.page-about {
  --about-gutter: clamp(20px, 5vw, 72px);
  --about-gap: clamp(32px, 6vw, 72px);
  background: var(--mist-50);
  color: var(--black-900);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(56px, 8vw, 104px);
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  margin: 14px 0 20px;
  max-width: 18em;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.26;
  color: var(--ink-900);
  margin: 0 0 18px;
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 84px);
  line-height: 0.86;
  color: var(--sand-300);
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.page-about .lead {
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.78;
  color: var(--ink-700);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(22px, 4vw, 36px);
}

.page-about .about-intro__head {
  padding-block: clamp(26px, 5vw, 52px) clamp(24px, 4vw, 40px);
  max-width: 46rem;
}

.page-about .about-intro__lead {
  max-width: 40em;
  margin: 0;
}

.page-about .about-intro__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .about-intro__figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(120deg, var(--ink-900), var(--ink-700) 58%, var(--sand-300));
  box-shadow: var(--shadow-soft);
}

.page-about .about-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  background: var(--haze-200);
  border-block: var(--hair);
}

.page-about .about-stat {
  background: var(--mist-50);
  padding: 18px 2px;
}

.page-about .about-stat dt {
  font-family: var(--font-interface);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-700);
  margin-bottom: 8px;
}

.page-about .about-stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1;
  color: var(--coral-500);
}

.page-about .about-stat__unit {
  font-size: 14px;
  color: var(--ink-700);
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding: 20px 0 0;
}

.page-about .about-toc a {
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* ---------- 品牌声明 ---------- */
.page-about .about-statement {
  background: var(--white);
}

.page-about .about-statement__inner {
  display: grid;
  gap: 10px;
}

.page-about .about-statement__body p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--black-900);
  margin: 0 0 18px;
  max-width: 42em;
}

.page-about .about-statement__aside {
  border-left: 3px solid var(--coral-500);
  padding-left: 16px;
  color: var(--ink-700);
  font-family: var(--font-interface);
  font-size: 15px;
}

/* ---------- 价值支柱 ---------- */
.page-about .about-pillars {
  padding-block: clamp(56px, 8vw, 104px) 0;
}

.page-about .about-pillars__head .lead {
  max-width: 40em;
  margin: 0 0 28px;
}

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

.page-about .about-pillars__figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--mist-50);
  border: var(--hair);
}

.page-about .about-pillars__figure img,
.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  font-family: var(--font-interface);
  font-size: 13px;
  color: var(--ink-700);
  padding-top: 10px;
}

.page-about .about-pillar-list {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-pillar {
  padding: clamp(26px, 4vw, 44px) var(--about-gutter);
  display: grid;
  gap: 10px;
  border-top: var(--hair);
  transition: box-shadow 0.22s var(--ease);
}

.page-about .about-pillar:hover,
.page-about .about-pillar:focus-within {
  box-shadow: inset 4px 0 0 var(--coral-500);
}

.page-about .about-pillar__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1;
  color: var(--ink-700);
  margin: 0;
}

.page-about .about-pillar h3 {
  font-family: var(--font-interface);
  font-weight: 700;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.35;
  color: var(--ink-900);
  margin: 0;
}

.page-about .about-pillar p {
  font-size: clamp(15px, 1.6vw, 16px);
  line-height: 1.8;
  color: var(--black-900);
  margin: 0;
  max-width: 44em;
}

.page-about .about-pillar--sand {
  background: var(--sand-300);
}

.page-about .about-pillar--coral {
  background: var(--coral-100);
}

.page-about .about-pillar--green {
  background: linear-gradient(90deg, rgba(47, 143, 107, 0.16), rgba(244, 248, 250, 0.2));
}

.page-about .about-pillar--deep {
  background: var(--ink-900);
}

.page-about .about-pillar--deep h3 {
  color: var(--white);
}

.page-about .about-pillar--deep p {
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-pillar--deep .about-pillar__num {
  color: var(--coral-500);
}

/* ---------- 换设备 ---------- */
.page-about .about-migrate {
  background: var(--mist-50);
}

.page-about .about-migrate__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-migrate__text p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--black-900);
  margin: 0 0 18px;
  max-width: 40em;
}

.page-about .about-migrate__text .btn {
  margin-top: 6px;
}

.page-about .about-migrate__note {
  background: var(--white);
  border: var(--hair);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 32px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-migrate__note-title {
  font-family: var(--font-interface);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-900);
  margin: 14px 0 0;
}

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

.page-about .about-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--black-900);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--haze-200);
}

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

.page-about .about-step__n {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--palm-500);
  padding-top: 2px;
}

/* ---------- 迭代节奏 ---------- */
.page-about .about-cadence {
  background: linear-gradient(180deg, rgba(232, 217, 184, 0.5), rgba(232, 217, 184, 0.1));
}

.page-about .about-cadence__lead {
  max-width: 40em;
  margin: 0 0 8px;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 clamp(32px, 5vw, 56px);
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .about-timeline li {
  border-top: 2px solid var(--ink-700);
  padding-top: 14px;
}

.page-about .about-timeline__label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-900);
  margin: 0 0 8px;
}

