.page-about {
  --about-rail: 112px;
  --about-shadow: 6px 6px 0 rgba(0, 0, 0, .5);
  --about-line: 1px solid var(--steel);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  margin: clamp(18px, 3vw, 30px) 0 0;
}

/* ---------- 章节编号 ---------- */
.page-about .sec-num {
  font-family: var(--font-serif);
  font-size: 24px;
  line-height: 1;
  color: var(--violet);
  margin-right: 10px;
  vertical-align: -2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
  padding-block: clamp(26px, 4.5vw, 56px) clamp(30px, 5vw, 64px);
}

.page-about .about-intro__title {
  margin: 0;
  font-size: clamp(29px, 5.2vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  max-width: 14em;
}

.page-about .about-intro__lede {
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-facts {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--steel);
  border: var(--about-line);
  align-self: start;
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  background: var(--panel);
}

.page-about .about-fact__k {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
}

.page-about .about-fact__v {
  margin: 0;
  color: var(--cyan);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

@media (min-width: 960px) {
  .page-about .about-intro {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, .85fr);
    grid-template-areas:
      "eyebrow facts"
      "title   facts"
      "lede    facts";
    column-gap: clamp(32px, 5vw, 76px);
    row-gap: clamp(12px, 1.6vw, 20px);
    align-items: start;
  }
  .page-about .about-intro__eyebrow { grid-area: eyebrow; }
  .page-about .about-intro__title { grid-area: title; }
  .page-about .about-intro__lede { grid-area: lede; }
  .page-about .about-facts { grid-area: facts; }
}

/* ---------- 章节标题组 ---------- */
.page-about .sec-head {
  display: grid;
  gap: 12px;
  max-width: 74ch;
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.006em;
}

.page-about .sec-head .lede {
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: clamp(15.5px, 1.6vw, 16.5px);
  line-height: 1.8;
}

/* ---------- 沿革配图 ---------- */
.page-about .about-strip {
  margin: 0 0 clamp(26px, 3.6vw, 44px);
  aspect-ratio: 7 / 4;
  border: var(--about-line);
  background: var(--plum);
}

.page-about .about-strip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 38px);
  align-items: stretch;
}

.page-about .tl-year {
  position: relative;
  padding: 6px 22px 0 0;
  text-align: right;
  border-right: 1px solid var(--steel);
}

.page-about .tl-year span {
  color: var(--paper);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .tl-year::after {
  content: "";
  position: absolute;
  top: 14px;
  right: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 230, 211, .14);
}

.page-about .tl-item:last-child .tl-year::after {
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(122, 92, 255, .2);
}

.page-about .tl-body {
  background: var(--panel);
  border: var(--about-line);
  box-shadow: var(--about-shadow);
  padding: clamp(16px, 2.2vw, 26px) clamp(18px, 2.4vw, 30px);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .tl-item:hover .tl-body,
.page-about .tl-item:focus-within .tl-body {
  border-color: rgba(34, 230, 211, .55);
  transform: translateX(4px);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.42;
}

.page-about .tl-body p {
  margin: 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.78;
}

@media (max-width: 720px) {
  .page-about .tl-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }
  .page-about .tl-year {
    text-align: left;
    padding: 0 0 0 18px;
    border-right: 0;
    border-left: 1px solid var(--steel);
  }
  .page-about .tl-year::after {
    right: auto;
    left: -5px;
    top: 8px;
  }
  .page-about .tl-body {
    box-shadow: 4px 4px 0 rgba(0, 0, 0, .5);
  }
  .page-about .tl-item:hover .tl-body { transform: none; }
}

/* ---------- 团队网格 ---------- */
.page-about .team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--steel);
  border: var(--about-line);
}

@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .team-grid {
    grid-template-columns: repeat(auto-fit, minmax(226px, 1fr));
  }
}

.page-about .team-card {
  background: var(--panel);
  padding: clamp(18px, 2.4vw, 28px);
  display: grid;
  gap: 10px;
  align-content: start;
  transition: background-color .22s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  background: var(--plum);
}

.page-about .team-card__idx {
  margin: 0;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.page-about .team-card h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
}

.page-about .team-card__text {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 转场带 ---------- */
.page-about .about-band {
  padding-block: clamp(30px, 5vw, 64px);
}

.page-about .about-band__media {
  margin: 0;
  aspect-ratio: 16 / 9;
  border: var(--about-line);
  background: var(--plum);
}

.page-about .about-band__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-band__note {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--violet);
  max-width: 64ch;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.78;
}

/* ---------- 版本节奏 ---------- */
.page-about .release-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--steel);
  border: var(--about-line);
}

@media (min-width: 880px) {
  .page-about .release-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .release-stat {
  background: var(--panel);
  padding: clamp(16px, 2.4vw, 26px);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .release-stat__v {
  margin: 0;
  color: var(--cyan);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .release-stat__k {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.55;
}

.page-about .release-notes {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  margin-top: clamp(24px, 3.4vw, 40px);
}

@media (min-width: 880px) {
  .page-about .release-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .release-note {
  border-top: 1px solid var(--steel);
  padding-top: 16px;
}

.page-about .release-note h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .release-note p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.74;
}

.page-about .release-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 211, .4);
}

.page-about .release-note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 问题跟进 ---------- */
.page-about .compat-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 48px);
}

@media (min-width: 900px) {
  .page-about .compat-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
  .page-about .compat-media {
    margin-top: clamp(10px, 2vw, 28px);
  }
  .page-about .compat-text {
    margin-top: clamp(28px, 5vw, 72px);
  }
}

.page-about .compat-media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: var(--about-line);
  background: var(--plum);
  box-shadow: -4px 0 0 rgba(34, 230, 211, .3), 4px 0 0 rgba(255, 75, 43, .26);
}

.page-about .compat-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .compat-text h2 {
  margin: 8px 0 12px;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.2;
}

.page-about .compat-text > p {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .compat-steps {
  list-style: none;
  counter-reset: cs;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .compat-steps li {
  counter-increment: cs;
  position: relative;
  padding-left: 46px;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.76;
}

.page-about .compat-steps li::before {
  content: "0" counter(cs);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border: 1px solid var(--steel);
  padding: 3px 6px;
}

.page-about .compat-link {
  margin-top: 22px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.74;
}

.page-about .compat-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 211, .4);
}

.page-about .compat-link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 办公地点 ---------- */
.page-about .place-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
}

@media (min-width: 900px) {
  .page-about .place-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }
}

.page-about .place-list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--steel);
  border: var(--about-line);
  align-content: start;
}

.page-about .place-list > div {
  display: grid;
  gap: 6px;
  padding: 15px 18px;
  background: var(--panel);
}

.page-about .place-list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .place-list dd {
  margin: 0;
  color: var(--paper);
  font-size: 15.5px;
  line-height: 1.66;
  word-break: break-word;
}

.page-about .place-map {
  position: relative;
  min-height: 230px;
  aspect-ratio: 4 / 3;
  border: var(--about-line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .place-map svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* ---------- 收束行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 16px;
  border: var(--about-line);
  background: linear-gradient(118deg, rgba(34, 230, 211, .09), rgba(122, 92, 255, .11) 58%, transparent);
}

.page-about .about-cta p {
  margin: 0;
  color: var(--paper);
  font-size: 16px;
  line-height: 1.7;
}

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-body,
  .page-about .team-card {
    transition: none;
  }
  .page-about .tl-item:hover .tl-body {
    transform: none;
  }
}
</PAGE_CSS>>>