/* =========================================================
   page: about — 品牌故事
   ========================================================= */

.page-about {
  background: var(--wd-black);
  color: var(--text-mid);
  font-family: var(--font-sans);
}

.page-about .ab-textlink {
  color: var(--wd-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 155, 255, 0.42);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-textlink:hover {
  color: var(--wd-white);
  border-bottom-color: var(--wd-white);
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--wd-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 共用排版 ---------- */

.page-about .section__index {
  display: block;
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--wd-red-soft);
}

.page-about .section__title {
  margin: 0 0 20px;
  font-size: clamp(1.7rem, 4.4vw, 2.75rem);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--wd-white);
}

.page-about .ab-copy p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-mid);
}

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

.page-about .media-frame {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--wd-gray-900);
  border: 1px solid var(--line-dark);
}

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

.page-about figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 01 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  padding: 22px 0 52px;
  background:
    radial-gradient(120% 88% at 94% -12%, rgba(224, 27, 47, 0.42), transparent 60%),
    radial-gradient(80% 70% at 4% 4%, rgba(47, 155, 255, 0.14), transparent 62%),
    var(--wd-black);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-hero__crumb {
  margin-bottom: 30px;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .ab-years__label {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--wd-green);
}

.page-about .ab-years__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-years__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-years__link .mono {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .ab-years__link em {
  font-style: normal;
  font-size: 12px;
}

.page-about .ab-years__link:hover {
  color: var(--wd-white);
  border-bottom-color: var(--wd-green);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--wd-red-soft);
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  max-width: 18ch;
  font-size: clamp(2.15rem, 7.6vw, 5.25rem);
  line-height: 0.98;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--wd-white);
}

.page-about .ab-hero__lead {
  margin: 0 0 34px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--text-mid);
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-hero__cell {
  padding: 18px 16px 20px;
  background: var(--wd-gray-900);
}

.page-about .ab-hero__cell-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 0 8px;
}

.page-about .ab-hero__cell-value .mono {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wd-green);
}

.page-about .ab-hero__cell-unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .ab-hero__cell-label {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

@media (min-width: 720px) {
  .page-about .ab-hero {
    padding: 26px 0 72px;
  }

  .page-about .ab-hero__lead {
    font-size: 1.0625rem;
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .ab-years {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .ab-years__list {
    flex-direction: column;
    gap: 0;
  }

  .page-about .ab-years__link {
    justify-content: flex-start;
    gap: 12px;
    padding: 9px 0;
    border-bottom: none;
    border-left: 2px solid transparent;
    padding-left: 12px;
    margin-left: -14px;
  }

  .page-about .ab-years__link:hover {
    border-left-color: var(--wd-green);
    border-bottom-color: transparent;
  }
}

/* ---------- 02 起点 ---------- */

.page-about .ab-origin {
  padding: 56px 0;
  background: var(--wd-gray-900);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-origin__grid {
  align-items: start;
  row-gap: 32px;
}

.page-about .ab-origin__figure {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .ab-origin {
    padding: 96px 0;
  }

  .page-about .ab-origin__copy {
    padding-right: 24px;
  }
}

/* ---------- 03 时间线 ---------- */

.page-about .ab-timeline {
  padding: 56px 0 60px;
  background-color: var(--wd-black);
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: 72px 72px;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-timeline__head {
  display: grid;
  gap: 12px;
  margin-bottom: 34px;
}

.page-about .ab-timeline__hint {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--wd-amber);
}

.page-about .ab-line {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 18px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--wd-red) transparent;
}

.page-about .ab-line::-webkit-scrollbar {
  height: 4px;
}

.page-about .ab-line::-webkit-scrollbar-thumb {
  background: var(--wd-red);
  border-radius: var(--r-pill);
}

