.page-about {
  --about-pad: clamp(46px, 7vw, 92px);
  background: var(--ink-900);
  color: var(--paper-bright);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3.5vw, 32px);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4.5vw, 48px) 0 var(--about-pad);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  align-items: center;
}

.page-about .about-hero-copy .eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0;
}

.page-about .about-est {
  padding: 3px 10px;
  border: 1px solid rgba(184, 255, 61, 0.45);
  border-radius: var(--r-pill);
  color: var(--lime);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 5.6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 16px 0 0;
  color: var(--paper-bright);
}

.page-about .about-hero-lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.8;
  color: rgba(255, 248, 234, 0.82);
}

.page-about .about-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero-facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-hero-facts li > span:last-child {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero-visual {
  position: relative;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900) 55%, #10233c);
  margin: 0;
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-cap {
  position: absolute;
  left: 16px;
  bottom: 14px;
  margin: 0;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(7, 17, 31, 0.78);
  border: 1px solid var(--line);
  color: var(--cyan);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-chapter-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-index {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 0.9;
  color: var(--lime);
  opacity: 0.42;
  letter-spacing: -0.03em;
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--paper-bright);
}

.page-about .about-lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-body p {
  margin: 0 0 16px;
  font-size: clamp(0.98rem, 1.35vw, 1.08rem);
  line-height: 1.85;
  color: rgba(255, 248, 234, 0.8);
}

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

.page-about .about-split {
  display: grid;
  gap: 24px;
}

.page-about .about-note {
  border-left: 3px solid var(--lime);
  padding: 2px 0 2px 18px;
}

.page-about .about-note-tag {
  margin: 0 0 8px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--lime);
  font-family: var(--font-mono);
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 坐标模型 ---------- */
.page-about .coord-grid {
  display: grid;
  gap: 14px;
}

.page-about .coord-node {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(18px, 3vw, 28px);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.page-about .coord-node:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 184, 77, 0.55);
  box-shadow: 0 12px 28px rgba(255, 184, 77, 0.12);
}

.page-about .coord-tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .coord-node h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.6vw, 1.16rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-bright);
}

.page-about .coord-node p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-afterword {
  margin: 20px 0 0;
  padding: 14px 18px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(255, 248, 234, 0.72);
}

/* ---------- 年份轨道 ---------- */
.page-about .about-track {
  position: relative;
  padding-left: 26px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--lime) 52%, var(--amber));
  opacity: 0.5;
}

.page-about .about-year {
  position: relative;
  padding-bottom: 26px;
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lime);
  transition: background var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-about .about-year.is-revealed::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 61, 0.14);
}

.page-about .about-year.is-key::before {
  border-color: var(--amber);
}

.page-about .about-year.is-key.is-revealed::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 184, 77, 0.16);
}

.page-about .about-year-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 6px;
}

.page-about .about-year-num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.6vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper-bright);
}

.page-about .about-year.is-key .about-year-num {
  color: var(--amber);
}

.page-about .about-year p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 68ch;
}

.page-about .about-track-visual {
  position: relative;
  margin: clamp(24px, 4vw, 40px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, var(--ink-800), var(--ink-700));
}

.page-about .about-track-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 14px;
}

.page-about .about-team-card {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--ink-800), rgba(15, 27, 45, 0.55));
}

.page-about .about-team-tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: rgba(84, 214, 255, 0.12);
  color: var(--cyan);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.page-about .about-team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.14rem);
  line-height: 1.45;
  color: var(--paper-bright);
}

.page-about .about-team-card p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team-card--wide {
  background: linear-gradient(120deg, rgba(184, 255, 61, 0.1), var(--ink-800) 62%);
  border-color: rgba(184, 255, 61, 0.28);
}

/* ---------- 审核步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 6px 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-step:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-step-num {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--amber);
  padding-top: 3px;
  letter-spacing: 0.06em;
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.45;
  color: var(--paper-bright);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(22px, 3.5vw, 34px);
}

.page-about .about-eco-visual {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 70% 20%, rgba(184, 255, 61, 0.14), var(--ink-800) 68%);
}

.page-about .about-eco-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-eco-list li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-eco-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-eco-list .mono {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-eco-list strong {
  display: block;
  color: var(--paper-bright);
  font-weight: 600;
}

.page-about .about-eco-note {
  margin: 18px 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
}

/* ---------- 暖纸画册区块 ---------- */
.page-about .about-paper {
  background: var(--paper);
  color: var(--ink-800);
  border-radius: var(--r-xl);
  padding: clamp(24px, 4.5vw, 58px);
}

.page-about .about-paper .about-index {
  color: var(--ink-700);
  opacity: 0.35;
}

.page-about .about-paper h2 {
  color: var(--ink-900);
}

.page-about .about-paper .about-lede {
  color: #4c5a6b;
}

.page-about .about-reach-grid {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(24px, 3.5vw, 34px);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: rgba(15, 27, 45, 0.05);
  border-top: 3px solid var(--lime);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  line-height: 1;
  color: var(--ink-900);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: #556575;
}

.page-about .about-persona {
  display: grid;
  gap: 16px;
  border-top: 1px solid rgba(15, 27, 45, 0.14);
  padding-top: clamp(20px, 3vw, 28px);
}

.page-about .about-persona h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-900);
}

.page-about .about-persona p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: #4c5a6b;
}

/* ---------- 收尾 ---------- */
.page-about .about-chapter--final {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-cta {
  display: grid;
  gap: clamp(22px, 3.5vw, 36px);
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--r-xl);
  border: 1px solid rgba(184, 255, 61, 0.3);
  background:
    radial-gradient(circle at 8% 0%, rgba(84, 214, 255, 0.16), transparent 55%),
    linear-gradient(140deg, var(--ink-800), var(--ink-900) 70%);
}

.page-about .about-cta-copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.9vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--paper-bright);
  max-width: 30ch;
}

.page-about .about-cta-copy p {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta-links {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-cta-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  color: var(--paper-bright);
  text-decoration: none;
  font-size: 0.94rem;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-cta-link .mono {
  font-family: var(--font-mono);
  color: var(--lime);
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  border-color: var(--lime);
  background: rgba(184, 255, 61, 0.1);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .coord-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-team-card--wide {
    grid-column: span 2;
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-chapter-head {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 4px 26px;
    align-items: start;
  }

  .page-about .about-index {
    font-size: clamp(2.6rem, 4vw, 3.6rem);
    padding-top: 4px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-year {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 4px 26px;
    align-items: start;
  }

  .page-about .about-year-head {
    margin-bottom: 0;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 40px;
  }

  .page-about .about-step {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    padding: clamp(34px, 4.5vw, 56px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero h1 {
    max-width: 15ch;
  }

  .page-about .about-track {
    padding-left: 34px;
  }

  .page-about .about-year::before {
    left: -34px;
  }
}
<<<END>>>