.page-about {
  --about-rail: 92px;
  --about-gap: clamp(20px, 3vw, 38px);
  color: var(--jy-cream);
}

.page-about .about-intro {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3vw, 36px) clamp(44px, 7vw, 96px);
}

.page-about .about-intro::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: clamp(260px, 48vw, 660px);
  aspect-ratio: 1;
  border-radius: 44% 56% 60% 40% / 54% 42% 58% 46%;
  background: radial-gradient(circle at 36% 34%, rgba(22, 242, 200, 0.2), rgba(22, 242, 200, 0) 68%);
  pointer-events: none;
}

.page-about .about-intro__layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 40px);
}

.page-about .about-intro__title {
  font-family: var(--jy-font-head);
  font-size: clamp(1.95rem, 6.2vw, 4.1rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 0.32em 0 0.42em;
  max-width: 18ch;
}

.page-about .about-intro__lead {
  max-width: 58ch;
  color: var(--jy-cream);
  opacity: 0.9;
}

.page-about .about-intro__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-intro__board {
  display: grid;
  border: 1px solid var(--jy-edge);
  border-radius: var(--jy-r-lg);
  background: linear-gradient(158deg, rgba(20, 58, 49, 0.9), rgba(11, 43, 36, 0.58));
  overflow: hidden;
  align-self: start;
}

.page-about .about-intro__row {
  display: grid;
  grid-template-columns: minmax(74px, auto) minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 14px 18px;
  border-top: 1px solid rgba(42, 96, 85, 0.55);
}

.page-about .about-intro__row:first-child {
  border-top: 0;
}

.page-about .about-intro__val {
  color: var(--jy-cyan);
  font-size: 1.12rem;
  letter-spacing: 0.05em;
}

.page-about .about-intro__lab {
  font-size: 0.94rem;
  color: var(--jy-stand);
  line-height: 1.6;
}

@media (min-width: 960px) {
  .page-about .about-intro__layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.86fr);
    align-items: end;
    gap: clamp(32px, 5vw, 76px);
  }
}

/* 通用章节头 */
.page-about .about-head {
  max-width: 62ch;
}

.page-about .about-head h2 {
  font-family: var(--jy-font-head);
  font-size: clamp(1.5rem, 3.6vw, 2.55rem);
  font-weight: 800;
  line-height: 1.14;
  margin: 0.3em 0 0.55em;
}

.page-about .about-head__note {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.72;
  color: var(--jy-stand);
}

/* 通用图片框 */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure__frame {
  border-radius: var(--jy-r-lg);
  overflow: hidden;
  border: 1px solid rgba(42, 96, 85, 0.6);
  background: var(--jy-tunnel);
}

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

.page-about .about-figure__frame--4x3 { aspect-ratio: 4 / 3; }
.page-about .about-figure__frame--14x9 { aspect-ratio: 14 / 9; }
.page-about .about-figure__frame--13x8 { aspect-ratio: 13 / 8; }

.page-about .about-figure__cap {
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--jy-stand);
}

/* 起点 */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .about-origin__text h2 {
  font-family: var(--jy-font-head);
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.14;
  margin: 0.3em 0 0.5em;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
  .page-about .about-origin__figure {
    margin-top: 8px;
  }
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
}

.page-about .about-tl {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.6vw, 30px);
  position: relative;
}

.page-about .about-tl__item {
  display: grid;
  gap: 14px;
  position: relative;
}

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

.page-about .about-tl__year {
  font-family: var(--jy-font-num);
  font-size: 0.86rem;
  letter-spacing: 0.16em;
  color: var(--jy-stand);
  white-space: nowrap;
}

.page-about .about-tl__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex: none;
  background: var(--jy-field);
  border: 2px solid var(--jy-cyan);
  box-shadow: 0 0 0 4px rgba(22, 242, 200, 0.12);
}

.page-about .about-tl__card {
  border-radius: var(--jy-r-lg);
}

@media (min-width: 820px) {
  .page-about .about-tl::before {
    content: "";
    position: absolute;
    left: calc(var(--about-rail) - 15px);
    top: 18px;
    bottom: 18px;
    width: 1px;
    background: linear-gradient(180deg, rgba(22, 242, 200, 0.6), rgba(42, 96, 85, 0.34) 62%, rgba(42, 96, 85, 0));
  }

  .page-about .about-tl__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-tl__rail {
    position: relative;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding-top: 14px;
    min-height: 100%;
  }

  .page-about .about-tl__year {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.22em;
    font-size: 0.92rem;
  }

  .page-about .about-tl__dot {
    position: absolute;
    right: 9px;
    top: 16px;
  }
}

/* 团队 */
.page-about .about-team__figure {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-team__card {
  border: 1px solid rgba(42, 96, 85, 0.75);
  border-radius: var(--jy-r-lg);
  padding: clamp(20px, 2.6vw, 28px);
  background: linear-gradient(156deg, rgba(20, 58, 49, 0.92), rgba(11, 43, 36, 0.7));
}

.page-about .about-team__role {
  font-family: var(--jy-font-num);
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  color: var(--jy-cyan);
  margin: 0 0 14px;
}

