.page-about {
  --about-rail: 56px;
  --about-pad: clamp(18px, 3vw, 38px);
  padding-bottom: clamp(56px, 8vw, 104px);
  color: var(--paper-100);
  background: var(--ink-950);
}

@media (min-width: 768px) {
  .page-about {
    --about-rail: 92px;
  }
}

@media (min-width: 1120px) {
  .page-about {
    --about-rail: 122px;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(10px, 1.6vw, 18px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-400);
}

.page-about .crumbs a {
  color: var(--gray-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
  outline: none;
}

.page-about .crumbs__current {
  color: var(--gold-500);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(28px, 4vw, 52px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold-500);
  margin: 0 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-hero h1 {
  font-size: clamp(28px, 5.4vw, 58px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.012em;
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  color: var(--paper-100);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  font-size: clamp(14.5px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--gray-400);
  max-width: 54ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-600);
  border: 1px solid var(--line-600);
}

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

.page-about .about-hero__facts li {
  background: var(--ink-900);
  padding: clamp(12px, 1.8vw, 18px) clamp(14px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__facts b {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 29px);
  font-weight: 700;
  color: var(--gold-300);
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .about-hero__facts span {
  font-size: 11.5px;
  color: var(--gray-400);
  letter-spacing: 0.05em;
}

.page-about .about-hero__aside {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line-600);
  background:
    linear-gradient(180deg, rgba(53, 224, 214, 0.07), transparent 58%),
    var(--ink-900);
  overflow: hidden;
}

.page-about .about-hero__aside::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -40px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(229, 75, 155, 0.28);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-hero__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .about-hero__aside-note {
  margin: clamp(12px, 1.8vw, 20px) 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gray-400);
  position: relative;
  z-index: 1;
}

/* ---------- 年份跳转 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--line-600);
}

.page-about .about-jump__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-right: 4px;
}

.page-about .about-jump__link {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--paper-200);
  text-decoration: none;
  padding: 7px 11px;
  border: 1px solid var(--line-600);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(53, 224, 214, 0.06);
  outline: none;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding-top: clamp(30px, 5vw, 60px);
  padding-bottom: clamp(30px, 5vw, 60px);
  display: grid;
  gap: clamp(28px, 4.5vw, 58px);
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: clamp(30px, 5vw, 60px);
  bottom: clamp(30px, 5vw, 60px);
  left: calc(var(--gutter) + var(--about-rail) / 2);
  width: 1px;
  background: linear-gradient(180deg, var(--gold-500), var(--line-600) 32%, var(--line-600) 85%, transparent);
  pointer-events: none;
}

.page-about .about-node {
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  align-items: start;
  position: relative;
}

.page-about .about-node__rail {
  position: relative;
  display: flex;
  justify-content: center;
  padding-top: 4px;
}

.page-about .about-node__year {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 34px);
  letter-spacing: 0.14em;
  color: var(--gold-500);
  line-height: 1;
  padding: 10px 0;
  background: var(--ink-950);
  position: relative;
  z-index: 1;
}

.page-about .about-node--ink .about-node__year {
  background: var(--ink-950);
}

.page-about .about-node__card {
  position: relative;
  padding: var(--about-pad);
  border: 1px solid var(--line-600);
  background: var(--ink-900);
  color: var(--paper-100);
  transition: border-color 0.2s ease, transform 0.24s ease;
}

.page-about .about-node__card::before {
  content: "";
  position: absolute;
  left: calc(-1 * (var(--about-rail) / 2 + clamp(12px, 2vw, 26px)));
  top: 14px;
  width: calc(var(--about-rail) / 2 + clamp(12px, 2vw, 26px));
  height: 1px;
  background: var(--line-600);
  pointer-events: none;
}

.page-about .about-node--paper .about-node__card {
  background: var(--paper-100);
  color: var(--ink-950);
  border-color: var(--paper-200);
}

.page-about .about-node--paper .about-node__card:hover {
  border-color: var(--gold-500);
}

.page-about .about-node--ink .about-node__card:hover {
  border-color: var(--gold-500);
}

.page-about .about-node--accent .about-node__card {
  background: var(--ink-900);
  border-color: var(--line-600);
}

