.page-about {
  --about-hair: rgba(183, 196, 180, 0.16);
  --about-hair-green: rgba(76, 175, 80, 0.32);
  --about-pad: clamp(20px, 3.4vw, 40px);
  background:
    radial-gradient(118% 58% at 86% -8%, rgba(76, 175, 80, 0.18), transparent 62%),
    var(--night);
  color: var(--bone);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-block: clamp(18px, 3vw, 30px) clamp(4px, 1vw, 10px);
}

/* ---------- 首屏 ---------- */

.page-about .about-intro {
  padding-block: clamp(18px, 3vw, 34px) clamp(56px, 8vw, 104px);
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 60px);
  align-items: end;
}

.page-about .about-intro__title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(38px, 8vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.04em;
  margin: clamp(14px, 2vw, 22px) 0 clamp(16px, 2.4vw, 26px);
  max-width: min(660px, 100%);
  text-wrap: balance;
}

.page-about .about-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-intro__figure {
  margin: 0;
  position: relative;
}

.page-about .about-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), calc(100% - 48px) 100%, 0 100%);
  border: 1px solid var(--about-hair-green);
}

.page-about .about-intro__figure figcaption {
  margin-top: 12px;
  color: var(--mist);
}

/* ---------- 通用小节标题行 ---------- */

.page-about .about-head {
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .about-head .section__title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(26px, 4.2vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  max-width: 22ch;
}

/* ---------- 四级档案 ---------- */

.page-about .about-tiers__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-about .about-tiers__figure {
  margin: 0;
  max-width: 460px;
}

.page-about .about-tiers__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.08);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 40px 100%, 0 calc(100% - 40px));
}

.page-about .about-tiers__copy .prose + .prose {
  margin-top: 14px;
}

.page-about .about-tiers__copy .prose {
  color: var(--bone);
  opacity: 0.88;
}

.page-about .about-tiers__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: tier;
}

.page-about .tier-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid var(--about-hair);
  position: relative;
}

.page-about .tier-row:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .tier-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 0;
  height: 2px;
  background: var(--kiwi);
  transition: width 0.4s ease;
}

.page-about .tier-row:hover::before,
.page-about .tier-row:focus-within::before {
  width: clamp(48px, 12vw, 128px);
}

.page-about .tier-row__code {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5.5vw, 40px);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--kiwi);
  line-height: 1;
}

.page-about .tier-row__name {
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-about .tier-row__body p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
  max-width: 62ch;
}

.page-about .tier-row__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(18px, 3vw, 30px);
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--lemon) 0%, var(--kiwi) 34%, rgba(76, 175, 80, 0.05) 100%);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 3vw, 30px) + 1px);
  top: clamp(24px, 3vw, 32px);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--lemon);
  box-shadow: 0 0 0 4px rgba(230, 255, 59, 0.12);
}

.page-about .tl-item__box {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .tl-item__head {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 14px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-item__head::-webkit-details-marker {
  display: none;
}

.page-about .tl-item__stamp {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--lemon);
}

.page-about .tl-item__label {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(19px, 3vw, 30px);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-about .tl-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  justify-self: end;
}

.page-about .tl-item__sign::before,
.page-about .tl-item__sign::after {
  content: "";
  position: absolute;
  background: var(--kiwi);
  transition: transform 0.32s ease;
}

.page-about .tl-item__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .tl-item__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-about .tl-item__box[open] .tl-item__sign::after {
  transform: scaleY(0);
}

.page-about .tl-item__body {
  padding: 0 clamp(18px, 3vw, 30px) clamp(20px, 2.8vw, 28px) 0;
}

.page-about .tl-item__body p {
  margin: 0;
  max-width: 66ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .tl-item__label,
.page-about .tl-item__head:hover .tl-item__label {
  transition: color 0.24s ease;
}

.page-about .tl-item__head:hover .tl-item__label {
  color: var(--turf);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-team__panels {
  display: grid;
  gap: 16px;
}

.page-about .team-panel {
  position: relative;
  background: var(--steel);
  border-left: 2px solid var(--kiwi);
  padding: clamp(20px, 3vw, 30px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .team-panel .micro {
  color: var(--turf);
}

.page-about .team-panel__name {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(20px, 3.2vw, 28px);
  letter-spacing: -0.02em;
  margin: 8px 0 10px;
}

.page-about .team-panel p:last-child {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
  max-width: 58ch;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0);
}

.page-about .about-team__figure figcaption {
  margin-top: 12px;
  color: var(--mist);
}

/* ---------- 服务对象 ---------- */

.page-about .about-scenes__grid {
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-scene {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-scene__name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .about-scene p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-scenes__foot {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--about-hair-green);
  color: var(--bone);
  font-size: 15px;
  line-height: 1.8;
  max-width: 68ch;
}

/* ---------- 为什么选我们 ---------- */

.page-about .about-why__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.6vw, 30px);
  margin-bottom: clamp(30px, 4.5vw, 54px);
}

.page-about .about-why__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 28px) 0 clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-why__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--lemon);
}

.page-about .about-why__unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--kiwi);
}

.page-about .about-why__cap {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-ruling {
  padding: clamp(20px, 3vw, 32px) clamp(20px, 3vw, 36px);
}

.page-about .about-ruling .micro {
  color: var(--clay);
  margin: 0 0 10px;
}

.page-about .about-ruling__text {
  margin: 0;
  font-size: clamp(18px, 2.8vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.45;
  max-width: 46ch;
}

.page-about .about-why__note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
  max-width: 64ch;
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--about-hair-green);
}

.page-about .about-cta__inner {
  max-width: 760px;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-tiers__list {
    margin-top: 8px;
  }

  .page-about .tier-row {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 190px);
    gap: 14px 32px;
    align-items: start;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

  .page-about .about-tiers__top {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    align-items: start;
  }

  .page-about .about-team__panels {
    gap: 20px;
  }

  .page-about .about-team__panels .team-panel:nth-child(2) {
    margin-left: clamp(18px, 3vw, 44px);
  }

  .page-about .about-team__panels .team-panel:nth-child(3) {
    margin-right: clamp(14px, 2.4vw, 34px);
  }

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

  .page-about .about-scene:nth-child(even) {
    transform: translateY(22px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tier-row::before,
  .page-about .tl-item__label,
  .page-about .tl-item__sign::before,
  .page-about .tl-item__sign::after {
    transition: none;
  }

  .page-about .about-scene:nth-child(even) {
    transform: none;
  }
}
<<<END>>>