.page-about .about-timeline li p:last-child {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-700);
  margin: 0;
}

.page-about .about-flow {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

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

.page-about .about-flow__figure .media-frame {
  border: var(--hair);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
}

.page-about .about-flow__details {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-flow details {
  background: var(--glass-strong);
  border: var(--hair);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-flow details:hover,
.page-about .about-flow details[open] {
  border-color: var(--coral-500);
}

.page-about .about-flow summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-family: var(--font-interface);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-900);
}

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

.page-about .about-flow summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--coral-500);
  flex: none;
}

.page-about .about-flow details[open] summary::after {
  content: "\2212";
}

.page-about .about-flow details p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-700);
}

.page-about .about-flow__link {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 4px 0 0;
}

.page-about .about-flow__link a {
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 1px solid var(--haze-200);
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-flow__link a:hover,
.page-about .about-flow__link a:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-900);
  color: var(--white);
}

.page-about .about-team .section-index {
  color: rgba(255, 255, 255, 0.16);
}

.page-about .about-team h2 {
  color: var(--white);
}

.page-about .about-team__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: rgba(255, 255, 255, 0.82);
  max-width: 44em;
  margin: 0;
}

.page-about .about-team__list {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-team__list li {
  background: var(--ink-900);
  padding: 20px 18px;
}

.page-about .about-team__role {
  font-family: var(--font-interface);
  font-weight: 700;
  font-size: 15px;
  color: var(--coral-500);
  margin: 0 0 8px;
}

.page-about .about-team__list li p:last-child {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.76);
  margin: 0;
}

.page-about .about-team__note {
  margin: clamp(24px, 3vw, 32px) 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
  max-width: 44em;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-about .about-team .btn--ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.42);
}

.page-about .about-team .btn--ghost:hover,
.page-about .about-team .btn--ghost:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 18px 22px 0;
  }

  .page-about .about-stat + .about-stat {
    padding-left: 18px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }

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

@media (min-width: 900px) {
  .page-about .about-statement__inner {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 0 clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-statement .section-index {
    margin-bottom: 0;
  }

  .page-about .about-pillar {
    grid-template-columns: 110px minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 8px clamp(24px, 3.4vw, 44px);
  }

  .page-about .about-pillar__num {
    padding-top: 4px;
  }

  .page-about .about-migrate__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .page-about .about-intro__head {
    padding-block: 56px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc a,
  .page-about .about-pillar,
  .page-about .about-flow details,
  .page-about .about-flow__link a,
  .page-about .about-team .btn--ghost {
    transition: none;
  }
}

.page-about {
  --about-gutter: clamp(20px, 5vw, 72px);
  background: var(--mist-50);
  color: var(--black-900);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(56px, 8vw, 104px);
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  margin: 14px 0 20px;
  max-width: 18em;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.26;
  color: var(--ink-900);
  margin: 0 0 18px;
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 84px);
  line-height: 0.86;
  color: var(--sand-300);
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.page-about .lead {
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.78;
  color: var(--ink-700);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(22px, 4vw, 36px);
}

.page-about .about-intro__head {
  padding-block: clamp(26px, 5vw, 52px) clamp(24px, 4vw, 40px);
  max-width: 46rem;
}

.page-about .about-intro__lead {
  max-width: 40em;
  margin: 0;
}

.page-about .about-intro__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .about-intro__figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(120deg, var(--ink-900), var(--ink-700) 58%, var(--sand-300));
  box-shadow: var(--shadow-soft);
}

.page-about .about-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  background: var(--haze-200);
  border-block: var(--hair);
}

.page-about .about-stat {
  background: var(--mist-50);
  padding: 18px 2px;
}

.page-about .about-stat dt {
  font-family: var(--font-interface);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-700);
  margin-bottom: 8px;
}

.page-about .about-stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1;
  color: var(--coral-500);
}

.page-about .about-stat__unit {
  font-size: 14px;
  color: var(--ink-700);
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding: 20px 0 0;
}

.page-about .about-toc a {
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* ---------- 品牌声明 ---------- */
.page-about .about-statement {
  background: var(--white);
}

.page-about .about-statement__inner {
  display: grid;
  gap: 10px;
}

.page-about .about-statement__body p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--black-900);
  margin: 0 0 18px;
  max-width: 42em;
}

.page-about .about-statement__aside {
  border-left: 3px solid var(--coral-500);
  padding-left: 16px;
  color: var(--ink-700);
  font-family: var(--font-interface);
  font-size: 15px;
}

/* ---------- 价值支柱 ---------- */
.page-about .about-pillars {
  padding-block: clamp(56px, 8vw, 104px) 0;
}

.page-about .about-pillars__head .lead {
  max-width: 40em;
  margin: 0 0 28px;
}

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

.page-about .about-pillars__figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--mist-50);
  border: var(--hair);
}

.page-about .about-pillars__figure img,
.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  font-family: var(--font-interface);
  font-size: 13px;
  color: var(--ink-700);
  padding-top: 10px;
}

