/* ===== 品牌中心 · 页面专属样式（作用域 .page-about） ===== */

.page-about {
  --ab-line: rgba(0, 201, 167, .38);
  --ab-line-soft: rgba(255, 255, 255, .14);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  background: var(--navy);
  color: var(--white);
  padding: calc(var(--header-h) + 28px) 0 132px;
}

.page-about .ab-hero__beam {
  position: absolute;
  inset: -10% -20% auto auto;
  width: 78%;
  height: 150%;
  background:
    linear-gradient(114deg,
      transparent 44%,
      rgba(0, 201, 167, .16) 44%,
      rgba(0, 201, 167, .16) 58%,
      transparent 58%),
    linear-gradient(114deg,
      transparent 62%,
      rgba(255, 106, 26, .17) 62%,
      rgba(255, 106, 26, .17) 74%,
      transparent 74%),
    radial-gradient(circle at 82% 24%, rgba(108, 77, 255, .26), transparent 58%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 84px;
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 6%, 100% 100%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

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

.page-about .ab-hero__crumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .02em;
}

.page-about .ab-hero__crumbs li {
  color: rgba(255, 255, 255, .62);
}

.page-about .ab-hero__crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(255, 255, 255, .35);
}

.page-about .ab-hero__crumbs a {
  color: rgba(255, 255, 255, .8);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .ab-hero__crumbs a:hover,
.page-about .ab-hero__crumbs a:focus-visible {
  color: var(--orange);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
  align-items: end;
}

.page-about .ab-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(1.95rem, 6.2vw, 3.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.01em;
  max-width: 20ch;
}

.page-about .ab-hero__lead {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, .8);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  padding-top: 24px;
  border-top: 1px solid var(--ab-line-soft);
}

.page-about .ab-hero__stats .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  letter-spacing: -.02em;
}

.page-about .ab-hero__stats .stat-label {
  display: block;
  margin-top: 8px;
  font-size: .8125rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, .68);
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-bottom: 168px;
  }
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    gap: 64px;
  }
}

/* ---------- 通用区块头微调 ---------- */
.page-about .section-head {
  margin-bottom: 34px;
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--orange);
  margin: 0 0 10px;
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(1.45rem, 3.6vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--navy);
}

.page-about .section-desc {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 01 时间线 ---------- */
.page-about .ab-arc {
  background: var(--paper);
  padding-top: 12px;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 34px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal), var(--violet) 62%, rgba(108, 77, 255, .1));
}

.page-about .ab-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding-bottom: 30px;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--teal);
  transition: border-color .25s var(--ease), background-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .ab-timeline__item:hover::before,
.page-about .ab-timeline__item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.12);
}

.page-about .ab-timeline__year {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--slate);
  transition: color .25s var(--ease);
}

.page-about .ab-timeline__item:hover .ab-timeline__year {
  color: var(--orange);
}

.page-about .ab-timeline__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--navy);
}

.page-about .ab-timeline__body p {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
}

@media (min-width: 780px) {
  .page-about .ab-arc {
    padding-top: 34px;
  }
  .page-about .ab-timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 30px;
    padding-bottom: 36px;
  }
  .page-about .ab-timeline__year {
    font-size: 1.75rem;
    text-align: left;
  }
  .page-about .ab-timeline__item::before {
    top: 10px;
  }
}

/* ---------- 02 团队 ---------- */
.page-about .ab-team {
  background: var(--white);
}

.page-about .ab-team__intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

.page-about .ab-team__media {
  border-radius: 2px;
}

.page-about .ab-team__media img,
.page-about .ab-flow__media img,
.page-about .ab-collab__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-team__note p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .ab-team__note p + p {
  margin-top: 14px;
  color: var(--slate);
}

.page-about .ab-team__note .eyebrow {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-about .ab-team__panel {
  margin-top: 40px;
}

.page-about .ab-team__panel .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.page-about .ab-team__panel .filter-btn {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .02em;
  padding: 9px 16px;
  border: 1px solid rgba(11, 30, 58, .18);
  background: var(--white);
  color: var(--navy);
  border-radius: 2px;
  cursor: pointer;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .ab-team__panel .filter-btn:hover,
.page-about .ab-team__panel .filter-btn:focus-visible {
  border-color: var(--violet);
  color: var(--violet);
}

.page-about .ab-team__panel .filter-btn[aria-pressed="true"] {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .ab-team-card {
  position: relative;
  padding: 28px 22px 24px;
  background: var(--paper);
  border-left: 3px solid var(--teal);
  box-shadow: var(--shadow-panel);
}

.page-about .ab-team-card__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  margin-bottom: 14px;
}

.page-about .ab-team-card .card-title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .ab-team-card .card-note {
  margin: 0;
  font-size: .9125rem;
  line-height: 1.75;
  color: var(--slate);
}

@media (min-width: 820px) {
  .page-about .ab-team__intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }
  .page-about .ab-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 03 四道工序 ---------- */
.page-about .ab-flow {
  background: var(--navy-deep);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-about .ab-flow::before {
  content: "";
  position: absolute;
  top: -60px;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--teal), var(--violet) 55%, var(--orange));
  transform: rotate(-2deg);
  transform-origin: left center;
  opacity: .85;
}

