.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 开篇 ---------- */
.page-about .about-open {
  padding: var(--sp-4) 0 var(--sp-6);
  background: linear-gradient(180deg, var(--paper-lift) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .open-grid {
  row-gap: var(--sp-4);
  align-items: start;
}

.page-about .eyebrow {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--red);
  margin: 0 0 var(--sp-2);
}

.page-about .open-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8vw, 54px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  margin: 0 0 var(--sp-3);
  color: var(--ink);
}

.page-about .open-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--charcoal);
  margin: 0 0 var(--sp-3);
  max-width: 34em;
}

.page-about .open-index {
  margin-top: var(--sp-4);
  border-top: 1px solid var(--line);
}

.page-about .open-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .open-index-list li {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .open-index-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 10px 4px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .open-index-list a:hover {
  background: var(--tint);
  color: var(--red-deep);
}

.page-about .oi-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--red);
}

@media (min-width: 640px) {
  .page-about .open-index-list {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--sp-4);
  }
}

/* ---------- 图片框 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--paper-lift);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-figure figcaption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--stone);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: var(--sp-6) 0;
}

.page-about .about-sec--tint {
  background: var(--tint);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec--last {
  padding-bottom: var(--sp-7);
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  column-gap: var(--sp-2);
  row-gap: var(--sp-1);
  align-items: start;
  margin-bottom: var(--sp-4);
}

.page-about .chapter-num {
  font-family: var(--font-num);
  font-weight: 900;
  font-size: clamp(38px, 10vw, 72px);
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--red);
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .chapter-num {
    color: transparent;
    -webkit-text-stroke: 1px var(--red);
  }
  .page-about .chapter-num.is-filled {
    color: var(--red);
    -webkit-text-stroke: 1px var(--red);
  }
}

.page-about .chapter-main {
  min-width: 0;
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5.2vw, 36px);
  line-height: 1.28;
  margin: 4px 0 var(--sp-2);
  color: var(--ink);
}

.page-about .chapter-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--charcoal);
  margin: 0;
  max-width: 34em;
}

.page-about .chapter-vertical {
  writing-mode: vertical-rl;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--stone);
  align-self: start;
}

/* ---------- 正文 ---------- */
.page-about .prose p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--charcoal);
  margin: 0 0 var(--sp-3);
  max-width: 38em;
}

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

.page-about .prose a,
.page-about .mt-list a {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .prose a:hover,
.page-about .mt-list a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

/* ---------- 时间纵轴 ---------- */
.page-about .tl {
  position: relative;
  display: grid;
  gap: var(--sp-2);
  padding-left: 26px;
  margin: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--red) 0%, var(--red-pale) 55%, var(--line) 100%);
}

.page-about .tl-node {
  position: relative;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  padding: var(--sp-3);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  border: 1px solid var(--paper-lift);
}

.page-about .tl-node--now {
  border-color: var(--line-gold);
}

.page-about .tl-node--now::before {
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--red-pale);
}

.page-about .tl-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-about .tl-node summary::marker {
  content: "";
}

.page-about .tl-year {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-about .tl-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .tl-more {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
  border-bottom: 1px solid var(--line);
}

.page-about .tl-more::after {
  content: "展开";
}

.page-about .tl-node[open] .tl-more::after {
  content: "收起";
}

.page-about .tl-body {
  margin-top: var(--sp-2);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--line-soft);
}

.page-about .tl-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--charcoal);
  margin: 0;
  max-width: 36em;
}

.page-about .tl-figure {
  margin: var(--sp-2) 0;
}

@media (min-width: 900px) {
  .page-about .tl {
    grid-template-columns: 1fr 1fr;
    column-gap: 72px;
    row-gap: var(--sp-3);
    padding-left: 0;
    margin-top: var(--sp-5);
  }

  .page-about .tl::before {
    left: 50%;
  }

  .page-about .tl-node:nth-of-type(odd) {
    grid-column: 1;
    padding-right: 44px;
  }

  .page-about .tl-node:nth-of-type(even) {
    grid-column: 2;
    padding-left: 44px;
  }

  .page-about .tl-node:nth-of-type(odd)::before {
    left: auto;
    right: -40px;
    top: 32px;
  }

  .page-about .tl-node:nth-of-type(even)::before {
    left: -40px;
    top: 32px;
  }

  .page-about .tl-year {
    writing-mode: vertical-rl;
    position: absolute;
    top: 14px;
    letter-spacing: 0.24em;
  }

  .page-about .tl-node:nth-of-type(odd) .tl-year {
    right: 14px;
  }

  .page-about .tl-node:nth-of-type(even) .tl-year {
    left: 14px;
  }

  .page-about .tl-figure {
    grid-column: 1 / -1;
    max-width: 560px;
    margin: var(--sp-3) auto;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .role-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-3);
}

.page-about .role-item {
  padding: var(--sp-2);
  border-left: 1px solid var(--line-soft);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .role-item:hover {
  background: var(--paper-lift);
  border-left-color: var(--gold);
}

.page-about .role-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.page-about .role-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .role-count {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--red);
  white-space: nowrap;
}

