.page-about {
  --about-num-ink: rgba(11, 61, 46, 0.07);
  --about-hair: rgba(11, 61, 46, 0.14);
  --about-cyan-soft: rgba(77, 255, 195, 0.16);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 0;
  background:
    radial-gradient(120% 90% at 82% -10%, #12543e 0%, var(--ink) 46%, var(--ink-deep) 100%);
  color: var(--white);
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-bottom: 56px;
}

.page-about .about-hero__crumb {
  color: var(--mist);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-hero__crumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero__eyebrow {
  margin: 22px 0 14px;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 26px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 18em;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(253, 251, 244, 0.82);
  border-left: 2px solid var(--orange);
  padding-left: 18px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid rgba(159, 184, 174, 0.28);
}

.page-about .about-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-size: 14px;
  color: rgba(253, 251, 244, 0.78);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
  margin-right: 4px;
}

.page-about .about-hero__wave {
  position: absolute;
  right: -60px;
  bottom: -30px;
  width: min(720px, 130%);
  height: auto;
  color: rgba(77, 255, 195, 0.22);
  pointer-events: none;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: 64px 0;
}

.page-about .about-chapter__head {
  position: relative;
  margin-bottom: 34px;
  padding-top: 26px;
}

.page-about .about-chapter__num {
  position: absolute;
  top: -18px;
  right: 0;
  font-family: var(--font-mono);
  font-size: clamp(76px, 18vw, 120px);
  line-height: 1;
  font-weight: 700;
  color: var(--about-num-ink);
  letter-spacing: -0.04em;
  pointer-events: none;
  user-select: none;
}

.page-about .about-chapter__head .eh-eyebrow {
  display: block;
  margin: 0 0 12px;
  color: var(--mid);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 20em;
}

.page-about .about-chapter__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 61, 46, 0.72);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-origin__text p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(11, 61, 46, 0.86);
  max-width: 42em;
}

.page-about .about-origin__fig {
  margin: 26px 0 0;
}

.page-about .about-origin__fig .eh-media {
  border: 1px solid var(--about-hair);
  background: var(--paper-2);
}

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

.page-about .about-origin__fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(11, 61, 46, 0.55);
}

.page-about .about-origin__marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-origin__marks li {
  padding: 16px 18px;
  background: var(--paper-2);
  border-left: 3px solid var(--cyan);
}

.page-about .about-origin__marks-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.page-about .about-origin__marks-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(11, 61, 46, 0.74);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, rgba(228, 220, 200, 0.5) 0%, rgba(244, 239, 227, 0) 70%);
}

.page-about .about-timeline__wrap {
  display: grid;
  gap: 32px;
}

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

.page-about .about-timeline__fig .eh-media {
  border: 1px solid var(--about-hair);
  background: var(--ink);
}

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

.page-about .about-timeline__fig figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(11, 61, 46, 0.6);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 32px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--mist);
}

.page-about .about-tl {
  position: relative;
  margin-bottom: 8px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--about-cyan-soft);
  z-index: 1;
}

.page-about .about-tl__box {
  border: 1px solid var(--about-hair);
  background: rgba(253, 251, 244, 0.72);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-tl__box[open] {
  border-color: rgba(11, 61, 46, 0.4);
  background: var(--white);
}

.page-about .about-tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-about .about-tl__sum:focus-visible {
  outline: 2px solid var(--mid);
  outline-offset: 2px;
}

.page-about .about-tl__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mid);
  transition: transform 180ms var(--ease);
}

.page-about .about-tl__box[open] .about-tl__sum::after {
  transform: rotate(45deg);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mid);
  flex: 0 0 auto;
}

.page-about .about-tl__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-tl__body {
  padding: 0 18px 18px;
  border-left: 2px solid var(--cyan);
  margin-left: 18px;
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(11, 61, 46, 0.8);
}

/* ---------- 03 编辑台 ---------- */
.page-about .about-desk {
  padding: 60px 0;
  background:
    linear-gradient(135deg, rgba(31, 92, 70, 0.55) 0%, rgba(11, 61, 46, 0) 60%),
    var(--ink);
  color: var(--white);
}

.page-about .about-desk__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-desk__intro .eh-eyebrow {
  display: block;
  margin: 0 0 12px;
  color: var(--cyan);
}

.page-about .about-desk__title {
  color: var(--white);
  margin-bottom: 18px;
}

.page-about .about-desk__intro p {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(253, 251, 244, 0.76);
}

