.page-about {
  --ab-pad: clamp(40px, 7vw, 84px);
  --ab-gap: clamp(18px, 2.6vw, 32px);
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

.page-about .ab-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .ab-title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .ab-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .ab-head {
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

/* 首屏 */
.page-about .ab-hero {
  padding-bottom: var(--ab-pad);
  overflow-x: clip;
  background:
    radial-gradient(90% 70% at 92% -10%, rgba(63, 224, 197, .13), transparent 62%),
    radial-gradient(70% 60% at -10% 110%, rgba(242, 214, 75, .09), transparent 60%);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .ab-hero__title {
  margin: 0 0 18px;
  max-width: 16em;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.025em;
  color: var(--paper);
}

.page-about .ab-hero__lede {
  margin: 0 0 22px;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .ab-hero__meta {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 14px;
  color: var(--text-dim);
}

.page-about .ab-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero__visual {
  margin: 0;
  position: relative;
  isolation: isolate;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .ab-hero__visual::after {
  content: "";
  position: absolute;
  inset: 10px -6px -6px 10px;
  z-index: -1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(242, 214, 75, .08);
}

.page-about .ab-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

/* 版本时间轴 */
.page-about .ab-timeline {
  padding: var(--ab-pad) 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(7, 19, 31, .6), transparent 42%);
}

.page-about .ab-rail {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-rail__item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 18px;
}

.page-about .ab-rail__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-rail__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 0;
  border-left: 2px dashed rgba(43, 66, 87, .9);
}

.page-about .ab-rail__item:last-child::before {
  bottom: auto;
  height: 24px;
}

.page-about .ab-rail__node {
  position: absolute;
  left: 0;
  top: 16px;
  z-index: 1;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--ink);
  border: 2px solid var(--lemon);
}

.page-about .ab-rail__node::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lemon);
}

.page-about .ab-rail__node--now {
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(63, 224, 197, .13);
}

.page-about .ab-rail__node--now::after {
  background: var(--cyan);
}

.page-about .ab-ver {
  position: relative;
  padding: clamp(16px, 2.2vw, 26px);
  border: 1px solid rgba(7, 19, 31, .16);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--night);
}

.page-about .ab-ver__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  margin-bottom: 14px;
}

.page-about .ab-ver__num {
  flex: none;
  padding: 3px 9px;
  border-radius: 2px;
  background: var(--lemon);
  color: var(--night);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}

.page-about .ab-ver__title {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.32;
  font-weight: 800;
  color: var(--night);
}

.page-about .ab-ver__rows {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-ver__rows > div {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-about .ab-ver__rows dt {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: #7A8B96;
}

.page-about .ab-ver__rows dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: #24394B;
}

.page-about .ab-ver__hand {
  margin: 14px 0 0;
  font-family: var(--font-hand);
  font-size: 14px;
  line-height: 1.5;
  color: #B0442C;
  transform: rotate(-.8deg);
}

/* 使用者 */
.page-about .ab-audience {
  padding: var(--ab-pad) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.page-about .ab-audience__layout {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

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

.page-about .ab-persona {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, .72);
}

.page-about .ab-persona::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 2px;
  background: var(--lemon);
}

.page-about .ab-persona--cyan::before {
  background: var(--cyan);
}

.page-about .ab-persona--coral::before {
  background: var(--coral);
}

.page-about .ab-persona--mist::before {
  background: var(--mist);
}

.page-about .ab-persona__role {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .ab-persona__title {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.36;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-persona__text {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text-dim);
}

.page-about .ab-persona__link {
  display: inline-block;
  font-size: 13px;
}

.page-about .ab-audience__visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--night);
}

.page-about .ab-audience__visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* 流程 */
.page-about .ab-process {
  padding: var(--ab-pad) 0;
}

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

.page-about .ab-flow__step {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 41, 61, .92), rgba(7, 19, 31, .92));
}

.page-about .ab-flow__trigger {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-flow__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--coral);
}

.page-about .ab-flow__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-flow__trigger::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-flow__trigger[aria-expanded="true"]::after {
  content: "–";
}

.page-about .ab-flow__sum {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.66;
  color: var(--text-dim);
}

.page-about .ab-flow__panel {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .ab-flow__panel p {
  margin: 0;
}

/* 修复批次 */
.page-about .ab-batch {
  padding: var(--ab-pad) 0;
  background: var(--paper);
  color: var(--night);
}

.page-about .ab-batch .ab-kicker {
  color: #B0442C;
}

.page-about .ab-batch .ab-title {
  color: var(--night);
}

.page-about .ab-batch .ab-lede {
  color: #3B4F5F;
}

.page-about .ab-batch__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.page-about .ab-batch__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-batch__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid rgba(7, 19, 31, .16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .55);
  font-size: 14px;
  line-height: 1.55;
  color: #24394B;
}

.page-about .ab-batch__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--night);
}

.page-about .ab-batch__visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(7, 19, 31, .18);
  border-radius: var(--radius);
  background: var(--night);
}

.page-about .ab-batch__visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* 分工 */
.page-about .ab-crew {
  padding: var(--ab-pad) 0;
}

.page-about .ab-crew__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

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

.page-about .ab-lane {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(19, 41, 61, .55);
}

.page-about .ab-lane__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .ab-lane__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-lane__count {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--lemon);
}

.page-about .ab-lane__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text-dim);
}

/* 四个习惯 */
.page-about .ab-habits {
  padding: var(--ab-pad) 0;
  border-top: 1px dashed var(--line);
}

.page-about .ab-habits__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(24px, 3vw, 32px);
}

.page-about .ab-habit {
  position: relative;
  isolation: isolate;
  padding: 20px 18px 22px;
  border-radius: var(--radius);
}

.page-about .ab-habit::before,
.page-about .ab-habit::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: var(--radius);
}

.page-about .ab-habit::before {
  background: rgba(247, 244, 236, .16);
  transform: translate(7px, 7px) rotate(1.6deg);
}

.page-about .ab-habit::after {
  background: var(--paper);
  transform: translate(3px, 3px) rotate(.6deg);
}

.page-about .ab-habit > * {
  position: relative;
  z-index: 1;
}

.page-about .ab-habit__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: #B0442C;
}

.page-about .ab-habit__title {
  margin: 8px 0;
  font-size: 17px;
  line-height: 1.36;
  font-weight: 800;
  color: var(--night);
}

.page-about .ab-habit__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #2C4152;
}

/* 下一步 */
.page-about .ab-next {
  padding: 0 0 var(--ab-pad);
}

.page-about .ab-next__panel {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(242, 214, 75, .1), transparent 55%),
    var(--panel);
}

.page-about .ab-next__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--paper);
}

.page-about .ab-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
}

@media (min-width: 760px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

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

  .page-about .ab-ver__rows > div {
    grid-template-columns: 52px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .ab-rail__item {
    padding-left: 58px;
    padding-bottom: 22px;
  }

  .page-about .ab-rail__item::before {
    left: 15px;
  }

  .page-about .ab-rail__node {
    width: 32px;
    height: 32px;
    top: 18px;
  }

  .page-about .ab-audience__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

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

  .page-about .ab-batch__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .ab-crew__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  }

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

@media (min-width: 1180px) {
  .page-about .ab-hero__title {
    font-size: 58px;
  }
}
<<<END>>>