, 227, 208, 0.05) 100%);
}

.page-about .tl__item {
  position: relative;
  display: grid;
  gap: 0.55rem;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: calc(0.45rem - var(--about-axis) - 4.5px);
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(25, 227, 208, 0.12);
}

.page-about .tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 1.85rem);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__body {
  padding: clamp(1.05rem, 2.5vw, 1.7rem) clamp(1.05rem, 2.5vw, 1.85rem);
  background: linear-gradient(115deg, rgba(11, 21, 48, 0.92), rgba(11, 21, 48, 0.42) 72%, rgba(11, 21, 48, 0));
  border-top: 1px solid var(--about-line);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .tl__body:hover {
  border-top-color: rgba(25, 227, 208, 0.55);
  transform: translateY(-2px);
}

.page-about .tl__body h3 {
  margin: 0.7rem 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  letter-spacing: -0.01em;
  color: var(--text-1);
}

.page-about .tl__body p {
  margin: 0;
  max-width: 38rem;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 团队分工 ---------- */
.page-about .about-team-section {
  background: linear-gradient(180deg, transparent, rgba(11, 21, 48, 0.7) 22%, rgba(11, 21, 48, 0.7) 78%, transparent);
}

.page-about .team {
  display: grid;
  gap: 1rem;
}

.page-about .team__card {
  padding: clamp(1.25rem, 3vw, 1.85rem) clamp(1.1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--about-line);
  background: var(--glass-soft);
  outline: none;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .team__card:hover,
.page-about .team__card:focus-visible,
.page-about .team__card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(25, 227, 208, 0.5);
  background: var(--glass);
}

.page-about .team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}

.page-about .team__card:first-child .team__num {
  color: var(--orange);
}

.page-about .team__role {
  margin: 0.55rem 0 0.7rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--cyan-soft);
}

.page-about .team__desc {
  margin: 0;
  color: var(--text-2);
  font-size: 0.92rem;
  line-height: 1.78;
}

.page-about .team__duty {
  margin: 1rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--text-3);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  align-items: start;
}

.page-about .about-coverage__copy .section-title {
  margin-top: 0.65rem;
  margin-bottom: 1rem;
}

.page-about .about-coverage__copy > p {
  margin: 0;
  max-width: 34rem;
  color: var(--text-2);
  font-size: 0.97rem;
  line-height: 1.85;
}

.page-about .about-coverage__list {
  margin: clamp(1.5rem, 3.5vw, 2rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-coverage__list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-coverage__list dt {
  font-size: 0.85rem;
  color: var(--text-3);
}

.page-about .about-coverage__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}

.page-about .about-coverage__list dd span {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-coverage__note {
  margin: 1.1rem 0 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--text-3);
}

.page-about .about-coverage__visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 12 / 7;
  border: 1px solid var(--line);
  background: radial-gradient(62% 70% at 50% 45%, rgba(25, 227, 208, 0.16), rgba(7, 14, 30, 0.95) 70%);
}

.page-about .about-coverage__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-coverage__visual figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-2);
  background: linear-gradient(transparent, rgba(5, 10, 24, 0.92));
}

/* ---------- 品质保障 ---------- */
.page-about .about-quality__grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-quality__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .qstat {
  padding: 1.15rem 1rem;
  background: var(--ink-2);
}

.page-about .qstat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .qstat__num i {
  font-style: normal;
  font-size: 0.5em;
  color: var(--text-2);
  margin-left: 0.1em;
}

.page-about .qstat__label {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.page-about .about-quality__sla {
  padding: clamp(1.25rem, 3vw, 1.9rem);
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(255, 122, 47, 0.08), rgba(11, 21, 48, 0.9) 45%);
}

.page-about .about-quality__sla h3 {
  margin: 0 0 1.15rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  color: var(--text-1);
}

.page-about .sla {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .sla__item {
  padding-left: 0.95rem;
  border-left: 1px solid rgba(255, 122, 47, 0.5);
}