.page-about .ab-flow .section-title {
  color: var(--white);
}

.page-about .ab-flow .section-desc {
  color: rgba(255, 255, 255, .72);
}

.page-about .ab-flow .section-index {
  color: var(--teal);
}

.page-about .ab-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

.page-about .ab-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-flow__item {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 18px;
}

.page-about .ab-flow__item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 30px;
  bottom: 0;
  width: 2px;
  background: var(--ab-line);
}

.page-about .ab-flow__dot {
  width: 14px;
  height: 14px;
  margin-top: 17px;
  border-radius: 50%;
  background: var(--navy-deep);
  border: 3px solid var(--teal);
  box-sizing: content-box;
  position: relative;
  z-index: 1;
}

.page-about .ab-flow__detail {
  border-bottom: 1px solid var(--ab-line-soft);
  padding-bottom: 16px;
}

.page-about .ab-flow__detail summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 4px 26px 4px 0;
  position: relative;
}

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

.page-about .ab-flow__detail summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--teal);
  transition: transform .25s var(--ease), color .25s var(--ease);
}

.page-about .ab-flow__detail[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .ab-flow__detail summary:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

.page-about .ab-flow__no {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-about .ab-flow__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-flow__detail p {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: .9125rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, .74);
}

.page-about .ab-flow__media {
  max-width: 420px;
  margin: 0 auto;
}

@media (min-width: 940px) {
  .page-about .ab-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: 60px;
    align-items: center;
  }
  .page-about .ab-flow__media {
    margin: 0;
    max-width: none;
  }
}

/* ---------- 斜切分隔带 ---------- */
.page-about .slant-band {
  display: block;
  height: 46px;
  background: linear-gradient(100deg, var(--navy) 0%, var(--navy) 46%, var(--white) 46%, var(--white) 100%);
  clip-path: polygon(0 32%, 100% 0, 100% 100%, 0 100%);
}

.page-about .slant-band--rev {
  height: 42px;
  background: linear-gradient(100deg, var(--white) 0%, var(--white) 38%, var(--paper) 38%, var(--paper) 100%);
  clip-path: polygon(0 0, 100% 44%, 100% 100%, 0 100%);
}

@media (max-width: 640px) {
  .page-about .slant-band,
  .page-about .slant-band--rev {
    height: 28px;
  }
}

/* ---------- 04 协作生态 ---------- */
.page-about .ab-collab {
  background: var(--white);
}

.page-about .ab-collab__media {
  margin-bottom: 34px;
}

.page-about .ab-collab__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
}

.page-about .ab-collab__facts li {
  padding: 20px 18px;
  background: var(--paper);
  border-top: 3px solid var(--yellow);
}

.page-about .ab-collab__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
  letter-spacing: -.02em;
}

.page-about .ab-collab__label {
  display: block;
  margin-top: 10px;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .ab-collab__foot {
  margin: 30px 0 0;
  max-width: 68ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--ink);
}

@media (min-width: 780px) {
  .page-about .ab-collab__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }
}

/* ---------- 05 三条规矩 ---------- */
.page-about .ab-values {
  background: var(--paper);
}

.page-about .ab-values__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-values__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 24px 20px;
  background: var(--white);
  border-left: 3px solid var(--teal);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .ab-values__item:hover {
  border-color: var(--orange);
  transform: translateX(4px);
}

.page-about .ab-values__no {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--violet);
}

.page-about .ab-values__body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .ab-values__body p {
  margin: 0;
  max-width: 62ch;
  font-size: .9125rem;
  line-height: 1.78;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .ab-values__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
  .page-about .ab-values__item {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 30px 24px;
  }
}

/* ---------- 下一段路 ---------- */
.page-about .ab-next {
  background: var(--paper);
}

.page-about .ab-next__panel {
  position: relative;
  background: var(--navy);
  color: var(--white);
  padding: 38px 24px;
  overflow: hidden;
}

.page-about .ab-next__panel::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(0, 201, 167, .3), transparent 68%);
  pointer-events: none;
}

.page-about .ab-next__panel .eyebrow {
  position: relative;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--yellow);
  margin: 0 0 14px;
}

.page-about .ab-next__title {
  position: relative;
  margin: 0 0 22px;
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.34;
  color: var(--white);
}

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

.page-about .ab-next__list li {
  padding-left: 22px;
  position: relative;
  font-size: .9125rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, .8);
}

.page-about .ab-next__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 2px;
  background: var(--teal);
}

.page-about .ab-next__foot {
  position: relative;
  margin: 24px 0 26px;
  font-size: .9125rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, .66);
}

@media (min-width: 760px) {
  .page-about .ab-next__panel {
    padding: 52px 48px;
  }
  .page-about .ab-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 32px;
  }
}

/* ---------- 行动色带 ---------- */
.page-about .ab-cta {
  position: relative;
  background: var(--orange);
  color: var(--navy-deep);
  padding: 52px 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 26px));
}

.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

.page-about .ab-cta__copy h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--navy-deep);
}

.page-about .ab-cta__copy p {
  margin: 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(5, 15, 31, .82);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .ab-cta__outline {
  border: 2px solid var(--navy-deep);
  background: transparent;
  color: var(--navy-deep);
}

.page-about .ab-cta__outline:hover,
.page-about .ab-cta__outline:focus-visible {
  background: var(--navy-deep);
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .ab-cta {
    padding: 68px 0;
  }
  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .6fr);
    gap: 48px;
  }
  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }
}
<<<END>>>