.page-about {
  --about-line: rgba(16, 22, 15, .16);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 4vw, 48px) 0 clamp(36px, 5vw, 64px);
  background:
    radial-gradient(circle at 86% 18%, rgba(183, 226, 122, .5), transparent 42%),
    radial-gradient(circle at 8% 92%, rgba(255, 211, 75, .28), transparent 38%),
    var(--paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: var(--ink);
  opacity: .18;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  display: flex;
  flex-direction: column;
  gap: .05em;
  font-size: clamp(38px, 7.2vw, 92px);
  line-height: .98;
  letter-spacing: -.035em;
  font-weight: 300;
}

.page-about .about-hero__thin {
  font-weight: 300;
  color: var(--ink);
}

.page-about .about-hero__title strong {
  font-weight: 900;
  color: var(--leaf);
  letter-spacing: -.045em;
}

.page-about .about-hero .lead {
  margin-top: clamp(20px, 2.6vw, 30px);
  max-width: 34em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: rgba(16, 22, 15, .84);
}

/* 奇异果切面图形 */
.page-about .about-hero__fruit {
  position: relative;
  width: min(260px, 60vw);
  aspect-ratio: 1;
  margin-inline: auto;
}

.page-about .kiwi-ring--outer {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, var(--sprout) 0 40%, var(--flesh) 40% 76%, transparent 76%);
  opacity: .95;
}

.page-about .kiwi-ring--inner {
  position: absolute;
  inset: 33%;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ink);
}

.page-about .kiwi-seeds {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background-image: radial-gradient(circle, var(--ink) 0 2.4px, transparent 3px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(circle, transparent 0 46%, #000 47% 74%, transparent 75%);
  mask-image: radial-gradient(circle, transparent 0 46%, #000 47% 74%, transparent 75%);
  opacity: .8;
}

/* 首屏数据条 */
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 4vw, 50px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--about-line);
  background: var(--about-line);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--paper);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--leaf);
}

.page-about .about-hero__lab {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(16, 22, 15, .66);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(36px, 5vw, 72px);
}

/* 章节索引 */
.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
  transition: background-color .18s ease, border-color .18s ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  background: var(--sprout);
  border-color: var(--ink);
}

.page-about .about-rail__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.page-about .about-rail__txt {
  font-size: 13px;
  font-weight: 700;
}

.page-about .about-rail__dash {
  display: none;
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  position: relative;
  padding-block: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--about-line);
}

.page-about .chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .chapter__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--flesh);
  font-weight: 700;
}

.page-about .chapter h2 {
  margin: 0 0 clamp(16px, 2vw, 22px);
  font-size: clamp(25px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.2;
  max-width: 22ch;
}

.page-about .chapter h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .chapter p {
  margin: 0 0 1.1em;
  font-size: clamp(16px, 1.35vw, 17.5px);
  line-height: 1.8;
  color: rgba(16, 22, 15, .86);
  max-width: 38em;
}

.page-about .chapter__lede {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .chapter__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

.page-about .chapter__text > p:last-child {
  margin-bottom: 0;
}

.page-about .chapter a {
  color: var(--leaf);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  text-decoration-color: var(--violet);
}

.page-about .chapter a:hover {
  color: var(--violet);
}

/* 引文标签纸 */
.page-about .paper-note {
  margin: 22px 0 0;
  padding: 20px 22px;
  max-width: 30em;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--ink);
  border: 1px solid var(--ink);
  background-image: linear-gradient(315deg, var(--paper) 0 22px, var(--yellow) 22px);
  box-shadow: var(--shadow-paper-sm);
}

/* 图 */
.page-about .figure {
  margin: 0;
}

.page-about .figure__frame {
  border: 1px solid var(--ink);
  background: var(--mist);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

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

.page-about .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 1.6;
  color: rgba(16, 22, 15, .62);
}

