.page-about {
  --about-body-ink: rgba(10, 15, 13, .82);
  --about-paper-line: rgba(10, 15, 13, .14);
  --about-soft-ink: #5A665F;
  background: var(--ink-800);
  color: var(--white);
  overflow-x: clip;
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */

.about-mast {
  position: relative;
  padding: 36px 0 60px;
  background:
    radial-gradient(130% 105% at 86% -22%, rgba(56, 242, 198, .17), transparent 62%),
    linear-gradient(168deg, var(--ink-800) 0%, var(--ink-900) 100%);
  overflow: hidden;
}

.about-mast::before {
  content: "";
  position: absolute;
  right: -150px;
  top: -130px;
  width: 430px;
  height: 430px;
  border: 1px solid rgba(56, 242, 198, .22);
  border-radius: 50%;
  pointer-events: none;
}

.about-mast::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 242, 198, .55), transparent);
}

.about-mast .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-mast .breadcrumbs {
  margin-bottom: 26px;
}

.about-mast__title {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(31px, 5.4vw, 74px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.025em;
  color: var(--white);
}

.about-mast__lead {
  margin: 24px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
  color: rgba(255, 255, 255, .78);
}

.about-mast__stats {
  list-style: none;
  margin: 46px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.about-stat {
  padding: 16px 14px 14px 0;
  border-top: 1px solid rgba(56, 242, 198, .34);
}

.about-stat__v {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.about-stat__v small {
  font-size: .48em;
  font-weight: 500;
  margin-left: 3px;
  letter-spacing: 0;
}

.about-stat__k {
  display: block;
  margin-top: 9px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 纸面板堆叠 ---------- */

.about-deck {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 20px 76px;
}

.about-sheet-wrap {
  margin-top: 30px;
}

.about-sheet-wrap:first-child {
  margin-top: 54px;
}

.about-sheet {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 28px 20px 32px;
  background: var(--paper);
  color: var(--ink-black);
  box-shadow: -8px 8px 0 0 var(--ink-700), 0 22px 46px rgba(0, 0, 0, .38);
}

.about-sheet__rail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.about-num {
  font-family: var(--font-display);
  font-size: clamp(42px, 7vw, 68px);
  font-weight: 700;
  line-height: .85;
  letter-spacing: -.05em;
  color: rgba(11, 110, 88, .13);
  -webkit-text-stroke: 1.5px var(--teal-ink);
}

.about-rail__label {
  margin-top: 12px;
  padding-top: 6px;
  border-top: 2px solid var(--orange);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--teal-ink);
}

.about-sheet__body > * + * {
  margin-top: 18px;
}

.page-about .about-sheet .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--ink-black);
}

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

.page-about .about-sheet .about-sheet__intro {
  font-size: 15px;
  color: var(--about-soft-ink);
}

.page-about .about-inline-link {
  display: inline-block;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--orange);
  font-size: 14px;
  font-weight: 700;
  color: var(--teal-ink);
  text-decoration: none;
}

/* ---------- 三条内容线 ---------- */

.about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.about-line {
  position: relative;
  padding: 20px 18px 22px;
  background: #FBF6EC;
  border-top: 3px solid var(--teal-ink);
  box-shadow: -5px 5px 0 0 var(--paper-shadow);
}

.about-line--orange {
  border-top-color: var(--orange);
}

.about-line__tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .about-line .tag {
  padding: 4px 9px;
  font-size: 11px;
  letter-spacing: .16em;
  background: rgba(11, 110, 88, .1);
  border: 1px solid rgba(11, 110, 88, .3);
  color: var(--teal-ink);
}

.page-about .about-line .tag--orange {
  background: rgba(255, 122, 61, .16);
  border-color: rgba(255, 122, 61, .48);
  color: #A83F17;
}

.about-line h3 {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-black);
}

.page-about .about-line p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body-ink);
}

.about-line__link {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--orange);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--teal-ink);
  text-decoration: none;
}

/* ---------- 通栏分隔图 ---------- */

.about-break {
  margin: 36px 0 0;
}

.about-break img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  box-shadow: -8px 8px 0 0 var(--ink-700);
}

.about-break figcaption {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 团队与流程 ---------- */

.about-sheet__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.about-sheet__copy > * + * {
  margin-top: 16px;
}

