.page-about {
  --about-panel-line: rgba(255, 255, 255, .14);
  --about-panel-text: #A9B4C0;
  background: var(--paper);
  color: var(--ink-deep);
  overflow-x: hidden;
}

.page-about .about-hero {
  position: relative;
  padding: calc(var(--gutter) * 1.1) 0 clamp(36px, 6vw, 64px);
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 72px 100%;
}

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

.page-about .about-hero .breadcrumb,
.page-about .about-hero .breadcrumb a {
  color: var(--about-panel-text);
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--cyan);
}

.page-about .about-hero .eyebrow {
  color: var(--cyan);
  margin-top: clamp(20px, 4vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 8px;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 104px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__title span {
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  color: #DDE3EA;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  align-self: end;
  padding: 20px 20px 8px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--about-panel-line);
  border-top: 4px solid var(--red);
}

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

.page-about .about-stat-list {
  margin: 8px 0 0;
}

.page-about .about-stat-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid var(--about-panel-line);
}

.page-about .about-stat-list > div:first-child {
  border-top: 0;
}

.page-about .about-stat-list dt {
  font-size: 13px;
  color: var(--about-panel-text);
}

.page-about .about-stat-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--white);
  text-align: right;
}

.page-about .about-stat-list dd .num {
  font-size: 24px;
  line-height: 1;
  color: var(--yellow);
}

.page-about .about-index {
  background: var(--paper-warm);
  border-bottom: 1px solid var(--paper-edge);
}

.page-about .about-index__inner {
  display: flex;
  gap: 6px;
  padding: 10px var(--gutter);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid transparent;
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--ink);
  background: var(--white);
}

.page-about .about-index .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--red);
}

.page-about .about-chapter {
  padding: clamp(44px, 7vw, 84px) 0;
  border-bottom: 1px solid var(--paper-edge);
}

.page-about .about-chapter__head {
  max-width: 68ch;
}

.page-about .about-chapter__head .h-section {
  margin: 12px 0 0;
  color: var(--ink);
}

.page-about .about-chapter__head .lede {
  margin: 16px 0 0;
  color: #3A4450;
}

.page-about .about-figure {
  margin: 28px 0 0;
}

.page-about .about-figure .media-frame {
  overflow: hidden;
  background: var(--paper-warm);
}

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

.page-about .about-figure .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

/* 时间轴 */
.page-about .tl {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 26px 28px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 0;
  width: 2px;
  background: var(--paper-edge);
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px var(--paper);
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--red);
}

.page-about .tl__card {
  padding: 18px 18px 20px;
  background: var(--white);
  border: 1px solid var(--paper-edge);
  border-left: 4px solid var(--ink);
  box-shadow: var(--shadow-card);
}

.page-about .tl__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .tl__card h3 {
  margin: 8px 0 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .tl__card p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: #3A4450;
}

.page-about .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

/* 团队 */
.page-about .about-split {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .about-split .about-figure {
  margin: 0;
}

.page-about .about-split__body p {
  margin: 0 0 14px;
  font-size: var(--step-0);
  line-height: 1.75;
  color: #3A4450;
}

.page-about .check-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  counter-reset: chk;
  display: grid;
  gap: 10px;
}

.page-about .check-list li {
  position: relative;
  padding: 14px 16px 14px 58px;
  background: var(--white);
  border: 1px solid var(--paper-edge);
}

.page-about .check-list li::before {
  counter-increment: chk;
  content: "0" counter(chk);
  position: absolute;
  left: 16px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--red);
}

.page-about .check-list strong {
  display: block;
  font-size: 15px;
  color: var(--ink);
}

.page-about .check-list p {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .stat {
  padding: 16px;
  background: var(--white);
  border-top: 3px solid var(--red);
  box-shadow: var(--shadow-card);
}

.page-about .stat .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .stat .label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

/* 合作网络 */
.page-about .about-figures {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-figures li {
  padding: 18px;
  background: var(--paper-warm);
  border-left: 4px solid var(--cyan-ink);
}

