.page-about {
  --about-accent-deep: #b4482a;
  --about-paper-ink: #111820;
  --about-paper-soft: #5a5f63;
  position: relative;
  overflow-x: clip;
}

.page-about .about-crumb {
  padding: 18px 0 4px;
}

.page-about .about-crumb .breadcrumb__list {
  flex-wrap: wrap;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 56px) 0 clamp(30px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 640px;
  background:
    radial-gradient(46% 58% at 16% 26%, rgba(141, 107, 255, 0.32), transparent 72%),
    radial-gradient(40% 52% at 80% 4%, rgba(54, 241, 227, 0.20), transparent 70%),
    radial-gradient(36% 46% at 58% 86%, rgba(255, 122, 89, 0.16), transparent 72%);
  filter: blur(10px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 3.2rem + 1.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper-white);
  text-wrap: balance;
}

.page-about .about-hero__mark {
  position: relative;
  display: inline-block;
  color: var(--cyan);
  padding-bottom: 4px;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--coral), var(--violet));
  border-radius: 6px;
  transform: rotate(-0.6deg);
  opacity: 0.85;
}

.page-about .about-hero__lead {
  margin-top: 20px;
  max-width: 52ch;
  color: var(--text-soft);
}

.page-about .about-hero__act {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.page-about .about-hero__act-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

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

.page-about .about-hero__stats li {
  background: var(--ink-2);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 1.2rem + 0.7vw, 26px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--text-mute);
  line-height: 1.4;
}

/* ---------- 阅读索引 ---------- */
.page-about .about-index {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-index__panel {
  position: relative;
  background: var(--paper);
  color: var(--about-paper-ink);
  border: 1px solid rgba(201, 166, 107, 0.5);
  border-radius: var(--radius);
  padding: clamp(22px, 4vw, 42px);
  padding-left: clamp(28px, 5vw, 54px);
  box-shadow: 0 26px 64px rgba(3, 10, 20, 0.48);
  overflow: hidden;
}

.page-about .about-index__panel::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 100%;
  background: linear-gradient(180deg, var(--coral), var(--gold));
}

.page-about .about-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-index__eyebrow {
  color: var(--about-accent-deep);
}

.page-about .about-index__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 1.15rem + 0.9vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--about-paper-ink);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 2px;
  border-bottom: 1px solid rgba(17, 24, 32, 0.16);
  color: var(--about-paper-ink);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--about-accent-deep);
  padding-left: 10px;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--about-accent-deep);
  flex: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(40px, 7vw, 86px) 0;
}

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

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 30px);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-chapter__seq {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--coral);
}

.page-about .about-chapter__vert {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.32em;
  color: var(--text-mute);
}

.page-about .about-chapter__body {
  min-width: 0;
}

.page-about .about-chapter__body .h-sec {
  margin-top: 10px;
  text-wrap: balance;
}

.page-about .about-chapter__lead {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--text-soft);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 38px);
}

.page-about .about-origin__text p {
  color: var(--text-soft);
}

.page-about .about-points {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 20px;
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--coral);
  transform: rotate(45deg);
}

.page-about .about-origin__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(141, 107, 255, 0.36), rgba(54, 241, 227, 0.2));
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.42);
}

.page-about .about-origin__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media__caption {
  display: block;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-mute);
  background: rgba(6, 17, 31, 0.72);
  border-top: 1px solid var(--line);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 22px;
  padding-bottom: 6px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(54, 241, 227, 0.7), rgba(54, 241, 227, 0.05));
}

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

.page-about .about-tl__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-tl__label {
  font-family: var(--font-display);
  font-size: clamp(16px, 1rem + 0.35vw, 20px);
  font-weight: 700;
  color: var(--paper-white);
  line-height: 1.35;
}

.page-about .about-tl__chev {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 0.22s ease;
  justify-self: end;
  margin-top: -4px;
}

.page-about .about-tl__node[open] .about-tl__chev {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.page-about .about-tl__node[open] .about-tl__year {
  color: var(--coral);
}

