/* ===== 品牌使命 / page-about ===== */
.page-about {
  --about-line: rgba(110, 132, 121, .32);
  --about-line-soft: rgba(110, 132, 121, .16);
}

.page-about .about-crumb-sep {
  margin: 0 8px;
  color: var(--brick);
}

/* ---------- 框景首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 16px;
  padding: clamp(20px, 3vw, 36px) clamp(16px, 3vw, 34px);
  background:
    radial-gradient(120% 100% at 10% 0%, rgba(61, 242, 208, .09), transparent 58%),
    radial-gradient(90% 120% at 100% 100%, rgba(154, 107, 255, .12), transparent 62%),
    linear-gradient(180deg, #16342A, #0E1F19);
  overflow: hidden;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  max-width: 22ch;
}

.page-about .about-hero__sub {
  margin: 14px 0 0;
  max-width: 56ch;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
}

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

.page-about .about-fact dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mute);
  text-transform: uppercase;
}

.page-about .about-fact dd {
  margin: 6px 0 0;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.1;
  color: var(--ice);
}

.page-about .about-hero__side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--hair);
  min-width: 0;
}

.page-about .about-hero__side .bx-note {
  margin: 0;
}

.page-about .about-hero__side .bx-btn {
  margin-top: 4px;
}

/* ---------- 使命与定位 ---------- */
.page-about .about-mission__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-mission__lede {
  margin: 14px 0 0;
}

.page-about .about-mission__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-mission__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line-soft);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ice);
}

.page-about .about-mission__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--brick);
}

.page-about .about-mission__list strong {
  margin-right: 6px;
  color: var(--cyan);
  font-weight: 700;
}

.page-about .about-mission__foot {
  margin: 18px 0 0;
}

.page-about .about-mission__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--hair);
  min-width: 0;
}

.page-about .about-mission__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

/* ---------- 版本路线 + 内容原则 ---------- */
.page-about .about-ledger {
  position: relative;
  isolation: isolate;
}

.page-about .about-ledger__backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.page-about .about-ledger__backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  filter: saturate(.55) brightness(.72);
}

.page-about .about-ledger__backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 15, 13, .68), rgba(11, 15, 13, .9) 55%, rgba(11, 15, 13, .97));
}

.page-about .about-ledger__grid {
  display: grid;
  gap: 38px;
}

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

.page-about .about-axis {
  list-style: none;
  position: relative;
  margin: 22px 0 0;
  padding: 0 0 0 20px;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--brick) 0%, rgba(226, 84, 42, .16) 100%);
}

.page-about .about-axis__item {
  position: relative;
  margin-bottom: 12px;
}

.page-about .about-axis__item:last-child {
  margin-bottom: 0;
}

.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 16px;
  width: 12px;
  height: 2px;
  background: var(--brick);
}

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

.page-about .about-node__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  background: rgba(11, 15, 13, .74);
  border: 1px solid var(--about-line);
  cursor: pointer;
  list-style: none;
  transition: border-color 180ms ease, transform 180ms ease, background-color 180ms ease;
}

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

.page-about .about-node__head:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
  background: rgba(23, 53, 43, .92);
}

.page-about .about-node__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-node__ver {
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-node__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ice);
}

.page-about .about-node__mark {
  flex: none;
  margin-left: auto;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--mute);
  border-bottom: 1px solid var(--mute);
  transform: rotate(45deg);
  transition: transform 180ms ease;
}

.page-about .about-node[open] > .about-node__head .about-node__mark {
  transform: rotate(-135deg);
}

.page-about .about-node__body {
  padding: 12px 13px 14px;
  border: 1px solid var(--about-line);
  border-top: 0;
  background: rgba(16, 37, 30, .82);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .86;
}

.page-about .about-axis__foot {
  margin: 18px 0 0;
}

.page-about .about-ledger__cards {
  position: relative;
  min-width: 0;
}

.page-about .about-cards__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .07;
  pointer-events: none;
}

.page-about .about-ledger__cards > *:not(.about-cards__grid) {
  position: relative;
  z-index: 1;
}

.page-about .about-cards {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-card {
  position: relative;
  min-width: 0;
  padding: 18px 16px 16px;
  border: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(23, 53, 43, .88), rgba(16, 37, 30, .94));
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-card__no {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--brick);
}

.page-about .about-card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ice);
}

.page-about .about-card__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .84;
}

.page-about .about-card__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan);
  transition: max-height 200ms ease, opacity 200ms ease, margin-top 200ms ease;
}

.page-about .about-card:hover .about-card__more,
.page-about .about-card:focus-within .about-card__more {
  max-height: 90px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 三层校对 ---------- */
.page-about .about-check__lede {
  margin: 14px 0 0;
  max-width: 62ch;
}

.page-about .about-check__flow {
  list-style: none;
  display: grid;
  gap: 18px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-check__step {
  position: relative;
  min-width: 0;
  padding: 18px 18px 20px 22px;
  border: 1px solid var(--about-line);
  background: rgba(16, 37, 30, .62);
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-about .about-check__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-pressure);
}

.page-about .about-check__step:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-check__step .bx-h3 {
  margin: 14px 0 8px;
}

.page-about .about-check__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .84;
}

.page-about .about-check__meter {
  margin-top: 16px;
}

.page-about .about-check__foot {
  margin: 22px 0 0;
  max-width: 70ch;
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__lede {
  margin: 14px 0 0;
  max-width: 62ch;
}

.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-team__col {
  min-width: 0;
  padding: 20px 18px 18px;
  border: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(23, 53, 43, .78), rgba(16, 37, 30, .92));
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-about .about-team__col:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-team__col .bx-h3 {
  margin: 0 0 10px;
}

.page-about .about-team__duty {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .84;
}

.page-about .about-team__out {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-line);
}

/* ---------- 服务地区与联络 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: 26px;
}

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

.page-about .about-region__text p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .86;
}

.page-about .about-region__text .bx-btn {
  margin-top: 22px;
}

.page-about .about-region__card {
  min-width: 0;
  padding: 22px 20px;
}

.page-about .about-region__cardlabel {
  color: var(--brick);
}

.page-about .about-region__card .bx-contact {
  margin: 16px 0 0;
}

.page-about .about-region__card .bx-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(11, 15, 13, .16);
}

.page-about .about-region__card .bx-contact__key {
  font-size: 11px;
  letter-spacing: .14em;
  color: #5C6B62;
}

.page-about .about-region__card .bx-contact__val {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-region__note {
  margin: 16px 0 0;
  color: #4D5C55;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-card:nth-child(even) {
    margin-top: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 34px;
    align-items: end;
  }

  .page-about .about-hero__side {
    padding-top: 0;
    padding-left: 24px;
    border-top: 0;
    border-left: 1px solid var(--hair);
  }

  .page-about .about-check__flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 42px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-mission__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 42px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-ledger__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-about .about-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-card:nth-child(even) {
    margin-top: 0;
  }

  .page-about .about-card:nth-child(2),
  .page-about .about-card:nth-child(5) {
    margin-top: 28px;
  }

  .page-about .about-card:nth-child(3),
  .page-about .about-card:nth-child(6) {
    margin-top: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__head,
  .page-about .about-card,
  .page-about .about-check__step,
  .page-about .about-team__col,
  .page-about .about-card__more,
  .page-about .about-node__mark {
    transition: none;
  }

  .page-about .about-node__head:hover,
  .page-about .about-card:hover,
  .page-about .about-card:focus-within,
  .page-about .about-check__step:hover,
  .page-about .about-team__col:hover {
    transform: none;
  }
}
<<<END>>>