.page-about {
  --about-gap: clamp(1.4rem, 3vw, 2.6rem);
  --about-block: clamp(2.6rem, 6vw, 4.8rem);
  background: var(--ink-950);
  color: var(--paper);
}

.page-about .about-crumb {
  padding-top: 1.2rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 1.2rem 0 clamp(2.2rem, 5vw, 3.6rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 150%;
  pointer-events: none;
  background:
    linear-gradient(152deg, rgba(43, 224, 200, 0.16) 0%, rgba(43, 224, 200, 0) 44%),
    linear-gradient(212deg, rgba(242, 179, 61, 0.13) 0%, rgba(242, 179, 61, 0) 40%);
  clip-path: polygon(0 0, 68% 0, 40% 100%, 0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: linear-gradient(162deg, #000 0%, transparent 66%);
  mask-image: linear-gradient(162deg, #000 0%, transparent 66%);
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 0.9rem 0 1.1rem;
  max-width: 13em;
  font-size: clamp(2.05rem, 6.2vw, 4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

/* 品牌速览面板 */
.page-about .about-facts {
  margin-top: 2.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--cyan);
}

.page-about .about-facts__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__row dt {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.page-about .about-facts__row dd {
  margin: 0;
  text-align: right;
  font-size: 0.94rem;
  color: var(--paper);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.24rem;
  font-weight: 600;
  color: var(--amber);
}

.page-about .about-facts__icp {
  font-size: 0.74rem;
  letter-spacing: -0.01em;
  color: var(--muted);
  word-break: break-all;
}

.page-about .about-hero__figure-wrap {
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
}

/* ---------- 通用分区 ---------- */
.page-about .section {
  padding: var(--about-block) 0;
  border-top: 1px solid var(--line);
}

.page-about .section__head {
  max-width: 40rem;
}

.page-about .section__title {
  margin: 0.55rem 0 0.85rem;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-about .section__lead {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.page-about .figure__media {
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-800), var(--ink-700));
}

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

.page-about .figure__media--wide {
  aspect-ratio: 2 / 1;
}

.page-about .figure__media--tall {
  aspect-ratio: 4 / 5;
}

.page-about .figure__caption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.6;
}

/* ---------- 缘起 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 1.4rem;
}

.page-about .about-origin__body .lead {
  margin: 0 0 1rem;
  color: var(--paper);
  font-size: 1.06rem;
  line-height: 1.85;
}

.page-about .about-origin__body p {
  max-width: 36em;
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.85;
}

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

.page-about .about-em {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.page-about .about-origin__figure {
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
}

.page-about .about-origin__figure .figure__media {
  aspect-ratio: 16 / 10;
}

/* ---------- 三种屏幕 ---------- */
.page-about .about-modes__grid {
  display: grid;
  margin-top: 2rem;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-mode {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-mode:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-mode__index {
  margin: 0 0 0.7rem;
  font-family: var(--font-serif);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--cyan);
  opacity: 0.85;
}

.page-about .about-mode__title {
  margin: 0 0 0.6rem;
  font-size: 1.14rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-mode__text {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.85;
}

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

/* ---------- 时间轴 ---------- */
.page-about .about-track__grid {
  display: grid;
  gap: 1.8rem;
}

.page-about .about-track__list {
  margin: 0;
  padding: 0 0 0 1.4rem;
  list-style: none;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-track__item {
  position: relative;
  padding-bottom: 1.9rem;
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: 0.5rem;
  width: 7px;
  height: 7px;
  margin-left: -4px;
  background: var(--cyan);
}

.page-about .about-track__stage {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-track__title {
  margin: 0 0 0.45rem;
  font-size: 1.06rem;
  font-weight: 800;
}

.page-about .about-track__text {
  max-width: 32em;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ---------- 谁在用 ---------- */
.page-about .about-audience__grid {
  display: grid;
  gap: 1.8rem;
}

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

.page-about .about-audience__items {
  margin-top: 1.6rem;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-audience__item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-audience__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-audience__title {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--cyan-soft);
}

.page-about .about-audience__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  background: var(--ink-900);
}

.page-about .about-contact__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-contact__text {
  max-width: 34em;
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-contact__list {
  margin: 0;
  padding-top: 0.4rem;
  border-top: 1px solid var(--rose);
}

.page-about .about-contact__row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__row dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  word-break: break-word;
}

.page-about .about-contact__hint {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.7;
}

/* ---------- 下一步 ---------- */
.page-about .about-next__head {
  margin-bottom: 1.6rem;
}

.page-about .about-next__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.25rem 1.1rem;
  background: var(--ink-950);
  color: var(--paper);
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--ink-700);
  color: var(--cyan-soft);
}

.page-about .about-next__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-next__value {
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ---------- 动效 ---------- */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

.js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-contact__row {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 1.2rem;
  }

  .page-about .about-contact__row dt {
    flex: 0 0 auto;
  }

  .page-about .about-contact__row dd {
    text-align: right;
  }
}

@media (min-width: 760px) {
  .page-about .about-modes__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 0;
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-mode {
    padding: 1.5rem 1.2rem 1.6rem 0;
    border-bottom: 0;
  }

  .page-about .about-mode + .about-mode {
    padding-left: 1.2rem;
    padding-right: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-mode:last-child {
    padding-bottom: 1.6rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2vw, 2.2rem);
    align-items: start;
  }

  .page-about .about-hero__copy {
    grid-column: 1 / span 7;
  }

  .page-about .about-facts {
    grid-column: 9 / span 4;
    margin-top: 0.5rem;
  }

  .page-about .about-origin__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.4vw, 2.6rem);
  }

  .page-about .about-origin__side {
    grid-column: 1 / span 4;
  }

  .page-about .about-origin__body {
    grid-column: 6 / span 7;
  }

  .page-about .about-track__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.4vw, 2.6rem);
  }

  .page-about .about-track__head {
    grid-column: 1 / span 4;
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }

  .page-about .about-track__list {
    grid-column: 6 / span 7;
  }

  .page-about .about-audience__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.4vw, 2.6rem);
    align-items: start;
  }

  .page-about .about-audience__figure {
    grid-column: 1 / span 5;
    margin-top: 0.3rem;
  }

  .page-about .about-audience__body {
    grid-column: 7 / span 6;
  }

  .page-about .about-contact__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.4vw, 2.6rem);
    align-items: start;
  }

  .page-about .about-contact__copy {
    grid-column: 1 / span 7;
  }

  .page-about .about-contact__list {
    grid-column: 9 / span 4;
  }
}

@media (min-width: 960px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-origin__figure .figure__media {
    aspect-ratio: 21 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-next__link {
    transition: none;
  }
}
<<<END>>>