.page-about {
  --about-cut: 26px;
  --about-cut-sm: 16px;
  background:
    radial-gradient(circle at 82% 6%, rgba(47, 243, 208, 0.14), transparent 46%),
    radial-gradient(circle at 4% 46%, rgba(124, 108, 255, 0.12), transparent 42%),
    var(--ink);
  color: var(--white);
  font-family: var(--font-sans);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .about-crumb,
.page-about .about-hero,
.page-about .about-section {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 4vw, 30px);
}

.page-about .breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(255, 255, 255, 0.32);
}

.page-about .breadcrumb a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 208, 0.4);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  padding-block: clamp(26px, 5vw, 48px) clamp(40px, 7vw, 84px);
}

.page-about .about-hero h1 {
  margin: 12px 0 18px;
  font-size: clamp(38px, 8vw, 78px);
  line-height: 0.98;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-lede {
  max-width: 44ch;
  margin: 0 0 26px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 28px;
  padding: 0;
  background: rgba(47, 243, 208, 0.22);
  border: 1px solid rgba(47, 243, 208, 0.22);
}

.page-about .about-fact {
  background: var(--ink-700);
  padding: 14px 16px 16px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.2vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.66);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid rgba(47, 243, 208, 0.28);
  background: var(--ink-700);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-about .media-frame {
  margin: 0;
  position: relative;
  background: var(--ink-700);
}

.page-about .media-frame img {
  width: 100%;
}

.page-about .media-frame__caption {
  padding: 12px 4px 0;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.58);
}

.page-about .about-hero__figure .media-frame__caption {
  padding: 12px 18px 18px;
  background: rgba(4, 29, 24, 0.72);
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: clamp(34px, 6vw, 62px);
  border-top: 1px solid rgba(216, 208, 191, 0.16);
}

.page-about .section-title {
  margin: 10px 0 14px;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: 0.015em;
  color: var(--white);
}

.page-about .about-section__sub {
  max-width: 52ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-section__head {
  margin-bottom: clamp(24px, 4vw, 38px);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  border-top: none;
}

.page-about .about-origin__text p {
  max-width: 46ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.8);
}

.page-about .about-note {
  background: var(--cream);
  color: var(--brown);
  padding: 22px 22px 24px;
  border-left: 4px solid var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut-sm)), calc(100% - var(--about-cut-sm)) 100%, 0 100%);
}

.page-about .about-note__label {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brown);
}

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

.page-about .about-note__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #3a332b;
}

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--red);
  transform: skewX(-18deg);
}

/* ---------- 时间轴 ---------- */
.page-about .era-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .era-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .era-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid rgba(47, 243, 208, 0.36);
  border-radius: 999px;
  background: rgba(47, 243, 208, 0.06);
  color: var(--cyan-soft);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .era-chip:hover {
  background: rgba(47, 243, 208, 0.16);
}

.page-about .era-radio:checked + .era-chip {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .era-radio:focus-visible + .era-chip {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

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

.page-about .era-item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .era-year {
  position: relative;
  display: block;
  padding-left: 12px;
  border-left: 2px solid rgba(47, 243, 208, 0.5);
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.6vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .era-card {
  position: relative;
  padding: 16px 18px 18px;
  background: var(--ink-700);
  border: 1px solid rgba(47, 243, 208, 0.16);
  border-left: 3px solid rgba(47, 243, 208, 0.22);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut-sm)), calc(100% - var(--about-cut-sm)) 100%, 0 100%);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .era-item:hover .era-card {
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .era-card h3 {
  margin: 10px 0 8px;
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .era-card p {
  margin: 0;
  max-width: 48ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .tag {
  display: inline-block;
  padding: 3px 9px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  border-radius: 2px;
}

.page-about .tag--cyan {
  background: rgba(47, 243, 208, 0.16);
  color: var(--cyan);
  border: 1px solid rgba(47, 243, 208, 0.36);
}

.page-about .tag--violet {
  background: rgba(124, 108, 255, 0.2);
  color: #cfc8ff;
  border: 1px solid rgba(124, 108, 255, 0.5);
}

.page-about .tag--orange {
  background: rgba(255, 138, 61, 0.18);
  color: var(--orange);
  border: 1px solid rgba(255, 138, 61, 0.42);
}

.page-about .era-chips:has(#era-early:checked) ~ .era-tracks .era-item:not(.era-item--start):not(.era-item--data),
.page-about .era-chips:has(#era-web:checked) ~ .era-tracks .era-item:not(.era-item--web),
.page-about .era-chips:has(#era-lib:checked) ~ .era-tracks .era-item:not(.era-item--video),
.page-about .era-chips:has(#era-live:checked) ~ .era-tracks .era-item:not(.era-item--compare):not(.era-item--refresh) {
  display: none;
}

.page-about .about-timeline__figure {
  margin-top: clamp(24px, 4vw, 36px);
  border: 1px solid rgba(47, 243, 208, 0.22);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-timeline__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-timeline__figure .media-frame__caption {
  padding: 12px 18px 16px;
  background: rgba(4, 29, 24, 0.78);
  color: rgba(255, 255, 255, 0.66);
}

