.page-about {
  --about-rule: 2px solid var(--line-400);
  --about-rule-thin: 1px solid var(--line-400);
  --about-gutter: clamp(18px, 4vw, 40px);
  --about-flow: clamp(56px, 9vw, 112px);
  background: var(--ink-900);
  color: var(--ice-50);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin: 0;
}

.page-about p {
  margin: 0;
  line-height: 1.8;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 48px) 0 clamp(48px, 8vw, 96px);
  border-bottom: var(--about-rule);
  background:
    linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 58%, var(--ink-900) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -34%;
  width: 82%;
  height: 92%;
  background: linear-gradient(128deg, rgba(34, 211, 238, 0.24), rgba(34, 211, 238, 0) 68%);
  transform: skewY(-7deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(36, 67, 102, 0.55) 0 1px, transparent 1px 96px);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__eyebrow {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-300);
  border-bottom: 2px solid var(--cyan-500);
  display: inline-block;
  padding-bottom: 6px;
  margin-bottom: 20px;
}

.page-about .about-hero__title {
  font-size: clamp(2rem, 7.2vw, 4.5rem);
  font-weight: 800;
  max-width: 16ch;
}

.page-about .about-hero__title-mark {
  color: var(--cyan-300);
  position: relative;
}

.page-about .about-hero__lead {
  margin-top: clamp(20px, 3vw, 32px);
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--slate-300);
}

.page-about .about-stats {
  display: grid;
  gap: 2px;
  margin: clamp(36px, 6vw, 64px) 0 0;
  grid-template-columns: 1fr;
  border: var(--about-rule);
  background: var(--line-400);
}

.page-about .about-stats__item {
  background: var(--ink-800);
  padding: 20px 18px 22px;
  margin: 0;
}

.page-about .about-stats__label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate-300);
  text-transform: uppercase;
}

.page-about .about-stats__value {
  display: block;
  margin: 8px 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 600;
  color: var(--ice-50);
  border-bottom: 2px solid var(--cyan-500);
  padding-bottom: 6px;
  width: fit-content;
}

.page-about .about-stats__value span {
  font-size: 14px;
  color: var(--cyan-300);
  margin-left: 4px;
  font-weight: 500;
}

.page-about .about-stats__unit {
  font-family: var(--font-body);
  font-size: 14px !important;
  color: var(--slate-300) !important;
  font-weight: 400 !important;
}

.page-about .about-stats__note {
  font-size: 13px;
  color: var(--slate-300);
  line-height: 1.65;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: var(--about-flow) 0;
  border-bottom: var(--about-rule-thin);
}

.page-about .about-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-head__index {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-300);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-about .about-head__title {
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  font-weight: 800;
}

.page-about .about-head__note {
  margin-top: 16px;
  max-width: 58ch;
  color: var(--slate-300);
  font-size: 15px;
}

.page-about .about-head--wide .about-head__title {
  font-size: clamp(1.8rem, 6vw, 3.4rem);
}

.page-about .about-lead {
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--ice-50);
  border-left: 2px solid var(--cyan-500);
  padding-left: 18px;
  margin-bottom: 22px;
}

.page-about .about-section p + p {
  margin-top: 16px;
}

.page-about .about-section p:not(.about-lead):not(.about-links) {
  color: var(--slate-300);
  font-size: 15.5px;
}

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

/* ---------- 定位 ---------- */
.page-about .about-origin__inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  grid-template-columns: 1fr;
}

.page-about .about-scenes {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-scenes__item {
  position: relative;
  border: var(--about-rule);
  background: var(--ink-800);
  padding: 20px 20px 22px;
  box-shadow: var(--shadow-brut);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-scenes__item:hover,
.page-about .about-scenes__item:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: var(--cyan-500);
}

.page-about .about-scenes__num {
  display: inline-block;
  font-size: 12px;
  color: var(--ink-900);
  background: var(--cyan-500);
  padding: 2px 8px;
  margin-bottom: 12px;
}

.page-about .about-scenes__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--ice-50);
}

.page-about .about-scenes__text {
  font-size: 14.5px;
  color: var(--slate-300) !important;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800) 70%, var(--ink-900));
}

.page-about .about-timeline__figure {
  border: var(--about-rule);
  box-shadow: var(--shadow-brut);
  margin: 0 0 clamp(24px, 4vw, 36px);
}

.page-about .about-yearjump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(28px, 4vw, 44px);
  padding: 14px;
  border: var(--about-rule);
  background: var(--ink-700);
}

.page-about .about-yearjump__link {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--cyan-300);
  padding: 6px 12px;
  border: 1px solid var(--line-400);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-yearjump__link:hover {
  background: var(--cyan-500);
  border-color: var(--cyan-500);
  color: var(--ink-900);
}

.page-about .about-yearjump__link:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 2px;
}

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  position: relative;
  padding: 26px 0 26px 26px;
  border-left: var(--about-rule);
  scroll-margin-top: 96px;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: var(--ink-900);
  border: 2px solid var(--cyan-500);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within,
.page-about .about-timeline__item:target {
  border-left-color: var(--cyan-500);
  background: rgba(34, 211, 238, 0.05);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before,
.page-about .about-timeline__item:target::before {
  background: var(--orange-500);
  border-color: var(--orange-500);
}

