.page-about {
  --about-gap: clamp(52px, 8vw, 108px);
  --about-radius: var(--ky-radius);
  padding-block: 28px 96px;
  color: var(--ky-ice);
  font-family: var(--ky-font-body);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-crumbs {
  margin-bottom: 26px;
  font-family: var(--ky-font-num);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- 封面层 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: 8px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .about-hero__eyebrow,
.page-about .about-sec__eyebrow,
.page-about .about-cta__eyebrow {
  margin: 0 0 14px;
  color: var(--ky-cyan);
  font-family: var(--ky-font-num);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--ky-font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.2vw, 66px);
  line-height: 1.12;
  letter-spacing: -0.022em;
  color: var(--ky-ice);
}

.page-about .about-hero__hl {
  display: inline;
  color: var(--ky-cyan);
  background-image: linear-gradient(90deg, rgba(53, 228, 214, 0.28), rgba(53, 228, 214, 0));
  background-repeat: no-repeat;
  background-size: 100% 0.32em;
  background-position: 0 88%;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  color: var(--ky-mist);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 1px;
  list-style: none;
  border-radius: var(--about-radius);
  background: var(--ky-line);
  overflow: hidden;
}

.page-about .about-stats__item {
  padding: 18px 16px;
  background: var(--ky-deep);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--ky-font-num);
  font-size: clamp(24px, 5vw, 32px);
  line-height: 1;
  color: var(--ky-cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ky-mist);
  letter-spacing: 0.03em;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--about-radius);
  border: 1px solid var(--ky-line);
  background: var(--ky-deep);
}

/* ---------- 通用图片容器 ---------- */
.page-about .ky-media {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--ky-line);
  background: var(--ky-deep);
}

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

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

.page-about .about-sec__bignum {
  position: absolute;
  top: -0.28em;
  left: -0.06em;
  z-index: 0;
  font-family: var(--ky-font-num);
  font-size: clamp(88px, 20vw, 210px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(53, 228, 214, 0.055);
  pointer-events: none;
  user-select: none;
}

.page-about .about-sec__inner {
  position: relative;
  z-index: 1;
  padding-top: 4px;
}

.page-about .about-sec__title {
  margin: 0 0 20px;
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.28;
  letter-spacing: -0.012em;
  color: var(--ky-ice);
}

.page-about .about-p {
  max-width: 64ch;
  margin: 0 0 15px;
  color: var(--ky-ice);
  line-height: 1.85;
}

.page-about .about-p:last-child {
  margin-bottom: 0;
}

/* ---------- 团队分工比例条 ---------- */
.page-about .about-ratio {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-ratio__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .about-ratio__name {
  font-size: 14px;
  color: var(--ky-ice);
}

.page-about .about-ratio__track {
  display: block;
  height: 10px;
  border-radius: 999px;
  border: 1px solid var(--ky-line);
  background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.page-about .about-ratio__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--ky-cyan) 0%, var(--ky-cyan-soft) 100%);
}

.page-about .about-ratio__fill--soft {
  background: linear-gradient(90deg, rgba(53, 228, 214, 0.42) 0%, rgba(143, 243, 234, 0.55) 100%);
}

.page-about .about-ratio__fill--w35 {
  width: 35.4%;
}

.page-about .about-ratio__fill--w65 {
  width: 64.6%;
}

.page-about .about-ratio__val {
  font-size: 15px;
  color: var(--ky-cyan);
  text-align: left;
}

/* ---------- 来源与复核 ---------- */
.page-about .about-source {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 24px;
}

.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--ky-line);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ky-deep);
  transition: background 0.22s ease;
}

.page-about .about-step + .about-step {
  border-top: 1px solid var(--ky-line);
}

.page-about .about-step:hover {
  background: rgba(53, 228, 214, 0.07);
}

.page-about .about-step__num {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ky-cyan);
}

.page-about .about-step__txt {
  font-size: 14px;
  color: var(--ky-ice);
  line-height: 1.6;
}

.page-about .about-source__visual {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-flowwrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 22px 18px;
  border-radius: var(--about-radius);
  border: 1px solid var(--ky-line-cyan);
  background: var(--ky-glass);
}

.page-about .about-flow {
  width: 100%;
  max-width: 190px;
  height: auto;
}

.page-about .about-flow__dot {
  fill: var(--ky-void);
  stroke: var(--ky-cyan);
  stroke-width: 2;
}

.page-about .about-flow__note {
  margin: 0;
  font-family: var(--ky-font-num);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--ky-cyan-soft);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 34px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--ky-cyan) 0%, rgba(53, 228, 214, 0.35) 55%, rgba(53, 228, 214, 0) 100%);
}

.page-about .about-tl__node {
  position: relative;
  padding-bottom: 30px;
  outline: none;
}

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

.page-about .about-tl__dot {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border: 1px solid var(--ky-cyan);
  background: var(--ky-void);
  display: grid;
  place-items: center;
  transition: box-shadow 0.22s ease, border-color 0.22s ease;
}

.page-about .about-tl__dot::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ky-cyan);
  transition: transform 0.22s ease;
}

