.page-about {
  --about-axis-w: 190px;
  --about-stripe-skew: -1.2deg;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: clamp(6px, 2vw, 18px) 0 clamp(34px, 6vw, 70px);
}

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--jz-line);
  border-radius: var(--jz-radius-l);
  padding: clamp(26px, 5vw, 64px) clamp(20px, 5vw, 64px) clamp(26px, 4vw, 52px);
  background:
    radial-gradient(115% 85% at 92% 8%, rgba(53, 224, 208, 0.13), transparent 58%),
    radial-gradient(90% 70% at 4% 100%, rgba(255, 106, 19, 0.12), transparent 62%),
    linear-gradient(165deg, var(--jz-night-2), var(--jz-night) 62%);
  box-shadow: var(--jz-shadow);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: repeating-linear-gradient(to bottom, var(--jz-cyan) 0 3px, transparent 3px 16px);
  opacity: 0.55;
}

.page-about .about-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--jz-gray);
}

.page-about .about-hero__kicker .jz-data {
  color: var(--jz-cyan);
}

.page-about .about-hero__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jz-orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 19, 0.18);
  flex: none;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  font-size: clamp(33px, 7.4vw, 66px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--jz-paper);
  transform: skewY(-1.3deg);
  transform-origin: left top;
}

.page-about .about-hero__lede {
  max-width: 64ch;
  margin: 0 0 clamp(26px, 4vw, 44px);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--jz-paper);
  opacity: 0.88;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 10px;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--jz-line-soft);
}

.page-about .about-hero__stat dt {
  margin: 0 0 6px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--jz-gray);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--jz-cyan);
}

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

  .page-about .about-hero__stat + .about-hero__stat {
    padding-left: 24px;
    border-left: 1px solid var(--jz-line-soft);
  }
}

/* ---------- 通用分栏 ---------- */
.page-about .about-section {
  position: relative;
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

@media (min-width: 920px) {
  .page-about .about-split {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 64px);
  }
}

.page-about .about-aside {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-aside__idx {
  margin: 0;
  font-size: 28px;
  line-height: 1;
  color: var(--jz-orange);
}

.page-about .about-aside .jz-note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
}

@media (min-width: 920px) {
  .page-about .about-aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    position: sticky;
    top: calc(var(--jz-hdr-h) + 26px);
    align-self: start;
  }
}

.page-about .about-body > * {
  margin: 0 0 clamp(14px, 2vw, 22px);
}

.page-about .about-body > *:last-child {
  margin-bottom: 0;
}

.page-about .about-body__h2 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--jz-paper);
}

.page-about .about-body__p {
  max-width: 66ch;
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.82;
  color: var(--jz-paper);
  opacity: 0.84;
}

.page-about .about-body__link {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-about .about-figure--cycle {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-figure img,
.page-about .about-media--2x1 img {
  display: block;
  width: 100%;
}

.page-about .about-media--2x1 {
  position: relative;
  margin: 0 0 clamp(24px, 3vw, 34px);
  aspect-ratio: 2 / 1;
  border: 1px solid var(--jz-line-soft);
  border-radius: var(--jz-radius-m);
  overflow: hidden;
  background: var(--jz-night-2);
}

.page-about .about-media--2x1 img {
  height: 100%;
  object-fit: cover;
}

.page-about .about-media--2x1 .jz-media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px 18px 14px;
  background: linear-gradient(to top, rgba(11, 27, 43, 0.9), transparent);
}

/* ---------- 斜切色带 ---------- */
.page-about .about-stripe {
  height: 10px;
  margin: 0 0 clamp(30px, 4vw, 54px);
  background: linear-gradient(90deg, var(--jz-orange), rgba(255, 106, 19, 0));
  transform: skewY(var(--about-stripe-skew));
  transform-origin: left center;
}

/* ---------- 区块标题 ---------- */
.page-about .about-section__head {
  max-width: 780px;
  margin: 0 0 clamp(24px, 3.4vw, 44px);
}

.page-about .about-section__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--jz-paper);
}

.page-about .about-section__lede {
  max-width: 60ch;
  margin: 14px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--jz-gray);
}

/* ---------- 三条内容线 ---------- */
.page-about .about-section--lines {
  background: var(--jz-night-2);
  border-top: 1px solid var(--jz-line-soft);
  border-bottom: 1px solid var(--jz-line-soft);
}

.page-about .about-lines {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

@media (min-width: 760px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-line {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--jz-line-soft);
  border-radius: var(--jz-radius-m);
  padding: clamp(20px, 2.6vw, 30px);
  background: linear-gradient(158deg, rgba(11, 27, 43, 0.92), rgba(11, 27, 43, 0.5));
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.page-about .about-line--a::before {
  background: var(--jz-pitch-lite);
}

.page-about .about-line--b::before {
  background: var(--jz-cyan);
}

.page-about .about-line--c::before {
  background: var(--jz-violet);
}

.page-about .about-line__idx {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--jz-gray);
}

.page-about .about-line__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  color: var(--jz-paper);
}

.page-about .about-line__desc {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--jz-paper);
  opacity: 0.8;
}

.page-about .about-line__link {
  margin: auto 0 0;
}

@media (min-width: 760px) {
  .page-about .about-line--b {
    transform: translateY(20px);
  }
}

/* ---------- 团队坐标网格 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0 0 clamp(16px, 2vw, 22px);
  padding: 0;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--jz-line-soft);
  border-radius: var(--jz-radius-m);
  background: var(--jz-night-2);
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__cell {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--jz-night);
}

