.page-about {
  background: var(--violet-800);
  color: var(--frost);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about p {
  margin: 0 0 1em;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--frost);
}

.page-about a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(240, 208, 138, 0.4);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -18%;
  width: min(760px, 96vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 55% 45%, rgba(217, 168, 78, 0.26), rgba(224, 96, 77, 0.08) 46%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -12%;
  width: min(520px, 70vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(143, 163, 168, 0.2), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: rgba(143, 163, 168, 0.6);
}

.page-about .breadcrumb__list a {
  color: var(--ice);
  border-bottom: 0;
}

.page-about .breadcrumb__list a:hover {
  color: var(--gold-light);
}

.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin: 0 0 14px;
}

.page-about .about-h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.6vw, 6px);
  font-size: clamp(28px, 5.6vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 20em;
  color: var(--frost);
}

.page-about .about-lede {
  max-width: 36em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: var(--line-gold);
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-stats li {
  background: var(--violet-800);
  padding: 16px 14px 18px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--gold-light);
}

.page-about .about-stats__num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--gold);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--teal);
}

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-rail__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--teal);
  margin: 0 0 10px;
}

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  flex-direction: row;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line-gold);
  color: var(--ice);
  font-size: 13px;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-rail__list a:hover {
  background: rgba(217, 168, 78, 0.12);
  border-color: var(--gold);
  color: var(--gold-light);
}

.page-about .about-rail__list .mono-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  margin-top: clamp(40px, 6vw, 76px);
  scroll-margin-top: 96px;
}

.page-about .about-sec:first-child {
  margin-top: 0;
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-head__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--frost);
}

.page-about .about-h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.4;
  margin: 0 0 10px;
  color: var(--gold-light);
}

/* ---------- 三条路径 ---------- */
.page-about .about-paths {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-path {
  position: relative;
  padding: 18px 18px 16px;
  background: linear-gradient(168deg, rgba(59, 23, 63, 0.92), rgba(27, 10, 30, 0.82));
  border: 1px solid var(--line-gold);
  border-left: 3px solid var(--gold);
}

.page-about .about-path__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral);
}

.page-about .about-path__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin: 6px 0 8px;
  color: var(--frost);
}

.page-about .about-path__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice);
  margin: 0 0 12px;
}

.page-about .about-path__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--gold-light);
  border-bottom: 1px dashed rgba(240, 208, 138, 0.55);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 22px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-gold);
  background: var(--violet-700);
}

.page-about .about-figure__cap {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--teal);
  line-height: 1.6;
}

/* ---------- 时间线 ---------- */
.page-about .about-track {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-track > li {
  min-width: 0;
}

.page-about .stage {
  position: relative;
  background: linear-gradient(170deg, rgba(59, 23, 63, 0.94), rgba(27, 10, 30, 0.86));
  border: 1px solid var(--line-gold);
  border-radius: 2px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .stage::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(217, 168, 78, 0.16);
  transition: background 0.2s var(--ease);
}

.page-about .stage:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .stage[open]::before {
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(224, 96, 77, 0.2);
}

.page-about .stage summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

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

.page-about .stage__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .stage__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--frost);
}

.page-about .stage__hint {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--teal);
}

.page-about .stage__body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--line-ice);
  margin-top: 2px;
  padding-top: 12px;
}

.page-about .stage__body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ice);
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  background: var(--cream);
  color: var(--ink);
  padding: 20px 18px 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--violet-800);
}

.page-about .team-card__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 8px 0 9px;
  color: var(--violet-700);
}

.page-about .team-card__text {
  font-size: 13.8px;
  line-height: 1.7;
  color: rgba(36, 16, 38, 0.82);
  margin: 0;
}

.page-about .team-detail {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .team-detail__text p {
  font-size: 15.5px;
}

/* ---------- 服务标准 ---------- */
.page-about .std-grid {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  background: var(--line-gold);
  border: 1px solid var(--line-gold);
}