.page-about .about-pillar-list {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-pillar {
  padding: clamp(26px, 4vw, 44px) var(--about-gutter);
  display: grid;
  gap: 10px;
  border-top: var(--hair);
  transition: box-shadow 0.22s var(--ease);
}

.page-about .about-pillar:hover,
.page-about .about-pillar:focus-within {
  box-shadow: inset 4px 0 0 var(--coral-500);
}

.page-about .about-pillar__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1;
  color: var(--ink-700);
  margin: 0;
}

.page-about .about-pillar h3 {
  font-family: var(--font-interface);
  font-weight: 700;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.35;
  color: var(--ink-900);
  margin: 0;
}

.page-about .about-pillar p {
  font-size: clamp(15px, 1.6vw, 16px);
  line-height: 1.8;
  color: var(--black-900);
  margin: 0;
  max-width: 44em;
}

.page-about .about-pillar--sand {
  background: var(--sand-300);
}

.page-about .about-pillar--coral {
  background: var(--coral-100);
}

.page-about .about-pillar--green {
  background: linear-gradient(90deg, rgba(47, 143, 107, 0.16), rgba(244, 248, 250, 0.2));
}

.page-about .about-pillar--deep {
  background: var(--ink-900);
}

.page-about .about-pillar--deep h3 {
  color: var(--white);
}

.page-about .about-pillar--deep p {
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-pillar--deep .about-pillar__num {
  color: var(--coral-500);
}

/* ---------- 换设备 ---------- */
.page-about .about-migrate {
  background: var(--mist-50);
}

.page-about .about-migrate__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-migrate__text p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--black-900);
  margin: 0 0 18px;
  max-width: 40em;
}

.page-about .about-migrate__text .btn {
  margin-top: 6px;
}

.page-about .about-migrate__note {
  background: var(--white);
  border: var(--hair);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 32px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-migrate__note-title {
  font-family: var(--font-interface);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-900);
  margin: 14px 0 0;
}

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

.page-about .about-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--black-900);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--haze-200);
}

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

.page-about .about-step__n {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--palm-500);
  padding-top: 2px;
}

/* ---------- 迭代节奏 ---------- */
.page-about .about-cadence {
  background: linear-gradient(180deg, rgba(232, 217, 184, 0.5), rgba(232, 217, 184, 0.1));
}

.page-about .about-cadence__lead {
  max-width: 40em;
  margin: 0 0 8px;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 clamp(32px, 5vw, 56px);
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .about-timeline li {
  border-top: 2px solid var(--ink-700);
  padding-top: 14px;
}

.page-about .about-timeline__label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-900);
  margin: 0 0 8px;
}

.page-about .about-timeline li p:last-child {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-700);
  margin: 0;
}

.page-about .about-flow {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

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

.page-about .about-flow__figure .media-frame {
  border: var(--hair);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
}

.page-about .about-flow__details {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-flow details {
  background: var(--glass-strong);
  border: var(--hair);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-flow details:hover,
.page-about .about-flow details[open] {
  border-color: var(--coral-500);
}

.page-about .about-flow summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-family: var(--font-interface);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-900);
}

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

.page-about .about-flow summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--coral-500);
  flex: none;
}

.page-about .about-flow details[open] summary::after {
  content: "\2212";
}

.page-about .about-flow details p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-700);
}

.page-about .about-flow__link {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 4px 0 0;
}

.page-about .about-flow__link a {
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 1px solid var(--haze-200);
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-flow__link a:hover,
.page-about .about-flow__link a:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-900);
  color: var(--white);
}

.page-about .about-team .section-index {
  color: rgba(255, 255, 255, 0.16);
}

.page-about .about-team h2 {
  color: var(--white);
}

.page-about .about-team__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: rgba(255, 255, 255, 0.82);
  max-width: 44em;
  margin: 0;
}

.page-about .about-team__list {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-team__list li {
  background: var(--ink-900);
  padding: 20px 18px;
}

.page-about .about-team__role {
  font-family: var(--font-interface);
  font-weight: 700;
  font-size: 15px;
  color: var(--coral-500);
  margin: 0 0 8px;
}

.page-about .about-team__list li p:last-child {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.76);
  margin: 0;
}

.page-about .about-team__note {
  margin: clamp(24px, 3vw, 32px) 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
  max-width: 44em;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-about .about-team .btn--ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.42);
}

.page-about .about-team .btn--ghost:hover,
.page-about .about-team .btn--ghost:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 18px 22px 0;
  }

  .page-about .about-stat + .about-stat {
    padding-left: 18px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }

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

@media (min-width: 900px) {
  .page-about .about-statement__inner {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 0 clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-statement .section-index {
    margin-bottom: 0;
  }

  .page-about .about-pillar {
    grid-template-columns: 110px minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 8px clamp(24px, 3.4vw, 44px);
  }

  .page-about .about-pillar__num {
    padding-top: 4px;
  }

  .page-about .about-migrate__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .page-about .about-intro__head {
    padding-block: 56px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc a,
  .page-about .about-pillar,
  .page-about .about-flow details,
  .page-about .about-flow__link a,
  .page-about .about-team .btn--ghost {
    transition: none;
  }
}