.page-about {
  --about-line: 1px solid rgba(243, 238, 226, 0.14);
  --about-soft: rgba(243, 238, 226, 0.08);
  --about-gap: clamp(24px, 6vw, 48px);
  background: var(--pitch);
  color: var(--bone);
  overflow-x: clip;
}

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

.page-about .media-frame {
  margin: 0;
  border-radius: 22px 8px 26px 10px;
  overflow: hidden;
  position: relative;
  border: var(--edge);
}

.page-about .media-frame img {
  width: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .media-frame__caption {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
  padding: 10px 14px 12px;
  margin: 0;
  background: var(--rock);
}

.page-about .breadcrumbs {
  padding-top: clamp(14px, 4vw, 26px);
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */

.about-hero {
  padding: clamp(8px, 3vw, 20px) 0 clamp(40px, 9vw, 88px);
}

.about-hero__grid {
  display: grid;
  gap: clamp(28px, 7vw, 56px);
  align-items: center;
}

.about-hero__copy {
  min-width: 0;
}

.about-kicker {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clay);
  margin: 0 0 12px;
}

.about-hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(29px, 7.6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  max-width: 19ch;
  color: var(--bone);
}

.about-hero__lead {
  font-size: clamp(15px, 3.7vw, 18px);
  line-height: 1.78;
  color: var(--bone);
  margin: 0;
  max-width: 34em;
}

.about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: clamp(24px, 6vw, 34px) 0 0;
  padding-top: clamp(18px, 4vw, 24px);
  border-top: var(--about-line);
}

.about-fact {
  min-width: 0;
}

.about-fact__k {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.about-fact__v {
  margin: 6px 0 0;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 4.6vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--bone);
  white-space: nowrap;
}

.about-num {
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.about-visual {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(18px, 5vw, 30px);
  background:
    radial-gradient(circle at 28% 18%, rgba(35, 80, 58, 0.6), rgba(6, 18, 14, 0) 62%),
    var(--pitch-2);
  border: var(--edge);
  border-radius: 34px 10px 42px 14px;
}

.about-visual__svg {
  width: min(100%, 380px);
  height: auto;
  display: block;
}

.av-ring {
  fill: none;
  stroke: rgba(243, 238, 226, 0.16);
  stroke-width: 1;
}

.av-ring--soft {
  stroke: rgba(198, 255, 74, 0.26);
  stroke-dasharray: 4 7;
}

.av-half {
  stroke: var(--lime);
  stroke-width: 1.4;
}

.av-arc {
  fill: none;
  stroke: var(--clay);
  stroke-width: 1.4;
}

.av-ticks line {
  stroke: rgba(243, 238, 226, 0.34);
  stroke-width: 1.6;
}

.av-dot {
  fill: var(--lime);
}

.about-visual__tag {
  position: absolute;
  right: clamp(16px, 5vw, 26px);
  bottom: clamp(12px, 4vw, 20px);
  margin: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */

.about-chapter {
  padding: clamp(44px, 10vw, 104px) 0;
  position: relative;
}

.about-chapter__head {
  max-width: 34em;
}

.about-chapter__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 5.6vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--bone);
}

.about-chapter__intro {
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
  margin: 0;
  max-width: 34em;
}

.about-chapter--bone {
  background: var(--bone);
  color: var(--ink);
}

.about-chapter--bone .about-chapter__title {
  color: var(--ink);
}

.about-chapter--bone .about-chapter__intro {
  color: #4A554D;
}

.about-chapter--bone .about-kicker {
  color: var(--amber-ink);
}

/* ---------- 01 原则 ---------- */

.principles__grid {
  display: grid;
  gap: clamp(28px, 6vw, 44px);
  margin-top: clamp(28px, 6vw, 48px);
}

.principles__grid > * {
  min-width: 0;
}

.principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.principle {
  padding: clamp(18px, 4.5vw, 24px) 0;
  border-top: var(--about-line);
  display: grid;
  gap: 8px;
}

.principle:last-child {
  border-bottom: var(--about-line);
}

.principle__idx {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.principle__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 4.4vw, 22px);
  line-height: 1.35;
  margin: 0;
  color: var(--bone);
}

.principle__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 34em;
}

.principles__figure {
  align-self: start;
}

/* ---------- 02 结构 ---------- */

.structure__grid {
  display: grid;
  gap: clamp(24px, 6vw, 40px);
  margin-top: clamp(26px, 6vw, 44px);
  align-items: start;
}

.structure__grid > * {
  min-width: 0;
}

.teamstack {
  display: grid;
  border: var(--edge);
  border-radius: 28px 10px 32px 12px;
  overflow: hidden;
}

.teamstack__band {
  padding: clamp(18px, 4.6vw, 26px);
}

.teamstack__band--top {
  background: var(--rock);
}

.teamstack__band--mid {
  background: var(--clay);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 11px clamp(18px, 4.6vw, 26px);
}

.teamstack__band--bottom {
  background: var(--moss);
}

.teamstack .label {
  color: var(--lime);
  margin: 0;
}

.teamstack__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(243, 238, 226, 0.88);
  max-width: 34em;
}