.page-about .chapter__wide {
  margin-top: clamp(24px, 3vw, 36px);
}

/* 三阶段卡片 */
.page-about .stages {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .stage {
  padding: 18px 18px 20px;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-paper-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}

.page-about .stage:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-paper);
}

.page-about .stage--a {
  background: var(--mist);
}

.page-about .stage--b {
  background: var(--sprout);
}

.page-about .stage--c {
  background: var(--leaf);
  color: var(--paper);
}

.page-about .stage--c p {
  color: rgba(245, 241, 230, .88);
}

.page-about .stage__year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
}

.page-about .stage p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.72;
}

/* 流程步骤 */
.page-about .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  padding-top: 14px;
  border-top: 3px solid var(--leaf);
}

.page-about .flow__step:nth-child(1) {
  border-top-color: var(--flesh);
}

.page-about .flow__step:nth-child(2) {
  border-top-color: var(--orange);
}

.page-about .flow__step:nth-child(3) {
  border-top-color: var(--violet);
}

.page-about .flow__no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  font-weight: 700;
  color: rgba(16, 22, 15, .6);
}

.page-about .flow__step p {
  font-size: 15px;
  line-height: 1.72;
  margin-bottom: 0;
}

/* 深色数据块 */
.page-about .panel-note {
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(22px, 3vw, 34px);
  background: var(--leaf);
  color: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow-paper);
}

.page-about .panel-note__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--sprout);
}

.page-about .panel-note__big {
  margin: 0;
  font-size: clamp(48px, 8vw, 84px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--sprout);
}

.page-about .panel-note__txt {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(245, 241, 230, .9);
}

/* 合作标签 */
.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-about .partner-tags .tag {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 3px 3px 0 -1px rgba(16, 22, 15, .2);
}

.page-about .partner-tags .tag--green {
  background: var(--sprout);
}

.page-about .partner-tags .tag--orange {
  background: var(--orange);
}

/* 主张列表 */
.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .principles__item {
  padding: 18px 18px 20px;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-paper-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}

.page-about .principles__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-paper);
}

.page-about .principles__no {
  margin: 0 0 8px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--flesh);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-about .principles__item p:last-child {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 结尾行动区 */
.page-about .about-cta {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--ink);
  background: linear-gradient(135deg, var(--sprout) 0%, var(--yellow) 100%);
  box-shadow: var(--shadow-paper);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  letter-spacing: -.025em;
  line-height: 1.22;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(16, 22, 15, .86);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

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

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .chapter__cols {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .chapter__cols--flip {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  }

  .page-about .stages {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .stage:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .stage:nth-child(2):hover {
    transform: translateY(10px);
  }

  .page-about .chapter--offset {
    margin-left: clamp(0px, 3vw, 48px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 116px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__list a {
    border: 0;
    border-bottom: 1px solid var(--about-line);
    border-radius: 0;
    padding: 9px 8px 9px 0;
    gap: 6px;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    background: transparent;
    border-bottom-color: var(--ink);
  }

  .page-about .about-rail__list a:hover .about-rail__txt,
  .page-about .about-rail__list a:focus-visible .about-rail__txt {
    background: var(--sprout);
  }

  .page-about .about-rail__dash {
    display: block;
    flex: 1 1 auto;
    min-width: 8px;
    height: 1px;
    background: var(--about-line);
  }

  .page-about .about-rail__txt {
    padding: 1px 4px;
  }
}

@media (min-width: 1100px) {
  .page-about .chapter:nth-child(even) {
    margin-left: clamp(0px, 2.4vw, 40px);
  }

  .page-about .chapter:nth-child(odd) {
    margin-right: clamp(0px, 2.4vw, 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stage,
  .page-about .principles__item,
  .page-about .about-rail__list a {
    transition: none;
  }

  .page-about .stage:hover,
  .page-about .principles__item:hover {
    transform: none;
  }

  .page-about .stage:nth-child(2),
  .page-about .stage:nth-child(2):hover {
    transform: none;
  }
}
<<<END>>>