.page-about .about-timeline__year {
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--cyan-300);
  line-height: 1;
}

.page-about .about-timeline__title {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ice-50);
}

.page-about .about-timeline__body p {
  color: var(--slate-300) !important;
  font-size: 15px;
}

.page-about .about-timeline__body .tag {
  display: inline-block;
  margin-top: 14px;
}

/* ---------- 标签归并 ---------- */
.page-about .about-tags {
  background: var(--ink-800);
  border-top: var(--about-rule);
}

.page-about .about-tags__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line-400);
  border: var(--about-rule);
  margin: 28px 0;
}

.page-about .about-tags__figure {
  background: var(--ink-700);
  padding: 18px 16px 20px;
}

.page-about .about-tags__figure--mid {
  background: var(--ink-900);
}

.page-about .about-tags__figure--accent {
  background: var(--ink-900);
}

.page-about .about-tags__num {
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 600;
  color: var(--ice-50);
  line-height: 1;
  border-bottom: 2px solid var(--cyan-500);
  padding-bottom: 8px;
  width: fit-content;
}

.page-about .about-tags__figure--accent .about-tags__num {
  color: var(--orange-300);
  border-bottom-color: var(--orange-500);
}

.page-about .about-tags__cap {
  margin-top: 10px;
  font-size: 13px;
  color: var(--slate-300);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-roster {
  border: var(--about-rule);
  background: var(--ink-800);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-roster[open] {
  border-color: var(--cyan-500);
  box-shadow: var(--shadow-soft);
}

.page-about .about-roster__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ice-50);
}

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

.page-about .about-roster__summary:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 2px;
}

.page-about .about-roster__count {
  font-size: 20px;
  font-weight: 600;
  color: var(--cyan-300);
  min-width: 2.4ch;
}

.page-about .about-roster__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.page-about .about-roster__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--cyan-300);
}

.page-about .about-roster[open] .about-roster__summary::after {
  content: "−";
}

.page-about .about-roster__text {
  padding: 0 18px 18px;
  font-size: 14.5px;
  color: var(--slate-300) !important;
  border-top: 1px dashed var(--line-400);
  padding-top: 14px;
  margin-top: 0;
}

.page-about .about-team__process {
  margin-top: 20px !important;
  padding: 18px;
  border: var(--about-rule);
  background: var(--ink-700);
  font-size: 14.5px;
  color: var(--slate-300) !important;
  box-shadow: var(--shadow-brut);
}

.page-about .about-team__process-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-300);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.page-about .about-team__figure {
  border: var(--about-rule);
  box-shadow: var(--shadow-brut);
  margin: 0;
}

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

/* ---------- 覆盖与协作 ---------- */
.page-about .about-reach {
  background: var(--ink-800);
  border-top: var(--about-rule);
}

.page-about .about-reach__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 48px);
  align-items: start;
}

.page-about .about-reach__figure {
  border: var(--about-rule);
  box-shadow: var(--shadow-brut);
  margin: 0;
}

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

/* ---------- 联系 ---------- */
.page-about .about-contact {
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
}

.page-about .about-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .about-contact__card {
  border: var(--about-rule);
  background: var(--ink-700);
  padding: 22px 20px;
  margin: 0;
}

.page-about .about-contact__value {
  margin: 12px 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.6vw, 19px);
  font-weight: 500;
  color: var(--cyan-300);
  word-break: break-word;
  border-bottom: 2px solid var(--cyan-500);
  padding-bottom: 8px;
  width: fit-content;
  max-width: 100%;
}

.page-about .about-contact__value--sm {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ice-50);
  border-bottom-color: var(--line-400);
}

.page-about .about-contact__hint {
  font-size: 13.5px;
  color: var(--slate-300) !important;
  line-height: 1.7;
}

.page-about .about-contact__card .copy-btn {
  margin-top: 16px;
}

.page-about .about-contact__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line-400);
  border: var(--about-rule);
}

.page-about .about-contact__links li {
  background: var(--ink-900);
}

.page-about .about-contact__links a {
  display: block;
  padding: 15px 18px;
  color: var(--ice-50);
  text-decoration: none;
  font-size: 15px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-contact__links a:hover {
  background: var(--ink-700);
  color: var(--cyan-300);
  padding-left: 24px;
}

.page-about .about-contact__links a:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: -2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 768px) {
  .page-about .about-origin__inner {
    grid-template-columns: minmax(220px, 5fr) 7fr;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-origin__side {
    position: sticky;
    top: 32px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 110px 1fr;
    gap: 6px 28px;
    padding: 32px 0 32px 32px;
  }

  .page-about .about-timeline__year {
    position: sticky;
    top: 24px;
    height: fit-content;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .about-reach__inner {
    grid-template-columns: 1.15fr 0.85fr;
  }

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

@media (min-width: 1024px) {
  .page-about .about-timeline__item {
    grid-template-columns: 150px 1fr;
    gap: 6px 40px;
    padding-left: 40px;
  }

  .page-about .about-hero__title {
    max-width: 18ch;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scenes__item,
  .page-about .about-timeline__item,
  .page-about .about-contact__links a,
  .page-about .about-yearjump__link {
    transition: none;
  }

  .page-about .about-scenes__item:hover {
    transform: none;
  }

  .page-about .about-contact__links a:hover {
    padding-left: 18px;
  }
}
<<<END>>>