.teamstack__band--bottom .label {
  color: var(--bone);
}

/* ---------- 03 薪资结构 ---------- */

.salary {
  margin-top: clamp(26px, 6vw, 44px);
}

.page-about .salary__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
}

.page-about .salary__btn {
  border: var(--edge);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 10px 15px;
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .salary__btn[aria-selected="true"] {
  color: var(--pitch);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .salary__btn:hover,
.page-about .salary__btn:focus-visible {
  border-color: rgba(198, 255, 74, 0.6);
  color: var(--bone);
}

.page-about .salary__btn[aria-selected="true"]:hover,
.page-about .salary__btn[aria-selected="true"]:focus-visible {
  color: var(--pitch);
}

.page-about .salary__panel {
  padding: clamp(20px, 5vw, 30px) 0 0;
  border-top: var(--about-line);
  margin-top: clamp(16px, 4vw, 22px);
}

.salary__range {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 8.5vw, 46px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--bone);
}

.salary__hi {
  color: var(--lime);
}

.salary__dash {
  color: var(--mist);
  font-size: 0.6em;
}

.salary-bar {
  margin: 16px 0 16px;
  height: 12px;
  border-radius: 999px;
  background: var(--about-soft);
  overflow: hidden;
}

.salary-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.salary-bar__fill--gk {
  width: 8%;
  background: var(--blue);
}

.salary-bar__fill--df {
  width: 26%;
  background: var(--lime);
}

.salary-bar__fill--mf {
  width: 32%;
  background: var(--amber);
}

.salary-bar__fill--fw {
  width: 34%;
  background: var(--magenta);
}

.salary__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 34em;
}

/* ---------- 04 团队 ---------- */

.crew__grid {
  display: grid;
  gap: clamp(28px, 6vw, 48px);
  margin-top: clamp(26px, 6vw, 44px);
}

.crew__grid > * {
  min-width: 0;
}

.crew__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 14px;
}

.crew__stat {
  padding: 18px 16px;
  background: var(--rock);
  border: var(--edge);
  border-radius: 20px 6px 22px 8px;
}

.crew__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 7vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.crew__stat--a .crew__num {
  color: var(--lime);
}

.crew__stat--b .crew__num {
  color: var(--blue);
}

.crew__stat--c .crew__num {
  color: var(--amber);
}

.crew__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.crew__list {
  margin-top: clamp(22px, 5vw, 32px);
}

/* ---------- 可展开内容组 ---------- */

.page-about .disclosure {
  border-top: var(--about-line);
}

.page-about .disclosure:last-child {
  border-bottom: var(--about-line);
}

.page-about .disclosure__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: clamp(16px, 4vw, 20px) 0;
  background: none;
  border: 0;
  color: inherit;
  font-family: var(--font-head);
  font-size: clamp(16px, 4.1vw, 18px);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
  transition: color var(--t) var(--ease);
}

.page-about .disclosure__btn:hover,
.page-about .disclosure__btn:focus-visible {
  color: var(--lime);
}

.page-about .disclosure__panel {
  padding-bottom: clamp(16px, 4vw, 22px);
}

.page-about .disclosure__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 34em;
}

.about-sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  align-self: center;
}

.about-sign::before,
.about-sign::after {
  content: "";
  position: absolute;
  background: var(--lime);
  border-radius: 2px;
}

.about-sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.about-sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}

[aria-expanded="true"] .about-sign::after {
  transform: scaleY(0);
  opacity: 0;
}

/* ---------- 05 版本时间轴 ---------- */

.vtl {
  list-style: none;
  margin: clamp(28px, 6vw, 48px) 0 0;
  padding: 0 0 0 34px;
  position: relative;
}

.vtl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: rgba(243, 238, 226, 0.16);
}

.vtl__item {
  position: relative;
}

.vtl__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 22px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(183, 106, 69, 0.2);
}

.vtl__meta {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .vtl__ver {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-about .vtl__name {
  font-family: var(--font-head);
  font-size: clamp(16px, 4.2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
}

/* ---------- 06 审校 ---------- */

.flow {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 5vw, 34px) 0 0;
  padding: 0;
}

.flow__step {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid rgba(10, 15, 12, 0.18);
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.flow__num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber-ink);
}

.review__cols {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 5vw, 36px);
}

.review__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: #3B443D;
  max-width: 34em;
}

/* ---------- 07 备案 ---------- */

.record {
  display: grid;
  gap: 0;
  margin: clamp(26px, 6vw, 40px) 0 0;
}

.record__row {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 3.6vw, 18px) 0;
  border-top: var(--about-line);
}

.record__row:last-child {
  border-bottom: var(--about-line);
}

.record__row dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.record__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--bone);
  overflow-wrap: anywhere;
}

.nextlinks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 5vw, 36px) 0 0;
  padding: 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .principles__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .strueck-fix,
  .structure__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .review__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .record__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 980px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .about-visual {
    justify-self: end;
    width: 100%;
    max-width: 460px;
  }

  .crew__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .vtl {
    padding-left: 42px;
  }

  .vtl::before {
    left: 11px;
  }

  .vtl__item::before {
    left: -37px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .salary__btn,
  .page-about .disclosure__btn,
  .about-sign::after {
    transition: none;
  }
}
<<<END>>>
```