.page-about .role-bar {
  display: block;
  height: 6px;
  margin-top: 12px;
  background: var(--red-pale);
}

.page-about .role-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--red) 0%, var(--red-pale) 100%);
}

.page-about .role-item:hover .role-fill {
  background: linear-gradient(90deg, var(--red-deep) 0%, var(--red) 100%);
}

.page-about .role-fill--tech {
  width: 38.9%;
}

.page-about .role-fill--content {
  width: 27.8%;
}

.page-about .role-fill--service {
  width: 33.3%;
}

.page-about .role-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--charcoal);
  margin: 12px 0 0;
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: var(--sp-5);
  }
}

/* ---------- 维护机制 ---------- */
.page-about .mt-grid {
  display: grid;
  gap: var(--sp-2);
}

.page-about .mt-card {
  border: 1px solid var(--line);
  border-top: 2px solid var(--red);
  background: var(--paper-lift);
  padding: var(--sp-3);
}

.page-about .mt-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  margin: 0 0 var(--sp-2);
  color: var(--ink);
}

.page-about .mt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .mt-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--charcoal);
}

.page-about .mt-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--gold);
}

@media (min-width: 760px) {
  .page-about .mt-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-3);
  }
}

/* ---------- 规模 ---------- */
.page-about .scale-band {
  background: var(--red);
  color: var(--paper-lift);
}

.page-about .scale-inner {
  padding: var(--sp-6) 0;
}

.page-about .chapter-head--ink .chapter-title {
  color: var(--paper-lift);
}

.page-about .chapter-head--ink .chapter-lead {
  color: var(--on-ink);
}

.page-about .chapter-head--ink .chapter-vertical {
  color: var(--gold-bright);
}

.page-about .chapter-num--ink {
  color: var(--gold-bright);
  -webkit-text-stroke: 0;
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .chapter-num--ink {
    color: transparent;
    -webkit-text-stroke: 1px var(--gold-bright);
  }
  .page-about .chapter-num--ink.is-filled {
    color: var(--gold-bright);
  }
}

.page-about .scale-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  border-top: 1px solid rgba(240, 210, 124, 0.45);
  padding-top: var(--sp-4);
}

.page-about .stat {
  border-left: 1px solid rgba(240, 210, 124, 0.45);
  padding-left: var(--sp-2);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(26px, 5.6vw, 38px);
  line-height: 1.1;
  color: var(--gold-bright);
  letter-spacing: -0.01em;
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--on-ink);
}

.page-about .scale-note {
  margin-top: var(--sp-5);
  display: grid;
  gap: var(--sp-2);
  max-width: 46em;
}

.page-about .scale-note p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-ink);
  margin: 0;
}

@media (min-width: 760px) {
  .page-about .scale-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-4);
  }
}

/* ---------- 审核与安全 ---------- */
.page-about .sec-grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .sec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .sec-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .sec-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 1px;
  background: var(--red);
}

.page-about .sec-list strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .sec-panel {
  background: var(--paper-lift);
  border: 1px solid var(--line);
  border-left: 2px solid var(--jade);
  padding: var(--sp-3);
}

.page-about .sec-panel-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .sec-panel-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--charcoal);
  margin: 0 0 var(--sp-3);
}

@media (min-width: 900px) {
  .page-about .sec-grid {
    grid-template-columns: 1.4fr 0.6fr;
    align-items: start;
    gap: var(--sp-5);
  }
}

/* ---------- 合作入口 ---------- */
.page-about .cta-wrap {
  display: grid;
  gap: var(--sp-3);
}

.page-about .cta-plaque {
  position: relative;
  display: block;
  text-decoration: none;
  background: var(--red);
  border: 1px solid var(--red-deep);
  padding: var(--sp-4);
  transition: background 0.2s var(--ease);
}

.page-about .cta-plaque::before,
.page-about .cta-plaque::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--gold-bright);
}

.page-about .cta-plaque::before {
  top: 12px;
  left: 12px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .cta-plaque::after {
  bottom: 12px;
  right: 12px;
  border-left: 0;
  border-top: 0;
}

.page-about .cta-plaque:hover,
.page-about .cta-plaque:focus-visible {
  background: var(--red-deep);
}

.page-about .cta-label {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold-bright);
}

.page-about .cta-title {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.4vw, 30px);
  line-height: 1.35;
  margin: 12px 0 10px;
  color: var(--paper-lift);
}

.page-about .cta-meta {
  display: block;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-ink);
  max-width: 40em;
}

.page-about .cta-go {
  display: inline-block;
  margin-top: var(--sp-2);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-bright);
  border-bottom: 1px solid var(--line-gold);
}

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

.page-about .cta-links li {
  background: var(--paper-lift);
}

.page-about .cta-links a {
  display: block;
  padding: 14px 12px;
  min-height: 44px;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
}

.page-about .cta-links a:hover {
  background: var(--tint);
  color: var(--red-deep);
}

@media (min-width: 760px) {
  .page-about .cta-links {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .cta-plaque {
    padding: var(--sp-5);
  }
}
<<<PAGE_CSS_END>>>