.page-about .about-node__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--magenta-500);
  margin: 0 0 14px;
}

.page-about .about-node__card h2 {
  font-size: clamp(19px, 2.6vw, 30px);
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: 0.002em;
  margin: 0 0 clamp(12px, 1.8vw, 20px);
  color: inherit;
  text-wrap: balance;
}

.page-about .about-node__card p {
  font-size: clamp(14px, 1.05vw, 16px);
  line-height: 1.88;
  margin: 0 0 14px;
  color: inherit;
  opacity: 0.86;
  max-width: 68ch;
}

.page-about .about-node--paper .about-node__card p {
  opacity: 1;
  color: rgba(10, 10, 13, 0.78);
}

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

/* 图片 */
.page-about .about-node__figure {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
}

.page-about .about-node__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-600);
  object-fit: cover;
  filter: saturate(0.9) contrast(1.02);
}

.page-about .about-node--paper .about-node__figure img {
  border-color: rgba(10, 10, 13, 0.16);
}

.page-about .about-node__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--gray-400);
}

.page-about .about-node--paper .about-node__figure figcaption {
  color: rgba(10, 10, 13, 0.55);
}

/* 折叠面板 */
.page-about .fold {
  margin-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--line-600);
}

.page-about .fold__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: 0;
  padding: 14px 0;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--gold-300);
  text-align: left;
  cursor: pointer;
  transition: color 0.18s ease;
}

.page-about .fold__head:hover,
.page-about .fold__head:focus-visible {
  color: var(--cyan-400);
  outline: none;
}

.page-about .fold__sign {
  font-family: var(--font-mono);
  font-size: 16px;
  color: inherit;
  transition: transform 0.22s ease;
}

.page-about .fold[data-open="true"] .fold__sign {
  transform: rotate(45deg);
}

.page-about .fold__body {
  padding-bottom: 6px;
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-roles > div {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink-800);
  border-left: 2px solid var(--gold-500);
}

.page-about .about-roles dt {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--paper-200);
  letter-spacing: 0.02em;
}

.page-about .about-roles dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--gray-400);
}

/* 活动类型清单 */
.page-about .about-events {
  list-style: none;
  margin: 4px 0 18px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-600);
  border: 1px solid var(--line-600);
}

.page-about .about-events li {
  background: var(--ink-900);
  padding: 14px 16px;
  display: grid;
  gap: 4px;
}

.page-about .about-events b {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-about .about-events span {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--gray-400);
}

/* 合作清单 */
.page-about .about-partner {
  list-style: none;
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 700px) {
  .page-about .about-partner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: rgba(10, 10, 13, 0.16);
    border: 1px solid rgba(10, 10, 13, 0.16);
  }
}

.page-about .about-partner li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  line-height: 1.7;
  color: var(--ink-950);
  padding: 12px 14px;
  background: var(--paper-200);
}

@media (min-width: 700px) {
  .page-about .about-partner li {
    background: var(--paper-100);
    border: 0;
  }
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-top: clamp(36px, 6vw, 72px);
  padding-bottom: clamp(20px, 4vw, 40px);
  border-top: 1px solid var(--line-600);
}

.page-about .about-next__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .about-next__head h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.28;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--paper-100);
  letter-spacing: -0.005em;
  text-wrap: balance;
}

.page-about .about-next__head p {
  margin: 0;
  font-size: clamp(14px, 1.05vw, 16px);
  line-height: 1.82;
  color: var(--gray-400);
}

.page-about .about-next__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 700px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-next__item a {
  display: grid;
  gap: 10px;
  align-content: start;
  height: 100%;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--line-600);
  background: var(--ink-900);
  color: var(--paper-100);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.24s ease;
}

.page-about .about-next__item a:hover,
.page-about .about-next__item a:focus-visible {
  border-color: var(--cyan-400);
  background: var(--ink-800);
  transform: translateY(-3px);
  outline: none;
}

.page-about .about-next__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--gold-500);
}

.page-about .about-next__item strong {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-100);
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray-400);
}

.page-about .about-next__go {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

/* ---------- 滚动显现兜底 ---------- */
.page-about .reveal {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-about .reveal {
    transform: none !important;
  }
}
<<<END>>>