.page-about .ab-line__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 0 0 80%;
  min-width: 252px;
  scroll-snap-align: start;
  padding: 22px 20px 20px;
  border-radius: var(--r-md);
  background: var(--wd-gray-900);
  border: 1px solid var(--line-dark);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .ab-line__item::before {
  content: "";
  position: absolute;
  top: 40px;
  left: -14px;
  width: 14px;
  height: 1px;
  background: var(--line-strong);
}

.page-about .ab-line__item:first-child::before {
  display: none;
}

.page-about .ab-line__item:hover {
  transform: translateY(-4px);
  border-color: var(--wd-blue);
}

.page-about .ab-line__num {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--wd-gray-600);
}

.page-about .ab-line__year {
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wd-green);
}

.page-about .ab-line__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--wd-white);
}

.page-about .ab-line__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .ab-line__more {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line-dark);
}

.page-about .ab-line__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--wd-blue);
  transition: color 0.2s var(--ease);
}

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

.page-about .ab-line__more summary::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-about .ab-line__more[open] summary::after {
  content: " –";
}

.page-about .ab-line__more summary:hover {
  color: var(--wd-white);
}

.page-about .ab-line__more p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-mid);
}

.page-about .ab-timeline__foot {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--text-dim);
}

@media (min-width: 720px) {
  .page-about .ab-timeline__head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .ab-line__item {
    flex: 0 0 316px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-timeline {
    padding: 92px 0 84px;
    background-size: 96px 96px;
  }
}

/* ---------- 04 团队 ---------- */

.page-about .ab-team {
  padding: 56px 0;
  background: var(--wd-gray-200);
  color: var(--wd-gray-900);
}

.page-about .ab-team .section__title {
  color: var(--wd-gray-900);
}

.page-about .ab-team .section__index {
  color: var(--wd-red);
}

.page-about .ab-team__head {
  display: grid;
  gap: 18px;
  margin-bottom: 34px;
}

.page-about .ab-team__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--wd-gray-600);
}

.page-about .ab-tree {
  display: grid;
  gap: 18px;
}

.page-about .ab-tree__trunk {
  padding: 24px 22px 26px;
  border-radius: var(--r-lg);
  background: var(--wd-black);
  border: 1px solid rgba(11, 12, 14, 0.18);
}

.page-about .ab-tree__trunk-label {
  display: block;
  margin-bottom: 14px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--wd-red-soft);
}

.page-about .ab-tree__trunk-name {
  margin: 0 0 14px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--wd-white);
}

.page-about .ab-tree__trunk-value {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0 0 12px;
}

.page-about .ab-tree__trunk-value .mono {
  font-size: 3.4rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--wd-green);
}

.page-about .ab-tree__trunk-unit {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .ab-tree__trunk-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

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

.page-about .ab-tree__branch {
  position: relative;
  padding: 20px 20px 22px 24px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(11, 12, 14, 0.1);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .ab-tree__branch-dot {
  position: absolute;
  top: 24px;
  left: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--wd-red);
}

.page-about .ab-tree__branch-title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--wd-gray-900);
}

.page-about .ab-tree__branch p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--wd-gray-600);
}

.page-about .ab-team__figure {
  margin: 30px 0 0;
}

.page-about .ab-team__figure .media-frame {
  border-color: rgba(11, 12, 14, 0.12);
  background: rgba(11, 12, 14, 0.06);
}

.page-about .ab-team__figure figcaption {
  color: var(--wd-gray-600);
}

@media (hover: hover) {
  .page-about .ab-tree__branches:hover .ab-tree__branch {
    opacity: 0.42;
  }

  .page-about .ab-tree__branches:hover .ab-tree__branch:hover {
    opacity: 1;
    transform: translateY(-3px);
    border-color: var(--wd-red);
  }
}

@media (min-width: 720px) {
  .page-about .ab-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 32px;
  }

  .page-about .ab-tree__branches {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .ab-team {
    padding: 76px 0;
  }
}

@media (min-width: 900px) {
  .page-about .ab-tree {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 42px;
    align-items: start;
  }

