.page-about {
  --about-rail: 56px;
  --about-line: var(--line-light);
  --about-line-dark: var(--line-dark);
}

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

.page-about .cmp-breadcrumb {
  margin-bottom: 32px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
}

.page-about .about-hero__title > span {
  display: block;
}

.page-about .about-hero__title .cmp-slab {
  margin-top: 10px;
}

.page-about .about-hero__text {
  margin: 24px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--white-muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  margin: 30px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--about-line-dark);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--white-muted);
}

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

.page-about .about-hero__note {
  display: none;
}

/* ---------- 三条准则 ---------- */
.page-about .about-creed__head {
  max-width: 62ch;
}

.page-about .about-creed__intro {
  margin: 16px 0 0;
  color: var(--white-muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-creed__grid {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-creed__item {
  background: var(--army-700);
  border-left: 3px solid var(--blaze-500);
  border-radius: 2px;
  color: var(--field-white);
  transition: background 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-creed__item:hover,
.page-about .about-creed__item[open] {
  background: var(--army-500);
}

.page-about .about-creed__item summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-creed__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--field-white);
  border: 1px solid rgba(253, 251, 246, 0.45);
  padding: 3px 7px;
}

.page-about .about-creed__name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-creed__mark {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--blaze-300);
  line-height: 1;
}

.page-about .about-creed__body {
  border-top: 1px solid rgba(253, 251, 246, 0.2);
  margin: 0 20px;
  padding: 16px 0 20px;
}

.page-about .about-creed__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(253, 251, 246, 0.86);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  background: var(--paper-200);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 10px var(--gutter);
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: block;
  white-space: nowrap;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-900);
  text-decoration: none;
  border: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--blaze-500);
  color: var(--blaze-500);
}

/* ---------- 通用双栏章节 ---------- */
.page-about .about-sec__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-sec__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 4px;
}

.page-about .about-sec__idx {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--blaze-500);
  border-left: 3px solid var(--blaze-500);
  padding-left: 8px;
}

.page-about .about-sec__note {
  display: none;
}

.page-about .about-sec__body {
  min-width: 0;
}

.page-about .about-sec__lead {
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-900);
}

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

/* ---------- 数据块 ---------- */
.page-about .about-figures {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--paper-200);
  border: 1px solid var(--paper-200);
  border-radius: 2px;
}

.page-about .about-figure-cell {
  background: var(--paper-50);
  padding: 20px;
  display: grid;
  gap: 4px;
}

.page-about .about-figure-cell__num {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--army-700);
}

.page-about .about-figure-cell__label {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .about-figure-cell__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-muted);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .about-tl__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  padding-bottom: 26px;
}

.page-about .about-tl__ver {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--army-700);
  text-align: right;
  padding-right: 12px;
  padding-top: 4px;
}

.page-about .about-tl__main {
  position: relative;
  border-left: 1px dashed var(--paper-200);
  padding: 0 0 0 20px;
}

.page-about .about-tl__main::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--blaze-500);
}

.page-about .about-tl__main .cmp-h3 {
  margin: 0;
}

.page-about .about-tl__main p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-about .about-tl__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--paper-200);
}

.page-about .about-tl__count {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

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

.page-about .about-team__list {
  border-top: 1px solid var(--paper-200);
}

.page-about .about-team__row {
  border-bottom: 1px solid var(--paper-200);
}

.page-about .about-team__row summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
  min-width: 0;
}

.page-about .about-team__num {
  font-size: 14px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--blaze-500);
  white-space: nowrap;
}

.page-about .about-team__mark {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--army-500);
}

.page-about .about-team__row[open] .about-team__mark {
  color: var(--blaze-500);
}

.page-about .about-team__detail {
  padding: 0 2px 16px;
}

.page-about .about-team__detail p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-about .about-team__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--army-700);
  border-left: 3px solid var(--army-700);
  padding-left: 12px;
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage__layout {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

.page-about .about-coverage__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-muted);
}

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

.page-about .about-coverage__stats {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--paper-200);
  border: 1px solid var(--paper-200);
}

.page-about .about-coverage__stats li {
  background: var(--paper-50);
  padding: 14px 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

.page-about .about-coverage__stats strong {
  display: block;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink-900);
  letter-spacing: -0.01em;
}

/* ---------- 接入五步 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 18px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  border-top: 3px solid var(--army-700);
  padding-top: 14px;
}

.page-about .about-step__num {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--blaze-500);
  letter-spacing: 0.04em;
}

.page-about .about-step .cmp-h3 {
  margin: 6px 0 0;
}

.page-about .about-step p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-about .about-onboard__foot {
  margin-top: 32px;
  padding: 22px;
  background: var(--paper-200);
  border-radius: 2px;
  border-left: 3px solid var(--blaze-500);
}

.page-about .about-onboard__foot p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-900);
}

.page-about .about-onboard__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 联络 ---------- */
.page-about .about-contact__head {
  max-width: 62ch;
}

.page-about .about-contact__intro {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--white-muted);
}

.page-about .about-contact__grid {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.page-about .about-contact__card {
  background: var(--indigo-800);
  border-left: 3px solid var(--blaze-500);
  border-radius: 2px;
  padding: 22px;
}

.page-about .about-contact__card .cmp-h3 {
  margin: 0 0 10px;
  color: var(--field-white);
  font-size: 14px;
  letter-spacing: 0.12em;
}

.page-about .about-contact__value {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--blaze-300);
  overflow-wrap: anywhere;
}

.page-about .about-contact__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--white-muted);
}

.page-about .about-contact__more {
  display: grid;
  gap: 1px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-contact__link {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  text-decoration: none;
  color: var(--field-white);
  border-bottom: 1px solid var(--about-line-dark);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-about .about-contact__link .cmp-mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--blaze-300);
}

.page-about .about-contact__link span:last-child {
  font-size: 15px;
  line-height: 1.7;
  color: var(--white-muted);
}

.page-about .about-contact__link:hover,
.page-about .about-contact__link:focus-visible {
  color: var(--blaze-300);
  padding-left: 6px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__text {
    font-size: 17px;
  }

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

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

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

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

  .page-about .about-sec__grid {
    gap: 28px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) 44px minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-hero__note {
    display: block;
    align-self: start;
    margin: 4px 0 0;
    font-size: 12px;
    letter-spacing: 0.35em;
    color: var(--white-muted);
  }

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

  .page-about .about-creed__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-sec__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-sec__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding-top: 8px;
    border-right: 1px dashed var(--paper-200);
    padding-right: 16px;
  }

  .page-about .about-sec__note {
    display: block;
    font-size: 12px;
    letter-spacing: 0.35em;
    color: var(--ink-muted);
  }

  .page-about .about-tl__item {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-coverage__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .about-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-contact__more {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }

  .page-about .about-figure-cell__num {
    font-size: 42px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-sec__grid {
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-creed__item,
  .page-about .about-contact__link,
  .page-about .about-index__link {
    transition: none;
  }
}

.page-about :focus-visible {
  outline: 2px solid var(--blaze-300);
  outline-offset: 2px;
}
<<<END>>>