.about-flow {
  list-style: none;
  counter-reset: aboutflow;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.about-flow__item {
  position: relative;
  padding: 13px 14px 13px 50px;
  background: rgba(10, 15, 13, .05);
  border-left: 3px solid var(--teal-ink);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-body-ink);
}

.about-flow__item::before {
  counter-increment: aboutflow;
  content: counter(aboutflow, decimal-leading-zero);
  position: absolute;
  left: 15px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--teal-ink);
}

.about-flow__item strong {
  color: var(--ink-black);
}

.about-sheet__media {
  margin: 0;
}

.about-sheet__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  box-shadow: -6px 6px 0 0 rgba(11, 110, 88, .26);
}

/* ---------- 更新节奏 ---------- */

.about-cadence {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-paper-line);
}

.about-cadence li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-paper-line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-body-ink);
}

.about-cadence__k {
  flex: 0 0 auto;
  min-width: 186px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink-black);
}

/* ---------- 收录规模刻度尺 ---------- */

.about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
}

.about-scale__cell {
  padding: 16px 12px 18px;
  background: var(--paper);
}

.about-scale__cell::before {
  content: "";
  display: block;
  width: 20px;
  height: 3px;
  margin-bottom: 12px;
  background: var(--orange);
}

.about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(23px, 2.6vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink-black);
}

.about-scale__num small {
  font-size: .48em;
  font-weight: 500;
  margin-left: 3px;
  letter-spacing: 0;
  color: var(--teal-ink);
}

.about-scale__label {
  display: block;
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--about-soft-ink);
}

.about-sheet__wide {
  margin: 26px 0 0;
}

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

.about-sheet__wide figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--about-soft-ink);
}

/* ---------- 斜线时间线 ---------- */

.about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.about-tl__item {
  position: relative;
  padding-left: 26px;
  border-left: 2px dashed rgba(11, 110, 88, .4);
}

.about-tl__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--cyan);
  box-shadow: 0 0 0 1.5px var(--teal-ink);
  transition: box-shadow .25s var(--ease);
}

.about-tl__item:hover::before {
  box-shadow: 0 0 0 1.5px var(--teal-ink), 0 0 14px rgba(56, 242, 198, .95);
}

.about-tl__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--teal-ink);
}

.about-tl__item h3 {
  margin: 7px 0 6px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--ink-black);
}

.page-about .about-tl__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body-ink);
}

/* ---------- 合作与咨询 ---------- */

.about-coop {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.about-coop li {
  padding: 14px 16px;
  background: rgba(10, 15, 13, .045);
  border-left: 3px solid var(--teal-ink);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body-ink);
}

.about-coop li strong {
  color: var(--ink-black);
}

.page-about .about-coop__note {
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-body-ink);
}

.about-coop__note strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink-black);
}

.page-about .about-cta-btn {
  display: inline-block;
  margin-top: 6px;
  padding: 13px 26px;
  background: var(--ink-800);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  box-shadow: -5px 5px 0 0 var(--orange);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-cta-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: -7px 7px 0 0 var(--orange);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .about-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .about-sheet {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 34px;
    padding: 42px 48px 48px 42px;
  }

  .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .about-line:nth-child(2) {
    margin-top: 26px;
  }

  .about-line:nth-child(3) {
    margin-top: 52px;
  }

  .about-sheet__split {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 30px;
    align-items: start;
  }

  .about-tl__item:nth-child(2) {
    margin-left: 36px;
  }

  .about-tl__item:nth-child(3) {
    margin-left: 72px;
  }

  .about-tl__item:nth-child(4) {
    margin-left: 108px;
  }

  .about-tl__item:nth-child(5) {
    margin-left: 144px;
  }
}

@media (min-width: 1080px) {
  .about-mast__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .about-scale {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .about-sheet:nth-child(odd) {
    transform: rotate(-.4deg);
  }

  .about-sheet:nth-child(even) {
    transform: rotate(.45deg);
  }
}

@media (max-width: 480px) {
  .about-mast {
    padding: 26px 0 46px;
  }

  .about-sheet {
    padding: 24px 16px 28px;
    box-shadow: -6px 6px 0 0 var(--ink-700), 0 16px 34px rgba(0, 0, 0, .35);
  }

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

  .about-flow__item {
    padding-left: 44px;
  }
}
<<<END>>>