.page-about {
  --about-rail-w: 236px;
  --about-gap: clamp(28px, 4.4vw, 60px);
  display: block;
  color: var(--fog);
  background: var(--ink);
  overflow-x: clip;
}

.page-about .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 顶部上下文 ---------- */
.page-about .about-top {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .crumb-sep {
  margin: 0 0.55em;
  color: var(--mute);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 4.5vw, 56px) 0 clamp(40px, 6vw, 78px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(72vw, 760px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(255, 122, 26, 0.26), rgba(255, 122, 26, 0) 64%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: -28%;
  left: -18%;
  width: min(58vw, 560px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0) 66%);
  pointer-events: none;
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
}

.page-about .hero-kicker {
  display: inline-block;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding: 5px 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--yellow);
  background: rgba(255, 212, 0, 0.08);
  border: 1px solid rgba(255, 212, 0, 0.46);
  border-radius: 999px;
}

.page-about h1 {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .hero-lead {
  max-width: 62ch;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(242, 245, 250, 0.82);
}

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

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: rgba(124, 135, 152, 0.28);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .fact {
  padding: 16px 18px;
  background: var(--panel);
}

.page-about .fact dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-about .fact dd {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
}

.page-about .fact-num {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .fact-unit {
  font-size: 13px;
  color: rgba(242, 245, 250, 0.72);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .chapter-rail {
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-title {
  display: none;
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mute);
}

.page-about .rail-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  font-size: 13px;
  color: rgba(242, 245, 250, 0.76);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .rail-num {
  font-size: 11px;
  color: var(--blue);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--fog);
  background: rgba(255, 122, 26, 0.14);
  border-color: rgba(255, 122, 26, 0.5);
}

.page-about .about-body > .chapter {
  padding-bottom: clamp(38px, 5.5vw, 72px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(38px, 5.5vw, 72px);
}

.page-about .about-body > .chapter:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-about .chapter .section-title {
  max-width: 30ch;
}

.page-about .chapter p {
  max-width: 66ch;
  margin: 0 0 1.15em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.88;
  color: rgba(242, 245, 250, 0.84);
}

.page-about .chapter p a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: rgba(47, 168, 255, 0.45);
  text-underline-offset: 3px;
}

.page-about .chapter p a:hover,
.page-about .chapter p a:focus-visible {
  text-decoration-color: var(--blue);
}

/* ---------- 01 服务范围 ---------- */
.page-about .scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

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

.page-about .scope-figure {
  margin: 0;
}

/* ---------- 表格 ---------- */
.page-about .table-wrap {
  margin-top: clamp(24px, 3.4vw, 40px);
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(26, 32, 48, 0.62);
  scrollbar-width: thin;
}

.page-about .table-wrap:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-about table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about thead th {
  padding: 13px 16px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--orange);
  background: rgba(255, 122, 26, 0.09);
  border-bottom: 1px solid var(--line-strong);
}

.page-about tbody th,
.page-about tbody td {
  padding: 13px 16px;
  text-align: left;
  font-weight: 400;
  color: rgba(242, 245, 250, 0.86);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-about tbody th {
  color: var(--fog);
  font-weight: 600;
  white-space: nowrap;
}

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

.page-about tbody tr {
  transition: background 0.2s var(--ease);
}

.page-about tbody tr:hover,
.page-about tbody tr:focus-within {
  background: rgba(47, 168, 255, 0.1);
}

.page-about tbody tr:hover th,
.page-about tbody tr:hover td,
.page-about tbody tr:focus-within th,
.page-about tbody tr:focus-within td {
  color: var(--fog);
}

/* ---------- 02 版本演进 ---------- */
.page-about .version-figure {
  margin: 0 0 clamp(24px, 3.4vw, 38px);
}

/* ---------- 数据带 ---------- */
.page-about .data-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin: clamp(34px, 5vw, 64px) 0;
  padding: 1px;
  background: linear-gradient(100deg, var(--orange), var(--yellow) 34%, var(--green) 68%, var(--blue));
  border-radius: var(--radius-m);
}

.page-about .strip-item {
  padding: 20px 22px;
  background: var(--ink-deep);
}

.page-about .strip-num {
  margin: 0 0 6px;
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-about .strip-label {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 245, 250, 0.7);
}

.page-about .data-strip--split .strip-num {
  color: var(--green);
}

/* ---------- 03 团队分工 ---------- */
.page-about .team-map {
  position: relative;
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 1;
  margin: clamp(26px, 4vw, 44px) auto;
}

.page-about .team-map::before {
  content: "";
  position: absolute;
  inset: 4%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, rgba(47, 168, 255, 0) 29%, rgba(47, 168, 255, 0.22) 29.6%, rgba(47, 168, 255, 0) 30.4%),
    radial-gradient(circle at 50% 50%, rgba(31, 169, 122, 0) 46%, rgba(31, 169, 122, 0.18) 46.6%, rgba(31, 169, 122, 0) 47.4%);
  pointer-events: none;
}