.page-about .std-card {
  background: var(--violet-700);
  padding: 18px 16px;
}

.page-about .std-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 28px);
  letter-spacing: -0.02em;
  color: var(--gold-light);
  line-height: 1.1;
}

.page-about .std-card__num em {
  font-style: normal;
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--gold);
}

.page-about .std-card__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ice);
}

.page-about .about-fold {
  margin-top: 18px;
  border: 1px solid var(--line-ice);
  border-radius: 2px;
  background: rgba(27, 10, 30, 0.5);
}

.page-about .about-fold summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--gold-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

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

.page-about .about-fold summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold);
}

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

.page-about .about-fold__body {
  padding: 4px 16px 18px;
  border-top: 1px dashed var(--line-ice);
}

.page-about .fold-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .fold-steps li {
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice);
}

.page-about .fold-steps .mono-num {
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--violet-900);
  background: var(--gold);
  border-radius: 50%;
}

/* ---------- 生态 ---------- */
.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 4px;
}

.page-about .about-chip {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line-gold);
  background: rgba(217, 168, 78, 0.08);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--line-gold);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-chip:hover {
  background: rgba(217, 168, 78, 0.2);
  border-color: var(--gold);
  color: var(--frost);
}

.page-about .eco-grid {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

.page-about .eco-block {
  padding: 18px 16px;
  background: linear-gradient(180deg, rgba(201, 216, 216, 0.09), rgba(27, 10, 30, 0.7));
  border: 1px solid var(--line-ice);
  border-top: 2px solid var(--ice);
  scroll-margin-top: 100px;
}

.page-about .eco-block:nth-child(2) {
  border-top-color: var(--gold);
}

.page-about .eco-block:nth-child(3) {
  border-top-color: var(--coral);
}

.page-about .eco-block__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 9px;
  color: var(--frost);
}

.page-about .eco-block p {
  font-size: 14.2px;
  line-height: 1.72;
  color: var(--ice);
  margin: 0;
}

.page-about .about-honor {
  margin-top: 22px;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  border-left: 3px solid var(--coral);
  background: rgba(224, 96, 77, 0.08);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(44px, 6vw, 80px);
  background: var(--violet-900);
  border: 1px solid var(--line-gold);
}

.page-about .about-next__inner {
  padding: clamp(22px, 4vw, 40px) clamp(18px, 4vw, 36px);
}

.page-about .about-head--light {
  border-bottom-color: rgba(240, 208, 138, 0.3);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 26px;
}

.page-about .about-next__actions .btn {
  border-bottom: 0;
}

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

.page-about .about-contact li {
  background: var(--violet-900);
  padding: 12px 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
}

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--teal);
  min-width: 68px;
}

.page-about .about-contact__val {
  font-size: 14.5px;
  color: var(--frost);
  word-break: break-all;
}

.page-about .about-copy {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 5px 12px;
  background: transparent;
  color: var(--gold-light);
  border: 1px solid var(--line-gold);
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-copy:hover {
  background: rgba(217, 168, 78, 0.18);
  border-color: var(--gold);
}

.page-about .about-copy[data-state="ok"] {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .about-copy[data-state="fail"] {
  color: var(--coral);
  border-color: var(--coral);
}

.page-about .about-next .note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--teal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .std-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-track summary {
    padding: 22px 14px 16px;
  }

  .page-about .stage__body {
    padding: 12px 14px 16px;
  }

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

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

  .page-about .team-detail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-about .about-rail__list a {
    display: flex;
    width: 100%;
    padding: 9px 10px;
    border: 1px solid transparent;
    border-left: 2px solid var(--line-gold);
    font-size: 13.5px;
    white-space: normal;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-color: var(--line-gold);
    border-left-color: var(--gold);
    background: rgba(217, 168, 78, 0.1);
  }

  .page-about .about-main {
    max-width: 760px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stage,
  .page-about a,
  .page-about .about-chip,
  .page-about .about-copy {
    transition: none;
  }

  .page-about .stage:hover {
    transform: none;
  }
}
<<<END>>>