.page-about {
  --about-gutter: 20px;
  --about-radius: var(--r-lg);
  background: var(--cream);
  color: var(--seed);
}

.page-about .wrap {
  padding-inline: var(--about-gutter);
}

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

.page-about .about-band--deep {
  background: var(--deep);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 48px;
  background:
    radial-gradient(120% 80% at 88% 0%, rgba(200, 255, 61, 0.28), transparent 62%),
    linear-gradient(180deg, var(--cream) 0%, var(--mint) 140%);
}

.page-about .about-hero__texture {
  position: absolute;
  inset: -20% -10% auto auto;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: repeating-conic-gradient(
    from 0deg,
    rgba(15, 46, 34, 0.16) 0deg 1.2deg,
    transparent 1.2deg 9deg
  );
  opacity: 0.35;
  pointer-events: none;
}

.page-about .crumbs {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--skin);
}

.page-about .crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  border-bottom-color: var(--skin);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 32px;
  margin-bottom: 36px;
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-size: clamp(36px, 8.4vw, 82px);
  line-height: 1.03;
  letter-spacing: 0.01em;
  font-weight: 900;
  color: var(--seed);
}

.page-about .about-hero__lead .lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.85;
  color: var(--line);
}

.page-about .about-hero__pills {
  margin-top: 24px;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__figure img,
.page-about .about-split__figure img,
.page-about .about-line-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 章节索引卡 ---------- */
.page-about .about-index {
  background: var(--deep);
  color: var(--cream);
  border-radius: var(--about-radius);
  padding: 22px 20px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-index__head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--neon);
}

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

.page-about .about-index a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 8px;
  border-radius: 12px;
  color: var(--cream);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: background 220ms var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  background: rgba(200, 255, 61, 0.14);
}

.page-about .about-index__n {
  flex: none;
  font-size: 12px;
  color: var(--neon);
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  display: grid;
  gap: 6px;
  margin-bottom: 28px;
}

.page-about .about-head .sec-num {
  font-family: var(--font-mono);
  font-size: clamp(52px, 13vw, 118px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--pulp);
}

.page-about .about-head .sec-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--skin);
}

.page-about .about-head h2 {
  margin: 4px 0 0;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  font-weight: 800;
}

.page-about .about-band--deep .about-head .sec-num {
  color: var(--neon);
}

.page-about .about-band--deep .about-head .sec-kicker {
  color: var(--mist);
}

.page-about .about-band--deep .about-head h2 {
  color: var(--cream);
}

.page-about .about-body,
.page-about .about-deep-lede {
  max-width: 44em;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-deep-lede {
  color: rgba(248, 245, 236, 0.84);
}

/* ---------- 读者分类 ---------- */
.page-about .about-readers {
  display: grid;
  gap: 14px;
  margin-bottom: 30px;
}

.page-about .about-reader {
  background: var(--cream);
  border-radius: var(--about-radius);
  padding: 22px;
  border: 1px solid rgba(27, 77, 56, 0.16);
}

.page-about .about-reader h3 {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.35;
  font-weight: 700;
}

.page-about .about-reader p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--line);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .about-stat {
  background: var(--cream);
  border-radius: var(--r-md);
  padding: 16px 16px 18px;
  border-top: 4px solid var(--pulp);
}

.page-about .about-stat__n {
  display: block;
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 700;
  color: var(--line);
  letter-spacing: 0.01em;
}

.page-about .about-stat__k {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--skin);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: 0;
  background: var(--deep);
  color: var(--cream);
  border-left: 6px solid var(--neon);
  border-radius: var(--r-md);
  padding: 24px 22px;
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(17px, 2.6vw, 22px);
  line-height: 1.65;
}

/* ---------- 团队 ---------- */
.page-about .about-split {
  display: grid;
  gap: 28px;
}

.page-about .about-split .stack p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--line);
}

.page-about .about-split .stack p:last-child {
  margin-bottom: 0;
}

.page-about .about-split__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--sand);
  box-shadow: var(--shadow-soft);
}