.page-about .about-team__name {
  font-family: var(--jy-font-head);
  font-size: clamp(1.08rem, 1.7vw, 1.32rem);
  font-weight: 700;
  line-height: 1.32;
  margin: 0 0 12px;
}

.page-about .about-team__body {
  margin: 0 0 16px;
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(232, 239, 234, 0.86);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--jy-stand);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--jy-orange);
}

@media (min-width: 780px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .about-team__card--b { margin-top: 28px; }
  .page-about .about-team__card--c { margin-top: 12px; }
  .page-about .about-team__card--d { margin-top: 44px; }
}

/* 内容流程 */
.page-about .about-flow__list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
}

.page-about .about-flow__step {
  position: relative;
  padding: 26px 20px 24px;
  border-radius: var(--jy-r-md);
  border: 1px solid rgba(42, 96, 85, 0.72);
  background: rgba(11, 43, 36, 0.62);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--jy-cyan), rgba(22, 242, 200, 0) 88%);
}

.page-about .about-flow__idx {
  display: block;
  font-family: var(--jy-font-num);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--jy-cyan);
  margin-bottom: 12px;
}

.page-about .about-flow__name {
  font-family: var(--jy-font-head);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 10px;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: rgba(232, 239, 234, 0.84);
}

.page-about .about-flow__foot {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--jy-stand);
}

.page-about .about-flow__foot a {
  color: var(--jy-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 900px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 数据合作 */
.page-about .about-partner__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .about-partner__text h2 {
  font-family: var(--jy-font-head);
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.14;
  margin: 0.3em 0 0.55em;
}

.page-about .about-partner__text .jy-prose p {
  margin: 0 0 1em;
  font-size: 0.97rem;
  line-height: 1.82;
  color: rgba(232, 239, 234, 0.88);
}

.page-about .about-partner__text .jy-btn {
  margin-top: 8px;
}

.page-about .about-partner__board {
  border: 1px solid var(--jy-edge);
  border-radius: var(--jy-r-lg);
  padding: clamp(22px, 3vw, 32px);
  background: linear-gradient(162deg, rgba(20, 58, 49, 0.86), rgba(18, 22, 26, 0.72));
}

.page-about .about-partner__plate {
  margin-bottom: 14px;
}

.page-about .about-partner__big {
  font-family: var(--jy-font-num);
  font-size: clamp(3rem, 7vw, 4.6rem);
  line-height: 1;
  color: var(--jy-orange);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.page-about .about-partner__sub {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: rgba(232, 239, 234, 0.8);
}

.page-about .about-partner__divider {
  height: 1px;
  margin: 26px 0 22px;
  background: linear-gradient(90deg, var(--jy-edge), rgba(42, 96, 85, 0));
}

@media (min-width: 900px) {
  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

/* 服务覆盖 */
.page-about .about-reach__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}

.page-about .about-reach__text h2 {
  font-family: var(--jy-font-head);
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.14;
  margin: 0.3em 0 0.55em;
}

.page-about .about-reach__text .jy-prose p {
  margin: 0 0 1em;
  font-size: 0.97rem;
  line-height: 1.82;
  color: rgba(232, 239, 234, 0.88);
}

.page-about .about-reach__list {
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-reach__list li {
  display: grid;
  gap: 6px;
  padding-left: 14px;
  border-left: 2px solid rgba(22, 242, 200, 0.4);
}

.page-about .about-reach__k {
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  color: var(--jy-cyan);
}

.page-about .about-reach__v {
  font-size: 0.93rem;
  line-height: 1.72;
  color: rgba(232, 239, 234, 0.82);
}

@media (min-width: 900px) {
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }
  .page-about .about-reach__figure {
    order: 0;
  }
}

/* 里程碑 */
.page-about .about-milestone__grid {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid rgba(42, 96, 85, 0.65);
}

.page-about .about-milestone__item {
  padding: 22px 4px 24px;
  border-bottom: 1px solid rgba(42, 96, 85, 0.5);
}

.page-about .about-milestone__num {
  font-family: var(--jy-font-num);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.05;
  color: var(--jy-whistle);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-about .about-milestone__label {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(232, 239, 234, 0.8);
  max-width: 34ch;
}

.page-about .about-milestone__cta {
  margin-top: clamp(32px, 5vw, 60px);
  padding-top: clamp(24px, 3.4vw, 36px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px clamp(20px, 4vw, 44px);
  justify-content: space-between;
}

.page-about .about-milestone__ctatext {
  margin: 0;
  font-size: clamp(1rem, 2vw, 1.24rem);
  line-height: 1.5;
  color: var(--jy-cream);
  max-width: 42ch;
}

@media (min-width: 700px) {
  .page-about .about-milestone__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1040px) {
  .page-about .about-milestone__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 窄屏细节 */
@media (max-width: 560px) {
  .page-about .about-intro__title {
    max-width: none;
  }
  .page-about .about-intro__acts .jy-btn {
    flex: 1 1 auto;
    text-align: center;
  }
  .page-about .about-milestone__cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__dot {
    box-shadow: none;
  }
}
<<<END>>>