.page-about {
  --about-ink-soft: rgba(28, 26, 24, .78);
  --about-ink-dim: rgba(28, 26, 24, .66);
  background: var(--mother);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
  padding-bottom: 92px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 112px 0 46px;
  overflow: hidden;
}

.page-about .about-hero__wash {
  position: absolute;
  top: -30%;
  right: -36%;
  width: 88%;
  height: 152%;
  background: var(--grad-tide);
  opacity: .11;
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 64%);
  pointer-events: none;
}

.page-about .about-hero__wick {
  position: absolute;
  top: 0;
  left: 0;
  width: min(190px, 44%);
  height: 5px;
  background: var(--grad-wick);
}

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

.page-about .about-hero h1 {
  margin: 12px 0 14px;
  max-width: 20ch;
  font-size: clamp(30px, 7.6vw, 52px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-about .about-hero .lede {
  max-width: 60ch;
  margin: 0;
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-ink-soft);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 16px;
  background: var(--paper);
}

.page-about .about-facts__num {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--deep);
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-ink-dim);
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-section {
  padding: 50px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section--tide {
  background: linear-gradient(180deg, rgba(30, 91, 143, .055), rgba(46, 158, 143, .05));
}

.page-about .about-narrow {
  max-width: 70ch;
}

.page-about .about-sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-sec-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--celadon);
}

.page-about .about-section > .shell > .about-narrow p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-section > .shell > .about-narrow p:last-child {
  margin-bottom: 0;
}

.page-about .about-section p a,
.page-about .about-more a {
  color: var(--tide);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(255, 107, 61, .62);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-section p a:hover,
.page-about .about-more a:hover {
  color: var(--coral-deep);
}

.page-about .about-more {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team__top {
  display: grid;
  gap: 20px;
  margin-bottom: 20px;
}

.page-about .about-team__figure {
  margin: 0;
  overflow: hidden;
  background: var(--deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

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

.page-about .about-team__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-team {
  display: grid;
  gap: 14px;
}

.page-about .team-col {
  padding: 22px 22px 24px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-size)), calc(100% - var(--cut-size)) 100%, 0 100%);
  transition: transform .18s ease;
}

.page-about .team-col--edit {
  background: var(--paper);
  border-top: 4px solid var(--coral);
}

.page-about .team-col--tech {
  background: var(--deep);
  border-top: 4px solid var(--celadon);
  color: var(--on-deep);
}

.page-about .team-col--care {
  background: var(--celadon-light);
  border-top: 4px solid var(--tide);
  color: var(--deep);
}

.page-about .team-col:hover,
.page-about .team-col:focus-within {
  transform: translateY(-4px);
}

.page-about .team-col__num {
  display: block;
  margin-bottom: 10px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
}

.page-about .team-col--edit .team-col__num {
  color: var(--coral-deep);
}

.page-about .team-col--tech .team-col__num {
  color: var(--celadon-light);
}

.page-about .team-col--care .team-col__num {
  color: var(--tide);
}

.page-about .team-col__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .team-col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
}

.page-about .team-col--edit p {
  color: var(--about-ink-soft);
}

.page-about .team-col--tech p {
  color: var(--on-deep);
}

.page-about .team-col--care p {
  color: rgba(11, 42, 74, .86);
}

/* ---------- 时间线 ---------- */
.page-about .about-upgrade-figure {
  margin: 0 0 28px;
  overflow: hidden;
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-upgrade-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--coral), var(--celadon));
  opacity: .55;
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 22px;
  height: 22px;
  background: var(--coral);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  transition: background-color .18s ease;
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--coral-deep);
}

.page-about .tl-year {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--tide);
}

.page-about .tl-card {
  position: relative;
  padding: 18px 22px;
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-size)), calc(100% - var(--cut-size)) 100%, 0 100%);
  transition: transform .18s ease, background-color .18s ease;
}

.page-about .tl-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--coral);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .18s ease;
}

.page-about .tl-item:hover .tl-card,
.page-about .tl-item:focus-within .tl-card {
  transform: translateY(-3px);
  background: var(--paper);
}

.page-about .tl-item:hover .tl-card::after,
.page-about .tl-item:focus-within .tl-card::after {
  transform: scaleY(1);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-about .tl-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--about-ink-soft);
}

/* ---------- 服务范围 ---------- */
.page-about .about-range {
  padding: 6px 0 52px;
}

.page-about .about-range__card {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-range__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .36;
}

.page-about .about-range__body {
  position: relative;
  padding: 38px 22px 44px;
  color: var(--on-deep);
}

.page-about .about-range__body .about-sec-num {
  color: var(--celadon-light);
}

.page-about .about-range__body .section-title {
  color: var(--mother);
}

.page-about .about-range__body > p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--on-deep);
}

.page-about .about-range__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-range__stats li {
  padding-top: 11px;
  border-top: 1px solid rgba(244, 241, 232, .26);
}

.page-about .about-range__stats strong {
  display: block;
  margin-bottom: 4px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--celadon-light);
}

.page-about .about-range__stats span {
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-deep-dim);
}

.page-about .about-range__note {
  margin-top: 24px;
  padding-left: 14px;
  border-left: 3px solid var(--coral);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--on-deep);
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 14px 18px;
  background: var(--paper);
}

.page-about .about-contact__key {
  min-width: 74px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--celadon);
}

.page-about .about-contact__val {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  word-break: break-word;
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about {
    padding-bottom: 40px;
  }

  .page-about .about-hero {
    padding: 138px 0 66px;
  }

  .page-about .about-hero .lede {
    font-size: 17px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 38px;
  }

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

  .page-about .about-range {
    padding: 10px 0 76px;
  }

  .page-about .about-range__body {
    padding: 54px 46px 58px;
  }

  .page-about .about-range__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-upgrade-figure {
    margin-bottom: 36px;
  }

  .page-about .tl-card {
    padding: 20px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__top {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 34px;
    margin-bottom: 26px;
  }

  .page-about .about-team {
    grid-template-columns: 5fr 3fr 4fr;
  }

  .page-about .about-timeline {
    padding-left: 40px;
    gap: 22px;
  }

  .page-about .about-timeline::before {
    left: 11px;
  }

  .page-about .tl-item::before {
    left: -40px;
    top: 6px;
  }

  .page-about .tl-year {
    font-size: 26px;
  }
}
<<<END>>>