.page-about {
  --about-gap: clamp(52px, 7vw, 108px);
  --about-grid-line: rgba(185, 198, 210, .07);
  position: relative;
  background-color: var(--navy-900);
  color: var(--ink);
  overflow-x: clip;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}

.page-about::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(1240px, 130vw);
  height: 640px;
  background: radial-gradient(ellipse at 50% 0%, rgba(31, 138, 91, .26), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

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

/* ---------- 首屏框景 ---------- */
.page-about .about-frame {
  position: relative;
  margin-top: clamp(20px, 4vw, 40px);
  padding: clamp(24px, 4.5vw, 58px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(152deg, rgba(18, 40, 61, .94), rgba(10, 23, 38, .97));
  overflow: hidden;
}

.page-about .about-frame::before,
.page-about .about-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 9px;
  pointer-events: none;
}

.page-about .about-frame::before {
  top: 0;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 14px);
}

.page-about .about-frame::after {
  bottom: 0;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 14px);
}

.page-about .about-frame .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-frame__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--green-300);
  margin: 0 0 16px;
}

.page-about .about-frame__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.4vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: #FFFFFF;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 20ch;
}

.page-about .about-frame__lead {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--silver);
  max-width: 68ch;
  margin: 0 0 clamp(24px, 3.6vw, 40px);
}

.page-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);
}

@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .hero-stats > li {
  background: var(--navy-900);
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .hero-stats b {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--green-300);
}

.page-about .hero-stats span {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .05em;
  color: var(--silver);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding-top: var(--about-gap);
}

.page-about .about-sec:last-of-type {
  padding-bottom: var(--about-gap);
}

.page-about .about-sec__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: 18px;
}

@media (min-width: 960px) {
  .page-about .about-sec__inner {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 44px);
  }
}

.page-about .about-sec__track {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1;
  color: var(--green-300);
  border: 1px solid var(--line-green);
  padding: 5px 8px;
}

.page-about .about-sec__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--silver);
}

.page-about .about-sec__rule {
  display: none;
}

@media (min-width: 960px) {
  .page-about .about-sec__track {
    flex-direction: column;
    align-items: flex-start;
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-sec__rule {
    display: block;
    width: 1px;
    height: clamp(72px, 13vw, 190px);
    margin: 10px 0 0 8px;
    background: linear-gradient(180deg, var(--line-green), transparent);
  }
}

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

.page-about .about-h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: #FFFFFF;
  margin: 0 0 14px;
  max-width: 22ch;
}

.page-about .about-lead {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--silver);
  max-width: 68ch;
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-about .about-lead--after {
  margin-top: clamp(22px, 3vw, 34px);
  margin-bottom: 0;
}

.page-about .about-link {
  color: var(--green-300);
  text-decoration: none;
  border-bottom: 1px solid var(--line-green);
  padding-bottom: 1px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: #FFFFFF;
  border-color: var(--green-300);
}

/* ---------- 分段切换 ---------- */
.page-about .about-segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  background: rgba(18, 40, 61, .68);
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

.page-about .segmented__tab {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 9px 16px;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.page-about .segmented__tab:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.page-about .segmented__tab[aria-selected="true"] {
  color: var(--navy-900);
  background: linear-gradient(135deg, var(--green-300), var(--green-600));
  border-color: transparent;
}

.page-about .about-panel {
  display: block;
}

.page-about .about-panel[hidden] {
  display: none;
}

.page-about .about-panel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .about-panel__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 档案卡 ---------- */
.page-about .about-doc {
  position: relative;
  background: linear-gradient(160deg, rgba(18, 40, 61, .95), rgba(10, 23, 38, .98));
  border: 1px solid var(--line);
  padding: clamp(30px, 3.4vw, 40px) clamp(18px, 2.4vw, 28px) clamp(18px, 2.4vw, 28px);
  transition: border-color var(--t) var(--ease);
}

.page-about .about-doc:hover {
  border-color: var(--line-green);
}

.page-about .about-doc__tag {
  position: absolute;
  top: 0;
  inset-inline-end: 0;
  background: var(--green-900);
  color: var(--green-300);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1;
  padding: 8px 13px 9px;
  border-bottom: 1px solid var(--line-green);
  border-inline-start: 1px solid var(--line-green);
}

.page-about .about-doc__title {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: .01em;
  color: #FFFFFF;
  margin: 0 0 14px;
  max-width: 26ch;
}

.page-about .about-doc__rows {
  display: grid;
}

.page-about .about-doc__row {
  display: grid;
  grid-template-columns: minmax(80px, 30%) minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-doc__key {
  color: var(--green-300);
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .about-doc__val {
  color: var(--silver);
  min-width: 0;
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 38px);
}

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

.page-about .about-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-crew__item {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding: 18px 0 20px 16px;
}