/* ---------- 校验流程 ---------- */
.page-about .check-flow {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 38px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .check-step {
  position: relative;
  padding: 20px 20px 22px;
  background: linear-gradient(150deg, rgba(11, 59, 49, 0.96), rgba(6, 42, 35, 0.96));
  border-top: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut-sm)), calc(100% - var(--about-cut-sm)) 100%, 0 100%);
}

.page-about .check-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .check-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .check-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .check-body {
  display: grid;
  gap: clamp(20px, 3.5vw, 32px);
}

.page-about .check-media {
  border: 1px solid rgba(47, 243, 208, 0.2);
}

.page-about .check-media img {
  width: 100%;
  aspect-ratio: 25 / 16;
  object-fit: cover;
}

.page-about .check-side {
  background: var(--cream);
  color: var(--brown);
  padding: 24px 22px 26px;
  border-top: 4px solid var(--violet);
}

.page-about .check-side h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 800;
  color: var(--brown);
}

.page-about .check-side p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: #3a332b;
}

.page-about .check-side__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .check-side__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #3a332b;
}

.page-about .check-side__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--violet);
  transform: rotate(45deg);
}

.page-about .check-side strong {
  color: var(--brown);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .eco-cell {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--ink-700);
  border-bottom: 2px solid rgba(47, 243, 208, 0.4);
}

.page-about .eco-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--cyan);
}

.page-about .eco-cell__title {
  margin: 8px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .eco-cell__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .eco-types {
  display: grid;
  gap: 1px;
  background: rgba(216, 208, 191, 0.2);
  border: 1px solid rgba(216, 208, 191, 0.2);
}

.page-about .eco-type {
  background: var(--ink);
  padding: 18px 18px 20px;
}

.page-about .eco-type h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--cyan-soft);
}

.page-about .eco-type p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach {
  background: linear-gradient(160deg, rgba(11, 59, 49, 0.9), rgba(4, 29, 24, 0.96));
  border-top: 1px solid rgba(47, 243, 208, 0.28);
}

.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  margin: 26px 0 22px;
}

.page-about .reach-cell {
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}

.page-about .reach-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--white);
}

.page-about .reach-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.66);
}

.page-about .reach-note {
  margin: 0;
  max-width: 60ch;
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.6);
  border-top: 1px dashed rgba(216, 208, 191, 0.3);
  padding-top: 18px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  background: var(--cream);
  color: var(--brown);
  padding: clamp(26px, 4.5vw, 44px) clamp(22px, 3.5vw, 40px);
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  border-top: none;
}

.page-about .about-team .eyebrow {
  color: #8a4a1c;
}

.page-about .about-team .section-title {
  color: var(--brown);
}

.page-about .team-main p {
  max-width: 48ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.9;
  color: #3a332b;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-cell {
  background: #fbf7ec;
  padding: 16px 14px 18px;
}

.page-about .team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--brown);
}

.page-about .team-title {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .team-cell--mark {
  background: var(--cyan-soft);
}

.page-about .team-cell--mark .team-num {
  color: #0d3d34;
}

.page-about .team-cell--mark .team-title {
  color: #23544a;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  text-align: left;
  border-top: 1px solid rgba(216, 208, 191, 0.16);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .btn--primary {
  background: var(--orange);
  color: #22180f;
}

.page-about .btn--primary:hover {
  background: #ffa163;
  transform: translateY(-1px);
}

.page-about .btn--ghost {
  background: transparent;
  border-color: rgba(47, 243, 208, 0.5);
  color: var(--cyan);
}

.page-about .btn--ghost:hover {
  background: rgba(47, 243, 208, 0.14);
}

.page-about .btn--quiet {
  background: var(--brown);
  color: var(--cream);
  padding: 10px 18px;
  font-size: 13.5px;
}

.page-about .btn--quiet:hover {
  background: #2c251d;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .check-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: rgba(47, 243, 208, 0.28);
    border: 1px solid rgba(47, 243, 208, 0.28);
  }

  .page-about .check-step {
    clip-path: none;
    border-top-width: 3px;
  }

  .page-about .eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: rgba(47, 243, 208, 0.24);
    border: 1px solid rgba(47, 243, 208, 0.24);
  }

  .page-about .eco-cell {
    border-bottom: none;
    border-top: 3px solid rgba(47, 243, 208, 0.45);
  }

  .page-about .eco-types {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    padding-block: clamp(34px, 5vw, 62px) clamp(60px, 8vw, 96px);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .era-item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .era-year {
    font-size: clamp(26px, 3vw, 36px);
    padding-left: 16px;
  }

  .page-about .check-body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: stretch;
  }

  .page-about .check-media {
    height: 100%;
  }

  .page-about .check-media img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 320px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
</｜｜DSML｜｜ parameter>
</result>
</final_answer>