.page-about {
  --about-max: 1200px;
  --about-idx: 216px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: 12px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 20px 0;
  border-bottom: 2px solid var(--line);
  background: var(--ink);
  isolation: isolate;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(to right, rgba(44, 54, 64, 0.55) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(to bottom, rgba(44, 54, 64, 0.55) 0 1px, transparent 1px 72px);
  background-position: 0 0;
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 320px;
  height: 320px;
  z-index: -1;
  background: radial-gradient(circle, rgba(37, 230, 200, 0.16), transparent 68%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
  max-width: var(--about-max);
  margin: 0 auto;
}
.page-about .about-hero__copy {
  min-width: 0;
}
.page-about .about-hero .breadcrumbs {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.page-about .about-hero .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
}
.page-about .about-hero .breadcrumbs a:hover {
  color: var(--cyan);
}
.page-about .about-hero .breadcrumbs .sep {
  margin: 0 8px;
  color: var(--line);
}
.page-about .about-hero .breadcrumbs [aria-current="page"] {
  color: var(--cyan);
}
.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(236, 243, 246, 0.82);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 rgba(37, 230, 200, 0.16);
}
.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .about-hero__annot {
  position: absolute;
  top: 12px;
  right: 10px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-about .about-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  max-width: var(--about-max);
  margin: 34px auto 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--line);
  background: var(--line);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px 18px;
  background: var(--ink-2);
  min-width: 0;
}
.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-stat:nth-child(2) .about-stat__num {
  color: var(--orange);
}
.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--lime);
}
.page-about .about-stat:nth-child(4) .about-stat__num {
  color: var(--paper);
}
.page-about .about-stat__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
}
.page-about .about-stat__note {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: 8px 20px 64px;
}
.page-about .about-index {
  display: none;
}
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-chapter {
  padding: 38px 0 46px;
  border-top: 2px solid var(--line);
  scroll-margin-top: 90px;
}
.page-about .about-flow > .about-chapter:first-child {
  border-top: 0;
  padding-top: 30px;
}
.page-about .about-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}
.page-about .about-head__num {
  flex: none;
  padding-top: 7px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(236, 243, 246, 0.82);
  max-width: 48em;
}
.page-about .about-text:last-child {
  margin-bottom: 0;
}

/* ---------- 能力卡 ---------- */
.page-about .about-cards {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-card {
  position: relative;
  padding: 18px 18px 20px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 34px;
  height: 4px;
  background: var(--cyan);
}
.page-about .about-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}
.page-about .about-card__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--cyan);
}
.page-about .about-card__tag--orange {
  background: var(--orange);
}
.page-about .about-card__tag--magenta {
  background: var(--magenta);
  color: var(--paper);
}
.page-about .about-card__tag--lime {
  background: var(--lime);
}
.page-about .about-card__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .about-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.74);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 40px;
  list-style: none;
}
.page-about .about-timeline--tail {
  margin-top: 22px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: -40px;
  top: 5px;
  width: 14px;
  height: 14px;
  margin-left: 2px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
}
.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .about-timeline__text {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.74);
}

.page-about .about-figure {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  background: var(--ink-2);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .about-figure__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* ---------- 组织方法 ---------- */
.page-about .about-blocks {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}
.page-about .about-block {
  padding: 18px;
  border: 2px solid var(--line);
  background: var(--panel);
  border-left: 4px solid var(--cyan);
}
.page-about .about-block:nth-child(2) {
  border-left-color: var(--orange);
}
.page-about .about-block:nth-child(3) {
  border-left-color: var(--lime);
}
.page-about .about-block__idx {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-about .about-block__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--paper);
}
.page-about .about-block__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.76);
}
.page-about .about-callout {
  margin-top: 16px;
  padding: 16px 18px;
  border: 2px solid var(--line);
  border-left: 4px solid var(--orange);
  background: var(--ink-2);
}
.page-about .about-callout__key {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}
.page-about .about-callout__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.8);
}

/* ---------- 团队 ---------- */
.page-about .about-split {
  display: grid;
  gap: 20px;
  margin-top: 6px;
}
.page-about .about-split__media {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 rgba(255, 106, 42, 0.14);
}
.page-about .about-split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-split__body {
  min-width: 0;
}
.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-role {
  padding: 18px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  border-top: 4px solid var(--cyan);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-role--orange {
  border-top-color: var(--orange);
}
.page-about .about-role--lime {
  border-top-color: var(--lime);
}
.page-about .about-role:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}
.page-about .about-role__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-about .about-role--orange .about-role__tag {
  color: var(--orange);
}
.page-about .about-role--lime .about-role__tag {
  color: var(--lime);
}
.page-about .about-role__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--paper);
}
.page-about .about-role__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.76);
}

/* ---------- 查看模式 ---------- */
.page-about .about-modes {
  display: grid;
  gap: 12px;
  margin: 22px 0 24px;
  padding: 0;
  list-style: none;
}
.page-about .about-mode {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border: 2px solid var(--line);
  background: var(--ink-2);
}
.page-about .about-mode__key {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--cyan);
}
.page-about .about-mode:nth-child(2) .about-mode__key {
  background: var(--orange);
}
.page-about .about-mode:nth-child(3) .about-mode__key {
  background: var(--lime);
}
.page-about .about-mode__body {
  min-width: 0;
}
.page-about .about-mode__title {
  margin: 0 0 5px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}
.page-about .about-mode__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(236, 243, 246, 0.76);
}
.page-about .about-cta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
}

/* ---------- 合作 ---------- */
.page-about .about-partner {
  display: grid;
  gap: 20px;
  margin-top: 22px;
  padding: 20px;
  border: 2px solid var(--line);
  background:
    repeating-linear-gradient(to right, rgba(44, 54, 64, 0.5) 0 1px, transparent 1px 48px),
    var(--ink-2);
}
.page-about .about-partner__list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-partner__item {
  padding-left: 14px;
  border-left: 3px solid var(--magenta);
}
.page-about .about-partner__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}
.page-about .about-partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(236, 243, 246, 0.76);
}
.page-about .about-partner__contact {
  padding: 16px;
  border: 2px solid var(--line);
  background: var(--panel);
  min-width: 0;
}
.page-about .about-partner__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.page-about .about-partner__mail {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-all;
}
.page-about .about-partner__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}
.page-about .about-jump {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(236, 243, 246, 0.72);
}
.page-about .about-jump a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 230, 200, 0.4);
}
.page-about .about-jump a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partner__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-blocks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-modes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-mode {
    flex-direction: column;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 28px 0;
  }
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: center;
    gap: 44px;
  }
  .page-about .about-hero__visual img {
    aspect-ratio: 16 / 9;
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1fr);
    align-items: start;
    gap: 28px;
  }
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-partner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 24px;
    padding: 24px;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: 52px;
    padding: 40px 28px 88px;
  }
  .page-about .about-index {
    display: block;
    position: sticky;
    top: 28px;
    align-self: start;
    padding-top: 4px;
  }
  .page-about .about-flow > .about-chapter:first-child {
    padding-top: 4px;
  }
}

.page-about .about-index__caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-about .about-index__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  border-left: 2px solid var(--line);
}
.page-about .about-index__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-left: -2px;
  padding: 10px 0 10px 14px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.5;
  color: var(--steel);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
}
.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}
.page-about .about-index__foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.12em;
  color: var(--line);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-role,
  .page-about .about-timeline__dot,
  .page-about .about-index__link {
    transition: none;
  }
  .page-about .about-card:hover,
  .page-about .about-role:hover {
    transform: none;
  }
}