.page-about {
  --about-line: rgba(93, 187, 63, .42);
  --about-line-soft: rgba(16, 22, 15, .14);
  --about-pad: 26px;
  position: relative;
  background: var(--canvas);
  color: var(--ink-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 44px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(93, 187, 63, .16) 0%, rgba(93, 187, 63, 0) 58%),
    linear-gradient(180deg, var(--paper) 0%, var(--canvas) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 22px;
}

.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--rock);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-size: clamp(2.05rem, 6.4vw, 4.1rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--seed);
  max-width: 15ch;
  margin: 0 0 22px;
}

.page-about .about-hero__lead {
  max-width: 40ch;
  margin: 0;
}

.page-about .about-facts {
  list-style: none;
  margin: 38px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-fact__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--seed);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__unit {
  font-size: 12px;
  font-weight: 600;
  color: var(--grass-deep);
}

.page-about .about-fact__label {
  font-size: 13px;
  color: var(--rock);
  line-height: 1.5;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 8px;
  padding-bottom: 0;
}

.page-about .about-stream {
  position: relative;
  padding-left: var(--about-pad);
}

.page-about .about-stream::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 26px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(180deg, var(--about-line) 0%, var(--about-line-soft) 62%, rgba(16, 22, 15, 0) 100%);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  position: relative;
  padding: 40px 0 48px;
}

.page-about .chapter::before {
  content: "";
  position: absolute;
  left: 0;
  top: 46px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--kiwi);
  box-shadow: 0 0 0 4px rgba(93, 187, 63, .16);
}

.page-about .chapter__index {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--rock);
  margin: 0 0 10px;
}

.page-about .chapter .section__title {
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--seed);
  margin: 0 0 16px;
  max-width: 20ch;
}

.page-about .chapter .section__desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 38ch;
  margin: 0 0 26px;
}

.page-about .chapter__figure {
  margin: 30px 0 0;
}

.page-about .chapter__cta {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40ch;
}

.page-about .chapter__cta a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 107, 224, .35);
}

.page-about .chapter__cta a:hover {
  border-bottom-color: var(--blue);
}

/* 深色规模章节 */
.page-about .chapter--dark {
  margin-top: 8px;
  padding: 34px 24px 36px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--seed) 0%, #16221A 54%, var(--grass-deep) 100%);
  color: rgba(244, 241, 232, .82);
  box-shadow: var(--shadow-glass);
}

.page-about .chapter--dark::before {
  background: var(--pulse);
  box-shadow: 0 0 0 4px rgba(182, 255, 60, .2);
}

.page-about .chapter--dark .chapter__index {
  color: rgba(182, 255, 60, .8);
}

.page-about .chapter--dark .section__title {
  color: var(--paper);
}

.page-about .chapter--dark .section__desc {
  color: rgba(244, 241, 232, .74);
}

/* ---------- 筛选条 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.page-about .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.page-about .filter-btn:hover {
  border-color: var(--kiwi);
  color: var(--seed);
}

.page-about .filter-btn.is-active {
  background: var(--seed);
  border-color: var(--seed);
  color: var(--pulse);
}

.page-about .filter-btn:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 2px;
}

/* ---------- 团队角色 ---------- */
.page-about .role-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .role-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .role-item__head {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 0 8px;
  flex-wrap: wrap;
}

.page-about .role-item__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--grass-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .role-item__unit {
  font-size: 12px;
  color: var(--rock);
  margin-right: 8px;
}

.page-about .role-item__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--seed);
}

.page-about .role-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40ch;
}

.page-about .role-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
}

/* ---------- 流程步骤 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  counter-reset: flow;
}

.page-about .flow__step {
  padding: 18px 0 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .flow__no {
  display: block;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--kiwi);
  margin-bottom: 6px;
}

.page-about .flow__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--seed);
  margin: 0 0 8px;
}

.page-about .flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40ch;
}

/* ---------- 发展时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .timeline__item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .timeline__season {
  display: block;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--clay);
  margin: 0 0 8px;
}

.page-about .timeline__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--seed);
  margin: 0 0 8px;
  line-height: 1.45;
}

.page-about .timeline__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42ch;
}

/* ---------- 规模数字 ---------- */
.page-about .scale-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 16px;
}

.page-about .scale-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 14px;
  border-top: 1px solid rgba(244, 241, 232, .2);
}