  .page-about .ab-tree__branches {
    position: relative;
    padding-left: 30px;
  }

  .page-about .ab-tree__branches::before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    bottom: 16px;
    width: 1px;
    background: linear-gradient(to bottom, var(--wd-red) 0%, rgba(224, 27, 47, 0.06) 100%);
  }

  .page-about .ab-team {
    padding: 96px 0;
  }
}

/* ---------- 05 档案 ---------- */

.page-about .ab-archive {
  padding: 56px 0;
  background: var(--wd-gray-900);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-archive__grid {
  row-gap: 34px;
  align-items: start;
}

.page-about .ab-archive__panel {
  display: grid;
  gap: 18px;
}

.page-about .ab-ledger {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-ledger__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 18px 20px;
  background: var(--wd-black);
}

.page-about .ab-ledger__value {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wd-green);
}

.page-about .ab-ledger__unit {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .ab-ledger__label {
  flex: 1 1 100%;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .ab-meter {
  height: 4px;
  border-radius: var(--r-pill);
  background: rgba(215, 218, 224, 0.14);
  overflow: hidden;
}

.page-about .ab-meter__fill {
  display: block;
  height: 100%;
  width: 78%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--wd-red), var(--wd-green));
}

.page-about .ab-archive__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

@media (min-width: 900px) {
  .page-about .ab-archive {
    padding: 96px 0;
  }

  .page-about .ab-archive__grid {
    column-gap: 48px;
  }
}

/* ---------- 06 本地 ---------- */

.page-about .ab-local {
  padding: 56px 0;
  background:
    radial-gradient(90% 70% at 0% 100%, rgba(224, 27, 47, 0.22), transparent 60%),
    var(--wd-black);
}

.page-about .ab-local__grid {
  row-gap: 32px;
  align-items: start;
}

.page-about .ab-local__figure {
  margin: 0;
}

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

.page-about .ab-local__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

@media (min-width: 900px) {
  .page-about .ab-local {
    padding: 96px 0;
  }

  .page-about .ab-local__grid {
    column-gap: 48px;
  }

  .page-about .ab-local__copy {
    padding-left: 8px;
  }
}

/* ---------- 07 原则 ---------- */

.page-about .ab-principles {
  padding: 56px 0 60px;
  background:
    linear-gradient(180deg, rgba(224, 27, 47, 0.1) 0%, transparent 46%),
    var(--wd-gray-900);
  border-top: 1px solid var(--line-dark);
}

.page-about .ab-principles__head {
  margin-bottom: 32px;
}

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

.page-about .ab-rule {
  position: relative;
  padding: 30px 24px 32px;
  border-radius: var(--r-lg);
  background: var(--wd-black);
  border: 1px solid var(--line-dark);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .ab-rule:hover {
  border-color: var(--wd-red);
  transform: translateY(-4px);
}

.page-about .ab-rule__num {
  display: block;
  margin-bottom: 16px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--wd-red-soft);
}

.page-about .ab-rule__title {
  margin: 0 0 12px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--wd-white);
}

.page-about .ab-rule p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-mid);
}

@media (min-width: 860px) {
  .page-about .ab-principles {
    padding: 92px 0 96px;
  }

  .page-about .ab-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 08 收尾 ---------- */

.page-about .ab-cta {
  padding: 0 0 64px;
  background: var(--wd-gray-900);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 20px;
  padding: 30px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-dark);
  background:
    linear-gradient(120deg, rgba(224, 27, 47, 0.22), rgba(11, 12, 14, 0) 62%),
    var(--wd-black);
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 54ch;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--wd-white);
}

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

@media (min-width: 780px) {
  .page-about .ab-cta {
    padding: 0 0 88px;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 36px 34px;
  }
}
</style>
<<<END>>>
请不要在最终回答里包含 `</style>` 标签。它只是我在上一步里加的分隔符。你的最终输出必须在 `` 之后直接以 CSS 结束，不要包含任何额外的标签或结束符。