.page-about .about-roles {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-roles li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--mint);
  border-radius: var(--r-pill);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--seed);
}

.page-about .about-roles__n {
  flex: none;
  font-size: 18px;
  font-weight: 700;
  color: var(--skin);
}

/* ---------- 时间线 ---------- */
.page-about .about-line {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-line__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 2px solid rgba(200, 255, 61, 0.32);
}

.page-about .about-line__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-line__year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-about .about-line__dot {
  position: absolute;
  left: -8px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pulp);
  border: 3px solid var(--deep);
  box-shadow: 0 0 0 2px var(--neon);
}

.page-about .about-line__item h3 {
  margin: 6px 0 6px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-line__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(248, 245, 236, 0.78);
}

.page-about .about-line-figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid rgba(200, 255, 61, 0.2);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  border-top: 1px solid rgba(27, 77, 56, 0.3);
  margin-bottom: 28px;
}

.page-about .about-rhythm__row {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(27, 77, 56, 0.2);
  font-size: 15px;
  line-height: 1.75;
  color: var(--line);
}

.page-about .about-rhythm__t {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--skin);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-figure {
  background: var(--sand);
  border-radius: var(--r-md);
  padding: 16px;
}

.page-about .about-figure .mono {
  display: block;
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  color: var(--pulp-deep);
  line-height: 1;
}

.page-about .about-figure p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--line);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 14px;
  margin-bottom: 34px;
}

.page-about .about-partner {
  background: var(--cream);
  border-radius: var(--about-radius);
  padding: 22px;
  border-left: 6px solid var(--pulp);
}

.page-about .about-partner__n {
  display: block;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--skin);
}

.page-about .about-partner__k {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--seed);
}

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

.page-about .about-sub {
  margin: 0 0 16px;
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--seed);
}

.page-about .about-steps {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-steps li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--cream);
  border-radius: var(--r-md);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--seed);
  border-bottom: 2px solid var(--pulp);
}

.page-about .about-steps .mono {
  font-size: 12px;
  color: var(--skin);
}

/* ---------- 荣誉与承诺 ---------- */
.page-about .about-honor {
  background: var(--deep);
  color: var(--cream);
  border-radius: var(--about-radius);
  padding: 26px 22px;
  align-self: start;
  box-shadow: var(--shadow-soft);
}

.page-about .about-honor__k {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--neon);
}

.page-about .about-honor__v {
  margin: 14px 0 10px;
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1.4;
  font-weight: 800;
}

.page-about .about-honor__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(248, 245, 236, 0.76);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

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

/* ---------- 中屏及以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-gutter,
  .page-about .wrap {
    padding-inline: 32px;
  }

  .page-about .about-band {
    padding: 80px 0;
  }

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

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

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

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

  .page-about .about-rhythm__row {
    grid-template-columns: 176px 1fr;
    gap: 24px;
    align-items: baseline;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 34px;
    padding-bottom: 60px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.38fr) minmax(0, 0.82fr);
    gap: 56px;
    align-items: start;
    margin-bottom: 48px;
  }

  .page-about .about-index {
    padding: 26px 22px;
  }

  .page-about .about-head {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 26px;
    align-items: end;
    margin-bottom: 36px;
  }

  .page-about .about-head .sec-num {
    grid-row: 1 / span 2;
    align-self: start;
  }

  .page-about .about-head h2 {
    margin-top: 0;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
  }

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

  .page-about .about-line {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0 18px;
    margin-bottom: 44px;
  }

  .page-about .about-line__item {
    padding: 26px 0 0;
    border-left: 0;
    border-top: 2px solid rgba(200, 255, 61, 0.32);
  }

  .page-about .about-line__item:last-child {
    border-top-color: rgba(200, 255, 61, 0.32);
  }

  .page-about .about-line__dot {
    left: 0;
    top: -8px;
  }

  .page-about .about-line__year {
    font-size: 14px;
  }

  .page-about .about-line__item h3 {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}
<<<PAGE_CSS_END>>>