.page-about .about-tl__body {
  padding: 0 2px 20px;
}

.page-about .about-tl__body p {
  margin: 0;
  color: var(--text-soft);
  font-size: var(--step-0);
  line-height: 1.8;
  max-width: 62ch;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(11, 27, 46, 0.94), rgba(6, 17, 31, 0.94));
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-team__item:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--paper-white);
  letter-spacing: -0.01em;
}

.page-about .about-team__item p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------- 04 分类 ---------- */
.page-about .about-cats {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .about-cats__visual {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(141, 107, 255, 0.4), rgba(54, 241, 227, 0.18));
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.4);
}

.page-about .about-cats__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

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

.page-about .about-cats__item {
  background: var(--ink-3);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-cats__name {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-cats__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 05 会员 ---------- */
.page-about .about-member {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .about-member__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(201, 166, 107, 0.28), rgba(141, 107, 255, 0.22));
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.4);
}

.page-about .about-member__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-plans {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-plans__item {
  position: relative;
  padding: 18px 18px 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-sm);
  background: rgba(11, 27, 46, 0.72);
}

.page-about .about-plans__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--paper-white);
}

.page-about .about-plans__item p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-member__note {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-member__link {
  margin: 14px 0 0;
}

.page-about .about-inlink {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 241, 227, 0.4);
  font-size: 14px;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-inlink:hover,
.page-about .about-inlink:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 06 合作与荣誉 ---------- */
.page-about .about-facts {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--ink-2);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 1.15rem + 0.8vw, 28px);
  font-weight: 700;
  color: var(--coral);
  letter-spacing: -0.01em;
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-mute);
}

.page-about .about-honors__head {
  margin: clamp(32px, 4vw, 48px) 0 8px;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 800;
  color: var(--paper-white);
  letter-spacing: -0.01em;
}

.page-about .about-honors__intro {
  margin: 0 0 18px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-mute);
  max-width: 62ch;
}

.page-about .about-honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid rgba(201, 166, 107, 0.28);
}

.page-about .about-honors__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(201, 166, 107, 0.18);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--text-soft);
  transition: background 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-honors__item:hover {
  background: rgba(201, 166, 107, 0.07);
  padding-left: 10px;
}

.page-about .about-honors__mark {
  flex: none;
  width: 8px;
  height: 8px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  margin-top: 2px;
}

.page-about .about-partner__note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 18px 20px;
  border-left: 2px solid var(--violet);
  background: rgba(141, 107, 255, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 66ch;
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  position: relative;
  padding: clamp(34px, 5vw, 62px) 0 clamp(46px, 7vw, 82px);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
}

.page-about .about-next__line {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper-white);
  max-width: 40ch;
  letter-spacing: -0.01em;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn {
  min-width: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-cats__list,
  .page-about .about-plans {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-index__list {
    column-gap: clamp(16px, 2.6vw, 34px);
  }
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 700px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-tl__summary {
    gap: 10px 22px;
    padding: 18px 2px;
  }
  .page-about .about-tl__item {
    padding-left: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: end;
  }
  .page-about .about-chapter__grid {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
  }
  .page-about .about-chapter__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
  .page-about .about-chapter__vert {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.28em;
    border-left: 1px solid var(--line-strong);
    padding-left: 12px;
    font-size: 12px;
  }
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
  .page-about .about-origin__media {
    margin-top: -28px;
    transform: rotate(-1.4deg);
  }
  .page-about .about-cats {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }
  .page-about .about-cats__visual {
    position: sticky;
    top: 96px;
  }
  .page-about .about-member {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }
  .page-about .about-member__media {
    margin-top: 12px;
    transform: rotate(1.2deg);
  }
  .page-about .about-plans {
    gap: 14px;
  }
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team__item:nth-child(2n) {
    transform: translateY(16px);
  }
  .page-about .about-team__item:nth-child(2n):hover {
    transform: translateY(12px);
  }
  .page-about .about-plans {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__item,
  .page-about .about-team__item:nth-child(2n),
  .page-about .about-team__item:nth-child(2n):hover,
  .page-about .about-origin__media,
  .page-about .about-member__media,
  .page-about .about-honors__item,
  .page-about .about-index__link {
    transform: none;
    transition: none;
  }
}
<<<END>>>