.page-about {
  --about-ghost: rgba(18, 16, 13, 0.14);
  --about-rule: rgba(18, 16, 13, 0.2);
  --about-rule-soft: rgba(18, 16, 13, 0.12);
  background: var(--deep-pitch);
  color: var(--line-white);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--electric-cyan);
  outline-offset: 3px;
}

.page-about .kicker--ink {
  color: rgba(18, 16, 13, 0.6);
}

.page-about .inline-link,
.page-about .aside-link {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.45);
}

.page-about .aside-link {
  color: #0b7d72;
  border-bottom-color: rgba(11, 125, 114, 0.4);
}

.page-about .inline-link:hover,
.page-about .aside-link:hover {
  border-bottom-color: currentColor;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(24px, 4vw, 46px) 0 clamp(40px, 6vw, 82px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 46% at 86% 2%, rgba(53, 224, 208, 0.16), transparent 62%),
    radial-gradient(ellipse 46% 42% at 4% 94%, rgba(255, 90, 42, 0.14), transparent 66%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(to right, var(--line-soft) 1px, transparent 1px);
  background-size: 25% 100%;
  opacity: 0.6;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
  margin-top: clamp(20px, 3.2vw, 34px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 5.4vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  text-wrap: balance;
}

.page-about .about-hero__title .hl {
  color: var(--signal-orange);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0 0 clamp(18px, 2.4vw, 24px);
  font-size: clamp(1rem, 0.95rem + 0.28vw, 1.14rem);
  line-height: 1.82;
  color: rgba(233, 242, 234, 0.82);
}

.page-about .about-hero__stamp {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--muted-moss);
}

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

.page-about .about-hero__aside {
  border: 1px solid var(--line-mid);
  background: linear-gradient(180deg, rgba(15, 47, 36, 0.94), rgba(15, 47, 36, 0.68));
  padding: clamp(16px, 2.2vw, 22px);
}

.page-about .about-hero__aside-h {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--electric-cyan);
}

.page-about .hs-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
}

.page-about .hs-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 10px;
  background: var(--tunnel-green);
}

.page-about .hs-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.6vw, 1.95rem);
  line-height: 1;
  color: var(--data-yellow);
}

.page-about .hs-key {
  font-size: 0.76rem;
  color: rgba(233, 242, 234, 0.66);
}

/* ---------- 起点与演进 ---------- */
.page-about .about-origin {
  background: var(--cream-paper);
  color: var(--ink-brown-black);
  padding: clamp(44px, 6vw, 92px) 0;
}

.page-about .about-origin__title {
  margin: 0 0 16px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.72rem, 3.4vw, 2.85rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink-brown-black);
  text-wrap: balance;
}

.page-about .about-origin__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.97rem, 0.94rem + 0.2vw, 1.07rem);
  line-height: 1.88;
  color: rgba(18, 16, 13, 0.78);
}

.page-about .about-origin__figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
}

.page-about .about-origin__figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--about-rule);
}

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

.page-about .about-origin__figure .media-caption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--signal-orange);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  color: rgba(18, 16, 13, 0.55);
}

.page-about .about-origin__body {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(30px, 4.4vw, 54px);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--about-rule);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 3.6vw, 38px) 34px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 15px;
  height: 15px;
  background: var(--cream-paper);
  border: 1px solid var(--ink-brown-black);
}

.page-about .tl-item.is-live::before {
  background: var(--signal-orange);
  border-color: var(--signal-orange);
}

.page-about .tl-item__year {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 6.4vw, 3.9rem);
  line-height: 0.84;
  letter-spacing: -0.045em;
  color: var(--about-ghost);
}

.page-about .tl-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.9vw, 1.36rem);
  line-height: 1.36;
  color: var(--ink-brown-black);
}

.page-about .tl-item__text {
  margin: 0 0 10px;
  max-width: 52ch;
  line-height: 1.82;
  color: rgba(18, 16, 13, 0.76);
}

.page-about .tl-item__summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.12em;
  color: #b83a13;
  border-bottom: 1px dashed var(--about-rule);
}

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

.page-about .tl-item__summary::after {
  content: "+";
  font-size: 0.95rem;
  line-height: 1;
}

.page-about .tl-item__more[open] .tl-item__summary::after {
  content: "−";
}

.page-about .tl-item__detail {
  margin: 12px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--electric-cyan);
  background: rgba(18, 16, 13, 0.05);
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(18, 16, 13, 0.78);
}

.page-about .about-origin__aside {
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-origin__aside-h {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(18, 16, 13, 0.55);
}

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

.page-about .aside-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--about-rule-soft);
  font-size: 0.88rem;
}

.page-about .aside-list li span:first-child {
  color: rgba(18, 16, 13, 0.6);
}

.page-about .aside-list li span:last-child {
  font-family: var(--font-mono);
  color: var(--ink-brown-black);
  text-align: right;
}

.page-about .about-origin__aside-note {
  margin: 16px 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(18, 16, 13, 0.66);
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  padding: clamp(44px, 6vw, 92px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
}

.page-about .about-team__title,
.page-about .about-process__title,
.page-about .about-archive__title,
.page-about .about-recognition__title,
.page-about .about-partner__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.58rem, 3.2vw, 2.55rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-team__text {
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 54ch;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.78);
}

.page-about .team-chart {
  padding-top: 16px;
  border-top: 1px solid var(--line-mid);
}