.page-about .scale-item__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 7vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--pulse);
  font-variant-numeric: tabular-nums;
}

.page-about .scale-item__unit {
  font-size: 12px;
  color: rgba(244, 241, 232, .6);
  margin-top: 2px;
}

.page-about .scale-item__label {
  font-size: 13px;
  color: rgba(244, 241, 232, .72);
  margin-top: 6px;
}

.page-about .scale-note {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 232, .74);
  max-width: 42ch;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .partner-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .partner-item__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 0 6px;
}

.page-about .partner-item__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}

.page-about .partner-item__unit {
  font-size: 12px;
  color: var(--rock);
}

.page-about .partner-item__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--seed);
  margin: 0 0 8px;
}

.page-about .partner-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42ch;
}

/* ---------- 纠错与服务 ---------- */
.page-about .support-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .support-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .support-item__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--seed);
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .support-item__title::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clay);
  flex: none;
}

.page-about .support-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42ch;
}

.page-about .contact-block {
  padding: 22px 20px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(31, 110, 74, .1) 0%, rgba(93, 187, 63, .07) 100%);
  border: 1px solid rgba(31, 110, 74, .2);
}

.page-about .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .contact-list__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .contact-list__k {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--grass-deep);
  flex: none;
}

.page-about .contact-list__v {
  font-size: 15px;
  color: var(--seed);
  word-break: break-word;
}

.page-about .contact-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(31, 110, 74, .18);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .contact-note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 107, 224, .35);
}

/* ---------- 右侧锚点 ---------- */
.page-about .about-anchor {
  display: none;
}

/* ---------- 结尾草皮带 ---------- */
.page-about .about-close {
  position: relative;
  margin-top: 24px;
  background: linear-gradient(160deg, var(--grass-deep) 0%, #1A5C3E 46%, var(--seed) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-close__media {
  position: relative;
  height: 150px;
  overflow: hidden;
  border-bottom: 1px solid rgba(244, 241, 232, .2);
}

.page-about .about-close__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .5;
}

.page-about .about-close__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 22, 15, .35) 0%, rgba(31, 110, 74, .1) 100%);
}

.page-about .about-close__body {
  padding-top: 34px;
  padding-bottom: 44px;
}

.page-about .about-close__title {
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0 0 14px;
  max-width: 22ch;
}

.page-about .about-close__desc {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 232, .78);
  max-width: 40ch;
}

.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-close__links .btn--ghost {
  color: var(--paper);
  border-color: rgba(244, 241, 232, .4);
}

.page-about .about-close__links .btn--ghost:hover {
  border-color: var(--pulse);
  color: var(--pulse);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 40px 0 60px;
  }

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

  .page-about .about-fact + .about-fact {
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }

  .page-about .about-stream {
    padding-left: 38px;
  }

  .page-about .about-stream::before {
    left: 6px;
  }

  .page-about .chapter {
    padding: 54px 0 60px;
  }

  .page-about .chapter::before {
    width: 11px;
    height: 11px;
    top: 60px;
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 30px;
  }

  .page-about .scale-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 20px;
  }

  .page-about .chapter--dark {
    padding: 42px 36px 44px;
  }

  .page-about .about-close__media {
    height: 220px;
  }

  .page-about .about-close__body {
    padding-top: 40px;
    padding-bottom: 56px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 176px;
    gap: 0 52px;
  }

  .page-about .about-anchor {
    display: block;
    position: sticky;
    top: calc(var(--top-h) + 28px);
    align-self: start;
    padding-top: 54px;
  }

  .page-about .anchor-nav__title {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--rock);
    margin: 0 0 12px;
  }

  .page-about .anchor-nav__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
  }

  .page-about .anchor-nav__link {
    display: block;
    padding: 7px 10px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--rock);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color .18s ease, border-color .18s ease, background .18s ease;
  }

  .page-about .anchor-nav__link:hover {
    color: var(--seed);
    border-left-color: var(--line);
  }

  .page-about .anchor-nav__link.is-active {
    color: var(--grass-deep);
    font-weight: 600;
    border-left-color: var(--kiwi);
    background: rgba(93, 187, 63, .08);
  }
}

@media (min-width: 1320px) {
  .page-about .about-hero__title {
    max-width: 17ch;
  }

  .page-about .chapter .section__desc {
    max-width: 44ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
  }
}
<<<END>>>