.page-about .team-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 30%;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 2px;
  border-radius: 50%;
  border: 2px solid var(--orange);
  background: radial-gradient(circle at 50% 46%, rgba(255, 122, 26, 0.42), rgba(17, 20, 28, 0.96) 72%);
  box-shadow: 0 0 44px rgba(255, 122, 26, 0.34);
}

.page-about .core-num {
  font-size: clamp(20px, 3.6vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-about .core-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(242, 245, 250, 0.82);
}

.page-about .team-node {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 7px 12px;
  min-width: 76px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: default;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .node-name {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--fog);
  white-space: nowrap;
}

.page-about .node-detail {
  display: block;
  max-height: 0;
  overflow: hidden;
  font-size: 11px;
  line-height: 1.5;
  color: rgba(242, 245, 250, 0.68);
  opacity: 0;
  transition: max-height 0.26s var(--ease), opacity 0.22s var(--ease), margin-top 0.22s var(--ease);
}

.page-about .team-node:hover,
.page-about .team-node:focus-visible {
  transform: translate(-50%, -50%) translateY(-3px);
  background: rgba(26, 32, 48, 0.98);
}

.page-about .team-node:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-about .team-node:hover .node-detail,
.page-about .team-node:focus-visible .node-detail {
  max-height: 44px;
  margin-top: 4px;
  opacity: 1;
}

.page-about .team-node--char {
  left: 50%;
  top: 9%;
  border-color: rgba(255, 122, 26, 0.72);
}

.page-about .team-node--story {
  left: 87%;
  top: 36%;
  border-color: rgba(47, 168, 255, 0.72);
}

.page-about .team-node--goods {
  left: 76%;
  top: 84%;
  border-color: rgba(255, 212, 0, 0.68);
}

.page-about .team-node--tag {
  left: 24%;
  top: 84%;
  border-color: rgba(31, 169, 122, 0.72);
}

.page-about .team-node--tech {
  left: 13%;
  top: 36%;
  border-color: rgba(139, 92, 246, 0.72);
}

.page-about .flow-note {
  max-width: 66ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 15px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 245, 250, 0.84);
  background: rgba(31, 169, 122, 0.1);
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* ---------- 04 合作生态 ---------- */
.page-about .eco-figure {
  margin: 0 0 clamp(24px, 3.4vw, 38px);
}

.page-about .eco-figure img {
  filter: saturate(1.05) contrast(1.02);
}

/* ---------- 06 合作承诺 ---------- */
.page-about .promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(6px, 1.4vw, 14px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--line);
}

.page-about .promise-card {
  padding: 20px 22px;
  background: var(--panel);
  transition: background 0.22s var(--ease);
}

.page-about .promise-card:hover {
  background: rgba(26, 32, 48, 0.72);
}

.page-about .promise-time {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--orange);
}

.page-about .promise-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 245, 250, 0.82);
}

.page-about .contact-block {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(145deg, rgba(255, 122, 26, 0.12), rgba(139, 92, 246, 0.12));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
}

.page-about .contact-title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 900;
  color: var(--fog);
}

.page-about .contact-list {
  display: grid;
  gap: 16px;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  padding: 0;
  list-style: none;
}

.page-about .contact-list li {
  display: grid;
  gap: 4px;
}

.page-about .contact-key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.page-about .contact-val {
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 600;
  color: var(--fog);
  text-decoration: none;
  word-break: break-word;
}

.page-about a.contact-val {
  border-bottom: 1px solid rgba(47, 168, 255, 0.5);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about a.contact-val:hover,
.page-about a.contact-val:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.page-about .contact-note {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(242, 245, 250, 0.62);
}

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

/* ---------- 图片容器微调 ---------- */
.page-about .img-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .promise-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .contact-list li {
    grid-template-columns: 84px minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 14px;
  }

  .page-about .contact-note {
    grid-column: 2;
  }
}

@media (min-width: 860px) {
  .page-about .scope-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.85fr);
  }

  .page-about .hero-facts {
    align-self: end;
  }
}

@media (min-width: 1024px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
    align-items: end;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .chapter-rail {
    position: sticky;
    top: 28px;
    padding: 0 22px 0 0;
    background: none;
    border: 0;
    border-right: 1px solid var(--line);
    border-radius: 0;
    overflow: visible;
  }

  .page-about .rail-title {
    display: block;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 3px;
    white-space: normal;
  }

  .page-about .rail-list a {
    width: 100%;
    padding: 8px 10px;
    border-radius: var(--radius-s);
  }

  .page-about .scope-text {
    padding-right: 8px;
  }
}

@media (min-width: 1200px) {
  .page-about .team-map {
    max-width: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>