.page-about .about-figures .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-figures p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: #3A4450;
}

.page-about .about-body-text {
  margin: 26px 0 0;
  max-width: 66ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: #3A4450;
}

/* 服务 */
.page-about .about-chapter--service {
  background: var(--paper-warm);
}

.page-about .about-service {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-service__card {
  padding: 22px;
}

.page-about .about-service__card h3 {
  margin: 8px 0 12px;
  font-family: var(--font-serif);
  font-size: 21px;
  color: var(--ink);
}

.page-about .about-service__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #3A4450;
}

.page-about .about-service__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--red);
}

.page-about .about-service__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-service__list li {
  position: relative;
  padding: 9px 0 9px 18px;
  border-top: 1px solid var(--paper-edge);
  font-size: 14px;
  line-height: 1.6;
  color: #3A4450;
}

.page-about .about-service__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 7px;
  height: 7px;
  background: var(--cyan-ink);
}

.page-about .about-service__card--ink {
  background: var(--ink);
  border-top: 4px solid var(--cyan);
}

.page-about .about-service__card--ink h3 {
  color: var(--white);
}

.page-about .about-service__card--ink p {
  color: #DDE3EA;
}

.page-about .about-service__card--ink .about-service__kicker {
  color: var(--cyan);
}

.page-about .about-service__contact {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
}

.page-about .about-service__contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 10px 0;
  border-top: 1px solid var(--about-panel-line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
}

.page-about .about-service__contact span {
  min-width: 68px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--about-panel-text);
}

.page-about .about-service__contact a {
  color: var(--cyan);
  text-decoration: none;
  word-break: break-all;
}

.page-about .about-service__contact a:hover,
.page-about .about-service__contact a:focus-visible {
  text-decoration: underline;
}

/* 案例带 */
.page-about .about-band {
  padding: clamp(44px, 7vw, 84px) 0;
  background: var(--ink);
  color: var(--white);
}

.page-about .about-band .eyebrow {
  color: var(--yellow);
}

.page-about .about-band h2 {
  margin: 12px 0 0;
  color: var(--white);
}

.page-about .about-band__lede {
  margin: 16px 0 0;
  max-width: 62ch;
  color: #DDE3EA;
}

.page-about .about-ledger {
  display: grid;
  gap: 16px;
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .about-ledger li {
  padding: 20px;
  border: 1px solid var(--about-panel-line);
  border-top: 3px solid var(--red);
  background: rgba(255, 255, 255, .04);
}

.page-about .about-ledger .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 56px);
  line-height: 1;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-ledger h3 {
  margin: 10px 0 8px;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-ledger p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #DDE3EA;
}

.page-about .about-band__note {
  margin: 30px 0 0;
  max-width: 66ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: #DDE3EA;
}

.page-about .about-band__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 结尾入口 */
.page-about .about-cta {
  padding: clamp(38px, 6vw, 68px) 0;
  background: var(--paper);
  border-top: 4px solid var(--ink);
}

.page-about .about-cta__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  color: var(--ink);
}

.page-about .about-cta__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-cta__grid a {
  display: block;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--paper-edge);
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}

.page-about .about-cta__grid a:hover,
.page-about .about-cta__grid a:focus-visible {
  border-color: var(--red);
  transform: translateY(-2px);
}

.page-about .about-cta__grid .num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--red);
}

.page-about .about-cta__grid strong {
  display: block;
  margin: 6px 0 8px;
  font-family: var(--font-serif);
  font-size: 19px;
}

.page-about .about-cta__grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

@media (min-width: 640px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .about-hero__panel {
    margin-bottom: 8px;
  }

  .page-about .tl__item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 0 40px;
    padding-left: 0;
    padding-bottom: 30px;
  }

  .page-about .tl__item::before {
    left: 168px;
    top: 22px;
  }

  .page-about .tl__item::after {
    left: 162px;
    top: 16px;
  }

  .page-about .tl__year {
    padding-top: 12px;
    text-align: right;
    font-size: 34px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-figure--split .media-frame {
    aspect-ratio: 3 / 4;
  }

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