.page-about .team-chart__cap {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-moss);
}

.page-about .team-chart__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) 36px;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

.page-about .team-chart__key {
  font-size: 0.84rem;
  color: rgba(233, 242, 234, 0.78);
}

.page-about .team-chart__track {
  display: block;
  height: 8px;
  background: var(--line-soft);
}

.page-about .team-chart__bar {
  display: block;
  height: 100%;
}

.page-about .team-chart__row--ed .team-chart__bar {
  width: 50%;
  background: var(--electric-cyan);
}

.page-about .team-chart__row--tag .team-chart__bar {
  width: 16.7%;
  background: var(--data-yellow);
}

.page-about .team-chart__row--obs .team-chart__bar {
  width: 88.9%;
  background: var(--signal-orange);
}

.page-about .team-chart__val {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  text-align: right;
  color: var(--data-yellow);
}

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

.page-about .about-team__figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-mid);
}

.page-about .about-team__figure .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  color: var(--muted-moss);
}

.page-about .fold {
  margin-top: 22px;
  padding-left: 16px;
  border-left: 2px solid var(--signal-orange);
}

.page-about .fold__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal-orange);
}

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

.page-about .fold__summary::after {
  content: "+";
  font-size: 1rem;
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .fold[open] .fold__summary::after {
  content: "−";
}

.page-about .fold__body {
  max-width: 66ch;
  padding: 14px 0 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.74);
}

.page-about .fold__body p {
  margin: 0 0 10px;
}

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

/* ---------- 三级校审 ---------- */
.page-about .about-process {
  padding: clamp(44px, 6vw, 92px) 0;
  background: var(--tunnel-green);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-process__lede {
  margin: 0;
  max-width: 60ch;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.78);
}

.page-about .steps {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .step {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(7, 26, 20, 0.62);
}

.page-about .step__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.22em;
  color: var(--electric-cyan);
}

.page-about .step__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1.4;
}

.page-about .step__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.82;
  color: rgba(233, 242, 234, 0.72);
}

.page-about .about-process__note {
  margin: clamp(24px, 3vw, 32px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.88;
  color: rgba(233, 242, 234, 0.82);
}

/* ---------- 阵容档案 ---------- */
.page-about .about-archive {
  padding: clamp(44px, 6vw, 92px) 0;
}

.page-about .about-archive__lede {
  margin: 0 0 clamp(26px, 3.4vw, 40px);
  max-width: 60ch;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.76);
}

.page-about .archive-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .af {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 3vw, 32px) clamp(12px, 1.8vw, 20px);
  background: var(--deep-pitch);
}

.page-about .af-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.4rem, 7.6vw, 4.9rem);
  line-height: 0.9;
  letter-spacing: -0.045em;
  color: var(--data-yellow);
}

.page-about .af-unit {
  margin-left: 2px;
  font-size: 0.42em;
}

.page-about .af-key {
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgba(233, 242, 234, 0.66);
}

.page-about .about-archive__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.1em;
  color: var(--muted-moss);
}

/* ---------- 行业观察 ---------- */
.page-about .about-recognition {
  padding: clamp(38px, 5.2vw, 74px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-recognition__row {
  display: grid;
  gap: clamp(22px, 3vw, 44px);
}

.page-about .about-recognition__text {
  margin: 0;
  max-width: 56ch;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.76);
}

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

/* ---------- 合作网络 ---------- */
.page-about .about-partner {
  padding: clamp(44px, 6vw, 92px) 0;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(53, 224, 208, 0.07), transparent 58%);
}

.page-about .about-partner__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
}

.page-about .about-partner__text {
  margin: 0;
  max-width: 56ch;
  line-height: 1.85;
  color: rgba(233, 242, 234, 0.78);
}

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

.page-about .about-partner__figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line-mid);
}

.page-about .about-partner__figure .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  color: var(--muted-moss);
}

.page-about .about-partner__contact {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 34px);
  background: var(--signal-orange);
  color: var(--ink-brown-black);
}

.page-about .apc-h {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.3;
  color: var(--ink-brown-black);
}

.page-about .apc-lines {
  margin: 0;
}

.page-about .apc-mail,
.page-about .apc-tel {
  display: inline-block;
  margin-right: 18px;
  font-family: var(--font-mono);
  font-size: 0.94rem;
  color: var(--ink-brown-black);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 16, 13, 0.42);
}

.page-about .apc-mail:hover,
.page-about .apc-tel:hover {
  border-bottom-color: var(--ink-brown-black);
}

.page-about .apc-note {
  margin: 10px 0 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: rgba(18, 16, 13, 0.74);
}

.page-about .apc-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--deep-pitch);
  color: var(--line-white);
  border: 1px solid var(--deep-pitch);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .apc-btn:hover,
.page-about .apc-btn:focus-visible {
  background: transparent;
  color: var(--ink-brown-black);
  border-color: var(--ink-brown-black);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .archive-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-recognition__row {
    grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
    align-items: center;
  }

  .page-about .about-partner__contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, 0.85fr);
    align-items: start;
  }

  .page-about .about-origin__aside {
    padding-top: 0;
    padding-left: clamp(16px, 2vw, 26px);
    border-top: 0;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    align-items: start;
  }

  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.85fr) minmax(260px, 0.82fr);
    align-items: end;
  }
}
<<<END>>>