.page-about .about-crew__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 20px;
  width: 2px;
  background: var(--green-300);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t) var(--ease);
}

.page-about .about-crew__item:hover::before,
.page-about .about-crew__item:focus-within::before {
  transform: scaleY(1);
}

.page-about .about-crew__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-crew__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--yellow);
}

.page-about .about-crew__name {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  font-weight: 800;
  color: #FFFFFF;
  margin: 0;
}

.page-about .about-crew__desc {
  margin: 0 0 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 52ch;
}

.page-about .about-crew__more {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--silver);
  max-width: 52ch;
  transition: color var(--t) var(--ease);
}

.page-about .about-crew__item:hover .about-crew__more,
.page-about .about-crew__item:focus-within .about-crew__more {
  color: #FFFFFF;
}

.page-about .about-crew__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  overflow: hidden;
  position: relative;
}

.page-about .about-crew__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.6) contrast(1.08) hue-rotate(-8deg);
  transition: transform var(--t-slow) var(--ease);
}

.page-about .about-crew__figure:hover img {
  transform: scale(1.02);
}

/* ---------- 通用横图 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0 0 clamp(24px, 3vw, 36px);
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.7) contrast(1.06) hue-rotate(-6deg);
}

.page-about .about-figure figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  background: rgba(10, 23, 38, .88);
  border-top: 1px solid var(--line-green);
  border-right: 1px solid var(--line-green);
  color: var(--silver);
  font-size: 12.5px;
  letter-spacing: .08em;
  padding: 9px 14px;
  max-width: 90%;
}

/* ---------- 履历区块 ---------- */
.page-about .about-resume-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 30px);
}

@media (min-width: 960px) {
  .page-about .about-resume-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-about .about-note {
  border: 1px solid var(--line);
  border-top: 3px solid var(--yellow);
  background: rgba(18, 40, 61, .7);
  padding: clamp(20px, 2.6vw, 28px);
}

.page-about .about-note__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: .02em;
}

.page-about .about-note__text {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-note__link {
  margin: 0;
  font-size: 14px;
}

/* ---------- 简史区块 ---------- */
@media (min-width: 960px) {
  .page-about .about-offset {
    margin-left: calc(100% / 12 * 2);
  }
}

.page-about .about-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .about-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-pair > *:nth-child(2) {
    transform: translateY(clamp(20px, 3vw, 44px));
  }
}

.page-about .about-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

@media (min-width: 900px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }
}

.page-about .about-eco__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.66) contrast(1.08) hue-rotate(-10deg);
  transition: transform var(--t-slow) var(--ease);
}

.page-about .about-eco__figure:hover img {
  transform: scale(1.03);
}

.page-about .about-eco__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(10, 23, 38, .12), rgba(10, 23, 38, .72)),
    repeating-linear-gradient(90deg, rgba(99, 224, 165, .09) 0 1px, transparent 1px 40px);
}

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

.page-about .about-eco__list {
  list-style: none;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 620px) {
  .page-about .about-eco__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-eco__list li {
  background: var(--navy-800);
  padding: 16px 18px 18px;
  min-width: 0;
}

.page-about .about-eco__list b {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--green-300);
  letter-spacing: -.01em;
}

.page-about .about-eco__list span {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 60ch;
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--green-300), var(--green-900));
}

.page-about .about-timeline > li {
  position: relative;
  padding-left: 34px;
  padding-bottom: 10px;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--green-300);
  background: var(--navy-900);
  transform: rotate(45deg);
}

.page-about .about-ver summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  padding: 14px 0 13px;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t) var(--ease);
}

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

.page-about .about-ver summary::after {
  content: "";
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--green-300);
  border-bottom: 1px solid var(--green-300);
  transform: rotate(45deg);
  transition: transform var(--t) var(--ease);
}

.page-about .about-ver[open] summary::after {
  transform: rotate(-135deg);
}

.page-about .about-ver summary:hover {
  border-color: var(--line-green);
}

.page-about .about-ver__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--yellow);
}

.page-about .about-ver__name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  min-width: 0;
}

.page-about .about-ver__body {
  padding: 13px 0 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 68ch;
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  margin: 0 0 clamp(40px, 6vw, 84px);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--green-600);
  background: linear-gradient(135deg, rgba(14, 59, 42, .82), rgba(10, 23, 38, .96) 62%);
  padding: clamp(26px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

@media (min-width: 860px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

.page-about .about-cta__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: #FFFFFF;
  margin: 0 0 12px;
  max-width: 24ch;
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 62ch;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew__item::before,
  .page-about .about-crew__figure img,
  .page-about .about-eco__figure img,
  .page-about .about-ver summary::after {
    transition: none;
  }

  .page-about .about-crew__figure:hover img,
  .page-about .about-eco__figure:hover img {
    transform: none;
  }
}