.page-about {
  --about-line: rgba(157, 179, 174, 0.24);
  --about-line-soft: rgba(157, 179, 174, 0.14);
  --about-ink-line: rgba(26, 20, 16, 0.18);
  --about-pad: clamp(52px, 7vw, 96px);
  background: var(--ink);
  color: var(--paper);
  overflow: clip;
  font-family: var(--font-body);
}

.page-about .about-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  font-size: 13px;
  color: var(--mist);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  color: var(--mist);
  opacity: 0.5;
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 40px) 0 clamp(44px, 6vw, 76px);
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(53, 224, 206, 0.12), transparent 58%),
    radial-gradient(80% 70% at 96% 6%, rgba(255, 107, 44, 0.14), transparent 62%),
    var(--ink);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .hero-vol {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .hero-vol-rule {
  flex: 1 1 auto;
  max-width: 130px;
  height: 1px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 107, 44, 0));
}

.page-about .hero-title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 7vw, 74px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.page-about .hero-title em {
  font-style: normal;
  color: var(--orange);
  display: inline-block;
}

.page-about .hero-lead {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: rgba(244, 236, 217, 0.8);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .hero-stamp {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 9px 28px 9px 16px;
  background: linear-gradient(90deg, rgba(6, 23, 18, 0.95), rgba(6, 23, 18, 0.68));
  border-top: 1px solid var(--about-line);
  color: var(--paper);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
}

.page-about .hero-stats {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--about-line);
}

.page-about .hero-stats li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-soft);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 阶段时间轴 ---------- */
.page-about .about-stages {
  padding: var(--about-pad) 0;
  background-color: var(--ink-soft);
  background-image:
    linear-gradient(rgba(157, 179, 174, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 179, 174, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .stages-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .aside-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .aside-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}

.page-about .stage-list {
  border-bottom: 1px solid var(--about-line);
}

.page-about .stage {
  border-top: 1px solid var(--about-line);
}

.page-about .stage-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 22px;
  align-items: start;
  gap: clamp(14px, 2.5vw, 26px);
  padding: clamp(18px, 2.8vw, 26px) 0;
  cursor: pointer;
  list-style: none;
  transition: background 0.22s var(--ease);
}

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

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

.page-about .stage-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--mist);
  transition: color 0.22s var(--ease);
}

.page-about .stage[open] .stage-summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .stage:first-child .stage-num {
  color: var(--cyan);
}

.page-about .stage:nth-child(2) .stage-num {
  color: var(--amber);
}

.page-about .stage:nth-child(3) .stage-num {
  color: var(--orange);
}

.page-about .stage-num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

.page-about .stage-body {
  display: block;
}

.page-about .stage-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.35;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .stage-gain {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .stage-panel {
  display: grid;
  gap: 12px;
  padding: 0 0 clamp(20px, 3vw, 28px);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 236, 217, 0.78);
}

.page-about .stage-panel p {
  margin: 0;
}

.page-about .stage-summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

/* ---------- 六大栏目 ---------- */
.page-about .about-columns {
  padding: var(--about-pad) 0;
  background: var(--paper);
  color: var(--brown);
}

.page-about .columns-head {
  max-width: 780px;
}

.page-about .eyebrow--dark {
  color: rgba(26, 20, 16, 0.55);
}

.page-about .columns-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.012em;
}

.page-about .columns-lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(26, 20, 16, 0.75);
}

.page-about .col-rows {
  margin-top: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--about-ink-line);
}

.page-about .col-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px 24px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--about-ink-line);
}

.page-about .col-num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: rgba(26, 20, 16, 0.35);
  transition: color 0.2s var(--ease);
}

.page-about .col-row:hover .col-num {
  color: var(--orange);
}

.page-about .col-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-about .col-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(26, 20, 16, 0.78);
}

/* ---------- 编辑台协作 ---------- */
.page-about .about-desk {
  padding: var(--about-pad) 0;
  background: var(--panel);
  border-top: 1px solid var(--about-line);
}

.page-about .desk-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .desk-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.012em;
}

.page-about .desk-lead {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 236, 217, 0.78);
}

.page-about .desk-steps {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .desk-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .desk-steps li:last-child {
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .desk-steps h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .desk-steps p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .desk-media {
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}

.page-about .desk-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .desk-media figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--about-line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 团队与合作伙伴 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--ink);
  border-top: 1px solid var(--about-line-soft);
}

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

.page-about .team-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.012em;
}

.page-about .team-lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 236, 217, 0.78);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  padding: 16px 0 0;
  border-top: 2px solid var(--about-line);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-3px);
}

.page-about .team-card--cyan {
  border-top-color: var(--cyan);
}

.page-about .team-card--amber {
  border-top-color: var(--amber);
}

.page-about .team-card--violet {
  border-top-color: var(--violet);
}

.page-about .team-card--lime {
  border-top-color: var(--lime);
}

.page-about .team-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .team-card p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .partner-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(34px, 5vw, 56px);
  padding-top: clamp(24px, 3.4vw, 36px);
  border-top: 1px solid var(--about-line);
}

.page-about .partner-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .partner-copy p {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .partner-item {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  font-size: 13.5px;
  line-height: 1.4;
  color: rgba(244, 236, 217, 0.85);
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .partner-item:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 224, 206, 0.08);
}

/* ---------- 吉林本地 ---------- */
.page-about .about-jilin {
  padding: var(--about-pad) 0 0;
  background: var(--paper);
  color: var(--brown);
}

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

.page-about .jilin-copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.012em;
}

.page-about .jilin-copy p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(26, 20, 16, 0.78);
}

.page-about .jilin-link {
  margin-top: 22px;
}

.page-about .jilin-link a {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--brown);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease);
}

.page-about .jilin-link a:hover,
.page-about .jilin-link a:focus-visible {
  color: var(--orange);
}

.page-about .jilin-band {
  position: relative;
  margin: clamp(30px, 5vw, 54px) 0 0;
}

.page-about .jilin-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(170px, 26vw, 300px);
  object-fit: cover;
}

.page-about .jilin-band figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 20px 8px 16px;
  background: rgba(6, 23, 18, 0.82);
  color: rgba(244, 236, 217, 0.85);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: var(--about-pad) 0;
  background:
    radial-gradient(70% 90% at 100% 0%, rgba(255, 107, 44, 0.16), transparent 62%),
    var(--ink);
  border-top: 1px solid var(--about-line);
}

.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .next-grid h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.012em;
}

.page-about .next-lead {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 236, 217, 0.78);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

.page-about .next-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .next-num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--orange);
}

.page-about .next-list h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .next-list p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .col-row {
    grid-template-columns: 64px minmax(0, 220px) minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

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

  .page-about .partner-block {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .desk-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .next-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 960px) {
  .page-about .stages-grid {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .stages-aside {
    position: sticky;
    top: 104px;
  }

  .page-about .stage-panel {
    padding-left: clamp(46px, 5vw, 68px);
  }

  .page-about .desk-media {
    position: sticky;
    top: 104px;
  }
}

@media (min-width: 1140px) {
  .page-about .col-row {
    grid-template-columns: 84px minmax(0, 260px) minmax(0, 1fr);
    gap: 28px;
  }
}

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

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