.page-about .breadcrumb {
  padding: 18px 0 6px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 26px;
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__body {
  position: relative;
  padding-left: 16px;
}

.page-about .about-hero__body::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 2px;
  height: 66px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 208, 0));
}

.page-about .about-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(26px, 5.6vw, 44px);
  line-height: 1.18;
  letter-spacing: .02em;
  font-weight: 900;
}

.page-about .about-hero .lead {
  margin: 0 0 22px;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

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

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

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 6fr) minmax(0, 7fr);
    align-items: center;
    gap: 48px;
    padding: 48px 0 46px;
  }
}

/* ---------- 事实条 ---------- */
.page-about .fact-strip {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .fact-strip__item {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .fact-strip__item::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  opacity: .45;
}

.page-about .fact-strip__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .fact-strip__label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

@media (min-width: 768px) {
  .page-about .fact-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 非对称外壳 ---------- */
.page-about .shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 34px;
  padding-bottom: 64px;
}

@media (min-width: 1024px) {
  .page-about .shell {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: 48px;
    padding-top: 52px;
  }
}

/* ---------- 章节索引 ---------- */
.page-about .index-rail {
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .index-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .index-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .index-rail__list::-webkit-scrollbar {
  height: 4px;
}

.page-about .index-rail__list::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .index-rail__list > li {
  flex: 0 0 auto;
}

.page-about .index-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .index-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-about .index-rail__link:hover {
  color: var(--text);
  border-color: var(--cyan);
}

.page-about .index-rail__link.is-active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 229, 208, .08);
}

.page-about .index-rail__link.is-active .index-rail__num {
  color: var(--cyan);
}

@media (min-width: 1024px) {
  .page-about .index-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 20px 18px;
    background: rgba(20, 29, 49, .55);
    backdrop-filter: blur(10px);
  }

  .page-about .index-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .index-rail__list > li {
    flex: 1 1 auto;
  }

  .page-about .index-rail__link {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    white-space: normal;
    border: 0;
    border-left: 2px solid var(--line);
    background: transparent;
  }

  .page-about .index-rail__link:hover {
    border-left-color: var(--cyan);
    background: rgba(0, 229, 208, .05);
  }

  .page-about .index-rail__link.is-active {
    border-left-color: var(--cyan);
    background: rgba(0, 229, 208, .08);
  }
}

/* ---------- 章节节奏 ---------- */
.page-about .section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-about .about-flow > .section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-about .section__head {
  margin-bottom: 24px;
}

.page-about .section__title {
  margin: 8px 0 10px;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.3;
  letter-spacing: .02em;
  font-weight: 800;
}

.page-about .section__note {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 定位 ---------- */
.page-about .duo {
  display: grid;
  gap: 16px;
}

.page-about .card {
  padding: 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .card__title {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: .01em;
}

.page-about .card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .position-lead {
  margin: 24px 0 0;
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .position-note {
  margin: 18px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--cyan);
  background: rgba(0, 229, 208, .05);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

@media (min-width: 720px) {
  .page-about .duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 18px 0 18px 26px;
  border-left: 1px solid var(--line);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .timeline__item:last-child::before {
  background: var(--cyan);
}

.page-about .timeline__era {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .timeline__title {
  margin: 8px 0 8px;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: .01em;
}

.page-about .timeline__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 768px) {
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
    padding: 26px 0 26px 34px;
  }

  .page-about .timeline__item::before {
    top: 32px;
  }

  .page-about .timeline__era {
    padding-top: 3px;
    text-align: right;
  }

  .page-about .timeline__title {
    margin-top: 0;
  }
}

/* ---------- 服务对比表 ---------- */
.page-about .compare {
  overflow-x: auto;
  border: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

.page-about .compare__caption {
  padding: 14px 18px 0;
  text-align: left;
  font-size: 13px;
  color: var(--muted);
}

.page-about .compare__table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .compare__table th,
.page-about .compare__table td {
  padding: 16px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.page-about .compare__table tbody tr:last-child th,
.page-about .compare__table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .compare__table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  font-weight: 500;
  color: var(--muted);
  background: var(--ink);
}

.page-about .compare__dim {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.page-about .compare__col--us {
  background: rgba(0, 229, 208, .07);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: var(--text);
}

.page-about .compare__table thead .compare__col--us {
  color: var(--cyan);
  border-top: 2px solid var(--cyan);
}

/* ---------- 团队与资质 ---------- */
.page-about .team {
  display: grid;
  gap: 26px;
}

.page-about .team__list {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20, 29, 49, .92), rgba(11, 18, 32, .92));
}

.page-about .team-card__num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .team-card__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .credential-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .credential {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(242, 200, 121, .38);
  background: rgba(242, 200, 121, .07);
  color: var(--gold);
  font-size: 13px;
  letter-spacing: .02em;
}

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

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

@media (min-width: 960px) {
  .page-about .team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
    align-items: start;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .ecosystem {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-about .ecosystem__media {
  position: absolute;
  inset: 0;
}

.page-about .ecosystem__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .28;
}

.page-about .ecosystem__inner {
  position: relative;
  padding: 24px 20px 20px;
}

.page-about .ecosystem__lead {
  margin: 0 0 22px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .honor-row {
  list-style: none;
  margin: 0;
  padding: 2px 2px 12px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .honor-row::-webkit-scrollbar {
  height: 5px;
}

.page-about .honor-row::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .honor-card {
  flex: 0 0 258px;
  scroll-snap-align: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: rgba(11, 18, 32, .86);
  backdrop-filter: blur(6px);
}

.page-about .honor-card__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text);
}

.page-about .honor-card__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 768px) {
  .page-about .ecosystem__inner {
    padding: 40px 36px 32px;
  }
}

/* ---------- 服务承诺 ---------- */
.page-about .promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .promise-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--ink);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-about .promise-item:hover {
  border-color: rgba(0, 229, 208, .45);
  transform: translateY(-2px);
}

.page-about .promise-item__idx {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .promise-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.45;
}

.page-about .promise-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */
.page-about .next-step {
  display: grid;
  gap: 18px;
  margin-top: 36px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  background: var(--panel);
}

.page-about .next-step h2 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.4;
  letter-spacing: .02em;
}

.page-about .next-step p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .next-step__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 720px) {
  .page-about .next-step {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
    padding: 28px 32px;
  }
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__body {
    padding-left: 12px;
  }

  .page-about .team-card {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 12px;
    padding: 16px;
  }

  .page-about .team-card__num {
    font-size: 22px;
  }

  .page-about .promise-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .honor-card {
    flex: 0 0 78%;
  }

  .page-about .fact-strip__value {
    font-size: 21px;
  }
}
<<<END>>>