.page-about .sla__time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .sla__time span {
  font-size: 1.3rem;
  font-weight: 700;
  margin-right: 0.15em;
}

.page-about .sla__text {
  margin: 0.3rem 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-2);
}

.page-about .about-quality__visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(255, 122, 47, 0.14), rgba(7, 14, 30, 0.94) 55%, rgba(25, 227, 208, 0.12));
}

.page-about .about-quality__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border-block: 1px solid var(--about-line);
}

.page-about .about-partners__num {
  padding: clamp(1.4rem, 3.5vw, 2rem) 1rem;
  background: var(--ink-2);
}

.page-about .about-partners__big {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.4rem, 6.5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__num:first-child .about-partners__big {
  color: var(--magenta);
}

.page-about .about-partners__cap {
  margin: 0.6rem 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-partners__text {
  padding: clamp(1.4rem, 3.5vw, 2rem) 1rem;
  background: var(--ink-2);
}

.page-about .about-partners__text h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-1);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-partners__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-partners__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 5px;
  height: 5px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 下一步 ---------- */
.page-about .about-start {
  padding-bottom: clamp(3rem, 8vw, 5rem);
}

.page-about .about-start__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 90% at 88% 8%, rgba(25, 227, 208, 0.12), transparent 62%),
    linear-gradient(180deg, rgba(11, 21, 48, 0.9), rgba(7, 14, 30, 0.85));
}

.page-about .about-start__copy .section-title {
  margin-top: 0.6rem;
  margin-bottom: 0.9rem;
}

.page-about .about-start__copy .lede {
  max-width: 34rem;
  color: var(--text-2);
}

.page-about .about-start__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid var(--about-line);
}

.page-about .about-start__links li {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-start__links a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.95rem 0;
  color: var(--text-1);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.page-about .about-start__links a:hover,
.page-about .about-start__links a:focus-visible {
  color: var(--cyan);
  padding-left: 0.35rem;
}

.page-about .about-start__links a span {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__facts li {
    padding-right: 1rem;
  }

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

@media (min-width: 820px) {
  .page-about .team {
    grid-template-columns: 0.82fr 1fr 1.18fr;
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 0.7fr 0.7fr 1.6fr;
  }

  .page-about .about-start__inner {
    grid-template-columns: 1.25fr 1fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 10.75rem;
  }

  .page-about .tl__item {
    grid-template-columns: 9rem minmax(0, 1fr);
    column-gap: 3.5rem;
    align-items: start;
  }

  .page-about .tl__item::before {
    left: calc(10.75rem - 4.5px);
    top: 0.9rem;
  }

  .page-about .tl__year {
    text-align: right;
    padding-top: 0.5rem;
    color: var(--text-3);
    font-size: clamp(1.9rem, 2.6vw, 2.5rem);
  }

  .page-about .tl__item:nth-child(2) .tl__body {
    margin-left: 1.75rem;
    max-width: 38rem;
  }

  .page-about .tl__item:nth-child(3) .tl__body {
    max-width: 42rem;
  }

  .page-about .tl__item:nth-child(4) .tl__body {
    margin-left: 0.9rem;
    max-width: 45rem;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: 1fr 1.05fr;
    align-items: center;
  }

  .page-about .about-quality__grid {
    grid-template-columns: 1fr 1.15fr;
    grid-template-areas:
      "stats sla"
      "visual sla";
    align-items: start;
    column-gap: 1.5rem;
  }

  .page-about .about-quality__stats {
    grid-area: stats;
  }

  .page-about .about-quality__sla {
    grid-area: sla;
  }

  .page-about .about-quality__visual {
    grid-area: visual;
    aspect-ratio: 16 / 10;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__facts li {
    padding-right: 1.5rem;
  }

  .page-about .about-quality__grid {
    column-gap: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__body,
  .page-about .team__card,
  .page-about .about-start__links a {
    transition: none;
  }
}
<<<END>>>