.page-about .about-tl__node:hover .about-tl__dot::after,
.page-about .about-tl__node:focus .about-tl__dot::after,
.page-about .about-tl__node:focus-within .about-tl__dot::after {
  transform: scale(1.5);
}

.page-about .about-tl__node:hover .about-tl__dot,
.page-about .about-tl__node:focus .about-tl__dot,
.page-about .about-tl__node:focus-within .about-tl__dot {
  border-color: var(--ky-cyan-soft);
  box-shadow: 0 0 0 4px rgba(53, 228, 214, 0.14);
}

.page-about .about-tl__node:focus-visible {
  outline: 2px solid var(--ky-cyan);
  outline-offset: 6px;
  border-radius: 6px;
}

.page-about .about-tl__body {
  padding: 16px 18px;
  border-radius: var(--about-radius);
  border: 1px solid var(--ky-line);
  background: var(--ky-deep);
  transition: background 0.24s ease, border-color 0.24s ease, transform 0.24s ease;
}

.page-about .about-tl__node:hover .about-tl__body,
.page-about .about-tl__node:focus-within .about-tl__body {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--ky-line-cyan);
  transform: translateY(-3px);
}

.page-about .about-tl__ver {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--ky-line-cyan);
  background: rgba(53, 228, 214, 0.09);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ky-cyan);
  text-transform: uppercase;
}

.page-about .about-tl__h {
  margin: 12px 0 0;
  font-family: var(--ky-font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ky-ice);
}

.page-about .about-tl__desc {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ky-mist);
}

.page-about .about-tl__caps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-cap {
  padding: 5px 11px;
  border-radius: 6px;
  border: 1px solid var(--ky-line);
  background: rgba(255, 255, 255, 0.04);
  font-family: var(--ky-font-num);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ky-cyan-soft);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-cover__media {
  margin: 0;
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-tag {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--ky-line-cyan);
  background: var(--ky-glass);
  font-family: var(--ky-font-num);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ky-cyan-soft);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .about-tag:hover {
  background: var(--ky-glass-hi);
  border-color: var(--ky-cyan);
  color: var(--ky-ice);
  transform: translateY(-2px);
}

.page-about .about-tags--soft {
  margin-top: 26px;
}

.page-about .about-tags--soft .about-tag {
  border-color: var(--ky-line);
  color: var(--ky-mist);
}

.page-about .about-tags--soft .about-tag:hover {
  color: var(--ky-ice);
  border-color: var(--ky-line-cyan);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: var(--about-gap);
}

.page-about .about-cta__inner {
  position: relative;
  padding: 34px 24px;
  border-radius: var(--about-radius);
  border: 1px solid var(--ky-line-cyan);
  background:
    radial-gradient(120% 140% at 92% 0%, rgba(53, 228, 214, 0.14) 0%, rgba(53, 228, 214, 0) 58%),
    linear-gradient(180deg, rgba(10, 22, 51, 0.95) 0%, rgba(5, 11, 31, 0.98) 100%);
  overflow: hidden;
}

.page-about .about-cta__title {
  margin: 0 0 16px;
  font-family: var(--ky-font-display);
  font-weight: 700;
  font-size: clamp(23px, 4.2vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ky-ice);
}

.page-about .about-cta__text {
  max-width: 62ch;
  margin: 0 0 26px;
  color: var(--ky-mist);
  line-height: 1.85;
}

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

.page-about .about-cta__aside {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ky-line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ky-mist);
}

.page-about .about-cta__link {
  color: var(--ky-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 228, 214, 0.4);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  color: var(--ky-ice);
  border-color: var(--ky-ice);
}

.page-about .about-cta__link:focus-visible {
  outline: 2px solid var(--ky-cyan);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-ratio__row {
    grid-template-columns: 210px minmax(0, 1fr) 60px;
    align-items: center;
    gap: 20px;
  }

  .page-about .about-ratio__val {
    text-align: right;
  }

  .page-about .about-sec__inner {
    padding-top: 0;
  }
}

/* ---------- 桌面端非对称栅格 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-source {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-source__visual {
    padding-top: 6px;
  }

  .page-about .about-cover {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-tl {
    padding-left: 44px;
  }

  .page-about .about-tl::before {
    left: 12px;
  }

  .page-about .about-tl__dot {
    left: -44px;
    width: 25px;
    height: 25px;
    top: 2px;
  }

  .page-about .about-tl__dot::after {
    width: 9px;
    height: 9px;
  }

  .page-about .about-cta__inner {
    padding: 52px 48px;
  }

  .page-about .about-sec--wide .about-sec__inner {
    max-width: 1040px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-sec__inner {
    max-width: 1020px;
  }

  .page-about .about-sec--wide .about-sec__inner {
    max-width: 1120px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__body,
  .page-about .about-tl__dot,
  .page-about .about-tl__dot::after,
  .page-about .about-tag,
  .page-about .about-step {
    transition: none;
  }

  .page-about .about-tl__node:hover .about-tl__body,
  .page-about .about-tl__node:focus-within .about-tl__body {
    transform: none;
  }
}
</main>