.page-about {
  --about-gap: clamp(22px, 4vw, 36px);
  --about-hair: rgba(42, 31, 26, 0.16);
  --about-ink-soft: rgba(42, 31, 26, 0.8);
  background: var(--night-900);
  color: var(--cream-50);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 6vw, 54px) 0 clamp(34px, 7vw, 78px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -20%;
  width: min(560px, 78vw);
  height: min(560px, 78vw);
  background: radial-gradient(circle at 32% 32%, rgba(34, 224, 214, 0.2), rgba(124, 92, 255, 0.16) 46%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  bottom: 6%;
  width: 46%;
  height: 54%;
  background: linear-gradient(120deg, rgba(124, 92, 255, 0.18), transparent 70%);
  transform: skewX(-6deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  margin-top: clamp(20px, 4vw, 34px);
}

.page-about .about-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--neon);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  color: var(--cream-50);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(251, 247, 240, 0.78);
}

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

.page-about .about-stamp {
  display: grid;
  gap: 20px;
  align-content: end;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-about .about-year {
  display: inline-block;
  font-size: clamp(66px, 17vw, 136px);
  font-weight: 500;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--neon);
  transform: skewX(-3deg);
}

.page-about .about-year__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

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

.page-about .about-figures li {
  background: var(--night-700);
  padding: 14px 16px;
}

.page-about .about-figures b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 4vw, 26px);
  font-weight: 500;
  color: var(--cream-50);
}

.page-about .about-figures span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* 奶油阅读面板 */
.page-about .about-body {
  position: relative;
  background: var(--cream-100);
  color: var(--ink);
  padding: clamp(46px, 7vw, 88px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-body::before {
  content: "";
  position: absolute;
  top: -15px;
  left: 8%;
  width: min(320px, 52%);
  height: 32px;
  background: linear-gradient(90deg, var(--neon), var(--violet));
  transform: skewX(-18deg);
}

.page-about .about-chapter {
  padding: clamp(32px, 6vw, 58px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-chapter:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  font-size: clamp(32px, 7vw, 52px);
  font-weight: 500;
  line-height: 0.8;
  color: var(--violet);
  transform: skewX(-3deg);
}

.page-about .about-chapter h2 {
  margin: 0;
  color: var(--ink);
}

.page-about .about-chapter__lead {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(42, 31, 26, 0.86);
}

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

.page-about .about-points__item {
  background: var(--cream-50);
  padding: 18px 16px 20px;
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-points__item:hover,
.page-about .about-points__item:focus-within {
  background: #fff;
  border-left-color: var(--neon);
}

.page-about .about-points__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lake);
}

.page-about .about-points__item h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 24px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-points__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .about-figure {
  margin: var(--about-gap) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--night-700);
  border-radius: var(--radius);
  box-shadow: 0 20px 44px -26px rgba(10, 18, 36, 0.6);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(42, 31, 26, 0.6);
}

/* 团队分工 */
.page-about .about-team {
  margin-top: var(--about-gap);
  display: grid;
  gap: clamp(22px, 4vw, 34px);
}

.page-about .about-mix {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-mix__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-mix__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .about-mix__num {
  font-size: 17px;
  color: var(--night-700);
}

.page-about .about-mix__track {
  display: block;
  margin-top: 7px;
  height: 8px;
  background: rgba(42, 31, 26, 0.12);
  border-radius: 1px;
  overflow: hidden;
}

.page-about .about-mix__fill {
  display: block;
  height: 100%;
  transition: filter var(--dur) var(--ease);
}

.page-about .about-mix__fill--a { width: 39.7%; background: var(--lake); }
.page-about .about-mix__fill--b { width: 30.9%; background: var(--violet); }
.page-about .about-mix__fill--c { width: 17.6%; background: var(--orange); }
.page-about .about-mix__fill--d { width: 11.8%; background: var(--night-700); }

.page-about .about-mix__row:hover .about-mix__fill {
  filter: brightness(1.12);
}

.page-about .about-mix__note {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(42, 31, 26, 0.66);
}

.page-about .about-team__flow {
  margin: clamp(20px, 4vw, 28px) 0 0;
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(42, 31, 26, 0.88);
  background: rgba(46, 158, 143, 0.1);
  border-left: 3px solid var(--neon);
}

/* 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: var(--about-gap) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), var(--violet) 55%, var(--orange));
  opacity: 0.75;
}

.page-about .about-node {
  position: relative;
  padding: 0 0 28px 34px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cream-100);
  border: 2px solid var(--neon);
}

.page-about .about-node__year {
  display: block;
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--night-700);
}

.page-about .about-node__card {
  margin-top: 8px;
  padding: 13px 15px;
  background: var(--cream-50);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--violet);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-node__card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

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

.page-about .about-node:target .about-node__card {
  background: #fff;
  border-color: var(--neon);
}

.page-about .about-fold {
  margin-top: clamp(22px, 4vw, 32px);
  border: 1px solid rgba(42, 31, 26, 0.2);
  background: var(--cream-50);
}

.page-about .about-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-about .about-fold ul {
  list-style: none;
  margin: 0;
  padding: 0 16px 16px;
  display: grid;
  gap: 10px;
}

.page-about .about-fold li {
  padding-left: 14px;
  border-left: 2px solid var(--lake);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* 合作生态 */
.page-about .about-eco {
  list-style: none;
  margin: var(--about-gap) 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-eco li {
  position: relative;
  background: var(--cream-50);
  padding: 22px 18px 20px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-eco li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  width: 32px;
  height: 3px;
  background: var(--neon);
}

.page-about .about-eco li:hover {
  background: #fff;
}

.page-about .about-eco b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 500;
  line-height: 1;
  color: var(--violet);
}

.page-about .about-eco h3 {
  margin: 10px 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

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

.page-about .about-honors {
  list-style: none;
  margin: var(--about-gap) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-honors li {
  padding: 12px 14px;
  background: rgba(46, 158, 143, 0.12);
  border-left: 3px solid var(--lake);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(42, 31, 26, 0.88);
}

.page-about .about-partner-note {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

/* 后续路径 */
.page-about .about-next {
  margin-top: clamp(34px, 6vw, 56px);
  padding-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-next h2 {
  margin: 0;
  color: var(--ink);
}

.page-about .about-next__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-next__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: var(--cream-50);
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-next__list a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-about .about-next__list a:hover {
  background: var(--night-700);
  color: var(--cream-50);
}

.page-about .about-trail {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.page-about .about-trail__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: transparent;
  border: 1px solid rgba(42, 31, 26, 0.3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-trail__btn:hover {
  border-color: var(--neon);
  background: rgba(34, 224, 214, 0.16);
}

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-about .about-node {
    width: 50%;
    padding: 0 44px 34px 0;
  }

  .page-about .about-node::before {
    left: auto;
    right: -6px;
    top: 10px;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 34px 44px;
  }

  .page-about .about-node:nth-child(even)::before {
    left: -6px;
    right: auto;
  }

  .page-about .about-node__year {
    text-align: right;
  }

  .page-about .about-node:nth-child(even) .about-node__year {
    text-align: left;
  }

  .page-about .about-figure--side {
    margin-top: 0;
  }
}

@media (max-width: 420px) {
  .page-about .about-figures {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-chapter__head {
    flex-direction: column;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-points__item,
  .page-about .about-mix__fill,
  .page-about .about-node__card,
  .page-about .about-eco li,
  .page-about .about-next__list a,
  .page-about .about-trail__btn {
    transition: none;
  }
}