.page-about .about-desk__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-desk__roles li {
  padding: 18px 20px;
  background: rgba(7, 31, 24, 0.5);
  border: 1px solid rgba(159, 184, 174, 0.26);
  border-radius: var(--radius);
}

.page-about .about-desk__n {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.page-about .about-desk__roles h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-desk__roles p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(253, 251, 244, 0.7);
}

.page-about .about-desk__rhythm {
  list-style: none;
  margin: 34px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid rgba(159, 184, 174, 0.26);
  display: grid;
  gap: 14px;
}

.page-about .about-desk__rhythm li {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(253, 251, 244, 0.74);
  padding-left: 16px;
  border-left: 2px solid var(--orange);
}

.page-about .about-desk__t {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange-soft);
  margin-bottom: 4px;
}

/* ---------- 04 三审三校 ---------- */
.page-about .about-review {
  position: relative;
  overflow: hidden;
}

.page-about .about-review__bg {
  position: absolute;
  inset: 0;
  opacity: 0.1;
  pointer-events: none;
}

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

.page-about .about-review__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-steps__item {
  position: relative;
  padding: 20px 18px 22px;
  background: rgba(253, 251, 244, 0.9);
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--mid);
}

.page-about .about-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .about-steps__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(11, 61, 46, 0.78);
}

.page-about .about-review__note {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(11, 61, 46, 0.6);
}

/* ---------- 05 为谁而做 ---------- */
.page-about .about-audience__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-audience__card {
  padding: 22px 20px 24px;
  background: var(--white);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .about-audience__card:hover,
.page-about .about-audience__card:focus-within {
  border-color: var(--mid);
  box-shadow: 0 10px 26px rgba(11, 61, 46, 0.12);
}

.page-about .about-audience__card--orange {
  background: rgba(255, 122, 61, 0.06);
  border: 1.5px solid var(--orange);
}

.page-about .about-audience__card .eh-tag {
  display: inline-block;
  margin: 0 0 14px;
}

.page-about .about-audience__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .about-audience__card p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(11, 61, 46, 0.78);
}

.page-about .about-audience__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mid);
  text-decoration: none;
  border-bottom: 1px solid var(--mid);
  padding-bottom: 2px;
}

.page-about .about-audience__link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .about-audience__link:focus-visible {
  outline: 2px solid var(--mid);
  outline-offset: 3px;
}

/* ---------- 06 下一步 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-next__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-next__grid .eh-eyebrow {
  display: block;
  margin: 0 0 12px;
  color: var(--mid);
}

.page-about .about-next__grid p {
  margin: 16px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(11, 61, 46, 0.82);
}

.page-about .about-next__links {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  background: var(--paper-2);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-next__links a:hover {
  background: var(--ink);
  color: var(--white);
}

.page-about .about-next__links a:hover .about-next__arrow {
  color: var(--cyan);
  transform: translateX(4px);
}

.page-about .about-next__links a:focus-visible {
  outline: 2px solid var(--mid);
  outline-offset: 2px;
}

.page-about .about-next__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--mid);
  transition: transform 180ms var(--ease), color 180ms var(--ease);
}

/* ---------- 口号 ---------- */
.page-about .about-slogan {
  padding: 96px 0 104px;
  border-top: 1px solid var(--about-hair);
  text-align: center;
}

.page-about .about-slogan__text {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(28px, 7vw, 56px);
  letter-spacing: 0.06em;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-slogan__sub {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(11, 61, 46, 0.5);
}

/* ---------- 桌面 ---------- */
@media (min-width: 860px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 72px);
  }

  .page-about .about-hero__inner {
    padding-bottom: 76px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
    padding-top: 8px;
    border-top: 0;
    border-left: 1px solid rgba(159, 184, 174, 0.28);
    padding-left: 26px;
  }

  .page-about .about-chapter {
    padding: 92px 0;
  }

  .page-about .about-chapter__head {
    margin-bottom: 44px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-origin__fig {
    margin-top: 30px;
  }

  .page-about .about-timeline__wrap {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-timeline__fig {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-desk {
    padding: 88px 0;
  }

  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-about .about-desk__rhythm {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    margin-top: 46px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-audience__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-about .about-audience__grid > :nth-child(2) {
    margin-top: 32px;
  }

  .page-about .about-audience__grid > :nth-child(3) {
    margin-top: 64px;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-slogan {
    padding: 148px 0 156px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__wave {
    right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__sum::after,
  .page-about .about-next__arrow,
  .page-about .about-next__links a,
  .page-about .about-audience__card {
    transition: none;
  }

  .page-about .about-next__links a:hover .about-next__arrow {
    transform: none;
  }
}
<<<END>>>