.page-about .about-team__coord {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--jz-cyan);
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  color: var(--jz-paper);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--jz-gray);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-tlwrap {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

@media (min-width: 920px) {
  .page-about .about-tlwrap {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }
}

.page-about .about-axis {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-axis .jz-note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .about-axis__list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  width: 100%;
}

.page-about .about-axis__item a {
  display: inline-block;
  padding: 4px 0;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--jz-gray);
  text-decoration: none;
  transition: color 0.2s var(--jz-ease);
}

.page-about .about-axis__item a:hover,
.page-about .about-axis__item a[aria-current="true"] {
  color: var(--jz-cyan);
}

@media (min-width: 920px) {
  .page-about .about-axis {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    position: sticky;
    top: calc(var(--jz-hdr-h) + 26px);
    align-self: start;
  }

  .page-about .about-axis__list {
    flex-direction: column;
    gap: 0;
    margin-top: 14px;
    padding-left: 0;
    border-left: 1px solid var(--jz-line);
  }

  .page-about .about-axis__item {
    position: relative;
    padding: 8px 0 8px 20px;
  }

  .page-about .about-axis__item::before {
    content: "";
    position: absolute;
    left: -4.5px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--jz-night);
    border: 2px solid var(--jz-cyan);
  }
}

.page-about .about-tl {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  padding-left: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(16px, 2vw, 24px);
  border-left: 1px solid var(--jz-line);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jz-cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, 0.14);
}

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

.page-about .about-tl__det {
  border: 0;
}

.page-about .about-tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 0 0 10px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__year {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 700;
  color: var(--jz-cyan);
}

.page-about .about-tl__name {
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 800;
  color: var(--jz-paper);
}

.page-about .about-tl__mark {
  flex: none;
  margin-left: auto;
  align-self: center;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--jz-line-strong);
  border-radius: 50%;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1;
  color: var(--jz-cyan);
  transition: transform 0.22s var(--jz-ease);
}

.page-about .about-tl__det[open] .about-tl__mark {
  transform: rotate(45deg);
}

.page-about .about-tl__body {
  max-width: 66ch;
  padding-bottom: 6px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jz-paper);
  opacity: 0.82;
}

.page-about .about-tl__body p {
  margin: 0 0 10px;
}

.page-about .about-tl__body ul {
  margin: 0;
  padding-left: 18px;
}

.page-about .about-tl__body li {
  margin-bottom: 6px;
}

/* ---------- 更新流程 ---------- */
.page-about .about-section--cycle {
  background: var(--jz-night-2);
  border-top: 1px solid var(--jz-line-soft);
  border-bottom: 1px solid var(--jz-line-soft);
}

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

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

.page-about .about-flow__step {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--jz-line-soft);
  border-radius: var(--jz-radius-s);
  background: var(--jz-night);
  transition: background 0.22s var(--jz-ease), border-color 0.22s var(--jz-ease);
}

.page-about .about-flow__step:hover {
  background: rgba(21, 115, 71, 0.22);
  border-color: var(--jz-line-strong);
}

@media (min-width: 720px) {
  .page-about .about-flow__step:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -11px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    line-height: 1;
    color: var(--jz-orange);
    z-index: 1;
    pointer-events: none;
  }
}

.page-about .about-flow__num {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--jz-orange);
}

.page-about .about-flow__t {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--jz-paper);
}

.page-about .about-flow__d {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--jz-gray);
}

.page-about .about-flow__time {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--jz-line-soft);
  font-size: 13px;
  color: var(--jz-cyan);
}

/* ---------- 反馈 ---------- */
.page-about .about-fb {
  list-style: none;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-about .about-fb__item {
  display: flex;
  gap: 14px;
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--jz-line-soft);
  border-radius: var(--jz-radius-m);
  background: rgba(19, 41, 61, 0.5);
}

.page-about .about-fb__n {
  flex: none;
  margin: 0;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--jz-cyan);
}

.page-about .about-fb__item h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--jz-paper);
}

.page-about .about-fb__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--jz-gray);
}

/* ---------- 联系与共建 ---------- */
.page-about .about-join {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

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

.page-about .about-join__main .about-body__p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-join__card {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--jz-line);
  border-radius: var(--jz-radius-m);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(53, 224, 208, 0.12), transparent 60%),
    linear-gradient(155deg, rgba(21, 115, 71, 0.3), rgba(11, 27, 43, 0.92) 66%);
}

.page-about .about-join__ct {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 800;
  color: var(--jz-paper);
}

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

.page-about .jz-contact__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--jz-line-soft);
}

.page-about .jz-contact__key {
  font-size: 13px;
  color: var(--jz-gray);
}

.page-about .jz-contact__value {
  font-family: var(--font-data);
  font-size: 13.5px;
  color: var(--jz-paper);
  word-break: break-word;
}

.page-about .about-join__note {
  margin: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--jz-gray);
}

.page-about .about-join__card .about-body__link {
  margin: 0;
}

/* ---------- 平板与窄屏 ---------- */
@media (max-width: 759px) {
  .page-about .about-hero__frame {
    padding-left: clamp(22px, 6vw, 32px);
  }

  .page-about .about-tl__mark {
    margin-left: 0;
  }

  .page-about .about-line--b {
    transform: none;
  }
}

@media (max-width: 480px) {
  .page-about .about-hero__title {
    transform: none;
  }

  .page-about .about-fb__item {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .jz-contact__row {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-tl__mark,
  .page-about .about-axis__item a {
    transition: none;
  }
}